/// <summary>
/// paint header background
/// </summary>
/// <param name="pcust"></param>
/// <param name="rect"></param>
internal virtual void PaintBackGround(NativeCustomDraw.NMCUSTOMDRAW pcust, NativeWindowCommon.RECT rect)
{
if (TitleBrush != IntPtr.Zero)
{
NativeWindowCommon.FillRect(pcust.hdc, ref rect, TitleBrush);
}
}
/// <summary>
/// Draw Header section filter
/// </summary>
/// <param name="hdc"></param>
/// <param name="rct"></param>
/// <param name="g"></param>
public void DrawFilter(IntPtr hdc, NativeWindowCommon.RECT rct)
{
//Filter line drawing
int x = rct.right - FILTER_WIDTH;
int bottomY = 0;
Header.HeaderRenderer.DrawLine(hdc, new Point(x, bottomY), new Point(x, Header.FilterHeight));
//Filter highlight drawing
NativeWindowCommon.RECT rectHighlight = new NativeWindowCommon.RECT()
{
bottom = Header.FilterHeight,
top = 0,
left = rct.right - FILTER_WIDTH + 1,
right = rct.right + 1
};
if ((FilterColor != Color.Empty) && !Header.OnSectionResize)
{
if (Header.TitleColor != Color.Empty)
{
Header.HighlightBrush = NativeWindowCommon.CreateSolidBrush(ColorTranslator.ToWin32(FilterColor));
}
else
{
Header.HighlightBrush = NativeWindowCommon.CreateSolidBrush(ColorTranslator.ToWin32(Color.FromArgb(255, 149, 202, 255)));
}
NativeWindowCommon.FillRect(hdc, ref rectHighlight, Header.HighlightBrush);
NativeWindowCommon.DeleteObject(Header.HighlightBrush);
}
int filterWidthIcon = FILTER_WIDTH / 3;
//Filter arrow drawing
NativeWindowCommon.POINT[] points = new NativeWindowCommon.POINT[3];
//right
points[0].x = rct.right - filterWidthIcon;
points[0].y = rct.top + (rct.bottom - rct.top) / 2 - 2;
// center point
points[1].x = rct.right - FILTER_WIDTH / 2;
points[1].y = points[0].y + filterWidthIcon / 2;
// left point
points[2].x = points[0].x - filterWidthIcon;
points[2].y = points[0].y;
NativeWindowCommon.SelectObject(hdc, Header.FilterBrush);
NativeWindowCommon.SelectObject(hdc, Header.FilterPen);
NativeWindowCommon.Polygon(hdc, points, 3);
}