Hourglass problem in a WinForm application

Question

In my program with a UI in WinForm. I set the cursor to a hourglass just before to launch a method in ThreadPool.

My code in UI thread to set the cursor looks like this :

Application.UseWaitCursor = true;

When the method is finished, i go back to the UI Thread to set the cursor to the normal case.

Application.UseWaitCursor = false;

My problem is the cursor stay to the Hourglass till I don't move the mouse. It's a little bit disturbing if the user wait on the end of the action without moving the mouse.

Anyone can help me ?

Jérôme

Answer 1

Actually, there is one more way to do it, which I found somewhere after hours of researching this problem.

Unfortunately, it is a hack.

Below is a method that I wrote that handles the problem.

/// <summary>
    /// Call to toggle between the current cursor and the wait cursor
    /// </summary>
    /// <param name="control">The calling control.</param>
    /// <param name="toggleWaitCursorOn">True for wait cursor, false for default.</param>
    public static void UseWaitCursor(this Control control, bool toggleWaitCursorOn)
    {
        ...

        control.UseWaitCursor = toggleWaitCursorOn;

        // Because of a weird quirk in .NET, just setting UseWaitCursor to false does not work
        // until the cursor's position changes. The following line of code fakes that and 
        // effectively forces the cursor to switch back  from the wait cursor to default.
        if (!toggleWaitCursorOn)
            Cursor.Position = Cursor.Position;
    }