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#include <QGraphicsWidget>
#include <QGraphicsProxyWidget>
#include <QGraphicsAnchorLayout>
#include <QtGui>
//#define BENCHMARK_RUN 1
#define CALLGRIND_DEBUG 1
#if defined(BENCHMARK_RUN)
// Callgrind command line:
// valgrind --tool=callgrind --instr-atstart=no ./anchorlayout >/dev/null 2>&1
#if defined(CALLGRIND_DEBUG)
#include <valgrind/callgrind.h>
#else
#define CALLGRIND_START_INSTRUMENTATION do { } while (0)
#define CALLGRIND_STOP_INSTRUMENTATION do { } while (0)
#endif
#endif
static QGraphicsProxyWidget *createItem(const QSizeF &minimum = QSizeF(100.0, 100.0),
const QSizeF &preferred = QSize(150.0, 100.0),
const QSizeF &maximum = QSizeF(200.0, 100.0),
const QString &name = "0")
{
QGraphicsProxyWidget *w = new QGraphicsProxyWidget;
w->setWidget(new QPushButton(name));
w->setData(0, name);
w->setMinimumSize(minimum);
w->setPreferredSize(preferred);
w->setMaximumSize(maximum);
return w;
}
class Test : public QObject
{
Q_OBJECT;
public:
Test(QGraphicsWidget *wi, QGraphicsLayout* la)
: QObject(), w(wi), l(la), first(true) {}
QGraphicsWidget *w;
QGraphicsLayout *l;
bool first;
public slots:
void onTimer() {
if (first) {
first = false;
w->setContentsMargins(10, 10, 10, 10);
} else {
l->setContentsMargins(10, 10, 10, 10);
}
}
};
int main(int argc, char **argv)
{
QApplication app(argc, argv);
QGraphicsScene *scene = new QGraphicsScene();
scene->setSceneRect(0, 0, 800, 480);
QSizeF min(30, 100);
QSizeF pref(210, 100);
QSizeF max(300, 100);
QGraphicsProxyWidget *a = createItem(min, pref, max, "A");
QGraphicsProxyWidget *b = createItem(min, pref, max, "B");
QGraphicsProxyWidget *c = createItem(min, pref, max, "C");
QGraphicsProxyWidget *d = createItem(min, pref, max, "D");
QGraphicsProxyWidget *e = createItem(min, pref, max, "E");
QGraphicsProxyWidget *f = createItem(QSizeF(30, 50), QSizeF(150, 50), max, "F");
QGraphicsProxyWidget *g = createItem(QSizeF(30, 50), QSizeF(30, 100), max, "G");
QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
QGraphicsWidget *w = new QGraphicsWidget(0, Qt::Window);
w->setPos(20, 20);
w->setLayout(l);
// vertical
l->anchor(a, QGraphicsAnchorLayout::Top, l, QGraphicsAnchorLayout::Top, 0);
l->anchor(b, QGraphicsAnchorLayout::Top, l, QGraphicsAnchorLayout::Top, 0);
l->anchor(c, QGraphicsAnchorLayout::Top, a, QGraphicsAnchorLayout::Bottom, 0);
l->anchor(c, QGraphicsAnchorLayout::Top, b, QGraphicsAnchorLayout::Bottom, 0);
l->anchor(c, QGraphicsAnchorLayout::Bottom, d, QGraphicsAnchorLayout::Top, 0);
l->anchor(c, QGraphicsAnchorLayout::Bottom, e, QGraphicsAnchorLayout::Top, 0);
l->anchor(d, QGraphicsAnchorLayout::Bottom, l, QGraphicsAnchorLayout::Bottom, 0);
l->anchor(e, QGraphicsAnchorLayout::Bottom, l, QGraphicsAnchorLayout::Bottom, 0);
l->anchor(c, QGraphicsAnchorLayout::Top, f, QGraphicsAnchorLayout::Top, 0);
l->anchor(c, QGraphicsAnchorLayout::VCenter, f, QGraphicsAnchorLayout::Bottom, 0);
l->anchor(f, QGraphicsAnchorLayout::Bottom, g, QGraphicsAnchorLayout::Top, 0);
l->anchor(c, QGraphicsAnchorLayout::Bottom, g, QGraphicsAnchorLayout::Bottom, 0);
// horizontal
l->anchor(l, QGraphicsAnchorLayout::Left, a, QGraphicsAnchorLayout::Left, 0);
l->anchor(l, QGraphicsAnchorLayout::Left, d, QGraphicsAnchorLayout::Left, 0);
l->anchor(a, QGraphicsAnchorLayout::Right, b, QGraphicsAnchorLayout::Left, 0);
l->anchor(a, QGraphicsAnchorLayout::Right, c, QGraphicsAnchorLayout::Left, 0);
l->anchor(c, QGraphicsAnchorLayout::Right, e, QGraphicsAnchorLayout::Left, 0);
l->anchor(b, QGraphicsAnchorLayout::Right, l, QGraphicsAnchorLayout::Right, 0);
l->anchor(e, QGraphicsAnchorLayout::Right, l, QGraphicsAnchorLayout::Right, 0);
l->anchor(d, QGraphicsAnchorLayout::Right, e, QGraphicsAnchorLayout::Left, 0);
l->anchor(l, QGraphicsAnchorLayout::Left, f, QGraphicsAnchorLayout::Left, 0);
l->anchor(l, QGraphicsAnchorLayout::Left, g, QGraphicsAnchorLayout::Left, 0);
l->anchor(f, QGraphicsAnchorLayout::Right, g, QGraphicsAnchorLayout::Right, 0);
#ifdef BENCHMARK_RUN
CALLGRIND_START_INSTRUMENTATION;
for (int i = 0; i < 100; i++) {
l->invalidate();
l->d_ptr->calculateGraphs();
}
CALLGRIND_STOP_INSTRUMENTATION;
return 0;
#endif
scene->addItem(w);
scene->setBackgroundBrush(Qt::darkGreen);
QGraphicsView *view = new QGraphicsView(scene);
view->show();
Test test(w, l);
QTimer timer;
test.connect(&timer, SIGNAL(timeout()), SLOT(onTimer()));
timer.start(5000);
int rc = app.exec();
delete scene;
delete view;
return rc;
}
#include "main.moc"
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