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Added implementation for Painter::DrawArc.

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git-svn-id: svn://ultimatepp.org/upp/trunk@1456 f0d560ea-af0d-0410-9eb7-867de7ffcac7
This commit is contained in:
rylek 2009-07-30 19:54:41 +00:00
parent b89b94e30a
commit 53af28a208
1 changed files with 12 additions and 0 deletions
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12
uppsrc/Painter/DrawOp.cpp
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@ -128,6 +128,18 @@ void Painter::DrawPolyPolyPolygonOp(const Point *vertices, int vertex_count,
void Painter::DrawArcOp(const Rect& rc, Point start, Point end, int width, Color color)
{
if(rc.Width() <= 0 || rc.Height() <= 0)
return;
Sizef radius = Sizef(rc.Size()) / 2.0;
Pointf center = Pointf(rc.TopLeft()) + radius;
double ang1 = Bearing((Pointf(start) - center) / radius);
double ang2 = Bearing((Pointf(end) - center) / radius);
double sweep = ang1 - ang2;
if(sweep <= 0)
sweep += 2 * M_PI;
Move(center.x + radius.cx * cos(ang1), center.y + radius.cy * sin(ang1));
Arc(center, radius.cx, radius.cy, ang1, -sweep);
Stroke(max(width, 0), color);
}
void Painter::DrawEllipseOp(const Rect& r, Color color, int pen, Color pencolor)