1 files changed, 116 insertions, 0 deletions
diff --git a/doc/src/snippets/code/doc_src_porting4-canvas.qdoc b/doc/src/snippets/code/doc_src_porting4-canvas.qdoc
new file mode 100644
index 0000000..e386607
--- /dev/null
+++ b/doc/src/snippets/code/doc_src_porting4-canvas.qdoc
@@ -0,0 +1,116 @@
+//! [0]
+item->scene().sceneRect().intersects(item->sceneBoundingRect());
+//! [0]
+
+
+//! [1]
+class TileScene : public QGraphicsScene
+{
+public:
+    ...
+
+    void setTiles(const QPixmap &pixmap, int h, int v,
+                  int tileHeight, int tileWidth);
+    void setTile(int x, int y, int tilenum);
+
+private:
+    QRect tileRect(int x, int y) const;
+    QRect tileRect(int tileNum) const;
+
+    QVector<QVector<int> > tiles;
+    QPixmap tilePixmap;
+    int tileW, tileH;
+    int hTiles, vTiles;
+};
+//! [1]
+
+
+//! [2]
+void TileScene::setTiles(const QPixmap &pixmap, int h, int v,
+                         int tileHeight, int tileWidth)
+{
+    tilePixmap = pixmap;
+    tileW = tileWidth;
+    tileH = tileHeight;
+    hTiles = h;
+    vTiles = v;
+
+    tiles.resize(v);
+    for (int y = 0; y < v; ++y)
+        tiles[y].resize(h);
+}
+//! [2]
+
+
+//! [3]
+void TileScene::setTile(int x, int y, int tilenum)
+{
+    tiles[y][x] = tilenum;
+    update(tileRect(x, y));
+}
+//! [3]
+
+
+//! [4]
+QRect TileScene::tileRect(int x, int y) const
+{
+    return QRect(x * tileW, y * tileH, tileW, tileH);
+}
+//! [4]
+
+
+//! [5]
+QRect TileScene::tileRect(int tileNum) const
+{
+    int numHTiles = tilePixmap.width() / tileW;
+    int numVTiles = tilePixmap.height() / tileH;
+    return tileRect(tileNum % numHTiles, tileNum / numHTiles);
+}
+//! [5]
+
+
+//! [6]
+void drawBackground(QPainter *painter, const QRectF &exposed)
+{
+    for (int y = 0; y < vTiles; ++y) {
+        for (int x = 0; x < hTiles; ++x) {
+            QRect destRect = tileRect(x, y);
+            if (exposed.intersects(destRect)) {
+                painter->drawPixmap(destRect, tilePixmap,
+                                    tileRect(tiles[y][x]));
+            }
+        }
+    }
+}
+//! [6]
+
+
+//! [7]
+    // Before
+    Q3CanvasEllipse ellipse(10, 10);
+
+    // After
+    QGraphicsEllipseItem ellipse(-5, -5, 10, 10);
+//! [7]
+
+
+//! [8]
+static QPainterPath fromControlPoints(const Q3PointArray &pa)
+{
+    QPainterPath path;
+    path.moveTo(pa[0]);
+    for (int i = 1; i < pa.size(); i += 3)
+        path.cubicTo(pa[i], pa[(i + 1) % pa.size()], pa[(i + 2) % pa.size()]);
+    return path;
+}
+//! [8]
+
+
+//! [9]
+wildcardPath.replace("%1", "*");
+QFileInfo fi(wildcardPath);
+
+QList<QPixmap> frames;
+foreach (QString entry, QDir(fi.path(), fi.fileName()).entryList())
+    frames << QPixmap(fi.path() + "/" + entry);
+//! [9]