X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fpainter.cpp;h=046dd2a7d92fa0c608c1370a57c4d3d1a4700392;hb=57056be35f9295400dd873a17d8468b3287ebc0c;hp=6145638c8a022080a30aab44122498ff0fcd9eb1;hpb=771113b26ca27707c96fdcd80d79a08e40884268;p=architektonas

diff --git a/src/painter.cpp b/src/painter.cpp
index 6145638..046dd2a 100644
--- a/src/painter.cpp
+++ b/src/painter.cpp
@@ -177,6 +177,32 @@ void Painter::DrawHandle(Vector center)
 }
 
 
+// This function is for drawing object handles without regard for zoom level;
+// we don't want our object handle size to depend on the zoom level!
+void Painter::DrawArrowHandle(Vector center, double angle)
+{
+	center = CartesianToQtCoords(center);
+	QPolygonF arrow;
+
+	// Since we're drawing directly on the screen, the Y is inverted. So we use
+	// the mirror of the angle.
+	double orthoAngle = -angle + (PI / 2.0);
+	Vector orthogonal = Vector(cos(orthoAngle), sin(orthoAngle));
+	Vector unit = Vector(cos(-angle), sin(-angle));
+
+	Point p0 = center + (unit * 6.0);
+	Point p1 = center + (unit * 21.0);
+	Point p1b = center + (unit * 11.0);
+	Point p2 = p1b + (orthogonal * 5.0);
+	Point p3 = p1b - (orthogonal * 5.0);
+
+	painter->drawLine(p0.x, p0.y, p1.x, p1.y);
+	arrow << QPointF(p1.x, p1.y) << QPointF(p2.x, p2.y) << QPointF(p3.x, p3.y);
+
+	painter->drawPolygon(arrow);
+}
+
+
 void Painter::DrawLine(int x1, int y1, int x2, int y2)
 {
 	if (!painter)