SD2-693 - ToolstripContainer designer loading problem. Applied Christian Hornung's patch that adds a Deselecting event handler for the IBaseViewContent interface, which is called before the view has been deselected, allowing the forms designer to read the correct ToolStripPanelVisible properties before the designed form is hidden.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/2.0@1172 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerViewContent.cs

@@ -347,17 +347,17 @@ namespace ICSharpCode.FormsDesigner
 		{
 			disposing = true;
 			if (IsFormsDesignerVisible) {
-				Deselected();
+				Deselecting();
 			}
 			base.Dispose();
 		}
 		
-		public override void Deselected()
+		public override void Deselecting()
 		{
 			// can happen if form designer is disposed and then deselected
 			if (!IsFormsDesignerVisible)
 				return;
-			LoggingService.Info("Deselected form designer, unloading..." + viewContent.TitleName);
+			LoggingService.Info("Deselecting form designer, unloading..." + viewContent.TitleName);
 			PropertyPad.PropertyValueChanged -= PropertyValueChanged;
 			propertyContainer.Clear();
 			IsFormsDesignerVisible = false;

src/Main/Base/Project/Src/Gui/AbstractBaseViewContent.cs

@@ -55,6 +55,10 @@ namespace ICSharpCode.SharpDevelop.Gui
 		public virtual void Deselected()
 		{
 		}
+
+		public virtual void Deselecting()
+		{
+		}
 		
 		public virtual void RedrawContent()
 		{

src/Main/Base/Project/Src/Gui/IBaseViewContent.cs

@@ -50,6 +50,12 @@ namespace ICSharpCode.SharpDevelop.Gui
 		/// tab. NOT when the windows is selected.
 		/// </summary>
 		void Selected();
+
+		/// <summary>
+		/// Is called just before the view content is deselected inside the window
+		/// tab before the other window is selected. NOT when the windows is deselected.
+		/// </summary>
+		void Deselecting();
 		
 		/// <summary>
 		/// Is called when the view content is deselected inside the window

src/Main/Base/Project/Src/Gui/Workbench/Layouts/SdiWorkspaceWindow.cs

@@ -136,7 +136,9 @@ namespace ICSharpCode.SharpDevelop.Gui
 			viewTabControl = new TabControl();
 			viewTabControl.Alignment = TabAlignment.Bottom;
 			viewTabControl.Dock = DockStyle.Fill;
-			viewTabControl.SelectedIndexChanged += new EventHandler(viewTabControlIndexChanged);
+			viewTabControl.Selected += viewTabControlSelected;
+			viewTabControl.Deselecting += viewTabControlDeselecting;
+			viewTabControl.Deselected += viewTabControlDeselected;
 		}
 		
 		internal void InitControls()
@@ -200,11 +202,6 @@ namespace ICSharpCode.SharpDevelop.Gui
 			WorkbenchSingleton.SafeThreadAsyncCall(new MethodInvoker(this.RefreshSecondaryViewContents));
 		}
 		
-		void LeaveTabPage(object sender, EventArgs e)
-		{
-			OnWindowDeselected(EventArgs.Empty);
-		}
-		
 		public IViewContent ViewContent {
 			get {
 				return content;
@@ -260,6 +257,9 @@ namespace ICSharpCode.SharpDevelop.Gui
 			
 			if (viewTabControl != null) {
 				foreach (TabPage page in viewTabControl.TabPages) {
+					if (viewTabControl.SelectedTab == page && page.Tag is IBaseViewContent) {
+						((IBaseViewContent)page.Tag).Deselecting();
+					}
 					page.Controls.Clear();
 					if (viewTabControl.SelectedTab == page && page.Tag is IBaseViewContent) {
 						((IBaseViewContent)page.Tag).Deselected();
@@ -319,28 +319,40 @@ namespace ICSharpCode.SharpDevelop.Gui
 				return content.SecondaryViewContents[index - 1];
 		}
 		
-		int oldIndex = 0;
-		void viewTabControlIndexChanged(object sender, EventArgs e)
+		void viewTabControlSelected(object sender, TabControlEventArgs e)
 		{
-			if (oldIndex >= 0) {
-				IBaseViewContent secondaryViewContent = GetSubViewContent(oldIndex);
+			if (e.Action == TabControlAction.Selected && e.TabPageIndex >= 0) {
+				IBaseViewContent secondaryViewContent = GetSubViewContent(e.TabPageIndex);
 				if (secondaryViewContent != null) {
 					secondaryViewContent.Deselected();
-				}
-			}
-			
-			if (viewTabControl.SelectedIndex >= 0) {
-				IBaseViewContent secondaryViewContent = GetSubViewContent(viewTabControl.SelectedIndex);
-				if (secondaryViewContent != null) {
 					secondaryViewContent.SwitchedTo();
 					secondaryViewContent.Selected();
 				}
 			}
-			oldIndex = viewTabControl.SelectedIndex;
 			WorkbenchSingleton.Workbench.WorkbenchLayout.OnActiveWorkbenchWindowChanged(EventArgs.Empty);
 			ActiveViewContent.Control.Focus();
 		}
 		
+		void viewTabControlDeselecting(object sender, TabControlCancelEventArgs e)
+		{
+			if (e.Action == TabControlAction.Deselecting && e.TabPageIndex >= 0) {
+				IBaseViewContent secondaryViewContent = GetSubViewContent(e.TabPageIndex);
+				if (secondaryViewContent != null) {
+					secondaryViewContent.Deselecting();
+				}
+			}
+		}
+
+		void viewTabControlDeselected(object sender, TabControlEventArgs e)
+		{
+			if (e.Action == TabControlAction.Deselected && e.TabPageIndex >= 0) {
+				IBaseViewContent secondaryViewContent = GetSubViewContent(e.TabPageIndex);
+				if (secondaryViewContent != null) {
+					secondaryViewContent.Deselected();
+				}
+			}
+		}
+
 		public virtual void RedrawContent()
 		{
 			if (viewTabControl != null) {