QPlatformScreen * QPlatformScreen::platformScreenForWidget(const QWidget *widget)
{
QWidget *window = widget->window();
QWidgetPrivate *windowPrivate = qt_widget_private(window);
QTLWExtra * topData = windowPrivate->topData();
QPlatformIntegration *integration =
QApplicationPrivate::platformIntegration();
return integration->screens()[topData->screenIndex];
}
const QRect QDesktopWidget::screenGeometry(int screenNo) const
{
QPlatformIntegration *pi = QApplicationPrivate::platformIntegration();
QList<QPlatformScreen *> screens = pi->screens();
if (screenNo == -1)
screenNo = 0;
if (screenNo < 0 || screenNo >= screens.size())
return QRect();
else
return screens[screenNo]->geometry();
}
int QDesktopWidget::screenNumber(const QPoint &p) const
{
QPlatformIntegration *pi = QApplicationPrivate::platformIntegration();
QList<QPlatformScreen *> screens = pi->screens();
for (int i = 0; i < screens.size(); ++i)
if (screens[i]->geometry().contains(p))
return i;
return primaryScreen(); //even better would be closest screen
}
QWidget *QApplication::topLevelAt(const QPoint &pos)
{
QPlatformIntegration *pi = QApplicationPrivate::platformIntegration();
QList<QPlatformScreen *> screens = pi->screens();
QList<QPlatformScreen *>::const_iterator screen = screens.constBegin();
QList<QPlatformScreen *>::const_iterator end = screens.constEnd();
// The first screen in a virtual environment should know about all top levels
if (pi->isVirtualDesktop()) {
QWidget *w = (*screen)->topLevelAt(pos);
return w;
}
while (screen != end) {
if ((*screen)->geometry().contains(pos))
return (*screen)->topLevelAt(pos);
++screen;
}
return 0;
}
int QDesktopWidget::numScreens() const
{
QPlatformIntegration *pi = QApplicationPrivate::platformIntegration();
return qMax(pi->screens().size(), 1);
}