How can i get centre position on diagram

GoJS
1

I want get centre position of diagram already zoomed and moved, to paste clipboard object to it.
by the way i have 2 or more diagram copy paste nodes each other.

2

I’m not sure I understand what you want to do, but I think you want to call Diagram.centerRect with the desired document bounds Rect area, and CommandHandler.pasteSelection with a point near the myDiagram.documentBounds.center.

3

I want paste object to other diagram use keyboard Crtl+v , paste position is diagram center.
the target diagram may be already zoom to some Rect area.

4

If you call CommandHandler.pasteSelection with no arguments it will call CommandHandler.pasteFromClipboard and leave the newly copied nodes where they were.

If you call CommandHandler.pasteSelection with a Point argument, the copied nodes will be moved to be centered at the given point.

5

i got a solution.
**
commandHandler.pasteSelection = function(pos) {
go.CommandHandler.prototype.pasteSelection.call(commandHandler, dgm.lastInput.documentPoint);
}
**
always paste at mouse point. it Ok for me. thanks.