e453484bca
QOpenGLWidget is now public. In addition Qt::WA_AlwaysStackOnTop is introduced to support the special case of semi-transparent QOpenGLWidget or QQuickWidget on top of regular widgets. hellogl_es2 becomes the qopenglwidget example. This example performs painting both via QPainter and native GL commands and has the OpenGL widget combined with other, normal widgets. The widget stack receives some changes when it comes to renderToTexture widgets like QQuickWidget and QOpenGLWidget. Calling update() will now result in a paint event, which is essential for QOpenGLWidget since we want it to behave like a regular widget. The dirty region handling is extended specially for such widgets due to performance reasons. (an OpenGL content update must not result in any backingstore painting, and is thus handled as a different kind of dirtiness) [ChangeLog] Added QOpenGLWidget. This widget serves as a replacement for QGLWidget. Task-number: QTBUG-36899 Task-number: QTBUG-40086 Change-Id: Ibf7f82fea99b39edfffd2fc088e7e0eadbca25cf Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
309 lines
13 KiB
C++
309 lines
13 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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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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** You may use this file under the terms of the BSD license 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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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
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** of its contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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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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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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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 "flippablepad.h"
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#include "padnavigator.h"
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#include "splashitem.h"
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#ifndef QT_NO_OPENGL
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#include <QtOpenGL>
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#else
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#include <QtWidgets>
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#endif
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//! [0]
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PadNavigator::PadNavigator(const QSize &size, QWidget *parent)
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: QGraphicsView(parent)
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{
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//! [0]
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//! [1]
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// Splash item
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SplashItem *splash = new SplashItem;
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splash->setZValue(1);
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//! [1]
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//! [2]
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// Pad item
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FlippablePad *pad = new FlippablePad(size);
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QGraphicsRotation *flipRotation = new QGraphicsRotation(pad);
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QGraphicsRotation *xRotation = new QGraphicsRotation(pad);
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QGraphicsRotation *yRotation = new QGraphicsRotation(pad);
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flipRotation->setAxis(Qt::YAxis);
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xRotation->setAxis(Qt::YAxis);
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yRotation->setAxis(Qt::XAxis);
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pad->setTransformations(QList<QGraphicsTransform *>()
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<< flipRotation
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<< xRotation << yRotation);
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//! [2]
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//! [3]
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// Back (proxy widget) item
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QGraphicsProxyWidget *backItem = new QGraphicsProxyWidget(pad);
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QWidget *widget = new QWidget;
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form.setupUi(widget);
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form.hostName->setFocus();
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backItem->setWidget(widget);
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backItem->setVisible(false);
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backItem->setFocus();
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backItem->setCacheMode(QGraphicsItem::ItemCoordinateCache);
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const QRectF r = backItem->rect();
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backItem->setTransform(QTransform()
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.rotate(180, Qt::YAxis)
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.translate(-r.width()/2, -r.height()/2));
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//! [3]
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//! [4]
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// Selection item
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RoundRectItem *selectionItem = new RoundRectItem(QRectF(-60, -60, 120, 120), Qt::gray, pad);
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selectionItem->setZValue(0.5);
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//! [4]
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//! [5]
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// Splash animations
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QPropertyAnimation *smoothSplashMove = new QPropertyAnimation(splash, "y");
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QPropertyAnimation *smoothSplashOpacity = new QPropertyAnimation(splash, "opacity");
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smoothSplashMove->setEasingCurve(QEasingCurve::InQuad);
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smoothSplashMove->setDuration(250);
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smoothSplashOpacity->setDuration(250);
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//! [5]
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//! [6]
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// Selection animation
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QPropertyAnimation *smoothXSelection = new QPropertyAnimation(selectionItem, "x");
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QPropertyAnimation *smoothYSelection = new QPropertyAnimation(selectionItem, "y");
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QPropertyAnimation *smoothXRotation = new QPropertyAnimation(xRotation, "angle");
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QPropertyAnimation *smoothYRotation = new QPropertyAnimation(yRotation, "angle");
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smoothXSelection->setDuration(125);
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smoothYSelection->setDuration(125);
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smoothXRotation->setDuration(125);
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smoothYRotation->setDuration(125);
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smoothXSelection->setEasingCurve(QEasingCurve::InOutQuad);
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smoothYSelection->setEasingCurve(QEasingCurve::InOutQuad);
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smoothXRotation->setEasingCurve(QEasingCurve::InOutQuad);
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smoothYRotation->setEasingCurve(QEasingCurve::InOutQuad);
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//! [6]
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//! [7]
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// Flip animation setup
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QPropertyAnimation *smoothFlipRotation = new QPropertyAnimation(flipRotation, "angle");
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QPropertyAnimation *smoothFlipScale = new QPropertyAnimation(pad, "scale");
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QPropertyAnimation *smoothFlipXRotation = new QPropertyAnimation(xRotation, "angle");
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QPropertyAnimation *smoothFlipYRotation = new QPropertyAnimation(yRotation, "angle");
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QParallelAnimationGroup *flipAnimation = new QParallelAnimationGroup(this);
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smoothFlipScale->setDuration(500);
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smoothFlipRotation->setDuration(500);
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smoothFlipXRotation->setDuration(500);
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smoothFlipYRotation->setDuration(500);
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smoothFlipScale->setEasingCurve(QEasingCurve::InOutQuad);
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smoothFlipRotation->setEasingCurve(QEasingCurve::InOutQuad);
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smoothFlipXRotation->setEasingCurve(QEasingCurve::InOutQuad);
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smoothFlipYRotation->setEasingCurve(QEasingCurve::InOutQuad);
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smoothFlipScale->setKeyValueAt(0, qvariant_cast<qreal>(1.0));
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smoothFlipScale->setKeyValueAt(0.5, qvariant_cast<qreal>(0.7));
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smoothFlipScale->setKeyValueAt(1, qvariant_cast<qreal>(1.0));
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flipAnimation->addAnimation(smoothFlipRotation);
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flipAnimation->addAnimation(smoothFlipScale);
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flipAnimation->addAnimation(smoothFlipXRotation);
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flipAnimation->addAnimation(smoothFlipYRotation);
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//! [7]
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//! [8]
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// Flip animation delayed property assignment
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QSequentialAnimationGroup *setVariablesSequence = new QSequentialAnimationGroup;
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QPropertyAnimation *setFillAnimation = new QPropertyAnimation(pad, "fill");
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QPropertyAnimation *setBackItemVisibleAnimation = new QPropertyAnimation(backItem, "visible");
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QPropertyAnimation *setSelectionItemVisibleAnimation = new QPropertyAnimation(selectionItem, "visible");
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setFillAnimation->setDuration(0);
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setBackItemVisibleAnimation->setDuration(0);
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setSelectionItemVisibleAnimation->setDuration(0);
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setVariablesSequence->addPause(250);
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setVariablesSequence->addAnimation(setBackItemVisibleAnimation);
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setVariablesSequence->addAnimation(setSelectionItemVisibleAnimation);
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setVariablesSequence->addAnimation(setFillAnimation);
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flipAnimation->addAnimation(setVariablesSequence);
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//! [8]
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//! [9]
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// Build the state machine
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QStateMachine *stateMachine = new QStateMachine(this);
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QState *splashState = new QState(stateMachine);
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QState *frontState = new QState(stateMachine);
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QHistoryState *historyState = new QHistoryState(frontState);
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QState *backState = new QState(stateMachine);
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//! [9]
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//! [10]
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frontState->assignProperty(pad, "fill", false);
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frontState->assignProperty(splash, "opacity", 0.0);
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frontState->assignProperty(backItem, "visible", false);
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frontState->assignProperty(flipRotation, "angle", qvariant_cast<qreal>(0.0));
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frontState->assignProperty(selectionItem, "visible", true);
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backState->assignProperty(pad, "fill", true);
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backState->assignProperty(backItem, "visible", true);
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backState->assignProperty(xRotation, "angle", qvariant_cast<qreal>(0.0));
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backState->assignProperty(yRotation, "angle", qvariant_cast<qreal>(0.0));
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backState->assignProperty(flipRotation, "angle", qvariant_cast<qreal>(180.0));
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backState->assignProperty(selectionItem, "visible", false);
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stateMachine->addDefaultAnimation(smoothXRotation);
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stateMachine->addDefaultAnimation(smoothYRotation);
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stateMachine->addDefaultAnimation(smoothXSelection);
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stateMachine->addDefaultAnimation(smoothYSelection);
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stateMachine->setInitialState(splashState);
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//! [10]
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//! [11]
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// Transitions
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QEventTransition *anyKeyTransition = new QEventTransition(this, QEvent::KeyPress, splashState);
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anyKeyTransition->setTargetState(frontState);
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anyKeyTransition->addAnimation(smoothSplashMove);
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anyKeyTransition->addAnimation(smoothSplashOpacity);
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//! [11]
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//! [12]
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QKeyEventTransition *enterTransition = new QKeyEventTransition(this, QEvent::KeyPress,
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Qt::Key_Enter, backState);
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QKeyEventTransition *returnTransition = new QKeyEventTransition(this, QEvent::KeyPress,
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Qt::Key_Return, backState);
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QKeyEventTransition *backEnterTransition = new QKeyEventTransition(this, QEvent::KeyPress,
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Qt::Key_Enter, frontState);
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QKeyEventTransition *backReturnTransition = new QKeyEventTransition(this, QEvent::KeyPress,
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Qt::Key_Return, frontState);
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enterTransition->setTargetState(historyState);
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returnTransition->setTargetState(historyState);
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backEnterTransition->setTargetState(backState);
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backReturnTransition->setTargetState(backState);
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enterTransition->addAnimation(flipAnimation);
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returnTransition->addAnimation(flipAnimation);
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backEnterTransition->addAnimation(flipAnimation);
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backReturnTransition->addAnimation(flipAnimation);
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//! [12]
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//! [13]
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// Create substates for each icon; store in temporary grid.
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int columns = size.width();
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int rows = size.height();
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QVector< QVector< QState * > > stateGrid;
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stateGrid.resize(rows);
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for (int y = 0; y < rows; ++y) {
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stateGrid[y].resize(columns);
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for (int x = 0; x < columns; ++x)
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stateGrid[y][x] = new QState(frontState);
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}
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frontState->setInitialState(stateGrid[0][0]);
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selectionItem->setPos(pad->iconAt(0, 0)->pos());
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//! [13]
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//! [14]
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// Enable key navigation using state transitions
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for (int y = 0; y < rows; ++y) {
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for (int x = 0; x < columns; ++x) {
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QState *state = stateGrid[y][x];
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QKeyEventTransition *rightTransition = new QKeyEventTransition(this, QEvent::KeyPress,
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Qt::Key_Right, state);
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QKeyEventTransition *leftTransition = new QKeyEventTransition(this, QEvent::KeyPress,
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Qt::Key_Left, state);
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QKeyEventTransition *downTransition = new QKeyEventTransition(this, QEvent::KeyPress,
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Qt::Key_Down, state);
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QKeyEventTransition *upTransition = new QKeyEventTransition(this, QEvent::KeyPress,
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Qt::Key_Up, state);
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rightTransition->setTargetState(stateGrid[y][(x + 1) % columns]);
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leftTransition->setTargetState(stateGrid[y][((x - 1) + columns) % columns]);
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downTransition->setTargetState(stateGrid[(y + 1) % rows][x]);
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upTransition->setTargetState(stateGrid[((y - 1) + rows) % rows][x]);
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//! [14]
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//! [15]
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RoundRectItem *icon = pad->iconAt(x, y);
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state->assignProperty(xRotation, "angle", -icon->x() / 6.0);
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state->assignProperty(yRotation, "angle", icon->y() / 6.0);
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state->assignProperty(selectionItem, "x", icon->x());
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state->assignProperty(selectionItem, "y", icon->y());
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frontState->assignProperty(icon, "visible", true);
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backState->assignProperty(icon, "visible", false);
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QPropertyAnimation *setIconVisibleAnimation = new QPropertyAnimation(icon, "visible");
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setIconVisibleAnimation->setDuration(0);
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setVariablesSequence->addAnimation(setIconVisibleAnimation);
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}
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}
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//! [15]
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//! [16]
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// Scene
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QGraphicsScene *scene = new QGraphicsScene(this);
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scene->setBackgroundBrush(QPixmap(":/images/blue_angle_swirl.jpg"));
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scene->setItemIndexMethod(QGraphicsScene::NoIndex);
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scene->addItem(pad);
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scene->setSceneRect(scene->itemsBoundingRect());
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setScene(scene);
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//! [16]
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//! [17]
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// Adjust splash item to scene contents
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const QRectF sbr = splash->boundingRect();
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splash->setPos(-sbr.width() / 2, scene->sceneRect().top() - 2);
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frontState->assignProperty(splash, "y", splash->y() - 100.0);
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scene->addItem(splash);
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//! [17]
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//! [18]
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// View
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setMinimumSize(50, 50);
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setViewportUpdateMode(FullViewportUpdate);
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setCacheMode(CacheBackground);
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setRenderHints(QPainter::Antialiasing
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| QPainter::SmoothPixmapTransform
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| QPainter::TextAntialiasing);
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#ifndef QT_NO_OPENGL
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setViewport(new QOpenGLWidget);
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#endif
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stateMachine->start();
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//! [18]
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}
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//! [19]
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void PadNavigator::resizeEvent(QResizeEvent *event)
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{
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QGraphicsView::resizeEvent(event);
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fitInView(scene()->sceneRect(), Qt::KeepAspectRatio);
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}
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//! [19]
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