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Diffstat (limited to 'src/imports/threed/viewport.cpp')
| -rw-r--r-- | src/imports/threed/viewport.cpp | 1289 |
1 files changed, 0 insertions, 1289 deletions
diff --git a/src/imports/threed/viewport.cpp b/src/imports/threed/viewport.cpp deleted file mode 100644 index 5f4169e3..00000000 --- a/src/imports/threed/viewport.cpp +++ /dev/null @@ -1,1289 +0,0 @@ -/**************************************************************************** -** -** 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 QtQuick3D module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** This file may be used under the terms of the GNU Lesser General Public -** License version 2.1 as published by the Free Software Foundation and -** appearing in the file LICENSE.LGPL included in the packaging of this -** file. Please review the following information to ensure the GNU Lesser -** General Public License version 2.1 requirements will be met: -** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "viewport.h" -#include "qdeclarativeeffect.h" - -#include "qgllightmodel.h" -#include "qgllightparameters.h" -#include "qglcamera.h" -#include "qglview.h" -#include "qglsubsurface.h" -#include "qray3d.h" -#include "qglframebufferobjectsurface.h" -#include "skybox.h" - -#include <QtGui/qpainter.h> -#include <QtGui/qgraphicsview.h> -#include <QtGui/qgraphicsscene.h> -#include <QtGui/qgraphicssceneevent.h> -#include <QtGui/qevent.h> -#include <QtOpenGL/qglframebufferobject.h> -#include <QtCore/qtimer.h> -#include <QtCore/qcoreapplication.h> -#include <QtCore/qpointer.h> - -/*! - \qmlclass Viewport Viewport - \brief The Viewport item defines the logical viewport for a 3D scene. It includes all necessary - references and parameters for the contents of the scene, as well as drawing and painting functions - \since 4.8 - \ingroup qt3d::qml3d - - The Viewport item is usually the outermost in a 3D scene, specifying - the size of the view, the camera position, lights, and the main 3D object: - - \code - import QtQuick 1.0 - import Qt3D 1.0 - - Viewport { - width: 640; height: 480 - camera: Camera {} - light: Light {} - Item3D { - mesh: Mesh { source: "meshes/teapot.bez" } - effect: Effect {} - } - } - \endcode - - \sa Camera -*/ - -QT_BEGIN_NAMESPACE - -class ViewportPrivate -{ -public: - ViewportPrivate(); - ~ViewportPrivate(); - - bool picking; - bool showPicking; - bool showSceneGraph; - int dumpCount; - bool navigation; - bool fovzoom; - bool blending; - bool itemsInitialized; - bool needsPick; - QGLCamera *camera; - QGLLightParameters *light; - QGLLightModel *lightModel; - QWidget *viewWidget; - int pickId; - QGLFramebufferObject *pickFbo; - QMap<int, QObject *> objects; - QPointer<QObject> pressedObject; - Qt::MouseButton pressedButton; - QPointer<QObject> enteredObject; - bool panning; - QPointF startPan; - QPointF lastPan; - QVector3D startEye; - QVector3D startCenter; - QVector3D startUpVector; - Qt::KeyboardModifiers panModifiers; - QMap<int, QObject*> earlyDrawList; - - void setDefaults(QGLPainter *painter); -}; - -ViewportPrivate::ViewportPrivate() - : picking(false) - , showPicking(false) - , showSceneGraph(false) - , dumpCount(10) // maybe this needs to be higher? - , navigation(true) - , fovzoom(false) - , blending(false) - , itemsInitialized(false) - , needsPick(true) - , camera(0) - , light(0) - , lightModel(0) - , viewWidget(0) - , pickId(1) - , pickFbo(0) - , pressedObject(0) - , pressedButton(Qt::NoButton) - , enteredObject(0) - , panning(false) - , startPan(-1, -1) - , lastPan(-1, -1) - , panModifiers(Qt::NoModifier) -{ -} - -ViewportPrivate::~ViewportPrivate() -{ - delete pickFbo; -} - -void ViewportPrivate::setDefaults(QGLPainter *painter) -{ - // Set the default depth buffer options. - glDepthFunc(GL_LESS); - glDepthMask(GL_TRUE); -#if defined(QT_OPENGL_ES) - glDepthRangef(0.0f, 1.0f); -#else - glDepthRange(0.0f, 1.0f); -#endif - - // Set the default blend options. - glDisable(GL_BLEND); - if (painter->hasOpenGLFeature(QOpenGLFunctions::BlendColor)) - painter->glBlendColor(0, 0, 0, 0); - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); - if (painter->hasOpenGLFeature(QOpenGLFunctions::BlendEquation)) - painter->glBlendEquation(GL_FUNC_ADD); - else if (painter->hasOpenGLFeature(QOpenGLFunctions::BlendEquationSeparate)) - painter->glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD); -} - -/*! - \internal - Construct the class and assign it a \a parent QDeclarativeItem. -*/ -Viewport::Viewport(QDeclarativeItem *parent) - : QDeclarativeItem(parent) -{ - d = new ViewportPrivate(); - setFlag(QGraphicsItem::ItemHasNoContents, false); - - connect(this, SIGNAL(viewportChanged()), this, SLOT(update3d())); - - setCamera(new QGLCamera(this)); - setLight(new QGLLightParameters(this)); - - setAcceptedMouseButtons(Qt::LeftButton); - setAcceptHoverEvents(true); -} - -/*! - \internal - Class destruction and cleanup. -*/ -Viewport::~Viewport() -{ - delete d; -} - -/*! - \qmlproperty bool Viewport::picking - - User interaction in QML/3d is handled through the concept of object picking. Each - item has a unique picking id which is queried for a given screen click position when the - mouse is clicked. - - If this property is set to true, picking will be supported for this - viewport, while if the property is false, no picking will be applied. - - The default value for this property is false. - - \sa showPicking -*/ -bool Viewport::picking() const -{ - return d->picking; -} - -void Viewport::setPicking(bool value) -{ - d->picking = value; - emit viewportChanged(); -} - -/*! - \qmlproperty bool Viewport::showPicking - The underlying mechanism for picking is based on painting an off-screen buffer with a flat - coloured image containing all of the objects with a unique color value. - - Setting this property to true will display this flat-colour picking - representation in the viewport, which can be useful for debugging - problems with object selection. - - The default value for this property is false. - - \sa picking -*/ - -bool Viewport::showPicking() const -{ - return d->showPicking; -} - -void Viewport::setShowPicking(bool value) -{ - d->showPicking = value; - emit viewportChanged(); -} - -/*! - \qmlproperty bool Viewport::showSceneGraph - - This property controls whether or not the 3D scenegraph structure is dumped - to the console when the viewport is first rendered. Studying the output can be very - useful for optimising the scene, and for detecting issues with rendering, such - as misplaced textures, materials, geometry and so on. - - By default the value is set to false. -*/ -bool Viewport::showSceneGraph() const -{ - return d->showSceneGraph; -} - -void Viewport::setShowSceneGraph(bool show) -{ - if (show != d->showSceneGraph) - { - d->showSceneGraph = show; - emit showSceneGraphChanged(); - } -} - -/*! - \qmlproperty bool Viewport::navigation - - This property is used to set or unset camera navigation in for the viewport. - Camera navigation allows the user to move the camera position around using the mouse. - - By default, camera navigation is set to true. -*/ -bool Viewport::navigation() const -{ - return d->navigation; -} - -void Viewport::setNavigation(bool value) -{ - d->navigation = value; - emit viewportChanged(); -} - -/*! - \qmlproperty bool Viewport::fovzoom - - This property is used to set or unset zooming based on field-of-view (fov). Normally - zooming is achieved by moving the camera physically closer to the target object. This - options achieves zooming by narrowing or broadening the fov. - - By default, fov zooming is set to false. -*/ -bool Viewport::fovzoom() const -{ - return d->fovzoom; -} - -void Viewport::setFovzoom(bool value) -{ - d->fovzoom = value; - emit viewportChanged(); -} - - -/*! - \qmlproperty bool Viewport::blending - - The blending property is used to enable or disable GL_BLEND - on the viewport, for alpha blending of drawn objects. - - By default, blending is set to false. - - \sa Effect::blending -*/ -bool Viewport::blending() const -{ - return d->blending; -} - -void Viewport::setBlending(bool value) -{ - d->blending = value; - emit viewportChanged(); -} - -/*! - \qmlproperty Camera Viewport::camera - - This property sets the camera parameters which will be used for - the appropriate viewing transforms in OpenGL. The default is - a perspective camera with its eye located at (0, 0, 10) looking - at the center (0, 0, 0), with the y axis as up. -*/ -QGLCamera *Viewport::camera() const -{ - return d->camera; -} - -void Viewport::setCamera(QGLCamera *value) -{ - if (d->camera != value) { - if (d->camera) { - disconnect(d->camera, SIGNAL(projectionChanged()), - this, SLOT(cameraChanged())); - disconnect(d->camera, SIGNAL(viewChanged()), - this, SLOT(cameraChanged())); - } - d->camera = value; - if (d->camera) { - connect(d->camera, SIGNAL(projectionChanged()), - this, SLOT(cameraChanged())); - connect(d->camera, SIGNAL(viewChanged()), - this, SLOT(cameraChanged())); - } - cameraChanged(); - } -} - -/*! - \qmlproperty Light Viewport::light - - This property defines the main scene light to use for 3D items - that are drawn in this viewport. - - \sa lightModel -*/ - -QGLLightParameters *Viewport::light() const -{ - return d->light; -} - -void Viewport::setLight(QGLLightParameters *value) -{ - if (d->light != value) { - if (d->light) { - disconnect(d->light, SIGNAL(lightChanged()), - this, SLOT(update3d())); - } - d->light = value; - if (d->light) { - connect(d->light, SIGNAL(lightChanged()), - this, SLOT(update3d())); - } - emit viewportChanged(); - } -} - -/*! - \qmlproperty LightModel Viewport::lightModel - The user is able to set a lighting model for the 3d environment through the use of the - lightModel property. By default the light model is undefined. - - \sa light -*/ -QGLLightModel *Viewport::lightModel() const -{ - return d->lightModel; -} - -void Viewport::setLightModel(QGLLightModel *value) -{ - if (d->lightModel != value) { - if (d->lightModel) { - disconnect(d->lightModel, SIGNAL(lightModelChanged()), - this, SLOT(update3d())); - } - d->lightModel = value; - if (d->lightModel) { - connect(d->lightModel, SIGNAL(lightModelChanged()), - this, SLOT(update3d())); - } - emit viewportChanged(); - } -} - -class ViewportSubsurface : public QGLSubsurface -{ -public: - ViewportSubsurface(QGLAbstractSurface *surface, const QRect ®ion, - qreal adjust) - : QGLSubsurface(surface, region), m_adjust(adjust) {} - - qreal aspectRatio() const; - -private: - qreal m_adjust; -}; - -qreal ViewportSubsurface::aspectRatio() const -{ - return QGLSubsurface::aspectRatio() * m_adjust; -} - -/*! - \internal - The main paint function for the Viewport class. It takes a QPainter \a p, which performs the - painting of objects in the 3d environment. - - The paint function is responsible for setting up the viewing transform, as well as other display - options, before calling the draw function to perform the actual drawing of the scene. - - Note, currently \a style and \a widget are unused, but are reserved for later development. -*/ -void Viewport::paint(QPainter *p, const QStyleOptionGraphicsItem * style, QWidget *widget) -{ - Q_UNUSED(style); - - if (!d->viewWidget) - d->viewWidget = widget; - d->needsPick = true; - - QGLPainter painter; - if (!painter.begin(p)) { - if (widget) { - // Probably running with a plain QDeclarativeView (e.g. qmlviewer). - // We need to have switched the surrounding QGraphicsView to use a - // QGLWidget as its viewport. - QGraphicsView *view = - qobject_cast<QGraphicsView *>(widget->parentWidget()); - if (!view) { - return; - } else { - QGLWidget *glw = qobject_cast<QGLWidget *>(view->viewport()); - if (!glw) { - qWarning("GL graphics system is not active; cannot use 3D items"); - return; - } - } - } - } - - // Initialize the objects in the scene if this is the first paint. - if (!d->itemsInitialized) - initializeGL(&painter); - - painter.setEye(QGL::NoEye); - qreal adjust = 1.0f; - - // Modify the GL viewport to only cover the extent of this QDeclarativeItem. - QTransform transform = p->combinedTransform(); - QRect viewport = transform.mapRect(boundingRect()).toRect(); - ViewportSubsurface surface(painter.currentSurface(), viewport, adjust); - painter.pushSurface(&surface); - - // Perform early drawing operations. - earlyDraw(&painter); - - // Set up the camera the way QGLView would if we were using it. - if (d->camera) { - painter.setCamera(d->camera); - } else { - QGLCamera defCamera; - painter.setCamera(&defCamera); - } - - // Draw the Item3D children. - painter.setPicking(d->showPicking); - draw(&painter); - painter.setPicking(false); - painter.popSurface(); - - // Disable the effect to return control to the GL paint engine. - painter.disableEffect(); - - // Try to restore the GL state to something paint-engine compatible. - glDisable(GL_CULL_FACE); - d->setDefaults(&painter); - glDisable(GL_DEPTH_TEST); - -} - -/*! - \internal -*/ -void Viewport::earlyDraw(QGLPainter *painter) -{ - // If we have a parent, then assume that the parent has painted - // the background and overpaint over the top of it. If we don't - // have a parent, then clear to black. - if (parentItem()) { - glClear(GL_DEPTH_BUFFER_BIT); - } else { - painter->setClearColor(Qt::black); - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - } - - // Force the effect to be updated. The GL paint engine - // has left the GL state in an unknown condition. - painter->disableEffect(); - -#ifdef GL_RESCALE_NORMAL - glEnable(GL_RESCALE_NORMAL); -#endif - - // Set the default effect for the scene. - painter->setStandardEffect(QGL::LitMaterial); - painter->setFaceColor(QGL::AllFaces, Qt::white); -} - -/*! - \internal - The draw function for the viewport sets up all of the lighting parameters for the scene before - iterating through the top level items in the scene and drawing them using \a painter. - - As a matter of course each item will draw its child items, and so on, until the entire image has - been populated. -*/ -void Viewport::draw(QGLPainter *painter) -{ - // Set up the initial depth, blend, and other options. - glEnable(GL_DEPTH_TEST); - glDepthFunc(GL_LESS); - glDepthMask(GL_TRUE); -#if defined(QT_OPENGL_ES) - glDepthRangef(0.0f, 1.0f); -#else - glDepthRange(0.0f, 1.0f); -#endif - - // At present only skyboxes work, with early draw and they are drawn - // without blending and without a lighting model - just flat texture rendering - int cnt = d->earlyDrawList.size(); - int order = 0; - while (cnt) - { - QMap<int, QObject *>::const_iterator it = d->earlyDrawList.constFind(order); - while (it != d->earlyDrawList.constEnd()) - { - // TODO: make more than just skybox work with early draw - Skybox *sb = qobject_cast<Skybox *>(*it); - if (sb) - sb->draw(painter); - ++it; - --cnt; - } - ++order; - } - - if (d->blending) - glEnable(GL_BLEND); - else - glDisable(GL_BLEND); - if (painter->hasOpenGLFeature(QOpenGLFunctions::BlendColor)) - painter->glBlendColor(0, 0, 0, 0); - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); - if (painter->hasOpenGLFeature(QOpenGLFunctions::BlendEquation)) - painter->glBlendEquation(GL_FUNC_ADD); - else if (painter->hasOpenGLFeature(QOpenGLFunctions::BlendEquationSeparate)) - painter->glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD); - glDisable(GL_CULL_FACE); - - painter->setObjectPickId(-1); - QObjectList list = QObject::children(); - painter->setMainLight(d->light, QMatrix4x4()); - painter->setLightModel(d->lightModel); - foreach (QObject *child, list) { - QDeclarativeItem3D *item = qobject_cast<QDeclarativeItem3D *>(child); - if (item) - { - if (d->showSceneGraph && (d->dumpCount == 0)) - qDumpItem(item); - item->draw(painter); - } - } - if (d->dumpCount >= 0) - --d->dumpCount; -} - -/*! - \internal - Initialize the GL viewport for the first time on \a painter. -*/ - -void Viewport::initializeGL(QGLPainter *painter) -{ - // Initialize the Item3D objects attached to this scene. - QObjectList list = QObject::children(); - foreach (QObject *child, list) { - QDeclarativeItem3D *item = qobject_cast<QDeclarativeItem3D *>(child); - if (item) { - setItemViewport(item); - item->initialize(painter); - } - // TODO: make this more generic with some sort of abstract interface - // so that more than just skybox works with early draw - Skybox *sb = qobject_cast<Skybox *>(child); - if (sb) - { - sb->setViewport(this); - registerEarlyDrawObject(sb, 0); - } - } - d->itemsInitialized = true; -} - -/*! - \internal - Registers \a obj with this viewport as a pickable object and - return its pick identifier. -*/ -int Viewport::registerPickableObject(QObject *obj) -{ - int id = (d->pickId)++; - d->objects[id] = obj; - return id; -} - -void Viewport::registerEarlyDrawObject(QObject *obj, int order) -{ - d->earlyDrawList.insertMulti(order, obj); -} - -/*! - \internal - Returns the registered object that is under the mouse position - specified by (\a x, \a y). This function may need to regenerate - the contents of the pick buffer by repainting the scene. -*/ -QObject *Viewport::objectForPoint(qreal x, qreal y) -{ - if (!d->viewWidget) - return 0; - - // Check the viewport boundaries in case a mouse move has - // moved the pointer outside the window. - QRectF rect = boundingRect(); - if (!rect.contains(QPointF(x, y))) - return 0; - - QPainter qpainter; - QGLPainter painter; - QGLWidget *glw = qobject_cast<QGLWidget *>(d->viewWidget); - bool painterValid = false; - bool doubleBuffer = false; - if (glw && painter.begin(glw)) { - doubleBuffer = glw->doubleBuffer(); - painterValid = true; - } else if (qpainter.begin(d->viewWidget) && painter.begin(&qpainter)) { - painterValid = true; - } - - if (!painterValid && !QGLContext::currentContext()) { - // Won't be able to read or generate a pick buffer, so bail out. - return 0; - } - - int objectId = -1; - - QSize size(qRound(width()), qRound(height())); - QSize fbosize(QGL::nextPowerOfTwo(size)); - if (!d->needsPick && d->pickFbo && d->pickFbo->size() == fbosize - && painterValid) { - // The previous pick fbo contents should still be valid. - d->pickFbo->bind(); - objectId = painter.pickObject(qRound(x), fbosize.height() - 1 - qRound(y)); - d->pickFbo->release(); - } else { - // Regenerate the pick fbo contents. - QGLAbstractSurface *mainSurface = 0; - QGLAbstractSurface *fboSurface = 0; - int height; - if (!doubleBuffer) { - if (d->pickFbo && d->pickFbo->size() != fbosize) { - delete d->pickFbo; - d->pickFbo = 0; - } - if (!d->pickFbo) { - d->pickFbo = new QGLFramebufferObject - (fbosize, QGLFramebufferObject::CombinedDepthStencil); - } - height = fbosize.height(); - fboSurface = new QGLFramebufferObjectSurface(d->pickFbo); - mainSurface = fboSurface; - } else if (painterValid) { - // Use the QGLWidget's back buffer for picking to avoid the - // need to create a separate fbo in GPU memory. - mainSurface = painter.currentSurface(); - height = mainSurface->viewportGL().height(); - } - QGLSubsurface surface(mainSurface, QRect(QPoint(0, 0), size)); - // If our view is a hijacked QWidget, we're going to have failed - // to find a QGLWidget, but we'll still have a QGLContext and be able - // to draw the pick buffer into the pickFbo. - if (painterValid || painter.begin(&surface)) { - if (painterValid) - painter.pushSurface(&surface); - painter.setPicking(true); - painter.clearPickObjects(); - painter.setClearColor(Qt::black); - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - painter.setEye(QGL::NoEye); - glEnable(GL_DEPTH_TEST); - glDepthFunc(GL_LESS); - glDepthMask(GL_TRUE); -#if defined(QT_OPENGL_ES) - glDepthRangef(0.0f, 1.0f); -#else - glDepthRange(0.0f, 1.0f); -#endif - glDisable(GL_BLEND); - if (painter.hasOpenGLFeature(QOpenGLFunctions::BlendColor)) - painter.glBlendColor(0, 0, 0, 0); - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); - if (painter.hasOpenGLFeature(QOpenGLFunctions::BlendEquation)) - painter.glBlendEquation(GL_FUNC_ADD); - else if (painter.hasOpenGLFeature(QOpenGLFunctions::BlendEquationSeparate)) - painter.glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD); - glDisable(GL_CULL_FACE); - if (d->camera) { - painter.setCamera(d->camera); - } else { - QGLCamera defCamera; - painter.setCamera(&defCamera); - } - draw(&painter); - painter.setPicking(false); - objectId = painter.pickObject(qRound(x), height - 1 - qRound(y)); - painter.popSurface(); - painter.end(); - } - delete fboSurface; - } - - d->needsPick = doubleBuffer; - return d->objects.value(objectId, 0); -} - -/*! - \internal -*/ -void Viewport::update3d() -{ - update(); -} - -/*! - \internal -*/ -void Viewport::cameraChanged() -{ - update(); -} - -static inline void sendEnterEvent(QObject *object) -{ - QEvent event(QEvent::Enter); - QCoreApplication::sendEvent(object, &event); -} - -static inline void sendLeaveEvent(QObject *object) -{ - QEvent event(QEvent::Leave); - QCoreApplication::sendEvent(object, &event); -} - -/*! - \internal -*/ -void Viewport::mousePressEvent(QGraphicsSceneMouseEvent *e) -{ - QObject *object; - if (!d->panning && d->picking) - object = objectForPoint(e->pos()); - else - object = 0; - if (d->pressedObject) { - // Send the press event to the pressed object. Use a position - // of (0, 0) if the mouse is still within the pressed object, - // or (-1, -1) if the mouse is no longer within the pressed object. - QMouseEvent event - (QEvent::MouseButtonPress, - (d->pressedObject == object) ? QPoint(0, 0) : QPoint(-1, -1), - e->screenPos(), e->button(), e->buttons(), e->modifiers()); - QCoreApplication::sendEvent(d->pressedObject, &event); - } else if (object) { - // Record the object that was pressed and forward the event. - d->pressedObject = object; - d->enteredObject = 0; - d->pressedButton = e->button(); - - // Send a mouse press event for (0, 0). - QMouseEvent event(QEvent::MouseButtonPress, QPoint(0, 0), - e->screenPos(), e->button(), e->buttons(), - e->modifiers()); - QCoreApplication::sendEvent(object, &event); - } else if (d->navigation && e->button() == Qt::LeftButton) { - d->panning = true; - d->lastPan = d->startPan = e->pos(); - d->startEye = d->camera->eye(); - d->startCenter = d->camera->center(); - d->startUpVector = d->camera->upVector(); - d->panModifiers = e->modifiers(); -#ifndef QT_NO_CURSOR - setCursor(Qt::ClosedHandCursor); -#endif - } else { - QDeclarativeItem::mousePressEvent(e); - return; - } - e->setAccepted(true); -} - -/*! - \internal -*/ -void Viewport::mouseReleaseEvent(QGraphicsSceneMouseEvent *e) -{ - if (d->panning && e->button() == Qt::LeftButton) { - d->panning = false; -#ifndef QT_NO_CURSOR - unsetCursor(); -#endif - } - if (d->pressedObject) { - // Notify the previously pressed object about the release. - QObject *object = objectForPoint(e->pos()); - QObject *pressed = d->pressedObject; - if (e->button() == d->pressedButton) { - d->pressedObject = 0; - d->pressedButton = Qt::NoButton; - d->enteredObject = object; - - // Send the release event to the pressed object. Use a position - // of (0, 0) if the mouse is still within the pressed object, - // or (-1, -1) if the mouse is no longer within the pressed object. - QMouseEvent event - (QEvent::MouseButtonRelease, - (pressed == object) ? QPoint(0, 0) : QPoint(-1, -1), - e->screenPos(), e->button(), e->buttons(), e->modifiers()); - QCoreApplication::sendEvent(pressed, &event); - - // Send leave and enter events if necessary. - if (object != pressed) { - sendLeaveEvent(pressed); - if (object) - sendEnterEvent(object); - } - } else { - // Some other button than the original was released. - // Forward the event to the pressed object. - QMouseEvent event - (QEvent::MouseButtonRelease, - (pressed == object) ? QPoint(0, 0) : QPoint(-1, -1), - e->screenPos(), e->button(), e->buttons(), e->modifiers()); - QCoreApplication::sendEvent(pressed, &event); - } - e->setAccepted(true); - } else { - QDeclarativeItem::mouseReleaseEvent(e); - } -} - -/*! - \internal -*/ -void Viewport::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *e) -{ - if (d->picking) { - QObject *object = objectForPoint(e->pos()); - if (object) { - // Simulate a double click event for (0, 0). - QMouseEvent event - (QEvent::MouseButtonDblClick, QPoint(0, 0), - e->screenPos(), e->button(), e->buttons(), e->modifiers()); - QCoreApplication::sendEvent(object, &event); - e->setAccepted(true); - return; - } - } - QDeclarativeItem::mouseDoubleClickEvent(e); -} - -/*! - \internal -*/ -void Viewport::mouseMoveEvent(QGraphicsSceneMouseEvent *e) -{ - if (d->panning) { - QPointF delta = e->pos() - d->startPan; - if (e->modifiers() == d->panModifiers) { - d->camera->setEye(d->startEye); - d->camera->setCenter(d->startCenter); - d->camera->setUpVector(d->startUpVector); - } else { - d->startPan = d->lastPan; - delta = e->pos() - d->startPan; - d->startEye = d->camera->eye(); - d->startCenter = d->camera->center(); - d->startUpVector = d->camera->upVector(); - d->panModifiers = e->modifiers(); - } - d->lastPan = e->pos(); - if ((e->modifiers() & Qt::ControlModifier) != 0) - wheel(delta.y() * -60); - else if ((e->modifiers() & Qt::ShiftModifier) != 0) - pan(delta.x(), delta.y()); - else - rotate(delta.x(), delta.y()); - } else if (d->picking) { - QObject *object = objectForPoint(e->pos()); - if (d->pressedObject) { - // Send the move event to the pressed object. Use a position - // of (0, 0) if the mouse is still within the pressed object, - // or (-1, -1) if the mouse is no longer within the pressed object. - QMouseEvent event - (QEvent::MouseMove, - (d->pressedObject == object) ? QPoint(0, 0) : QPoint(-1, -1), - e->screenPos(), e->button(), e->buttons(), e->modifiers()); - QCoreApplication::sendEvent(d->pressedObject, &event); - } else if (object) { - if (object != d->enteredObject) { - if (d->enteredObject) - sendLeaveEvent(d->enteredObject); - d->enteredObject = object; - sendEnterEvent(d->enteredObject); - } - QMouseEvent event - (QEvent::MouseMove, QPoint(0, 0), - e->screenPos(), e->button(), e->buttons(), e->modifiers()); - QCoreApplication::sendEvent(object, &event); - } else if (d->enteredObject) { - sendLeaveEvent(d->enteredObject); - d->enteredObject = 0; - } else { - QDeclarativeItem::mouseMoveEvent(e); - return; - } - } else { - QDeclarativeItem::mouseMoveEvent(e); - return; - } - e->setAccepted(true); -} - -/*! - \internal -*/ -void Viewport::hoverEnterEvent(QGraphicsSceneHoverEvent *e) -{ - if (hoverEvent(e)) - e->setAccepted(true); - else - QDeclarativeItem::hoverEnterEvent(e); -} - -/*! - \internal -*/ -void Viewport::hoverMoveEvent(QGraphicsSceneHoverEvent *e) -{ - if (hoverEvent(e)) - e->setAccepted(true); - else - QDeclarativeItem::hoverMoveEvent(e); -} - -/*! - \internal -*/ -void Viewport::hoverLeaveEvent(QGraphicsSceneHoverEvent *e) -{ - if (!d->pressedObject && d->enteredObject) { - sendLeaveEvent(d->enteredObject); - d->enteredObject = 0; - e->setAccepted(true); - } else { - QDeclarativeItem::hoverLeaveEvent(e); - } -} - -/*! - \internal -*/ -void Viewport::wheelEvent(QGraphicsSceneWheelEvent *e) -{ - if (d->navigation) { - wheel(e->delta()); - e->setAccepted(true); - } else { - QDeclarativeItem::wheelEvent(e); - } -} - -/*! - \internal -*/ -void Viewport::keyPressEvent(QKeyEvent *e) -{ - // Process the "Keys" property on the item first. - keyPressPreHandler(e); - if (e->isAccepted()) - return; - - qreal sep; - - if (!d->navigation) { - QDeclarativeItem::keyPressEvent(e); - return; - } - - switch (e->key()) { - - case Qt::Key_Left: - { - if ((e->modifiers() & Qt::ShiftModifier) != 0) { - pan(-10, 0); - } else if ((e->modifiers() & Qt::ControlModifier) != 0) { - sep = d->camera->eyeSeparation(); - sep -= (sep / 10.0f); - if (sep < 0.0f) - sep = 0.0f; - d->camera->setEyeSeparation(sep); - } else { - rotate(-10, 0); - } - } - break; - - case Qt::Key_Right: - { - if ((e->modifiers() & Qt::ShiftModifier) != 0) { - pan(10, 0); - } else if ((e->modifiers() & Qt::ControlModifier) != 0) { - sep = d->camera->eyeSeparation(); - sep += (sep / 10.0f); - d->camera->setEyeSeparation(sep); - } else { - rotate(10, 0); - } - } - break; - - case Qt::Key_Up: - { - if ((e->modifiers() & Qt::ControlModifier) != 0) - wheel(120); - else if ((e->modifiers() & Qt::ShiftModifier) != 0) - pan(0, -10); - else - rotate(0, -10); - } - break; - - case Qt::Key_Down: - { - if ((e->modifiers() & Qt::ControlModifier) != 0) - wheel(-120); - else if ((e->modifiers() & Qt::ShiftModifier) != 0) - pan(0, 10); - else - rotate(0, 10); - } - break; - - default: - QDeclarativeItem::keyPressEvent(e); - return; - } - - e->setAccepted(true); -} - -/*! - \internal -*/ -bool Viewport::hoverEvent(QGraphicsSceneHoverEvent *e) -{ - if (!d->panning && d->picking) { - QObject *object = objectForPoint(e->pos()); - if (d->pressedObject) { - // Send the move event to the pressed object. Use a position - // of (0, 0) if the mouse is still within the pressed object, - // or (-1, -1) if the mouse is no longer within the pressed object. - QMouseEvent event - (QEvent::MouseMove, - (d->pressedObject == object) ? QPoint(0, 0) : QPoint(-1, -1), - e->screenPos(), Qt::NoButton, Qt::NoButton, e->modifiers()); - QCoreApplication::sendEvent(d->pressedObject, &event); - } else if (object) { - if (object != d->enteredObject) { - if (d->enteredObject) - sendLeaveEvent(d->enteredObject); - d->enteredObject = object; - sendEnterEvent(d->enteredObject); - } - QMouseEvent event - (QEvent::MouseMove, QPoint(0, 0), - e->screenPos(), Qt::NoButton, Qt::NoButton, e->modifiers()); - QCoreApplication::sendEvent(object, &event); - } else if (d->enteredObject) { - sendLeaveEvent(d->enteredObject); - d->enteredObject = 0; - } - return true; - } - return false; -} - -// Zoom in and out according to the change in wheel delta. -void Viewport::wheel(qreal delta) -{ - if (d->fovzoom) { - //Use field-of view as zoom (much like a traditional camera) - qreal scale = qAbs(viewDelta(delta, delta).x()); - if (delta < 0) - scale = -scale; - if (scale >= 0.0f) - scale += 1.0f; - else - scale = 1.0f / (1.0f - scale); - qreal fov = d->camera->fieldOfView(); - if (fov != 0.0f) - d->camera->setFieldOfView(d->camera->fieldOfView() / scale); - else - d->camera->setViewSize(d->camera->viewSize() / scale); - } else { - // enable this to get wheel navigation that actually zooms by moving the - // camera back, as opposed to making the angle of view wider. - QVector3D viewVector= camera()->eye() - camera()->center(); - qreal zoomMag = viewVector.length(); - qreal zoomIncrement = -float(delta) / 100.0f; - if (!qFuzzyIsNull(zoomIncrement)) - { - zoomMag += zoomIncrement; - if (zoomMag < 1.0f) - zoomMag = 1.0f; - - QRay3D viewLine(camera()->center(), viewVector.normalized()); - camera()->setEye(viewLine.point(zoomMag)); - } - } -} - -// Pan left/right/up/down without rotating about the object. -void Viewport::pan(qreal deltax, qreal deltay) -{ - QPointF delta = viewDelta(deltax, deltay); - QVector3D t = d->camera->translation(delta.x(), -delta.y(), 0.0f); - - // Technically panning the eye left should make the object appear to - // move off to the right, but this looks weird on-screen where the user - // actually thinks they are picking up the object and dragging it rather - // than moving the eye. We therefore apply the inverse of the translation - // to make it "look right". - d->camera->setEye(d->camera->eye() - t); - d->camera->setCenter(d->camera->center() - t); -} - -// Rotate about the object being viewed. -void Viewport::rotate(qreal deltax, qreal deltay) -{ - QRectF rect = boundingRect(); - int rotation = d->camera->screenRotation(); - if (rotation == 90 || rotation == 270) { - qSwap(deltax, deltay); - } - if (rotation == 90 || rotation == 180) { - deltax = -deltax; - } - if (rotation == 180 || rotation == 270) { - deltay = -deltay; - } - qreal anglex = deltax * 90.0f / rect.width(); - qreal angley = deltay * 90.0f / rect.height(); - QQuaternion q = d->camera->pan(-anglex); - q *= d->camera->tilt(-angley); - d->camera->rotateCenter(q); -} - -// Convert deltas in the X and Y directions into percentages of -// the view width and height. -QPointF Viewport::viewDelta(qreal deltax, qreal deltay) -{ - QRectF rect = boundingRect(); - qreal w = rect.width(); - qreal h = rect.height(); - bool scaleToWidth; - qreal scaleFactor, scaleX, scaleY; - QSizeF viewSize = d->camera->viewSize(); - if (w >= h) { - if (viewSize.width() >= viewSize.height()) - scaleToWidth = true; - else - scaleToWidth = false; - } else { - if (viewSize.width() >= viewSize.height()) - scaleToWidth = false; - else - scaleToWidth = true; - } - int rotation = d->camera->screenRotation(); - if (rotation == 90 || rotation == 270) { - scaleToWidth = !scaleToWidth; - qSwap(deltax, deltay); - } - if (rotation == 90 || rotation == 180) { - deltax = -deltax; - } - if (rotation == 180 || rotation == 270) { - deltay = -deltay; - } - if (scaleToWidth) { - scaleFactor = 2.0f / viewSize.width(); - scaleX = scaleFactor * h / w; - scaleY = scaleFactor; - } else { - scaleFactor = 2.0f / viewSize.height(); - scaleX = scaleFactor; - scaleY = scaleFactor * w / h; - } - return QPointF(deltax * scaleX / w, deltay * scaleY / h); -} - -QVariant Viewport::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant &value) -{ - if (change == QGraphicsItem::ItemChildAddedChange) - { - QGraphicsItem *newItem = value.value<QGraphicsItem*>(); - if (QDeclarativeItem3D* item3d = - qobject_cast<QDeclarativeItem3D*>(newItem)) - { - setItemViewport(item3d); - } - }; - return QGraphicsItem::itemChange(change, value); -} -QT_END_NAMESPACE |