gizmos: draw shadow so they're still visible on white backdrop

Fixes #2142
2023-02-21 15:02:13 -08:00
parent f9718cdeb0
commit 32c8d08a10
4 changed files with 26 additions and 5 deletions
@@ -29,9 +29,16 @@ LineGizmo::LineGizmo(QObject *parent) :

 void LineGizmo::Draw(QPainter *p) const
 {
-  p->setBrush(Qt::NoBrush);
-  p->setPen(QPen(Qt::white, 0));
+  // Draw transposed black
+  QLineF transposed = p->transform().map(line_);
+  transposed.translate(1, 1);
+  transposed = p->transform().inverted().map(transposed);
+  p->setPen(QPen(Qt::black, 0));
+  p->drawLine(transposed);

+  // Draw normal white polygon
+  p->setPen(QPen(Qt::white, 0));
+  p->setBrush(Qt::NoBrush);
  p->drawLine(line_);
 }