/// <summary>
/// Draws a tree-control style expander, which looks like a square with
/// a dash (expanded) or a cross (unexpanded)</summary>
/// <param name="g">The Direct2D graphics object</param>
/// <param name="x">X coordinate of expander top left corner</param>
/// <param name="y">Y coordinate of expander top left corner</param>
/// <param name="size">Size of expander, in pixels</param>
/// <param name="brush">Brush</param>
/// <param name="expanded">Whether or not expander should appear "expanded"</param>
public static void DrawExpander(this D2dGraphics g, float x, float y, float size, D2dBrush brush, bool expanded)
{
s_expanderPoints[0] = new PointF(x, y + size);
if (expanded)
{
s_expanderPoints[1] = new PointF(x + size, y + size);
s_expanderPoints[2] = new PointF(x + size, y);
g.FillPolygon(s_expanderPoints, brush);
}
else
{
s_expanderPoints[1] = new PointF(x + size, y + size / 2);
s_expanderPoints[2] = new PointF(x, y);
g.DrawPolygon(s_expanderPoints, brush, 1.0f);
}
}
/// <summary>
/// Draws a tree-control style expander, which looks like a square with
/// a dash (expanded) or a cross (unexpanded)</summary>
/// <param name="g">The Direct2D graphics object</param>
/// <param name="x">X coordinate of expander top left corner</param>
/// <param name="y">Y coordinate of expander top left corner</param>
/// <param name="size">Size of expander, in pixels</param>
/// <param name="brush">Brush</param>
/// <param name="expanded">Whether or not expander should appear "expanded"</param>
public static void DrawExpander(this D2dGraphics g, float x, float y, float size, D2dBrush brush, bool expanded)
{
s_expanderPoints[0] = new PointF(x, y + size);
if (expanded)
{
s_expanderPoints[1] = new PointF(x + size, y + size);
s_expanderPoints[2] = new PointF(x + size, y);
g.FillPolygon(s_expanderPoints, brush);
}
else
{
s_expanderPoints[1] = new PointF(x + size, y + size / 2);
s_expanderPoints[2] = new PointF(x, y);
g.DrawPolygon(s_expanderPoints, brush, 1.0f);
}
//g.DrawRectangle(new RectangleF(x, y, size, size), brush);
//float lineLength = size - 4;
//float center = size / 2;
//g.DrawLine(x + 2, y + center, x + 2 + lineLength, y + center, brush);
//if (!expanded)
// g.DrawLine(x + center, y + 2, x + center, y + 2 + lineLength, brush);
}
