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//! [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]
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