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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "button.h"
#include <QMouseEvent>
#include <QPainter>
#include <QTimer>
Button::Button(QWidget *parent, Qt::WindowFlags f) :
QLabel(parent, f)
{
m_downPixmap = 0;
m_disabled = false;
}
Button::~Button()
{
}
void Button::disableBtn(bool b)
{
m_disabled = b;
if (m_disabled) {
setPixmap(m_downPixmap);
} else {
setPixmap(m_upPixmap);
}
}
void Button::mousePressEvent(QMouseEvent *event)
{
if (!m_disabled) {
event->accept();
setPixmap(m_downPixmap);
repaint();
// Lift button back to up after 300ms
QTimer::singleShot(300, this, SLOT(backToUp()));
}
}
void Button::backToUp()
{
setPixmap(m_upPixmap);
repaint();
emit pressed();
}
void Button::setPixmap(const QPixmap& p)
{
// Set up and down picture for the button
// Set pixmap
if (!p.isNull())
QLabel::setPixmap(p);
// Make down pixmap if it does not exists
if (m_downPixmap.isNull()) {
// Store up pixmap
m_upPixmap = *pixmap();
// Create down pixmap
// Make m_downPixmap as a transparent m_upPixmap
QPixmap transparent(m_upPixmap.size());
transparent.fill(Qt::transparent);
QPainter painter(&transparent);
painter.setCompositionMode(QPainter::CompositionMode_Source);
painter.drawPixmap(0, 0, m_upPixmap);
painter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
painter.fillRect(transparent.rect(), QColor(0, 0, 0, 150));
painter.end();
m_downPixmap = transparent;
}
}
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