/// <summary>
/// Paste command processing
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
private void OnPaste(object sender, EventArgs e)
{
Diagram diagram = this.CurrentDocView.CurrentDiagram;
if (diagram == null && this.SingleSelection != null)
{
return;
}
System.Windows.Forms.IDataObject data =
System.Windows.Forms.Clipboard.GetDataObject();
DesignSurfaceElementOperations op = diagram.ElementOperations;
if (op.CanMerge(((PresentationElement)this.SingleSelection).ModelElement, data))
{
// Find a suitable place to position the new shape.
PointD place = new PointD(0, 0);
foreach (object item in this.CurrentSelection)
{
ShapeElement shape = item as ShapeElement;
if (shape != null)
{
place = shape.AbsoluteBoundingBox.Center;
break;
}
}
using (Transaction t = diagram.Store.TransactionManager.BeginTransaction("paste"))
{
// Do the business.
op.Merge((PresentationElement)this.SingleSelection, data, PointD.ToPointF(place));
t.Commit();
System.Windows.Forms.Clipboard.Clear();
}
}
}
/// <summary>
/// Called when the user presses CTRL+V or chooses Paste on the diagram.
/// This method assumes we only want to paste things onto the diagram
/// - not onto anything contained in the diagram.
/// The base method pastes in a free space on the diagram.
/// But if the menu was used to invoke paste, we want to paste in the cursor position.
/// </summary>
protected override void ProcessOnMenuPasteCommand()
{
// If true, this method assumes we're only pasting on the diagram.
// Anything selected will be deselected, and paste will be onto diagram.
const bool pasteOnlyOnDiagram = true;
CircuitsDocView docView = this.CurrentModelingDocView as CircuitsDocView;
// Retrieve data from clipboard:
System.Windows.Forms.IDataObject data = System.Windows.Forms.Clipboard.GetDataObject();
Diagram diagram = docView.CurrentDiagram;
if (diagram == null)
{
return;
}
if (!docView.IsContextMenuShowing)
{
// User hit CTRL+V - just use base method.
// Deselect anything that's selected, otherwise
// pasted item will be incompatible:
if (pasteOnlyOnDiagram && !this.IsDiagramSelected())
{
docView.SelectObjects(1, new object[] { diagram }, 0);
}
// Paste into a convenient spare space on diagram:
base.ProcessOnMenuPasteCommand();
}
else
{
// User right-clicked - paste at mouse position.
// Utility class:
DesignSurfaceElementOperations op = diagram.ElementOperations;
ShapeElement pasteTarget = pasteOnlyOnDiagram ? diagram : this.CurrentSelection.OfType <ShapeElement>().First();
// Check whether what's in the paste buffer is acceptable on the target.
if (op.CanMerge(pasteTarget, data))
{
// Although op.Merge would be a no-op if CanMerge failed, we check CanMerge first
// so that we don't create an empty transaction (after which Undo would be no-op).
using (Transaction t = diagram.Store.TransactionManager.BeginTransaction("paste"))
{
PointD place = docView.ContextMenuMousePosition;
op.Merge(pasteTarget, data, PointD.ToPointF(place));
t.Commit();
}
}
}
}
private void ProcessDragDropItem(DiagramDragEventArgs e)
{
// Utility class:
DesignSurfaceElementOperations op = this.ElementOperations;
ShapeElement pasteTarget = this;
// Check whether what's in the paste buffer is acceptable on the target.
if (op.CanMerge(pasteTarget.ModelElement, e.Data))
{
// Although op.Merge would be a no-op if CanMerge failed, we check CanMerge first
// so that we don't create an empty transaction (after which Undo would be no-op).
using (Transaction t = this.Store.TransactionManager.BeginTransaction("paste"))
{
PointD place = e.MousePosition;
op.Merge(pasteTarget, e.Data, PointD.ToPointF(place));
t.Commit();
}
}
}
///// <summary>
///// Add a command to Paste the content of model elements from the clipboard.
///// </summary>
///// <param name="commands">List of command to add the paste command to.</param>
//public void AddPasteCommand(IList<MenuCommand> commands)
//{
// commands.Add(new DynamicStatusMenuCommand(new EventHandler(OnStatusPaste),
// new EventHandler(OnMenuPaste),
// StandardCommands.Paste));
//}
/// <summary>
/// Status for the Paste Command
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
private void OnStatusPaste(object sender, EventArgs e)
{
bool flag = false;
MenuCommand command = sender as MenuCommand;
Diagram diagram = null;
if (CurrentDocView != null)
{
diagram = this.CurrentDocView.CurrentDiagram;
}
if (diagram != null && this.SingleSelection != null)
{
System.Windows.Forms.IDataObject data = System.Windows.Forms.Clipboard.GetDataObject();
if (data != null)
{
DesignSurfaceElementOperations op = diagram.ElementOperations;
flag = op.CanMerge(((PresentationElement)this.SingleSelection).ModelElement, data);
}
}
command.Visible = command.Enabled = flag;
}
