Add workaround to prevent DockablePanes with width 0.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0wpf@3453 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

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

@@ -118,6 +118,19 @@ namespace ICSharpCode.SharpDevelop.Gui
 				pads.Add(content, pad);
 				padsByClass.Add(content.Class, pad);
 				dockingManager.Show(pad, DockableContentState.Docked, AnchorStyle.Right);
+				SetPaneSizeWorkaround(pad.ContainerPane);
+			}
+		}
+		
+		static void SetPaneSizeWorkaround(Pane pane)
+		{
+			ResizingPanel panel = pane.Parent as ResizingPanel;
+			if (panel.Orientation == Orientation.Horizontal) {
+				if (ResizingPanel.GetResizeWidth(pane) == 0)
+					ResizingPanel.SetResizeWidth(pane, 150);
+			} else if (panel.Orientation == Orientation.Vertical) {
+				if (ResizingPanel.GetResizeHeight(pane) == 0)
+					ResizingPanel.SetResizeHeight(pane, 100);
 			}
 		}
 		
@@ -148,7 +161,8 @@ namespace ICSharpCode.SharpDevelop.Gui
 		
 		public bool IsVisible(PadDescriptor padContent)
 		{
-			return pads[padContent].IsVisible;
+			AvalonPadContent pad = pads[padContent];
+			return pad.IsVisible;
 		}
 		
 		public IWorkbenchWindow ShowView(IViewContent content)