Fixed problem that could cause invalid Drag'n'Drop operations to be executed if OnDragDrop executed without a prior OnDragOver for that mouse position (e.g. very fast moving of a folder into its own subfolder)

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/2.1@2476 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

samples/SdaUser/SdaAddIns/SdaBase.addin

@@ -14,12 +14,12 @@
 		<Import assembly=":ICSharpCode.SharpDevelop">
 			<!-- SharpDevelop defines more conditions and doozers, we just -->
 			<!-- import those we need here. -->
-			<ConditionEvaluator name="WindowActive" class="ICSharpCode.Core.WindowActiveConditionEvaluator"/>
-			<ConditionEvaluator name="ActiveWindowState" class="ICSharpCode.Core.ActiveWindowStateConditionEvaluator"/>
-			<ConditionEvaluator name="OpenWindowState" class="ICSharpCode.Core.OpenWindowStateConditionEvaluator"/>
+			<ConditionEvaluator name="WindowActive" class="ICSharpCode.SharpDevelop.WindowActiveConditionEvaluator"/>
+			<ConditionEvaluator name="ActiveWindowState" class="ICSharpCode.SharpDevelop.ActiveWindowStateConditionEvaluator"/>
+			<ConditionEvaluator name="OpenWindowState" class="ICSharpCode.SharpDevelop.OpenWindowStateConditionEvaluator"/>
 			
-			<Doozer name="DialogPanel" class="ICSharpCode.Core.DialogPanelDoozer"/>
-			<Doozer name="DisplayBinding" class="ICSharpCode.Core.DisplayBindingDoozer"/>
+			<Doozer name="DialogPanel" class="ICSharpCode.SharpDevelop.DialogPanelDoozer"/>
+			<Doozer name="DisplayBinding" class="ICSharpCode.SharpDevelop.DisplayBindingDoozer"/>
 		</Import>
 	</Runtime>
 	

src/Main/Base/Project/Src/Gui/Components/ExtTreeView/ExtTreeView.cs

@@ -374,6 +374,16 @@ namespace ICSharpCode.SharpDevelop.Gui
 			ExtTreeNode node             = GetNodeAt(clientcoordinate) as ExtTreeNode;
 			
 			if (node != null) {
+				HandleDragOver(e, node);
+				
+				if (e.Effect != DragDropEffects.None) {
+					SelectedNode = node;
+				}
+			}
+		}
+		
+		void HandleDragOver(DragEventArgs e, ExtTreeNode node)
+		{
 			DragDropEffects effect = DragDropEffects.None;
 			
 			if ((e.KeyState & 8) > 0) { // CTRL key pressed.
@@ -382,11 +392,6 @@ namespace ICSharpCode.SharpDevelop.Gui
 				effect = DragDropEffects.Move;
 			}
 			e.Effect = node.GetDragDropEffect(e.Data, effect);
-				
-				if (e.Effect != DragDropEffects.None) {
-					SelectedNode = node;
-				}
-			}
 		}
 		
 		protected override void OnDragDrop(DragEventArgs e)
@@ -396,10 +401,17 @@ namespace ICSharpCode.SharpDevelop.Gui
 			ExtTreeNode node             = GetNodeAt(clientcoordinate) as ExtTreeNode;
 			
 			if (node != null) {
+				// when dragging very fast from one node to another, it's possible that
+				// OnDragDrop raises without OnDragOver for the node.
+				// So we have to call HandleDragOver to ensure that we don't call DoDragDrop for
+				// invalid operations.
+				HandleDragOver(e, node);
+				if (e.Effect != DragDropEffects.None) {
 					node.DoDragDrop(e.Data, e.Effect);
 					SortParentNodes(node);
 				}
 			}
+		}
 		
 		public int GetImageIndexForImage(string image, bool performCutBitmap)
 		{

src/Main/Base/Project/Src/Gui/Pads/ProjectBrowser/ProjectBrowserPanel.cs

@@ -45,6 +45,7 @@ namespace ICSharpCode.SharpDevelop.Project
 			projectBrowserControl.Dock = DockStyle.Fill;
 			Controls.Add(projectBrowserControl);
 			
+			if (AddInTree.ExistsTreeNode("/SharpDevelop/Pads/ProjectBrowser/ToolBar/Standard")) {
 				toolStrip = ToolbarService.CreateToolStrip(this, "/SharpDevelop/Pads/ProjectBrowser/ToolBar/Standard");
 				toolStrip.ShowItemToolTips  = true;
 				toolStrip.Dock = DockStyle.Top;
@@ -53,6 +54,7 @@ namespace ICSharpCode.SharpDevelop.Project
 				standardItems = new ToolStripItem[toolStrip.Items.Count];
 				toolStrip.Items.CopyTo(standardItems, 0);
 				Controls.Add(toolStrip);
+			}
 			projectBrowserControl.TreeView.BeforeSelect += TreeViewBeforeSelect;
 		}
 		
@@ -63,6 +65,7 @@ namespace ICSharpCode.SharpDevelop.Project
 		
 		void UpdateToolStrip(AbstractProjectBrowserTreeNode node)
 		{
+			if (toolStrip == null) return;
 			toolStrip.Items.Clear();
 			toolStrip.Items.AddRange(standardItems);
 			ToolbarService.UpdateToolbar(toolStrip);