/// <summary>
/// Redraws the non client area.
/// </summary>
/// <param name="invalidateBuffer">if set to <c>true</c> the buffer is invalidated.</param>
/// <returns>true if the original painting should be suppressed otherwise false.</returns>
protected internal virtual bool OnNcPaint(bool invalidateBuffer)
{
if (!IsProcessNcArea)
{
return(false);
}
bool result = false;
try
{
SkinningFormPaintData paintData = CreatePaintData();
// create painting meta data for caption buttons
if (_captionButtons.Count > 0)
{
paintData.CaptionButtons = new CaptionButtonPaintData[_captionButtons.Count];
for (int i = 0; i < _captionButtons.Count; i++)
{
CaptionButton button = _captionButtons[i];
CaptionButtonPaintData buttonData = new CaptionButtonPaintData()
{
BaseData = new PaintDataBase(_basePaintParas._bufferGraphics.Graphics, button.Bounds),
Pressed = button.Pressed,
Hovered = button.Hovered,
Enabled = button.Enabled,
HitTest = button.HitTest
};
paintData.CaptionButtons[i] = buttonData;
}
}
// paint
result = OnNcPaint(paintData);
// render buffered graphics
if (_basePaintParas._bufferGraphics != null)
{
_basePaintParas._bufferGraphics.Render(_basePaintParas._g);
}
}
catch (System.Exception)
{
result = false;
}
_basePaintParas.Reset();
return(result);
}
/// <summary>
/// Gets the button paint indices.
/// </summary>
/// <param name="button">The button paint info.</param>
/// <param name="active">A value indicating whether the button is active.</param>
/// <param name="buttonIndex">Index of the button icon image strip.</param>
/// <param name="rendererIndex">Index of the button background image strip.</param>
public static void GetButtonData(CaptionButtonPaintData button, bool active, out int buttonIndex, out int rendererIndex)
{
if (!button.Enabled)
{
rendererIndex = -1;
buttonIndex = 4;
}
else if (button.Pressed)
{
buttonIndex = active ? 2 : 3;
rendererIndex = 1;
}
else if (button.Hovered)
{
buttonIndex = active ? 1 : 3;
rendererIndex = 0;
}
else
{
buttonIndex = active ? 0 : 3;
rendererIndex = -1;
}
}
