94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
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//////////////////////////////////////////////////////////////////////////////
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// OxygenTimeLine.h
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// derive from QTimeLine and is used to perform smooth transitions
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// -------------------
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//
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// Copyright (c) 2009 Hugo Pereira Da Costa <hugo.pereira@free.fr>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//////////////////////////////////////////////////////////////////////////////
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#include "oxygentimeline.h"
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#include "oxygentimeline.moc"
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#include <cassert>
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#include <KDebug>
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namespace Oxygen
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{
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//______________________________________________________
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OxygenTimeLine::OxygenTimeLine( int duration, QObject* parent ):
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QTimeLine( duration, parent ),
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direction_( Forward ),
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currentIndex_( 0 ),
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maxIndex_( 255 ),
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lastFrame_( 0 )
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{
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// connections
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connect( this, SIGNAL( frameChanged( int ) ), SLOT( updateCurrentIndex( int ) ) );
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}
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//______________________________________________________
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void OxygenTimeLine::start( void )
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{
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assert( state() == NotRunning );
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lastFrame_ = 0;
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QTimeLine::start();
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}
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//______________________________________________________
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void OxygenTimeLine::updateCurrentIndex( int currentFrame )
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{
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// check interval
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if( currentFrame <= lastFrame_ ) lastFrame_ = 0;
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// calculate step
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int step = (maxIndex()*( currentFrame - lastFrame_ ))/endFrame();
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if( direction_ == Backward ) step *= -1;
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// update lastFrame
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lastFrame_ = currentFrame;
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// check end conditions
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if( currentIndex_ + step <= 0 )
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{
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currentIndex_ = 0;
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emit currentIndexChanged( currentIndex_ );
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stop();
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} else if( currentIndex_ + step >= maxIndex_ ) {
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currentIndex_ = maxIndex_;
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emit currentIndexChanged( currentIndex_ );
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stop();
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} else {
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currentIndex_ += step;
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emit currentIndexChanged( currentIndex_ );
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}
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}
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}
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