1 files changed, 51 insertions, 0 deletions
diff --git a/doc/codesnippets/doc/src/snippets/code/src_qt3support_canvas_q3canvas.cpp b/doc/codesnippets/doc/src/snippets/code/src_qt3support_canvas_q3canvas.cpp
new file mode 100644
index 000000000..bca056c9d
--- /dev/null
+++ b/doc/codesnippets/doc/src/snippets/code/src_qt3support_canvas_q3canvas.cpp
@@ -0,0 +1,51 @@
+//! [0]
+QPrinter pr;
+if (pr.setup()) {
+    QPainter p(&pr);
+    canvas.drawArea(canvas.rect(), &p);
+}
+//! [0]
+
+
+//! [1]
+void MyCanvasView::contentsMousePressEvent(QMouseEvent* e)
+{
+    Q3CanvasItemList l = canvas()->collisions(e->pos());
+    for (Q3CanvasItemList::Iterator it=l.begin(); it!=l.end(); ++it) {
+        if ((*it)->rtti() == Q3CanvasRectangle::RTTI)
+            qDebug("A Q3CanvasRectangle lies somewhere at this point");
+    }
+}
+//! [1]
+
+
+//! [2]
+QMatrix wm;
+wm.scale(2, 2);   // Zooms in by 2 times
+wm.rotate(90);    // Rotates 90 degrees counter clockwise
+                  // around the origin.
+wm.translate(0, -canvas->height());
+                  // moves the canvas down so what was visible
+                  // before is still visible.
+myCanvasView->setWorldMatrix(wm);
+//! [2]
+
+
+//! [3]
+QRect rc = QRect(myCanvasView->contentsX(), myCanvasView->contentsY(),
+                 myCanvasView->visibleWidth(), myCanvasView->visibleHeight());
+QRect canvasRect = myCanvasView->inverseWorldMatrix().mapRect(rc);
+//! [3]
+
+
+//! [4]
+Q3CanvasItem* item;
+// Find an item, e.g. with Q3CanvasItem::collisions().
+...
+if (item->rtti() == MySprite::RTTI) {
+    MySprite* s = (MySprite*)item;
+    if (s->isDamagable()) s->loseHitPoints(1000);
+    if (s->isHot()) myself->loseHitPoints(1000);
+    ...
+}
+//! [4]