Merge from trunk

(bzr r11950.1.50)

45 files changed, 1029 insertions, 365 deletions

diff --git a/src/display/canvas-axonomgrid.cpp b/src/display/canvas-axonomgrid.cpp
index bfc6f27c4..170684328 100644
--- a/src/display/canvas-axonomgrid.cpp
+++ b/src/display/canvas-axonomgrid.cpp
@@ -12,11 +12,20 @@
   * smaller than 90 degrees (measured from horizontal, 0 degrees being a line extending
   * to the right). The x-axis will always have an angle between 0 and 90 degrees.
   */
- 
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
 
 #include <gtkmm/box.h>
 #include <gtkmm/label.h>
-#include <gtkmm/table.h>
+
+#if WITH_GTKMM_3_0
+# include <gtkmm/grid.h>
+#else
+# include <gtkmm/table.h>
+#endif
+
 #include <glibmm/i18n.h>
 
 #include "display/canvas-axonomgrid.h"
@@ -83,28 +92,60 @@ namespace Inkscape {
 #define SPACE_SIZE_X 15
 #define SPACE_SIZE_Y 10
 static inline void
+#if WITH_GTKMM_3_0
+attach_all(Gtk::Grid &table, Gtk::Widget const *const arr[], unsigned size, int start = 0)
+#else
 attach_all(Gtk::Table &table, Gtk::Widget const *const arr[], unsigned size, int start = 0)
+#endif
 {
     for (unsigned i=0, r=start; i<size/sizeof(Gtk::Widget*); i+=2) {
         if (arr[i] && arr[i+1]) {
+#if WITH_GTKMM_3_0
+            (const_cast<Gtk::Widget&>(*arr[i])).set_hexpand();
+            (const_cast<Gtk::Widget&>(*arr[i])).set_valign(Gtk::ALIGN_CENTER);
+            table.attach(const_cast<Gtk::Widget&>(*arr[i]),   1, r, 1, 1);
+
+            (const_cast<Gtk::Widget&>(*arr[i+1])).set_hexpand();
+            (const_cast<Gtk::Widget&>(*arr[i+1])).set_valign(Gtk::ALIGN_CENTER);
+            table.attach(const_cast<Gtk::Widget&>(*arr[i+1]), 2, r, 1, 1);
+#else
             table.attach (const_cast<Gtk::Widget&>(*arr[i]),   1, 2, r, r+1,
                           Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
             table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 2, 3, r, r+1,
                           Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
+#endif
         } else {
             if (arr[i+1]) {
+#if WITH_GTKMM_3_0
+                (const_cast<Gtk::Widget&>(*arr[i+1])).set_hexpand();
+                (const_cast<Gtk::Widget&>(*arr[i+1])).set_valign(Gtk::ALIGN_CENTER);
+                table.attach(const_cast<Gtk::Widget&>(*arr[i+1]), 1, r, 2, 1);
+#else
                 table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 1, 3, r, r+1,
                               Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
+#endif
             } else if (arr[i]) {
                 Gtk::Label& label = reinterpret_cast<Gtk::Label&> (const_cast<Gtk::Widget&>(*arr[i]));
                 label.set_alignment (0.0);
+#if WITH_GTKMM_3_0
+                label.set_hexpand();
+                label.set_valign(Gtk::ALIGN_CENTER);
+                table.attach(label, 0, r, 3, 1);
+#else
                 table.attach (label, 0, 3, r, r+1,
                               Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
+#endif
             } else {
                 Gtk::HBox *space = manage (new Gtk::HBox);
                 space->set_size_request (SPACE_SIZE_X, SPACE_SIZE_Y);
+#if WITH_GTKMM_3_0
+                space->set_halign(Gtk::ALIGN_CENTER);
+                space->set_valign(Gtk::ALIGN_CENTER);
+                table.attach(*space, 0, r, 1, 1);
+#else
                 table.attach (*space, 0, 1, r, r+1,
                               (Gtk::AttachOptions)0, (Gtk::AttachOptions)0,0,0);
+#endif
             }
         }
         ++r;
@@ -306,14 +347,17 @@ CanvasAxonomGrid::onReprAttrChanged(Inkscape::XML::Node */*repr*/, gchar const *
         updateWidgets();
 }
 
-
-
-
 Gtk::Widget *
 CanvasAxonomGrid::newSpecificWidget()
 {
+#if WITH_GTKMM_3_0
+    Gtk::Grid *table = Gtk::manage(new Gtk::Grid());
+    table->set_row_spacing(2);
+    table->set_column_spacing(2);
+#else
     Gtk::Table * table = Gtk::manage( new Gtk::Table(1,1) );
     table->set_spacings(2);
+#endif
 
 _wr.setUpdating (true);
 
diff --git a/src/display/canvas-grid.cpp b/src/display/canvas-grid.cpp
index 51a6dd89b..c53890f9f 100644
--- a/src/display/canvas-grid.cpp
+++ b/src/display/canvas-grid.cpp
@@ -13,10 +13,19 @@
  * Don't be shy to correct things.
  */
 
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <glibmm/i18n.h>
 #include <gtkmm/box.h>
 #include <gtkmm/label.h>
-#include <gtkmm/table.h>
+
+#if WITH_GTKMM_3_0
+# include <gtkmm/grid.h>
+#else
+# include <gtkmm/table.h>
+#endif
 
 #include "ui/widget/registered-widget.h"
 #include "desktop.h"
@@ -410,29 +419,60 @@ void CanvasGrid::setOrigin(Geom::Point const &origin_px)
 **/
 #define SPACE_SIZE_X 15
 #define SPACE_SIZE_Y 10
-static inline void
-attach_all(Gtk::Table &table, Gtk::Widget const *const arr[], unsigned size, int start = 0)
+#if WITH_GTKMM_3_0
+static inline void attach_all(Gtk::Grid &table, Gtk::Widget const *const arr[], unsigned size, int start = 0)
+#else
+static inline void attach_all(Gtk::Table &table, Gtk::Widget const *const arr[], unsigned size, int start = 0)
+#endif
 {
     for (unsigned i=0, r=start; i<size/sizeof(Gtk::Widget*); i+=2) {
         if (arr[i] && arr[i+1]) {
+#if WITH_GTKMM_3_0
+            (const_cast<Gtk::Widget&>(*arr[i])).set_hexpand();
+            (const_cast<Gtk::Widget&>(*arr[i])).set_valign(Gtk::ALIGN_CENTER);
+            table.attach(const_cast<Gtk::Widget&>(*arr[i]),   1, r, 1, 1);
+
+            (const_cast<Gtk::Widget&>(*arr[i+1])).set_hexpand();
+            (const_cast<Gtk::Widget&>(*arr[i+1])).set_valign(Gtk::ALIGN_CENTER);
+            table.attach(const_cast<Gtk::Widget&>(*arr[i+1]), 2, r, 1, 1);
+#else
             table.attach (const_cast<Gtk::Widget&>(*arr[i]),   1, 2, r, r+1,
                           Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
             table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 2, 3, r, r+1,
                           Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
+#endif
         } else {
             if (arr[i+1]) {
+#if WITH_GTKMM_3_0
+                (const_cast<Gtk::Widget&>(*arr[i+1])).set_hexpand();
+                (const_cast<Gtk::Widget&>(*arr[i+1])).set_valign(Gtk::ALIGN_CENTER);
+                table.attach(const_cast<Gtk::Widget&>(*arr[i+1]), 1, r, 2, 1);
+#else
                 table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 1, 3, r, r+1,
                               Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
+#endif
             } else if (arr[i]) {
                 Gtk::Label& label = reinterpret_cast<Gtk::Label&> (const_cast<Gtk::Widget&>(*arr[i]));
                 label.set_alignment (0.0);
+#if WITH_GTKMM_3_0
+                label.set_hexpand();
+                label.set_valign(Gtk::ALIGN_CENTER);
+                table.attach(label, 0, r, 3, 1);
+#else
                 table.attach (label, 0, 3, r, r+1,
                               Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
+#endif
             } else {
                 Gtk::HBox *space = manage (new Gtk::HBox);
                 space->set_size_request (SPACE_SIZE_X, SPACE_SIZE_Y);
+#if WITH_GTKMM_3_0
+                space->set_halign(Gtk::ALIGN_CENTER);
+                space->set_valign(Gtk::ALIGN_CENTER);
+                table.attach(*space, 0, r, 1, 1);
+#else
                 table.attach (*space, 0, 1, r, r+1,
                               (Gtk::AttachOptions)0, (Gtk::AttachOptions)0,0,0);
+#endif
             }
         }
         ++r;
@@ -688,7 +728,14 @@ CanvasXYGrid::onReprAttrChanged(Inkscape::XML::Node */*repr*/, gchar const */*ke
 Gtk::Widget *
 CanvasXYGrid::newSpecificWidget()
 {
+#if WITH_GTKMM_3_0
+    Gtk::Grid * table = Gtk::manage( new Gtk::Grid() );
+    table->set_row_spacing(2);
+    table->set_column_spacing(2);
+#else
     Gtk::Table * table = Gtk::manage( new Gtk::Table(1,1) );
+    table->set_spacings(2);
+#endif
 
     Inkscape::UI::Widget::RegisteredUnitMenu *_rumg = Gtk::manage( new Inkscape::UI::Widget::RegisteredUnitMenu(
             _("Grid _units:"), "units", _wr, repr, doc) );
@@ -715,9 +762,7 @@ CanvasXYGrid::newSpecificWidget()
     Inkscape::UI::Widget::RegisteredSuffixedInteger *_rsi = Gtk::manage( new Inkscape::UI::Widget::RegisteredSuffixedInteger(
             _("_Major grid line every:"), "", _("lines"), "empspacing", _wr, repr, doc) );
 
-    table->set_spacings(2);
-
-_wr.setUpdating (true);
+    _wr.setUpdating (true);
 
     _rsu_ox->setDigits(5);
     _rsu_ox->setIncrements(0.1, 1.0);
diff --git a/src/dom/io/domstream.cpp b/src/dom/io/domstream.cpp
index b9ff7e9d2..7118025d6 100644
--- a/src/dom/io/domstream.cpp
+++ b/src/dom/io/domstream.cpp
@@ -66,7 +66,7 @@ void pipeStream(InputStream &source, OutputStream &dest)
         }
     dest.flush();
 }
-
+/*
 
 
 //#########################################################################
@@ -74,11 +74,11 @@ void pipeStream(InputStream &source, OutputStream &dest)
 //#########################################################################
 
 static char const *digits = "0123456789abcdefghijklmnopqrstuvwxyz";
-
-static int dprintInt(Writer &outs,
-                     long arg, int base,
-                     int flag, int width, int /*precision*/)
-{
+*/
+// static int dprintInt(Writer &outs,
+                     // long arg, int base,
+                     // int flag, int width, int /*precision*/)
+/*{
 
     DOMString buf;
 
@@ -209,7 +209,7 @@ static int dprintDouble(Writer &outs, double val,
         }
     return 1;
 }
-
+*/
 
 /**
  * Output a string.  We veer from the standard a tiny bit.
@@ -217,9 +217,9 @@ static int dprintDouble(Writer &outs, double val,
  * it as an indicator that the user wants to XML-escape any
  * XML entities.
  */
-static int dprintString(Writer &outs, const DOMString &str,
-                        int flags, int /*width*/, int /*precision*/)
-{
+// static int dprintString(Writer &outs, const DOMString &str,
+                        // int flags, int /*width*/, int /*precision*/)
+/*{
     int len = str.size();
     if (flags == '#')
         {
@@ -418,7 +418,7 @@ static int dprintf(Writer &outs, const DOMString &fmt, va_list ap)
 
     return 1;
 }
-
+*/
 
 //#########################################################################
 //# B A S I C    I N P U T    S T R E A M
@@ -514,7 +514,7 @@ int BasicOutputStream::put(gunichar ch)
     if (closed)
         return -1;
     destination.put(ch);
-	return 1;
+    return 1;
 }
 
 
@@ -811,38 +811,37 @@ gunichar StdReader::get()
 //#########################################################################
 //# B A S I C    W R I T E R
 //#########################################################################
-
 /**
  *
- */
+ */ 
 BasicWriter::BasicWriter(const Writer &destinationWriter)
 {
-    destination = (Writer *)&destinationWriter;
+    destination = (Writer*) &destinationWriter;
 }
 
 /**
  * Closes this writer and releases any system resources
  * associated with this writer.
- */
+ */ 
 void BasicWriter::close()
 {
     if (destination)
         destination->close();
 }
-
+    
 /**
  *  Flushes this output stream and forces any buffered output
  *  bytes to be written out.
- */
+ */ 
 void BasicWriter::flush()
 {
     if (destination)
         destination->flush();
 }
-
+    
 /**
  * Writes the specified byte to this output writer.
- */
+ */ 
 int BasicWriter::put(gunichar ch)
 {
     if (destination && destination->put(ch)>=0)
@@ -852,50 +851,66 @@ int BasicWriter::put(gunichar ch)
 
 /**
  * Provide printf()-like formatting
- */
-/*
+ */ 
 Writer &BasicWriter::printf(char const *fmt, ...)
 {
     va_list args;
     va_start(args, fmt);
-    //replace this wish vsnprintf()
-    vsnprintf(formatBuf, 2047, fmt, args);
+    gchar *buf = g_strdup_vprintf(fmt, args);
     va_end(args);
-    writeString(formatBuf);
-
-    return *this;
-}
-*/
-Writer &BasicWriter::printf(const DOMString &fmt, ...)
-{
-    va_list args;
-    va_start(args, fmt);
-    dprintf(*this, fmt, args);
+    if (buf) {
+        writeString(buf);
+        g_free(buf);
+    }
     return *this;
 }
-
-
 /**
  * Writes the specified character to this output writer.
- */
+ */ 
 Writer &BasicWriter::writeChar(char ch)
 {
-    XMLCh uch = ch;
+    gunichar uch = ch;
     put(uch);
     return *this;
 }
 
 
 /**
- * Writes the specified standard string to this output writer.
- */
-Writer &BasicWriter::writeString(const DOMString &str)
+ * Writes the specified unicode string to this output writer.
+ */ 
+Writer &BasicWriter::writeUString(Glib::ustring &str)
 {
     for (int i=0; i< (int)str.size(); i++)
         put(str[i]);
     return *this;
 }
 
+/**
+ * Writes the specified standard string to this output writer.
+ */ 
+Writer &BasicWriter::writeStdString(std::string &str)
+{
+    Glib::ustring tmp(str);
+    writeUString(tmp);
+    return *this;
+}
+
+/**
+ * Writes the specified character string to this output writer.
+ */ 
+Writer &BasicWriter::writeString(const char *str)
+{
+    Glib::ustring tmp;
+    if (str)
+        tmp = str;
+    else
+        tmp = "null";
+    writeUString(tmp);
+    return *this;
+}
+
+
+
 
 /**
  *
@@ -915,10 +930,12 @@ Writer &BasicWriter::writeBool (bool val )
  */
 Writer &BasicWriter::writeShort (short val )
 {
-    char buf[32];
-    snprintf(buf, 31, "%d", val);
-    writeString(buf);
-    return *this;
+    gchar *buf = g_strdup_printf("%d", val);
+    if (buf) {
+        writeString(buf);
+        g_free(buf);
+    }
+  return *this;
 }
 
 
@@ -928,9 +945,11 @@ Writer &BasicWriter::writeShort (short val )
  */
 Writer &BasicWriter::writeUnsignedShort (unsigned short val )
 {
-    char buf[32];
-    snprintf(buf, 31, "%u", val);
-    writeString(buf);
+    gchar *buf = g_strdup_printf("%u", val);
+    if (buf) {
+        writeString(buf);
+        g_free(buf);
+    }
     return *this;
 }
 
@@ -939,9 +958,11 @@ Writer &BasicWriter::writeUnsignedShort (unsigned short val )
  */
 Writer &BasicWriter::writeInt (int val)
 {
-    char buf[32];
-    snprintf(buf, 31, "%d", val);
-    writeString(buf);
+    gchar *buf = g_strdup_printf("%d", val);
+    if (buf) {
+        writeString(buf);
+        g_free(buf);
+    }
     return *this;
 }
 
@@ -950,9 +971,11 @@ Writer &BasicWriter::writeInt (int val)
  */
 Writer &BasicWriter::writeUnsignedInt (unsigned int val)
 {
-    char buf[32];
-    snprintf(buf, 31, "%u", val);
-    writeString(buf);
+    gchar *buf = g_strdup_printf("%u", val);
+    if (buf) {
+        writeString(buf);
+        g_free(buf);
+    }
     return *this;
 }
 
@@ -961,9 +984,11 @@ Writer &BasicWriter::writeUnsignedInt (unsigned int val)
  */
 Writer &BasicWriter::writeLong (long val)
 {
-    char buf[32];
-    snprintf(buf, 31, "%ld", val);
-    writeString(buf);
+    gchar *buf = g_strdup_printf("%ld", val);
+    if (buf) {
+        writeString(buf);
+        g_free(buf);
+    }
     return *this;
 }
 
@@ -972,9 +997,11 @@ Writer &BasicWriter::writeLong (long val)
  */
 Writer &BasicWriter::writeUnsignedLong(unsigned long val)
 {
-    char buf[32];
-    snprintf(buf, 31, "%lu", val);
-    writeString(buf);
+    gchar *buf = g_strdup_printf("%lu", val);
+    if (buf) {
+        writeString(buf);
+        g_free(buf);
+    }
     return *this;
 }
 
@@ -983,9 +1010,16 @@ Writer &BasicWriter::writeUnsignedLong(unsigned long val)
  */
 Writer &BasicWriter::writeFloat(float val)
 {
-    char buf[32];
-    snprintf(buf, 31, "%8.3f", val);
-    writeString(buf);
+#if 1
+    gchar *buf = g_strdup_printf("%8.3f", val);
+    if (buf) {
+        writeString(buf);
+        g_free(buf);
+    }
+#else
+    std::string tmp = ftos(val, 'g', 8, 3, 0);
+    writeStdString(tmp);
+#endif
     return *this;
 }
 
@@ -994,9 +1028,16 @@ Writer &BasicWriter::writeFloat(float val)
  */
 Writer &BasicWriter::writeDouble(double val)
 {
-    char buf[32];
-    snprintf(buf, 31, "%8.3f", val);
-    writeString(buf);
+#if 1
+    gchar *buf = g_strdup_printf("%8.3f", val);
+    if (buf) {
+        writeString(buf);
+        g_free(buf);
+    }
+#else
+    std::string tmp = ftos(val, 'g', 8, 3, 0);
+    writeStdString(tmp);
+#endif
     return *this;
 }
 
@@ -1013,7 +1054,7 @@ OutputStreamWriter::OutputStreamWriter(OutputStream &outputStreamDest)
 {
 }
 
-
+    
 
 /**
  *  Close the underlying OutputStream
@@ -1023,7 +1064,7 @@ void OutputStreamWriter::close()
     flush();
     outputStream.close();
 }
-
+    
 /**
  *  Flush the underlying OutputStream
  */
@@ -1031,18 +1072,16 @@ void OutputStreamWriter::flush()
 {
       outputStream.flush();
 }
-
+    
 /**
  *  Overloaded to redirect the output chars from the next Writer
  *  in the chain to an OutputStream instead.
  */
 int OutputStreamWriter::put(gunichar ch)
 {
-    //Do we need conversions here?
-    int intCh = (int) ch;
-    if (outputStream.put(intCh) < 0)
-        return -1;
-    return 1;
+    if (outputStream.put(ch)>=0)
+        return 1;
+    return -1;
 }
 
 //#########################################################################
@@ -1051,24 +1090,21 @@ int OutputStreamWriter::put(gunichar ch)
 
 
 /**
- *
+ *  
  */
 StdWriter::StdWriter()
 {
     outputStream = new StdOutputStream();
 }
-
-
+    
 /**
- *
+ *  
  */
 StdWriter::~StdWriter()
 {
     delete outputStream;
 }
 
-
-
 /**
  *  Close the underlying OutputStream
  */
@@ -1077,7 +1113,7 @@ void StdWriter::close()
     flush();
     outputStream->close();
 }
-
+    
 /**
  *  Flush the underlying OutputStream
  */
@@ -1085,23 +1121,20 @@ void StdWriter::flush()
 {
       outputStream->flush();
 }
-
+    
 /**
  *  Overloaded to redirect the output chars from the next Writer
  *  in the chain to an OutputStream instead.
  */
 int StdWriter::put(gunichar ch)
 {
-    //Do we need conversions here?
-    if (outputStream->put(ch) < 0)
-        return -1;
-    return 1;
+    if (outputStream && (outputStream->put(ch)>=0))
+        return 1;
+    return -1;
 }
 
 
 
-
-
 //###############################################
 //# O P E R A T O R S
 //###############################################
@@ -1144,11 +1177,16 @@ const Reader& operator>> (Reader &reader, double &val)
 
 
 
-
 Writer& operator<< (Writer &writer, char val)
     { return writer.writeChar(val); }
 
-Writer& operator<< (Writer &writer, const DOMString &val)
+Writer& operator<< (Writer &writer, Glib::ustring &val)
+    { return writer.writeUString(val); }
+
+Writer& operator<< (Writer &writer, std::string &val)
+    { return writer.writeStdString(val); }
+
+Writer& operator<< (Writer &writer, char const *val)
     { return writer.writeString(val); }
 
 Writer& operator<< (Writer &writer, bool val)
@@ -1178,8 +1216,6 @@ Writer& operator<< (Writer &writer, float val)
 Writer& operator<< (Writer &writer, double val)
     { return writer.writeDouble(val); }
 
-
-
 }  //namespace io
 }  //namespace dom
 }  //namespace w3c
diff --git a/src/dom/io/domstream.h b/src/dom/io/domstream.h
index a021676fa..edd180b83 100644
--- a/src/dom/io/domstream.h
+++ b/src/dom/io/domstream.h
@@ -490,17 +490,21 @@ public:
     virtual ~Writer() {}
 
     virtual void close() = 0;
-
+    
     virtual void flush() = 0;
-
+    
     virtual int put(gunichar ch) = 0;
-
+    
     /* Formatted output */
-    virtual Writer& printf(const DOMString &fmt, ...) = 0;
+    virtual Writer& printf(char const *fmt, ...) G_GNUC_PRINTF(2,3) = 0;
 
     virtual Writer& writeChar(char val) = 0;
 
-    virtual Writer& writeString(const DOMString &val) = 0;
+    virtual Writer& writeUString(Glib::ustring &val) = 0;
+
+    virtual Writer& writeStdString(std::string &val) = 0;
+
+    virtual Writer& writeString(const char *str) = 0;
 
     virtual Writer& writeBool (bool val ) = 0;
 
@@ -520,7 +524,7 @@ public:
 
     virtual Writer& writeDouble (double val ) = 0;
 
-
+ 
 
 }; // interface Writer
 
@@ -540,19 +544,23 @@ public:
 
     /*Overload these 3 for your implementation*/
     virtual void close();
-
+    
     virtual void flush();
-
+    
     virtual int put(gunichar ch);
-
-
-
+    
+    
+    
     /* Formatted output */
-    virtual Writer &printf(const DOMString &fmt, ...);
+    virtual Writer &printf(char const *fmt, ...) G_GNUC_PRINTF(2,3);
 
     virtual Writer& writeChar(char val);
 
-    virtual Writer& writeString(const DOMString &val);
+    virtual Writer& writeUString(Glib::ustring &val);
+
+    virtual Writer& writeStdString(std::string &val);
+
+    virtual Writer& writeString(const char *str);
 
     virtual Writer& writeBool (bool val );
 
@@ -572,33 +580,26 @@ public:
 
     virtual Writer& writeDouble (double val );
 
-
+ 
 protected:
 
     Writer *destination;
 
     BasicWriter()
-        {
-            destination = NULL;
-            for(int k=0;k<2048;++k)
-            {
-                formatBuf[k]=0;
-            }
-        }
-
-    //Used for printf() or other things that might
-    //require formatting before sending down the stream
-    char formatBuf[2048];
-
+        { destination = NULL; }
+    
 private:
 
 }; // class BasicWriter
 
 
-
 Writer& operator<< (Writer &writer, char val);
 
-Writer& operator<< (Writer &writer, const DOMString &val);
+Writer& operator<< (Writer &writer, Glib::ustring &val);
+
+Writer& operator<< (Writer &writer, std::string &val);
+
+Writer& operator<< (Writer &writer, char const *val);
 
 Writer& operator<< (Writer &writer, bool val);
 
@@ -619,8 +620,6 @@ Writer& operator<< (Writer &writer, float val);
 Writer& operator<< (Writer &writer, double val);
 
 
-
-
 /**
  * Class for placing a Writer on an open OutputStream
  *
@@ -630,12 +629,10 @@ class OutputStreamWriter : public BasicWriter
 public:
 
     OutputStreamWriter(OutputStream &outputStreamDest);
-
+    
     /*Overload these 3 for your implementation*/
     virtual void close();
-
     virtual void flush();
-
     virtual int put(gunichar ch);
 
 
@@ -656,14 +653,8 @@ public:
     StdWriter();
 
     virtual ~StdWriter();
-
-
     virtual void close();
-
-
     virtual void flush();
-
-
     virtual int put(gunichar ch);
 
 
@@ -680,7 +671,6 @@ private:
 void pipeStream(InputStream &source, OutputStream &dest);
 
 
-
 }  //namespace io
 }  //namespace dom
 }  //namespace w3c
diff --git a/src/extension/error-file.cpp b/src/extension/error-file.cpp
index 2a56f55e8..778295f47 100644
--- a/src/extension/error-file.cpp
+++ b/src/extension/error-file.cpp
@@ -56,7 +56,11 @@ ErrorFileNotice::ErrorFileNotice (void) :
     g_free(ext_error_file);
     set_message(dialog_text, true);
 
+#if WITH_GTKMM_3_0
+    Gtk::Box * vbox = get_content_area();
+#else
     Gtk::Box * vbox = get_vbox();
+#endif
 
     /* This is some filler text, needs to change before relase */
     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
diff --git a/src/extension/extension.cpp b/src/extension/extension.cpp
index 4e2c5b9e4..28f556e75 100644
--- a/src/extension/extension.cpp
+++ b/src/extension/extension.cpp
@@ -19,12 +19,16 @@
 # include "config.h"
 #endif
 
-
 #include <glibmm/i18n.h>
 #include <gtkmm/box.h>
 #include <gtkmm/label.h>
 #include <gtkmm/frame.h>
-#include <gtkmm/table.h>
+
+#if WITH_GTKMM_3_0
+# include <gtkmm/grid.h>
+#else
+# include <gtkmm/table.h>
+#endif
 
 #include "inkscape.h"
 #include "extension/implementation/implementation.h"
@@ -720,7 +724,12 @@ Extension::get_info_widget(void)
     Gtk::Frame * info = Gtk::manage(new Gtk::Frame("General Extension Information"));
     retval->pack_start(*info, true, true, 5);
 
+#if WITH_GTKMM_3_0
+    Gtk::Grid * table = Gtk::manage(new Gtk::Grid());
+#else
     Gtk::Table * table = Gtk::manage(new Gtk::Table());
+#endif
+
     info->add(*table);
 
     int row = 0;
@@ -733,8 +742,11 @@ Extension::get_info_widget(void)
     return retval;
 }
 
-void
-Extension::add_val(Glib::ustring labelstr, Glib::ustring valuestr, Gtk::Table * table, int * row)
+#if WITH_GTKMM_3_0
+void Extension::add_val(Glib::ustring labelstr, Glib::ustring valuestr, Gtk::Grid * table, int * row)
+#else
+void Extension::add_val(Glib::ustring labelstr, Glib::ustring valuestr, Gtk::Table * table, int * row)
+#endif
 {
     Gtk::Label * label;
     Gtk::Label * value;
@@ -742,8 +754,14 @@ Extension::add_val(Glib::ustring labelstr, Glib::ustring valuestr, Gtk::Table *
     (*row)++; 
     label = Gtk::manage(new Gtk::Label(labelstr));
     value = Gtk::manage(new Gtk::Label(valuestr));
+
+#if WITH_GTKMM_3_0
+    table->attach(*label, 0, (*row) - 1, 1, 1);
+    table->attach(*value, 1, (*row) - 1, 1, 1);
+#else
     table->attach(*label, 0, 1, (*row) - 1, *row);
     table->attach(*value, 1, 2, (*row) - 1, *row);
+#endif
 
     label->show();
     value->show();
diff --git a/src/extension/extension.h b/src/extension/extension.h
index 78999631a..dcabb3df7 100644
--- a/src/extension/extension.h
+++ b/src/extension/extension.h
@@ -22,7 +22,12 @@
 #include <sigc++/signal.h>
 
 namespace Gtk {
+#if WITH_GTKMM_3_0
+	class Grid;
+#else
 	class Table;
+#endif
+
 	class VBox;
 	class Widget;
 }
@@ -285,8 +290,11 @@ public:
     Gtk::VBox *    get_help_widget(void);
     Gtk::VBox *    get_params_widget(void);
 protected:
+#if WITH_GTKMM_3_0
+    inline static void add_val(Glib::ustring labelstr, Glib::ustring valuestr, Gtk::Grid * table, int * row);
+#else
     inline static void add_val(Glib::ustring labelstr, Glib::ustring valuestr, Gtk::Table * table, int * row);
-
+#endif
 };
 
 
diff --git a/src/extension/implementation/script.cpp b/src/extension/implementation/script.cpp
index fa46569e2..3ac1e06ab 100644
--- a/src/extension/implementation/script.cpp
+++ b/src/extension/implementation/script.cpp
@@ -854,7 +854,11 @@ void Script::checkStderr (const Glib::ustring &data,
     GtkWidget *dlg = GTK_WIDGET(warning.gobj());
     sp_transientize(dlg);
 
+#if WITH_GTKMM_3_0
+    Gtk::Box * vbox = warning.get_content_area();
+#else
     Gtk::Box * vbox = warning.get_vbox();
+#endif
 
     /* Gtk::TextView * textview = new Gtk::TextView(Gtk::TextBuffer::create()); */
     Gtk::TextView * textview = new Gtk::TextView();
diff --git a/src/extension/internal/odf.cpp b/src/extension/internal/odf.cpp
index bd74ba47c..7634c7aa1 100644
--- a/src/extension/internal/odf.cpp
+++ b/src/extension/internal/odf.cpp
@@ -15,8 +15,10 @@
  * Authors:
  *   Bob Jamison
  *   Abhishek Sharma
+ *   Kris De Gussem
  *
  * Copyright (C) 2006, 2007 Bob Jamison
+ * Copyright (C) 2013 Kris De Gussem
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
@@ -1180,7 +1182,7 @@ bool OdfOutput::writeManifest(ZipFile &zf)
         else if (ext == ".jpg")
             outs.printf("image/jpeg");
         outs.printf("\" manifest:full-path=\"");
-        outs.printf(newName.c_str());
+        outs.writeString(newName.c_str());
         outs.printf("\"/>\n");
         }
     outs.printf("</manifest:manifest>\n");
@@ -1241,7 +1243,7 @@ bool OdfOutput::writeMeta(ZipFile &zf)
     outs.printf("office:version=\"1.0\">\n");
     outs.printf("<office:meta>\n");
     Glib::ustring tmp = Glib::ustring("    <meta:generator>Inkscape.org - ") + Inkscape::version_string + "</meta:generator>\n";
-    outs.writeString(tmp);
+    outs.writeUString(tmp);
     outs.printf("    <meta:initial-creator>%#s</meta:initial-creator>\n",
                                   creator.c_str());
     outs.printf("    <meta:creation-date>%#s</meta:creation-date>\n", date.c_str());
@@ -1889,35 +1891,47 @@ bool OdfOutput::writeTree(Writer &couts, Writer &souts,
 
 
     if (nodeName == "svg" || nodeName == "svg:svg")
-        {
+    {
         //# Iterate through the children
         for (Inkscape::XML::Node *child = node->firstChild() ;
                child ; child = child->next())
-            {
+        {
             if (!writeTree(couts, souts, child))
+            {
                 return false;
             }
-        return true;
         }
+        return true;
+    }
     else if (nodeName == "g" || nodeName == "svg:g")
+    {
+        if (!id.empty())
         {
-        if (id.size() > 0)
             couts.printf("<draw:g id=\"%s\">\n", id.c_str());
+        }
         else
+        {
             couts.printf("<draw:g>\n");
+        }
         //# Iterate through the children
         for (Inkscape::XML::Node *child = node->firstChild() ;
                child ; child = child->next())
-            {
+        {
             if (!writeTree(couts, souts, child))
+            {
                 return false;
             }
-        if (id.size() > 0)
+        }
+        if (!id.empty())
+        {
             couts.printf("</draw:g> <!-- id=\"%s\" -->\n", id.c_str());
+        }
         else
+        {
             couts.printf("</draw:g>\n");
-        return true;
         }
+        return true;
+    }
 
     //######################################
     //# S T Y L E
@@ -1930,19 +1944,17 @@ bool OdfOutput::writeTree(Writer &couts, Writer &souts,
     processGradient(souts, item, id, tf);
 
 
-
-
     //######################################
     //# I T E M    D A T A
     //######################################
     //g_message("##### %s #####", nodeName.c_str());
     if (nodeName == "image" || nodeName == "svg:image")
-        {
+    {
         if (!SP_IS_IMAGE(item))
-            {
+        {
             g_warning("<image> is not an SPImage.  Why?  ;-)");
             return false;
-            }
+        }
 
         SPImage *img   = SP_IMAGE(item);
         double ix      = img->x.value;
@@ -1954,8 +1966,6 @@ bool OdfOutput::writeTree(Writer &couts, Writer &souts,
         ibbox = ibbox * tf;
         ix      = ibbox.min()[Geom::X];
         iy      = ibbox.min()[Geom::Y];
-        //iwidth  = ibbox.max()[Geom::X] - ibbox.min()[Geom::X];
-        //iheight = ibbox.max()[Geom::Y] - ibbox.min()[Geom::Y];
         iwidth  = xscale * iwidth;
         iheight = yscale * iheight;
 
@@ -1966,29 +1976,30 @@ bool OdfOutput::writeTree(Writer &couts, Writer &souts,
         Glib::ustring href = getAttribute(node, "xlink:href");
         std::map<Glib::ustring, Glib::ustring>::iterator iter = imageTable.find(href);
         if (iter == imageTable.end())
-            {
+        {
             g_warning("image '%s' not in table", href.c_str());
             return false;
-            }
+        }
         Glib::ustring newName = iter->second;
 
         couts.printf("<draw:frame ");
-        if (id.size() > 0)
+        if (!id.empty())
+        {
             couts.printf("id=\"%s\" ", id.c_str());
+        }
         couts.printf("draw:style-name=\"gr1\" draw:text-style-name=\"P1\" draw:layer=\"layout\" ");
         //no x or y.  make them the translate transform, last one
         couts.printf("svg:width=\"%.3fcm\" svg:height=\"%.3fcm\" ",
                                   iwidth, iheight);
-        if (itemTransformString.size() > 0)
-            {
+        if (!itemTransformString.empty())
+        {
             couts.printf("draw:transform=\"%s translate(%.3fcm, %.3fcm)\" ",
                            itemTransformString.c_str(), ix, iy);
-            }
+        }
         else
-            {
-            couts.printf("draw:transform=\"translate(%.3fcm, %.3fcm)\" ",
-                                ix, iy);
-            }
+        {
+            couts.printf("draw:transform=\"translate(%.3fcm, %.3fcm)\" ", ix, iy);
+        }
 
         couts.printf(">\n");
         couts.printf("    <draw:image xlink:href=\"%s\" xlink:type=\"simple\"\n",
@@ -1998,41 +2009,41 @@ bool OdfOutput::writeTree(Writer &couts, Writer &souts,
         couts.printf("    </draw:image>\n");
         couts.printf("</draw:frame>\n");
         return true;
-        }
+    }
     else if (SP_IS_SHAPE(item))
-        {
-        //g_message("### %s is a shape", nodeName.c_str());
+    {
         curve = SP_SHAPE(item)->getCurve();
-        }
+    }
     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))
-        {
+    {
         curve = te_get_layout(item)->convertToCurves();
-        }
+    }
 
     if (curve)
-        {
+    {
         //### Default <path> output
-
         couts.printf("<draw:path ");
-        if (id.size()>0)
+        if (!id.empty())
+        {
             couts.printf("id=\"%s\" ", id.c_str());
+        }
 
         std::map<Glib::ustring, Glib::ustring>::iterator siter;
         siter = styleLookupTable.find(id);
         if (siter != styleLookupTable.end())
-            {
+        {
             Glib::ustring styleName = siter->second;
             couts.printf("draw:style-name=\"%s\" ", styleName.c_str());
-            }
+        }
 
         std::map<Glib::ustring, Glib::ustring>::iterator giter;
         giter = gradientLookupTable.find(id);
         if (giter != gradientLookupTable.end())
-            {
+        {
             Glib::ustring gradientName = giter->second;
             couts.printf("draw:fill-gradient-name=\"%s\" ",
                  gradientName.c_str());
-            }
+        }
 
         couts.printf("draw:layer=\"layout\" svg:x=\"%.3fcm\" svg:y=\"%.3fcm\" ",
                        bbox_x, bbox_y);
@@ -2052,7 +2063,7 @@ bool OdfOutput::writeTree(Writer &couts, Writer &souts,
 
 
         curve->unref();
-        }
+    }
 
     return true;
 }
@@ -2304,29 +2315,40 @@ bool OdfOutput::writeContent(ZipFile &zf, Inkscape::XML::Node *node)
     OutputStreamWriter couts(cbouts);
 
     if (!writeContentHeader(couts))
+    {
         return false;
+    }
 
     //Style.xml stream
     BufferOutputStream sbouts;
     OutputStreamWriter souts(sbouts);
 
     if (!writeStyleHeader(souts))
+    {
         return false;
-
+    }
 
     //# Descend into the tree, doing all of our conversions
-    //# to both files as the same time
+    //# to both files at the same time
+    char *oldlocale = g_strdup (setlocale (LC_NUMERIC, NULL));
+    setlocale (LC_NUMERIC, "C");
     if (!writeTree(couts, souts, node))
-        {
+    {
         g_warning("Failed to convert SVG tree");
+        setlocale (LC_NUMERIC, oldlocale);
+        g_free (oldlocale);
         return false;
-        }
+    }
+    setlocale (LC_NUMERIC, oldlocale);
+    g_free (oldlocale);
 
 
 
     //# Finish content file
     if (!writeContentFooter(couts))
+    {
         return false;
+    }
 
     ZipEntry *ze = zf.newEntry("content.xml", "ODF master content file");
     ze->setUncompressedData(cbouts.getBuffer());
@@ -2336,7 +2358,9 @@ bool OdfOutput::writeContent(ZipFile &zf, Inkscape::XML::Node *node)
 
     //# Finish style file
     if (!writeStyleFooter(souts))
+    {
         return false;
+    }
 
     ze = zf.newEntry("styles.xml", "ODF style file");
     ze->setUncompressedData(sbouts.getBuffer());
diff --git a/src/extension/internal/pdf-input-cairo.cpp b/src/extension/internal/pdf-input-cairo.cpp
index d3c6c5931..c83ebad82 100644
--- a/src/extension/internal/pdf-input-cairo.cpp
+++ b/src/extension/internal/pdf-input-cairo.cpp
@@ -224,9 +224,17 @@ PdfImportCairoDialog::PdfImportCairoDialog(PopplerDocument *doc)
     vbox1->pack_start(*_importSettingsFrame, Gtk::PACK_EXPAND_PADDING, 0);
     hbox1->pack_start(*vbox1);
     hbox1->pack_start(*_previewArea, Gtk::PACK_EXPAND_WIDGET, 4);
+
+#if WITH_GTKMM_3_0
+    get_content_area()->set_homogeneous(false);
+    get_content_area()->set_spacing(0);
+    get_content_area()->pack_start(*hbox1);
+#else
     this->get_vbox()->set_homogeneous(false);
     this->get_vbox()->set_spacing(0);
     this->get_vbox()->pack_start(*hbox1);
+#endif
+
     this->set_title(_("PDF Import Settings"));
     this->set_modal(true);
     sp_transientize(GTK_WIDGET(this->gobj()));  //Make transient
diff --git a/src/extension/internal/pdfinput/pdf-input.cpp b/src/extension/internal/pdfinput/pdf-input.cpp
index 535deafce..531cda20a 100644
--- a/src/extension/internal/pdfinput/pdf-input.cpp
+++ b/src/extension/internal/pdfinput/pdf-input.cpp
@@ -240,9 +240,17 @@ PdfImportDialog::PdfImportDialog(PDFDoc *doc, const gchar */*uri*/)
     vbox1->pack_start(*_importSettingsFrame, Gtk::PACK_EXPAND_PADDING, 0);
     hbox1->pack_start(*vbox1);
     hbox1->pack_start(*_previewArea, Gtk::PACK_EXPAND_WIDGET, 4);
+
+#if WITH_GTKMM_3_0
+    get_content_area()->set_homogeneous(false);
+    get_content_area()->set_spacing(0);
+    get_content_area()->pack_start(*hbox1);
+#else
     this->get_vbox()->set_homogeneous(false);
     this->get_vbox()->set_spacing(0);
     this->get_vbox()->pack_start(*hbox1);
+#endif
+
     this->set_title(_("PDF Import Settings"));
     this->set_modal(true);
     sp_transientize(GTK_WIDGET(this->gobj()));  //Make transient
diff --git a/src/extension/prefdialog.cpp b/src/extension/prefdialog.cpp
index 649dc398a..f3c6508af 100644
--- a/src/extension/prefdialog.cpp
+++ b/src/extension/prefdialog.cpp
@@ -67,7 +67,12 @@ PrefDialog::PrefDialog (Glib::ustring name, gchar const * help, Gtk::Widget * co
 
     hbox->pack_start(*controls, true, true, 6);
     hbox->show();
+
+#if WITH_GTKMM_3_0
+    this->get_content_area()->pack_start(*hbox, true, true, 6);
+#else
     this->get_vbox()->pack_start(*hbox, true, true, 6);
+#endif
 
     /*
     Gtk::Button * help_button = add_button(Gtk::Stock::HELP, Gtk::RESPONSE_HELP);
@@ -95,14 +100,24 @@ PrefDialog::PrefDialog (Glib::ustring name, gchar const * help, Gtk::Widget * co
 #endif
 
         sep->show();
+
+#if WITH_GTKMM_3_0
+        this->get_content_area()->pack_start(*sep, true, true, 4);
+#else
         this->get_vbox()->pack_start(*sep, true, true, 4);
+#endif
 
         hbox = Gtk::manage(new Gtk::HBox());
         _button_preview = _param_preview->get_widget(NULL, NULL, &_signal_preview);
         _button_preview->show();
         hbox->pack_start(*_button_preview, true, true,6);
         hbox->show();
+
+#if WITH_GTKMM_3_0
+        this->get_content_area()->pack_start(*hbox, true, true, 6);
+#else
         this->get_vbox()->pack_start(*hbox, true, true, 6);
+#endif
 
         Gtk::Box * hbox = dynamic_cast<Gtk::Box *>(_button_preview);
         if (hbox != NULL) {
diff --git a/src/io/inkscapestream.cpp b/src/io/inkscapestream.cpp
index 4c7fa4d49..dcfc662ca 100644
--- a/src/io/inkscapestream.cpp
+++ b/src/io/inkscapestream.cpp
@@ -130,7 +130,7 @@ int BasicOutputStream::put(gunichar ch)
     if (closed)
         return -1;
     destination.put(ch);
-	return 1;
+    return 1;
 }
 
 
diff --git a/src/libnrtype/FontFactory.cpp b/src/libnrtype/FontFactory.cpp
index a1a9ddc89..bb8b0887f 100644
--- a/src/libnrtype/FontFactory.cpp
+++ b/src/libnrtype/FontFactory.cpp
@@ -741,16 +741,23 @@ void font_factory::GetUIFamiliesAndStyles(FamilyToStylesMap *map)
                     continue;
                 }
 
-                // Disable synthesized (faux) font faces
-                if (pango_font_face_is_synthesized(faces[currentFace]) ) {
-                    continue;
-                } 
-
                 PangoFontDescription *faceDescr = pango_font_face_describe(faces[currentFace]);
                 if (faceDescr) {
                     Glib::ustring familyUIName = GetUIFamilyString(faceDescr);
                     Glib::ustring styleUIName = GetUIStyleString(faceDescr);
 
+                    // Disable synthesized (faux) font faces except for CSS generic faces
+                    if (pango_font_face_is_synthesized(faces[currentFace]) ) {
+                        if( familyUIName.compare( "sans-serif" ) != 0 &&
+                            familyUIName.compare( "serif"      ) != 0 &&
+                            familyUIName.compare( "monospace"  ) != 0 &&
+                            familyUIName.compare( "fantasy"    ) != 0 &&
+                            familyUIName.compare( "cursive"    ) != 0 ) {
+                            //std::cout << "faux: " << familyUIName << "  |  " << styleUIName << std::endl;
+                            continue;
+                        }
+                    } 
+
                     if (!familyUIName.empty() && !styleUIName.empty()) {
 
                         // Find the right place to put the style information, adding
diff --git a/src/libnrtype/font-lister.cpp b/src/libnrtype/font-lister.cpp
index 1e3ba01e9..712c17915 100644
--- a/src/libnrtype/font-lister.cpp
+++ b/src/libnrtype/font-lister.cpp
@@ -556,13 +556,13 @@ namespace Inkscape
       PangoWeight weight = pango_font_description_get_weight( desc );
       switch ( weight ) {
       case PANGO_WEIGHT_THIN:
-	sp_repr_css_set_property (css, "font-weight", "100" );
+	sp_repr_css_set_property (css, "font-weight", "thin" );
 	break;
       case PANGO_WEIGHT_ULTRALIGHT:
-	sp_repr_css_set_property (css, "font-weight", "200" );
+	sp_repr_css_set_property (css, "font-weight", "extra light" );
 	break;
       case PANGO_WEIGHT_LIGHT:
-	sp_repr_css_set_property (css, "font-weight", "300" );
+	sp_repr_css_set_property (css, "font-weight", "light" );
 	break;
       case PANGO_WEIGHT_BOOK:
 	sp_repr_css_set_property (css, "font-weight", "380" );
@@ -571,19 +571,19 @@ namespace Inkscape
 	sp_repr_css_set_property (css, "font-weight", "normal" );
 	break;
       case PANGO_WEIGHT_MEDIUM:
-	sp_repr_css_set_property (css, "font-weight", "500" );
+	sp_repr_css_set_property (css, "font-weight", "medium" );
 	break;
       case PANGO_WEIGHT_SEMIBOLD:
-	sp_repr_css_set_property (css, "font-weight", "600" );
+	sp_repr_css_set_property (css, "font-weight", "semi bold" );
 	break;
       case PANGO_WEIGHT_BOLD:
 	sp_repr_css_set_property (css, "font-weight", "bold" );
 	break;
       case PANGO_WEIGHT_ULTRABOLD:
-	sp_repr_css_set_property (css, "font-weight", "800" );
+	sp_repr_css_set_property (css, "font-weight", "extra bold" );
 	break;
       case PANGO_WEIGHT_HEAVY:
-	sp_repr_css_set_property (css, "font-weight", "900" );
+	sp_repr_css_set_property (css, "font-weight", "black" );
 	break;
       case PANGO_WEIGHT_ULTRAHEAVY:
 	sp_repr_css_set_property (css, "font-weight", "1000" );
diff --git a/src/ui/dialog/aboutbox.cpp b/src/ui/dialog/aboutbox.cpp
index 0c0027c15..d4928d25d 100644
--- a/src/ui/dialog/aboutbox.cpp
+++ b/src/ui/dialog/aboutbox.cpp
@@ -97,7 +97,12 @@ AboutBox::AboutBox() : Gtk::Dialog(_("About Inkscape")) {
     tabs->append_page(*manage(
         make_scrolled_text(license_text)), _("_License"), true);
 
+#if WITH_GTKMM_3_0
+    get_content_area()->pack_end(*manage(tabs), true, true);
+#else
     get_vbox()->pack_end(*manage(tabs), true, true);
+#endif
+
     tabs->show_all();
 
     add_button(Gtk::Stock::CLOSE, Gtk::RESPONSE_CLOSE);
@@ -114,7 +119,11 @@ AboutBox::AboutBox() : Gtk::Dialog(_("About Inkscape")) {
     label->set_selectable(true);
     label->show();
 
+#if WITH_GTKMM_3_0
+    get_content_area()->pack_start(*manage(label), false, false);
+#else
     get_vbox()->pack_start(*manage(label), false, false);
+#endif
 
     Gtk::Requisition requisition;
 #if GTK_CHECK_VERSION(3,0,0)
diff --git a/src/ui/dialog/calligraphic-profile-rename.cpp b/src/ui/dialog/calligraphic-profile-rename.cpp
index 77a4f4f03..9ae22db2d 100644
--- a/src/ui/dialog/calligraphic-profile-rename.cpp
+++ b/src/ui/dialog/calligraphic-profile-rename.cpp
@@ -13,14 +13,16 @@
  * Released under GNU GPL.  Read the file 'COPYING' for more information
  */
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
 #include "calligraphic-profile-rename.h"
 #include <glibmm/i18n.h>
 #include <gtkmm/stock.h>
 
+#if WITH_GTKMM_3_0
+# include <gtkmm/grid.h>
+#else
+# include <gtkmm/table.h>
+#endif
+
 #include "desktop.h"
 
 namespace Inkscape {
@@ -28,24 +30,42 @@ namespace UI {
 namespace Dialog {
 
 CalligraphicProfileRename::CalligraphicProfileRename() :
+#if WITH_GTKMM_3_0
+    _layout_table(Gtk::manage(new Gtk::Grid())),
+#else
+    _layout_table(Gtk::manage(new Gtk::Table(1, 2))),
+#endif
     _applied(false)
 {
     set_title(_("Edit profile"));
 
+#if WITH_GTKMM_3_0
+    Gtk::Box *mainVBox = get_content_area();
+    _layout_table->set_column_spacing(4);
+    _layout_table->set_row_spacing(4);
+#else
     Gtk::Box *mainVBox = get_vbox();
-    _layout_table.set_spacings(4);
-    _layout_table.resize (1, 2);
+    _layout_table->set_spacings(4);
+#endif
 
     _profile_name_entry.set_activates_default(true);
 
     _profile_name_label.set_label(_("Profile name:"));
     _profile_name_label.set_alignment(1.0, 0.5);
 
-    _layout_table.attach(_profile_name_label,
+#if WITH_GTKMM_3_0
+    _layout_table->attach(_profile_name_label, 0, 0, 1, 1);
+
+    _profile_name_entry.set_hexpand();
+    _layout_table->attach(_profile_name_entry, 1, 0, 1, 1);
+#else
+    _layout_table->attach(_profile_name_label,
 	           0, 1, 0, 1, Gtk::FILL, Gtk::FILL);
-    _layout_table.attach(_profile_name_entry,
+    _layout_table->attach(_profile_name_entry,
 	           1, 2, 0, 1, Gtk::FILL | Gtk::EXPAND, Gtk::FILL);
-    mainVBox->pack_start(_layout_table, false, false, 4);
+#endif
+
+    mainVBox->pack_start(*_layout_table, false, false, 4);
     // Buttons
     _close_button.set_use_stock(true);
     _close_button.set_label(Gtk::Stock::CANCEL.id);
diff --git a/src/ui/dialog/calligraphic-profile-rename.h b/src/ui/dialog/calligraphic-profile-rename.h
index 8fe82d7bb..4ef71900b 100644
--- a/src/ui/dialog/calligraphic-profile-rename.h
+++ b/src/ui/dialog/calligraphic-profile-rename.h
@@ -11,10 +11,22 @@
 #ifndef INKSCAPE_DIALOG_CALLIGRAPHIC_PROFILE_H
 #define INKSCAPE_DIALOG_CALLIGRAPHIC_PROFILE_H
 
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <gtkmm/dialog.h>
 #include <gtkmm/entry.h>
 #include <gtkmm/label.h>
-#include <gtkmm/table.h>
+
+namespace Gtk {
+#if WITH_GTKMM_3_0
+class Grid;
+#else
+class Table;
+#endif
+}
+
 class SPDesktop;
 
 namespace Inkscape {
@@ -47,7 +59,13 @@ protected:
 
     Gtk::Label        _profile_name_label;
     Gtk::Entry        _profile_name_entry;
-    Gtk::Table        _layout_table;
+
+#if WITH_GTKMM_3_0
+    Gtk::Grid*        _layout_table;
+#else
+    Gtk::Table*       _layout_table;
+#endif
+
     Gtk::Button       _close_button;
     Gtk::Button       _delete_button;
     Gtk::Button       _apply_button;
diff --git a/src/ui/dialog/debug.cpp b/src/ui/dialog/debug.cpp
index 429ed57bf..e61f8e389 100644
--- a/src/ui/dialog/debug.cpp
+++ b/src/ui/dialog/debug.cpp
@@ -69,7 +69,11 @@ DebugDialogImpl::DebugDialogImpl()
     set_title(_("Messages"));
     set_size_request(300, 400);
 
+#if WITH_GTKMM_3_0
+    Gtk::Box *mainVBox = get_content_area();
+#else
     Gtk::Box *mainVBox = get_vbox();
+#endif
 
     //## Add a menu for clear()
     Gtk::MenuItem* item = Gtk::manage(new Gtk::MenuItem(_("_File"), true));
diff --git a/src/ui/dialog/export.h b/src/ui/dialog/export.h
index c8376cdcb..c5782fabc 100644
--- a/src/ui/dialog/export.h
+++ b/src/ui/dialog/export.h
@@ -24,7 +24,6 @@
 #include "ui/widget/panel.h"
 #include "ui/widget/button.h"
 #include "ui/widget/entry.h"
-#include "widgets/sp-attribute-widget.h"
 
 namespace Inkscape {
 namespace UI {
diff --git a/src/ui/dialog/filter-effects-dialog.cpp b/src/ui/dialog/filter-effects-dialog.cpp
index fd368ed9f..989c40264 100644
--- a/src/ui/dialog/filter-effects-dialog.cpp
+++ b/src/ui/dialog/filter-effects-dialog.cpp
@@ -313,9 +313,15 @@ public:
             set_tooltip_text(tip_text);
         }
 
+#if WITH_GTKMM_3_0
+        Gdk::RGBA col;
+        col.set_rgba_u(65535, 65535, 65535);
+        set_rgba(col);
+#else
         Gdk::Color col;
         col.set_rgb(65535, 65535, 65535);
         set_color(col);
+#endif
     }
 
     // Returns the color in 'rgb(r,g,b)' form.
@@ -323,8 +329,14 @@ public:
     {
         // no doubles here, so we can use the standard string stream.
         std::ostringstream os;
+
+#if WITH_GTKMM_3_0
+        const Gdk::RGBA c = get_rgba();
+        const int r = c.get_red_u() / 257, g = c.get_green_u() / 257, b = c.get_blue_u() / 257;//TO-DO: verify this. This sounds a lot strange! shouldn't it be 256?
+#else
         const Gdk::Color c = get_color();
         const int r = c.get_red() / 257, g = c.get_green() / 257, b = c.get_blue() / 257;//TO-DO: verify this. This sounds a lot strange! shouldn't it be 256?
+#endif
         os << "rgb(" << r << "," << g << "," << b << ")";
         return os.str();
     }
@@ -340,9 +352,16 @@ public:
             i = (guint32) get_default()->as_uint();
         }
         const int r = SP_RGBA32_R_U(i), g = SP_RGBA32_G_U(i), b = SP_RGBA32_B_U(i);
+
+#if WITH_GTKMM_3_0
+        Gdk::RGBA col;
+        col.set_rgba_u(r * 256, g * 256, b * 256);
+        set_rgba(col);
+#else
         Gdk::Color col;
         col.set_rgb(r * 256, g * 256, b * 256);
         set_color(col);
+#endif
     }
 };
 
diff --git a/src/ui/dialog/floating-behavior.cpp b/src/ui/dialog/floating-behavior.cpp
index eab5f9d8f..d70c5f187 100644
--- a/src/ui/dialog/floating-behavior.cpp
+++ b/src/ui/dialog/floating-behavior.cpp
@@ -135,7 +135,13 @@ FloatingBehavior::create(Dialog &dialog)
 
 inline FloatingBehavior::operator Gtk::Widget &()                          { return *_d; }
 inline GtkWidget *FloatingBehavior::gobj()                                { return GTK_WIDGET(_d->gobj()); }
-inline Gtk::Box* FloatingBehavior::get_vbox()                            { return _d->get_vbox(); }
+inline Gtk::Box* FloatingBehavior::get_vbox()                            { 
+#if WITH_GTKMM_3_0
+    return _d->get_content_area();
+#else
+    return _d->get_vbox();
+#endif
+}
 inline void FloatingBehavior::present()                                   { _d->present(); }
 inline void FloatingBehavior::hide()                                      { _d->hide(); }
 inline void FloatingBehavior::show()                                      { _d->show(); }
diff --git a/src/ui/dialog/guides.cpp b/src/ui/dialog/guides.cpp
index d8bbb5539..51bbc7d9a 100644
--- a/src/ui/dialog/guides.cpp
+++ b/src/ui/dialog/guides.cpp
@@ -70,9 +70,15 @@ void GuidelinePropertiesDialog::showDialog(SPGuide *guide, SPDesktop *desktop) {
 
 void GuidelinePropertiesDialog::_colorChanged()
 {
+#if WITH_GTKMM_3_0
+    const Gdk::RGBA c = _color.get_rgba();
+    unsigned r = c.get_red_u()/257, g = c.get_green_u()/257, b = c.get_blue_u()/257;
+#else
     const Gdk::Color c = _color.get_color();
     unsigned r = c.get_red()/257, g = c.get_green()/257, b = c.get_blue()/257;
+#endif
     //TODO: why 257? verify this!
+
     sp_guide_set_color(*_guide, r, g, b, true);
 }
 
@@ -166,12 +172,12 @@ void GuidelinePropertiesDialog::_setup() {
     add_button(Gtk::Stock::DELETE, -12);
     add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
 
-    Gtk::Box *mainVBox = get_vbox();
-
 #if WITH_GTKMM_3_0
+    Gtk::Box *mainVBox = get_content_area();
     _layout_table.set_row_spacing(4);
     _layout_table.set_column_spacing(4);
 #else
+    Gtk::Box *mainVBox = get_vbox();
     _layout_table.set_spacings(4);
     _layout_table.resize (3, 4);
 #endif
@@ -328,9 +334,16 @@ void GuidelinePropertiesDialog::_setup() {
 
     // init name entry
     _label_entry.getEntry()->set_text(_guide->label ? _guide->label : "");
+
+#if WITH_GTKMM_3_0
+    Gdk::RGBA c;
+    c.set_rgba(((_guide->color>>24)&0xff) / 255.0, ((_guide->color>>16)&0xff) / 255.0, ((_guide->color>>8)&0xff) / 255.0);
+    _color.set_rgba(c);
+#else
     Gdk::Color c;
     c.set_rgb_p(((_guide->color>>24)&0xff) / 255.0, ((_guide->color>>16)&0xff) / 255.0, ((_guide->color>>8)&0xff) / 255.0);
     _color.set_color(c);
+#endif
 
     _modeChanged(); // sets values of spinboxes.
 
diff --git a/src/ui/dialog/inkscape-preferences.cpp b/src/ui/dialog/inkscape-preferences.cpp
index c63b78c70..fb814e066 100644
--- a/src/ui/dialog/inkscape-preferences.cpp
+++ b/src/ui/dialog/inkscape-preferences.cpp
@@ -799,10 +799,17 @@ static void proofComboChanged( Gtk::ComboBoxText* combo )
 }
 
 static void gamutColorChanged( Gtk::ColorButton* btn ) {
+#if WITH_GTKMM_3_0
+    Gdk::RGBA rgba = btn->get_rgba();
+    gushort r = rgba.get_red_u();
+    gushort g = rgba.get_green_u();
+    gushort b = rgba.get_blue_u();
+#else
     Gdk::Color color = btn->get_color();
     gushort r = color.get_red();
     gushort g = color.get_green();
     gushort b = color.get_blue();
+#endif
 
     gchar* tmp = g_strdup_printf("#%02x%02x%02x", (r >> 8), (g >> 8), (b >> 8) );
 
@@ -967,8 +974,15 @@ void InkscapePreferences::initPageIO()
                         _("Highlights colors that are out of gamut for the target device"), false);
 
     Glib::ustring colorStr = prefs->getString("/options/softproof/gamutcolor");
+
+#if WITH_GTKMM_3_0
+    Gdk::RGBA tmpColor( colorStr.empty() ? "#00ff00" : colorStr);
+    _cms_gamutcolor.set_rgba( tmpColor );
+#else
     Gdk::Color tmpColor( colorStr.empty() ? "#00ff00" : colorStr);
     _cms_gamutcolor.set_color( tmpColor );
+#endif
+
     _page_cms.add_line( true, _("Out of gamut warning color:"), _cms_gamutcolor, "",
                         _("Selects the color used for out of gamut warning"), false);
 
diff --git a/src/ui/dialog/layer-properties.cpp b/src/ui/dialog/layer-properties.cpp
index 6a1bc829e..3feed2afe 100644
--- a/src/ui/dialog/layer-properties.cpp
+++ b/src/ui/dialog/layer-properties.cpp
@@ -40,12 +40,12 @@ namespace Dialogs {
 LayerPropertiesDialog::LayerPropertiesDialog()
 : _strategy(NULL), _desktop(NULL), _layer(NULL), _position_visible(false)
 {
-    Gtk::Box *mainVBox = get_vbox();
-
 #if WITH_GTKMM_3_0
+    Gtk::Box *mainVBox = get_content_area();
     _layout_table.set_row_spacing(4);
     _layout_table.set_column_spacing(4);
 #else
+    Gtk::Box *mainVBox = get_vbox();
     _layout_table.set_spacings(4);
     _layout_table.resize (1, 2);
 #endif
diff --git a/src/ui/dialog/livepatheffect-add.cpp b/src/ui/dialog/livepatheffect-add.cpp
index e899dbcfc..b5f51d81d 100644
--- a/src/ui/dialog/livepatheffect-add.cpp
+++ b/src/ui/dialog/livepatheffect-add.cpp
@@ -73,7 +73,12 @@ LivePathEffectAdd::LivePathEffectAdd() :
     add_button.set_use_underline(true);
     add_button.set_can_default();
 
+#if WITH_GTKMM_3_0
+    Gtk::Box *mainVBox = get_content_area();
+#else
     Gtk::Box *mainVBox = get_vbox();
+#endif
+
     mainVBox->pack_start(scrolled_window, true, true);
     add_action_widget(close_button, Gtk::RESPONSE_CLOSE);
     add_action_widget(add_button, Gtk::RESPONSE_APPLY);
diff --git a/src/ui/dialog/object-attributes.cpp b/src/ui/dialog/object-attributes.cpp
index 1ae9730d5..3d780fa83 100644
--- a/src/ui/dialog/object-attributes.cpp
+++ b/src/ui/dialog/object-attributes.cpp
@@ -30,6 +30,7 @@
 #include "xml/repr.h"
 #include "ui/dialog/dialog-manager.h"
 #include "ui/dialog/object-attributes.h"
+#include "widgets/sp-attribute-widget.h"
 #include "inkscape.h"
 #include "selection.h"
 
@@ -81,14 +82,14 @@ ObjectAttributes::ObjectAttributes (void) :
     UI::Widget::Panel ("", "/dialogs/objectattr/", SP_VERB_DIALOG_ATTR),
     blocked (false),
     CurrentItem(NULL),
-    attrTable(),
+    attrTable(Gtk::manage(new SPAttributeTable())),
     desktop(NULL),
     deskTrack(),
     selectChangedConn(),
     subselChangedConn(),
     selectModifiedConn()
 {
-    attrTable.show();
+    attrTable->show();
     widget_setup();
     
     desktopChangeConn = deskTrack.connectDesktopChanged( sigc::mem_fun(*this, &ObjectAttributes::setTargetDesktop) );
@@ -163,12 +164,12 @@ void ObjectAttributes::widget_setup (void)
             attrs.push_back (desc[len].attribute);
             len += 1;
         }
-        attrTable.set_object(obj, labels, attrs, (GtkWidget*)gobj());
+        attrTable->set_object(obj, labels, attrs, (GtkWidget*)gobj());
         CurrentItem = item;
     }
     else
     {
-        attrTable.change_object(obj);
+        attrTable->change_object(obj);
     }
     
     set_sensitive (true);
@@ -201,7 +202,7 @@ void ObjectAttributes::selectionModifiedCB( guint flags )
     if (flags & ( SP_OBJECT_MODIFIED_FLAG |
                    SP_OBJECT_PARENT_MODIFIED_FLAG |
                    SP_OBJECT_STYLE_MODIFIED_FLAG) ) {
-        attrTable.reread_properties();
+        attrTable->reread_properties();
     }
 }
 
diff --git a/src/ui/dialog/object-attributes.h b/src/ui/dialog/object-attributes.h
index 81467dea6..b0d02a0af 100644
--- a/src/ui/dialog/object-attributes.h
+++ b/src/ui/dialog/object-attributes.h
@@ -28,7 +28,8 @@
 #include "desktop.h"
 #include "ui/dialog/desktop-tracker.h"
 #include "ui/widget/panel.h"
-#include "widgets/sp-attribute-widget.h"
+
+class SPAttributeTable;
 
 namespace Inkscape {
 namespace UI {
@@ -72,7 +73,7 @@ private:
      * in the SPAttrDesc arrays at the top of the cpp-file. This widgets also
      * ensures object attribute modifications by the user are set.
      */
-    SPAttributeTable attrTable;
+    SPAttributeTable *attrTable;
     
     /**
      * Stores the current desktop.
diff --git a/src/ui/dialog/object-properties.cpp b/src/ui/dialog/object-properties.cpp
index 0800346f7..114204961 100644
--- a/src/ui/dialog/object-properties.cpp
+++ b/src/ui/dialog/object-properties.cpp
@@ -26,11 +26,8 @@
  *   Abhishek Sharma
  */
 
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
 #include "object-properties.h"
+#include "widgets/sp-attribute-widget.h"
 #include "../../desktop-handles.h"
 #include "../../document.h"
 #include "../../document-undo.h"
@@ -50,19 +47,27 @@ ObjectProperties::ObjectProperties (void) :
     UI::Widget::Panel ("", "/dialogs/object/", SP_VERB_DIALOG_ITEM),
     blocked (false),
     CurrentItem(NULL),
-    TopTable (3, 4, false),
+#if WITH_GTKMM_3_0
+    TopTable(Gtk::manage(new Gtk::Grid())),
+#else
+    TopTable(Gtk::manage(new Gtk::Table(3, 4))),
+#endif
     LabelID(_("_ID:"), 1),
     LabelLabel(_("_Label:"), 1),
     LabelTitle(_("_Title:"),1),
     LabelDescription(_("_Description:"),1),
     FrameDescription("", FALSE),
     HBoxCheck(FALSE, 0),
-    CheckTable(1, 2, TRUE),
+#if WITH_GTKMM_3_0
+    CheckTable(Gtk::manage(new Gtk::Grid())),
+#else
+    CheckTable(Gtk::manage(new Gtk::Table(1, 2, true))),
+#endif
     CBHide(_("_Hide"), 1),
     CBLock(_("L_ock"), 1),
     BSet (_("_Set"), 1),
     LabelInteractivity(_("_Interactivity"), 1),
-    attrTable(),
+    attrTable(Gtk::manage(new SPAttributeTable())),
     desktop(NULL),
     deskTrack(),
     selectChangedConn(),
@@ -91,6 +96,11 @@ ObjectProperties::ObjectProperties (void) :
     
     desktopChangeConn = deskTrack.connectDesktopChanged( sigc::mem_fun(*this, &ObjectProperties::setTargetDesktop) );
     deskTrack.connect(GTK_WIDGET(gobj()));
+
+#if WITH_GTKMM_3_0
+    CheckTable->set_row_homogeneous();
+    CheckTable->set_column_homogeneous(true);
+#endif
     
     MakeWidget();
 }
@@ -108,24 +118,44 @@ void ObjectProperties::MakeWidget(void)
     Gtk::Box *contents = _getContents();
     contents->set_spacing(0);
     
-    TopTable.set_border_width(4);
-    TopTable.set_row_spacings(4);
-    TopTable.set_col_spacings(0);
-    contents->pack_start (TopTable, false, false, 0);
+    TopTable->set_border_width(4);
+
+#if WITH_GTKMM_3_0
+    TopTable->set_row_spacing(4);
+    TopTable->set_column_spacing(0);
+#else
+    TopTable->set_row_spacings(4);
+    TopTable->set_col_spacings(0);
+#endif
+
+    contents->pack_start (*TopTable, false, false, 0);
 
     /* Create the label for the object id */
     LabelID.set_label (LabelID.get_label() + " ");
     LabelID.set_alignment (1, 0.5);
-    TopTable.attach (LabelID, 0, 1, 0, 1,
-                       Gtk::SHRINK | Gtk::FILL,
-                       Gtk::AttachOptions(), 0, 0 );
+
+#if WITH_GTKMM_3_0
+    LabelID.set_valign(Gtk::ALIGN_CENTER);
+    TopTable->attach(LabelID, 0, 0, 1, 1);
+#else
+    TopTable->attach(LabelID, 0, 1, 0, 1,
+                      Gtk::SHRINK | Gtk::FILL,
+                      Gtk::AttachOptions(), 0, 0 );
+#endif
 
     /* Create the entry box for the object id */
     EntryID.set_tooltip_text (_("The id= attribute (only letters, digits, and the characters .-_: allowed)"));
     EntryID.set_max_length (64);
-    TopTable.attach (EntryID, 1, 2, 0, 1,
-                       Gtk::EXPAND | Gtk::FILL,
-                       Gtk::AttachOptions(), 0, 0 );
+
+#if WITH_GTKMM_3_0
+    EntryID.set_valign(Gtk::ALIGN_CENTER);
+    TopTable->attach(EntryID, 1, 0, 1, 1);
+#else
+    TopTable->attach(EntryID, 1, 2, 0, 1,
+                     Gtk::EXPAND | Gtk::FILL,
+                     Gtk::AttachOptions(), 0, 0 );
+#endif
+
     LabelID.set_mnemonic_widget (EntryID);
 
     // pressing enter in the id field is the same as clicking Set:
@@ -136,16 +166,30 @@ void ObjectProperties::MakeWidget(void)
     /* Create the label for the object label */
     LabelLabel.set_label (LabelLabel.get_label() + " ");
     LabelLabel.set_alignment (1, 0.5);
-    TopTable.attach (LabelLabel, 0, 1, 1, 2,
-                       Gtk::SHRINK | Gtk::FILL,
-                       Gtk::AttachOptions(), 0, 0 );
+
+#if WITH_GTKMM_3_0
+    LabelLabel.set_valign(Gtk::ALIGN_CENTER);
+    TopTable->attach(LabelLabel, 0, 1, 1, 1);
+#else
+    TopTable->attach(LabelLabel, 0, 1, 1, 2,
+                     Gtk::SHRINK | Gtk::FILL,
+                     Gtk::AttachOptions(), 0, 0 );
+#endif
 
     /* Create the entry box for the object label */
     EntryLabel.set_tooltip_text (_("A freeform label for the object"));
     EntryLabel.set_max_length (256);
-    TopTable.attach (EntryLabel, 1, 2, 1, 2,
-                       Gtk::EXPAND | Gtk::FILL,
-                       Gtk::AttachOptions(), 0, 0 );
+
+#if WITH_GTKMM_3_0
+    EntryLabel.set_hexpand();
+    EntryLabel.set_valign(Gtk::ALIGN_CENTER);
+    TopTable->attach(EntryLabel, 1, 1, 1, 1);
+#else
+    TopTable->attach(EntryLabel, 1, 2, 1, 2,
+                     Gtk::EXPAND | Gtk::FILL,
+                     Gtk::AttachOptions(), 0, 0 );
+#endif
+
     LabelLabel.set_mnemonic_widget (EntryLabel);
 
     // pressing enter in the label field is the same as clicking Set:
@@ -154,16 +198,30 @@ void ObjectProperties::MakeWidget(void)
     /* Create the label for the object title */
     LabelTitle.set_label (LabelTitle.get_label() + " ");
     LabelTitle.set_alignment (1, 0.5);
-    TopTable.attach (LabelTitle, 0, 1, 2, 3,
-                       Gtk::SHRINK | Gtk::FILL,
-                       Gtk::AttachOptions(), 0, 0 );
+
+#if WITH_GTKMM_3_0
+    LabelTitle.set_valign(Gtk::ALIGN_CENTER);
+    TopTable->attach(LabelTitle, 0, 2, 1, 1);
+#else
+    TopTable->attach(LabelTitle, 0, 1, 2, 3,
+                     Gtk::SHRINK | Gtk::FILL,
+                     Gtk::AttachOptions(), 0, 0 );
+#endif
 
     /* Create the entry box for the object title */
     EntryTitle.set_sensitive (FALSE);
     EntryTitle.set_max_length (256);
-    TopTable.attach (EntryTitle, 1, 2, 2, 3,
-                       Gtk::EXPAND | Gtk::FILL,
-                       Gtk::AttachOptions(), 0, 0 );
+
+#if WITH_GTKMM_3_0
+    EntryTitle.set_hexpand();
+    EntryTitle.set_valign(Gtk::ALIGN_CENTER);
+    TopTable->attach(EntryTitle, 1, 2, 1, 1);
+#else
+    TopTable->attach(EntryTitle, 1, 2, 2, 3,
+                     Gtk::EXPAND | Gtk::FILL,
+                     Gtk::AttachOptions(), 0, 0 );
+#endif
+
     LabelTitle.set_mnemonic_widget (EntryTitle);
     // pressing enter in the label field is the same as clicking Set:
     EntryTitle.signal_activate().connect(sigc::mem_fun(this, &ObjectProperties::label_changed));
@@ -186,29 +244,52 @@ void ObjectProperties::MakeWidget(void)
 
     /* Check boxes */
     contents->pack_start (HBoxCheck, FALSE, FALSE, 0);
-    CheckTable.set_border_width(4);
-    HBoxCheck.pack_start (CheckTable, TRUE, TRUE, 0);
+    CheckTable->set_border_width(4);
+    HBoxCheck.pack_start(*CheckTable, true, true, 0);
 
     /* Hide */
     CBHide.set_tooltip_text (_("Check to make the object invisible"));
-    CheckTable.attach (CBHide, 0, 1, 0, 1,
+
+#if WITH_GTKMM_3_0
+    CBHide.set_hexpand();
+    CBHide.set_valign(Gtk::ALIGN_CENTER);
+    CheckTable->attach(CBHide, 0, 0, 1, 1);
+#else
+    CheckTable->attach(CBHide, 0, 1, 0, 1,
                        Gtk::EXPAND | Gtk::FILL,
                        Gtk::AttachOptions(), 0, 0 );
+#endif
+
     CBHide.signal_toggled().connect(sigc::mem_fun(this, &ObjectProperties::hidden_toggled));
 
     /* Lock */
     // TRANSLATORS: "Lock" is a verb here
     CBLock.set_tooltip_text (_("Check to make the object insensitive (not selectable by mouse)"));
-    CheckTable.attach (CBLock, 1, 2, 0, 1,
+
+#if WITH_GTKMM_3_0
+    CBLock.set_hexpand();
+    CBLock.set_valign(Gtk::ALIGN_CENTER);
+    CheckTable->attach(CBLock, 1, 0, 1, 1);
+#else
+    CheckTable->attach(CBLock, 1, 2, 0, 1,
                        Gtk::EXPAND | Gtk::FILL,
                        Gtk::AttachOptions(), 0, 0 );
+#endif
+
     CBLock.signal_toggled().connect(sigc::mem_fun(this, &ObjectProperties::sensitivity_toggled));
 
 
     /* Button for setting the object's id, label, title and description. */
-    CheckTable.attach (BSet, 2, 3, 0, 1,
+#if WITH_GTKMM_3_0
+    BSet.set_hexpand();
+    BSet.set_valign(Gtk::ALIGN_CENTER);
+    CheckTable->attach(BSet, 2, 0, 1, 1);
+#else
+    CheckTable->attach(BSet, 2, 3, 0, 1,
                        Gtk::EXPAND | Gtk::FILL,
                        Gtk::AttachOptions(), 0, 0 );
+#endif
+
     BSet.signal_clicked().connect(sigc::mem_fun(this, &ObjectProperties::label_changed));
 
     /* Create the frame for interactivity options */
@@ -237,7 +318,7 @@ void ObjectProperties::widget_setup(void)
         CurrentItem = NULL;
         //no selection anymore or multiple objects selected, means that we need
         //to close the connections to the previously selected object
-        attrTable.clear();
+        attrTable->clear();
         return;
     } else {
         contents->set_sensitive (true);
@@ -301,13 +382,13 @@ void ObjectProperties::widget_setup(void)
         
         if (CurrentItem == NULL)
         {
-            attrTable.set_object(obj, int_labels, int_attrs, (GtkWidget*)EInteractivity.gobj());
+            attrTable->set_object(obj, int_labels, int_attrs, (GtkWidget*)EInteractivity.gobj());
         }
         else
         {
-            attrTable.change_object(obj);
+            attrTable->change_object(obj);
         }
-        attrTable.show_all();
+        attrTable->show_all();
     }
     CurrentItem = item;
     blocked = false;
diff --git a/src/ui/dialog/object-properties.h b/src/ui/dialog/object-properties.h
index a04c62bec..b49293ea1 100644
--- a/src/ui/dialog/object-properties.h
+++ b/src/ui/dialog/object-properties.h
@@ -29,6 +29,10 @@
 #ifndef SEEN_DIALOGS_ITEM_PROPERTIES_H
 #define SEEN_DIALOGS_ITEM_PROPERTIES_H
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include "ui/widget/panel.h"
 #include "ui/widget/frame.h"
 #include <gtkmm/entry.h>
@@ -37,8 +41,8 @@
 #include <gtkmm/textview.h>
 
 #include "ui/dialog/desktop-tracker.h"
-#include "widgets/sp-attribute-widget.h"
 
+class SPAttributeTable;
 class SPDesktop;
 class SPItem;
 
@@ -70,7 +74,12 @@ private:
     std::vector<Glib::ustring> int_attrs;
     std::vector<Glib::ustring> int_labels;
     
-    Gtk::Table TopTable; //the table with the object properties
+#if WITH_GTKMM_3_0
+    Gtk::Grid  *TopTable; //the table with the object properties
+#else
+    Gtk::Table *TopTable; //the table with the object properties
+#endif
+
     Gtk::Label LabelID; //the label for the object ID
     Gtk::Entry EntryID; //the entry for the object ID
     Gtk::Label LabelLabel; //the label for the object label
@@ -84,14 +93,20 @@ private:
     Gtk::TextView TextViewDescription; //the text view object showing the object description
     
     Gtk::HBox HBoxCheck; // the HBox for the check boxes
-    Gtk::Table CheckTable; //the table for the check boxes
+
+#if WITH_GTKMM_3_0
+    Gtk::Grid  *CheckTable; //the table for the check boxes
+#else
+    Gtk::Table *CheckTable; //the table for the check boxes
+#endif
+
     Gtk::CheckButton CBHide; //the check button hide
     Gtk::CheckButton CBLock; //the check button lock
     Gtk::Button BSet; //the button set
     
     Gtk::Label LabelInteractivity; //the label for interactivity
     Gtk::Expander EInteractivity; //the label for interactivity
-    SPAttributeTable attrTable; //the widget for showing the on... names at the bottom
+    SPAttributeTable *attrTable; //the widget for showing the on... names at the bottom
     
     SPDesktop *desktop;
     DesktopTracker deskTrack;
diff --git a/src/ui/dialog/svg-fonts-dialog.cpp b/src/ui/dialog/svg-fonts-dialog.cpp
index be69635e8..0da39dd73 100644
--- a/src/ui/dialog/svg-fonts-dialog.cpp
+++ b/src/ui/dialog/svg-fonts-dialog.cpp
@@ -22,6 +22,7 @@
 #include "document-undo.h"
 #include <gtkmm/notebook.h>
 #include <gtkmm/imagemenuitem.h>
+#include <gtkmm/scale.h>
 #include <gtkmm/stock.h>
 #include <glibmm/i18n.h>
 #include <message-stack.h>
@@ -191,7 +192,7 @@ void SvgFontsDialog::on_kerning_value_changed(){
     //slider values increase from right to left so that they match the kerning pair preview
 
     //XML Tree being directly used here while it shouldn't be.
-    this->kerning_pair->getRepr()->setAttribute("k", Glib::Ascii::dtostr(get_selected_spfont()->horiz_adv_x - kerning_slider.get_value()).c_str());
+    this->kerning_pair->getRepr()->setAttribute("k", Glib::Ascii::dtostr(get_selected_spfont()->horiz_adv_x - kerning_slider->get_value()).c_str());
     DocumentUndo::maybeDone(document, undokey.c_str(), SP_VERB_DIALOG_SVG_FONTS, _("Adjust kerning value"));
 
     //populate_kerning_pairs_box();
@@ -299,7 +300,7 @@ void SvgFontsDialog::on_kerning_pair_selection_changed(){
     this->kerning_pair = kern;
 
     //slider values increase from right to left so that they match the kerning pair preview
-    kerning_slider.set_value(get_selected_spfont()->horiz_adv_x - kern->k);
+    kerning_slider->set_value(get_selected_spfont()->horiz_adv_x - kern->k);
 }
 
 void SvgFontsDialog::update_global_settings_tab(){
@@ -328,9 +329,9 @@ void SvgFontsDialog::on_font_selection_changed(){
     double set_width = spfont->horiz_adv_x;
     setwidth_spin.set_value(set_width);
 
-    kerning_slider.set_range(0, set_width);
-    kerning_slider.set_draw_value(false);
-    kerning_slider.set_value(0);
+    kerning_slider->set_range(0, set_width);
+    kerning_slider->set_draw_value(false);
+    kerning_slider->set_value(0);
 
     update_global_settings_tab();
     populate_glyphs_box();
@@ -779,7 +780,7 @@ Gtk::VBox* SvgFontsDialog::kerning_tab(){
     add_kernpair_button.set_label(_("Add pair"));
     add_kernpair_button.signal_clicked().connect(sigc::mem_fun(*this, &SvgFontsDialog::add_kerning_pair));
     _KerningPairsList.get_selection()->signal_changed().connect(sigc::mem_fun(*this, &SvgFontsDialog::on_kerning_pair_selection_changed));
-    kerning_slider.signal_value_changed().connect(sigc::mem_fun(*this, &SvgFontsDialog::on_kerning_value_changed));
+    kerning_slider->signal_value_changed().connect(sigc::mem_fun(*this, &SvgFontsDialog::on_kerning_value_changed));
 
     kerning_vbox.pack_start(*kerning_selector, false,false);
 
@@ -797,7 +798,7 @@ Gtk::VBox* SvgFontsDialog::kerning_tab(){
     Gtk::HBox* kerning_amount_hbox = Gtk::manage(new Gtk::HBox());
     kerning_vbox.pack_start(*kerning_amount_hbox, false,false);
     kerning_amount_hbox->add(*Gtk::manage(new Gtk::Label(_("Kerning value:"))));
-    kerning_amount_hbox->add(kerning_slider);
+    kerning_amount_hbox->add(*kerning_slider);
 
     kerning_preview.set_size(300 + 20, 150 + 20);
     _font_da.set_size(150 + 20, 50 + 20);
@@ -884,6 +885,12 @@ void SvgFontsDialog::add_font(){
 SvgFontsDialog::SvgFontsDialog()
  : UI::Widget::Panel("", "/dialogs/svgfonts", SP_VERB_DIALOG_SVG_FONTS), _add(Gtk::Stock::NEW)
 {
+#if WITH_GTKMM_3_0
+    kerning_slider = Gtk::manage(new Gtk::Scale(Gtk::ORIENTATION_HORIZONTAL));
+#else
+    kerning_slider = Gtk::manage(new Gtk::HScale);
+#endif
+
     _add.signal_clicked().connect(sigc::mem_fun(*this, &SvgFontsDialog::add_font));
 
     Gtk::HBox* hbox = Gtk::manage(new Gtk::HBox());
diff --git a/src/ui/dialog/svg-fonts-dialog.h b/src/ui/dialog/svg-fonts-dialog.h
index 910f79d4c..9be984820 100644
--- a/src/ui/dialog/svg-fonts-dialog.h
+++ b/src/ui/dialog/svg-fonts-dialog.h
@@ -20,13 +20,20 @@
 #include <gtkmm/drawingarea.h>
 #include <gtkmm/entry.h>
 #include <gtkmm/liststore.h>
-#include <gtkmm/scale.h>
 #include <gtkmm/scrolledwindow.h>
 #include <gtkmm/treeview.h>
 
 #include "attributes.h"
 #include "xml/helper-observer.h"
 
+namespace Gtk {
+#if WITH_GTKMM_3_0
+class Scale;
+#else
+class HScale;
+#endif
+}
+
 class SPGlyph;
 class SPGlyphKerning;
 class SvgFont;
@@ -210,7 +217,12 @@ private:
     GlyphComboBox first_glyph, second_glyph;
     SPGlyphKerning* kerning_pair;
     Inkscape::UI::Widget::SpinButton setwidth_spin;
-    Gtk::HScale kerning_slider;
+
+#if WITH_GTKMM_3_0
+    Gtk::Scale* kerning_slider;
+#else
+    Gtk::HScale* kerning_slider;
+#endif
 
     class EntryWidget : public Gtk::HBox
         {
diff --git a/src/ui/dialog/swatches.cpp b/src/ui/dialog/swatches.cpp
index 71fee342a..90cb1cdc9 100644
--- a/src/ui/dialog/swatches.cpp
+++ b/src/ui/dialog/swatches.cpp
@@ -1179,9 +1179,6 @@ void SwatchesPanel::_rebuild()
     _holder->thawUpdates();
 }
 
-
-
-
 } //namespace Dialogs
 } //namespace UI
 } //namespace Inkscape
diff --git a/src/ui/previewholder.cpp b/src/ui/previewholder.cpp
index 0b280ccb9..b5a1a29a8 100644
--- a/src/ui/previewholder.cpp
+++ b/src/ui/previewholder.cpp
@@ -19,6 +19,12 @@
 #include <gtkmm/scrollbar.h>
 #include <gtkmm/adjustment.h>
 
+#if WITH_GTKMM_3_0
+# include <gtkmm/grid.h>
+#else
+# include <gtkmm/table.h>
+#endif
+
 #define COLUMNS_FOR_SMALL 16
 #define COLUMNS_FOR_LARGE 8
 //#define COLUMNS_FOR_SMALL 48
@@ -44,13 +50,31 @@ PreviewHolder::PreviewHolder() :
     _border(BORDER_NONE)
 {
     _scroller = manage(new Gtk::ScrolledWindow());
+
+#if WITH_GTKMM_3_0
+    _insides = manage(new Gtk::Grid());
+    _insides->set_column_spacing(8);
+    
+    // Add a container with the scroller and a spacer
+    Gtk::Grid* spaceHolder = manage(new Gtk::Grid());
+
+    _scroller->set_hexpand();
+    _scroller->set_vexpand();
+#else
     _insides = manage(new Gtk::Table( 1, 2 ));
     _insides->set_col_spacings( 8 );
-
+    
     // Add a container with the scroller and a spacer
     Gtk::Table* spaceHolder = manage( new Gtk::Table(1, 2) );
+#endif
+
     _scroller->add( *_insides );
+    
+#if WITH_GTKMM_3_0
+    spaceHolder->attach( *_scroller, 0, 0, 1, 1);
+#else
     spaceHolder->attach( *_scroller, 0, 1, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
+#endif
 
     pack_start(*spaceHolder, Gtk::PACK_EXPAND_WIDGET);
 }
@@ -93,6 +117,11 @@ void PreviewHolder::clear()
     rebuildUI();
 }
 
+/**
+ * Add a Previewable item to the PreviewHolder
+ *
+ * \param[in] preview The Previewable item to add
+ */
 void PreviewHolder::addPreview( Previewable* preview )
 {
     items.push_back(preview);
@@ -100,41 +129,78 @@ void PreviewHolder::addPreview( Previewable* preview )
     {
         int i = items.size() - 1;
 
-        if ( _view == VIEW_TYPE_LIST ) {
-            Gtk::Widget* label = manage(preview->getPreview(PREVIEW_STYLE_BLURB, VIEW_TYPE_LIST, _baseSize, _ratio, _border));
-            Gtk::Widget* thing = manage(preview->getPreview(PREVIEW_STYLE_PREVIEW, VIEW_TYPE_LIST, _baseSize, _ratio, _border));
+        switch(_view) {
+            case VIEW_TYPE_LIST:
+                {
+                    Gtk::Widget* label = manage(preview->getPreview(PREVIEW_STYLE_BLURB, VIEW_TYPE_LIST, _baseSize, _ratio, _border));
+                    Gtk::Widget* thing = manage(preview->getPreview(PREVIEW_STYLE_PREVIEW, VIEW_TYPE_LIST, _baseSize, _ratio, _border));
 
-            _insides->attach( *thing, 0, 1, i, i+1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
-            _insides->attach( *label, 1, 2, i, i+1, Gtk::FILL|Gtk::EXPAND, Gtk::SHRINK );
-        } else {
-            Gtk::Widget* thing = manage(items[i]->getPreview(PREVIEW_STYLE_PREVIEW, VIEW_TYPE_GRID, _baseSize, _ratio, _border));
-
-            int width = 1;
-            int height = 1;
-            calcGridSize( thing, items.size(), width, height );
-            int col = i % width;
-            int row = i / width;
-
-            if ( _insides && width > (int)_insides->property_n_columns() ) {
-                std::vector<Gtk::Widget*>kids = _insides->get_children();
-                int oldWidth = (int)_insides->property_n_columns();
-                int childCount = (int)kids.size();
-//             g_message("  %3d  resize from %d to %d  (r:%d, c:%d)  with %d children", i, oldWidth, width, row, col, childCount );
-                _insides->resize( height, width );
-
-                for ( int j = oldWidth; j < childCount; j++ ) {
-                    Gtk::Widget* target = kids[childCount - (j + 1)];
-                    int col2 = j % width;
-                    int row2 = j / width;
-                    Glib::RefPtr<Gtk::Widget> handle(target);
-                    _insides->remove( *target );
-                    _insides->attach( *target, col2, col2+1, row2, row2+1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
+#if WITH_GTKMM_3_0
+                    thing->set_hexpand();
+                    thing->set_vexpand();
+                    _insides->attach(*thing, 0, i, 1, 1);
+
+                    label->set_hexpand();
+                    label->set_valign(Gtk::ALIGN_CENTER);
+                    _insides->attach(*label, 1, i, 1, 1);
+#else
+                    _insides->attach( *thing, 0, 1, i, i+1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
+                    _insides->attach( *label, 1, 2, i, i+1, Gtk::FILL|Gtk::EXPAND, Gtk::SHRINK );
+#endif
+                }
+
+                break;
+            case VIEW_TYPE_GRID:
+                {
+                    Gtk::Widget* thing = manage(items[i]->getPreview(PREVIEW_STYLE_PREVIEW, VIEW_TYPE_GRID, _baseSize, _ratio, _border));
+
+                    int width = 1;
+                    int height = 1;
+                    calcGridSize( thing, items.size(), width, height );
+
+                    // Column and row for the new widget
+                    int col = i % width;
+                    int row = i / width;
+
+#if !WITH_GTKMM_3_0
+                    // If the existing grid isn't wide enough, we need to resize
+                    // it and re-pack the existing widgets
+                    if ( _insides && width > (int)_insides->property_n_columns() ) {
+                        _insides->resize( height, width );
+#endif
+                        std::vector<Gtk::Widget*>kids = _insides->get_children();
+                        int childCount = (int)kids.size();
+                        //             g_message("  %3d  resize from %d to %d  (r:%d, c:%d)  with %d children", i, oldWidth, width, row, col, childCount );
+
+                        // Loop through the existing widgets and move them to new location
+                        for ( int j = 1; j < childCount; j++ ) {
+                            Gtk::Widget* target = kids[childCount - (j + 1)];
+                            int col2 = j % width;
+                            int row2 = j / width;
+                            Glib::RefPtr<Gtk::Widget> handle(target);
+                            _insides->remove( *target );
+
+#if WITH_GTKMM_3_0
+                            target->set_hexpand();
+                            target->set_vexpand();
+                            _insides->attach( *target, col2, row2, 1, 1);
+#else
+                            _insides->attach( *target, col2, col2+1, row2, row2+1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
+#endif
+                        }
+#if WITH_GTKMM_3_0
+                        thing->set_hexpand();
+                        thing->set_vexpand();
+                        _insides->attach(*thing, col, row, 1, 1);
+#else
+                    } else if ( col == 0 ) {
+                        // we just started a new row
+                        _insides->resize( row + 1, width );
+                    }
+                    
+                    _insides->attach( *thing, col, col+1, row, row+1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
+#endif
                 }
-            } else if ( col == 0 ) {
-                // we just started a new row
-                _insides->resize( row + 1, width );
-            }
-            _insides->attach( *thing, col, col+1, row, row+1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
         }
 
         _scroller->show_all_children();
@@ -258,8 +324,17 @@ void PreviewHolder::on_size_allocate( Gtk::Allocation& allocation )
 //     g_message("             items:%d", (int)items.size());
 //}
 
+/**
+ * Calculate the grid side of a preview holder
+ *
+ * \param[in]  thing
+ * \param[in]  itemCount  The number of items to pack into the grid
+ * \param[out] width      The width of the grid
+ * \param[out] height     The height of the grid
+ */
 void PreviewHolder::calcGridSize( const Gtk::Widget* thing, int itemCount, int& width, int& height )
 {
+    // Initially set all items in a horizontal row
     width = itemCount;
     height = 1;
 
@@ -326,55 +401,104 @@ void PreviewHolder::rebuildUI()
     _scroller->remove();
     _insides = 0; // remove() call should have deleted the Gtk::Table.
 
-    if ( _view == VIEW_TYPE_LIST ) {
-        _insides = manage(new Gtk::Table( 1, 2 ));
-        _insides->set_col_spacings( 8 );
-        if (_border == BORDER_WIDE) {
-            _insides->set_row_spacings( 1 );
-        }
+    switch(_view) {
+        case VIEW_TYPE_LIST:
+            {
 
-        for ( unsigned int i = 0; i < items.size(); i++ ) {
-            Gtk::Widget* label = manage(items[i]->getPreview(PREVIEW_STYLE_BLURB, _view, _baseSize, _ratio, _border));
-            //label->set_alignment(Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER);
+#if WITH_GTKMM_3_0
+                _insides = manage(new Gtk::Grid());
+                _insides->set_column_spacing(8);
+#else
+                _insides = manage(new Gtk::Table( 1, 2 ));
+                _insides->set_col_spacings( 8 );
+#endif
 
-            Gtk::Widget* thing = manage(items[i]->getPreview(PREVIEW_STYLE_PREVIEW, _view, _baseSize, _ratio, _border));
+                if (_border == BORDER_WIDE) {
+#if WITH_GTKMM_3_0
+                    _insides->set_row_spacing(1);
+#else
+                    _insides->set_row_spacings( 1 );
+#endif
+                }
 
-            _insides->attach( *thing, 0, 1, i, i+1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
-            _insides->attach( *label, 1, 2, i, i+1, Gtk::FILL|Gtk::EXPAND, Gtk::SHRINK );
-        }
-        _scroller->add( *_insides );
-    } else {
-        int col = 0;
-        int row = 0;
-        int width = 2;
-        int height = 1;
+                for ( unsigned int i = 0; i < items.size(); i++ ) {
+                    Gtk::Widget* label = manage(items[i]->getPreview(PREVIEW_STYLE_BLURB, _view, _baseSize, _ratio, _border));
+                    //label->set_alignment(Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER);
 
-        for ( unsigned int i = 0; i < items.size(); i++ ) {
+                    Gtk::Widget* thing = manage(items[i]->getPreview(PREVIEW_STYLE_PREVIEW, _view, _baseSize, _ratio, _border));
 
-            // If this is the last row, flag so the previews can draw a bottom
-            ::BorderStyle border = ((row == height -1) && (_border == BORDER_SOLID)) ? BORDER_SOLID_LAST_ROW : _border;
-            Gtk::Widget* thing = manage(items[i]->getPreview(PREVIEW_STYLE_PREVIEW, _view, _baseSize, _ratio, border));
+#if WITH_GTKMM_3_0
+                    thing->set_hexpand();
+                    thing->set_vexpand();
+                    _insides->attach(*thing, 0, i, 1, 1);
 
-            if ( !_insides ) {
-                calcGridSize( thing, items.size(), width, height );
-                _insides = manage(new Gtk::Table( height, width ));
-                if (_border == BORDER_WIDE) {
-                    _insides->set_col_spacings( 1 );
-                    _insides->set_row_spacings( 1 );
+                    label->set_hexpand();
+                    label->set_valign(Gtk::ALIGN_CENTER);
+                    _insides->attach(*label, 1, i, 1, 1);
+#else
+                    _insides->attach( *thing, 0, 1, i, i+1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
+                    _insides->attach( *label, 1, 2, i, i+1, Gtk::FILL|Gtk::EXPAND, Gtk::SHRINK );
+#endif
                 }
-            }
 
-            _insides->attach( *thing, col, col+1, row, row+1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
-            if ( ++col >= width ) {
-                col = 0;
-                row++;
+                _scroller->add( *_insides );
             }
-        }
-        if ( !_insides ) {
-            _insides = manage(new Gtk::Table( 1, 2 ));
-        }
+            break;
 
-        _scroller->add( *_insides );
+        case VIEW_TYPE_GRID:
+            {
+                int col = 0;
+                int row = 0;
+                int width = 2;
+                int height = 1;
+
+                for ( unsigned int i = 0; i < items.size(); i++ ) {
+
+                    // If this is the last row, flag so the previews can draw a bottom
+                    ::BorderStyle border = ((row == height -1) && (_border == BORDER_SOLID)) ? BORDER_SOLID_LAST_ROW : _border;
+                    Gtk::Widget* thing = manage(items[i]->getPreview(PREVIEW_STYLE_PREVIEW, _view, _baseSize, _ratio, border));
+
+                    if ( !_insides ) {
+                        calcGridSize( thing, items.size(), width, height );
+
+#if WITH_GTKMM_3_0
+                        _insides = manage(new Gtk::Grid());
+                        if (_border == BORDER_WIDE) {
+                            _insides->set_column_spacing(1);
+                            _insides->set_row_spacing(1);
+                        }
+#else
+                        _insides = manage(new Gtk::Table( height, width ));
+                        if (_border == BORDER_WIDE) {
+                            _insides->set_col_spacings( 1 );
+                            _insides->set_row_spacings( 1 );
+                        }
+#endif
+                    }
+
+#if WITH_GTKMM_3_0
+                    thing->set_hexpand();
+                    thing->set_vexpand();
+                    _insides->attach( *thing, col, row, 1, 1);
+#else
+                    _insides->attach( *thing, col, col+1, row, row+1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );
+#endif
+
+                    if ( ++col >= width ) {
+                        col = 0;
+                        row++;
+                    }
+                }
+                if ( !_insides ) {
+#if WITH_GTKMM_3_0
+                    _insides = manage(new Gtk::Grid());
+#else
+                    _insides = manage(new Gtk::Table( 1, 2 ));
+#endif
+                }
+
+                _scroller->add( *_insides );
+            }
     }
 
     _scroller->show_all_children();
diff --git a/src/ui/previewholder.h b/src/ui/previewholder.h
index 4c591bfaf..f6d1985cc 100644
--- a/src/ui/previewholder.h
+++ b/src/ui/previewholder.h
@@ -12,10 +12,21 @@
  * Released under GNU GPL, read the file 'COPYING' for more information
  */
 
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
 
 #include <gtkmm/box.h>
 #include <gtkmm/bin.h>
-#include <gtkmm/table.h>
+
+namespace Gtk {
+#if WITH_GTKMM_3_0
+class Grid;
+#else
+class Table;
+#endif
+}
+
 #include "previewfillable.h"
 #include "../widgets/eek-preview.h"
 #include "enums.h"
@@ -56,7 +67,13 @@ private:
 
     std::vector<Previewable*> items;
     Gtk::Bin *_scroller;
+
+#if WITH_GTKMM_3_0
+    Gtk::Grid *_insides;
+#else
     Gtk::Table *_insides;
+#endif
+
     int _prefCols;
     bool _updatesFrozen;
     SPAnchorType _anchor;
diff --git a/src/ui/widget/color-picker.cpp b/src/ui/widget/color-picker.cpp
index 31fb3096c..5585f2db4 100644
--- a/src/ui/widget/color-picker.cpp
+++ b/src/ui/widget/color-picker.cpp
@@ -56,8 +56,14 @@ void ColorPicker::setupDialog(const Glib::ustring &title)
     _colorSelectorDialog.set_title (title);
     _colorSelectorDialog.set_border_width (4);
     _colorSelector = SP_COLOR_SELECTOR(sp_color_selector_new(SP_TYPE_COLOR_NOTEBOOK));
+
+#if WITH_GTKMM_3_0
+    _colorSelectorDialog.get_content_area()->pack_start (
+              *Glib::wrap(&_colorSelector->vbox), true, true, 0);
+#else
     _colorSelectorDialog.get_vbox()->pack_start (
               *Glib::wrap(&_colorSelector->vbox), true, true, 0);
+#endif
 
     g_signal_connect(G_OBJECT(_colorSelector), "dragged",
                          G_CALLBACK(sp_color_picker_color_mod), (void *)this);
diff --git a/src/ui/widget/dock.cpp b/src/ui/widget/dock.cpp
index a38a93fb1..2bfc7e0df 100644
--- a/src/ui/widget/dock.cpp
+++ b/src/ui/widget/dock.cpp
@@ -54,6 +54,17 @@ Dock::Dock(Gtk::Orientation orientation)
 {
     gdl_dock_bar_set_orientation(_gdl_dock_bar, static_cast<GtkOrientation>(orientation));
 
+#if WITH_GTKMM_3_0
+    switch(orientation) {
+        case Gtk::ORIENTATION_VERTICAL:
+            _dock_box = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL));
+            break;
+        case Gtk::ORIENTATION_HORIZONTAL:
+            _dock_box = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_VERTICAL));
+    }
+    
+    _paned = Gtk::manage(new Gtk::Paned(orientation));
+#else
     switch (orientation) {
         case Gtk::ORIENTATION_VERTICAL:
             _dock_box = Gtk::manage(new Gtk::HBox());
@@ -63,6 +74,7 @@ Dock::Dock(Gtk::Orientation orientation)
             _dock_box = Gtk::manage(new Gtk::VBox());
             _paned = Gtk::manage(new Gtk::HPaned());
     }
+#endif
 
     _scrolled_window->add(*_dock_box);
     _scrolled_window->set_policy(Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
diff --git a/src/ui/widget/scalar.cpp b/src/ui/widget/scalar.cpp
index 9bbcc80f9..fca8a7974 100644
--- a/src/ui/widget/scalar.cpp
+++ b/src/ui/widget/scalar.cpp
@@ -142,7 +142,7 @@ void Scalar::update()
 void Scalar::addSlider()
 {
 #if WITH_GTKMM_3_0
-    Gtk::HScale *scale = new Gtk::HScale(static_cast<SpinButton*>(_widget)->get_adjustment());
+    Gtk::Scale *scale = new Gtk::Scale(static_cast<SpinButton*>(_widget)->get_adjustment());
 #else
     Gtk::HScale *scale = new Gtk::HScale( * static_cast<SpinButton*>(_widget)->get_adjustment() );
 #endif
diff --git a/src/ui/widget/selected-style.cpp b/src/ui/widget/selected-style.cpp
index 41d7c8be2..18dbb984b 100644
--- a/src/ui/widget/selected-style.cpp
+++ b/src/ui/widget/selected-style.cpp
@@ -119,8 +119,11 @@ SelectedStyle::SelectedStyle(bool /*layout*/)
       current_stroke_width(0),
 
       _desktop (NULL),
-
+#if WITH_GTKMM_3_0
+      _table(),
+#else
       _table(2, 6),
+#endif
       _fill_label (_("Fill:")),
       _stroke_label (_("Stroke:")),
       _opacity_label (_("O:")),
@@ -158,8 +161,13 @@ SelectedStyle::SelectedStyle(bool /*layout*/)
     _opacity_label.set_alignment(0.0, 0.5);
     _opacity_label.set_padding(0, 0);
 
+#if WITH_GTKMM_3_0
+    _table.set_column_spacing(2);
+    _table.set_row_spacing(0);
+#else
     _table.set_col_spacings (2);
     _table.set_row_spacings (0);
+#endif
 
     for (int i = SS_FILL; i <= SS_STROKE; i++) {
 
@@ -361,6 +369,16 @@ SelectedStyle::SelectedStyle(bool /*layout*/)
     _opacity_sb.set_size_request (SELECTED_STYLE_SB_WIDTH, -1);
     _opacity_sb.set_sensitive (false);
 
+#if WITH_GTKMM_3_0
+    _table.attach(_fill_label, 0, 0, 1, 1);
+    _table.attach(_stroke_label, 0, 1, 1, 1);
+
+    _table.attach(_fill_flag_place, 1, 0, 1, 1);
+    _table.attach(_stroke_flag_place, 1, 1, 1, 1);
+
+    _table.attach(_fill_place, 2, 0, 1, 1);
+    _table.attach(_stroke, 2, 1, 1, 1);
+#else
     _table.attach(_fill_label, 0,1, 0,1, Gtk::FILL, Gtk::SHRINK);
     _table.attach(_stroke_label, 0,1, 1,2, Gtk::FILL, Gtk::SHRINK);
 
@@ -369,10 +387,17 @@ SelectedStyle::SelectedStyle(bool /*layout*/)
 
     _table.attach(_fill_place, 2,3, 0,1);
     _table.attach(_stroke, 2,3, 1,2);
+#endif
 
     _opacity_place.add(_opacity_label);
+
+#if WITH_GTKMM_3_0
+    _table.attach(_opacity_place, 4, 0, 1, 2);
+    _table.attach(_opacity_sb, 5, 0, 1, 2);
+#else
     _table.attach(_opacity_place, 4,5, 0,2, Gtk::SHRINK, Gtk::SHRINK);
     _table.attach(_opacity_sb, 5,6, 0,2, Gtk::SHRINK, Gtk::SHRINK);
+#endif
 
     pack_start(_table, true, true, 2);
 
diff --git a/src/ui/widget/selected-style.h b/src/ui/widget/selected-style.h
index fac4f22e6..6d5222429 100644
--- a/src/ui/widget/selected-style.h
+++ b/src/ui/widget/selected-style.h
@@ -11,8 +11,18 @@
 #ifndef INKSCAPE_UI_CURRENT_STYLE_H
 #define INKSCAPE_UI_CURRENT_STYLE_H
 
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <gtkmm/box.h>
-#include <gtkmm/table.h>
+
+#if WITH_GTKMM_3_0
+# include <gtkmm/grid.h>
+#else
+# include <gtkmm/table.h>
+#endif
+
 #include <gtkmm/label.h>
 #include <gtkmm/eventbox.h>
 #include <gtkmm/enums.h>
@@ -127,7 +137,11 @@ public:
 protected:
     SPDesktop *_desktop;
 
+#if WITH_GTKMM_3_0
+    Gtk::Grid _table;
+#else
     Gtk::Table _table;
+#endif
 
     Gtk::Label _fill_label;
     Gtk::Label _stroke_label;
diff --git a/src/ui/widget/spin-slider.cpp b/src/ui/widget/spin-slider.cpp
index 323b1209c..facbf704c 100644
--- a/src/ui/widget/spin-slider.cpp
+++ b/src/ui/widget/spin-slider.cpp
@@ -116,11 +116,20 @@ Gtk::Adjustment& SpinSlider::get_adjustment()
     return _adjustment;
 }
 
+#if WITH_GTKMM_3_0
+const Gtk::Scale& SpinSlider::get_scale() const
+#else
 const Gtk::HScale& SpinSlider::get_scale() const
+#endif
 {
     return _scale;
 }
+
+#if WITH_GTKMM_3_0
+Gtk::Scale& SpinSlider::get_scale()
+#else
 Gtk::HScale& SpinSlider::get_scale()
+#endif
 {
     return _scale;
 }
diff --git a/src/ui/widget/spin-slider.h b/src/ui/widget/spin-slider.h
index f4a62107b..8a45299e5 100644
--- a/src/ui/widget/spin-slider.h
+++ b/src/ui/widget/spin-slider.h
@@ -41,13 +41,14 @@ public:
 #if WITH_GTKMM_3_0
     const Glib::RefPtr<Gtk::Adjustment> get_adjustment() const;
     Glib::RefPtr<Gtk::Adjustment> get_adjustment();
+    const Gtk::Scale& get_scale() const;
+    Gtk::Scale& get_scale();
 #else
     const Gtk::Adjustment& get_adjustment() const;
     Gtk::Adjustment& get_adjustment();
-#endif
-    
     const Gtk::HScale& get_scale() const;
     Gtk::HScale& get_scale();
+#endif
 
     const Inkscape::UI::Widget::SpinButton& get_spin_button() const;
     Inkscape::UI::Widget::SpinButton& get_spin_button();
@@ -57,10 +58,11 @@ public:
 private:
 #if WITH_GTKMM_3_0
     Glib::RefPtr<Gtk::Adjustment> _adjustment;
+    Gtk::Scale _scale;
 #else
     Gtk::Adjustment _adjustment;
-#endif
     Gtk::HScale _scale;
+#endif
     Inkscape::UI::Widget::SpinButton _spin;
 };
 
diff --git a/src/ui/widget/tolerance-slider.cpp b/src/ui/widget/tolerance-slider.cpp
index 16558f0ee..f92a08d0a 100644
--- a/src/ui/widget/tolerance-slider.cpp
+++ b/src/ui/widget/tolerance-slider.cpp
@@ -73,8 +73,15 @@ void ToleranceSlider::init (const Glib::ustring& label1, const Glib::ustring& la
     theLabel1->set_use_underline();
     theLabel1->set_alignment(0, 0.5);
     // align the label with the checkbox text above by indenting 22 px.
-    _hbox->pack_start(*theLabel1, Gtk::PACK_EXPAND_WIDGET, 22); 
+    _hbox->pack_start(*theLabel1, Gtk::PACK_EXPAND_WIDGET, 22);
+
+#if WITH_GTKMM_3_0
+    _hscale = manage(new Gtk::Scale(Gtk::ORIENTATION_HORIZONTAL));
+    _hscale->set_range(1.0, 51.0);
+#else 
     _hscale = manage (new Gtk::HScale (1.0, 51, 1.0));
+#endif
+
     theLabel1->set_mnemonic_widget (*_hscale);
     _hscale->set_draw_value (true);
     _hscale->set_value_pos (Gtk::POS_RIGHT);
diff --git a/src/ui/widget/tolerance-slider.h b/src/ui/widget/tolerance-slider.h
index d0b78e3c1..2184cd52b 100644
--- a/src/ui/widget/tolerance-slider.h
+++ b/src/ui/widget/tolerance-slider.h
@@ -13,7 +13,12 @@
 #include <gtkmm/radiobuttongroup.h>
 
 namespace Gtk {
-	class RadioButton;
+class RadioButton;
+#if WITH_GTKMM_3_0
+class Scale;
+#else
+class HScale;
+#endif
 }
 
 namespace Inkscape {
@@ -55,7 +60,13 @@ protected:
     void on_toggled();
     void update (double val);
     Gtk::HBox         *_hbox;
+
+#if WITH_GTKMM_3_0
+    Gtk::Scale        *_hscale;
+#else
     Gtk::HScale       *_hscale;
+#endif
+
     Gtk::RadioButtonGroup _radio_button_group;
     Gtk::RadioButton  *_button1;
     Gtk::RadioButton  *_button2;
diff --git a/src/widgets/desktop-widget.cpp b/src/widgets/desktop-widget.cpp
index b0d8d974e..4af7c0795 100644
--- a/src/widgets/desktop-widget.cpp
+++ b/src/widgets/desktop-widget.cpp
@@ -357,6 +357,11 @@ void SPDesktopWidget::init( SPDesktopWidget *dtw )
 
         dtw->panels = new SwatchesPanel("/embedded/swatches");
         dtw->panels->setOrientation(SP_ANCHOR_SOUTH);
+
+#if GTK_CHECK_VERSION(3,0,0)
+        dtw->panels->set_vexpand(false);
+#endif
+
         gtk_box_pack_end( GTK_BOX( dtw->vbox ), GTK_WIDGET(dtw->panels->gobj()), FALSE, TRUE, 0 );
     }