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rewrote timing of fading animation for not postponing updates of hidden fadeButton until it becomes visible

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git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@2056 0778d3d1-df1d-0410-868b-ea421aaaa00d
This commit is contained in:
Tobias Doerffel
2009-02-19 15:01:41 +00:00
parent 02e387c160
commit 9ff11564e0
3 changed files with 29 additions and 24 deletions
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36
src/gui/widgets/fade_button.cpp
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@@ -3,7 +3,7 @@
/*
* fade_button.cpp - implementation of fade-button
*
* Copyright (c) 2005-2008 Tobias Doerffel <tobydox/at/users.sourceforge.net>
* Copyright (c) 2005-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
*
* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
*
@@ -35,15 +35,19 @@
#include "update_event.h"
const float FadeDuration = 300;
fadeButton::fadeButton( const QColor & _normal_color,
const QColor & _activated_color, QWidget * _parent ) :
QAbstractButton( _parent ),
m_state( 0.0f ),
m_stateTimer(),
m_normalColor( _normal_color ),
m_activatedColor( _activated_color )
{
setAttribute( Qt::WA_OpaquePaintEvent, true );
setCursor( QCursor( embed::getIconPixmap( "hand" ), 0, 0 ) );
setFocusPolicy( Qt::NoFocus );
}
@@ -58,21 +62,12 @@ fadeButton::~fadeButton()
void fadeButton::activate( void )
{
m_state = 1.00f;
m_stateTimer.restart();
signalUpdate();
}
void fadeButton::reset( void )
{
m_state = 0.0f;
signalUpdate();
}
void fadeButton::customEvent( QEvent * )
{
@@ -85,20 +80,19 @@ void fadeButton::customEvent( QEvent * )
void fadeButton::paintEvent( QPaintEvent * _pe )
{
QColor col = m_normalColor;
if( m_state > 0.0f )
if( m_stateTimer.elapsed() < FadeDuration )
{
const float state = 1 - m_stateTimer.elapsed() / FadeDuration;
const int r = (int)( m_normalColor.red() *
( 1.0f - m_state ) +
m_activatedColor.red() * m_state );
( 1.0f - state ) +
m_activatedColor.red() * state );
const int g = (int)( m_normalColor.green() *
( 1.0f - m_state ) +
m_activatedColor.green() * m_state );
( 1.0f - state ) +
m_activatedColor.green() * state );
const int b = (int)( m_normalColor.blue() *
( 1.0f - m_state ) +
m_activatedColor.blue() * m_state );
( 1.0f - state ) +
m_activatedColor.blue() * state );
col.setRgb( r, g, b );
m_state -= 0.1f;
QTimer::singleShot( 20, this, SLOT( update() ) );
}