Hi, I'm currently searching a way to make the DrawLinksBehavior cohabitate with the PanBehaviour. (so the user can pan while creating a link without reseting the link being created nor the visual feedback).
I found another post of this issue but it was for android. Is there a fancy way to do it in c# ?

Hi,

Panning while drawing a link sounds like automatic scrolling -

[code]
diagramView.Behavior = Behavior.DrawLinks;
diagramView.AutoScroll = true;[/code]

Or do you mean pressing additional mouse button to enable pan mode while also holding the left one for drawing?

Regards,
Slavcho
Mindfusion

Sorry if it wasnt clear, it's actually the second behaviour i'm trying to implement.

=> Or do you mean pressing additional mouse button to enable pan mode while also holding the left one for drawing?

But actually, the Drawlink interraction is cancelled by the pan.
So I would like to restart a new drawlink after a pan if a previous drawlink was active at the begining of the pan.

It looks like it is possible but I cant find a way to achieve it.

The Behavior classes can track only a single mouse button (pressing a second button cancels the current interaction), so it's not possible to handle two buttons out of the box. You can still implement simultaneous panning by overriding mouse event handlers in a custom DiagramView class -

[code]
class MyDiagramView : DiagramView
{
     protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
     {
           base.OnMouseDown(e);

           if (e.Button == MouseButtons.Right)
           {
                 prevPanPoint = ClientToDoc(e.Location);
                 panning = true;
           }
     }

     protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
     {
           base.OnMouseMove(e);

           if (panning)
           {
                 var currentPoint = ClientToDoc(e.Location);
                 ScrollX += prevPanPoint.X - currentPoint.X;
                 ScrollY += prevPanPoint.Y - currentPoint.Y;
                 RecreateCacheImage();

                 prevPanPoint = ClientToDoc(e.Location);
           }
     }

     protected override void OnMouseUp(System.Windows.Forms.MouseEventArgs e)
     {
           if (e.Button == MouseButtons.Right)
                 panning = false;
           else
                 base.OnMouseUp(e);
     }

     PointF prevPanPoint;
     bool panning;
}[/code]

Regards,
Slavcho

Looks like a good way to implement the required behaviour. Thanks a lot, I'll keep updated if i make it work out.

Tried it, it was slopy and didnt fit the requirements, but I found a way to implement it (bypassing interactions) and users were happy.

Thanks anyway :)