Added drag n drop behaviour to Database Explorer. Selecting a database node and dragging it to a drop target results in the connection string for that database connection being copied to the target.

Bugs exist, most importantly in some cases a retrieval of database metadata results in a class cast exception. It is however possible to create a logical database connection, create and test its connection string, without retrieving metadata.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@2424 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Misc/SharpServerTools/ServerBrowserTool/ServerBrowserTool.csproj

@@ -40,6 +40,7 @@
     <Reference Include="System.Drawing" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Src\Forms\ISupportsDragDrop.cs" />
     <Compile Include="Src\Forms\ServerToolTreeView.cs" />
     <Compile Include="Src\Forms\IInitializable.cs" />
     <Compile Include="Src\Forms\NodeAwareContextMenuStrip.cs" />

src/AddIns/Misc/SharpServerTools/ServerBrowserTool/Src/Forms/ISupportsDragDrop.cs

@@ -0,0 +1,23 @@
+/*
+ * Created by SharpDevelop.
+ * User: dickon
+ * Date: 04/03/2007
+ * Time: 09:14
+ * 
+ * To change this template use Tools | Options | Coding | Edit Standard Headers.
+ */
+
+using System;
+using System.Windows.Forms;
+
+namespace SharpServerTools.Forms
+{
+	/// <summary>
+	/// This interface is implemented by any plugin to ServerExplorer that supports drag and drop
+	/// of some of its data
+	/// </summary>
+	public interface ISupportsDragDrop
+	{
+		void HandleMouseDownEvent(object sender, MouseEventArgs e);
+	}
+}

src/AddIns/Misc/SharpServerTools/ServerBrowserTool/Src/Forms/ServerToolTreeView.cs

@@ -34,14 +34,25 @@ namespace SharpServerTools.Forms
 				// create an instance of the relevant ServerTool TreeNode
 				string id = codon.Id;
 				TreeNode treeNode = (TreeNode)node.BuildChildItem(id, null, null);
-				IRequiresRebuildSource s = treeNode as IRequiresRebuildSource;
-				
+
 				// a ServerTool plugin can register to be refreshed by the ServerToolTreeView
 				// control by implementing the IRequiresRebuildSource interface
 				
+				IRequiresRebuildSource s = treeNode as IRequiresRebuildSource;
+				
 				if (s != null) {
 					s.RebuildRequiredEvent += new RebuildRequiredEventHandler(RebuildRequiredNotify);
 				}
+				
+				// a ServerTool plugin can also register to handle drag-n-drop if it implements
+				// the required interface
+				
+				ISupportsDragDrop d = treeNode as ISupportsDragDrop;
+				
+				if (d != null) {
+					this.MouseDown += new MouseEventHandler(d.HandleMouseDownEvent);
+				}
+				
 				this.Nodes.Add(treeNode);
 			}
 			
@@ -91,7 +102,7 @@ namespace SharpServerTools.Forms
 			}
 		}
 		
-		
 	}
 	public delegate void RebuildChildrenDelegate(IEnumerable children);
+	
 }

src/AddIns/Misc/SharpServerTools/SharpDbTools/Src/Forms/DatabaseExplorerTreeNode.cs

@@ -22,7 +22,7 @@ namespace SharpDbTools.Forms
 	/// Description of DatabaseExplorerNode.
 	/// Hold minimal state - access state through the DbModelInfoService
 	/// </summary>
-	public class DatabaseExplorerTreeNode: TreeNode, IRebuildable, IRequiresRebuildSource
+	public class DatabaseExplorerTreeNode: TreeNode, IRebuildable, IRequiresRebuildSource, ISupportsDragDrop
 	{	
 		public DatabaseExplorerTreeNode(): base("Database Explorer")
 		{
@@ -143,5 +143,31 @@ namespace SharpDbTools.Forms
 				}
 			}
 		}
+		
+		/// <summary>
+		/// If a DbModelInfoTreeNode is selected then the desired drag and drop behaviour
+		/// is to pass the ConnectionString to drop target.
+		/// </summary>
+		/// <param name="sender"></param>
+		/// <param name="e"></param>
+		public void HandleMouseDownEvent(object sender, MouseEventArgs e)
+		{
+			LoggingService.Debug(this.GetType().Name + " handling MouseDownEvent");
+			TreeView parent = this.TreeView;
+			TreeNode currentlySelected = parent.SelectedNode;
+			
+			// If the user has selected a TreeNode for a specific connection, and has the right
+			// mouse button down, then initiate a drag drop operation
+			DbModelInfoTreeNode infoNode = currentlySelected as DbModelInfoTreeNode;
+			if (infoNode != null) {
+				string logicalConnectionName = infoNode.LogicalConnectionName;
+				DbModelInfo info = DbModelInfoService.GetDbModelInfo(logicalConnectionName);
+				string connectionString = info.ConnectionString;
+				LoggingService.Debug("drag drop operation initiated for ConnectionString: " + connectionString);
+				if (connectionString != null) {
+					parent.DoDragDrop(connectionString, DragDropEffects.Copy);	
+				}
+			}
+		}
 	}
 }