If I do a RadTreeView.DoDragDrop in the MouseDown event, the DoubleClick Event never fires. Is there a way to begin Drag and Drop in MouseDown, and still get the DoubleClick event? Basically, if it's a DoubleClick, I don't need the MouseDown event, because there is no need to have started the Drag and Drop.
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Hello, Terry,
The MouseDown event is expected to be fired before the DoubleClick event which needs a second click. Then, if the drag and drop operation is already started, it is normal that the DoubleClick event wouldn't be fired while the drag operation is ongoing. I believe that a similar behavior is observed with the Microsoft TreeView.
The possible solution that I can suggest is to start the drag and drop operation at a later moment, e.g. in the MouseMove event. Thus, you can check whether the left mouse button is pressed and determine whether to start the drag operation:
I hope this information helps. If you need any further assistance please don't hesitate to contact me.
The MouseDown event is expected to be fired before the DoubleClick event which needs a second click. Then, if the drag and drop operation is already started, it is normal that the DoubleClick event wouldn't be fired while the drag operation is ongoing. I believe that a similar behavior is observed with the Microsoft TreeView.
The possible solution that I can suggest is to start the drag and drop operation at a later moment, e.g. in the MouseMove event. Thus, you can check whether the left mouse button is pressed and determine whether to start the drag operation:
private Point mouseDownPosition;
private void RadTreeView1_MouseMove(object sender, MouseEventArgs e)
{
var node = radTreeView1.ElementTree.GetElementAtPoint(mouseDownPosition) as TreeNodeElement;
if (node != null&& e.Button == MouseButtons.Left&& IsRealDrag(mouseDownPosition, e.Location))
{
radTreeView1.DoDragDrop(node.Data.Text, DragDropEffects.Copy);
}
}
private static bool IsRealDrag(Point mousePosition, Point initialMousePosition)
{
return (Math.Abs(mousePosition.X - initialMousePosition.X) >= SystemInformation.DragSize.Width) ||
(Math.Abs(mousePosition.Y - initialMousePosition.Y) >= SystemInformation.DragSize.Height);
}
private void RadTreeView1_MouseDown(object sender, MouseEventArgs e)
{
this.mouseDownPosition = e.Location;
}Regards,
Dess | Tech Support Engineer, Sr.
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Terry
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answered on 08 Feb 2021, 10:57 PM
Thanks! This solution works well for me.