C#: How to get the element the mouse pointer is directly over

Question

Hi everyone,

I have a canvas where I drag and drop items. I want to put some restrictions on the drop event. For example, if item 1 have been dropped on the canvas, I want a situation where item 2 can only be drop on the canvas if the mouse pointer is directly on item 1.

I have used the Mouse.DirectlyOver but it returns null. So, How can I get element directly the mouse pointer is directly over on drop event?

Note: I am programming with C#

Thanks!

Answer 1

I am using WPF

Answer 2

Thanks guys. This was helpful

Answer 3

Do you have a "dragenter" event in you control ?
What do you use Winforms or WPF ?

http://csharphelper.com/blog/2015/02/drag-and-drop-images-in-c/

In the "dragenter"-event
you can set the behaviour of the item being dragged.
quote :
// Allow a copy of an image.
private void picDropTarget_DragEnter(object sender,
DragEventArgs e)
{
// See if this is a copy and the data includes an image.
if (e.Data.GetDataPresent(DataFormats.Bitmap) &&
(e.AllowedEffect & DragDropEffects.Copy) != 0)
{
// Allow this.
e.Effect = DragDropEffects.Copy;
}
else
{
// Don't allow any other drop.
e.Effect = DragDropEffects.None;
}
}

Answer 4

wpf also has a dragenter event

https://wpf.2000things.com/tag/dragenter/

Does this help you ?

Answer 5

Another one. This one explains the mousedirectlyover.

https://wpf.2000things.com/2012/10/12/667-ismouseover-vs-ismousedirectlyover/

Answer 6

I do appreciatie of you mark a answer as best answer