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Diffstat (limited to 'examples/effects/fademessage/fademessage.cpp')
| -rw-r--r-- | examples/effects/fademessage/fademessage.cpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/examples/effects/fademessage/fademessage.cpp b/examples/effects/fademessage/fademessage.cpp new file mode 100644 index 0000000000..88f9f89f1b --- /dev/null +++ b/examples/effects/fademessage/fademessage.cpp @@ -0,0 +1,129 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** 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 "fademessage.h" + +#include <QtGui> + +FadeMessage::FadeMessage(QWidget *parent): QGraphicsView(parent) +{ + setScene(&m_scene); + setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); + setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); + + setupScene(); + + m_animation = new QPropertyAnimation(m_effect, "strength", this); + m_animation->setDuration(500); + m_animation->setEasingCurve(QEasingCurve::InOutSine); + m_animation->setStartValue(0); + m_animation->setEndValue(1); + + + setRenderHint(QPainter::Antialiasing, true); + setFrameStyle(QFrame::NoFrame); +} + +void FadeMessage::togglePopup() +{ + if (m_message->isVisible()) { + m_message->setVisible(false); + m_animation->setDirection(QAbstractAnimation::Backward); + } else { + m_message->setVisible(true); + m_animation->setDirection(QAbstractAnimation::Forward); + } + m_animation->start(); +} + +void FadeMessage::setupScene() +{ + QGraphicsRectItem *parent = m_scene.addRect(0, 0, 400, 600); + parent->setPen(Qt::NoPen); + parent->setZValue(0); + + QGraphicsPixmapItem *bg = m_scene.addPixmap(QPixmap(":/background.jpg")); + bg->setParentItem(parent); + bg->setZValue(-1); + + for (int i = 1; i < 5; ++i) + for (int j = 2; j < 5; ++j) { + QGraphicsRectItem *item = m_scene.addRect(i * 50, j * 50, 38, 38); + item->setParentItem(parent); + item->setZValue(1); + int hue = 12 * (i * 5 + j); + item->setBrush(QColor::fromHsv(hue, 128, 128)); + } + + QFont font; + font.setPointSize(font.pointSize() * 2); + font.setBold(true); + QFontMetrics fontMetrics(font); + int fh = fontMetrics.height(); + + QString sceneText = "Qt Everywhere!"; + int sceneTextWidth = fontMetrics.width(sceneText); + + QGraphicsRectItem *block = m_scene.addRect(50, 300, sceneTextWidth, fh + 3); + block->setPen(Qt::NoPen); + block->setBrush(QColor(102, 153, 51)); + + QGraphicsTextItem *text = m_scene.addText(sceneText, font); + text->setDefaultTextColor(Qt::white); + text->setPos(50, 300); + block->setZValue(2); + block->hide(); + + text->setParentItem(block); + m_message = block; + + m_effect = new QGraphicsColorizeEffect; + m_effect->setColor(QColor(122, 193, 66)); + m_effect->setStrength(0); + m_effect->setEnabled(true); + parent->setGraphicsEffect(m_effect); + + QPushButton *press = new QPushButton; + press->setText(tr("Press me")); + connect(press, SIGNAL(clicked()), SLOT(togglePopup())); + m_scene.addWidget(press); + press->move(300, 500); +} + |