mirror of
https://github.com/crystalidea/qt6windows7.git
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92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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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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