/*!
\internal
This function is called from subclasses to add a layout item \a layoutItem
to a layout.
It takes care of automatically reparenting graphics items, if needed.
If \a layoutItem is a is already in a layout, it will remove it from that layout.
*/
void QGraphicsLayoutPrivate::addChildLayoutItem(QGraphicsLayoutItem *layoutItem)
{
Q_Q(QGraphicsLayout);
if (QGraphicsLayoutItem *maybeLayout = layoutItem->parentLayoutItem()) {
if (maybeLayout->isLayout())
removeLayoutItemFromLayout(static_cast<QGraphicsLayout*>(maybeLayout), layoutItem);
}
layoutItem->setParentLayoutItem(q);
if (layoutItem->isLayout()) {
if (QGraphicsItem *parItem = parentItem()) {
static_cast<QGraphicsLayout*>(layoutItem)->d_func()->reparentChildItems(parItem);
}
} else {
if (QGraphicsItem *item = layoutItem->graphicsItem()) {
QGraphicsItem *newParent = parentItem();
QGraphicsItem *oldParent = item->parentItem();
if (oldParent == newParent || !newParent)
return;
#ifdef QT_DEBUG
if (oldParent && item->isWidget()) {
QGraphicsWidget *w = static_cast<QGraphicsWidget*>(item);
qWarning("QGraphicsLayout::addChildLayoutItem: %s \"%s\" in wrong parent; moved to correct parent",
w->metaObject()->className(), w->objectName().toLocal8Bit().constData());
}
#endif
item->setParentItem(newParent);
}
}
}
QT_BEGIN_NAMESPACE
/*!
\internal
\a mw is the new parent. all items in the layout will be a child of \a mw.
*/
void QGraphicsLayoutPrivate::reparentChildItems(QGraphicsItem *newParent)
{
Q_Q(QGraphicsLayout);
int n = q->count();
//bool mwVisible = mw && mw->isVisible();
for (int i = 0; i < n; ++i) {
QGraphicsLayoutItem *layoutChild = q->itemAt(i);
if (!layoutChild) {
// Skip stretch items
continue;
}
if (layoutChild->isLayout()) {
QGraphicsLayout *l = static_cast<QGraphicsLayout*>(layoutChild);
l->d_func()->reparentChildItems(newParent);
} else if (QGraphicsItem *itemChild = layoutChild->graphicsItem()){
QGraphicsItem *childParent = itemChild->parentItem();
#ifdef QT_DEBUG
if (childParent && childParent != newParent && itemChild->isWidget() && qt_graphicsLayoutDebug()) {
QGraphicsWidget *w = static_cast<QGraphicsWidget*>(layoutChild);
qWarning("QGraphicsLayout::addChildLayout: widget %s \"%s\" in wrong parent; moved to correct parent",
w->metaObject()->className(), w->objectName().toLocal8Bit().constData());
}
#endif
if (childParent != newParent)
itemChild->setParentItem(newParent);
}
}
}
/*!
\internal
\a mw is the new parent. all items in the layout will be a child of \a mw.
*/
void QGraphicsLayoutPrivate::reparentChildWidgets(QGraphicsWidget *mw)
{
Q_Q(QGraphicsLayout);
int n = q->count();
//bool mwVisible = mw && mw->isVisible();
for (int i = 0; i < n; ++i) {
QGraphicsLayoutItem *item = q->itemAt(i);
if (item->isLayout()) {
QGraphicsLayout *l = static_cast<QGraphicsLayout*>(item);
l->d_func()->reparentChildWidgets(mw);
} else {
QGraphicsWidget *w = static_cast<QGraphicsWidget*>(item);
QGraphicsWidget *pw = w->parentWidget();
#ifdef QT_DEBUG
if (pw && pw != mw && qt_graphicsLayoutDebug()) {
qWarning("QGraphicsLayout::addChildLayout: widget %s \"%s\" in wrong parent; moved to correct parent",
w->metaObject()->className(), w->objectName().toLocal8Bit().constData());
}
#endif
//bool needShow = mwVisible && !(w->isHidden() && w->testAttribute(Qt::WA_WState_ExplicitShowHide));
if (pw != mw)
w->setParentItem(mw);
//if (needShow)
// QMetaObject::invokeMethod(w, "_q_showIfNotHidden", Qt::QueuedConnection); //show later
}
}
}