132 lines
3.3 KiB
C++
132 lines
3.3 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011-2013 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 "spinner.h"
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#include <QApplication>
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#ifdef ENABLE_KDE_SUPPORT
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Spinner::Spinner(QObject *p, bool inMiddle)
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: KPixmapSequenceOverlayPainter(p)
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, active(false)
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{
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setSequence(KPixmapSequence("process-working", KIconLoader::SizeSmallMedium));
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setAlignment(inMiddle ? Qt::AlignCenter : (Qt::AlignTop | (Qt::RightToLeft==QApplication::layoutDirection() ? Qt::AlignLeft : Qt::AlignRight)));
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}
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void Spinner::start()
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{
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active=true;
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KPixmapSequenceOverlayPainter::start();
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}
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void Spinner::stop()
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{
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active=false;
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KPixmapSequenceOverlayPainter::stop();
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}
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#else
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#include <QPainter>
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#include <QPaintEvent>
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#include <QTimer>
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Spinner::Spinner(QObject *p, bool inMiddle)
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: QWidget(0)
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, timer(0)
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, value(0)
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, active(false)
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, central(inMiddle)
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{
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Q_UNUSED(p)
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int size=fontMetrics().height()*2;
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setVisible(false);
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setMinimumSize(size, size);
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setMaximumSize(size, size);
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}
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void Spinner::start()
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{
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value=0;
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setVisible(true);
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setPosition();
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active=true;
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if (!timer) {
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timer=new QTimer(this);
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connect(timer, SIGNAL(timeout()), this, SLOT(timeout()));
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}
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timer->start(100);
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}
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void Spinner::stop()
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{
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setVisible(false);
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active=false;
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if (timer) {
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timer->stop();
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}
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}
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static const int constSpinnerSteps=64;
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void Spinner::paintEvent(QPaintEvent *event)
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{
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static const int constParts=8;
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QPainter p(this);
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QRectF rectangle(1.5, 1.5, size().width()-3, size().height()-3);
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QColor col(palette().color(QPalette::Text));
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p.setRenderHint(QPainter::Antialiasing, true);
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p.setClipRect(event->rect());
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double size=(360*16)/(2.0*constParts);
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for (int i=0; i<constParts; ++i) {
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col.setAlphaF((constParts-i)/(1.0*constParts));
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p.setPen(QPen(col, 2));
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p.drawArc(rectangle, (((constSpinnerSteps-value)*1.0)/(constSpinnerSteps*1.0)*360*16)+(i*2.0*size), size);
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}
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p.end();
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}
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void Spinner::timeout()
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{
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setPosition();
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update();
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if (++value>=constSpinnerSteps) {
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value=0;
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}
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}
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void Spinner::setPosition()
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{
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QPoint current=pos();
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QPoint desired=central
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? QPoint((parentWidget()->size().width()-size().width())/2, (parentWidget()->size().height()-size().height())/2)
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: Qt::RightToLeft==QApplication::layoutDirection()
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? QPoint(4, 4)
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: QPoint(parentWidget()->size().width()-(size().width()+4), 4);
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if (current!=desired) {
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move(desired);
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}
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}
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#endif
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