Feature request 1781331: Use shift key to manipulate ducks. It is now possible to...

git-svn-id: http://svn.voria.com/code@560 1f10aa63-cdf2-0310-b900-c93c546f37ac

diff --git a/synfig-studio/trunk/src/gtkmm/workarea.cpp b/synfig-studio/trunk/src/gtkmm/workarea.cpp
index bf9cebe..f638b01 100644 (file)
--- a/synfig-studio/trunk/src/gtkmm/workarea.cpp
+++ b/synfig-studio/trunk/src/gtkmm/workarea.cpp
@@ -51,6 +51,7 @@
 #include <synfig/target_scanline.h>
 #include <synfig/target_tile.h>
 #include <synfig/surface.h>
+#include <synfig/valuenode_composite.h>
 #include <synfigapp/canvasinterface.h>
 #include "event_mouse.h"
 #include "event_layerclick.h"
@@ -1320,6 +1321,37 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
                        {
                                //get_selected_duck()->signal_user_click(0)();
                                //if(clicked_duck)clicked_duck->signal_user_click(0)();
+
+                               // if the user is holding shift while clicking on a tangent duck, consider splitting the tangent
+                               if (event->motion.state&GDK_SHIFT_MASK && duck->get_type() == Duck::TYPE_TANGENT)
+                               {
+                                       synfigapp::ValueDesc value_desc = duck->get_value_desc();
+
+                                       // we have the tangent, but need the vertex - that's the parent
+                                       if (value_desc.parent_is_value_node()) {
+                                               ValueNode_Composite::Handle parent_value_node = value_desc.get_parent_value_node();
+
+                                               // if the tangent isn't split, then split it
+                                               if (!((*(parent_value_node->get_link("split")))(get_time()).get(bool())))
+                                               {
+                                                       get_canvas_view()->canvas_interface()->
+                                                               change_value(synfigapp::ValueDesc(parent_value_node,
+                                                                                                                                 parent_value_node->get_link_index_from_name("split")),
+                                                                                        true);
+                                                       // rebuild the ducks from scratch, so the tangents ducks aren't connected
+                                                       get_canvas_view()->rebuild_ducks();
+
+                                                       // reprocess the mouse click
+                                                       return on_drawing_area_event(event);
+                                               }
+                                       } else {
+                                               // I don't know how to access the vertex from the tangent duck when originally drawing the bline in the bline tool
+
+                                               // synfig::ValueNode::Handle vn = value_desc.get_value_node();
+                                               synfig::info("parent isn't value node?  shift-drag-tangent doesn't work in bline tool yet...");
+                                       }
+                               }
+
                                dragging=DRAG_DUCK;
                                drag_point=mouse_pos;
                                //drawing_area->queue_draw();