private void OnRibbonMdiChildActivate(object sender, EventArgs e)
{
// Cast to correct type
Form topForm = sender as Form;
// Unhook from watching any previous mdi child
if (_activeMdiChild != null)
{
_activeMdiChild.SizeChanged -= OnRibbonMdiChildSizeChanged;
}
_activeMdiChild = topForm.ActiveMdiChild;
// Start watching any new mdi child
if (_activeMdiChild != null)
{
_activeMdiChild.SizeChanged += OnRibbonMdiChildSizeChanged;
}
// Update the pendant buttons with reference to new child
_buttonSpecClose.MdiChild = _activeMdiChild;
_buttonSpecRestore.MdiChild = _activeMdiChild;
_buttonSpecMin.MdiChild = _activeMdiChild;
ButtonSpecManager.RecreateButtons();
PerformNeedPaint(true);
// We never want the mdi child window to have a system menu, we provide the
// pendant buttons as part of the ribbon and so replace the need for it.
PI.SetMenu(new HandleRef(_ribbon, topForm.Handle), NullHandleRef);
if (_activeMdiChild != null)
{
uint windowStyle = PI.GetWindowLong(_activeMdiChild.Handle, PI.GWL_.STYLE);
windowStyle |= PI.WS_.SYSMENU;
PI.SetWindowLong(_activeMdiChild.Handle, PI.GWL_.STYLE, windowStyle);
}
}
public WindowStylesHelper(IntPtr handle)
{
WinStyle = PI.GetWindowLong(handle, PI.GWL_.STYLE);
WinExStyle = PI.GetWindowLong(handle, PI.GWL_.EXSTYLE);
}