Code

Avoid crash by uninitialized perspectives.
[inkscape.git] / src / display / snap-indicator.cpp
index e48f48cedb77823530a3cc241295ba0509a76f63..84bc1709bea9d0ea7c01f962b7180674c055889f 100644 (file)
@@ -5,8 +5,8 @@
  *   Johan Engelen
  *   Diederik van Lierop
  *
- * Copyright (C) Johan Engelen 2008 <j.b.c.engelen@utwente.nl>
- * Copyright (C) Diederik van Lierop 2008 <mail@diedenrezi.nl>
+ * Copyright (C) Johan Engelen 2009 <j.b.c.engelen@utwente.nl>
+ * Copyright (C) Diederik van Lierop 2009 <mail@diedenrezi.nl>
  *
  * Released under GNU GPL, read the file 'COPYING' for more information
  */
 #include "desktop.h"
 #include "desktop-handles.h"
 #include "display/sodipodi-ctrl.h"
+#include "display/canvas-text.h"
 #include "knot.h"
 #include "preferences.h"
+#include <glibmm/i18n.h>
 
 namespace Inkscape {
 namespace Display {
 
 SnapIndicator::SnapIndicator(SPDesktop * desktop)
     :   _snaptarget(NULL),
-       _snapsource(NULL),
+        _snaptarget_tooltip(NULL),
+        _snapsource(NULL),
         _desktop(desktop)
 {
 }
@@ -32,44 +35,216 @@ SnapIndicator::SnapIndicator(SPDesktop * desktop)
 SnapIndicator::~SnapIndicator()
 {
     // remove item that might be present
-       remove_snaptarget();
-       remove_snapsource();
+    remove_snaptarget();
+    remove_snapsource();
 }
 
 void
-SnapIndicator::set_new_snaptarget(Inkscape::SnappedPoint const p)
+SnapIndicator::set_new_snaptarget(Inkscape::SnappedPoint const &p)
 {
-       remove_snaptarget();
-    
+    remove_snaptarget(); //only display one snaptarget at a time
+
     g_assert(_desktop != NULL);
-    
-    /* Commented out for now, because this might hide any snapping bug!
+
     if (!p.getSnapped()) {
-       return; // If we haven't snapped, then it is of no use to draw a snapindicator
+        g_warning("No snapping took place, so no snap target will be displayed");
+        return; // If we haven't snapped, then it is of no use to draw a snapindicator
     }
-    */
-    
+
     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
     bool value = prefs->getBool("/options/snapindicator/value", true);
-       
+
     if (value) {
-        // TODO add many different kinds of snap indicator :-)
-        // For this we should use p->getTarget() to find out what has snapped 
-        // and adjust the shape of the snapindicator accordingly, e.g. a cross
-        // when snapping to an intersection, a circle when snapping to a node, etc. 
-        SPCanvasItem * canvasitem = sp_canvas_item_new( sp_desktop_tempgroup (_desktop),
-                                                        SP_TYPE_CTRL,
-                                                        "anchor", GTK_ANCHOR_CENTER,
-                                                        "size", 10.0,
-                                                        "stroked", TRUE,
-                                                        "stroke_color", 0xf000f0ff,
-                                                        "mode", SP_KNOT_MODE_XOR,
-                                                        "shape", SP_KNOT_SHAPE_CROSS,
-                                                        NULL );        
-        
-        SP_CTRL(canvasitem)->moveto(p.getPoint());
+        // TRANSLATORS: undefined target for snapping
+        gchar *target_name = _("UNDEFINED");
+        switch (p.getTarget()) {
+            case SNAPTARGET_UNDEFINED:
+                target_name = _("UNDEFINED");
+                break;
+            case SNAPTARGET_GRID:
+                target_name = _("grid line");
+                break;
+            case SNAPTARGET_GRID_INTERSECTION:
+                target_name = _("grid intersection");
+                break;
+            case SNAPTARGET_GUIDE:
+                target_name = _("guide");
+                break;
+            case SNAPTARGET_GUIDE_INTERSECTION:
+                target_name = _("guide intersection");
+                break;
+            case SNAPTARGET_GUIDE_ORIGIN:
+                target_name = _("guide origin");
+                break;
+            case SNAPTARGET_GRID_GUIDE_INTERSECTION:
+                target_name = _("grid-guide intersection");
+                break;
+            case SNAPTARGET_NODE_CUSP:
+                target_name = _("cusp node");
+                break;
+            case SNAPTARGET_NODE_SMOOTH:
+                target_name = _("smooth node");
+                break;
+            case SNAPTARGET_PATH:
+                target_name = _("path");
+                break;
+            case SNAPTARGET_PATH_INTERSECTION:
+                target_name = _("path intersection");
+                break;
+            case SNAPTARGET_BBOX_CORNER:
+                target_name = _("bounding box corner");
+                break;
+            case SNAPTARGET_BBOX_EDGE:
+                target_name = _("bounding box side");
+                break;
+            case SNAPTARGET_PAGE_BORDER:
+                target_name = _("page border");
+                break;
+            case SNAPTARGET_LINE_MIDPOINT:
+                target_name = _("line midpoint");
+                break;
+            case SNAPTARGET_OBJECT_MIDPOINT:
+                target_name = _("object midpoint");
+                break;
+            case SNAPTARGET_ROTATION_CENTER:
+                target_name = _("object rotation center");
+                break;
+            case SNAPTARGET_HANDLE:
+                target_name = _("handle");
+                break;
+            case SNAPTARGET_BBOX_EDGE_MIDPOINT:
+                target_name = _("bounding box side midpoint");
+                break;
+            case SNAPTARGET_BBOX_MIDPOINT:
+                target_name = _("bounding box midpoint");
+                break;
+            case SNAPTARGET_PAGE_CORNER:
+                target_name = _("page corner");
+                break;
+            case SNAPTARGET_CONVEX_HULL_CORNER:
+                target_name = _("convex hull corner");
+                break;
+            case SNAPTARGET_ELLIPSE_QUADRANT_POINT:
+                target_name = _("quadrant point");
+                break;
+            case SNAPTARGET_CENTER:
+                target_name = _("center");
+                break;
+            case SNAPTARGET_CORNER:
+                target_name = _("corner");
+                break;
+            case SNAPTARGET_TEXT_BASELINE:
+                target_name = _("text baseline");
+                break;
+            case SNAPTARGET_CONSTRAINED_ANGLE:
+                target_name = _("constrained angle");
+                break;
+            default:
+                g_warning("Snap target has not yet been defined!");
+                break;
+        }
+
+        gchar *source_name = _("UNDEFINED");
+        switch (p.getSource()) {
+            case SNAPSOURCE_UNDEFINED:
+                source_name = _("UNDEFINED");
+                break;
+            case SNAPSOURCE_BBOX_CORNER:
+                source_name = _("Bounding box corner");
+                break;
+            case SNAPSOURCE_BBOX_MIDPOINT:
+                source_name = _("Bounding box midpoint");
+                break;
+            case SNAPSOURCE_BBOX_EDGE_MIDPOINT:
+                source_name = _("Bounding box side midpoint");
+                break;
+            case SNAPSOURCE_NODE_SMOOTH:
+                source_name = _("Smooth node");
+                break;
+            case SNAPSOURCE_NODE_CUSP:
+                source_name = _("Cusp node");
+                break;
+            case SNAPSOURCE_LINE_MIDPOINT:
+                source_name = _("Line midpoint");
+                break;
+            case SNAPSOURCE_OBJECT_MIDPOINT:
+                source_name = _("Object midpoint");
+                break;
+            case SNAPSOURCE_ROTATION_CENTER:
+                source_name = _("Object rotation center");
+                break;
+            case SNAPSOURCE_HANDLE:
+                source_name = _("Handle");
+                break;
+            case SNAPSOURCE_PATH_INTERSECTION:
+                source_name = _("Path intersection");
+                break;
+            case SNAPSOURCE_GUIDE:
+                source_name = _("Guide");
+                break;
+            case SNAPSOURCE_GUIDE_ORIGIN:
+                source_name = _("Guide origin");
+                break;
+            case SNAPSOURCE_CONVEX_HULL_CORNER:
+                source_name = _("Convex hull corner");
+                break;
+            case SNAPSOURCE_ELLIPSE_QUADRANT_POINT:
+                source_name = _("Quadrant point");
+                break;
+            case SNAPSOURCE_CENTER:
+                source_name = _("Center");
+                break;
+            case SNAPSOURCE_CORNER:
+                source_name = _("Corner");
+                break;
+            case SNAPSOURCE_TEXT_BASELINE:
+                source_name = _("Text baseline");
+                break;
+            default:
+                g_warning("Snap source has not yet been defined!");
+                break;
+        }
+        //std::cout << "Snapped " << source_name << " to " << target_name << std::endl;
+
         remove_snapsource(); // Don't set both the source and target indicators, as these will overlap
-        _snaptarget = _desktop->add_temporary_canvasitem(canvasitem, 1000); // TODO add preference for snap indicator timeout
+
+        // Display the snap indicator (i.e. the cross)
+        SPCanvasItem * canvasitem = NULL;
+        if (p.getTarget() == SNAPTARGET_NODE_SMOOTH || p.getTarget() == SNAPTARGET_NODE_CUSP) {
+            canvasitem = sp_canvas_item_new(sp_desktop_tempgroup (_desktop),
+                                            SP_TYPE_CTRL,
+                                            "anchor", GTK_ANCHOR_CENTER,
+                                            "size", 10.0,
+                                            "stroked", TRUE,
+                                            "stroke_color", 0xf000f0ff,
+                                            "mode", SP_KNOT_MODE_XOR,
+                                            "shape", SP_KNOT_SHAPE_DIAMOND,
+                                            NULL );
+        } else {
+            canvasitem = sp_canvas_item_new(sp_desktop_tempgroup (_desktop),
+                                            SP_TYPE_CTRL,
+                                            "anchor", GTK_ANCHOR_CENTER,
+                                            "size", 10.0,
+                                            "stroked", TRUE,
+                                            "stroke_color", 0xf000f0ff,
+                                            "mode", SP_KNOT_MODE_XOR,
+                                            "shape", SP_KNOT_SHAPE_CROSS,
+                                            NULL );
+        }
+
+        const int timeout_val = 1200; // TODO add preference for snap indicator timeout?
+
+        SP_CTRL(canvasitem)->moveto(p.getPoint());
+        _snaptarget = _desktop->add_temporary_canvasitem(canvasitem, timeout_val);
+
+        gchar *tooltip_str = g_strconcat(source_name, _(" to "), target_name, NULL);
+        Geom::Point tooltip_pos = p.getPoint() + _desktop->w2d(Geom::Point(15, -15));
+
+        SPCanvasItem *canvas_tooltip = sp_canvastext_new(sp_desktop_tempgroup(_desktop), _desktop, tooltip_pos, tooltip_str);
+        g_free(tooltip_str);
+
+        sp_canvastext_set_anchor((SPCanvasText* )canvas_tooltip, -1, 1);
+        _snaptarget_tooltip = _desktop->add_temporary_canvasitem(canvas_tooltip, timeout_val);
     }
 }
 
@@ -80,30 +255,36 @@ SnapIndicator::remove_snaptarget()
         _desktop->remove_temporary_canvasitem(_snaptarget);
         _snaptarget = NULL;
     }
+
+    if (_snaptarget_tooltip) {
+        _desktop->remove_temporary_canvasitem(_snaptarget_tooltip);
+        _snaptarget_tooltip = NULL;
+    }
+
 }
 
 void
-SnapIndicator::set_new_snapsource(Geom::Point const p)
+SnapIndicator::set_new_snapsource(Inkscape::SnapCandidatePoint const &p)
 {
-       remove_snapsource();
-    
+    remove_snapsource();
+
     g_assert(_desktop != NULL);
-    
+
     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
     bool value = prefs->getBool("/options/snapindicator/value", true);
-       
+
     if (value) {
         SPCanvasItem * canvasitem = sp_canvas_item_new( sp_desktop_tempgroup (_desktop),
                                                         SP_TYPE_CTRL,
                                                         "anchor", GTK_ANCHOR_CENTER,
-                                                        "size", 10.0,
+                                                        "size", 6.0,
                                                         "stroked", TRUE,
                                                         "stroke_color", 0xf000f0ff,
                                                         "mode", SP_KNOT_MODE_XOR,
-                                                        "shape", SP_KNOT_SHAPE_DIAMOND,
-                                                        NULL );        
-        
-        SP_CTRL(canvasitem)->moveto(p);
+                                                        "shape", SP_KNOT_SHAPE_CIRCLE,
+                                                        NULL );
+
+        SP_CTRL(canvasitem)->moveto(p.getPoint());
         _snapsource = _desktop->add_temporary_canvasitem(canvasitem, 1000);
     }
 }
@@ -117,11 +298,10 @@ SnapIndicator::remove_snapsource()
     }
 }
 
-
-
 } //namespace Display
 } /* namespace Inkscape */
 
+
 /*
   Local Variables:
   mode:c++
@@ -131,4 +311,4 @@ SnapIndicator::remove_snapsource()
   fill-column:99
   End:
 */
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 :