private void WmNCLButtonDown(ref Message msg)
{
Point pt = this.PointToWindow(new Point(msg.LParam.ToInt32()));
NonClientMouseEventArgs args = new NonClientMouseEventArgs(
MouseButtons.Left, 1, pt.X, pt.Y, 0, msg.WParam.ToInt32());
OnNonClientMouseDown(args);
if (!args.Handled)
{
DefWndProc(ref msg);
}
msg.Result = NativeMethods.TRUE;
}
protected override void OnNonClientMouseDown(NonClientMouseEventArgs args)
{
if (args.Button != MouseButtons.Left)
{
return;
}
// custom button
foreach (CaptionButton button in this.CaptionButtons)
{
if (args.HitTest > short.MaxValue && args.HitTest == button.HitTestCode && button.Visible && button.Enabled)
{
((CustomCaptionButton)button).OnClick();
args.Handled = true;
return;
}
}
// find appropriate button
foreach (CaptionButton button in this.CaptionButtons)
{
// [1530]: Don't execute any action when button is disabled or not visible.
if (args.HitTest == button.HitTestCode && button.Visible && button.Enabled)
{
Log(MethodInfo.GetCurrentMethod(), "MouseDown: button = {0}", button);
if (DepressButton(button))
{
if (button.SystemCommand >= 0)
{
int sc = button.SystemCommand;
if (button == _maximizeButton)
{
sc = (WindowState == FormWindowState.Maximized) ?
(int)NativeMethods.SystemCommands.SC_RESTORE : (int)NativeMethods.SystemCommands.SC_MAXIMIZE;
}
NativeMethods.SendMessage(this.Handle,
(int)NativeMethods.WindowMessages.WM_SYSCOMMAND,
(IntPtr)sc, IntPtr.Zero);
}
//TODO: fire event for custom button
args.Handled = true;
}
return;
}
}
}
/// <summary>
/// Called each time one of the mouse buttons was pressed over the non-client area.
/// </summary>
/// <param name="args">NonClientMouseEventArgs contain mouse position, button pressed,
/// and hit-test code for current position. </param>
protected virtual void OnNonClientMouseDown(NonClientMouseEventArgs args)
{
}