protected override void OnPaintBackground(PaintEventArgs e)
{
if (!DwmAPI.DwmIsCompositionEnabled() || DesignMode)
{
base.OnPaintBackground(e);
}
}
public IntPtr PreviewWindowMessage(IntPtr hWindow, int message, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch (message)
{
case WM_COMPOSITIONCHANGED:
this.NotifyCompositionChanged();
return(IntPtr.Zero);
case WM_NCCALCSIZE:
if (this.firstTimeNonClientCalc)
{
// Suppress first time, otherwise glass effect will be messed up..
this.firstTimeNonClientCalc = false;
return(IntPtr.Zero);
}
else
{
if (this.nonClientAreaDrawingEnabled && wParam != IntPtr.Zero) //TRUE
{
//no nonclient frame
handled = true;
return(IntPtr.Zero);
}
else
{
return(IntPtr.Zero);
}
}
case WM_NCHITTEST:
IntPtr Result = IntPtr.Zero;
if (this.dwmIsCompositionEnabled)
{
handled = DwmAPI.DwmDefWindowProc(hWindow, message, wParam, lParam, out Result);
}
if (handled == false)
{
uint Coordinates;
checked
{
Coordinates = (uint)lParam.ToInt32();
}
NonClientArea NonClientArea = this.nonClientHitTest(Coordinates.GetLoUShort(), Coordinates.GetHiUShort());
if (NonClientArea != NonClientArea.HTNOWHERE)
{
Result = new IntPtr((int)NonClientArea);
handled = true;
}
}
return(Result);
default:
return(IntPtr.Zero);
}
}
protected override void OnPaint(PaintEventArgs e)
{
if (DwmAPI.DwmIsCompositionEnabled() && !DesignMode)
{
UXTheme.DrawText(e.Graphics, Text, this.Font, ClientRectangle, ForeColor, TextAlignToFormatFlags(TextAlign) | TextFormatFlags.NoClipping, UXTheme.TextStyle.Glowing);
}
else
{
base.OnPaint(e);
}
}
internal GlassWindowHelper(IntPtr windowHandle, DwmAPI.Margins margins, bool blurClientArea, bool nonClientAreaDrawingEnabled, Action notifyDwmCompositionChanged, Func <ushort, ushort, NonClientArea> nonClientHitTest)
{
this.windowHandle = windowHandle;
this.dwmIsCompositionEnabled = DwmAPI.IsCompositionEnabled();
this.margins = margins;
this.blurClientArea = blurClientArea;
this.notifyDwmCompositionChanged = notifyDwmCompositionChanged;
this.UpdateGlassEffect();
this.UpdateNonClientArea();
this.nonClientAreaDrawingEnabled = nonClientAreaDrawingEnabled;
this.nonClientHitTest = nonClientHitTest;
this.UpdateNonClientArea();
}
protected void NotifyCompositionChanged()
{
this.dwmIsCompositionEnabled = DwmAPI.IsCompositionEnabled();
this.UpdateGlassEffect();
this.notifyDwmCompositionChanged();
}
private void UpdateGlassEffect()
{
DwmAPI.EnableGlassEffect(this.windowHandle, this.margins);
DwmAPI.EnableBlurBehindWindow(this.windowHandle, this.blurClientArea);
}
private void UpdateNonClientArea()
{
DwmAPI.SetWindowPos(this.windowHandle, IntPtr.Zero, 0, 0, 0, 0, 0x27 /*SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED*/);
}
