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/*
* Cantata
*
* Copyright (c) 2011-2022 Craig Drummond <craig.p.drummond@gmail.com>
*
* ----
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "actionlabel.h"
#include "icons.h"
#include <QLabel>
#include <QPixmap>
#include <QTimer>
#include <QTransform>
// Borrowed from kolourpaint...
static QTransform transformWithZeroOrigin(const QTransform& matrix, int width, int height)
{
QRect newRect(matrix.mapRect(QRect(0, 0, width, height)));
return QTransform(matrix.m11(), matrix.m12(), matrix.m21(), matrix.m22(),
matrix.dx() - newRect.left(), matrix.dy() - newRect.top());
}
static QTransform rotateMatrix(int width, int height, double angle)
{
QTransform matrix;
matrix.translate(width / 2, height / 2);
matrix.rotate(angle);
return transformWithZeroOrigin(matrix, width, height);
}
static const int constNumIcons = 8;
static int theUsageCount;
static QPixmap* theIcons[constNumIcons];
ActionLabel::ActionLabel(QWidget* parent)
: QLabel(parent)
{
int iconSize = Icon::dlgIconSize();
int labelSize = Icon::stdSize((int)((iconSize * 1.333333333) + 0.5));
setMinimumSize(labelSize, labelSize);
setMaximumSize(labelSize, labelSize);
setAlignment(Qt::AlignCenter);
if (0 == theUsageCount++) {
QImage img(Icons::self()->audioListIcon.pixmap(iconSize, iconSize).toImage());
double increment = 360.0 / constNumIcons;
for (int i = 0; i < constNumIcons; ++i) {
theIcons[i] = new QPixmap(QPixmap::fromImage(0 == i ? img
: img.transformed(rotateMatrix(img.width(), img.height(), increment * i),
Qt::SmoothTransformation)));
}
}
setPixmap(*theIcons[0]);
timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), SLOT(rotateIcon()));
}
ActionLabel::~ActionLabel()
{
if (0 == --theUsageCount) {
for (int i = 0; i < constNumIcons; ++i) {
delete theIcons[i];
theIcons[i] = nullptr;
}
}
}
void ActionLabel::startAnimation()
{
count = 0;
setPixmap(*theIcons[0]);
timer->start(2000 / constNumIcons);
}
void ActionLabel::stopAnimation()
{
timer->stop();
count = 0;
setPixmap(*theIcons[count]);
}
void ActionLabel::rotateIcon()
{
if (++count == constNumIcons) {
count = 0;
}
setPixmap(*theIcons[count]);
}
#include "moc_actionlabel.cpp"
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