void KoCursorPrivate::setAutoHideCursor( QWidget *w, bool enable, bool customEventFilter )
{
if ( !w || !enabled )
return;
QWidget* viewport = 0;
QAbstractScrollArea * sv = qobject_cast<QAbstractScrollArea *>( w );
if ( sv )
viewport = sv->viewport();
if ( enable )
{
if ( m_eventFilters.contains( w ) )
return;
KoCursorPrivateAutoHideEventFilter* filter = new KoCursorPrivateAutoHideEventFilter( w );
m_eventFilters.insert( w, filter );
if (viewport) {
m_eventFilters.insert( viewport, filter );
connect(viewport, SIGNAL(destroyed(QObject*)), this, SLOT(slotViewportDestroyed(QObject*)));
}
if ( !customEventFilter ) {
w->installEventFilter( filter ); // for key events
if (viewport)
viewport->installEventFilter( filter ); // for mouse events
}
connect( w, SIGNAL(destroyed(QObject*)),
this, SLOT(slotWidgetDestroyed(QObject*)) );
}
else
{
void ItemDelegate::setIndexWidget(const QModelIndex &index, ItemWidget *w)
{
reset(&m_cache[index.row()], w);
if (w == NULL)
return;
QWidget *ww = w->widget();
if (!m_antialiasing) {
QFont f = ww->font();
f.setStyleStrategy(QFont::NoAntialias);
ww->setFont(f);
foreach (QWidget *child, ww->findChildren<QWidget *>("item_child"))
child->setFont(f);
}
// Try to get proper size by showing item momentarily.
ww->show();
w->updateSize(m_maxSize, m_idealWidth);
ww->hide();
ww->installEventFilter(this);
w->setCurrent(m_view->currentIndex() == index);
emit rowSizeChanged();
}
HistoryCompleter::HistoryCompleter(QObject *parent)
: QCompleter(parent)
, d_ptr(new HistoryCompleterPrivate(this))
{
// make an assumption to allow pressing of the down
// key, before the first model run:
// parent is likely the lineedit
QWidget *p = qobject_cast<QWidget *>(parent);
if (p) {
p->installEventFilter(d_ptr->model);
QString objectName = p->objectName();
if (objectName.isEmpty())
return;
d_ptr->model->list = d_ptr->model->settings->value(objectName).toStringList();
}
QLineEdit *l = qobject_cast<QLineEdit *>(parent);
if (l && d_ptr->model->list.count())
l->setText(d_ptr->model->list.at(0));
setModel(d_ptr->model);
HistoryLineDelegate *delegate = new HistoryLineDelegate;
HistoryLineView *view = new HistoryLineView(d_ptr, delegate->pixmap.width());
setPopup(view);
view->setItemDelegate(delegate);
}
QWidget * EventFilterDelegate::createEditor ( QWidget * parent, const QStyleOptionViewItem & option, const QModelIndex & index ) const
{
QWidget* out = QItemDelegate::createEditor(parent,option,index);
if(filter)
out->installEventFilter(filter);
return out;
};
void QWSEmbedWidgetPrivate::updateWindow()
{
Q_Q(QWSEmbedWidget);
QWidget *win = q->window();
if (win == window)
return;
if (window) {
window->removeEventFilter(q);
QWSEmbedCommand command;
command.setData(windowId, embeddedId, QWSEmbedEvent::StopEmbed);
QWSDisplay::instance()->d->sendCommand(command);
}
window = win;
if (!window)
return;
windowId = window->winId();
QWSEmbedCommand command;
command.setData(windowId, embeddedId, QWSEmbedEvent::StartEmbed);
QWSDisplay::instance()->d->sendCommand(command);
window->installEventFilter(q);
q->installEventFilter(q);
}
void VPropertyFormWidget::buildEditor(VProperty* property, QFormLayout* formLayout, Property type)
{
// Add property (no child properties)
// Create the editor (if it doesn't work, create empty widget)
QWidget* tmpEditor = property->createEditor(this, QStyleOptionViewItem(), nullptr);
if (!tmpEditor)
{
tmpEditor = new QWidget(this);
}
// set tooltip and whats this
tmpEditor->setToolTip(property->getDescription());
tmpEditor->setWhatsThis(property->getDescription());
// Install event filter
tmpEditor->installEventFilter(this);
// Set the editor data
property->setEditorData(tmpEditor);
// add new row
if (type == Property::Complex)
{
QString name = "<b>"+property->getName()+"</b>";
formLayout->addRow(name, tmpEditor);
}
else
{
formLayout->addRow(property->getName(), tmpEditor);
}
d_ptr->EditorWidgets.append(VPropertyFormWidgetPrivate::SEditorWidget(tmpEditor));
}
/*! create editor for tree widget item
*/
QWidget *
CQPropertyDelegate::
createEditor(QWidget *parent, const QStyleOptionViewItem &, const QModelIndex &index) const
{
QTreeWidgetItem *item = getModelItem(index);
assert(item);
CQPropertyDelegate *th = const_cast<CQPropertyDelegate *>(this);
QWidget *w = 0;
if (CQPropertyItem::isType(item->type())) {
CQPropertyItem *item1 = dynamic_cast<CQPropertyItem *>(item);
assert(item1);
if (index.column() == 1)
w = item1->createEditor(parent);
}
else
assert(false);
if (w) {
w->updateGeometry();
if (w->layout())
w->layout()->invalidate();
//w->setFixedSize(sizeHint(option, index));
w->installEventFilter(th);
}
return w;
}
MainWindow::MainWindow(QWidget *parent): QMainWindow(parent),
_positionShift(QPoint(0,0)),
_toolBar(new QToolBar(this)),
_iconLable(new QLabel(this))
{
setObjectName("MainWindow");
setWindowFlags(Qt::FramelessWindowHint);
setContextMenuPolicy(Qt::NoContextMenu);
setMouseTracking(true);
QMainWindow::addToolBar(Qt::TopToolBarArea, _toolBar);
_toolBar->setObjectName("MenuToolBar");
_toolBar->setMovable(false);
_toolBar->setContextMenuPolicy(Qt::NoContextMenu);
QWidget *spacerWidget = new QWidget(_toolBar);
spacerWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
_toolBar->addWidget(_iconLable);
_spacerAction = _toolBar->addWidget(spacerWidget);
_toolBar->installEventFilter(this);
spacerWidget->installEventFilter(this);
//TODO: Зафигачить механизм загрузки всего стиля от css до иконок основных кнопочек (крестик закрытия)
QAction *closeAction = _toolBar->addAction(QIcon(":/icons/cross_grey.png"), QString::null);
// setIcon(QIcon(":/icons/cross_grey.png"));
loadStyleSheet(":/css/dark_theme.css");
resize(700, 500);
connect(closeAction, SIGNAL(triggered()), this, SLOT(close()));
}
MonthView::MonthView(QWidget *parent, const QCategoryFilter& c, QSet<QPimSource> set)
: QCalendarWidget(parent)
{
setObjectName("monthview");
setVerticalHeaderFormat(NoVerticalHeader);
setFirstDayOfWeek( Qtopia::weekStartsOnMonday() ? Qt::Monday : Qt::Sunday );
QDate start = QDate::currentDate();
start.setYMD(start.year(), start.month(), 1);
QDate end = start.addDays(start.daysInMonth() - 1);
model = new QOccurrenceModel(QDateTime(start, QTime(0, 0, 0)), QDateTime(end.addDays(1), QTime(0, 0)), this);
if (set.count() > 0)
model->setVisibleSources(set);
model->setCategoryFilter(c);
connect(model, SIGNAL(modelReset()), this, SLOT(resetFormatsSoon()));
connect(this, SIGNAL(currentPageChanged(int,int)), this, SLOT(updateModelRange(int,int)));
// Since we don't know if we'll get a model reset from the model
// at startup, force a timer
dirtyTimer = new QTimer();
dirtyTimer->setSingleShot(true);
dirtyTimer->setInterval(0);
connect(dirtyTimer, SIGNAL(timeout()), this, SLOT(resetFormats()));
resetFormatsSoon();
// XXX find the QCalendarView class so we can handle Key_Back properly :/
// [this comes from qtopiaapplication.cpp]
QWidget *table = findChild<QWidget*>("qt_calendar_calendarview");
if (table)
table->installEventFilter(this);
}
void TransparentTop::transparentChanged()
{
#ifdef WIN32
if (bCanTransparent){
QWidget *p = static_cast<QWidget*>(parent());
if (*useTransparent){
if (!m_bUseTransparent){
SetWindowLongW(p->winId(), GWL_EXSTYLE, GetWindowLongW(p->winId(), GWL_EXSTYLE) | WS_EX_LAYERED);
SetLayeredWindowAttributes(p->winId(), p->colorGroup().background().rgb(), 255, LWA_ALPHA);
if (p->isVisible())
RedrawWindow(p->winId(), NULL, NULL, RDW_UPDATENOW);
p->installEventFilter(this);
m_bUseTransparent = true;
}
}else{
if (m_bUseTransparent){
SetWindowLongW(p->winId(), GWL_EXSTYLE, GetWindowLongW(p->winId(), GWL_EXSTYLE) & ~WS_EX_LAYERED);
p->removeEventFilter(this);
m_bUseTransparent = false;
}
}
}
#endif
setTransparent();
}
void TransparentPlugin::setState()
{
QWidget *main = getMainWindow();
if (main == NULL)
return;
#ifdef WIN32
if (timer == NULL){
timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(tick()));
main->installEventFilter(this);
SetWindowLongW(main->winId(), GWL_EXSTYLE, GetWindowLongW(main->winId(), GWL_EXSTYLE) | WS_EX_LAYERED);
SetLayeredWindowAttributes(main->winId(), main->colorGroup().background().rgb(), 0, LWA_ALPHA);
RedrawWindow(main->winId(), NULL, NULL, RDW_UPDATENOW);
main->setMouseTracking(true);
m_bActive = main->isActiveWindow();
m_bState = !m_bActive;
}
bool bNewState = m_bActive || m_bHaveMouse;
if (bNewState == m_bState){
BYTE d = (BYTE)(bNewState ? 255 : QMIN((100 - getTransparency()) * 256 / 100, 255));
SetLayeredWindowAttributes(main->winId(), main->colorGroup().background().rgb(), d, LWA_ALPHA);
return;
}
m_bState = bNewState;
startTime = GetTickCount();
timer->start(10);
#else
if (!top) {
top = new TransparentTop(main, getTransparency());
connect(top,SIGNAL(destroyed()),this,SLOT(topDestroyed()));
}
top->setTransparent(getTransparency());
#endif
}
void QWhatsThis::add( QWidget * widget, const QPixmap & icon,
const char * title, const char * text,
bool deepCopy )
{
QWhatsThisPrivate::setUpWhatsThis();
QWhatsThisPrivate::Item * i = wt->dict->find( (void *)widget );
if ( i )
remove( widget );
i = new QWhatsThisPrivate::Item;
i->dc = deepCopy;
if ( deepCopy ) {
i->s = new char[ qstrlen(text) + 1 ];
qstrcpy( i->s, text );
if ( title ) {
i->t = new char[ qstrlen(text) + 1 ];
qstrcpy( i->t, text );
}
} else {
i->s = (char*)text;
i->t = (char*)title;
}
i->pm = icon;
wt->dict->insert( (void *)widget, i );
QWidget * tlw = widget->topLevelWidget();
if ( !wt->tlw->find( (void *)tlw ) ) {
wt->tlw->insert( (void *)tlw, tlw );
tlw->installEventFilter( wt );
}
}
void ToolBar::actionEvent(QActionEvent *event)
{
QToolBar::actionEvent(event);
if (event->type() == QEvent::ActionAdded)
if (event->action()) {
QWidget *widget = widgetForAction(event->action());
if (widget)
widget->installEventFilter(this);
}
}
inline void flipEventFilters(QAbstractItemDelegate *oldDelegate,
QAbstractItemDelegate *newDelegate)
{
for (QList<WidgetMapper>::const_iterator it = widgetMap.cbegin(), end = widgetMap.cend(); it != end; ++it) {
QWidget *w = it->widget;
if (!w)
continue;
w->removeEventFilter(oldDelegate);
w->installEventFilter(newDelegate);
}
}
inline void flipEventFilters(QAbstractItemDelegate *oldDelegate,
QAbstractItemDelegate *newDelegate)
{
for (int i = 0; i < widgetMap.count(); ++i) {
QWidget *w = widgetMap.at(i).widget;
if (!w)
continue;
w->removeEventFilter(oldDelegate);
w->installEventFilter(newDelegate);
}
}
QtWebDirectory::QtWebDirectory(QWidget * parent)
: QtBrowser(parent) {
QWidget * widget = (QWidget *) getWidget();
CloseEventFilter * closeEventFilter = new CloseEventFilter(this, SLOT(CloseEventFilterSlot()));
widget->installEventFilter(closeEventFilter);
widget->resize(715, 569);
LANGUAGE_CHANGE(widget);
init();
}
void AutoHideWidget::installFiliter(QObject *o){
QObjectList children = o->children();
for(int n=0;n < children.count();n++){
if(children[n]->isWidgetType()){
qDebug()<<"AutoHideWidget::installFilter:child name:"<<children[n]->objectName();
QWidget *w = static_cast<QWidget*>(children[n]);
w->setMouseTracking(true);
w->installEventFilter(this);
installFiliter(children[n]);
}
}
}
int ExtendedTabWidget::addSubWindow(EditorInterface* window)
{
QWidget *widget = window->widget();
Q_ASSERT(widget != 0);
int curr = currentIndex();
int index = QTabWidget::insertTab(curr + 1, widget, window->icon(), tabTextFor(widget));
widget->installEventFilter(this);
widget->setAttribute(Qt::WA_DeleteOnClose, true);
setCurrentWidget(widget);
tabsUpdate();
return index;
}
void Configuration::findApplication(const QString &query)
{
for (int i = (m_findApplicationUi.resultsLayout->count() - 1); i >= 0; --i)
{
m_findApplicationUi.resultsLayout->takeAt(i)->widget()->deleteLater();
m_findApplicationUi.resultsLayout->removeItem(m_findApplicationUi.resultsLayout->itemAt(i));
}
if (query.length() < 3)
{
m_findApplicationDialog->adjustSize();
return;
}
KService::List services = KServiceTypeTrader::self()->query("Application", QString("exist Exec and ( (exist Keywords and '%1' ~subin Keywords) or (exist GenericName and '%1' ~~ GenericName) or (exist Name and '%1' ~~ Name) )").arg(query));
if (!services.isEmpty())
{
foreach (const KService::Ptr &service, services)
{
if (!service->noDisplay() && service->property("NotShowIn", QVariant::String) != "KDE")
{
Launcher* launcher = new Launcher(KUrl(service->entryPath()), m_applet);
QWidget* entryWidget = new QWidget(static_cast<QWidget*>(parent()));
QLabel* iconLabel = new QLabel(entryWidget);
QLabel* textLabel = new QLabel(QString("%1<br /><small>%3</small>").arg(launcher->title()).arg(launcher->description()), entryWidget);
iconLabel->setPixmap(launcher->icon().pixmap(32, 32));
textLabel->setFixedSize(240, 40);
QHBoxLayout* entryWidgetLayout = new QHBoxLayout(entryWidget);
entryWidgetLayout->addWidget(iconLabel);
entryWidgetLayout->addWidget(textLabel);
entryWidgetLayout->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
entryWidget->setToolTip(QString("<b>%1</b><br /><i>%2</i>").arg(launcher->title()).arg(launcher->description()));
entryWidget->setLayout(entryWidgetLayout);
entryWidget->setFixedSize(300, 40);
entryWidget->setObjectName(service->entryPath());
entryWidget->installEventFilter(this);
entryWidget->setCursor(QCursor(Qt::PointingHandCursor));
m_findApplicationUi.resultsLayout->addWidget(entryWidget);
delete launcher;
}
}
}
void AMWindowPaneModel::onRowsInserted(const QModelIndex &parent, int first, int last) {
// for each item inserted: install event filter on the widget, and add to the widget lookup hash.
for(int row=first; row<=last; row++) {
QModelIndex i = index(row, 0, parent);
if(!isAlias(i)) {
QWidget* widget = internalPane(i);
if(widget) {
widget2item_.insert(widget, itemFromIndex(i));
widget->installEventFilter(this);
}
}
}
}
void DockPlugin::init()
{
if (dock)
return;
QWidget *main = getMainWindow();
if (main == NULL)
return;
main->installEventFilter(this);
dock = new DockWnd(this, "inactive", I18N_NOOP("Inactive"));
connect(dock, SIGNAL(showPopup(QPoint)), this, SLOT(showPopup(QPoint)));
connect(dock, SIGNAL(toggleWin()), this, SLOT(toggleWin()));
connect(dock, SIGNAL(doubleClicked()), this, SLOT(doubleClicked()));
bQuit = false;
}
/*!
\brief En/disable the panner
When enabled is true an event filter is installed for
the observed widget, otherwise the event filter is removed.
\param on true or false
\sa isEnabled(), eventFilter()
*/
void QwtPanner::setEnabled(bool on)
{
if ( d_data->isEnabled != on ) {
d_data->isEnabled = on;
QWidget *w = parentWidget();
if ( w ) {
if ( d_data->isEnabled ) {
w->installEventFilter(this);
} else {
w->removeEventFilter(this);
hide();
}
}
}
}
/*!
\brief En/disable the rescaler
When enabled is true an event filter is installed for
the canvas, otherwise the event filter is removed.
\param on true or false
\sa isEnabled(), eventFilter()
*/
void QwtPlotRescaler::setEnabled( bool on )
{
if ( d_data->isEnabled != on )
{
d_data->isEnabled = on;
QWidget *w = canvas();
if ( w )
{
if ( d_data->isEnabled )
w->installEventFilter( this );
else
w->removeEventFilter( this );
}
}
}
void KRandrPassivePopup::startWatchingWidget( QWidget* widget_P )
{
static Atom wm_state = XInternAtom( QX11Info::display() , "WM_STATE", False );
Window win = widget_P->winId();
bool x11_events = false;
for(;;)
{
Window root, parent;
Window* children;
unsigned int nchildren;
XQueryTree( QX11Info::display(), win, &root, &parent, &children, &nchildren );
if( children != NULL )
XFree( children );
if( win == root ) // huh?
break;
win = parent;
QWidget* widget = QWidget::find( win );
if( widget != NULL )
{
widget->installEventFilter( this );
watched_widgets.append( widget );
}
else
{
XWindowAttributes attrs;
XGetWindowAttributes( QX11Info::display(), win, &attrs );
XSelectInput( QX11Info::display(), win, attrs.your_event_mask | StructureNotifyMask );
watched_windows.append( win );
x11_events = true;
}
Atom type;
int format;
unsigned long nitems, after;
unsigned char* data;
if( XGetWindowProperty( QX11Info::display(), win, wm_state, 0, 0, False, AnyPropertyType,
&type, &format, &nitems, &after, &data ) == Success )
{
if( data != NULL )
XFree( data );
if( type != None ) // toplevel window
break;
}
}
if( x11_events )
kapp->installX11EventFilter( this );
}
bool QAquaFocusWidget::eventFilter(QObject * o, QEvent * e)
{
if((e->type() == QEvent::ChildInserted || e->type() == QEvent::ChildRemoved) &&
((QChildEvent*)e)->child() == this) {
if(e->type() == QEvent::ChildRemoved)
o->removeEventFilter(this); //once we're removed, stop listening
return TRUE; //block child events
} else if(o == d) {
switch (e->type()) {
case QEvent::PaletteChange:
setPalette(d->palette());
break;
case QEvent::Hide:
hide();
break;
case QEvent::Show:
show();
break;
case QEvent::Move: {
QPoint p(d->mapTo(parentWidget(), QPoint(0, 0)));
move(p.x() - focusOutset(), p.y() - focusOutset());
break;
}
case QEvent::Resize: {
QResizeEvent *re = (QResizeEvent*)e;
resize(re->size().width() + (focusOutset() * 2),
re->size().height() + (focusOutset() * 2));
setMask(QRegion(rect()) - focusRegion());
break;
}
case QEvent::Reparent: {
QWidget *newp = FOCUS_WIDGET_PARENT(d);
QPoint p(d->mapTo(newp, QPoint(0, 0)));
newp->installEventFilter(this);
reparent(newp, p);
raise();
break; }
default:
break;
}
} else if (QComboBox *combo = ::qt_cast<QComboBox *>(d)) {
if (combo->lineEdit() == o && e->type() == QEvent::FocusOut)
QApplication::sendEvent(combo, e);
}
return FALSE;
}
void KFollowWindow::listenEvent( KWidget *w, ListenFlags flags )
{
Q_D(KFollowWindow);
if(w == NULL)
return;
if(flags.testFlag(targetVisible))
{
QObject::connect(w, SIGNAL(visibleChanged()), this, SLOT(on_visibleChanged()), Qt::QueuedConnection);
}
else
{
QObject::disconnect(w, SIGNAL(visibleChanged()), this, SLOT(on_visibleChanged()));
}
if(flags.testFlag(targetWindowEvent))
{
QWidget *viewport = w->viewport();
viewport->installEventFilter(this);
}
else
{
QWidget *viewport = w->viewport();
viewport->removeEventFilter(this);
}
if(flags.testFlag(targetEvent))
{
w->installEventFilter(this);
}
else
{
w->removeEventFilter(this);
}
if(flags.testFlag(targetScenePosition))
{
w->setFlag(QGraphicsItem::ItemSendsScenePositionChanges);
QObject::connect(w, SIGNAL(scenePosition(QPointF)), this, SLOT(on_scenePosition(QPointF)), Qt::QueuedConnection);
}
else
{
w->setFlag(QGraphicsItem::ItemSendsScenePositionChanges, false);
QObject::disconnect(w, SIGNAL(scenePosition(QPointF)), this, SLOT(on_scenePosition(QPointF)));
}
}
QWidget *PropertyEditorDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &, const QModelIndex &index) const
{
if(index.column() != 1)
return 0;
Property *prop = properties[index.data(Qt::UserRole).toInt()];
PropertyManager *manager = prop->getManager();
if(!manager) return 0;
QWidget *editor = manager->createEditor(prop->getName(), prop->getValue(), parent);
if(editor)
{
editor->setAutoFillBackground(true);
editor->installEventFilter(const_cast<PropertyEditorDelegate *>(this));
}
return editor;
}
void Spinner::updateAncestors()
{
foreach (QWidget *w, m_ancestors)
w->removeEventFilter(this);
m_ancestors.clear();
if (m_context == Overlay) {
QWidget *w = this;
while ((w = w->parentWidget())) {
m_ancestors << w;
w->installEventFilter(this);
connect(w, &QObject::destroyed, this, &Spinner::updateAncestors);
}
updateGeometry();
}
}
QWidget *MTable::createBoxEditor( int row, int col ) const
{
QWidget *e = 0;
if ( col == 0 && ctype == ComboBox){
e = new QComboBox( true, viewport(), "qt_editor_cb" );
//e = new QComboBox( true, viewport(), "e" );
( ( QComboBox*)e )->setEditable( false );
( ( QComboBox*)e )->setDuplicatesEnabled ( false );
QString strNoMed = "VACUUM";
( ( QComboBox*)e )->insertItem( strNoMed );
QString str;
for ( uint i = 0; i < itemList.size(); i++) {
str = itemList[i].c_str();
( ( QComboBox*)e )->insertItem( str );
}
// only for non-editable combo boxes
QString cellText = text( row, col );
if ( !cellText.isEmpty() ){
//Match of cellText with one combo box item resets current item
( ( QComboBox*)e )->setCurrentText( cellText );
//this applies if no match
if ( ( ( QComboBox*)e )->currentItem() == 0 )
( ( QComboBox*)e )->insertItem( strNoMed, 0 );
}
// only for editable combo boxes
//( ( QComboBox*)e )->setEditText( text( row, col ) );
//( ( QComboBox*)e )->lineEdit()->setText( text( row, col ) );
} else {
//e = new QLineEdit( viewport() );
e = new QLineEdit( viewport(), "qt_lineeditor" );
if (validate)
((QLineEdit*)e)->setValidator(new QDoubleValidator(e));
( (QLineEdit*)e )->setFrame( FALSE );
( (QLineEdit*)e )->setText( text( row, col ) );
}
e->installEventFilter( this );
return e;
}
/*!
\brief En/disable the picker
When enabled is true an event filter is installed for
the observed widget, otherwise the event filter is removed.
\param enabled true or false
\sa isEnabled(), eventFilter()
*/
void QwtPicker::setEnabled(bool enabled)
{
if ( d_data->enabled != enabled )
{
d_data->enabled = enabled;
QWidget *w = parentWidget();
if ( w )
{
if ( enabled )
w->installEventFilter(this);
else
w->removeEventFilter(this);
}
updateDisplay();
}
}
