Resolved Using a Custom Cursor with Drag and Drop Flickers

[tim8w]

Hi,
I am trying to use my PictureBox image as a Custom Cursor for Drag and Drop. From the documentation, it suggests that I set the cursor in the GiveFeedback routine. If I do that, then the Image flickers. Is there a different or more preferred method to do this?

private void pbLessThanLg_MouseDown(object sender, MouseEventArgs e)
{
    PictureBox pbSelected = (PictureBox)sender;
    pbSelected.DoDragDrop(pbSelected.Image, DragDropEffects.Copy);
}

private void pbLessThanLg_GiveFeedback(object sender, GiveFeedbackEventArgs e)
{
    PictureBox pbSelected = (PictureBox)sender;
    Cursor.Current = BitmapToCursor((Bitmap)pbSelected.Image, 64, 64);
}

 

[Skydiver]

In general, you should only change the cursor when the feedback event args indicate that you are changing states from copy to move, or from move to no-drop, etc. Otherwise if the current drag-drop state is the same as the last drag-drop state, leave things alone.

Also, is your BitmapToCursor() creating a brand new cursor each time? You should try to cache cursors and only create new ones when needed.

 

[tim8w]

In general, you should only change the cursor when the feedback event args indicate that you are changing states from copy to move, or from move to no-drop, etc. Otherwise if the current drag-drop state is the same as the last drag-drop state, leave things alone.

Also, is your BitmapToCursor() creating a brand new cursor each time? You should try to cache cursors and only create new ones when needed.

Sky,
Thanks. I changed the GiveFeedback to:

private void pbLessThanLg_GiveFeedback(object sender, GiveFeedbackEventArgs e)
{
    if (e.Effect == DragDropEffects.Copy)
    {
        e.UseDefaultCursors = false;
        Cursor.Current = pbLessThanLgCursor;
    }
    else
        e.UseDefaultCursors = false;
}

and it worked perfectly!