1 files changed, 156 insertions, 0 deletions
diff --git a/doc/src/snippets/code/doc_src_porting4-canvas.cpp b/doc/src/snippets/code/doc_src_porting4-canvas.cpp
new file mode 100644
index 0000000..8004163
--- /dev/null
+++ b/doc/src/snippets/code/doc_src_porting4-canvas.cpp
@@ -0,0 +1,156 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [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]