113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011-2021 Craig Drummond <craig.p.drummond@gmail.com>
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*
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* ----
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "actionlabel.h"
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#include "icons.h"
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#include <QLabel>
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#include <QTimer>
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#include <QPixmap>
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#include <QMatrix>
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// Borrowed from kolourpaint...
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static QTransform transformWithZeroOrigin(const QMatrix &matrix, int width, int height)
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{
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QRect newRect(matrix.mapRect(QRect(0, 0, width, height)));
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return QTransform(matrix.m11(), matrix.m12(), matrix.m21(), matrix.m22(),
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matrix.dx() - newRect.left(), matrix.dy() - newRect.top());
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}
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static QTransform rotateMatrix(int width, int height, double angle)
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{
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QMatrix matrix;
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matrix.translate(width/2, height/2);
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matrix.rotate(angle);
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return transformWithZeroOrigin(matrix, width, height);
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}
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static const int constNumIcons=8;
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static int theUsageCount;
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static QPixmap *theIcons[constNumIcons];
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ActionLabel::ActionLabel(QWidget *parent)
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: QLabel(parent)
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{
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int iconSize=Icon::dlgIconSize();
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int labelSize=Icon::stdSize((int)((iconSize*1.333333333)+0.5));
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setMinimumSize(labelSize, labelSize);
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setMaximumSize(labelSize, labelSize);
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setAlignment(Qt::AlignCenter);
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if(0==theUsageCount++) {
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QImage img(Icons::self()->audioListIcon.pixmap(iconSize, iconSize).toImage());
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double increment=360.0/constNumIcons;
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for(int i=0; i<constNumIcons; ++i) {
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theIcons[i]=new QPixmap(QPixmap::fromImage(0==i ? img
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: img.transformed(rotateMatrix(img.width(), img.height(), increment*i),
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Qt::SmoothTransformation)));
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}
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}
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setPixmap(*theIcons[0]);
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timer=new QTimer(this);
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connect(timer, SIGNAL(timeout()), SLOT(rotateIcon()));
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}
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ActionLabel::~ActionLabel()
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{
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if (0==--theUsageCount) {
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for (int i=0; i<constNumIcons; ++i) {
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delete theIcons[i];
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theIcons[i]=nullptr;
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}
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}
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}
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void ActionLabel::startAnimation()
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{
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count=0;
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setPixmap(*theIcons[0]);
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timer->start(2000/constNumIcons);
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}
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void ActionLabel::stopAnimation()
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{
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timer->stop();
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count=0;
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setPixmap(*theIcons[count]);
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}
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void ActionLabel::rotateIcon()
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{
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if (++count==constNumIcons) {
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count=0;
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}
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setPixmap(*theIcons[count]);
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}
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#include "moc_actionlabel.cpp"
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