File indexing completed on 2024-04-21 04:50:16

 /*
     SPDX-FileCopyrightText: 1998-2007 Sebastian Trueg <trueg@k3b.org>
 
     Based on the effects in popupMessage.cpp
     SPDX-FileCopyrightText: 2005 Max Howell <max.howell@methylblue.com>
     SPDX-FileCopyrightText: 2005 Seb Ruiz <me@sebruiz.net>
 
     Dissolve Mask (c) Kicker Authors kickertip.cpp, 2005/08/17
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "k3bwidgetshoweffect.h"
 
 #include <QTimerEvent>
 #include <QPainter>
 #include <QWidget>
 
 
 K3b::WidgetShowEffect::WidgetShowEffect( QWidget* widget, Effect e )
     : QObject( widget ),
       m_effect( e ),
       m_widget( widget ),
       m_dissolveSize( 0 ),
       m_dissolveDelta( -1 ),
       m_offset( 0 ),
       m_deleteSelf( false ),
       m_bEffectOnly( false )
 {
 }
 
 
 K3b::WidgetShowEffect::~WidgetShowEffect()
 {
 }
 
 
 void K3b::WidgetShowEffect::hide( bool effectOnly )
 {
     m_bEffectOnly = effectOnly;
     m_bShow = false;
     m_offset = m_widget->height();
     killTimer( m_timerId );
     m_timerId = startTimer( 6 );
 }
 
 
 void K3b::WidgetShowEffect::show( bool effectOnly )
 {
     m_bShow = true;
     m_offset = 0;
     m_dissolveSize = 24;
     m_dissolveDelta = -1;
 
     m_widget->ensurePolished();
 
     if( m_effect == Dissolve ) {
         // necessary to create the mask
         m_mask = QBitmap( m_widget->width(), m_widget->height() );
         // make the mask empty and hence will not show widget with show() called below
         dissolveMask();
         m_timerId = startTimer( 1000 / 30 );
     }
     else {
         m_widget->move( 0, m_widget->parentWidget()->height() );
         m_timerId = startTimer( 6 );
     }
 
     if( !effectOnly )
         m_widget->show();
 }
 
 
 void K3b::WidgetShowEffect::timerEvent( QTimerEvent* )
 {
     switch( m_effect ) {
     case Slide:
         slideMask();
         break;
 
     case Dissolve:
         dissolveMask();
         break;
     }
 }
 
 
 void K3b::WidgetShowEffect::dissolveMask()
 {
     if( m_bShow ) {
         m_widget->repaint();
         QPainter maskPainter(&m_mask);
 
         m_mask.fill(Qt::black);
 
         maskPainter.setBrush(Qt::white);
         maskPainter.setPen(Qt::white);
         maskPainter.drawRect( m_mask.rect() );
 
         m_dissolveSize += m_dissolveDelta;
 
         if( m_dissolveSize > 0 ) {
             //FIXME kde4
             //maskPainter.setRasterOp( Qt::EraseROP );
 
             int x, y, s;
             const int size = 16;
 
             for( y = 0; y < m_widget->height() + size; y += size ) {
                 x = m_widget->width();
                 s = m_dissolveSize * x / 128;
 
                 for( ; x > size; x -= size, s -= 2 ) {
                     if( s < 0 )
                         break;
 
                     maskPainter.drawEllipse(x - s / 2, y - s / 2, s, s);
                 }
             }
         }
         else if( m_dissolveSize < 0 ) {
             m_dissolveDelta = 1;
             killTimer( m_timerId );
 
             emit widgetShown( m_widget );
 
             if( m_deleteSelf )
                 deleteLater();
         }
 
         m_widget->setMask( m_mask );
     }
 
     else {
         // just hide it for now
         emit widgetHidden( m_widget );
         if( !m_bEffectOnly )
             m_widget->hide();
 
         if( m_deleteSelf )
             deleteLater();
     }
 }
 
 
 void K3b::WidgetShowEffect::slideMask()
 {
     if( m_bShow ) {
         m_widget->move( 0, m_widget->parentWidget()->height() - m_offset );
 
         m_offset++;
         if( m_offset > m_widget->height() ) {
             killTimer( m_timerId );
 
             emit widgetShown( m_widget );
 
             if( m_deleteSelf )
                 deleteLater();
         }
     }
     else {
         m_offset--;
         m_widget->move( 0, m_widget->parentWidget()->height() - m_offset );
 
         if( m_offset < 0 ) {
             // finally hide the widget
             emit widgetHidden( m_widget );
             if( !m_bEffectOnly )
                 m_widget->hide();
 
             if( m_deleteSelf )
                 deleteLater();
         }
     }
 }
 
 
 
 K3b::WidgetShowEffect* K3b::WidgetShowEffect::showWidget( QWidget* w, Effect m )
 {
     K3b::WidgetShowEffect* e = new K3b::WidgetShowEffect( w, m );
     e->m_deleteSelf = true;
     e->show();
     return e;
 }
 
 
 K3b::WidgetShowEffect* K3b::WidgetShowEffect::hideWidget( QWidget* w, Effect m )
 {
     K3b::WidgetShowEffect* e = new K3b::WidgetShowEffect( w, m );
     e->m_deleteSelf = true;
     e->hide();
     return e;
 }
 
 #include "moc_k3bwidgetshoweffect.cpp"