qt-everywhere-src-5.15.1/qtdeclarative/examples/quick/quickwidgets/qquickviewcomparison/mainwindow.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2017 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, 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 The Qt Company Ltd 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 "mainwindow.h"
 #include "fbitem.h"
 #include <QVBoxLayout>
 #include <QGroupBox>
 #include <QRadioButton>
 #include <QCheckBox>
 #include <QLabel>
 #include <QQuickItem>

 MainWindow::MainWindow(bool transparency, bool noRenderAlpha)
     : m_currentView(nullptr),
       m_currentRootObject(nullptr),
       m_transparent(transparency),
       m_noRenderAlpha(noRenderAlpha)
 {
     QVBoxLayout *layout = new QVBoxLayout;

     QGroupBox *groupBox = new QGroupBox(tr("Type"));
     QVBoxLayout *vbox = new QVBoxLayout;
     m_radioView = new QRadioButton(tr("QQuickView in a window container (direct)"));
     m_radioWidget = new QRadioButton(tr("QQuickWidget (indirect through framebuffer objects)"));
     vbox->addWidget(m_radioWidget);
     vbox->addWidget(m_radioView);
     m_radioWidget->setChecked(true);
     m_state = Unknown;
     connect(m_radioWidget, &QRadioButton::toggled, this, &MainWindow::updateView);
     connect(m_radioView, &QRadioButton::toggled, this, &MainWindow::updateView);
     groupBox->setLayout(vbox);

     layout->addWidget(groupBox);

     m_checkboxMultiSample = new QCheckBox(tr("Multisample (4x)"));
     connect(m_checkboxMultiSample, &QCheckBox::toggled, this, &MainWindow::updateView);
     layout->addWidget(m_checkboxMultiSample);

     m_labelStatus = new QLabel;
     layout->addWidget(m_labelStatus);

     QWidget *quickContainer = new QWidget;
     layout->addWidget(quickContainer);
     layout->setStretchFactor(quickContainer, 8);
     m_containerLayout = new QVBoxLayout;
     quickContainer->setLayout(m_containerLayout);

     // Add an overlay widget to demonstrate that it will _not_ work with
     // QQuickView, whereas it is perfectly fine with QQuickWidget.
     QPalette semiTransparent(QColor(255,0,0,128));
     semiTransparent.setBrush(QPalette::Text, Qt::white);
     semiTransparent.setBrush(QPalette::WindowText, Qt::white);

     m_overlayLabel = new QLabel("This is a\nsemi-transparent\n overlay widget\nwhich is placed\non top\n of the Quick\ncontent.", this);
     m_overlayLabel->setAlignment(Qt::AlignHCenter | Qt::AlignTop);
     m_overlayLabel->setAutoFillBackground(true);
     m_overlayLabel->setPalette(semiTransparent);
     QFont f = font();
     f.setPixelSize(QFontInfo(f).pixelSize()*2);
     f.setWeight(QFont::Bold);
     m_overlayLabel->setFont(f);
     m_overlayLabel->hide();

     m_checkboxOverlayVisible = new QCheckBox(tr("Show widget overlay"));
     connect(m_checkboxOverlayVisible, &QCheckBox::toggled, m_overlayLabel, &QWidget::setVisible);
     layout->addWidget(m_checkboxOverlayVisible);

     setLayout(layout);

     updateView();
 }

 void MainWindow::resizeEvent(QResizeEvent*)
 {
     int margin = width() / 10;
     int top = m_checkboxMultiSample->y();
     int bottom = m_checkboxOverlayVisible->geometry().bottom();
     m_overlayLabel->setGeometry(margin, top, width() - 2 * margin, bottom - top);
 }

 void MainWindow::switchTo(QWidget *view)
 {
     if (m_containerLayout->count())
         m_containerLayout->takeAt(0);

     delete m_currentView;
     m_currentView = view;
     m_containerLayout->addWidget(m_currentView);
     m_currentView->setFocus();
 }

 void MainWindow::updateView()
 {
     QSurfaceFormat format;
     format.setDepthBufferSize(16);
     format.setStencilBufferSize(8);
     if (m_transparent)
         format.setAlphaBufferSize(8);
     if (m_checkboxMultiSample->isChecked())
         format.setSamples(4);

     State state = m_radioView->isChecked() ? UseWindow : UseWidget;

     if (m_format == format && m_state == state)
         return;

     m_format = format;
     m_state = state;

     QString text = m_currentRootObject
             ? m_currentRootObject->property("currentText").toString()
             : QStringLiteral("Hello Qt");

     QUrl source("qrc:qquickviewcomparison/test.qml");

     if (m_state == UseWindow) {
         QQuickView *quickView = new QQuickView;
         // m_transparent is not supported here since many systems have problems with semi-transparent child windows
         quickView->setFormat(m_format);
         quickView->setResizeMode(QQuickView::SizeRootObjectToView);
         connect(quickView, &QQuickView::statusChanged, this, &MainWindow::onStatusChangedView);
         connect(quickView, &QQuickView::sceneGraphError, this, &MainWindow::onSceneGraphError);
         quickView->setSource(source);
         m_currentRootObject = quickView->rootObject();
         switchTo(QWidget::createWindowContainer(quickView));
     } else if (m_state == UseWidget) {
         QQuickWidget *quickWidget = new QQuickWidget;
         if (m_transparent)
             quickWidget->setClearColor(Qt::transparent);
         quickWidget->setFormat(m_format);
         quickWidget->setResizeMode(QQuickWidget::SizeRootObjectToView);
         connect(quickWidget, &QQuickWidget::statusChanged, this, &MainWindow::onStatusChangedWidget);
         connect(quickWidget, &QQuickWidget::sceneGraphError, this, &MainWindow::onSceneGraphError);
         quickWidget->setSource(source);
         m_currentRootObject = quickWidget->rootObject();
         switchTo(quickWidget);
     }

     if (m_currentRootObject) {
         m_currentRootObject->setProperty("currentText", text);
         m_currentRootObject->setProperty("multisample", m_checkboxMultiSample->isChecked());
         if (!m_noRenderAlpha)
             m_currentRootObject->setProperty("translucency", m_transparent);
     }

     m_overlayLabel->raise();
 }

 void MainWindow::onStatusChangedView(QQuickView::Status status)
 {
     QString s;
     switch (status) {
     case QQuickView::Null:
         s = tr("Null");
         break;
     case QQuickView::Ready:
         s = tr("Ready");
         break;
     case QQuickView::Loading:
         s = tr("Loading");
         break;
     case QQuickView::Error:
         s = tr("Error");
         break;
     default:
         s = tr("Unknown");
         break;
     }
     m_labelStatus->setText(tr("QQuickView status: %1").arg(s));
 }

 void MainWindow::onStatusChangedWidget(QQuickWidget::Status status)
 {
     QString s;
     switch (status) {
     case QQuickWidget::Null:
         s = tr("Null");
         break;
     case QQuickWidget::Ready:
         s = tr("Ready");
         break;
     case QQuickWidget::Loading:
         s = tr("Loading");
         break;
     case QQuickWidget::Error:
         s = tr("Error");
         break;
     default:
         s = tr("Unknown");
         break;
     }
     m_labelStatus->setText(tr("QQuickWidget status: %1").arg(s));
 }

 void MainWindow::onSceneGraphError(QQuickWindow::SceneGraphError error, const QString &message)
 {
     m_labelStatus->setText(tr("Scenegraph error %1: %2").arg(error).arg(message));
 }
	/****************************************************************************
	**
	** Copyright (C) 2017 The Qt Company Ltd.
	** Contact: https://www.qt.io/licensing/
	**
	** This file is part of the examples of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:BSD$
	** Commercial License Usage
	** Licensees holding valid commercial Qt licenses may use this file in
	** accordance with the commercial license agreement provided with the
	** Software or, alternatively, in accordance with the terms contained in
	** a written agreement between you and The Qt Company. For licensing terms
	** and conditions see https://www.qt.io/terms-conditions. For further
	** information use the contact form at https://www.qt.io/contact-us.
	**
	** BSD License Usage
	** Alternatively, 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 The Qt Company Ltd 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 "mainwindow.h"
	#include "fbitem.h"
	#include <QVBoxLayout>
	#include <QGroupBox>
	#include <QRadioButton>
	#include <QCheckBox>
	#include <QLabel>
	#include <QQuickItem>

	MainWindow::MainWindow(bool transparency, bool noRenderAlpha)
	: m_currentView(nullptr),
	m_currentRootObject(nullptr),
	m_transparent(transparency),
	m_noRenderAlpha(noRenderAlpha)
	{
	QVBoxLayout *layout = new QVBoxLayout;

	QGroupBox *groupBox = new QGroupBox(tr("Type"));
	QVBoxLayout *vbox = new QVBoxLayout;
	m_radioView = new QRadioButton(tr("QQuickView in a window container (direct)"));
	m_radioWidget = new QRadioButton(tr("QQuickWidget (indirect through framebuffer objects)"));
	vbox->addWidget(m_radioWidget);
	vbox->addWidget(m_radioView);
	m_radioWidget->setChecked(true);
	m_state = Unknown;
	connect(m_radioWidget, &QRadioButton::toggled, this, &MainWindow::updateView);
	connect(m_radioView, &QRadioButton::toggled, this, &MainWindow::updateView);
	groupBox->setLayout(vbox);

	layout->addWidget(groupBox);

	m_checkboxMultiSample = new QCheckBox(tr("Multisample (4x)"));
	connect(m_checkboxMultiSample, &QCheckBox::toggled, this, &MainWindow::updateView);
	layout->addWidget(m_checkboxMultiSample);

	m_labelStatus = new QLabel;
	layout->addWidget(m_labelStatus);

	QWidget *quickContainer = new QWidget;
	layout->addWidget(quickContainer);
	layout->setStretchFactor(quickContainer, 8);
	m_containerLayout = new QVBoxLayout;
	quickContainer->setLayout(m_containerLayout);

	// Add an overlay widget to demonstrate that it will _not_ work with
	// QQuickView, whereas it is perfectly fine with QQuickWidget.
	QPalette semiTransparent(QColor(255,0,0,128));
	semiTransparent.setBrush(QPalette::Text, Qt::white);
	semiTransparent.setBrush(QPalette::WindowText, Qt::white);

	m_overlayLabel = new QLabel("This is a\nsemi-transparent\n overlay widget\nwhich is placed\non top\n of the Quick\ncontent.", this);
	m_overlayLabel->setAlignment(Qt::AlignHCenter \| Qt::AlignTop);
	m_overlayLabel->setAutoFillBackground(true);
	m_overlayLabel->setPalette(semiTransparent);
	QFont f = font();
	f.setPixelSize(QFontInfo(f).pixelSize()*2);
	f.setWeight(QFont::Bold);
	m_overlayLabel->setFont(f);
	m_overlayLabel->hide();

	m_checkboxOverlayVisible = new QCheckBox(tr("Show widget overlay"));
	connect(m_checkboxOverlayVisible, &QCheckBox::toggled, m_overlayLabel, &QWidget::setVisible);
	layout->addWidget(m_checkboxOverlayVisible);

	setLayout(layout);

	updateView();
	}

	void MainWindow::resizeEvent(QResizeEvent*)
	{
	int margin = width() / 10;
	int top = m_checkboxMultiSample->y();
	int bottom = m_checkboxOverlayVisible->geometry().bottom();
	m_overlayLabel->setGeometry(margin, top, width() - 2 * margin, bottom - top);
	}

	void MainWindow::switchTo(QWidget *view)
	{
	if (m_containerLayout->count())
	m_containerLayout->takeAt(0);

	delete m_currentView;
	m_currentView = view;
	m_containerLayout->addWidget(m_currentView);
	m_currentView->setFocus();
	}

	void MainWindow::updateView()
	{
	QSurfaceFormat format;
	format.setDepthBufferSize(16);
	format.setStencilBufferSize(8);
	if (m_transparent)
	format.setAlphaBufferSize(8);
	if (m_checkboxMultiSample->isChecked())
	format.setSamples(4);

	State state = m_radioView->isChecked() ? UseWindow : UseWidget;

	if (m_format == format && m_state == state)
	return;

	m_format = format;
	m_state = state;

	QString text = m_currentRootObject
	? m_currentRootObject->property("currentText").toString()
	: QStringLiteral("Hello Qt");

	QUrl source("qrc:qquickviewcomparison/test.qml");

	if (m_state == UseWindow) {
	QQuickView *quickView = new QQuickView;
	// m_transparent is not supported here since many systems have problems with semi-transparent child windows
	quickView->setFormat(m_format);
	quickView->setResizeMode(QQuickView::SizeRootObjectToView);
	connect(quickView, &QQuickView::statusChanged, this, &MainWindow::onStatusChangedView);
	connect(quickView, &QQuickView::sceneGraphError, this, &MainWindow::onSceneGraphError);
	quickView->setSource(source);
	m_currentRootObject = quickView->rootObject();
	switchTo(QWidget::createWindowContainer(quickView));
	} else if (m_state == UseWidget) {
	QQuickWidget *quickWidget = new QQuickWidget;
	if (m_transparent)
	quickWidget->setClearColor(Qt::transparent);
	quickWidget->setFormat(m_format);
	quickWidget->setResizeMode(QQuickWidget::SizeRootObjectToView);
	connect(quickWidget, &QQuickWidget::statusChanged, this, &MainWindow::onStatusChangedWidget);
	connect(quickWidget, &QQuickWidget::sceneGraphError, this, &MainWindow::onSceneGraphError);
	quickWidget->setSource(source);
	m_currentRootObject = quickWidget->rootObject();
	switchTo(quickWidget);
	}

	if (m_currentRootObject) {
	m_currentRootObject->setProperty("currentText", text);
	m_currentRootObject->setProperty("multisample", m_checkboxMultiSample->isChecked());
	if (!m_noRenderAlpha)
	m_currentRootObject->setProperty("translucency", m_transparent);
	}

	m_overlayLabel->raise();
	}

	void MainWindow::onStatusChangedView(QQuickView::Status status)
	{
	QString s;
	switch (status) {
	case QQuickView::Null:
	s = tr("Null");
	break;
	case QQuickView::Ready:
	s = tr("Ready");
	break;
	case QQuickView::Loading:
	s = tr("Loading");
	break;
	case QQuickView::Error:
	s = tr("Error");
	break;
	default:
	s = tr("Unknown");
	break;
	}
	m_labelStatus->setText(tr("QQuickView status: %1").arg(s));
	}

	void MainWindow::onStatusChangedWidget(QQuickWidget::Status status)
	{
	QString s;
	switch (status) {
	case QQuickWidget::Null:
	s = tr("Null");
	break;
	case QQuickWidget::Ready:
	s = tr("Ready");
	break;
	case QQuickWidget::Loading:
	s = tr("Loading");
	break;
	case QQuickWidget::Error:
	s = tr("Error");
	break;
	default:
	s = tr("Unknown");
	break;
	}
	m_labelStatus->setText(tr("QQuickWidget status: %1").arg(s));
	}

	void MainWindow::onSceneGraphError(QQuickWindow::SceneGraphError error, const QString &message)
	{
	m_labelStatus->setText(tr("Scenegraph error %1: %2").arg(error).arg(message));
	}