forked from Qortal/Brooklyn
92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
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/*
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SPDX-FileCopyrightText: 2003-2007 Craig Drummond <craig@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "ActionLabel.h"
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#include <KIconLoader>
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#include <QPixmap>
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#include <QTimer>
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#include <QTransform>
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namespace KFI
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{
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// Borrowed from kolourpaint...
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static QTransform matrixWithZeroOrigin(const QTransform &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(), 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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QTransform matrix;
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matrix.translate(width / 2.0, height / 2.0);
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matrix.rotate(angle);
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return matrixWithZeroOrigin(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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CActionLabel::CActionLabel(QWidget *parent)
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: QLabel(parent)
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{
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static const int constIconSize(48);
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setMinimumSize(constIconSize, constIconSize);
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setMaximumSize(constIconSize, constIconSize);
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setAlignment(Qt::AlignCenter);
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if (0 == theUsageCount++) {
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QImage img(KIconLoader::global()->loadIcon("application-x-font-ttf", KIconLoader::NoGroup, 32).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 : img.transformed(rotateMatrix(img.width(), img.height(), increment * i))));
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}
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}
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setPixmap(*theIcons[0]);
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m_timer = new QTimer(this);
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connect(m_timer, &QTimer::timeout, this, &CActionLabel::rotateIcon);
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}
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CActionLabel::~CActionLabel()
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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 CActionLabel::startAnimation()
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{
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m_count = 0;
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setPixmap(*theIcons[0]);
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m_timer->start(1000 / constNumIcons);
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}
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void CActionLabel::stopAnimation()
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{
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m_timer->stop();
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m_count = 0;
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setPixmap(*theIcons[m_count]);
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}
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void CActionLabel::rotateIcon()
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{
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if (++m_count == constNumIcons) {
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m_count = 0;
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}
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setPixmap(*theIcons[m_count]);
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}
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}
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