Hello,

I've encountered the following problem:

When I drag a new Shape from the ShapeList to the FlowChart, the ActionRecorded Event is fired.

How do I capture this to build a new CompositeCmd?

I tried creating a new CompositeCmd in the ActionRecording Event, but it keeps adding all following actions separatly in the UndoManager.

s.th. like this:

        private void flowChart_ActionRecording(object sender, UndoConfirmEventArgs e)
        {
            //now start the composition depending on the Command
            if(e.Command.Title.Equals("Create"))
            {
                cmd = new CompositeCmd(FlowChart, "Erstellen");
                e.Confirm = true;
            }

        } 

cmd is a private variable of the class in which the FlowChart is defined.

After that, i try to execute the composite command at the end of the BoxCreated event, but this simply adds the CompositeCmd to the History after all other commands (which should be subCmds of this CompositeCmd).

Any ideas?

Hello,

thanks, this works perfectly. But now I have a question:

When I call the Undo() function of the UndoManager, this function is deleted from the CommandHistory. How can I change this, since a redo doesn't make any sense then? I didn't find a solution.

Alex

Actually recording a new command deletes the oldest one from the undo buffer only if the buffer is full. The Undo method only moves the "current command" pointer one position back in the buffer. However, if there is another command recorded after calling Undo(), it will overwrite the one that otherwise would be redone next.

Stoyan

Are you sure there isn't some other code executed after Undo? It might implicitly save its own record in the undo buffer and overwrite the CompositeCmd.