CODEWITHSUNDEEP
c#wpfdrag-and-dropvs-extensibilityvspackage
Dave Clemmer
Dave Clemmer

Reputation: 3781

How do you enable drag and drop within a VSPackage ToolWindow?

I have a WPF user control that provides drag and drop functionality within that control. When the user control is hosted within a WPF app, all works fine. However when it is hosted within a VSPackage ToolWindow, drop is disabled altogether.

In this particular case I'm trying to drag a selected item in a draggable list box (left side of diagram below) onto a canvas on the right side.

enter image description here

The drag can be initiated with DoDragDrop, such as:

    protected override void OnMouseMove(MouseEventArgs e)
    {
        base.OnMouseMove(e);
        if (e.LeftButton != MouseButtonState.Pressed)
            dragStartPoint = null;

        if (dragStartPoint.HasValue)
        {
            DragDrop.DoDragDrop(this, Content, DragDropEffects.Copy);
            e.Handled = true;
        }
    }

But then drop is not allowed anywhere in the tool window.

What kind of conditions would prevent drag and drop within a tool window, and what settings changes are necessary to enable it?

Upvotes: 1

Views: 1197

Answers (1)

Dave Clemmer
Dave Clemmer

Reputation: 3781

The answer was found in Alin Constantin's Blog, and pointed out by user Notre on MSDN. I needed to handle ALL the drag and drop related events so that the VS shell doesn't intercept them. In my case, I needed to handle the DragOver event in the Canvas control:

    protected override void OnDragOver(DragEventArgs e)
    {
        base.OnDragOver(e);
        e.Handled = true;
    }

Upvotes: 1

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