// krazy:excludeall=qclasses ////////////////////////////////////////////////////////////////////////////// // oxygenwindowmanager.cpp // pass some window mouse press/release/move event actions to window manager // ------------------- // // Copyright (c) 2010 Hugo Pereira Da Costa // // Largely inspired from BeSpin style // Copyright (C) 2007 Thomas Luebking // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to // deal in the Software without restriction, including without limitation the // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or // sell copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS // IN THE SOFTWARE. ////////////////////////////////////////////////////////////////////////////// #include "oxygenwindowmanager.h" #include "oxygenwindowmanager.moc.cpp" #include "oxygenpropertynames.h" #include "oxygenstyleconfigdata.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef Q_WS_X11 #include #include #endif namespace Oxygen { //_____________________________________________________________ WindowManager::WindowManager( QObject* parent ): QObject( parent ), _enabled( true ), _useWMMoveResize( true ), _dragMode( StyleConfigData::WD_FULL ), _dragDistance( KGlobalSettings::dndEventDelay() ), _dragDelay( QApplication::startDragTime() ), _dragAboutToStart( false ), _dragInProgress( false ), _locked( false ), _cursorOverride( false ) { // install application wise event filter _appEventFilter = new AppEventFilter( this ); qApp->installEventFilter( _appEventFilter ); } //_____________________________________________________________ void WindowManager::initialize( void ) { setEnabled( StyleConfigData::windowDragEnabled() ); setDragMode( StyleConfigData::windowDragMode() ); setUseWMMoveResize( StyleConfigData::useWMMoveResize() ); setDragDistance( KGlobalSettings::dndEventDelay() ); setDragDelay( QApplication::startDragTime() ); initializeWhiteList(); initializeBlackList(); } //_____________________________________________________________ void WindowManager::registerWidget( QWidget* widget ) { if( isBlackListed( widget ) ) { /* also install filter for blacklisted widgets to be able to catch the relevant events and prevent the drag to happen */ widget->removeEventFilter( this ); widget->installEventFilter( this ); } else if( isDragable( widget ) ) { widget->removeEventFilter( this ); widget->installEventFilter( this ); } } //_____________________________________________________________ void WindowManager::unregisterWidget( QWidget* widget ) { if( widget ) { widget->removeEventFilter( this ); } } //_____________________________________________________________ void WindowManager::initializeWhiteList( void ) { _whiteList.clear(); // add user specified whitelisted classnames _whiteList.insert( ExceptionId( "MplayerWindow" ) ); _whiteList.insert( ExceptionId( "ViewSliders@kmix" ) ); _whiteList.insert( ExceptionId( "Sidebar_Widget@konqueror" ) ); foreach( const QString& exception, StyleConfigData::windowDragWhiteList() ) { ExceptionId id( exception ); if( !id.className().isEmpty() ) { _whiteList.insert( exception ); } } } //_____________________________________________________________ void WindowManager::initializeBlackList( void ) { _blackList.clear(); _blackList.insert( ExceptionId( "CustomTrackView@kdenlive" ) ); _blackList.insert( ExceptionId( "MuseScore" ) ); foreach( const QString& exception, StyleConfigData::windowDragBlackList() ) { ExceptionId id( exception ); if( !id.className().isEmpty() ) { _blackList.insert( exception ); } } } //_____________________________________________________________ bool WindowManager::eventFilter( QObject* object, QEvent* event ) { if( !enabled() ) return false; switch ( event->type() ) { case QEvent::MouseButtonPress: return mousePressEvent( object, event ); break; case QEvent::MouseMove: if ( object == _target.data() ) return mouseMoveEvent( object, event ); break; case QEvent::MouseButtonRelease: if ( _target ) return mouseReleaseEvent( object, event ); break; default: break; } return false; } //_____________________________________________________________ void WindowManager::timerEvent( QTimerEvent* event ) { if( event->timerId() == _dragTimer.timerId() ) { _dragTimer.stop(); if( _target ) { startDrag( _target.data(), _globalDragPoint ); } } else { return QObject::timerEvent( event ); } } //_____________________________________________________________ bool WindowManager::mousePressEvent( QObject* object, QEvent* event ) { // cast event and check buttons/modifiers QMouseEvent *mouseEvent = static_cast( event ); if( !( mouseEvent->modifiers() == Qt::NoModifier && mouseEvent->button() == Qt::LeftButton ) ) { return false; } // check lock if( isLocked() ) return false; else setLocked( true ); // cast to widget QWidget *widget = static_cast( object ); // check if widget can be dragged from current position if( isBlackListed( widget ) || !canDrag( widget ) ) return false; // retrieve widget's child at event position QPoint position( mouseEvent->pos() ); QWidget* child = widget->childAt( position ); if( !canDrag( widget, child, position ) ) return false; // save target and drag point _target = widget; _dragPoint = position; _globalDragPoint = mouseEvent->globalPos(); _dragAboutToStart = true; // send a move event to the current child with same position // if received, it is caught to actually start the drag QPoint localPoint( _dragPoint ); if( child ) localPoint = child->mapFrom( widget, localPoint ); else child = widget; QMouseEvent localMouseEvent( QEvent::MouseMove, localPoint, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier ); qApp->sendEvent( child, &localMouseEvent ); // never eat event return false; } //_____________________________________________________________ bool WindowManager::mouseMoveEvent( QObject* object, QEvent* event ) { Q_UNUSED( object ); // stop timer if( _dragTimer.isActive() ) _dragTimer.stop(); // cast event and check drag distance QMouseEvent *mouseEvent = static_cast( event ); if( !_dragInProgress ) { if( _dragAboutToStart ) { if( mouseEvent->globalPos() == _globalDragPoint ) { // start timer, _dragAboutToStart = false; if( _dragTimer.isActive() ) _dragTimer.stop(); _dragTimer.start( _dragDelay, this ); } else resetDrag(); } else if( QPoint( mouseEvent->globalPos() - _globalDragPoint ).manhattanLength() >= _dragDistance ) { _dragTimer.start( 0, this ); } return true; } else if( !useWMMoveResize() ) { // use QWidget::move for the grabbing /* this works only if the sending object and the target are identical */ QWidget* window( _target.data()->window() ); window->move( window->pos() + mouseEvent->pos() - _dragPoint ); return true; } else return false; } //_____________________________________________________________ bool WindowManager::mouseReleaseEvent( QObject* object, QEvent* event ) { Q_UNUSED( object ); Q_UNUSED( event ); resetDrag(); return false; } //_____________________________________________________________ bool WindowManager::isDragable( QWidget* widget ) { // check widget if( !widget ) return false; // all accepted default types if( ( qobject_cast( widget ) && widget->isWindow() ) || ( qobject_cast( widget ) && widget->isWindow() ) || qobject_cast( widget ) || qobject_cast( widget ) || qobject_cast( widget ) || qobject_cast( widget ) || qobject_cast( widget ) ) { return true; } if( widget->inherits( "KScreenSaver" ) && widget->inherits( "KCModule" ) ) { return true; } if( isWhiteListed( widget ) ) { return true; } // flat toolbuttons if( QToolButton* toolButton = qobject_cast( widget ) ) { if( toolButton->autoRaise() ) return true; } // viewports /* one needs to check that 1/ the widget parent is a scrollarea 2/ it matches its parent viewport 3/ the parent is not blacklisted */ if( QListView* listView = qobject_cast( widget->parentWidget() ) ) { if( listView->viewport() == widget && !isBlackListed( listView ) ) return true; } if( QTreeView* treeView = qobject_cast( widget->parentWidget() ) ) { if( treeView->viewport() == widget && !isBlackListed( treeView ) ) return true; } if( QGraphicsView* graphicsView = qobject_cast( widget->parentWidget() ) ) { if( graphicsView->viewport() == widget && !isBlackListed( graphicsView ) ) return true; } /* catch labels in status bars. this is because of kstatusbar who captures buttonPress/release events */ if( QLabel* label = qobject_cast( widget ) ) { if( label->textInteractionFlags().testFlag( Qt::TextSelectableByMouse ) ) return false; QWidget* parent = label->parentWidget(); while( parent ) { if( qobject_cast( parent ) ) return true; parent = parent->parentWidget(); } } return false; } //_____________________________________________________________ bool WindowManager::isBlackListed( QWidget* widget ) { // check against noAnimations propery QVariant propertyValue( widget->property( PropertyNames::noWindowGrab ) ); if( propertyValue.isValid() && propertyValue.toBool() ) return true; // list-based blacklisted widgets QString appName( qApp->applicationName() ); foreach( const ExceptionId& id, _blackList ) { if( !id.appName().isEmpty() && id.appName() != appName ) continue; if( id.className() == "*" && !id.appName().isEmpty() ) { // if application name matches and all classes are selected // disable the grabbing entirely setEnabled( false ); return true; } if( widget->inherits( id.className().toLatin1() ) ) return true; } return false; } //_____________________________________________________________ bool WindowManager::isWhiteListed( QWidget* widget ) const { QString appName( qApp->applicationName() ); foreach( const ExceptionId& id, _whiteList ) { if( !id.appName().isEmpty() && id.appName() != appName ) continue; if( widget->inherits( id.className().toLatin1() ) ) return true; } return false; } //_____________________________________________________________ bool WindowManager::canDrag( QWidget* widget ) { // check if enabled if( !enabled() ) return false; // assume isDragable widget is already passed // check some special cases where drag should not be effective // check mouse grabber if( QWidget::mouseGrabber() ) return false; /* check cursor shape. Assume that a changed cursor means that some action is in progress and should prevent the drag */ if( widget->cursor().shape() != Qt::ArrowCursor ) return false; // accept return true; } //_____________________________________________________________ bool WindowManager::canDrag( QWidget* widget, QWidget* child, const QPoint& position ) { // retrieve child at given position and check cursor again if( child && child->cursor().shape() != Qt::ArrowCursor ) return false; /* check against children from which drag should never be enabled, even if mousePress/Move has been passed to the parent */ if( child && ( qobject_cast(child ) || qobject_cast( child ) ) ) { return false; } // tool buttons if( QToolButton* toolButton = qobject_cast( widget ) ) { if( dragMode() == StyleConfigData::WD_MINIMAL && !qobject_cast(widget->parentWidget() ) ) return false; return toolButton->autoRaise() && !toolButton->isEnabled(); } // check menubar if( QMenuBar* menuBar = qobject_cast( widget ) ) { // check if there is an active action if( menuBar->activeAction() && menuBar->activeAction()->isEnabled() ) return false; // check if action at position exists and is enabled if( QAction* action = menuBar->actionAt( position ) ) { if( action->isSeparator() ) return true; if( action->isEnabled() ) return false; } // return true in all other cases return true; } /* in MINIMAL mode, anything that has not been already accepted and does not come from a toolbar is rejected */ if( dragMode() == StyleConfigData::WD_MINIMAL ) { if( qobject_cast( widget ) ) return true; else return false; } /* following checks are relevant only for WD_FULL mode */ // tabbar. Make sure no tab is under the cursor if( QTabBar* tabBar = qobject_cast( widget ) ) { return tabBar->tabAt( position ) == -1; } /* check groupboxes prevent drag if unchecking grouboxes */ if( QGroupBox *groupBox = qobject_cast( widget ) ) { // non checkable group boxes are always ok if( !groupBox->isCheckable() ) return true; // gather options to retrieve checkbox subcontrol rect QStyleOptionGroupBox opt; opt.initFrom( groupBox ); if( groupBox->isFlat() ) opt.features |= QStyleOptionFrameV2::Flat; opt.lineWidth = 1; opt.midLineWidth = 0; opt.text = groupBox->title(); opt.textAlignment = groupBox->alignment(); opt.subControls = (QStyle::SC_GroupBoxFrame | QStyle::SC_GroupBoxCheckBox); if (!groupBox->title().isEmpty()) opt.subControls |= QStyle::SC_GroupBoxLabel; opt.state |= (groupBox->isChecked() ? QStyle::State_On : QStyle::State_Off); // check against groupbox checkbox if( groupBox->style()->subControlRect(QStyle::CC_GroupBox, &opt, QStyle::SC_GroupBoxCheckBox, groupBox ).contains( position ) ) { return false; } // check against groupbox label if( !groupBox->title().isEmpty() && groupBox->style()->subControlRect(QStyle::CC_GroupBox, &opt, QStyle::SC_GroupBoxLabel, groupBox ).contains( position ) ) { return false; } return true; } // labels if( QLabel* label = qobject_cast( widget ) ) { if( label->textInteractionFlags().testFlag( Qt::TextSelectableByMouse ) ) return false; } // abstract item views QAbstractItemView* itemView( NULL ); if( ( itemView = qobject_cast( widget->parentWidget() ) ) || ( itemView = qobject_cast( widget->parentWidget() ) ) ) { if( widget == itemView->viewport() ) { // QListView if( itemView->frameShape() != QFrame::NoFrame ) return false; else if( itemView->selectionMode() != QAbstractItemView::NoSelection && itemView->selectionMode() != QAbstractItemView::SingleSelection && itemView->model() && itemView->model()->rowCount() ) return false; else if( itemView->model() && itemView->indexAt( position ).isValid() ) return false; } } else if( ( itemView = qobject_cast( widget->parentWidget() ) ) ) { if( widget == itemView->viewport() ) { // QAbstractItemView if( itemView->frameShape() != QFrame::NoFrame ) return false; else if( itemView->indexAt( position ).isValid() ) return false; } } else if( QGraphicsView* graphicsView = qobject_cast( widget->parentWidget() ) ) { if( widget == graphicsView->viewport() ) { // QGraphicsView if( graphicsView->frameShape() != QFrame::NoFrame ) return false; else if( graphicsView->dragMode() != QGraphicsView::NoDrag ) return false; else if( graphicsView->itemAt( position ) ) return false; } } return true; } //____________________________________________________________ void WindowManager::resetDrag( void ) { if( (!useWMMoveResize() ) && _target && _cursorOverride ) { qApp->restoreOverrideCursor(); _cursorOverride = false; } _target.clear(); if( _dragTimer.isActive() ) _dragTimer.stop(); _dragPoint = QPoint(); _globalDragPoint = QPoint(); _dragAboutToStart = false; _dragInProgress = false; } //____________________________________________________________ void WindowManager::startDrag( QWidget* widget, const QPoint& position ) { if( !( enabled() && widget ) ) return; if( QWidget::mouseGrabber() ) return; // ungrab pointer if( useWMMoveResize() ) { #ifdef Q_WS_X11 XUngrabPointer(QX11Info::display(), QX11Info::appTime()); NETRootInfo rootInfo(QX11Info::display(), NET::WMMoveResize); rootInfo.moveResizeRequest( widget->window()->winId(), position.x(), position.y(), NET::Move); #endif } if( !useWMMoveResize() ) { if( !_cursorOverride ) { qApp->setOverrideCursor( Qt::SizeAllCursor ); _cursorOverride = true; } } _dragInProgress = true; return; } //____________________________________________________________ bool WindowManager::supportWMMoveResize( void ) const { #ifdef Q_WS_X11 return true; #endif return false; } //____________________________________________________________ bool WindowManager::AppEventFilter::eventFilter( QObject* object, QEvent* event ) { if( event->type() == QEvent::MouseButtonRelease ) { // stop drag timer if( _parent->_dragTimer.isActive() ) { _parent->resetDrag(); } // unlock if( _parent->isLocked() ) { _parent->setLocked( false ); } } if( !_parent->enabled() ) return false; /* if a drag is in progress, the widget will not receive any event we trigger on the first MouseMove or MousePress events that are received by any widget in the application to detect that the drag is finished */ if( _parent->useWMMoveResize() && _parent->_dragInProgress && _parent->_target && ( event->type() == QEvent::MouseMove || event->type() == QEvent::MouseButtonPress ) ) { return appMouseEvent( object, event ); } return false; } //_____________________________________________________________ bool WindowManager::AppEventFilter::appMouseEvent( QObject* object, QEvent* event ) { Q_UNUSED( object ); // store target window (see later) QWidget* window( _parent->_target.data()->window() ); /* post some mouseRelease event to the target, in order to counter balance the mouse press that triggered the drag. Note that it triggers a resetDrag */ QMouseEvent mouseEvent( QEvent::MouseButtonRelease, _parent->_dragPoint, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier ); qApp->sendEvent( _parent->_target.data(), &mouseEvent ); if( event->type() == QEvent::MouseMove ) { /* HACK: quickly move the main cursor out of the window and back this is needed to get the focus right for the window children the origin of this issue is unknown at the moment */ const QPoint cursor = QCursor::pos(); QCursor::setPos(window->mapToGlobal( window->rect().topRight() ) + QPoint(1, 0) ); QCursor::setPos(cursor); } return true; } }