diff options
Diffstat (limited to 'examples/widgets/effects/blurpicker/blurpicker.cpp')
| -rw-r--r-- | examples/widgets/effects/blurpicker/blurpicker.cpp | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/examples/widgets/effects/blurpicker/blurpicker.cpp b/examples/widgets/effects/blurpicker/blurpicker.cpp new file mode 100644 index 0000000000..ab56b241f8 --- /dev/null +++ b/examples/widgets/effects/blurpicker/blurpicker.cpp @@ -0,0 +1,161 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "blurpicker.h" + +#include <QtWidgets> + +#include "blureffect.h" + +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +BlurPicker::BlurPicker(QWidget *parent): QGraphicsView(parent), m_index(0.0), m_animation(this, "index") +{ + setBackgroundBrush(QPixmap(":/images/background.jpg")); + setScene(new QGraphicsScene(this)); + + setupScene(); + setIndex(0); + + m_animation.setDuration(400); + m_animation.setEasingCurve(QEasingCurve::InOutSine); + + setRenderHint(QPainter::Antialiasing, true); + setFrameStyle(QFrame::NoFrame); +} + +qreal BlurPicker::index() const +{ + return m_index; +} + +void BlurPicker::setIndex(qreal index) +{ + m_index = index; + + qreal baseline = 0; + for (int i = 0; i < m_icons.count(); ++i) { + QGraphicsItem *icon = m_icons[i]; + qreal a = ((i + m_index) * 2 * M_PI) / m_icons.count(); + qreal xs = 170 * sin(a); + qreal ys = 100 * cos(a); + QPointF pos(xs, ys); + pos = QTransform().rotate(-20).map(pos); + pos -= QPointF(40, 40); + icon->setPos(pos); + baseline = qMax(baseline, ys); + static_cast<BlurEffect *>(icon->graphicsEffect())->setBaseLine(baseline); + } + + scene()->update(); +} + +void BlurPicker::setupScene() +{ + scene()->setSceneRect(-200, -120, 400, 240); + + QStringList names; + names << ":/images/accessories-calculator.png"; + names << ":/images/accessories-text-editor.png"; + names << ":/images/help-browser.png"; + names << ":/images/internet-group-chat.png"; + names << ":/images/internet-mail.png"; + names << ":/images/internet-web-browser.png"; + names << ":/images/office-calendar.png"; + names << ":/images/system-users.png"; + + for (int i = 0; i < names.count(); i++) { + QPixmap pixmap(names[i]); + QGraphicsPixmapItem *icon = scene()->addPixmap(pixmap); + icon->setZValue(1); + icon->setGraphicsEffect(new BlurEffect(icon)); + m_icons << icon; + } + + QGraphicsPixmapItem *bg = scene()->addPixmap(QPixmap(":/images/background.jpg")); + bg->setZValue(0); + bg->setPos(-200, -150); +} + +void BlurPicker::keyPressEvent(QKeyEvent *event) +{ + int delta = 0; + switch (event->key()) + { + case Qt::Key_Left: + delta = -1; + break; + case Qt::Key_Right: + delta = 1; + break; + default: + break; + } + if (m_animation.state() == QAbstractAnimation::Stopped && delta) { + m_animation.setEndValue(m_index + delta); + m_animation.start(); + event->accept(); + } +} + +void BlurPicker::resizeEvent(QResizeEvent */*event*/) +{ +} + +void BlurPicker::mousePressEvent(QMouseEvent *event) +{ + int delta = 0; + if(event->x() > (width() / 2)) + { + delta = 1; + } + else + { + delta = -1; + } + + if (m_animation.state() == QAbstractAnimation::Stopped && delta) { + m_animation.setEndValue(m_index + delta); + m_animation.start(); + event->accept(); + } +} |