8cf8122314
Cleanup the Widget examples - use the new signal/slot syntax where possible - animation, effects and graphicsview subdirectory Change-Id: I6cbaea6e628eb06f8e0ca6a0b795030a66b83878 Reviewed-by: Luca Beldi <v.ronin@yahoo.it> Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
139 lines
4.9 KiB
C++
139 lines
4.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "fademessage.h"
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#include <QtWidgets>
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FadeMessage::FadeMessage(QWidget *parent): QGraphicsView(parent)
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{
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setScene(&m_scene);
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setupScene();
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m_animation = new QPropertyAnimation(m_effect, "strength", this);
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m_animation->setDuration(500);
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m_animation->setEasingCurve(QEasingCurve::InOutSine);
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m_animation->setStartValue(0);
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m_animation->setEndValue(1);
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setRenderHint(QPainter::Antialiasing, true);
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setFrameStyle(QFrame::NoFrame);
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}
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void FadeMessage::togglePopup()
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{
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if (m_message->isVisible()) {
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m_message->setVisible(false);
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m_animation->setDirection(QAbstractAnimation::Backward);
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} else {
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m_message->setVisible(true);
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m_animation->setDirection(QAbstractAnimation::Forward);
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}
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m_animation->start();
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}
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void FadeMessage::setupScene()
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{
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QGraphicsRectItem *parent = m_scene.addRect(0, 0, 800, 600);
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parent->setPen(Qt::NoPen);
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parent->setZValue(0);
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QGraphicsPixmapItem *bg = m_scene.addPixmap(QPixmap(":/background.jpg"));
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bg->setParentItem(parent);
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bg->setZValue(-1);
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for (int i = 1; i < 5; ++i)
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for (int j = 2; j < 5; ++j) {
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QGraphicsRectItem *item = m_scene.addRect(i * 50, (j - 1) * 50, 38, 38);
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item->setParentItem(parent);
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item->setZValue(1);
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int hue = 12 * (i * 5 + j);
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item->setBrush(QColor::fromHsv(hue, 128, 128));
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}
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QFont font;
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font.setPointSize(font.pointSize() * 2);
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font.setBold(true);
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QFontMetrics fontMetrics(font);
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int fh = fontMetrics.height();
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QString sceneText = "Qt Everywhere!";
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int sceneTextWidth = fontMetrics.horizontalAdvance(sceneText);
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QGraphicsRectItem *block = m_scene.addRect(50, 300, sceneTextWidth, fh + 3);
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block->setPen(Qt::NoPen);
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block->setBrush(QColor(102, 153, 51));
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QGraphicsTextItem *text = m_scene.addText(sceneText, font);
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text->setDefaultTextColor(Qt::white);
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text->setPos(50, 300);
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block->setZValue(2);
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block->hide();
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text->setParentItem(block);
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m_message = block;
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m_effect = new QGraphicsColorizeEffect;
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m_effect->setColor(QColor(122, 193, 66));
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m_effect->setStrength(0);
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m_effect->setEnabled(true);
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parent->setGraphicsEffect(m_effect);
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QPushButton *press = new QPushButton;
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press->setText(tr("Press me"));
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connect(press, &QAbstractButton::clicked, this, &FadeMessage::togglePopup);
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m_scene.addWidget(press);
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press->move(300, 500);
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}
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