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354 lines
10 KiB
C++
354 lines
10 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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// oxygensplitterproxy.cpp
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// Extended hit area for Splitters
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// -------------------
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//
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// Copyright (C) 2011 Hugo Pereira Da Costa <hugo.pereira@free.fr>
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//
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// Based on Bespin splitterproxy code
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// Copyright (C) 2011 Thomas Luebking <thomas.luebking@web.de>
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//
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License version 2 as published by the Free Software Foundation.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public License
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// along with this library; see the file COPYING.LIB. If not, write to
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// the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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// Boston, MA 02110-1301, USA.
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//////////////////////////////////////////////////////////////////////////////
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#include "oxygensplitterproxy.h"
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#include "oxygenstyleconfigdata.h"
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#include "oxygenmetrics.h"
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#include <QtCore/QCoreApplication>
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#include <QtCore/QDebug>
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#include <QtGui/QPainter>
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namespace Oxygen
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{
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//____________________________________________________________________
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void SplitterFactory::setEnabled( bool value )
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{
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if( _enabled != value )
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{
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// store
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_enabled = value;
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// assign to existing splitters
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for( WidgetMap::iterator iter = _widgets.begin(); iter != _widgets.end(); ++iter )
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{ if( iter.value() ) iter.value().data()->setEnabled( value ); }
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}
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}
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//____________________________________________________________________
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bool SplitterFactory::registerWidget( QWidget *widget )
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{
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// check widget type
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if( qobject_cast<QMainWindow*>( widget ) )
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{
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WidgetMap::iterator iter( _widgets.find( widget ) );
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if( iter == _widgets.end() || !iter.value() )
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{
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widget->installEventFilter( &_addEventFilter );
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SplitterProxy* proxy( new SplitterProxy( widget, _enabled ) );
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widget->removeEventFilter( &_addEventFilter );
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widget->installEventFilter( proxy );
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_widgets.insert( widget, proxy );
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} else {
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widget->removeEventFilter( iter.value().data() );
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widget->installEventFilter( iter.value().data() );
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}
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return true;
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} else if( qobject_cast<QSplitterHandle*>( widget ) ) {
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QWidget* window( widget->window() );
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WidgetMap::iterator iter( _widgets.find( window ) );
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if( iter == _widgets.end() || !iter.value() )
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{
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window->installEventFilter( &_addEventFilter );
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SplitterProxy* proxy( new SplitterProxy( window, _enabled ) );
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window->removeEventFilter( &_addEventFilter );
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widget->installEventFilter( proxy );
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_widgets.insert( window, proxy );
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} else {
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widget->removeEventFilter( iter.value().data() );
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widget->installEventFilter( iter.value().data() );
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}
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return true;
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} else return false;
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}
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//____________________________________________________________________
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void SplitterFactory::unregisterWidget( QWidget *widget )
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{
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WidgetMap::iterator iter( _widgets.find( widget ) );
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if( iter != _widgets.end() )
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{
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if( iter.value() ) iter.value().data()->deleteLater();
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_widgets.erase( iter );
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}
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}
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//____________________________________________________________________
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SplitterProxy::SplitterProxy( QWidget* parent, bool enabled ):
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QWidget( parent ),
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_enabled( enabled ),
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_timerId( 0 )
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{
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setAttribute( Qt::WA_TranslucentBackground, true );
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setAttribute( Qt::WA_OpaquePaintEvent, false );
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hide();
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}
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//____________________________________________________________________
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SplitterProxy::~SplitterProxy( void )
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{}
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//____________________________________________________________________
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void SplitterProxy::setEnabled( bool value )
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{
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// make sure status has changed
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if( _enabled != value )
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{
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_enabled = value;
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if( _enabled ) clearSplitter();
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}
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}
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//____________________________________________________________________
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bool SplitterProxy::eventFilter( QObject* object, QEvent* event )
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{
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// do nothing if disabled
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if( !_enabled ) return false;
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// do nothing in case of mouse grab
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if( mouseGrabber() ) return false;
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switch( event->type() )
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{
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case QEvent::HoverEnter:
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if( !isVisible() )
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{
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// cast to splitter handle
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if( QSplitterHandle* handle = qobject_cast<QSplitterHandle*>( object ) )
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{ setSplitter( handle ); }
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}
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return false;
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case QEvent::HoverMove:
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case QEvent::HoverLeave:
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return isVisible() && object == _splitter.data();
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case QEvent::MouseMove:
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case QEvent::Timer:
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case QEvent::Move:
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return false;
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case QEvent::CursorChange:
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if( QWidget *window = qobject_cast<QMainWindow*>( object ) )
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{
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if( window->cursor().shape() == Qt::SplitHCursor || window->cursor().shape() == Qt::SplitVCursor )
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{ setSplitter( window ); }
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}
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return false;
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case QEvent::WindowDeactivate:
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case QEvent::MouseButtonRelease:
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clearSplitter();
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return false;
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default:
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return false;
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}
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}
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//____________________________________________________________________
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bool SplitterProxy::event( QEvent *event )
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{
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switch( event->type() )
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{
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case QEvent::MouseMove:
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case QEvent::MouseButtonPress:
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case QEvent::MouseButtonRelease:
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{
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// check splitter
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if( !_splitter ) return false;
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event->accept();
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// grab on mouse press
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if( event->type() == QEvent::MouseButtonPress) grabMouse();
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parentWidget()->setUpdatesEnabled(false);
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resize(1,1);
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parentWidget()->setUpdatesEnabled(true);
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// cast to mouse event
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QMouseEvent *mouseEvent( static_cast<QMouseEvent*>( event ) );
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// get relevant position to post mouse drag event to application
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if( event->type() == QEvent::MouseButtonPress )
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{
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// use hook, to make sure splitter is properly dragged
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QMouseEvent mouseEvent2(
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mouseEvent->type(),
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_hook,
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_splitter.data()->mapToGlobal(_hook),
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mouseEvent->button(),
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mouseEvent->buttons(), mouseEvent->modifiers());
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QCoreApplication::sendEvent( _splitter.data(), &mouseEvent2 );
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} else {
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// map event position to current splitter and post.
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QMouseEvent mouseEvent2(
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mouseEvent->type(),
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_splitter.data()->mapFromGlobal( mouseEvent->globalPos() ),
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mouseEvent->globalPos(),
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mouseEvent->button(),
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mouseEvent->buttons(), mouseEvent->modifiers());
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QCoreApplication::sendEvent( _splitter.data(), &mouseEvent2 );
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}
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// release grab on mouse-Release
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if( event->type() == QEvent::MouseButtonRelease && mouseGrabber() == this )
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{ releaseMouse(); }
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return true;
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}
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case QEvent::Timer:
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if( static_cast<QTimerEvent*>( event )->timerId() != _timerId )
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{ return QWidget::event( event ); }
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if( mouseGrabber() == this )
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{ return true; }
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/*
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Fall through is intended.
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We somehow lost a QEvent::Leave and gonna fix that from here
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*/
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case QEvent::HoverLeave:
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case QEvent::Leave:
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{
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// reset splitter
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if( isVisible() && !rect().contains( mapFromGlobal( QCursor::pos() ) ) )
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{ clearSplitter(); }
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return true;
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}
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default:
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return QWidget::event( event );
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}
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}
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//____________________________________________________________________
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void SplitterProxy::setSplitter( QWidget* widget )
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{
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// check if changed
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if( _splitter.data() == widget ) return;
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_splitter = widget;
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_hook = _splitter.data()->mapFromGlobal(QCursor::pos());
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//
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QRect r( 0, 0, 2*StyleConfigData::splitterProxyWidth(), 2*StyleConfigData::splitterProxyWidth() );
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r.moveCenter( parentWidget()->mapFromGlobal( QCursor::pos() ) );
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setGeometry(r);
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setCursor( _splitter.data()->cursor().shape() );
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raise();
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show();
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/*
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timer used to automatically hide proxy
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in case leave events are lost
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*/
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if( !_timerId ) _timerId = startTimer(150);
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}
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//____________________________________________________________________
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void SplitterProxy::clearSplitter( void )
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{
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// check if changed
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if( !_splitter ) return;
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// release mouse
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if( mouseGrabber() == this ) releaseMouse();
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// hide
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parentWidget()->setUpdatesEnabled(false);
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hide();
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parentWidget()->setUpdatesEnabled(true);
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// set hover event
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if( _splitter )
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{
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QHoverEvent hoverEvent(
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qobject_cast<QSplitterHandle*>(_splitter.data()) ? QEvent::HoverLeave : QEvent::HoverMove,
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_splitter.data()->mapFromGlobal(QCursor::pos()), _hook);
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QCoreApplication::sendEvent( _splitter.data(), &hoverEvent );
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_splitter.clear();
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}
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// kill timer if any
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if( _timerId )
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{
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killTimer( _timerId );
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_timerId = 0;
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}
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}
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}
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