Finally introducing the pre-snap indicator

(bzr r9034)

1 files changed, 32 insertions, 25 deletions

diff --git a/src/arc-context.cpp b/src/arc-context.cpp
index 9cb6e8222..ccaaedd14 100644
--- a/src/arc-context.cpp
+++ b/src/arc-context.cpp
@@ -116,15 +116,15 @@ static void sp_arc_context_init(SPArcContext *arc_context)
 static void sp_arc_context_finish(SPEventContext *ec)
 {
     SPArcContext *ac = SP_ARC_CONTEXT(ec);
-	SPDesktop *desktop = ec->desktop;
+    SPDesktop *desktop = ec->desktop;
 
-	sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), GDK_CURRENT_TIME);
-	sp_arc_finish(ac);
+    sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), GDK_CURRENT_TIME);
+    sp_arc_finish(ac);
     ac->sel_changed_connection.disconnect();
 
     if (((SPEventContextClass *) parent_class)->finish) {
-		((SPEventContextClass *) parent_class)->finish(ec);
-	}
+        ((SPEventContextClass *) parent_class)->finish(ec);
+    }
 }
 
 static void sp_arc_context_dispose(GObject *object)
@@ -274,6 +274,13 @@ static gint sp_arc_context_root_handler(SPEventContext *event_context, GdkEvent
                 gobble_motion_events(GDK_BUTTON1_MASK);
 
                 ret = TRUE;
+            } else if (sp_event_context_knot_mouseover(ac)){
+                SnapManager &m = desktop->namedview->snap_manager;
+                m.setup(desktop);
+
+                Geom::Point const motion_w(event->motion.x, event->motion.y);
+                Geom::Point motion_dt(desktop->w2d(motion_w));
+                m.preSnap(Inkscape::SnapCandidatePoint(motion_dt, Inkscape::SNAPSOURCE_NODE_HANDLE));
             }
             break;
         case GDK_BUTTON_RELEASE:
@@ -283,7 +290,7 @@ static gint sp_arc_context_root_handler(SPEventContext *event_context, GdkEvent
                 sp_event_context_discard_delayed_snap_event(event_context);
                 if (!event_context->within_tolerance) {
                     // we've been dragging, finish the arc
-               		sp_arc_finish(ac);
+                       sp_arc_finish(ac);
                 } else if (event_context->item_to_select) {
                     // no dragging, select clicked item if any
                     if (event->button.state & GDK_SHIFT_MASK) {
@@ -335,14 +342,14 @@ static gint sp_arc_context_root_handler(SPEventContext *event_context, GdkEvent
                     }
                     break;
                 case GDK_Escape:
-                	if (dragging) {
-                		dragging = false;
-                		sp_event_context_discard_delayed_snap_event(event_context);
-                		// if drawing, cancel, otherwise pass it up for deselecting
-						sp_arc_cancel(ac);
-						ret = TRUE;
-					}
-                	break;
+                    if (dragging) {
+                        dragging = false;
+                        sp_event_context_discard_delayed_snap_event(event_context);
+                        // if drawing, cancel, otherwise pass it up for deselecting
+                        sp_arc_cancel(ac);
+                        ret = TRUE;
+                    }
+                    break;
                 case GDK_space:
                     if (dragging) {
                         sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
@@ -480,13 +487,13 @@ static void sp_arc_finish(SPArcContext *ac)
 
     if (ac->item != NULL) {
 
-    	SPGenericEllipse *ge = SP_GENERICELLIPSE(SP_ARC(ac->item));
-		if (ge->rx.computed == 0 || ge->ry.computed == 0) {
-			sp_arc_cancel(ac); // Don't allow the creating of zero sized arc, for example when the start and and point snap to the snap grid point
-			return;
-		}
+        SPGenericEllipse *ge = SP_GENERICELLIPSE(SP_ARC(ac->item));
+        if (ge->rx.computed == 0 || ge->ry.computed == 0) {
+            sp_arc_cancel(ac); // Don't allow the creating of zero sized arc, for example when the start and and point snap to the snap grid point
+            return;
+        }
 
-    	SPDesktop *desktop = SP_EVENT_CONTEXT(ac)->desktop;
+        SPDesktop *desktop = SP_EVENT_CONTEXT(ac)->desktop;
 
         SP_OBJECT(ac->item)->updateRepr();
 
@@ -502,14 +509,14 @@ static void sp_arc_finish(SPArcContext *ac)
 
 static void sp_arc_cancel(SPArcContext *ac)
 {
-	SPDesktop *desktop = SP_EVENT_CONTEXT(ac)->desktop;
+    SPDesktop *desktop = SP_EVENT_CONTEXT(ac)->desktop;
 
-	sp_desktop_selection(desktop)->clear();
-	sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), 0);
+    sp_desktop_selection(desktop)->clear();
+    sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), 0);
 
     if (ac->item != NULL) {
-    	SP_OBJECT(ac->item)->deleteObject();
-    	ac->item = NULL;
+        SP_OBJECT(ac->item)->deleteObject();
+        ac->item = NULL;
     }
 
     ac->within_tolerance = false;