//////////////////////////////////////////////////////////////////////////////
// adwaitatransitionwidget.cpp
// stores event filters and maps widgets to transitions for transitions
// -------------------
//
// Copyright (c) 2009 Hugo Pereira Da Costa <hugo.pereira@free.fr>
//
// 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 "adwaitatransitionwidget.h"
#include <QPainter>
#include <QPaintEvent>
#include <QStyleOption>
#include <QTextStream>
namespace Adwaita
{
//________________________________________________
bool TransitionWidget::_paintEnabled = true;
bool TransitionWidget::paintEnabled( void )
{ return _paintEnabled; }
int TransitionWidget::_steps = 0;
//________________________________________________
TransitionWidget::TransitionWidget( QWidget* parent, int duration ):
QWidget( parent ),
_animation( new Animation( duration, this ) )
{
// background flags
setAttribute( Qt::WA_NoSystemBackground );
setAutoFillBackground( false );
// setup animation
_animation.data()->setStartValue( 0 );
_animation.data()->setEndValue( 1.0 );
_animation.data()->setTargetObject( this );
_animation.data()->setPropertyName( "opacity" );
// hide when animation is finished
connect( _animation.data(), SIGNAL(finished()), SLOT(hide()) );
}
//________________________________________________
QPixmap TransitionWidget::grab( QWidget* widget, QRect rect )
{
// change rect
if( !rect.isValid() ) rect = widget->rect();
if( !rect.isValid() ) return QPixmap();
// initialize pixmap
QPixmap out( rect.size() );
out.fill( Qt::transparent );
_paintEnabled = false;
if( testFlag( GrabFromWindow ) )
{
rect = rect.translated( widget->mapTo( widget->window(), widget->rect().topLeft() ) );
widget = widget->window();
#if QT_VERSION < 0x050000
out = QPixmap::grabWidget( widget, rect );
#else
out = widget->grab( rect );
#endif
} else {
if( !testFlag( Transparent ) ) { grabBackground( out, widget, rect ); }
grabWidget( out, widget, rect );
}
_paintEnabled = true;
return out;
}
//________________________________________________
bool TransitionWidget::event( QEvent* event )
{
switch( event->type() )
{
case QEvent::MouseButtonPress:
case QEvent::MouseButtonRelease:
case QEvent::KeyPress:
case QEvent::KeyRelease:
endAnimation();
hide();
event->ignore();
return false;
default: return QWidget::event( event );
}
}
//________________________________________________
void TransitionWidget::paintEvent( QPaintEvent* event )
{
// fully transparent case
if( opacity() >= 1.0 && endPixmap().isNull() ) return;
if( !_paintEnabled ) return;
// get rect
QRect rect = event->rect();
if( !rect.isValid() ) rect = this->rect();
// local pixmap
bool paintOnWidget( testFlag( PaintOnWidget ) && !testFlag( Transparent ) );
if( !paintOnWidget )
{
if( _currentPixmap.isNull() || _currentPixmap.size() != size() )
{ _currentPixmap = QPixmap( size() ); }
}
// fill
_currentPixmap.fill( Qt::transparent );
// copy local pixmap to current
{
QPainter p;
// draw end pixmap first, provided that opacity is small enough
if( opacity() >= 0.004 && !_endPixmap.isNull() )
{
// faded endPixmap if parent target is transparent and opacity is
if( opacity() <= 0.996 && testFlag( Transparent ) )
{
fade( _endPixmap, _currentPixmap, opacity(), rect );
p.begin( &_currentPixmap );
p.setClipRect( event->rect() );
} else {
if( paintOnWidget ) p.begin( this );
else p.begin( &_currentPixmap );
p.setClipRect( event->rect() );
p.drawPixmap( QPoint(), _endPixmap );
}
} else {
if( paintOnWidget ) p.begin( this );
else p.begin( &_currentPixmap );
p.setClipRect( event->rect() );
}
// draw fading start pixmap
if( opacity() <= 0.996 && !_startPixmap.isNull() )
{
if( opacity() >= 0.004 )
{
fade( _startPixmap, _localStartPixmap, 1.0-opacity(), rect );
p.drawPixmap( QPoint(), _localStartPixmap );
} else p.drawPixmap( QPoint(), _startPixmap );
}
p.end();
}
// copy current pixmap on widget
if( !paintOnWidget )
{
QPainter p( this );
p.setClipRect( event->rect() );
p.drawPixmap( QPoint(0,0), _currentPixmap );
p.end();
}
}
//________________________________________________
void TransitionWidget::grabBackground( QPixmap& pixmap, QWidget* widget, QRect& rect ) const
{
if( !widget ) return;
QWidgetList widgets;
if( widget->autoFillBackground() )
{ widgets.append( widget ); }
QWidget *parent(0);
// get highest level parent
for( parent = widget->parentWidget(); parent; parent = parent->parentWidget() )
{
if( !( parent->isVisible() && parent->rect().isValid() ) ) continue;
// store in list
widgets.append( parent );
// stop at topLevel
if( parent->isTopLevel() || parent->autoFillBackground() ) break;
}
if( !parent ) parent = widget;
// painting
QPainter p(&pixmap);
p.setClipRect( rect );
QBrush backgroundBrush = parent->palette().brush( parent->backgroundRole());
if( backgroundBrush.style() == Qt::TexturePattern)
{
p.drawTiledPixmap( rect, backgroundBrush.texture(), widget->mapTo( parent, rect.topLeft() ) );
} else {
p.fillRect( pixmap.rect(), backgroundBrush );
}
if( parent->isTopLevel() && parent->testAttribute(Qt::WA_StyledBackground))
{
QStyleOption option;
option.initFrom(parent);
option.rect = rect;
option.rect.translate( widget->mapTo( parent, rect.topLeft() ) );
p.translate(-option.rect.topLeft());
parent->style()->drawPrimitive ( QStyle::PE_Widget, &option, &p, parent );
p.translate(option.rect.topLeft());
}
// draw all widgets in parent list
// backward
QPaintEvent event(rect);
for( int i = widgets.size() - 1; i>=0; i-- )
{
QWidget* w = widgets.at(i);
w->render( &p, -widget->mapTo( w, rect.topLeft() ), rect, 0 );
}
// end
p.end();
}
//________________________________________________
void TransitionWidget::grabWidget( QPixmap& pixmap, QWidget* widget, QRect& rect ) const
{ widget->render( &pixmap, pixmap.rect().topLeft(), rect, QWidget::DrawChildren ); }
//________________________________________________
void TransitionWidget::fade( const QPixmap& source, QPixmap& target, qreal opacity, const QRect& rect ) const
{
if( target.isNull() || target.size() != size() )
{ target = QPixmap( size() ); }
// erase target
target.fill( Qt::transparent );
// check opacity
if( opacity*255 < 1 ) return;
QPainter p( &target );
p.setClipRect( rect );
// draw pixmap
p.drawPixmap( QPoint(0,0), source );
// opacity mask (0.996 corresponds to 254/255)
if( opacity <= 0.996 )
{
p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
QColor color( Qt::black );
color.setAlphaF( opacity );
p.fillRect(rect, color );
}
p.end();
return;
}
}