/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtDeclarative 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 "qquickcanvas.h" #include "qquickcanvas_p.h" #include "qquickitem.h" #include "qquickitem_p.h" #include #include #include #include #include #include #include #include #include #include #include #include QT_BEGIN_NAMESPACE #define QQUICK_CANVAS_TIMING #ifdef QQUICK_CANVAS_TIMING static bool qquick_canvas_timing = !qgetenv("QML_CANVAS_TIMING").isEmpty(); static QTime threadTimer; static int syncTime; static int renderTime; static int swapTime; #endif DEFINE_BOOL_CONFIG_OPTION(qmlFixedAnimationStep, QML_FIXED_ANIMATION_STEP) DEFINE_BOOL_CONFIG_OPTION(qmlNoThreadedRenderer, QML_BAD_GUI_RENDER_LOOP) extern Q_GUI_EXPORT QImage qt_gl_read_framebuffer(const QSize &size, bool alpha_format, bool include_alpha); void QQuickCanvasPrivate::updateFocusItemTransform() { Q_Q(QQuickCanvas); QQuickItem *focus = q->activeFocusItem(); if (focus && qApp->inputPanel()->inputItem() == focus) qApp->inputPanel()->setInputItemTransform(QQuickItemPrivate::get(focus)->itemToCanvasTransform()); } class QQuickCanvasIncubationController : public QObject, public QDeclarativeIncubationController { public: QQuickCanvasIncubationController(QQuickCanvasPrivate *canvas) : m_canvas(canvas), m_eventSent(false) {} protected: virtual bool event(QEvent *e) { if (e->type() == QEvent::User) { Q_ASSERT(m_eventSent); bool *amtp = m_canvas->thread->allowMainThreadProcessing(); while (incubatingObjectCount()) { if (amtp) incubateWhile(amtp); else incubateFor(5); QCoreApplication::processEvents(); } m_eventSent = false; } return QObject::event(e); } virtual void incubatingObjectCountChanged(int count) { if (count && !m_eventSent) { m_eventSent = true; QCoreApplication::postEvent(this, new QEvent(QEvent::User)); } } private: QQuickCanvasPrivate *m_canvas; bool m_eventSent; }; class QQuickCanvasPlainRenderLoop : public QObject, public QQuickCanvasRenderLoop { public: QQuickCanvasPlainRenderLoop() : updatePending(false) , animationRunning(false) { qWarning("QQuickCanvas: using non-threaded render loop. Be very sure to not access scene graph " "objects outside the QQuickItem::updatePaintNode() call. Failing to do so will cause " "your code to crash on other platforms!"); } virtual void paint() { updatePending = false; if (animationRunning && animationDriver()) animationDriver()->advance(); polishItems(); syncSceneGraph(); makeCurrent(); glViewport(0, 0, size.width(), size.height()); renderSceneGraph(size); swapBuffers(); if (animationRunning) maybeUpdate(); } virtual QImage grab() { return qt_gl_read_framebuffer(size, false, false); } virtual void startRendering() { if (!glContext()) { createGLContext(); makeCurrent(); initializeSceneGraph(); } else { makeCurrent(); } maybeUpdate(); } virtual void stopRendering() { } virtual void maybeUpdate() { if (!updatePending) { QCoreApplication::postEvent(this, new QEvent(QEvent::User)); updatePending = true; } } virtual void animationStarted() { animationRunning = true; maybeUpdate(); } virtual void animationStopped() { animationRunning = false; } virtual bool isRunning() const { return glContext(); } // Event loop is always running... virtual void resize(const QSize &s) { size = s; } virtual void setWindowSize(const QSize &s) { size = s; } bool event(QEvent *e) { if (e->type() == QEvent::User) { paint(); return true; } return QObject::event(e); } QSize size; uint updatePending : 1; uint animationRunning : 1; }; /* Focus behavior ============== Prior to being added to a valid canvas items can set and clear focus with no effect. Only once items are added to a canvas (by way of having a parent set that already belongs to a canvas) do the focus rules apply. Focus goes back to having no effect if an item is removed from a canvas. When an item is moved into a new focus scope (either being added to a canvas for the first time, or having its parent changed), if the focus scope already has a scope focused item that takes precedence over the item being added. Otherwise, the focus of the added tree is used. In the case of of a tree of items being added to a canvas for the first time, which may have a conflicted focus state (two or more items in one scope having focus set), the same rule is applied item by item - thus the first item that has focus will get it (assuming the scope doesn't already have a scope focused item), and the other items will have their focus cleared. */ /* Threaded Rendering ================== The threaded rendering uses a number of different variables to track potential states used to handle resizing, initial paint, grabbing and driving animations while ALWAYS keeping the GL context in the rendering thread and keeping the overhead of normal one-shot paints and vblank driven animations at a minimum. Resize, initial show and grab suffer slightly in this model as they are locked to the rendering in the rendering thread, but this is a necessary evil for the system to work. Variables that are used: Private::animationRunning: This is true while the animations are running, and only written to inside locks. RenderThread::isGuiBlocked: This is used to indicate that the GUI thread owns the lock. This variable is an integer to allow for recursive calls to lockInGui() without using a recursive mutex. See isGuiBlockPending. RenderThread::isPaintComplete: This variable is cleared when rendering starts and set once rendering is complete. It is monitored in the paintEvent(), resizeEvent() and grab() functions to force them to wait for rendering to complete. RenderThread::isGuiBlockPending: This variable is set in the render thread just before the sync event is sent to the GUI thread. It is used to avoid deadlocks in the case where render thread waits while waiting for GUI to pick up the sync event and GUI thread gets a resizeEvent, the initial paintEvent or a grab. When this happens, we use the exhaustSyncEvent() function to do the sync right there and mark the coming sync event to be discarded. There can only ever be one sync incoming. RenderThread::isRenderBlock: This variable is true when animations are not running and the render thread has gone to sleep, waiting for more to do. RenderThread::isExternalUpdatePending: This variable is set to false during the sync phase in the GUI thread and to true in maybeUpdate(). It is an indication to the render thread that another render pass needs to take place, rather than the render thread going to sleep after completing its swap. RenderThread::doGrab: This variable is set by the grab() function and tells the renderer to do a grab after rendering is complete and before swapping happens. RenderThread::shouldExit: This variable is used to determine if the render thread should do a nother pass. It is typically set as a result of show() and unset as a result of hide() or during shutdown() RenderThread::hasExited: Used by the GUI thread to synchronize the shutdown after shouldExit has been set to true. */ // #define FOCUS_DEBUG // #define MOUSE_DEBUG // #define TOUCH_DEBUG // #define DIRTY_DEBUG // #define THREAD_DEBUG // #define FRAME_TIMING #ifdef FRAME_TIMING static QTime frameTimer; int sceneGraphRenderTime; int readbackTime; #endif QQuickItem::UpdatePaintNodeData::UpdatePaintNodeData() : transformNode(0) { } QQuickRootItem::QQuickRootItem() { } void QQuickCanvas::exposeEvent(QExposeEvent *) { Q_D(QQuickCanvas); d->thread->paint(); } void QQuickCanvas::resizeEvent(QResizeEvent *) { Q_D(QQuickCanvas); d->thread->resize(size()); } void QQuickCanvas::animationStarted() { d_func()->thread->animationStarted(); } void QQuickCanvas::animationStopped() { d_func()->thread->animationStopped(); } void QQuickCanvas::showEvent(QShowEvent *) { Q_D(QQuickCanvas); if (d->vsyncAnimations) { if (!d->animationDriver) { d->animationDriver = d->context->createAnimationDriver(this); connect(d->animationDriver, SIGNAL(started()), this, SLOT(animationStarted()), Qt::DirectConnection); connect(d->animationDriver, SIGNAL(stopped()), this, SLOT(animationStopped()), Qt::DirectConnection); } d->animationDriver->install(); } if (!d->thread->isRunning()) { d->thread->setWindowSize(size()); d->thread->startRendering(); } } void QQuickCanvas::hideEvent(QHideEvent *) { Q_D(QQuickCanvas); d->thread->stopRendering(); } /*! Sets weither this canvas should use vsync driven animations. This option can only be set on one single QQuickCanvas, and that it's vsync signal will then be used to drive all animations in the process. This feature is primarily useful for single QQuickCanvas, QML-only applications. \warning Enabling vsync on multiple QQuickCanvas instances has undefined behavior. */ void QQuickCanvas::setVSyncAnimations(bool enabled) { Q_D(QQuickCanvas); if (visible()) { qWarning("QQuickCanvas::setVSyncAnimations: Cannot be changed when widget is shown"); return; } d->vsyncAnimations = enabled; } /*! Returns true if this canvas should use vsync driven animations; otherwise returns false. */ bool QQuickCanvas::vsyncAnimations() const { Q_D(const QQuickCanvas); return d->vsyncAnimations; } void QQuickCanvasPrivate::initializeSceneGraph() { if (!context) context = QSGContext::createDefaultContext(); if (context->isReady()) return; QOpenGLContext *glctx = const_cast(QOpenGLContext::currentContext()); context->initialize(glctx); Q_Q(QQuickCanvas); QObject::connect(context->renderer(), SIGNAL(sceneGraphChanged()), q, SLOT(maybeUpdate()), Qt::DirectConnection); if (!QQuickItemPrivate::get(rootItem)->itemNode()->parent()) { context->rootNode()->appendChildNode(QQuickItemPrivate::get(rootItem)->itemNode()); } emit q_func()->sceneGraphInitialized(); } void QQuickCanvasPrivate::polishItems() { while (!itemsToPolish.isEmpty()) { QSet::Iterator iter = itemsToPolish.begin(); QQuickItem *item = *iter; itemsToPolish.erase(iter); QQuickItemPrivate::get(item)->polishScheduled = false; item->updatePolish(); } updateFocusItemTransform(); } void QQuickCanvasPrivate::syncSceneGraph() { updateDirtyNodes(); } void QQuickCanvasPrivate::renderSceneGraph(const QSize &size) { context->renderer()->setDeviceRect(QRect(QPoint(0, 0), size)); context->renderer()->setViewportRect(QRect(QPoint(0, 0), renderTarget ? renderTarget->size() : size)); context->renderer()->setProjectionMatrixToDeviceRect(); context->renderNextFrame(renderTarget); #ifdef FRAME_TIMING sceneGraphRenderTime = frameTimer.elapsed(); #endif #ifdef FRAME_TIMING // int pixel; // glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixel); readbackTime = frameTimer.elapsed(); #endif } // ### Do we need this? void QQuickCanvas::sceneGraphChanged() { // Q_D(QQuickCanvas); // d->needsRepaint = true; } QQuickCanvasPrivate::QQuickCanvasPrivate() : rootItem(0) , activeFocusItem(0) , mouseGrabberItem(0) , dirtyItemList(0) , context(0) , vsyncAnimations(false) , thread(0) , animationDriver(0) , renderTarget(0) , incubationController(0) { } QQuickCanvasPrivate::~QQuickCanvasPrivate() { } void QQuickCanvasPrivate::init(QQuickCanvas *c) { QUnifiedTimer::instance(true)->setConsistentTiming(qmlFixedAnimationStep()); q_ptr = c; Q_Q(QQuickCanvas); rootItem = new QQuickRootItem; QQuickItemPrivate *rootItemPrivate = QQuickItemPrivate::get(rootItem); rootItemPrivate->canvas = q; rootItemPrivate->flags |= QQuickItem::ItemIsFocusScope; // QML always has focus. It is important that this call happens after the rootItem // has a canvas.. rootItem->setFocus(true); bool threaded = !qmlNoThreadedRenderer(); if (!QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ThreadedOpenGL)) { qWarning("QQuickCanvas: platform does not support threaded rendering!"); threaded = false; } if (threaded) thread = new QQuickCanvasRenderThread(); else thread = new QQuickCanvasPlainRenderLoop(); thread->renderer = q; thread->d = this; context = QSGContext::createDefaultContext(); thread->moveContextToThread(context); q->setSurfaceType(QWindow::OpenGLSurface); q->setFormat(context->defaultSurfaceFormat()); } void QQuickCanvasPrivate::transformTouchPoints(QList &touchPoints, const QTransform &transform) { for (int i=0; isetWidget(q); // ### refactor... QList touchPoints = touchEvent->touchPoints(); for (int i = 0; i < touchPoints.count(); ++i) { QTouchEvent::TouchPoint &touchPoint = touchPoints[i]; touchPoint.setScreenRect(touchPoint.sceneRect()); touchPoint.setStartScreenPos(touchPoint.startScenePos()); touchPoint.setLastScreenPos(touchPoint.lastScenePos()); touchPoint.setSceneRect(touchPoint.rect()); touchPoint.setStartScenePos(touchPoint.startPos()); touchPoint.setLastScenePos(touchPoint.lastPos()); if (touchPoint.isPrimary()) lastMousePosition = touchPoint.pos().toPoint(); } touchEvent->setTouchPoints(touchPoints); } void QQuickCanvasPrivate::setFocusInScope(QQuickItem *scope, QQuickItem *item, FocusOptions options) { Q_Q(QQuickCanvas); Q_ASSERT(item); Q_ASSERT(scope || item == rootItem); #ifdef FOCUS_DEBUG qWarning() << "QQuickCanvasPrivate::setFocusInScope():"; qWarning() << " scope:" << (QObject *)scope; if (scope) qWarning() << " scopeSubFocusItem:" << (QObject *)QQuickItemPrivate::get(scope)->subFocusItem; qWarning() << " item:" << (QObject *)item; qWarning() << " activeFocusItem:" << (QObject *)activeFocusItem; #endif QQuickItemPrivate *scopePrivate = scope ? QQuickItemPrivate::get(scope) : 0; QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item); QQuickItem *oldActiveFocusItem = 0; QQuickItem *newActiveFocusItem = 0; QVarLengthArray changed; // Does this change the active focus? if (item == rootItem || scopePrivate->activeFocus) { oldActiveFocusItem = activeFocusItem; newActiveFocusItem = item; while (newActiveFocusItem->isFocusScope() && newActiveFocusItem->scopedFocusItem()) newActiveFocusItem = newActiveFocusItem->scopedFocusItem(); if (oldActiveFocusItem) { #ifndef QT_NO_IM qApp->inputPanel()->commit(); #endif activeFocusItem = 0; QFocusEvent event(QEvent::FocusOut, Qt::OtherFocusReason); q->sendEvent(oldActiveFocusItem, &event); QQuickItem *afi = oldActiveFocusItem; while (afi != scope) { if (QQuickItemPrivate::get(afi)->activeFocus) { QQuickItemPrivate::get(afi)->activeFocus = false; changed << afi; } afi = afi->parentItem(); } } } if (item != rootItem) { QQuickItem *oldSubFocusItem = scopePrivate->subFocusItem; // Correct focus chain in scope if (oldSubFocusItem) { QQuickItem *sfi = scopePrivate->subFocusItem->parentItem(); while (sfi != scope) { QQuickItemPrivate::get(sfi)->subFocusItem = 0; sfi = sfi->parentItem(); } } { scopePrivate->subFocusItem = item; QQuickItem *sfi = scopePrivate->subFocusItem->parentItem(); while (sfi != scope) { QQuickItemPrivate::get(sfi)->subFocusItem = item; sfi = sfi->parentItem(); } } if (oldSubFocusItem) { QQuickItemPrivate::get(oldSubFocusItem)->focus = false; changed << oldSubFocusItem; } } if (!(options & DontChangeFocusProperty)) { // if (item != rootItem || q->hasFocus()) { // ### refactor: focus handling... itemPrivate->focus = true; changed << item; // } } if (newActiveFocusItem) { // ### refactor: && q->hasFocus()) { activeFocusItem = newActiveFocusItem; QQuickItemPrivate::get(newActiveFocusItem)->activeFocus = true; changed << newActiveFocusItem; QQuickItem *afi = newActiveFocusItem->parentItem(); while (afi && afi != scope) { if (afi->isFocusScope()) { QQuickItemPrivate::get(afi)->activeFocus = true; changed << afi; } afi = afi->parentItem(); } updateInputMethodData(); QFocusEvent event(QEvent::FocusIn, Qt::OtherFocusReason); q->sendEvent(newActiveFocusItem, &event); } else { updateInputMethodData(); } if (!changed.isEmpty()) notifyFocusChangesRecur(changed.data(), changed.count() - 1); } void QQuickCanvasPrivate::clearFocusInScope(QQuickItem *scope, QQuickItem *item, FocusOptions options) { Q_Q(QQuickCanvas); Q_UNUSED(item); Q_ASSERT(item); Q_ASSERT(scope || item == rootItem); #ifdef FOCUS_DEBUG qWarning() << "QQuickCanvasPrivate::clearFocusInScope():"; qWarning() << " scope:" << (QObject *)scope; qWarning() << " item:" << (QObject *)item; qWarning() << " activeFocusItem:" << (QObject *)activeFocusItem; #endif QQuickItemPrivate *scopePrivate = scope ? QQuickItemPrivate::get(scope) : 0; QQuickItem *oldActiveFocusItem = 0; QQuickItem *newActiveFocusItem = 0; QVarLengthArray changed; Q_ASSERT(item == rootItem || item == scopePrivate->subFocusItem); // Does this change the active focus? if (item == rootItem || scopePrivate->activeFocus) { oldActiveFocusItem = activeFocusItem; newActiveFocusItem = scope; Q_ASSERT(oldActiveFocusItem); #ifndef QT_NO_IM qApp->inputPanel()->commit(); #endif activeFocusItem = 0; QFocusEvent event(QEvent::FocusOut, Qt::OtherFocusReason); q->sendEvent(oldActiveFocusItem, &event); QQuickItem *afi = oldActiveFocusItem; while (afi != scope) { if (QQuickItemPrivate::get(afi)->activeFocus) { QQuickItemPrivate::get(afi)->activeFocus = false; changed << afi; } afi = afi->parentItem(); } } if (item != rootItem) { QQuickItem *oldSubFocusItem = scopePrivate->subFocusItem; // Correct focus chain in scope if (oldSubFocusItem) { QQuickItem *sfi = scopePrivate->subFocusItem->parentItem(); while (sfi != scope) { QQuickItemPrivate::get(sfi)->subFocusItem = 0; sfi = sfi->parentItem(); } } scopePrivate->subFocusItem = 0; if (oldSubFocusItem && !(options & DontChangeFocusProperty)) { QQuickItemPrivate::get(oldSubFocusItem)->focus = false; changed << oldSubFocusItem; } } else if (!(options & DontChangeFocusProperty)) { QQuickItemPrivate::get(item)->focus = false; changed << item; } if (newActiveFocusItem) { Q_ASSERT(newActiveFocusItem == scope); activeFocusItem = scope; updateInputMethodData(); QFocusEvent event(QEvent::FocusIn, Qt::OtherFocusReason); q->sendEvent(newActiveFocusItem, &event); } else { updateInputMethodData(); } if (!changed.isEmpty()) notifyFocusChangesRecur(changed.data(), changed.count() - 1); } void QQuickCanvasPrivate::notifyFocusChangesRecur(QQuickItem **items, int remaining) { QDeclarativeGuard item(*items); if (remaining) notifyFocusChangesRecur(items + 1, remaining - 1); if (item) { QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item); if (itemPrivate->notifiedFocus != itemPrivate->focus) { itemPrivate->notifiedFocus = itemPrivate->focus; emit item->focusChanged(itemPrivate->focus); } if (item && itemPrivate->notifiedActiveFocus != itemPrivate->activeFocus) { itemPrivate->notifiedActiveFocus = itemPrivate->activeFocus; itemPrivate->itemChange(QQuickItem::ItemActiveFocusHasChanged, itemPrivate->activeFocus); emit item->activeFocusChanged(itemPrivate->activeFocus); } } } void QQuickCanvasPrivate::updateInputMethodData() { QQuickItem *inputItem = 0; if (activeFocusItem && activeFocusItem->flags() & QQuickItem::ItemAcceptsInputMethod) inputItem = activeFocusItem; qApp->inputPanel()->setInputItem(inputItem); } QVariant QQuickCanvas::inputMethodQuery(Qt::InputMethodQuery query) const { Q_D(const QQuickCanvas); if (!d->activeFocusItem || !(QQuickItemPrivate::get(d->activeFocusItem)->flags & QQuickItem::ItemAcceptsInputMethod)) return QVariant(); QVariant value = d->activeFocusItem->inputMethodQuery(query); //map geometry types QVariant::Type type = value.type(); if (type == QVariant::RectF || type == QVariant::Rect) { const QTransform transform = QQuickItemPrivate::get(d->activeFocusItem)->itemToCanvasTransform(); value = transform.mapRect(value.toRectF()); } else if (type == QVariant::PointF || type == QVariant::Point) { const QTransform transform = QQuickItemPrivate::get(d->activeFocusItem)->itemToCanvasTransform(); value = transform.map(value.toPointF()); } return value; } void QQuickCanvasPrivate::dirtyItem(QQuickItem *) { Q_Q(QQuickCanvas); q->maybeUpdate(); } void QQuickCanvasPrivate::cleanup(QSGNode *n) { Q_Q(QQuickCanvas); Q_ASSERT(!cleanupNodeList.contains(n)); cleanupNodeList.append(n); q->maybeUpdate(); } QQuickCanvas::QQuickCanvas(QWindow *parent) : QWindow(*(new QQuickCanvasPrivate), parent) { Q_D(QQuickCanvas); d->init(this); } QQuickCanvas::QQuickCanvas(QQuickCanvasPrivate &dd, QWindow *parent) : QWindow(dd, parent) { Q_D(QQuickCanvas); d->init(this); } QQuickCanvas::~QQuickCanvas() { Q_D(QQuickCanvas); if (d->thread->isRunning()) { d->thread->stopRendering(); delete d->thread; d->thread = 0; } // ### should we change ~QQuickItem to handle this better? // manually cleanup for the root item (item destructor only handles these when an item is parented) QQuickItemPrivate *rootItemPrivate = QQuickItemPrivate::get(d->rootItem); rootItemPrivate->removeFromDirtyList(); delete d->incubationController; d->incubationController = 0; delete d->rootItem; d->rootItem = 0; d->cleanupNodes(); } QQuickItem *QQuickCanvas::rootItem() const { Q_D(const QQuickCanvas); return d->rootItem; } QQuickItem *QQuickCanvas::activeFocusItem() const { Q_D(const QQuickCanvas); return d->activeFocusItem; } QQuickItem *QQuickCanvas::mouseGrabberItem() const { Q_D(const QQuickCanvas); return d->mouseGrabberItem; } bool QQuickCanvasPrivate::clearHover() { if (hoverItems.isEmpty()) return false; QPointF pos = QCursor::pos(); // ### refactor: q->mapFromGlobal(QCursor::pos()); bool accepted = false; foreach (QQuickItem* item, hoverItems) accepted = sendHoverEvent(QEvent::HoverLeave, item, pos, pos, QGuiApplication::keyboardModifiers(), true) || accepted; hoverItems.clear(); return accepted; } bool QQuickCanvas::event(QEvent *e) { Q_D(QQuickCanvas); switch (e->type()) { case QEvent::TouchBegin: case QEvent::TouchUpdate: case QEvent::TouchEnd: { QTouchEvent *touch = static_cast(e); d->translateTouchEvent(touch); d->deliverTouchEvent(touch); if (!touch->isAccepted()) return false; break; } case QEvent::Leave: d->clearHover(); d->lastMousePosition = QPoint(); break; case QEvent::DragEnter: case QEvent::DragLeave: case QEvent::DragMove: case QEvent::Drop: d->deliverDragEvent(&d->dragGrabber, e); break; case QEvent::WindowDeactivate: rootItem()->windowDeactivateEvent(); break; default: break; } return QWindow::event(e); } void QQuickCanvas::keyPressEvent(QKeyEvent *e) { Q_D(QQuickCanvas); if (d->activeFocusItem) sendEvent(d->activeFocusItem, e); } void QQuickCanvas::keyReleaseEvent(QKeyEvent *e) { Q_D(QQuickCanvas); if (d->activeFocusItem) sendEvent(d->activeFocusItem, e); } void QQuickCanvas::inputMethodEvent(QInputMethodEvent *e) { Q_D(QQuickCanvas); if (d->activeFocusItem) sendEvent(d->activeFocusItem, e); } bool QQuickCanvasPrivate::deliverInitialMousePressEvent(QQuickItem *item, QMouseEvent *event) { Q_Q(QQuickCanvas); QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item); if (itemPrivate->opacity == 0.0) return false; if (itemPrivate->flags & QQuickItem::ItemClipsChildrenToShape) { QPointF p = item->mapFromScene(event->windowPos()); if (!QRectF(0, 0, item->width(), item->height()).contains(p)) return false; } QList children = itemPrivate->paintOrderChildItems(); for (int ii = children.count() - 1; ii >= 0; --ii) { QQuickItem *child = children.at(ii); if (!child->isVisible() || !child->isEnabled()) continue; if (deliverInitialMousePressEvent(child, event)) return true; } if (itemPrivate->acceptedMouseButtons & event->button()) { QPointF p = item->mapFromScene(event->windowPos()); if (QRectF(0, 0, item->width(), item->height()).contains(p)) { QMouseEvent me(event->type(), p, event->windowPos(), event->screenPos(), event->button(), event->buttons(), event->modifiers()); me.accept(); mouseGrabberItem = item; q->sendEvent(item, &me); event->setAccepted(me.isAccepted()); if (me.isAccepted()) return true; mouseGrabberItem->ungrabMouse(); mouseGrabberItem = 0; } } return false; } bool QQuickCanvasPrivate::deliverMouseEvent(QMouseEvent *event) { Q_Q(QQuickCanvas); lastMousePosition = event->windowPos(); if (!mouseGrabberItem && event->type() == QEvent::MouseButtonPress && (event->button() & event->buttons()) == event->buttons()) { return deliverInitialMousePressEvent(rootItem, event); } if (mouseGrabberItem) { QQuickItemPrivate *mgPrivate = QQuickItemPrivate::get(mouseGrabberItem); const QTransform &transform = mgPrivate->canvasToItemTransform(); QMouseEvent me(event->type(), transform.map(event->windowPos()), event->windowPos(), event->screenPos(), event->button(), event->buttons(), event->modifiers()); me.accept(); q->sendEvent(mouseGrabberItem, &me); event->setAccepted(me.isAccepted()); if (me.isAccepted()) return true; } return false; } void QQuickCanvas::mousePressEvent(QMouseEvent *event) { Q_D(QQuickCanvas); #ifdef MOUSE_DEBUG qWarning() << "QQuickCanvas::mousePressEvent()" << event->pos() << event->button() << event->buttons(); #endif d->deliverMouseEvent(event); } void QQuickCanvas::mouseReleaseEvent(QMouseEvent *event) { Q_D(QQuickCanvas); #ifdef MOUSE_DEBUG qWarning() << "QQuickCanvas::mouseReleaseEvent()" << event->pos() << event->button() << event->buttons(); #endif if (!d->mouseGrabberItem) { QWindow::mouseReleaseEvent(event); return; } d->deliverMouseEvent(event); d->mouseGrabberItem = 0; } void QQuickCanvas::mouseDoubleClickEvent(QMouseEvent *event) { Q_D(QQuickCanvas); #ifdef MOUSE_DEBUG qWarning() << "QQuickCanvas::mouseDoubleClickEvent()" << event->pos() << event->button() << event->buttons(); #endif if (!d->mouseGrabberItem && (event->button() & event->buttons()) == event->buttons()) { if (d->deliverInitialMousePressEvent(d->rootItem, event)) event->accept(); else event->ignore(); return; } d->deliverMouseEvent(event); } bool QQuickCanvasPrivate::sendHoverEvent(QEvent::Type type, QQuickItem *item, const QPointF &scenePos, const QPointF &lastScenePos, Qt::KeyboardModifiers modifiers, bool accepted) { Q_Q(QQuickCanvas); const QTransform transform = QQuickItemPrivate::get(item)->canvasToItemTransform(); //create copy of event QHoverEvent hoverEvent(type, transform.map(scenePos), transform.map(lastScenePos), modifiers); hoverEvent.setAccepted(accepted); q->sendEvent(item, &hoverEvent); return hoverEvent.isAccepted(); } void QQuickCanvas::mouseMoveEvent(QMouseEvent *event) { Q_D(QQuickCanvas); #ifdef MOUSE_DEBUG qWarning() << "QQuickCanvas::mouseMoveEvent()" << event->pos() << event->button() << event->buttons(); #endif if (!d->mouseGrabberItem) { if (d->lastMousePosition.isNull()) d->lastMousePosition = event->windowPos(); QPointF last = d->lastMousePosition; d->lastMousePosition = event->windowPos(); bool accepted = event->isAccepted(); bool delivered = d->deliverHoverEvent(d->rootItem, event->windowPos(), last, event->modifiers(), accepted); if (!delivered) { //take care of any exits accepted = d->clearHover(); } event->setAccepted(accepted); return; } d->deliverMouseEvent(event); } bool QQuickCanvasPrivate::deliverHoverEvent(QQuickItem *item, const QPointF &scenePos, const QPointF &lastScenePos, Qt::KeyboardModifiers modifiers, bool &accepted) { QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item); if (itemPrivate->opacity == 0.0) return false; if (itemPrivate->flags & QQuickItem::ItemClipsChildrenToShape) { QPointF p = item->mapFromScene(scenePos); if (!QRectF(0, 0, item->width(), item->height()).contains(p)) return false; } QList children = itemPrivate->paintOrderChildItems(); for (int ii = children.count() - 1; ii >= 0; --ii) { QQuickItem *child = children.at(ii); if (!child->isVisible() || !child->isEnabled()) continue; if (deliverHoverEvent(child, scenePos, lastScenePos, modifiers, accepted)) return true; } if (itemPrivate->hoverEnabled) { QPointF p = item->mapFromScene(scenePos); if (QRectF(0, 0, item->width(), item->height()).contains(p)) { if (!hoverItems.isEmpty() && hoverItems[0] == item) { //move accepted = sendHoverEvent(QEvent::HoverMove, item, scenePos, lastScenePos, modifiers, accepted); } else { QList itemsToHover; QQuickItem* parent = item; itemsToHover << item; while ((parent = parent->parentItem())) itemsToHover << parent; // Leaving from previous hovered items until we reach the item or one of its ancestors. while (!hoverItems.isEmpty() && !itemsToHover.contains(hoverItems[0])) { sendHoverEvent(QEvent::HoverLeave, hoverItems[0], scenePos, lastScenePos, modifiers, accepted); hoverItems.removeFirst(); } if (!hoverItems.isEmpty() && hoverItems[0] == item){//Not entering a new Item // ### Shouldn't we send moves for the parent items as well? accepted = sendHoverEvent(QEvent::HoverMove, item, scenePos, lastScenePos, modifiers, accepted); } else { // Enter items that are not entered yet. int startIdx = -1; if (!hoverItems.isEmpty()) startIdx = itemsToHover.indexOf(hoverItems[0]) - 1; if (startIdx == -1) startIdx = itemsToHover.count() - 1; for (int i = startIdx; i >= 0; i--) { QQuickItem *itemToHover = itemsToHover[i]; if (QQuickItemPrivate::get(itemToHover)->hoverEnabled) { hoverItems.prepend(itemToHover); sendHoverEvent(QEvent::HoverEnter, itemToHover, scenePos, lastScenePos, modifiers, accepted); } } } } return true; } } return false; } bool QQuickCanvasPrivate::deliverWheelEvent(QQuickItem *item, QWheelEvent *event) { Q_Q(QQuickCanvas); QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item); if (itemPrivate->opacity == 0.0) return false; if (itemPrivate->flags & QQuickItem::ItemClipsChildrenToShape) { QPointF p = item->mapFromScene(event->posF()); if (!QRectF(0, 0, item->width(), item->height()).contains(p)) return false; } QList children = itemPrivate->paintOrderChildItems(); for (int ii = children.count() - 1; ii >= 0; --ii) { QQuickItem *child = children.at(ii); if (!child->isVisible() || !child->isEnabled()) continue; if (deliverWheelEvent(child, event)) return true; } QPointF p = item->mapFromScene(event->posF()); if (QRectF(0, 0, item->width(), item->height()).contains(p)) { QWheelEvent wheel(p, event->delta(), event->buttons(), event->modifiers(), event->orientation()); wheel.accept(); q->sendEvent(item, &wheel); if (wheel.isAccepted()) { event->accept(); return true; } } return false; } #ifndef QT_NO_WHEELEVENT void QQuickCanvas::wheelEvent(QWheelEvent *event) { Q_D(QQuickCanvas); #ifdef MOUSE_DEBUG qWarning() << "QQuickCanvas::wheelEvent()" << event->pos() << event->delta() << event->orientation(); #endif event->ignore(); d->deliverWheelEvent(d->rootItem, event); } #endif // QT_NO_WHEELEVENT bool QQuickCanvasPrivate::deliverTouchEvent(QTouchEvent *event) { #ifdef TOUCH_DEBUG if (event->type() == QEvent::TouchBegin) qWarning("touchBeginEvent"); else if (event->type() == QEvent::TouchUpdate) qWarning("touchUpdateEvent"); else if (event->type() == QEvent::TouchEnd) qWarning("touchEndEvent"); #endif QHash > updatedPoints; if (event->type() == QTouchEvent::TouchBegin) { // all points are new touch points QSet acceptedNewPoints; deliverTouchPoints(rootItem, event, event->touchPoints(), &acceptedNewPoints, &updatedPoints); if (acceptedNewPoints.count() > 0) event->accept(); return event->isAccepted(); } const QList &touchPoints = event->touchPoints(); QList newPoints; QQuickItem *item = 0; for (int i=0; i 0 || updatedPoints.count() > 0) { QSet acceptedNewPoints; int prevCount = updatedPoints.count(); deliverTouchPoints(rootItem, event, newPoints, &acceptedNewPoints, &updatedPoints); if (acceptedNewPoints.count() > 0 || updatedPoints.count() != prevCount) event->accept(); } if (event->touchPointStates() & Qt::TouchPointReleased) { for (int i=0; iisAccepted(); } bool QQuickCanvasPrivate::deliverTouchPoints(QQuickItem *item, QTouchEvent *event, const QList &newPoints, QSet *acceptedNewPoints, QHash > *updatedPoints) { Q_Q(QQuickCanvas); QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item); if (itemPrivate->opacity == 0.0) return false; if (itemPrivate->flags & QQuickItem::ItemClipsChildrenToShape) { QRectF bounds(0, 0, item->width(), item->height()); for (int i=0; imapFromScene(newPoints[i].scenePos()); if (!bounds.contains(p)) return false; } } QList children = itemPrivate->paintOrderChildItems(); for (int ii = children.count() - 1; ii >= 0; --ii) { QQuickItem *child = children.at(ii); if (!child->isEnabled()) continue; if (deliverTouchPoints(child, event, newPoints, acceptedNewPoints, updatedPoints)) return true; } QList matchingPoints; if (newPoints.count() > 0 && acceptedNewPoints->count() < newPoints.count()) { QRectF bounds(0, 0, item->width(), item->height()); for (int i=0; icontains(newPoints[i].id())) continue; QPointF p = item->mapFromScene(newPoints[i].scenePos()); if (bounds.contains(p)) matchingPoints << newPoints[i]; } } if (matchingPoints.count() > 0 || (*updatedPoints)[item].count() > 0) { QList &eventPoints = (*updatedPoints)[item]; eventPoints.append(matchingPoints); transformTouchPoints(eventPoints, itemPrivate->canvasToItemTransform()); Qt::TouchPointStates eventStates; for (int i=0; ideviceType()); touchEvent.setModifiers(event->modifiers()); touchEvent.setTouchPointStates(eventStates); touchEvent.setTouchPoints(eventPoints); touchEvent.setTimestamp(event->timestamp()); touchEvent.accept(); q->sendEvent(item, &touchEvent); if (touchEvent.isAccepted()) { for (int i=0; iinsert(matchingPoints[i].id()); } } } } updatedPoints->remove(item); if (acceptedNewPoints->count() == newPoints.count() && updatedPoints->isEmpty()) return true; return false; } void QQuickCanvasPrivate::deliverDragEvent(QQuickDragGrabber *grabber, QEvent *event) { Q_Q(QQuickCanvas); grabber->resetTarget(); QQuickDragGrabber::iterator grabItem = grabber->begin(); if (grabItem != grabber->end()) { Q_ASSERT(event->type() != QEvent::DragEnter); if (event->type() == QEvent::Drop) { QDropEvent *e = static_cast(event); for (e->setAccepted(false); !e->isAccepted() && grabItem != grabber->end(); grabItem = grabber->release(grabItem)) { QPointF p = (**grabItem)->mapFromScene(e->pos()); QDropEvent translatedEvent( p.toPoint(), e->possibleActions(), e->mimeData(), e->mouseButtons(), e->keyboardModifiers()); QQuickDropEventEx::copyActions(&translatedEvent, *e); q->sendEvent(**grabItem, &translatedEvent); e->setAccepted(translatedEvent.isAccepted()); e->setDropAction(translatedEvent.dropAction()); grabber->setTarget(**grabItem); } } if (event->type() != QEvent::DragMove) { // Either an accepted drop or a leave. QDragLeaveEvent leaveEvent; for (; grabItem != grabber->end(); grabItem = grabber->release(grabItem)) q->sendEvent(**grabItem, &leaveEvent); return; } else for (; grabItem != grabber->end(); grabItem = grabber->release(grabItem)) { QDragMoveEvent *moveEvent = static_cast(event); if (deliverDragEvent(grabber, **grabItem, moveEvent)) { moveEvent->setAccepted(true); for (++grabItem; grabItem != grabber->end();) { QPointF p = (**grabItem)->mapFromScene(moveEvent->pos()); if (QRectF(0, 0, (**grabItem)->width(), (**grabItem)->height()).contains(p)) { QDragMoveEvent translatedEvent( p.toPoint(), moveEvent->possibleActions(), moveEvent->mimeData(), moveEvent->mouseButtons(), moveEvent->keyboardModifiers()); QQuickDropEventEx::copyActions(&translatedEvent, *moveEvent); q->sendEvent(**grabItem, &translatedEvent); ++grabItem; } else { QDragLeaveEvent leaveEvent; q->sendEvent(**grabItem, &leaveEvent); grabItem = grabber->release(grabItem); } } return; } else { QDragLeaveEvent leaveEvent; q->sendEvent(**grabItem, &leaveEvent); } } } if (event->type() == QEvent::DragEnter || event->type() == QEvent::DragMove) { QDragMoveEvent *e = static_cast(event); QDragEnterEvent enterEvent( e->pos(), e->possibleActions(), e->mimeData(), e->mouseButtons(), e->keyboardModifiers()); QQuickDropEventEx::copyActions(&enterEvent, *e); event->setAccepted(deliverDragEvent(grabber, rootItem, &enterEvent)); } } bool QQuickCanvasPrivate::deliverDragEvent(QQuickDragGrabber *grabber, QQuickItem *item, QDragMoveEvent *event) { Q_Q(QQuickCanvas); bool accepted = false; QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item); if (itemPrivate->opacity == 0.0 || !item->isVisible() || !item->isEnabled()) return false; QPointF p = item->mapFromScene(event->pos()); if (QRectF(0, 0, item->width(), item->height()).contains(p)) { if (event->type() == QEvent::DragMove || itemPrivate->flags & QQuickItem::ItemAcceptsDrops) { QDragMoveEvent translatedEvent( p.toPoint(), event->possibleActions(), event->mimeData(), event->mouseButtons(), event->keyboardModifiers(), event->type()); QQuickDropEventEx::copyActions(&translatedEvent, *event); q->sendEvent(item, &translatedEvent); if (event->type() == QEvent::DragEnter) { if (translatedEvent.isAccepted()) { grabber->grab(item); accepted = true; } } else { accepted = true; } } } else if (itemPrivate->flags & QQuickItem::ItemClipsChildrenToShape) { return false; } QDragEnterEvent enterEvent( event->pos(), event->possibleActions(), event->mimeData(), event->mouseButtons(), event->keyboardModifiers()); QQuickDropEventEx::copyActions(&enterEvent, *event); QList children = itemPrivate->paintOrderChildItems(); for (int ii = children.count() - 1; ii >= 0; --ii) { if (deliverDragEvent(grabber, children.at(ii), &enterEvent)) return true; } return accepted; } bool QQuickCanvasPrivate::sendFilteredMouseEvent(QQuickItem *target, QQuickItem *item, QMouseEvent *event) { if (!target) return false; QQuickItemPrivate *targetPrivate = QQuickItemPrivate::get(target); if (targetPrivate->filtersChildMouseEvents) if (target->childMouseEventFilter(item, event)) return true; if (sendFilteredMouseEvent(target->parentItem(), item, event)) return true; return false; } bool QQuickCanvas::sendEvent(QQuickItem *item, QEvent *e) { Q_D(QQuickCanvas); if (!item) { qWarning("QQuickCanvas::sendEvent: Cannot send event to a null item"); return false; } Q_ASSERT(e); switch (e->type()) { case QEvent::KeyPress: case QEvent::KeyRelease: e->accept(); QQuickItemPrivate::get(item)->deliverKeyEvent(static_cast(e)); while (!e->isAccepted() && (item = item->parentItem())) { e->accept(); QQuickItemPrivate::get(item)->deliverKeyEvent(static_cast(e)); } break; case QEvent::InputMethod: e->accept(); QQuickItemPrivate::get(item)->deliverInputMethodEvent(static_cast(e)); while (!e->isAccepted() && (item = item->parentItem())) { e->accept(); QQuickItemPrivate::get(item)->deliverInputMethodEvent(static_cast(e)); } break; case QEvent::FocusIn: case QEvent::FocusOut: QQuickItemPrivate::get(item)->deliverFocusEvent(static_cast(e)); break; case QEvent::MouseButtonPress: case QEvent::MouseButtonRelease: case QEvent::MouseButtonDblClick: case QEvent::MouseMove: // XXX todo - should sendEvent be doing this? how does it relate to forwarded events? { QMouseEvent *se = static_cast(e); if (!d->sendFilteredMouseEvent(item->parentItem(), item, se)) { se->accept(); QQuickItemPrivate::get(item)->deliverMouseEvent(se); } } break; case QEvent::Wheel: QQuickItemPrivate::get(item)->deliverWheelEvent(static_cast(e)); break; case QEvent::HoverEnter: case QEvent::HoverLeave: case QEvent::HoverMove: QQuickItemPrivate::get(item)->deliverHoverEvent(static_cast(e)); break; case QEvent::TouchBegin: case QEvent::TouchUpdate: case QEvent::TouchEnd: QQuickItemPrivate::get(item)->deliverTouchEvent(static_cast(e)); break; case QEvent::DragEnter: case QEvent::DragMove: case QEvent::DragLeave: case QEvent::Drop: QQuickItemPrivate::get(item)->deliverDragEvent(e); break; default: break; } return false; } void QQuickCanvasPrivate::cleanupNodes() { for (int ii = 0; ii < cleanupNodeList.count(); ++ii) delete cleanupNodeList.at(ii); cleanupNodeList.clear(); } void QQuickCanvasPrivate::updateDirtyNodes() { #ifdef DIRTY_DEBUG qWarning() << "QQuickCanvasPrivate::updateDirtyNodes():"; #endif cleanupNodes(); QQuickItem *updateList = dirtyItemList; dirtyItemList = 0; if (updateList) QQuickItemPrivate::get(updateList)->prevDirtyItem = &updateList; while (updateList) { QQuickItem *item = updateList; QQuickItemPrivate *itemPriv = QQuickItemPrivate::get(item); itemPriv->removeFromDirtyList(); #ifdef DIRTY_DEBUG qWarning() << " QSGNode:" << item << qPrintable(itemPriv->dirtyToString()); #endif updateDirtyNode(item); } } void QQuickCanvasPrivate::updateDirtyNode(QQuickItem *item) { #ifdef QML_RUNTIME_TESTING bool didFlash = false; #endif QQuickItemPrivate *itemPriv = QQuickItemPrivate::get(item); quint32 dirty = itemPriv->dirtyAttributes; itemPriv->dirtyAttributes = 0; if ((dirty & QQuickItemPrivate::TransformUpdateMask) || (dirty & QQuickItemPrivate::Size && itemPriv->origin != QQuickItem::TopLeft && (itemPriv->scale != 1. || itemPriv->rotation != 0.))) { QMatrix4x4 matrix; if (itemPriv->x != 0. || itemPriv->y != 0.) matrix.translate(itemPriv->x, itemPriv->y); for (int ii = itemPriv->transforms.count() - 1; ii >= 0; --ii) itemPriv->transforms.at(ii)->applyTo(&matrix); if (itemPriv->scale != 1. || itemPriv->rotation != 0.) { QPointF origin = item->transformOriginPoint(); matrix.translate(origin.x(), origin.y()); if (itemPriv->scale != 1.) matrix.scale(itemPriv->scale, itemPriv->scale); if (itemPriv->rotation != 0.) matrix.rotate(itemPriv->rotation, 0, 0, 1); matrix.translate(-origin.x(), -origin.y()); } itemPriv->itemNode()->setMatrix(matrix); } bool clipEffectivelyChanged = dirty & QQuickItemPrivate::Clip && ((item->clip() == false) != (itemPriv->clipNode == 0)); bool effectRefEffectivelyChanged = dirty & QQuickItemPrivate::EffectReference && ((itemPriv->effectRefCount == 0) != (itemPriv->rootNode == 0)); if (clipEffectivelyChanged) { QSGNode *parent = itemPriv->opacityNode ? (QSGNode *) itemPriv->opacityNode : (QSGNode *)itemPriv->itemNode(); QSGNode *child = itemPriv->rootNode ? (QSGNode *)itemPriv->rootNode : (QSGNode *)itemPriv->groupNode; if (item->clip()) { Q_ASSERT(itemPriv->clipNode == 0); itemPriv->clipNode = new QQuickDefaultClipNode(item->boundingRect()); itemPriv->clipNode->update(); if (child) parent->removeChildNode(child); parent->appendChildNode(itemPriv->clipNode); if (child) itemPriv->clipNode->appendChildNode(child); } else { Q_ASSERT(itemPriv->clipNode != 0); parent->removeChildNode(itemPriv->clipNode); if (child) itemPriv->clipNode->removeChildNode(child); delete itemPriv->clipNode; itemPriv->clipNode = 0; if (child) parent->appendChildNode(child); } } if (dirty & QQuickItemPrivate::ChildrenUpdateMask) itemPriv->childContainerNode()->removeAllChildNodes(); if (effectRefEffectivelyChanged) { QSGNode *parent = itemPriv->clipNode; if (!parent) parent = itemPriv->opacityNode; if (!parent) parent = itemPriv->itemNode(); QSGNode *child = itemPriv->groupNode; if (itemPriv->effectRefCount) { Q_ASSERT(itemPriv->rootNode == 0); itemPriv->rootNode = new QSGRootNode; if (child) parent->removeChildNode(child); parent->appendChildNode(itemPriv->rootNode); if (child) itemPriv->rootNode->appendChildNode(child); } else { Q_ASSERT(itemPriv->rootNode != 0); parent->removeChildNode(itemPriv->rootNode); if (child) itemPriv->rootNode->removeChildNode(child); delete itemPriv->rootNode; itemPriv->rootNode = 0; if (child) parent->appendChildNode(child); } } if (dirty & QQuickItemPrivate::ChildrenUpdateMask) { QSGNode *groupNode = itemPriv->groupNode; if (groupNode) groupNode->removeAllChildNodes(); QList orderedChildren = itemPriv->paintOrderChildItems(); int ii = 0; for (; ii < orderedChildren.count() && orderedChildren.at(ii)->z() < 0; ++ii) { QQuickItemPrivate *childPrivate = QQuickItemPrivate::get(orderedChildren.at(ii)); if (!childPrivate->explicitVisible && !childPrivate->effectRefCount) continue; if (childPrivate->itemNode()->parent()) childPrivate->itemNode()->parent()->removeChildNode(childPrivate->itemNode()); itemPriv->childContainerNode()->appendChildNode(childPrivate->itemNode()); } itemPriv->beforePaintNode = itemPriv->groupNode ? itemPriv->groupNode->lastChild() : 0; if (itemPriv->paintNode) itemPriv->childContainerNode()->appendChildNode(itemPriv->paintNode); for (; ii < orderedChildren.count(); ++ii) { QQuickItemPrivate *childPrivate = QQuickItemPrivate::get(orderedChildren.at(ii)); if (!childPrivate->explicitVisible && !childPrivate->effectRefCount) continue; if (childPrivate->itemNode()->parent()) childPrivate->itemNode()->parent()->removeChildNode(childPrivate->itemNode()); itemPriv->childContainerNode()->appendChildNode(childPrivate->itemNode()); } } if ((dirty & QQuickItemPrivate::Size) && itemPriv->clipNode) { itemPriv->clipNode->setRect(item->boundingRect()); itemPriv->clipNode->update(); } if (dirty & (QQuickItemPrivate::OpacityValue | QQuickItemPrivate::Visible | QQuickItemPrivate::HideReference)) { qreal opacity = itemPriv->explicitVisible && itemPriv->hideRefCount == 0 ? itemPriv->opacity : qreal(0); if (opacity != 1 && !itemPriv->opacityNode) { itemPriv->opacityNode = new QSGOpacityNode; QSGNode *parent = itemPriv->itemNode(); QSGNode *child = itemPriv->clipNode; if (!child) child = itemPriv->rootNode; if (!child) child = itemPriv->groupNode; if (child) parent->removeChildNode(child); parent->appendChildNode(itemPriv->opacityNode); if (child) itemPriv->opacityNode->appendChildNode(child); } if (itemPriv->opacityNode) itemPriv->opacityNode->setOpacity(opacity); } if (dirty & QQuickItemPrivate::ContentUpdateMask) { if (itemPriv->flags & QQuickItem::ItemHasContents) { updatePaintNodeData.transformNode = itemPriv->itemNode(); itemPriv->paintNode = item->updatePaintNode(itemPriv->paintNode, &updatePaintNodeData); Q_ASSERT(itemPriv->paintNode == 0 || itemPriv->paintNode->parent() == 0 || itemPriv->paintNode->parent() == itemPriv->childContainerNode()); if (itemPriv->paintNode && itemPriv->paintNode->parent() == 0) { if (itemPriv->beforePaintNode) itemPriv->childContainerNode()->insertChildNodeAfter(itemPriv->paintNode, itemPriv->beforePaintNode); else itemPriv->childContainerNode()->prependChildNode(itemPriv->paintNode); } } else if (itemPriv->paintNode) { delete itemPriv->paintNode; itemPriv->paintNode = 0; } } #ifndef QT_NO_DEBUG // Check consistency. const QSGNode *nodeChain[] = { itemPriv->itemNodeInstance, itemPriv->opacityNode, itemPriv->clipNode, itemPriv->rootNode, itemPriv->groupNode, itemPriv->paintNode, }; int ip = 0; for (;;) { while (ip < 5 && nodeChain[ip] == 0) ++ip; if (ip == 5) break; int ic = ip + 1; while (ic < 5 && nodeChain[ic] == 0) ++ic; const QSGNode *parent = nodeChain[ip]; const QSGNode *child = nodeChain[ic]; if (child == 0) { Q_ASSERT(parent == itemPriv->groupNode || parent->childCount() == 0); } else { Q_ASSERT(parent == itemPriv->groupNode || parent->childCount() == 1); Q_ASSERT(child->parent() == parent); bool containsChild = false; for (QSGNode *n = parent->firstChild(); n; n = n->nextSibling()) containsChild |= (n == child); Q_ASSERT(containsChild); } ip = ic; } #endif #ifdef QML_RUNTIME_TESTING if (itemPriv->sceneGraphContext()->isFlashModeEnabled()) { QSGFlashNode *flash = new QSGFlashNode(); flash->setRect(item->boundingRect()); itemPriv->childContainerNode()->appendChildNode(flash); didFlash = true; } Q_Q(QQuickCanvas); if (didFlash) { q->maybeUpdate(); } #endif } void QQuickCanvas::maybeUpdate() { Q_D(QQuickCanvas); if (d->thread && d->thread->isRunning()) d->thread->maybeUpdate(); } /*! \fn void QSGEngine::sceneGraphInitialized(); This signal is emitted when the scene graph has been initialized. This signal will be emitted from the scene graph rendering thread. */ /*! Returns the QSGEngine used for this scene. The engine will only be available once the scene graph has been initialized. Register for the sceneGraphEngine() signal to get notification about this. */ QSGEngine *QQuickCanvas::sceneGraphEngine() const { Q_D(const QQuickCanvas); if (d->context && d->context->isReady()) return d->context->engine(); return 0; } /*! Sets the render target for this canvas to be \a fbo. The specified fbo must be created in the context of the canvas or one that shares with it. \warning This function can only be called from the thread doing the rendering. */ void QQuickCanvas::setRenderTarget(QOpenGLFramebufferObject *fbo) { Q_D(QQuickCanvas); if (d->context && d->context && QThread::currentThread() != d->context->thread()) { qWarning("QQuickCanvas::setRenderThread: Cannot set render target from outside the rendering thread"); return; } d->renderTarget = fbo; } /*! Returns the render target for this canvas. The default is to render to the surface of the canvas, in which case the render target is 0. */ QOpenGLFramebufferObject *QQuickCanvas::renderTarget() const { Q_D(const QQuickCanvas); return d->renderTarget; } /*! Grabs the contents of the framebuffer and returns it as an image. This function might not work if the view is not visible. \warning Calling this function will cause performance problems. \warning This function can only be called from the GUI thread. */ QImage QQuickCanvas::grabFrameBuffer() { Q_D(QQuickCanvas); return d->thread ? d->thread->grab() : QImage(); } /*! Returns an incubation controller that splices incubation between frames for this canvas. QQuickView automatically installs this controller for you. The controller is owned by the canvas and will be destroyed when the canvas is deleted. */ QDeclarativeIncubationController *QQuickCanvas::incubationController() const { Q_D(const QQuickCanvas); if (!d->incubationController) d->incubationController = new QQuickCanvasIncubationController(const_cast(d)); return d->incubationController; } void QQuickCanvasRenderLoop::createGLContext() { gl = new QOpenGLContext(); gl->setFormat(renderer->requestedFormat()); gl->create(); } void QQuickCanvasRenderThread::run() { #ifdef THREAD_DEBUG qDebug("QML Rendering Thread Started"); #endif if (!glContext()) { createGLContext(); makeCurrent(); initializeSceneGraph(); } else { makeCurrent(); } while (!shouldExit) { lock(); bool sizeChanged = false; isExternalUpdatePending = false; if (renderedSize != windowSize) { #ifdef THREAD_DEBUG printf(" RenderThread: window has changed size...\n"); #endif glViewport(0, 0, windowSize.width(), windowSize.height()); sizeChanged = true; } #ifdef THREAD_DEBUG printf(" RenderThread: preparing to sync...\n"); #endif if (!isGuiBlocked) { isGuiBlockPending = true; #ifdef THREAD_DEBUG printf(" RenderThread: aquired sync lock...\n"); #endif allowMainThreadProcessingFlag = false; QCoreApplication::postEvent(this, new QEvent(QEvent::User)); #ifdef THREAD_DEBUG printf(" RenderThread: going to sleep...\n"); #endif wait(); isGuiBlockPending = false; } #ifdef THREAD_DEBUG printf(" RenderThread: Doing locked sync\n"); #endif #ifdef QQUICK_CANVAS_TIMING if (qquick_canvas_timing) threadTimer.start(); #endif inSync = true; syncSceneGraph(); inSync = false; // Wake GUI after sync to let it continue animating and event processing. allowMainThreadProcessingFlag = true; wake(); unlock(); #ifdef THREAD_DEBUG printf(" RenderThread: sync done\n"); #endif #ifdef QQUICK_CANVAS_TIMING if (qquick_canvas_timing) syncTime = threadTimer.elapsed(); #endif #ifdef THREAD_DEBUG printf(" RenderThread: rendering... %d x %d\n", windowSize.width(), windowSize.height()); #endif renderSceneGraph(windowSize); #ifdef QQUICK_CANVAS_TIMING if (qquick_canvas_timing) renderTime = threadTimer.elapsed() - syncTime; #endif // The content of the target buffer is undefined after swap() so grab needs // to happen before swap(); if (doGrab) { #ifdef THREAD_DEBUG printf(" RenderThread: doing a grab...\n"); #endif grabContent = qt_gl_read_framebuffer(windowSize, false, false); doGrab = false; } #ifdef THREAD_DEBUG printf(" RenderThread: wait for swap...\n"); #endif swapBuffers(); #ifdef THREAD_DEBUG printf(" RenderThread: swap complete...\n"); #endif #ifdef QQUICK_CANVAS_TIMING if (qquick_canvas_timing) { swapTime = threadTimer.elapsed() - renderTime; qDebug() << "- Breakdown of frame time: sync:" << syncTime << "ms render:" << renderTime << "ms swap:" << swapTime << "ms total:" << swapTime + renderTime << "ms"; } #endif lock(); isPaintCompleted = true; if (sizeChanged) renderedSize = windowSize; // Wake the GUI thread now that rendering is complete, to signal that painting // is done, resizing is done or grabbing is completed. For grabbing, we're // signalling this much later than needed (we could have done it before swap) // but we don't want to lock an extra time. wake(); if (!animationRunning && !isExternalUpdatePending && !shouldExit && !doGrab) { #ifdef THREAD_DEBUG printf(" RenderThread: nothing to do, going to sleep...\n"); #endif isRenderBlocked = true; wait(); isRenderBlocked = false; } unlock(); // Process any "deleteLater" objects... QCoreApplication::processEvents(); } #ifdef THREAD_DEBUG printf(" RenderThread: render loop exited... Good Night!\n"); #endif doneCurrent(); lock(); hasExited = true; #ifdef THREAD_DEBUG printf(" RenderThread: waking GUI for final sleep..\n"); #endif wake(); unlock(); #ifdef THREAD_DEBUG printf(" RenderThread: All done...\n"); #endif } bool QQuickCanvasRenderThread::event(QEvent *e) { Q_ASSERT(QThread::currentThread() == qApp->thread()); if (e->type() == QEvent::User) { if (!syncAlreadyHappened) sync(false); syncAlreadyHappened = false; if (animationRunning && animationDriver()) { #ifdef THREAD_DEBUG qDebug("GUI: Advancing animations...\n"); #endif animationDriver()->advance(); #ifdef THREAD_DEBUG qDebug("GUI: Animations advanced...\n"); #endif } return true; } return QThread::event(e); } void QQuickCanvasRenderThread::exhaustSyncEvent() { if (isGuiBlockPending) { sync(true); syncAlreadyHappened = true; } } void QQuickCanvasRenderThread::sync(bool guiAlreadyLocked) { #ifdef THREAD_DEBUG printf("GUI: sync - %s\n", guiAlreadyLocked ? "outside event" : "inside event"); #endif if (!guiAlreadyLocked) lockInGui(); renderThreadAwakened = false; polishItems(); wake(); wait(); if (!guiAlreadyLocked) unlockInGui(); } /*! Acquires the mutex for the GUI thread. The function uses the isGuiBlocked variable to keep track of how many recursion levels the gui is locket with. We only actually acquire the mutex for the first level to avoid deadlocking ourselves. */ void QQuickCanvasRenderThread::lockInGui() { // We must avoid recursive locking in the GUI thread, hence we // only lock when we are the first one to try to block. if (!isGuiBlocked) lock(); isGuiBlocked++; #ifdef THREAD_DEBUG printf("GUI: aquired lock... %d\n", isGuiBlocked); #endif } void QQuickCanvasRenderThread::unlockInGui() { #ifdef THREAD_DEBUG printf("GUI: releasing lock... %d\n", isGuiBlocked); #endif --isGuiBlocked; if (!isGuiBlocked) unlock(); } void QQuickCanvasRenderThread::animationStarted() { #ifdef THREAD_DEBUG printf("GUI: animationStarted()\n"); #endif lockInGui(); animationRunning = true; if (isRenderBlocked) wake(); unlockInGui(); } void QQuickCanvasRenderThread::animationStopped() { #ifdef THREAD_DEBUG printf("GUI: animationStopped()...\n"); #endif lockInGui(); animationRunning = false; unlockInGui(); } void QQuickCanvasRenderThread::paint() { #ifdef THREAD_DEBUG printf("GUI: paint called..\n"); #endif lockInGui(); exhaustSyncEvent(); isPaintCompleted = false; while (isRunning() && !isPaintCompleted) { if (isRenderBlocked) wake(); wait(); } unlockInGui(); } void QQuickCanvasRenderThread::resize(const QSize &size) { #ifdef THREAD_DEBUG printf("GUI: Resize Event: %dx%d\n", size.width(), size.height()); #endif if (!isRunning()) { windowSize = size; return; } lockInGui(); exhaustSyncEvent(); windowSize = size; while (isRunning() && renderedSize != windowSize) { if (isRenderBlocked) wake(); wait(); } unlockInGui(); } void QQuickCanvasRenderThread::startRendering() { #ifdef THREAD_DEBUG printf("GUI: Starting Render Thread\n"); #endif hasExited = false; shouldExit = false; isGuiBlocked = 0; isGuiBlockPending = false; start(); } void QQuickCanvasRenderThread::stopRendering() { #ifdef THREAD_DEBUG printf("GUI: stopping render thread\n"); #endif lockInGui(); exhaustSyncEvent(); shouldExit = true; if (isRenderBlocked) { #ifdef THREAD_DEBUG printf("GUI: waking up render thread\n"); #endif wake(); } while (!hasExited) { #ifdef THREAD_DEBUG printf("GUI: waiting for render thread to have exited..\n"); #endif wait(); } unlockInGui(); #ifdef THREAD_DEBUG printf("GUI: waiting for render thread to terminate..\n"); #endif // Actually wait for the thread to terminate. Otherwise we can delete it // too early and crash. QThread::wait(); #ifdef THREAD_DEBUG printf("GUI: thread has terminated and we're all good..\n"); #endif } QImage QQuickCanvasRenderThread::grab() { if (!isRunning()) return QImage(); if (QThread::currentThread() != qApp->thread()) { qWarning("QQuickCanvas::grabFrameBuffer: can only be called from the GUI thread"); return QImage(); } #ifdef THREAD_DEBUG printf("GUI: doing a pixelwise grab..\n"); #endif lockInGui(); exhaustSyncEvent(); doGrab = true; isPaintCompleted = false; while (isRunning() && !isPaintCompleted) { if (isRenderBlocked) wake(); wait(); } QImage grabbed = grabContent; grabContent = QImage(); unlockInGui(); return grabbed; } void QQuickCanvasRenderThread::maybeUpdate() { Q_ASSERT_X(QThread::currentThread() == QCoreApplication::instance()->thread() || inSync, "QQuickCanvas::update", "Function can only be called from GUI thread or during QQuickItem::updatePaintNode()"); if (inSync) { isExternalUpdatePending = true; } else if (!renderThreadAwakened) { #ifdef THREAD_DEBUG printf("GUI: doing update...\n"); #endif renderThreadAwakened = true; lockInGui(); isExternalUpdatePending = true; if (isRenderBlocked) wake(); unlockInGui(); } } #include "moc_qquickcanvas.cpp" QT_END_NAMESPACE