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/**************************************************************************** ** ** Copyright (C) 2007-2008 Trolltech ASA. All rights reserved. ** ** This file is part of the documentation of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License versions 2.0 or 3.0 as published by the Free Software ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3 ** included in the packaging of this file. Alternatively you may (at ** your option) use any later version of the GNU General Public ** License if such license has been publicly approved by Trolltech ASA ** (or its successors, if any) and the KDE Free Qt Foundation. In ** addition, as a special exception, Trolltech gives you certain ** additional rights. These rights are described in the Trolltech GPL ** Exception version 1.2, which can be found at ** http://www.trolltech.com/products/qt/gplexception/ and in the file ** GPL_EXCEPTION.txt in this package. ** ** Please review the following information to ensure GNU General ** Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If ** you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** In addition, as a special exception, Trolltech, as the sole ** copyright holder for Qt Designer, grants users of the Qt/Eclipse ** Integration plug-in the right for the Qt/Eclipse Integration to ** link to functionality provided by Qt Designer and its related ** libraries. ** ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly ** granted herein. ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ #include "chasewidget.h" #include <QtCore/QPoint> #include <QtGui/QApplication> #include <QtGui/QPainter> #include <QtGui/QPaintEvent> #include <QtGui/QHideEvent> #include <QtGui/QShowEvent> ChaseWidget::ChaseWidget(QWidget *parent, QPixmap pixmap, bool pixmapEnabled) : QWidget(parent) , m_segment(0) , m_delay(100) , m_step(40) , m_timerId(-1) , m_animated(false) , m_pixmap(pixmap) , m_pixmapEnabled(pixmapEnabled) { } ChaseWidget::~ChaseWidget() { } void ChaseWidget::setAnimated(bool val) { if (m_animated == val) return; m_animated = val; if (m_timerId != -1) { killTimer(m_timerId); m_timerId = -1; } if (m_animated) { m_segment = 0; m_timerId = startTimer(m_delay); } update(); } void ChaseWidget::showEvent(QShowEvent *e) { Q_UNUSED(e); } void ChaseWidget::hideEvent(QHideEvent *e) { Q_UNUSED(e); } void ChaseWidget::paintEvent(QPaintEvent *) { QPainter p(this); if (m_pixmapEnabled && !m_pixmap.isNull()) { p.drawPixmap(0, 0, m_pixmap); return; } const int extent = qMin(width() - 8, height() - 8); const int displ = extent / 4; const int ext = extent / 4 - 1; p.setRenderHint(QPainter::Antialiasing, true); if(m_animated) p.setPen(Qt::gray); else p.setPen(QPen(palette().dark().color())); p.translate(width() / 2, height() / 2); // center for (int segment = 0; segment < segmentCount(); segment++) { p.rotate(QApplication::isRightToLeft() ? m_step : -m_step); if(m_animated) p.setBrush(colorForSegment(segment)); else p.setBrush(palette().background()); p.drawEllipse(QRect(displ, -ext / 2, ext, ext)); } } QSize ChaseWidget::sizeHint() const { return QSize(32, 32); } void ChaseWidget::timerEvent(QTimerEvent *e) { if (e->timerId() == m_timerId) { m_segment++; update(); } } QColor ChaseWidget::colorForSegment(int seg) const { int index = ((seg + m_segment) % segmentCount()); int comp = qMax(0, 255 - (index * (255 / segmentCount()))); return QColor(comp, comp, comp, 255); } int ChaseWidget::segmentCount() const { return 360 / m_step; } void ChaseWidget::setPixmapEnabled(bool enable) { m_pixmapEnabled = enable; }
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