/// <include file='doc\VisualStyleRenderer.uex' path='docs/doc[@for="VisualStyleRenderer.GetMargins"]/*' />
/// <devdoc>
/// <para>
/// [See win32 equivalent.]
/// </para>
/// </devdoc>
public Padding GetMargins(IDeviceContext dc, MarginProperty prop) {
if( dc == null ){
throw new ArgumentNullException("dc");
}
//valid values are 0xe11 to 0xe13
if (!ClientUtils.IsEnumValid(prop, (int)prop, (int)MarginProperty.SizingMargins, (int)MarginProperty.CaptionMargins))
{
throw new InvalidEnumArgumentException("prop", (int)prop, typeof(MarginProperty));
}
NativeMethods.MARGINS margins = new NativeMethods.MARGINS();
using( WindowsGraphicsWrapper wgr = new WindowsGraphicsWrapper( dc, AllGraphicsProperties ) ) {
HandleRef hdc = new HandleRef( wgr, wgr.WindowsGraphics.DeviceContext.Hdc );
lastHResult = SafeNativeMethods.GetThemeMargins( new HandleRef( this, Handle ), hdc, part, state, (int) prop, ref margins );
}
return new Padding(margins.cxLeftWidth, margins.cyTopHeight, margins.cxRightWidth, margins.cyBottomHeight);
}
/// <summary>
/// Paints the glass effect on the screen.
/// </summary>
/// <param name="g"></param>
protected virtual void PaintGlass(Graphics g)
{
if (!GlassUtility.IsGlassEnabled)
return;
if (!this.DesignMode)
{
// Paint the glass effect.
NativeMethods.MARGINS m = new NativeMethods.MARGINS(_margin);
NativeMethods.DwmExtendFrameIntoClientArea(this.Handle, ref m);
}
// Paint the glass effect.
using (Brush b = new SolidBrush(Color.Black))
{
if (_fullWindow)
{
g.FillRectangle(b, this.ClientRectangle);
}
else
{
_rects[0] = new Rectangle(0, 0, this.Width, _margin.Top);
_rects[1] = new Rectangle(this.ClientRectangle.Width - _margin.Right, 0, _margin.Right, this.Height);
_rects[2] = new Rectangle(0, this.ClientRectangle.Height - _margin.Bottom, this.Width, _margin.Bottom);
_rects[3] = new Rectangle(0, 0, _margin.Left, this.Height);
g.FillRectangles(b, _rects);
}
}
}