/*!
\internal
*/
void QGraphicsWidgetPrivate::clearFocusWidget()
{
// Reset focus child chain.
QGraphicsWidget *parent = static_cast<QGraphicsWidget *>(q_ptr);
do {
if (parent->d_func()->focusChild != q_ptr)
break;
parent->d_func()->focusChild = 0;
} while (!parent->isWindow() && (parent = parent->parentWidget()));
}
/**
* is called after a reparent has taken place to fix up the focus chain(s)
*/
void QGraphicsWidgetPrivate::fixFocusChainBeforeReparenting(QGraphicsWidget *newParent, QGraphicsScene *oldScene, QGraphicsScene *newScene)
{
Q_Q(QGraphicsWidget);
Q_ASSERT(focusNext && focusPrev);
if (q_ptr->isPanel()) {
// panels are never a part of their parent's or ancestors' focus
// chains. so reparenting a panel is easy; there's nothing to
// do.
return;
}
// we're not a panel, so find the first widget in the focus chain
// (this), and the last (this, or the last widget that is still
// a descendent of this). also find the widgets that currently /
// before reparenting point to this widgets' focus chain.
QGraphicsWidget *focusFirst = q;
QGraphicsWidget *focusBefore = focusPrev;
QGraphicsWidget *focusLast = focusFirst;
QGraphicsWidget *focusAfter = focusNext;
do {
if (!q->isAncestorOf(focusAfter))
break;
focusLast = focusAfter;
} while ((focusAfter = focusAfter->d_func()->focusNext));
if (!parent && oldScene && oldScene != newScene && oldScene->d_func()->tabFocusFirst == q) {
// detach from old scene's top level focus chain.
oldScene->d_func()->tabFocusFirst = (focusAfter != q) ? focusAfter : 0;
}
// detach from current focus chain; skip this widget subtree.
focusBefore->d_func()->focusNext = focusAfter;
focusAfter->d_func()->focusPrev = focusBefore;
if (newParent) {
// attach to new parent's focus chain as the last element
// in its chain.
QGraphicsWidget *newFocusFirst = newParent;
QGraphicsWidget *newFocusLast = newFocusFirst;
QGraphicsWidget *newFocusAfter = newFocusFirst->d_func()->focusNext;
do {
if (!newParent->isAncestorOf(newFocusAfter))
break;
newFocusLast = newFocusAfter;
} while ((newFocusAfter = newFocusAfter->d_func()->focusNext));
newFocusLast->d_func()->focusNext = q;
focusLast->d_func()->focusNext = newFocusAfter;
newFocusAfter->d_func()->focusPrev = focusLast;
focusPrev = newFocusLast;
} else {
// no new parent, so just link up our own prev->last widgets.
focusPrev = focusLast;
focusLast->d_func()->focusNext = q;
}
}
void QGraphicsWidgetPrivate::updateFont(const QFont &font)
{
Q_Q(QGraphicsWidget);
// Update the local font setting.
this->font = font;
// Calculate new mask.
if (q->isWindow() && !q->testAttribute(Qt::WA_WindowPropagation))
inheritedFontResolveMask = 0;
int mask = font.resolve() | inheritedFontResolveMask;
// Propagate to children.
for (int i = 0; i < children.size(); ++i) {
QGraphicsItem *item = children.at(i);
if (item->isWidget()) {
QGraphicsWidget *w = static_cast<QGraphicsWidget *>(item);
if (!w->isWindow() || w->testAttribute(Qt::WA_WindowPropagation))
w->d_func()->resolveFont(mask);
} else {
item->d_ptr->resolveFont(mask);
}
}
if (!polished)
return;
// Notify change.
QEvent event(QEvent::FontChange);
QApplication::sendEvent(q, &event);
}
void QGraphicsWidgetPrivate::updatePalette(const QPalette &palette)
{
Q_Q(QGraphicsWidget);
// Update local palette setting.
this->palette = palette;
// Calculate new mask.
if (q->isWindow() && !q->testAttribute(Qt::WA_WindowPropagation))
inheritedPaletteResolveMask = 0;
int mask = palette.resolve() | inheritedPaletteResolveMask;
// Propagate to children.
for (int i = 0; i < children.size(); ++i) {
QGraphicsItem *item = children.at(i);
if (item->isWidget()) {
QGraphicsWidget *w = static_cast<QGraphicsWidget *>(item);
if (!w->isWindow() || w->testAttribute(Qt::WA_WindowPropagation))
w->d_func()->resolvePalette(mask);
} else {
item->d_ptr->resolvePalette(mask);
}
}
// Notify change.
QEvent event(QEvent::PaletteChange);
QApplication::sendEvent(q, &event);
}
/*!
\internal
*/
void QGraphicsWidgetPrivate::setFocusWidget()
{
// Update focus child chain.
QGraphicsWidget *widget = static_cast<QGraphicsWidget *>(q_ptr);
QGraphicsWidget *parent = widget;
bool hidden = !visible;
do {
parent->d_func()->focusChild = widget;
} while (!parent->isWindow() && (parent = parent->parentWidget()) && (!hidden || !parent->d_func()->visible));
}
void QGraphicsWidgetPrivate::setLayoutDirection_helper(Qt::LayoutDirection direction)
{
Q_Q(QGraphicsWidget);
if ((direction == Qt::RightToLeft) == (testAttribute(Qt::WA_RightToLeft)))
return;
q->setAttribute(Qt::WA_RightToLeft, (direction == Qt::RightToLeft));
// Propagate this change to all children.
for (int i = 0; i < children.size(); ++i) {
QGraphicsItem *item = children.at(i);
if (item->isWidget()) {
QGraphicsWidget *widget = static_cast<QGraphicsWidget *>(item);
if (widget->parentWidget() && !widget->testAttribute(Qt::WA_SetLayoutDirection))
widget->d_func()->setLayoutDirection_helper(direction);
}
}
// Send the notification event to this widget item.
QEvent e(QEvent::LayoutDirectionChange);
QApplication::sendEvent(q, &e);
}
/**
* is called after a reparent has taken place to fix up the focus chain(s)
*/
void QGraphicsWidgetPrivate::fixFocusChainBeforeReparenting(QGraphicsWidget *newParent, QGraphicsScene *oldScene, QGraphicsScene *newScene)
{
Q_Q(QGraphicsWidget);
Q_ASSERT(focusNext && focusPrev);
QGraphicsWidget *n = q; //last one in 'new' list
QGraphicsWidget *o = 0; //last one in 'old' list
QGraphicsWidget *w = focusNext;
QGraphicsWidget *firstOld = 0;
bool wasPreviousNew = true;
while (w != q) {
bool isCurrentNew = q->isAncestorOf(w);
if (isCurrentNew) {
if (!wasPreviousNew) {
n->d_func()->focusNext = w;
w->d_func()->focusPrev = n;
}
n = w;
} else /*if (!isCurrentNew)*/ {
if (wasPreviousNew) {
if (o) {
o->d_func()->focusNext = w;
w->d_func()->focusPrev = o;
} else {
firstOld = w;
}
}
o = w;
}
w = w->d_func()->focusNext;
wasPreviousNew = isCurrentNew;
}
// repair the 'old' chain
if (firstOld) {
o->d_func()->focusNext = firstOld;
firstOld->d_func()->focusPrev = o;
}
// update tabFocusFirst for oldScene if the item is going to be removed from oldScene
if (newParent)
newScene = newParent->scene();
if (oldScene && newScene != oldScene)
oldScene->d_func()->tabFocusFirst = (firstOld && firstOld->scene() == oldScene) ? firstOld : 0;
QGraphicsItem *topLevelItem = newParent ? newParent->topLevelItem() : 0;
QGraphicsWidget *topLevel = 0;
if (topLevelItem && topLevelItem->isWidget())
topLevel = static_cast<QGraphicsWidget *>(topLevelItem);
if (topLevel && newParent) {
QGraphicsWidget *last = topLevel->d_func()->focusPrev;
// link last with new chain
last->d_func()->focusNext = q;
focusPrev = last;
// link last in chain with
topLevel->d_func()->focusPrev = n;
n->d_func()->focusNext = topLevel;
} else {
// q is the start of the focus chain
n->d_func()->focusNext = q;
focusPrev = n;
}
}
