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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: qt-info@nokia.com
**
** This software, including documentation, is protected by copyright
** controlled by Nokia Corporation. You may use this software in
** accordance with the terms and conditions contained in the Qt Phone
** Demo License Agreement.
**
****************************************************************************/
#include <QPropertyAnimation>
#include <QDebug>
#include "scrollbar.h"
#include "pixmaploader.h"
ScrollBar::ScrollBar(QGraphicsItem* parent)
: QGraphicsPixmapItem(PixmapLoader::getPic("scroll"), parent)
, m_knob(PixmapLoader::getPic("scroll_knob"), this)
, m_height(pixmap().height() - m_knob.pixmap().height())
, m_value(0.0)
, m_visible(false)
{
hide();
setOpacity(0.0);
m_knob.setPos(0.0, 0.0);
m_timer.setSingleShot(true);
m_timer.setInterval(1000);
connect(&m_timer, SIGNAL(timeout()), this, SLOT(timeout()));
}
int ScrollBar::loadImages()
{
PixmapLoader::load("scroll");
PixmapLoader::load("scroll_knob");
return 2;
}
bool ScrollBar::startAnimation(bool show)
{
if (show == m_visible)
return false;
m_visible = show;
m_timer.stop();
if (m_animation)
m_animation->stop();
QPropertyAnimation* animation = new QPropertyAnimation(this, "opacity");
animation->setEasingCurve(QEasingCurve::OutExpo);
animation->setDuration(500);
animation->setEndValue(show ? 1.0 : 0.0);
if (show)
connect(animation, SIGNAL(finished()), &m_timer, SLOT(start()));
else
connect(animation, SIGNAL(finished()), this, SLOT(hideScrollBar()));
m_animation = animation;
animation->start(QAbstractAnimation::DeleteWhenStopped);
return true;
}
void ScrollBar::setValue(qreal value)
{
if (value < 0 || value > 1.0)
return;
m_value = value;
m_knob.setPos(0, m_value * m_height);
show();
if (!startAnimation(true))
m_timer.start();
}
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