protected override void OnCreated(IntPtr hWnd)
{
base.OnCreated(hWnd);
_options.WindowFrameless = true;
_framelessInfo = new FramelessInfo(hWnd);
_framelessOption = _options.FramelessOption;
_dwmFramelessController = new DwmFramelessController(_framelessInfo, _framelessOption, HandleSizeChanged);
_dwmFramelessController.HandleCompositionchanged();
_dwmFramelessController.HandleThemechanged();
}
protected override void OnCreated(IntPtr hWnd)
{
base.OnCreated(hWnd);
if (_options.Fullscreen || _options.KioskMode)
{
throw new NotSupportedException("Fullscreen/Kiok mode is not supported in ChromelyFramelessApp. Please use ChromelyBasicApp instead.");
}
_options.WindowFrameless = true;
_framelessInfo = new FramelessInfo(hWnd);
_framelessOption = _options.FramelessOption;
_dwmFramelessController = new DwmFramelessController(_framelessInfo, _framelessOption, HandleSizeChanged);
_dwmFramelessController.HandleCompositionchanged();
_dwmFramelessController.HandleThemechanged();
}
protected override IntPtr WndProc(IntPtr hWnd, uint message, IntPtr wParam, IntPtr lParam)
{
WM wmMsg = (WM)message;
switch (wmMsg)
{
case WM.PARENTNOTIFY:
{
WM wParmLw = (WM)LOWORD((int)wParam);
switch (wParmLw)
{
case WM.LBUTTONDOWN:
_dwmFramelessController?.InitiateWindowDrag(hWnd, lParam);
return(IntPtr.Zero);
default:
break;
}
}
break;
case WM.DWMCOMPOSITIONCHANGED:
_dwmFramelessController?.HandleCompositionchanged();
return(IntPtr.Zero);
case WM.LBUTTONDOWN:
/* Allow window dragging from any point */
var handlerNullable = _framelessInfo?.Handle;
if (handlerNullable.HasValue)
{
ReleaseCapture();
SendMessageW(handlerNullable.Value, WM.NCLBUTTONDOWN, (IntPtr)HT.CAPTION, IntPtr.Zero);
}
return(IntPtr.Zero);
case WM.NCACTIVATE:
/* DefWindowProc won't repaint the window border if lParam (normally a
* HRGN) is -1. This is recommended in:
* https://blogs.msdn.microsoft.com/wpfsdk/2008/09/08/custom-window-chrome-in-wpf/ */
return(base.WndProc(hWnd, message, wParam, new IntPtr(-1)));
case WM.NCCALCSIZE:
_dwmFramelessController?.HandleNCCalcsize(wParam, lParam);
return(IntPtr.Zero);
case WM.NCHITTEST:
if (_framelessInfo != null)
{
_framelessInfo.ResizeInMotion = true;
var hitTestResultNullable = _dwmFramelessController?.HandleNCHittest(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
_framelessInfo.ResizeInMotion = false;
return(hitTestResultNullable.HasValue ? hitTestResultNullable.Value : IntPtr.Zero);
}
return(IntPtr.Zero);
case WM.NCPAINT:
/* Only block WM_NCPAINT when composition is disabled. If it's blocked
* when composition is enabled, the window shadow won't be drawn. */
var isComposistionEnabedNullable = _framelessInfo?.IsCompositionEnabled;
var isComposistionEnabed = isComposistionEnabedNullable.HasValue ? isComposistionEnabedNullable.Value : false;
if (!isComposistionEnabed)
{
return(IntPtr.Zero);
}
break;
case WM.NCUAHDRAWCAPTION:
case WM.NCUAHDRAWFRAME:
/* These undocumented messages are sent to draw themed window borders.
* Block them to prevent drawing borders over the client area. */
return(IntPtr.Zero);
case WM.SETICON:
case WM.SETTEXT:
/* Disable painting while these messages are handled to prevent them
* from drawing a window caption over the client area, but only when
* composition and theming are disabled. These messages don't paint
* when composition is enabled and blocking WM_NCUAHDRAWCAPTION should
* be enough to prevent painting when theming is enabled. */
isComposistionEnabedNullable = _framelessInfo?.IsCompositionEnabled;
isComposistionEnabed = isComposistionEnabedNullable.HasValue ? isComposistionEnabedNullable.Value : false;
var isThemeEnabledNullable = _framelessInfo?.IsThemeEnabled;
var isThemeEnabledEnabed = isThemeEnabledNullable.HasValue ? isThemeEnabledNullable.Value : false;
if (!isComposistionEnabed && !isThemeEnabledEnabed)
{
var msgResult = _dwmFramelessController?.HandleMessageInvisible(wmMsg, wParam, lParam);
return(msgResult.HasValue ? msgResult.Value : IntPtr.Zero);
}
break;
case WM.THEMECHANGED:
_dwmFramelessController?.HandleThemechanged();
break;
case WM.WINDOWPOSCHANGED:
WINDOWPOS windPos = (WINDOWPOS)Marshal.PtrToStructure(lParam, typeof(WINDOWPOS));
_dwmFramelessController?.HandleWindowPosChanged(windPos);
return(IntPtr.Zero);
case WM.CAPTURECHANGED:
if (lParam == IntPtr.Zero)
{
_dwmFramelessController?.ResetDragOperation();
}
return(IntPtr.Zero);
default:
break;
}
return(base.WndProc(hWnd, message, wParam, lParam));
}
