const QRect QDesktopWidget::availableGeometry(int screenNo) const
{
const QScreen *screen = QScreen::instance();
if (screenNo == -1)
screenNo = 0;
if (!screen || screenNo < 0)
return QRect();
const QList<QScreen*> subScreens = screen->subScreens();
if (!subScreens.isEmpty()) {
if (screenNo >= subScreens.size())
return QRect();
screen = subScreens.at(screenNo);
}
QApplicationPrivate *ap = QApplicationPrivate::instance();
const QRect r = ap->maxWindowRect(screen);
if (!r.isEmpty())
return r;
return screen->region().boundingRect();
}
void QWSManager::handleMove(QPoint g)
{
Q_D(QWSManager);
// don't allow dragging to where the user probably cannot click!
QApplicationPrivate *ap = QApplicationPrivate::instance();
const QRect maxWindowRect = ap->maxWindowRect(qt_screen);
if (maxWindowRect.isValid()) {
if (g.x() < maxWindowRect.x())
g.setX(maxWindowRect.x());
if (g.y() < maxWindowRect.y())
g.setY(maxWindowRect.y());
if (g.x() > maxWindowRect.right())
g.setX(maxWindowRect.right());
if (g.y() > maxWindowRect.bottom())
g.setY(maxWindowRect.bottom());
}
if (g == d->mousePos)
return;
if ( d->managed->isMaximized() )
return;
int x = d->managed->geometry().x();
int y = d->managed->geometry().y();
int w = d->managed->width();
int h = d->managed->height();
QRect geom(d->managed->geometry());
QPoint delta = g - d->mousePos;
d->mousePos = g;
if (d->activeRegion == QDecoration::Title) {
geom = QRect(x + delta.x(), y + delta.y(), w, h);
} else {
bool keepTop = true;
bool keepLeft = true;
switch (d->activeRegion) {
case QDecoration::Top:
geom.setTop(geom.top() + delta.y());
keepTop = false;
break;
case QDecoration::Bottom:
geom.setBottom(geom.bottom() + delta.y());
keepTop = true;
break;
case QDecoration::Left:
geom.setLeft(geom.left() + delta.x());
keepLeft = false;
break;
case QDecoration::Right:
geom.setRight(geom.right() + delta.x());
keepLeft = true;
break;
case QDecoration::TopRight:
geom.setTopRight(geom.topRight() + delta);
keepLeft = true;
keepTop = false;
break;
case QDecoration::TopLeft:
geom.setTopLeft(geom.topLeft() + delta);
keepLeft = false;
keepTop = false;
break;
case QDecoration::BottomLeft:
geom.setBottomLeft(geom.bottomLeft() + delta);
keepLeft = false;
keepTop = true;
break;
case QDecoration::BottomRight:
geom.setBottomRight(geom.bottomRight() + delta);
keepLeft = true;
keepTop = true;
break;
default:
return;
}
QSize newSize = QLayout::closestAcceptableSize(d->managed, geom.size());
int dx = newSize.width() - geom.width();
int dy = newSize.height() - geom.height();
if (keepTop) {
geom.setBottom(geom.bottom() + dy);
d->mousePos.ry() += dy;
} else {
geom.setTop(geom.top() - dy);
d->mousePos.ry() -= dy;
}
if (keepLeft) {
geom.setRight(geom.right() + dx);
d->mousePos.rx() += dx;
} else {
geom.setLeft(geom.left() - dx);
d->mousePos.rx() -= dx;
}
}
if (geom != d->managed->geometry()) {
QApplication::sendPostedEvents();
d->managed->setGeometry(geom);
}
}
