/// <summary>
/// Perofrm mouse hit testing against a screen point.
/// </summary>
/// <param name="screenPoint">Screen point.</param>
/// <returns>Area that is active.</returns>
public int ScreenMouseMove(Point screenPoint)
{
// Convert from screen to client coordinates
Point pt = new Point(screenPoint.X - _showRect.X, screenPoint.Y - _showRect.Y);
// Remember the current active value
int activeBefore = _dragData.ActiveFlags;
// Reset active back to nothing
_dragData.ClearActive();
// Find new active area
if (_dragData.ShowLeft && _dragData.RectLeft.Contains(pt)) _dragData.ActiveLeft = true;
if (_dragData.ShowRight && _dragData.RectRight.Contains(pt)) _dragData.ActiveRight = true;
if (_dragData.ShowTop && _dragData.RectTop.Contains(pt)) _dragData.ActiveTop = true;
if (_dragData.ShowBottom && _dragData.RectBottom.Contains(pt)) _dragData.ActiveBottom = true;
// Only consider the middle if the others do not match
if ((_dragData.ActiveFlags == 0) && _dragData.ShowMiddle && _dragData.RectMiddle.Contains(pt))
_dragData.ActiveMiddle = true;
// Do we need to update the display?
if (_dragData.ActiveFlags != activeBefore)
UpdateLayeredWindow(_showRect);
return _dragData.ActiveFlags;
}
