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+/****************************************************************************
+**
+** 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 "flippablepad.h"
+#include "padnavigator.h"
+#include "splashitem.h"
+
+#include <QtGui/QtGui>
+#ifndef QT_NO_OPENGL
+#include <QtOpenGL/QtOpenGL>
+#endif
+
+//! [0]
+PadNavigator::PadNavigator(const QSize &size, QWidget *parent)
+ : QGraphicsView(parent)
+{
+//! [0]
+//! [1]
+ // Splash item
+ SplashItem *splash = new SplashItem;
+ splash->setZValue(1);
+//! [1]
+
+//! [2]
+ // Pad item
+ FlippablePad *pad = new FlippablePad(size);
+ QGraphicsRotation *flipRotation = new QGraphicsRotation(pad);
+ QGraphicsRotation *xRotation = new QGraphicsRotation(pad);
+ QGraphicsRotation *yRotation = new QGraphicsRotation(pad);
+ flipRotation->setAxis(Qt::YAxis);
+ xRotation->setAxis(Qt::YAxis);
+ yRotation->setAxis(Qt::XAxis);
+ pad->setTransformations(QList<QGraphicsTransform *>()
+ << flipRotation
+ << xRotation << yRotation);
+//! [2]
+
+//! [3]
+ // Back (proxy widget) item
+ QGraphicsProxyWidget *backItem = new QGraphicsProxyWidget(pad);
+ QWidget *widget = new QWidget;
+ form.setupUi(widget);
+ form.hostName->setFocus();
+ backItem->setWidget(widget);
+ backItem->setVisible(false);
+ backItem->setFocus();
+ backItem->setCacheMode(QGraphicsItem::ItemCoordinateCache);
+ const QRectF r = backItem->rect();
+ backItem->setTransform(QTransform()
+ .rotate(180, Qt::YAxis)
+ .translate(-r.width()/2, -r.height()/2));
+//! [3]
+
+//! [4]
+ // Selection item
+ RoundRectItem *selectionItem = new RoundRectItem(QRectF(-60, -60, 120, 120),
+ Qt::gray, pad);
+ selectionItem->setZValue(0.5);
+//! [4]
+
+//! [5]
+ // Splash animations
+ QPropertyAnimation *smoothSplashMove = new QPropertyAnimation(splash, "y");
+ QPropertyAnimation *smoothSplashOpacity = new QPropertyAnimation(splash, "opacity");
+ smoothSplashMove->setEasingCurve(QEasingCurve::InQuad);
+ smoothSplashMove->setDuration(250);
+ smoothSplashOpacity->setDuration(250);
+//! [5]
+
+//! [6]
+ // Selection animation
+ QPropertyAnimation *smoothXSelection = new QPropertyAnimation(selectionItem, "x");
+ QPropertyAnimation *smoothYSelection = new QPropertyAnimation(selectionItem, "y");
+ QPropertyAnimation *smoothXRotation = new QPropertyAnimation(xRotation, "angle");
+ QPropertyAnimation *smoothYRotation = new QPropertyAnimation(yRotation, "angle");
+ smoothXSelection->setDuration(125);
+ smoothYSelection->setDuration(125);
+ smoothXRotation->setDuration(125);
+ smoothYRotation->setDuration(125);
+ smoothXSelection->setEasingCurve(QEasingCurve::InOutQuad);
+ smoothYSelection->setEasingCurve(QEasingCurve::InOutQuad);
+ smoothXRotation->setEasingCurve(QEasingCurve::InOutQuad);
+ smoothYRotation->setEasingCurve(QEasingCurve::InOutQuad);
+//! [6]
+
+//! [7]
+ // Flip animation setup
+ QPropertyAnimation *smoothFlipRotation = new QPropertyAnimation(flipRotation, "angle");
+ QPropertyAnimation *smoothFlipScale = new QPropertyAnimation(pad, "scale");
+ QPropertyAnimation *smoothFlipXRotation = new QPropertyAnimation(xRotation, "angle");
+ QPropertyAnimation *smoothFlipYRotation = new QPropertyAnimation(yRotation, "angle");
+ QParallelAnimationGroup *flipAnimation = new QParallelAnimationGroup(this);
+ smoothFlipScale->setDuration(500);
+ smoothFlipRotation->setDuration(500);
+ smoothFlipXRotation->setDuration(500);
+ smoothFlipYRotation->setDuration(500);
+ smoothFlipScale->setEasingCurve(QEasingCurve::InOutQuad);
+ smoothFlipRotation->setEasingCurve(QEasingCurve::InOutQuad);
+ smoothFlipXRotation->setEasingCurve(QEasingCurve::InOutQuad);
+ smoothFlipYRotation->setEasingCurve(QEasingCurve::InOutQuad);
+ smoothFlipScale->setKeyValueAt(0, qvariant_cast<qreal>(1.0));
+ smoothFlipScale->setKeyValueAt(0.5, qvariant_cast<qreal>(0.7));
+ smoothFlipScale->setKeyValueAt(1, qvariant_cast<qreal>(1.0));
+ flipAnimation->addAnimation(smoothFlipRotation);
+ flipAnimation->addAnimation(smoothFlipScale);
+ flipAnimation->addAnimation(smoothFlipXRotation);
+ flipAnimation->addAnimation(smoothFlipYRotation);
+//! [7]
+
+//! [8]
+ // Flip animation delayed property assignment
+ QSequentialAnimationGroup *setVariablesSequence = new QSequentialAnimationGroup;
+ QPropertyAnimation *setFillAnimation = new QPropertyAnimation(pad, "fill");
+ QPropertyAnimation *setBackItemVisibleAnimation = new QPropertyAnimation(backItem, "visible");
+ QPropertyAnimation *setSelectionItemVisibleAnimation = new QPropertyAnimation(selectionItem, "visible");
+ setFillAnimation->setDuration(0);
+ setBackItemVisibleAnimation->setDuration(0);
+ setSelectionItemVisibleAnimation->setDuration(0);
+ setVariablesSequence->addPause(250);
+ setVariablesSequence->addAnimation(setBackItemVisibleAnimation);
+ setVariablesSequence->addAnimation(setSelectionItemVisibleAnimation);
+ setVariablesSequence->addAnimation(setFillAnimation);
+ flipAnimation->addAnimation(setVariablesSequence);
+//! [8]
+
+//! [9]
+ // Build the state machine
+ QStateMachine *stateMachine = new QStateMachine(this);
+ QState *splashState = new QState(stateMachine);
+ QState *frontState = new QState(stateMachine);
+ QHistoryState *historyState = new QHistoryState(frontState);
+ QState *backState = new QState(stateMachine);
+//! [9]
+//! [10]
+ frontState->assignProperty(pad, "fill", false);
+ frontState->assignProperty(splash, "opacity", 0.0);
+ frontState->assignProperty(backItem, "visible", false);
+ frontState->assignProperty(flipRotation, "angle", qvariant_cast<qreal>(0.0));
+ frontState->assignProperty(selectionItem, "visible", true);
+ backState->assignProperty(pad, "fill", true);
+ backState->assignProperty(backItem, "visible", true);
+ backState->assignProperty(xRotation, "angle", qvariant_cast<qreal>(0.0));
+ backState->assignProperty(yRotation, "angle", qvariant_cast<qreal>(0.0));
+ backState->assignProperty(flipRotation, "angle", qvariant_cast<qreal>(180.0));
+ backState->assignProperty(selectionItem, "visible", false);
+ stateMachine->addDefaultAnimation(smoothXRotation);
+ stateMachine->addDefaultAnimation(smoothYRotation);
+ stateMachine->addDefaultAnimation(smoothXSelection);
+ stateMachine->addDefaultAnimation(smoothYSelection);
+ stateMachine->setInitialState(splashState);
+//! [10]
+
+//! [11]
+ // Transitions
+ QEventTransition *anyKeyTransition = new QEventTransition(this, QEvent::KeyPress, splashState);
+ anyKeyTransition->setTargetState(frontState);
+ anyKeyTransition->addAnimation(smoothSplashMove);
+ anyKeyTransition->addAnimation(smoothSplashOpacity);
+//! [11]
+
+//! [12]
+ QKeyEventTransition *enterTransition = new QKeyEventTransition(this, QEvent::KeyPress,
+ Qt::Key_Enter, backState);
+ QKeyEventTransition *returnTransition = new QKeyEventTransition(this, QEvent::KeyPress,
+ Qt::Key_Return, backState);
+ QKeyEventTransition *backEnterTransition = new QKeyEventTransition(this, QEvent::KeyPress,
+ Qt::Key_Enter, frontState);
+ QKeyEventTransition *backReturnTransition = new QKeyEventTransition(this, QEvent::KeyPress,
+ Qt::Key_Return, frontState);
+ enterTransition->setTargetState(historyState);
+ returnTransition->setTargetState(historyState);
+ backEnterTransition->setTargetState(backState);
+ backReturnTransition->setTargetState(backState);
+ enterTransition->addAnimation(flipAnimation);
+ returnTransition->addAnimation(flipAnimation);
+ backEnterTransition->addAnimation(flipAnimation);
+ backReturnTransition->addAnimation(flipAnimation);
+//! [12]
+
+//! [13]
+ // Create substates for each icon; store in temporary grid.
+ int columns = size.width();
+ int rows = size.height();
+ QVector< QVector< QState * > > stateGrid;
+ stateGrid.resize(rows);
+ for (int y = 0; y < rows; ++y) {
+ stateGrid[y].resize(columns);
+ for (int x = 0; x < columns; ++x)
+ stateGrid[y][x] = new QState(frontState);
+ }
+ frontState->setInitialState(stateGrid[0][0]);
+ selectionItem->setPos(pad->iconAt(0, 0)->pos());
+//! [13]
+
+//! [14]
+ // Enable key navigation using state transitions
+ for (int y = 0; y < rows; ++y) {
+ for (int x = 0; x < columns; ++x) {
+ QState *state = stateGrid[y][x];
+ QKeyEventTransition *rightTransition = new QKeyEventTransition(this, QEvent::KeyPress,
+ Qt::Key_Right, state);
+ QKeyEventTransition *leftTransition = new QKeyEventTransition(this, QEvent::KeyPress,
+ Qt::Key_Left, state);
+ QKeyEventTransition *downTransition = new QKeyEventTransition(this, QEvent::KeyPress,
+ Qt::Key_Down, state);
+ QKeyEventTransition *upTransition = new QKeyEventTransition(this, QEvent::KeyPress,
+ Qt::Key_Up, state);
+ rightTransition->setTargetState(stateGrid[y][(x + 1) % columns]);
+ leftTransition->setTargetState(stateGrid[y][((x - 1) + columns) % columns]);
+ downTransition->setTargetState(stateGrid[(y + 1) % rows][x]);
+ upTransition->setTargetState(stateGrid[((y - 1) + rows) % rows][x]);
+//! [14]
+//! [15]
+ RoundRectItem *icon = pad->iconAt(x, y);
+ state->assignProperty(xRotation, "angle", -icon->x() / 6.0);
+ state->assignProperty(yRotation, "angle", icon->y() / 6.0);
+ state->assignProperty(selectionItem, "x", icon->x());
+ state->assignProperty(selectionItem, "y", icon->y());
+ frontState->assignProperty(icon, "visible", true);
+ backState->assignProperty(icon, "visible", false);
+
+ QPropertyAnimation *setIconVisibleAnimation = new QPropertyAnimation(icon, "visible");
+ setIconVisibleAnimation->setDuration(0);
+ setVariablesSequence->addAnimation(setIconVisibleAnimation);
+ }
+ }
+//! [15]
+
+//! [16]
+ // Scene
+ QGraphicsScene *scene = new QGraphicsScene(this);
+ scene->setBackgroundBrush(QPixmap(":/images/blue_angle_swirl.jpg"));
+ scene->setItemIndexMethod(QGraphicsScene::NoIndex);
+ scene->addItem(pad);
+ scene->setSceneRect(scene->itemsBoundingRect());
+ setScene(scene);
+//! [16]
+
+//! [17]
+ // Adjust splash item to scene contents
+ const QRectF sbr = splash->boundingRect();
+ splash->setPos(-sbr.width() / 2, scene->sceneRect().top() - 2);
+ frontState->assignProperty(splash, "y", splash->y() - 100.0);
+ scene->addItem(splash);
+//! [17]
+
+//! [18]
+ // View
+ setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+ setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+ setMinimumSize(50, 50);
+ setViewportUpdateMode(FullViewportUpdate);
+ setCacheMode(CacheBackground);
+ setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform | QPainter::TextAntialiasing);
+#ifndef QT_NO_OPENGL
+ setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
+#endif
+
+ stateMachine->start();
+//! [18]
+}
+
+//! [19]
+void PadNavigator::resizeEvent(QResizeEvent *event)
+{
+ QGraphicsView::resizeEvent(event);
+ fitInView(scene()->sceneRect(), Qt::KeepAspectRatio);
+}
+//! [19]
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