protected override Color GetBackgroundColor() => GridEntryHost.GetLineColor();
public override void PaintOutline(System.Drawing.Graphics g, Rectangle r)
{
// draw outline pointer triangle.
if (Expandable)
{
bool fExpanded = Expanded;
Rectangle outline = OutlineRect;
// make sure we're in our bounds
outline = Rectangle.Intersect(r, outline);
if (outline.IsEmpty)
{
return;
}
#if PAINT_CATEGORY_TRIANGLE
// bump it over a pixel
//outline.Offset(1, 0);
//outline.Inflate(-1,-1);
// build the triangle, an equalaterial centered around the midpoint of the rect.
Point[] points = new Point[3];
int borderWidth = 2;
// width is always the length of the sides of the triangle.
// Height = (width /2 * (Cos60)) ; Cos60 ~ .86
int triWidth, triHeight;
int xOffset, yOffset;
if (!fExpanded)
{
// draw arrow pointing right, remember height is pointing right
// 0
// |\
// | \2
// | /
// |/
// 1
triWidth = (int)((outline.Height * TRI_WIDTH_RATIO) - (2 * borderWidth));
// make sure it's an odd width so our lines will match up
if (!(triWidth % 2 == 0))
{
triWidth++;
}
triHeight = (int)Math.Ceil((triWidth / 2) * TRI_HEIGHT_RATIO);
yOffset = outline.Y + (outline.Height - triWidth) / 2;
xOffset = outline.X + (outline.Width - triHeight) / 2;
points[0] = new Point(xOffset, yOffset);
points[1] = new Point(xOffset, yOffset + triWidth);
points[2] = new Point(xOffset + triHeight, yOffset + (triWidth / 2));
}
else
{
// draw arrow pointing down
// 0 -------- 1
// \ /
// \ /
// \ /
// \/
// 2
triWidth = (int)((outline.Width * TRI_WIDTH_RATIO) - (2 * borderWidth));
// make sure it's an odd width so our lines will match up
if (!(triWidth % 2 == 0))
{
triWidth++;
}
triHeight = (int)Math.Ceil((triWidth / 2) * TRI_HEIGHT_RATIO);
xOffset = outline.X + (outline.Width - triWidth) / 2;
yOffset = outline.Y + (outline.Height - triHeight) / 2;
points[0] = new Point(xOffset, yOffset);
points[1] = new Point(xOffset + triWidth, yOffset);
points[2] = new Point(xOffset + (triWidth / 2), yOffset + triHeight);
}
g.FillPolygon(SystemPens.WindowText, points);
#else
// draw border area box
Brush b;
Pen p;
bool disposeBrush = false;
bool disposePen = false;
Color color = GridEntryHost.GetLineColor();
b = new SolidBrush(g.GetNearestColor(color));
disposeBrush = true;
color = GridEntryHost.GetTextColor();
p = new Pen(g.GetNearestColor(color));
disposePen = true;
g.FillRectangle(b, outline);
g.DrawRectangle(p, outline.X, outline.Y, outline.Width - 1, outline.Height - 1);
// draw horizontal line for +/-
int indent = 2;
g.DrawLine(SystemPens.WindowText, outline.X + indent, outline.Y + outline.Height / 2,
outline.X + outline.Width - indent - 1, outline.Y + outline.Height / 2);
// draw vertical line to make a +
if (!fExpanded)
{
g.DrawLine(SystemPens.WindowText, outline.X + outline.Width / 2, outline.Y + indent,
outline.X + outline.Width / 2, outline.Y + outline.Height - indent - 1);
}
if (disposePen)
{
p.Dispose();
}
if (disposeBrush)
{
b.Dispose();
}
#endif
}
}
