void QGroupBox::fixFocus()
{
QFocusData * fd = focusData();
QWidget * orig = fd->home();
QWidget * best = 0;
QWidget * candidate = 0;
QWidget * w = orig;
do {
QWidget * p = w;
while( p && p != this && !p->isTopLevel() )
p = p->parentWidget();
if ( p == this && ( w->focusPolicy() & TabFocus ) == TabFocus
&& w->isVisibleTo(this) ) {
if ( w->hasFocus()
#ifndef QT_NO_RADIOBUTTON
|| ( !best && ::qt_cast<QRadioButton*>(w)
&& ((QRadioButton*)w)->isChecked() )
#endif
)
// we prefer a checked radio button or a widget that
// already has focus, if there is one
best = w;
else if ( !candidate )
// but we'll accept anything that takes focus
candidate = w;
}
w = fd->next();
} while( w != orig );
if ( best )
best->setFocus();
else if ( candidate )
candidate->setFocus();
}
void QwtPlot::updateTabOrder()
{
// Depending on the position of the legend the
// tab order will be changed that the canvas is
// next to the last legend item, or directly before
// the first one. The following code seems much too
// complicated but is there a better implementation ?
if ( d_canvas->focusPolicy() == QWidget::NoFocus || focusData() == NULL )
return;
// move the cursor to the canvas
for ( int i = 0; i < focusData()->count(); i++ )
{
if ( focusData()->next() == d_canvas )
break;
}
const bool canvasFirst = d_layout->legendPosition() == QwtPlot::Bottom ||
d_layout->legendPosition() == QwtPlot::Right;
for ( int j = 0; j < focusData()->count(); j++ )
{
QWidget *w = canvasFirst ? focusData()->next() : focusData()->prev();
if ( w->focusPolicy() != QWidget::NoFocus
&& w->parent() && w->parent() == d_legend->contentsWidget() )
{
if ( canvasFirst )
{
do // go back to last non legend item
{
w = focusData()->prev(); // before the first legend item
} while ( w->focusPolicy() == QWidget::NoFocus );
}
if ( w != d_canvas )
setTabOrder(w, d_canvas);
break;
}
}
}
void QWidgetStack::raiseWidget( QWidget *w )
{
if ( !w || w == invisible || w->parent() != this || w == topWidget )
return;
if ( id(w) == -1 )
addWidget( w );
if ( !isVisible() ) {
topWidget = w;
return;
}
if (w->maximumSize().width() < invisible->width()
|| w->maximumSize().height() < invisible->height())
invisible->setBackgroundMode(backgroundMode());
else if (invisible->backgroundMode() != NoBackground)
invisible->setBackgroundMode(NoBackground);
if ( invisible->isHidden() ) {
invisible->setGeometry( contentsRect() );
invisible->lower();
invisible->show();
QApplication::sendPostedEvents( invisible, QEvent::ShowWindowRequest );
}
// try to move focus onto the incoming widget if focus
// was somewhere on the outgoing widget.
if ( topWidget ) {
QWidget * fw = focusWidget();
QWidget* p = fw;
while ( p && p != topWidget )
p = p->parentWidget();
if ( p == topWidget ) { // focus was on old page
if ( !focusWidgets )
focusWidgets = new QPtrDict<QWidget>( 17 );
focusWidgets->replace( topWidget, fw );
fw->clearFocus();
// look for the best focus widget we can find
// best == what we had (which may be deleted)
fw = focusWidgets->take( w );
if ( isChildOf( fw, w ) ) {
fw->setFocus();
} else {
// second best == first child widget in the focus chain
QFocusData *f = focusData();
QWidget* home = f->home();
QWidget *i = home;
do {
if ( ( ( i->focusPolicy() & TabFocus ) == TabFocus )
&& !i->focusProxy() && i->isVisibleTo(w) && i->isEnabled() ) {
p = i;
while ( p && p != w )
p = p->parentWidget();
if ( p == w ) {
i->setFocus();
break;
}
}
i = f->next();
} while( i != home );
}
}
}
if ( isVisible() ) {
emit aboutToShow( w );
int i = id( w );
if ( i != -1 )
emit aboutToShow( i );
}
topWidget = w;
const QObjectList * c = children();
QObjectListIt it( *c );
QObject * o;
while( (o=it.current()) != 0 ) {
++it;
if ( o->isWidgetType() && o != w && o != invisible )
((QWidget *)o)->hide();
}
w->setGeometry( invisible->geometry() );
w->show();
}