Changeset 70:2ee22e690853 in glemon-0.x

Timestamp:

08/26/05 14:37:34 (18 years ago)

Author:

Akos Ladanyi

Branch:

gui

Phase:

public

Convert:

svn:c9d7d8f5-90d6-0310-b91f-818b3a526b0e/lemon/trunk/gui@2165

Message:

Display the node's coordinates while moving it.

File:

• graph_displayer_canvas-event.cc (modified) (4 diffs)

graph_displayer_canvas-event.cc

@@ -87 +87 @@
 bool GraphDisplayerCanvas::moveEventHandler(GdkEvent* e)
 {
+  static Gnome::Canvas::Text *coord_text = 0;
   switch(e->type)
   {
@@ -113 +114 @@
       break;
     case GDK_BUTTON_RELEASE:
+      if (coord_text)
+      {
+        delete coord_text;
+        coord_text = 0;
+      }
       isbutton=0;
       active_item=NULL;
@@ -122 +128 @@
       {
         mapstorage.modified = true;
-        mapstorage.coords.set(active_node, xy<double>(clicked_x, clicked_y));
+
         //new coordinates will be the old values,
         //because the item will be moved to the
@@ -139 +145 @@
         nodetextmap[active_node]->move(dx, dy);
 
+        // the new coordinates of the centre of the node 
+        double coord_x = new_x - (clicked_x - mapstorage.coords[active_node].x);
+        double coord_y = new_y - (clicked_y - mapstorage.coords[active_node].y);
+
         clicked_x=new_x;
         clicked_y=new_y;
 
-
+        // write back the new coordinates to the coords map
+        mapstorage.coords.set(active_node, xy<double>(coord_x, coord_y));
+
+        // reposition the coordinates text
+        std::ostringstream ostr;
+        ostr << "(" <<
+          mapstorage.coords[active_node].x << ", " <<
+          mapstorage.coords[active_node].y << ")";
+        if (coord_text)
+        {
+          coord_text->property_text().set_value(ostr.str());
+          coord_text->property_x().set_value(mapstorage.coords[active_node].x +
+              node_property_defaults[N_RADIUS] + 40);
+          coord_text->property_y().set_value(mapstorage.coords[active_node].y +
+              node_property_defaults[N_RADIUS] - 40);
+        }
+        else
+        {
+          coord_text = new Gnome::Canvas::Text(
+              displayed_graph,
+              mapstorage.coords[active_node].x +
+              node_property_defaults[N_RADIUS] + 40,
+              mapstorage.coords[active_node].y +
+              node_property_defaults[N_RADIUS] - 40,
+              ostr.str());
+          coord_text->property_fill_color().set_value("black");
+        }
+
+        //all the edges connected to the moved point has to be redrawn
         for(OutEdgeIt ei(mapstorage.graph,active_node);ei!=INVALID;++ei)
         {