/*************************************************************************
* Copyright (C) 2014 by Hugo Pereira Da Costa <hugo.pereira@free.fr> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA . *
*************************************************************************/
#include "adwaitasplitterproxy.h"
#include "adwaita.h"
#include "fakeadwaitastyleconfigdata.h"
#include <QCoreApplication>
#include <QDebug>
#include <QPainter>
namespace Adwaita
{
//____________________________________________________________________
void SplitterFactory::setEnabled( bool value )
{
if( _enabled != value )
{
// store
_enabled = value;
// assign to existing splitters
for( WidgetMap::iterator iter = _widgets.begin(); iter != _widgets.end(); ++iter )
{ if( iter.value() ) iter.value().data()->setEnabled( value ); }
}
}
//____________________________________________________________________
bool SplitterFactory::registerWidget( QWidget *widget )
{
// check widget type
if( qobject_cast<QMainWindow*>( widget ) )
{
WidgetMap::iterator iter( _widgets.find( widget ) );
if( iter == _widgets.end() || !iter.value() )
{
widget->installEventFilter( &_addEventFilter );
SplitterProxy* proxy( new SplitterProxy( widget, _enabled ) );
widget->removeEventFilter( &_addEventFilter );
widget->installEventFilter( proxy );
_widgets.insert( widget, proxy );
} else {
widget->removeEventFilter( iter.value().data() );
widget->installEventFilter( iter.value().data() );
}
return true;
} else if( qobject_cast<QSplitterHandle*>( widget ) ) {
QWidget* window( widget->window() );
WidgetMap::iterator iter( _widgets.find( window ) );
if( iter == _widgets.end() || !iter.value() )
{
window->installEventFilter( &_addEventFilter );
SplitterProxy* proxy( new SplitterProxy( window, _enabled ) );
window->removeEventFilter( &_addEventFilter );
widget->installEventFilter( proxy );
_widgets.insert( window, proxy );
} else {
widget->removeEventFilter( iter.value().data() );
widget->installEventFilter( iter.value().data() );
}
return true;
} else return false;
}
//____________________________________________________________________
void SplitterFactory::unregisterWidget( QWidget *widget )
{
WidgetMap::iterator iter( _widgets.find( widget ) );
if( iter != _widgets.end() )
{
if( iter.value() ) iter.value().data()->deleteLater();
_widgets.erase( iter );
}
}
//____________________________________________________________________
SplitterProxy::SplitterProxy( QWidget* parent, bool enabled ):
QWidget( parent ),
_enabled( enabled ),
_timerId( 0 )
{
setAttribute( Qt::WA_TranslucentBackground, true );
setAttribute( Qt::WA_OpaquePaintEvent, false );
hide();
}
//____________________________________________________________________
SplitterProxy::~SplitterProxy( void )
{}
//____________________________________________________________________
void SplitterProxy::setEnabled( bool value )
{
// make sure status has changed
if( _enabled != value )
{
_enabled = value;
if( _enabled ) clearSplitter();
}
}
//____________________________________________________________________
bool SplitterProxy::eventFilter( QObject* object, QEvent* event )
{
// do nothing if disabled
if( !_enabled ) return false;
// do nothing in case of mouse grab
if( mouseGrabber() ) return false;
switch( event->type() )
{
case QEvent::HoverEnter:
if( !isVisible() )
{
// cast to splitter handle
if( QSplitterHandle* handle = qobject_cast<QSplitterHandle*>( object ) )
{ setSplitter( handle ); }
}
return false;
case QEvent::HoverMove:
case QEvent::HoverLeave:
return isVisible() && object == _splitter.data();
case QEvent::MouseMove:
case QEvent::Timer:
case QEvent::Move:
return false;
case QEvent::CursorChange:
if( QWidget *window = qobject_cast<QMainWindow*>( object ) )
{
if( window->cursor().shape() == Qt::SplitHCursor || window->cursor().shape() == Qt::SplitVCursor )
{ setSplitter( window ); }
}
return false;
case QEvent::WindowDeactivate:
case QEvent::MouseButtonRelease:
clearSplitter();
return false;
default:
return false;
}
}
//____________________________________________________________________
bool SplitterProxy::event( QEvent *event )
{
switch( event->type() )
{
#if 0
case QEvent::Paint:
{
QPainter painter( this );
painter.setClipRegion( static_cast<QPaintEvent*>( event )->region() );
painter.setRenderHints( QPainter::Antialiasing );
painter.setPen( Qt::red );
painter.drawRect( QRectF( rect() ).adjusted( 0.5, 0.5, -0.5, -0.5 ) );
return true;
}
#endif
case QEvent::MouseMove:
case QEvent::MouseButtonPress:
case QEvent::MouseButtonRelease:
{
// check splitter
if( !_splitter ) return false;
event->accept();
// grab on mouse press
if( event->type() == QEvent::MouseButtonPress)
{
grabMouse();
resize(1,1);
}
// cast to mouse event
QMouseEvent *mouseEvent( static_cast<QMouseEvent*>( event ) );
// get relevant position to post mouse drag event to application
if( event->type() == QEvent::MouseButtonPress )
{
// use hook, to make sure splitter is properly dragged
QMouseEvent copy(
mouseEvent->type(),
_hook,
_splitter.data()->mapToGlobal(_hook),
mouseEvent->button(),
mouseEvent->buttons(), mouseEvent->modifiers());
QCoreApplication::sendEvent( _splitter.data(), © );
} else {
// map event position to current splitter and post.
QMouseEvent copy(
mouseEvent->type(),
_splitter.data()->mapFromGlobal( mouseEvent->globalPos() ),
mouseEvent->globalPos(),
mouseEvent->button(),
mouseEvent->buttons(), mouseEvent->modifiers());
QCoreApplication::sendEvent( _splitter.data(), © );
}
// release grab on mouse-Release
if( event->type() == QEvent::MouseButtonRelease && mouseGrabber() == this )
{ releaseMouse(); }
return true;
}
case QEvent::Timer:
if( static_cast<QTimerEvent*>( event )->timerId() != _timerId )
{ return QWidget::event( event ); }
/*
Fall through is intended.
We somehow lost a QEvent::Leave before timeout. We fix it from here
*/
case QEvent::HoverLeave:
case QEvent::Leave:
{
if( mouseGrabber() == this )
{ return true; }
// reset splitter
if( isVisible() && !rect().contains( mapFromGlobal( QCursor::pos() ) ) )
{ clearSplitter(); }
return true;
}
default:
return QWidget::event( event );
}
}
//____________________________________________________________________
void SplitterProxy::setSplitter( QWidget* widget )
{
// check if changed
if( _splitter.data() == widget ) return;
// get cursor position
QPoint position( QCursor::pos() );
// store splitter and hook
_splitter = widget;
_hook = _splitter.data()->mapFromGlobal( position );
// adjust rect
QRect rect( 0, 0, 2*StyleConfigData::splitterProxyWidth(), 2*StyleConfigData::splitterProxyWidth() );
rect.moveCenter( parentWidget()->mapFromGlobal( position ) );
setGeometry( rect );
setCursor( _splitter.data()->cursor().shape() );
// show
raise();
show();
// timer used to automatically hide proxy in case leave events are lost
if( !_timerId ) _timerId = startTimer(150);
}
//____________________________________________________________________
void SplitterProxy::clearSplitter( void )
{
// check if changed
if( !_splitter ) return;
// release mouse
if( mouseGrabber() == this ) releaseMouse();
// hide
parentWidget()->setUpdatesEnabled(false);
hide();
parentWidget()->setUpdatesEnabled(true);
// send hover event
if( _splitter )
{
QHoverEvent hoverEvent(
qobject_cast<QSplitterHandle*>(_splitter.data()) ? QEvent::HoverLeave : QEvent::HoverMove,
_splitter.data()->mapFromGlobal(QCursor::pos()), _hook);
QCoreApplication::sendEvent( _splitter.data(), &hoverEvent );
_splitter.clear();
}
// kill timer if any
if( _timerId )
{
killTimer( _timerId );
_timerId = 0;
}
}
}