tweak tool

(bzr r3423)

1 files changed, 751 insertions, 0 deletions

diff --git a/src/tweak-context.cpp b/src/tweak-context.cpp
new file mode 100644
index 000000000..6a951901e
--- /dev/null
+++ b/src/tweak-context.cpp
@@ -0,0 +1,751 @@
+#define __SP_TWEAK_CONTEXT_C__
+
+/*
+ * tweaking paths without node editing
+ *
+ * Authors:
+ *   bulia byak 
+ *
+ * Copyright (C) 2007 authors
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#define noTWEAK_VERBOSE
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+#include <gdk/gdkkeysyms.h>
+#include <glibmm/i18n.h>
+
+#include <numeric>
+
+#include "svg/svg.h"
+#include "display/canvas-bpath.h"
+#include "display/bezier-utils.h"
+
+#include <glib/gmem.h>
+#include "macros.h"
+#include "document.h"
+#include "selection.h"
+#include "desktop.h"
+#include "desktop-events.h"
+#include "desktop-handles.h"
+#include "desktop-affine.h"
+#include "desktop-style.h"
+#include "message-context.h"
+#include "pixmaps/cursor-thin.xpm"
+#include "pixmaps/cursor-thicken.xpm"
+#include "pixmaps/cursor-push.xpm"
+#include "pixmaps/cursor-roughen.xpm"
+#include "libnr/n-art-bpath.h"
+#include "libnr/nr-path.h"
+#include "libnr/nr-matrix-ops.h"
+#include "libnr/nr-scale-translate-ops.h"
+#include "xml/repr.h"
+#include "context-fns.h"
+#include "sp-item.h"
+#include "inkscape.h"
+#include "color.h"
+#include "splivarot.h"
+#include "sp-item-group.h"
+#include "sp-shape.h"
+#include "sp-path.h"
+#include "path-chemistry.h"
+#include "sp-text.h"
+#include "sp-flowtext.h"
+#include "display/canvas-bpath.h"
+#include "display/canvas-arena.h"
+#include "livarot/Shape.h"
+#include "isnan.h"
+#include "prefs-utils.h"
+
+#include "tweak-context.h"
+
+#define DDC_RED_RGBA 0xff0000ff
+
+#define DYNA_MIN_WIDTH 1.0e-6
+
+// FIXME: move it to some shared file to be reused by both calligraphy and dropper
+#define C1 0.552
+static NArtBpath const hatch_area_circle[] = {
+    { NR_MOVETO, 0, 0, 0, 0, -1, 0 },
+    { NR_CURVETO, -1, C1, -C1, 1, 0, 1 },
+    { NR_CURVETO, C1, 1, 1, C1, 1, 0 },
+    { NR_CURVETO, 1, -C1, C1, -1, 0, -1 },
+    { NR_CURVETO, -C1, -1, -1, -C1, -1, 0 },
+    { NR_END, 0, 0, 0, 0, 0, 0 }
+};
+#undef C1
+
+
+static void sp_tweak_context_class_init(SPTweakContextClass *klass);
+static void sp_tweak_context_init(SPTweakContext *ddc);
+static void sp_tweak_context_dispose(GObject *object);
+
+static void sp_tweak_context_setup(SPEventContext *ec);
+static void sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
+static gint sp_tweak_context_root_handler(SPEventContext *ec, GdkEvent *event);
+
+static SPEventContextClass *parent_class;
+
+GtkType
+sp_tweak_context_get_type(void)
+{
+    static GType type = 0;
+    if (!type) {
+        GTypeInfo info = {
+            sizeof(SPTweakContextClass),
+            NULL, NULL,
+            (GClassInitFunc) sp_tweak_context_class_init,
+            NULL, NULL,
+            sizeof(SPTweakContext),
+            4,
+            (GInstanceInitFunc) sp_tweak_context_init,
+            NULL,   /* value_table */
+        };
+        type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTweakContext", &info, (GTypeFlags)0);
+    }
+    return type;
+}
+
+static void
+sp_tweak_context_class_init(SPTweakContextClass *klass)
+{
+    GObjectClass *object_class = (GObjectClass *) klass;
+    SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
+
+    parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
+
+    object_class->dispose = sp_tweak_context_dispose;
+
+    event_context_class->setup = sp_tweak_context_setup;
+    event_context_class->set = sp_tweak_context_set;
+    event_context_class->root_handler = sp_tweak_context_root_handler;
+}
+
+static void
+sp_tweak_context_init(SPTweakContext *tc)
+{
+    SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
+
+    event_context->cursor_shape = cursor_push_xpm;
+    event_context->hot_x = 4;
+    event_context->hot_y = 4;
+
+    /* attributes */
+    tc->dragging = FALSE;
+
+    tc->width = 0.2;
+    tc->force = 0.2;
+    tc->pressure = TC_DEFAULT_PRESSURE;
+
+    tc->is_dilating = false;
+    tc->has_dilated = false;
+}
+
+static void
+sp_tweak_context_dispose(GObject *object)
+{
+    SPTweakContext *tc = SP_TWEAK_CONTEXT(object);
+
+    if (tc->dilate_area) {
+        gtk_object_destroy(GTK_OBJECT(tc->dilate_area));
+        tc->dilate_area = NULL;
+    }
+
+    if (tc->_message_context) {
+        delete tc->_message_context;
+    }
+
+    G_OBJECT_CLASS(parent_class)->dispose(object);
+}
+
+void
+sp_tweak_update_cursor (SPTweakContext *tc, gint mode)
+{
+    SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
+   switch (mode) {
+       case TWEAK_MODE_PUSH:
+           event_context->cursor_shape = cursor_push_xpm;
+           break;
+       case TWEAK_MODE_SUCK:
+           event_context->cursor_shape = cursor_thin_xpm;
+           break;
+       case TWEAK_MODE_BLOW:
+           event_context->cursor_shape = cursor_thicken_xpm;
+           break;
+       case TWEAK_MODE_ROUGHEN:
+           event_context->cursor_shape = cursor_roughen_xpm;
+           break;
+   }
+   sp_event_context_update_cursor(event_context);
+}
+
+static void
+sp_tweak_context_setup(SPEventContext *ec)
+{
+    SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
+
+    if (((SPEventContextClass *) parent_class)->setup)
+        ((SPEventContextClass *) parent_class)->setup(ec);
+
+    {
+        SPCurve *c = sp_curve_new_from_foreign_bpath(hatch_area_circle);
+        tc->dilate_area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);
+        sp_curve_unref(c);
+        sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(tc->dilate_area), 0x00000000,(SPWindRule)0);
+        sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(tc->dilate_area), 0xff9900ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
+        sp_canvas_item_hide(tc->dilate_area);
+    }
+
+    sp_event_context_read(ec, "width");
+    sp_event_context_read(ec, "mode");
+    sp_event_context_read(ec, "fidelity");
+    sp_event_context_read(ec, "force");
+    sp_event_context_read(ec, "usepressure");
+
+    tc->is_drawing = false;
+
+    tc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
+}
+
+static void
+sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
+{
+    SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
+
+    if (!strcmp(key, "width")) {
+        double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );
+        tc->width = CLAMP(dval, -1000.0, 1000.0);
+    } else if (!strcmp(key, "mode")) {
+        gint64 const dval = ( val ? g_ascii_strtoll (val, NULL, 10) : 0 );
+        tc->mode = dval;
+        sp_tweak_update_cursor(tc, tc->mode);
+    } else if (!strcmp(key, "fidelity")) {
+        double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0 );
+        tc->fidelity = CLAMP(dval, 0.0, 1.0);
+    } else if (!strcmp(key, "force")) {
+        double const dval = ( val ? g_ascii_strtod (val, NULL) : 1.0 );
+        tc->force = CLAMP(dval, 0, 1.0);
+    } else if (!strcmp(key, "usepressure")) {
+        tc->usepressure = (val && strcmp(val, "0"));
+    } 
+}
+
+static void
+sp_tweak_extinput(SPTweakContext *tc, GdkEvent *event)
+{
+    if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &tc->pressure))
+        tc->pressure = CLAMP (tc->pressure, TC_MIN_PRESSURE, TC_MAX_PRESSURE);
+    else
+        tc->pressure = TC_DEFAULT_PRESSURE;
+}
+
+double
+get_dilate_radius (SPTweakContext *tc)
+{
+    // 10 times the pen width:
+    return 500 * tc->width/SP_EVENT_CONTEXT(tc)->desktop->current_zoom(); 
+}
+
+double
+get_dilate_force (SPTweakContext *tc)
+{
+    double force = 8 * (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE)
+        /sqrt(SP_EVENT_CONTEXT(tc)->desktop->current_zoom()); 
+    if (force > 3) {
+        force += 4 * (force - 3);
+    }
+    return force * tc->force;
+}
+
+bool
+sp_tweak_dilate_recursive (Inkscape::Selection *selection, SPItem *item, NR::Point p, NR::Point vector, gint mode, double radius, double force, double fidelity)
+{
+    bool did = false;
+
+    if (SP_IS_GROUP(item)) {
+        for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
+            if (SP_IS_ITEM(child)) {
+                if (sp_tweak_dilate_recursive (selection, SP_ITEM(child), p, vector, mode, radius, force, fidelity))
+                    did = true;
+            }
+        }
+
+    } else if (SP_IS_PATH(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
+
+        Inkscape::XML::Node *newrepr = NULL;
+        gint pos = 0;
+        Inkscape::XML::Node *parent = NULL;
+        char const *id = NULL;
+        if (!SP_IS_PATH(item)) {
+            newrepr = sp_selected_item_to_curved_repr(item, 0);
+            if (!newrepr)
+                return false;
+
+            // remember the position of the item
+            pos = SP_OBJECT_REPR(item)->position();
+            // remember parent
+            parent = SP_OBJECT_REPR(item)->parent();
+            // remember id
+            id = SP_OBJECT_REPR(item)->attribute("id");
+        }
+
+
+        // skip those paths whose bboxes are entirely out of reach with our radius
+        NR::Maybe<NR::Rect> bbox = item->getBounds(sp_item_i2doc_affine(item));
+        if (bbox) {
+            bbox->growBy(radius);
+            if (!bbox->contains(p)) {
+                return false;
+            }
+        }
+
+        Path *orig = Path_for_item(item, false);
+        if (orig == NULL) {
+            return false;
+        }
+        Path *res = new Path;
+        res->SetBackData(false);
+
+        Shape *theShape = new Shape;
+        Shape *theRes = new Shape;
+
+        orig->ConvertWithBackData(0.08 - (0.07 * fidelity)); // default 0.059
+        orig->Fill(theShape, 0);
+
+        SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
+        gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
+        if (val && strcmp(val, "nonzero") == 0)
+        {
+            theRes->ConvertToShape(theShape, fill_nonZero);
+        }
+        else if (val && strcmp(val, "evenodd") == 0)
+        {
+            theRes->ConvertToShape(theShape, fill_oddEven);
+        }
+        else
+        {
+            theRes->ConvertToShape(theShape, fill_nonZero);
+        }
+
+        if (NR::L2(vector) != 0)
+            vector = 1/NR::L2(vector) * vector;
+
+        bool did_this = false;
+        NR::Matrix i2doc(sp_item_i2doc_affine(item));
+        if (mode == TWEAK_MODE_SUCK || mode == TWEAK_MODE_BLOW) {
+            if (theShape->MakeOffset(theRes, 
+                                 mode == TWEAK_MODE_BLOW? force : -force,
+                                 join_straight, 4.0,
+                                 true, p[NR::X], p[NR::Y], radius, &i2doc) == 0) // 0 means the shape was actually changed
+              did_this = true;
+        } else if (mode == TWEAK_MODE_PUSH) {
+            if (theShape->MakePush(theRes, 
+                                 join_straight, 4.0,
+                                 true, p, force*2*vector, radius, &i2doc) == 0)
+              did_this = true;
+        } else if (mode == TWEAK_MODE_ROUGHEN) {
+            if (theShape->MakeJitter(theRes, 
+                                 join_straight, 4.0,
+                                 true, p, force, radius, &i2doc) == 0)
+              did_this = true;
+        }
+
+        // the rest only makes sense if we actually changed the path
+        if (did_this) {
+            theRes->ConvertToShape(theShape, fill_positive);
+
+            res->Reset();
+            theRes->ConvertToForme(res);
+
+            double th_max = 0.6 - 0.59*sqrt(fidelity);
+            double threshold = MAX(th_max, th_max*force);
+            res->ConvertEvenLines(threshold);
+            res->Simplify(threshold);
+
+            if (newrepr) { // converting to path, need to replace the repr
+                bool is_selected = selection->includes(item);
+                selection->remove(item);
+
+                // It's going to resurrect, so we delete without notifying listeners.
+                SP_OBJECT(item)->deleteObject(false);
+
+                // restore id
+                newrepr->setAttribute("id", id);
+                // add the new repr to the parent
+                parent->appendChild(newrepr);
+                // move to the saved position
+                newrepr->setPosition(pos > 0 ? pos : 0);
+
+                if (is_selected)
+                    selection->add(newrepr);
+            }
+
+            if (res->descr_cmd.size() > 1) { 
+                gchar *str = res->svg_dump_path();
+                if (newrepr)
+                    newrepr->setAttribute("d", str);
+                else
+                    SP_OBJECT_REPR(item)->setAttribute("d", str);
+                g_free(str);
+            } else {
+                // TODO: if there's 0 or 1 node left, delete this path altogether
+            }
+
+            if (newrepr) {
+                Inkscape::GC::release(newrepr);
+                newrepr = NULL;
+            }
+        }
+
+        delete theShape;
+        delete theRes;
+        delete orig;
+        delete res;
+
+        if (did_this) 
+            did = true;
+    }
+
+    return did;
+}
+
+
+bool
+sp_tweak_dilate (SPTweakContext *tc, NR::Point p, NR::Point vector)
+{
+    Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(tc)->desktop);
+
+    if (selection->isEmpty()) {
+        return false;
+    }
+
+    bool did = false;
+    double radius = get_dilate_radius(tc); 
+    double force = get_dilate_force(tc); 
+    if (radius == 0 || force == 0) {
+        return false;
+    }
+
+    for (GSList *items = g_slist_copy((GSList *) selection->itemList());
+         items != NULL;
+         items = items->next) {
+
+        SPItem *item = (SPItem *) items->data;
+
+        if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, force, tc->fidelity))
+            did = true;
+
+    }
+
+    return did;
+}
+
+void
+sp_tweak_update_area (SPTweakContext *tc)
+{
+        double radius = get_dilate_radius(tc);
+        NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(SP_EVENT_CONTEXT(tc)->desktop->point()));
+        sp_canvas_item_affine_absolute(tc->dilate_area, sm);
+        sp_canvas_item_show(tc->dilate_area);
+}
+
+void
+sp_tweak_switch_mode (SPTweakContext *tc, gint mode)
+{
+    SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
+    // need to set explicitly, because the prefs may not have changed by the previous
+    tc->mode = mode;
+    sp_tweak_update_cursor (tc, mode);
+}
+
+void
+sp_tweak_switch_mode_temporarily (SPTweakContext *tc, gint mode)
+{
+   // Juggling about so that prefs have the old value but tc->mode and the button show new mode:
+   gint now_mode = prefs_get_int_attribute("tools.tweak", "mode", 0);
+   SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
+   sp_tweak_update_cursor (tc, mode);
+   // button has changed prefs, restore
+   prefs_set_int_attribute("tools.tweak", "mode", now_mode);
+   // changing prefs changed tc->mode, restore back :)
+   tc->mode = mode;
+}
+
+gint
+sp_tweak_context_root_handler(SPEventContext *event_context,
+                                  GdkEvent *event)
+{
+    SPTweakContext *tc = SP_TWEAK_CONTEXT(event_context);
+    SPDesktop *desktop = event_context->desktop;
+
+    gint ret = FALSE;
+
+    switch (event->type) {
+        case GDK_BUTTON_PRESS:
+            if (event->button.button == 1 && !event_context->space_panning) {
+
+                if (Inkscape::have_viable_layer(desktop, tc->_message_context) == false) {
+                    return TRUE;
+                }
+
+                NR::Point const button_w(event->button.x,
+                                         event->button.y);
+                NR::Point const button_dt(desktop->w2d(button_w));
+                tc->last_push = desktop->dt2doc(button_dt);
+
+                sp_tweak_extinput(tc, event);
+
+                sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);
+                tc->is_drawing = true;
+                tc->is_dilating = true;
+                tc->has_dilated = false;
+
+                ret = TRUE;
+            }
+            break;
+        case GDK_MOTION_NOTIFY:
+        {
+            NR::Point const motion_w(event->motion.x,
+                                     event->motion.y);
+            NR::Point motion_dt(desktop->w2d(motion_w));
+            NR::Point motion_doc(desktop->dt2doc(motion_dt));
+            sp_tweak_extinput(tc, event);
+
+            // draw the dilating cursor
+                double radius = get_dilate_radius(tc);
+                NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(desktop->w2d(motion_w)));
+                sp_canvas_item_affine_absolute(tc->dilate_area, sm);
+                sp_canvas_item_show(tc->dilate_area);
+
+                guint num = 0;
+                if (!desktop->selection->isEmpty()) {
+                    num = g_slist_length((GSList *) desktop->selection->itemList());
+                }
+                if (num == 0) {
+                    tc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Select paths</b> to tweak"));
+                } else {
+                    switch (tc->mode) {
+                        case TWEAK_MODE_PUSH:
+                           tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
+                                                      _("<b>Pushing %d</b> selected path(s)"), num);  
+                           break;
+                        case TWEAK_MODE_SUCK:
+                           tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
+                                                      _("<b>Melting %d</b> selected path(s)"), num);
+                           break;
+                        case TWEAK_MODE_BLOW:
+                           tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
+                                                      _("<b>Blowing %d</b> selected path(s)"), num);
+                           break;
+                        case TWEAK_MODE_ROUGHEN:
+                           tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
+                                                      _("<b>Roughening %d</b> selected path(s)"), num);
+                           break;
+                    }
+                }
+
+
+            // dilating:
+            if (tc->is_drawing && ( event->motion.state & GDK_BUTTON1_MASK )) {  
+                sp_tweak_dilate (tc, motion_doc, motion_doc - tc->last_push);
+                //tc->last_push = motion_doc;
+                tc->has_dilated = true;
+                // it's slow, so prevent clogging up with events
+                gobble_motion_events(GDK_BUTTON1_MASK);
+                return TRUE;
+            }
+
+        }
+        break;
+
+
+    case GDK_BUTTON_RELEASE:
+    {
+        NR::Point const motion_w(event->button.x, event->button.y);
+        NR::Point const motion_dt(desktop->w2d(motion_w));
+
+        sp_canvas_end_forced_full_redraws(desktop->canvas);
+        tc->is_drawing = false;
+
+        if (tc->is_dilating && event->button.button == 1 && !event_context->space_panning) {
+            if (!tc->has_dilated) {
+                // if we did not rub, do a light tap
+                tc->pressure = 0.03;
+                sp_tweak_dilate (tc, desktop->dt2doc(motion_dt), NR::Point(0,0));
+            }
+            tc->is_dilating = false;
+            tc->has_dilated = false;
+            sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop), 
+                         SP_VERB_CONTEXT_TWEAK,
+                             (tc->mode==TWEAK_MODE_BLOW ? _("Blow tweak") : (tc->mode==TWEAK_MODE_SUCK ? _("Melt tweak") : (tc->mode==TWEAK_MODE_PUSH ? _("Push tweak") : _("Roughen tweak")))));
+            ret = TRUE;
+
+        } 
+        break;
+    }
+
+    case GDK_KEY_PRESS:
+        switch (get_group0_keyval (&event->key)) {
+        case GDK_p:
+        case GDK_P:
+        case GDK_1:
+            if (MOD__SHIFT_ONLY) {
+                sp_tweak_switch_mode(tc, TWEAK_MODE_PUSH);
+                ret = TRUE;
+            }
+            break;
+        case GDK_m:
+        case GDK_M:
+        case GDK_2:
+            if (MOD__SHIFT_ONLY) {
+                sp_tweak_switch_mode(tc, TWEAK_MODE_SUCK);
+                ret = TRUE;
+            }
+            break;
+        case GDK_b:
+        case GDK_B:
+        case GDK_3:
+            if (MOD__SHIFT_ONLY) {
+                sp_tweak_switch_mode(tc, TWEAK_MODE_BLOW);
+                ret = TRUE;
+            }
+            break;
+        case GDK_r:
+        case GDK_R:
+        case GDK_4:
+            if (MOD__SHIFT_ONLY) {
+                sp_tweak_switch_mode(tc, TWEAK_MODE_ROUGHEN);
+                ret = TRUE;
+            }
+            break;
+
+        case GDK_Up:
+        case GDK_KP_Up:
+            if (!MOD__CTRL_ONLY) {
+                tc->force += 0.05;
+                if (tc->force > 1.0)
+                    tc->force = 1.0;
+                desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
+                ret = TRUE;
+            }
+            break;
+        case GDK_Down:
+        case GDK_KP_Down:
+            if (!MOD__CTRL_ONLY) {
+                tc->force -= 0.05;
+                if (tc->force < 0.0)
+                    tc->force = 0.0;
+                desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
+                ret = TRUE;
+            }
+            break;
+        case GDK_Right:
+        case GDK_KP_Right:
+            if (!MOD__CTRL_ONLY) {
+                tc->width += 0.01;
+                if (tc->width > 1.0)
+                    tc->width = 1.0;
+                desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100); // the same spinbutton is for alt+x
+                sp_tweak_update_area(tc);
+                ret = TRUE;
+            }
+            break;
+        case GDK_Left:
+        case GDK_KP_Left:
+            if (!MOD__CTRL_ONLY) {
+                tc->width -= 0.01;
+                if (tc->width < 0.01)
+                    tc->width = 0.01;
+                desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
+                sp_tweak_update_area(tc);
+                ret = TRUE;
+            }
+            break;
+        case GDK_Home:
+        case GDK_KP_Home:
+            tc->width = 0.01;
+            desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
+            sp_tweak_update_area(tc);
+            ret = TRUE;
+            break;
+        case GDK_End:
+        case GDK_KP_End:
+            tc->width = 1.0;
+            desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
+            sp_tweak_update_area(tc);
+            ret = TRUE;
+            break;
+        case GDK_x:
+        case GDK_X:
+            if (MOD__ALT_ONLY) {
+                desktop->setToolboxFocusTo ("altx-tweak");
+                ret = TRUE;
+            }
+            break;
+
+        case GDK_Control_L:
+        case GDK_Control_R:
+            if (MOD__SHIFT) {
+                sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_BLOW);
+            } else {
+                sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SUCK);
+            }
+            break;
+        case GDK_Shift_L:
+        case GDK_Shift_R:
+            if (MOD__CTRL) {
+                sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_BLOW);
+            }
+            break;
+        default:
+            break;
+        }
+        break;
+
+    case GDK_KEY_RELEASE:
+        switch (get_group0_keyval(&event->key)) {
+            case GDK_Control_L:
+            case GDK_Control_R:
+                sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
+                tc->_message_context->clear();
+                break;
+            case GDK_Shift_L:
+            case GDK_Shift_R:
+                if (MOD__CTRL) {
+                    sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SUCK);
+                }
+                break;
+            break;
+            default:
+                sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
+                break;
+        }
+
+    default:
+        break;
+    }
+
+    if (!ret) {
+        if (((SPEventContextClass *) parent_class)->root_handler) {
+            ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
+        }
+    }
+
+    return ret;
+}
+
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :