public Padding?GetMargins(Graphics graphics, StateTypeId state)
{
VisualStyleRenderer renderer = GetRenderer(state);
if (renderer == null)
{
return(null);
}
// VisualStyleRenderer.GetMargins always throws an exception, make an explicit API call
int stateId = state.ToInt32(null);
UXTheme.MARGINS margins;
IntPtr hdc = graphics.GetHdc();
try
{
UXTheme.GetThemeMargins(renderer.Handle, hdc, this._partId.ToInt32(null), stateId,
(int)MarginProperty.SizingMargins, IntPtr.Zero, out margins);
// TODO: include padding
return(new Padding(margins.cxLeftWidth, margins.cyTopHeight, margins.cxRightWidth, margins.cyBottomHeight));
}
finally
{
graphics.ReleaseHdc(hdc);
}
}
private VisualStyleRenderer GetRenderer(StateTypeId state)
{
InitRenderers();
VisualStyleRenderer renderer;
_renderers.TryGetValue(state, out renderer);
return(renderer);
}
public void DrawText(Graphics graphics, StateTypeId state, Rectangle rect, string text)
{
VisualStyleRenderer r = GetRenderer(state);
if (r != null)
{
r.DrawText(graphics, rect, text); // TODO: disabled
}
}
public void DrawBackground(Graphics graphics, StateTypeId state, Rectangle rect)
{
VisualStyleRenderer r = GetRenderer(state);
if (r != null)
{
r.DrawBackground(graphics, rect);
}
}
public Size?GetPartSize(Graphics graphics, StateTypeId state)
{
VisualStyleRenderer renderer = GetRenderer(state);
if (renderer == null)
{
return(null);
}
Size size = renderer.GetPartSize(graphics, ThemeSizeType.True);
return(size.AddHorizontally(_paddingLeft?.GetPartSize(graphics, state),
_paddingRight?.GetPartSize(graphics, state)));
}
