add interface for disabling interaction during long-running operations

(bzr r1596)

7 files changed, 93 insertions, 1 deletions

diff --git a/src/desktop.cpp b/src/desktop.cpp
index 04328e84d..51580249e 100644
--- a/src/desktop.cpp
+++ b/src/desktop.cpp
@@ -8,7 +8,9 @@
  *   MenTaLguY <mental@rydia.net>
  *   bulia byak <buliabyak@users.sf.net>
  *   Ralf Stephan <ralf@ark.in-berlin.de>
+ *   John Bintz <jcoswell@coswellproductions.org>
  *
+ * Copyright (C) 2006 John Bintz
  * Copyright (C) 2004 MenTaLguY
  * Copyright (C) 1999-2002 Lauris Kaplinski
  * Copyright (C) 2000-2001 Ximian, Inc.
@@ -1028,6 +1030,17 @@ SPDesktop::updateNow()
   sp_canvas_update_now(canvas);
 }
 
+void
+SPDesktop::enableInteraction()
+{
+  _widget->enableInteraction();
+}
+
+void SPDesktop::disableInteraction()
+{
+  _widget->disableInteraction();
+}
+
 //----------------------------------------------------------------------
 // Callback implementations. The virtual ones are connected by the view.
 
diff --git a/src/desktop.h b/src/desktop.h
index 5e0b1f3a8..c9484f2fe 100644
--- a/src/desktop.h
+++ b/src/desktop.h
@@ -9,7 +9,9 @@
  *   Frank Felfe <innerspace@iname.com>
  *   bulia byak <buliabyak@users.sf.net>
  *   Ralf Stephan <ralf@ark.in-berlin.de>
+ *   John Bintz <jcoswell@coswellproductions.org>
  *
+ * Copyright (C) 2006 John Bintz
  * Copyright (C) 1999-2005 authors
  * Copyright (C) 2000-2001 Ximian, Inc.
  *
@@ -92,6 +94,7 @@ struct SPDesktop : public Inkscape::UI::View::View
     unsigned int dkey;
     unsigned int number;
     bool is_fullscreen;
+    unsigned int interaction_disabled_counter;
 
     /// \todo fixme: This has to be implemented in different way */
     guint guides_active : 1;
@@ -226,6 +229,9 @@ struct SPDesktop : public Inkscape::UI::View::View
     void updateNow();
     void updateCanvasNow();
     
+    void enableInteraction();
+    void disableInteraction();
+    
     void fullscreen();
 
     void registerEditWidget (Inkscape::UI::View::EditWidgetInterface *widget)
diff --git a/src/ui/view/edit-widget-interface.h b/src/ui/view/edit-widget-interface.h
index 605c72b59..7cc0133d3 100644
--- a/src/ui/view/edit-widget-interface.h
+++ b/src/ui/view/edit-widget-interface.h
@@ -5,7 +5,9 @@
  *
  * Authors:
  *     Ralf Stephan <ralf@ark.in-berlin.de> 
+ *     John Bintz <jcoswell@coswellproductions.org>
  *
+ * Copyright (C) 2006 John Bintz
  * Copyright (C) 2005 Ralf Stephan
  *
  * Released under GNU GPL.  Read the file 'COPYING' for more information.
@@ -73,6 +75,12 @@ struct EditWidgetInterface
     /// Force a redraw of the canvas
     virtual void requestCanvasUpdateAndWait() = 0;
     
+    /// Enable interaction on this desktop
+    virtual void enableInteraction() = 0;
+    
+    /// Disable interaction on this desktop
+    virtual void disableInteraction() = 0;
+    
     /// Update the "active desktop" indicator
     virtual void activateDesktop() = 0;
     
diff --git a/src/ui/view/edit-widget.cpp b/src/ui/view/edit-widget.cpp
index 6a4306147..83566c199 100644
--- a/src/ui/view/edit-widget.cpp
+++ b/src/ui/view/edit-widget.cpp
@@ -16,7 +16,9 @@
  *   Derek P. Moore <derekm@hackunix.org>
  *   Lauris Kaplinski <lauris@kaplinski.com>
  *   Frank Felfe <innerspace@iname.com>
+ *   John Bintz <jcoswell@coswellproductions.org>
  *
+ * Copyright (C) 2006 John Bintz
  * Copyright (C) 1999-2005 Authors
  * Copyright (C) 2000-2001 Ximian, Inc.
  *
@@ -74,7 +76,8 @@ EditWidget::EditWidget (SPDocument *doc)
       _act_grp(Gtk::ActionGroup::create()),
       _ui_mgr(Gtk::UIManager::create()),
       _update_s_f(false),
-      _update_a_f(false)
+      _update_a_f(false),
+      _interaction_disabled_counter(0)
 {
     g_warning("Creating new EditWidget");
 
@@ -1303,6 +1306,28 @@ EditWidget::requestCanvasUpdateAndWait()
 }
 
 void
+EditWidget::enableInteraction()
+{
+  g_return_if_fail(_interaction_disabled_counter > 0);
+  
+  _interaction_disabled_counter--;
+  
+  if (_interaction_disabled_counter == 0) {
+    this->set_sensitive(true);
+  }
+}
+
+void
+EditWidget::disableInteraction()
+{
+  if (_interaction_disabled_counter == 0) {
+    this->set_sensitive(false);
+  }
+  
+  _interaction_disabled_counter++;
+}
+
+void
 EditWidget::activateDesktop()
 {
     /// \todo active_desktop_indicator not implemented
diff --git a/src/ui/view/edit-widget.h b/src/ui/view/edit-widget.h
index 096137c2a..55a52be4c 100644
--- a/src/ui/view/edit-widget.h
+++ b/src/ui/view/edit-widget.h
@@ -6,7 +6,9 @@
  *   Bryce W. Harrington <bryce@bryceharrington.org>
  *   Derek P. Moore <derekm@hackunix.org>
  *   Ralf Stephan <ralf@ark.in-berlin.de>
+ *   John Bintz <jcoswell@coswellproductions.org>
  *
+ * Copyright (C) 2006 John Bintz
  * Copyright (C) 2004 Bryce Harrington
  *
  * Released under GNU GPL.  Read the file 'COPYING' for more information.
@@ -109,6 +111,8 @@ public:
     virtual void destroy();
     virtual void requestCanvasUpdate();
     virtual void requestCanvasUpdateAndWait();
+    virtual void enableInteraction();
+    virtual void disableInteraction();
     virtual void activateDesktop();
     virtual void deactivateDesktop();
     virtual void viewSetPosition (NR::Point p);
@@ -193,6 +197,7 @@ private:
     void onAdjValueChanged();
 
     bool _update_s_f, _update_a_f;
+    unsigned int _interaction_disabled_counter;
 
     sigc::connection _namedview_modified_connection;
 };
diff --git a/src/widgets/desktop-widget.cpp b/src/widgets/desktop-widget.cpp
index 795fdb0f8..9ede6f27e 100644
--- a/src/widgets/desktop-widget.cpp
+++ b/src/widgets/desktop-widget.cpp
@@ -8,7 +8,9 @@
  *   MenTaLguY <mental@rydia.net>
  *   bulia byak <buliabyak@users.sf.net>
  *   Ralf Stephan <ralf@ark.in-berlin.de>
+ *   John Bintz <jcoswell@coswellproductions.org>
  *
+ * Copyright (C) 2006 John Bintz
  * Copyright (C) 2004 MenTaLguY
  * Copyright (C) 1999-2002 Lauris Kaplinski
  * Copyright (C) 2000-2001 Ximian, Inc.
@@ -171,6 +173,8 @@ sp_desktop_widget_init (SPDesktopWidget *dtw)
     
     dtw->desktop = NULL;
 
+    dtw->_interaction_disabled_counter = 0;
+    
     dtw->tt = gtk_tooltips_new ();
 
     /* Main table */
@@ -669,6 +673,28 @@ SPDesktopWidget::requestCanvasUpdateAndWait() {
 
 }
 
+void
+SPDesktopWidget::enableInteraction()
+{
+  g_return_if_fail(_interaction_disabled_counter > 0);
+  
+  _interaction_disabled_counter--;
+  
+  if (_interaction_disabled_counter == 0) {
+    gtk_widget_set_sensitive(GTK_WIDGET(this), TRUE);
+  }
+}
+
+void
+SPDesktopWidget::disableInteraction()
+{
+  if (_interaction_disabled_counter == 0) {
+    gtk_widget_set_sensitive(GTK_WIDGET(this), FALSE);
+  }
+  
+  _interaction_disabled_counter++;
+}
+
 void 
 SPDesktopWidget::setCoordinateStatus(NR::Point p)
 {
diff --git a/src/widgets/desktop-widget.h b/src/widgets/desktop-widget.h
index 409f38a8d..0514dd393 100644
--- a/src/widgets/desktop-widget.h
+++ b/src/widgets/desktop-widget.h
@@ -5,6 +5,7 @@
  * SPDesktopWidget: handling Gtk events on a desktop.
  *
  * Authors:
+ *      John Bintz <jcoswell@coswellproductions.org> (c) 2006
  *      Ralf Stephan <ralf@ark.in-berlin.de> (c) 2005, distrib. under GPL2
  *      ? -2004
  */
@@ -92,6 +93,8 @@ struct SPDesktopWidget {
     Inkscape::UI::Widget::SelectedStyle *selected_style;
 
     gint coord_status_id, select_status_id;
+    
+    unsigned int _interaction_disabled_counter;
 
     SPCanvas *canvas;
     NR::Point ruler_origin;
@@ -135,6 +138,10 @@ struct SPDesktopWidget {
             { _dtw->requestCanvasUpdate(); }
         virtual void requestCanvasUpdateAndWait()
             { _dtw->requestCanvasUpdateAndWait(); }
+        virtual void enableInteraction()
+            { _dtw->enableInteraction(); }
+        virtual void disableInteraction()
+            { _dtw->disableInteraction(); }
         virtual void activateDesktop()
             { sp_dtw_desktop_activate (_dtw); }
         virtual void deactivateDesktop()
@@ -186,6 +193,8 @@ struct SPDesktopWidget {
     void setCoordinateStatus(NR::Point p);
     void requestCanvasUpdate();
     void requestCanvasUpdateAndWait();
+    void enableInteraction();
+    void disableInteraction();
     void updateTitle(gchar const *uri);
 };