C++ QSGNode::parent方法代码示例

void QQuickOpacityAnimatorJob::initialize(QQuickAnimatorController *controller)
{
    QQuickAnimatorJob::initialize(controller);
    QQuickItemPrivate *d = QQuickItemPrivate::get(m_target);
    if (d->extra.isAllocated()
            && d->extra->layer
            && d->extra->layer->enabled()) {
        d = QQuickItemPrivate::get(d->extra->layer->m_effectSource);
    }

    m_opacityNode = d->opacityNode();
    if (!m_opacityNode) {
        m_opacityNode = new QSGOpacityNode();
        d->extra.value().opacityNode = m_opacityNode;

        QSGNode *child = d->clipNode();
        if (!child)
            child = d->rootNode();
        if (!child)
            child = d->groupNode;

        if (child) {
            if (child->parent())
                child->parent()->removeChildNode(child);
            m_opacityNode->appendChildNode(child);
        }

        d->itemNode()->appendChildNode(m_opacityNode);
    }
}

QSGNode *QuickSceneGraphModel::currentRootNode() const
{
    if (!m_window)
        return nullptr;

    QQuickItem *item = m_window->contentItem();
    QQuickItemPrivate *itemPriv = QQuickItemPrivate::get(item);
    QSGNode *root = itemPriv->itemNode();
    while (root->parent()) // Ensure that we really get the very root node.
        root = root->parent();
    return root;
}

void QuickSceneGraphModel::updateSGTree()
{
  QQuickItem *item = m_window->contentItem();
  QQuickItemPrivate *itemPriv = QQuickItemPrivate::get(item);
  QSGNode *rootNode = itemPriv->itemNode();
  while(rootNode->parent()) // Ensure that we really get the very root node.
      rootNode = rootNode->parent();
  m_oldChildParentMap = m_childParentMap;
  m_oldParentChildMap = m_parentChildMap;
  m_childParentMap = QHash<QSGNode*, QSGNode*>();
  m_parentChildMap = QHash<QSGNode*, QVector<QSGNode*> >();
  m_childParentMap[m_rootNode] = 0;
  m_parentChildMap[0].append(m_rootNode);

  populateFromNode(m_rootNode);
  collectItemNodes(m_window->contentItem());
}

/* Search through the node set and remove nodes that are leaves of other
   nodes in the same set.
 */
QSet<QSGNode *> qsg_simplerenderer_updateRoots(const QSet<QSGNode *> &nodes, QSGRootNode *root)
{
    QSet<QSGNode *> result = nodes;
    foreach (QSGNode *node, nodes) {
        QSGNode *n = node;
        while (n != root) {
            if (result.contains(n)) {
                result.remove(node);
                break;
            }
            n = n->parent();
        }
    }

QSGNode *QQuickTextField::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *data)
{
    QQuickDefaultClipNode *clipNode = static_cast<QQuickDefaultClipNode *>(oldNode);
    if (!clipNode)
        clipNode = new QQuickDefaultClipNode(QRectF());

    clipNode->setRect(clipRect().adjusted(leftPadding(), topPadding(), -rightPadding(), -bottomPadding()));
    clipNode->update();

    QSGNode *textNode = QQuickTextInput::updatePaintNode(clipNode->firstChild(), data);
    if (!textNode->parent())
        clipNode->appendChildNode(textNode);

    return clipNode;
}

void HsQMLCanvasBackEnd::doRendering()
{
    if (!mGL) {
        mGL = mWindow->openglContext();
        QObject::connect(
            mGL, SIGNAL(aboutToBeDestroyed()), this, SLOT(doCleanup()));
        HsQMLGLCanvasType ctype;
        QSurfaceFormat format = mGL->format();
        switch (format.renderableType()) {
            case QSurfaceFormat::OpenGL: ctype = HSQML_GL_DESKTOP; break;
            case QSurfaceFormat::OpenGLES: ctype = HSQML_GL_ES; break;
            default: setStatus(HsQMLCanvas::BadConfig); return;
        }
        mGLViewportFn = reinterpret_cast<GLViewportFn>(
            mGL->getProcAddress("glViewport"));
        mGLClearColorFn = reinterpret_cast<GLClearColorFn>(
            mGL->getProcAddress("glClearColor"));
        mGLClearFn = reinterpret_cast<GLClearFn>(
            mGL->getProcAddress("glClear"));
        if (!mGLViewportFn || !mGLClearColorFn || !mGLClearFn) {
            setStatus(HsQMLCanvas::BadProcs);
            return;
        }
        mGLCallbacks->mSetupCb(
            ctype, format.majorVersion(), format.minorVersion());
    }

    // Reset OpenGL state before rendering
#if QT_VERSION >= 0x050200
    mWindow->resetOpenGLState();
#else
#warning Resetting OpenGL state requires Qt 5.2 or later
#endif

    // Clear window if painting below the scenegraph
    if (mWinInfo.needsBelowClear()) {
        QColor bg = mWindow->color();
        mGLClearColorFn(bg.redF(), bg.greenF(), bg.blueF(), bg.alphaF());
        mGLClearFn(GL_COLOR_BUFFER_BIT);
    }

    // Setup prior to paint callback
    QMatrix4x4 matrix;
    bool inlineMode = HsQMLCanvas::Inline == mDisplayMode;
    if (inlineMode) {
        if (!mFBO->bind()) {
            setStatus(HsQMLCanvas::BadBind);
            return;
        }
        mGLViewportFn(0, 0, qCeil(mCanvasWidth), qCeil(mCanvasHeight));

        // Clear FBO to transparent
        mGLClearColorFn(0, 0, 0, 0);
        mGLClearFn(GL_COLOR_BUFFER_BIT);
    }
    else {
        // Calculate matrix for non-inline display modes
        QMatrix4x4 smatrix;
        QSGNode* node = mTransformNode;
        while (node) {
            if (QSGNode::TransformNodeType == node->type()) {
                QSGTransformNode* tnode = static_cast<QSGTransformNode*>(node);
                smatrix = tnode->matrix() * smatrix;
            }
            node = node->parent();
        }
        matrix.translate(-1, 1);
        matrix.scale(2.0f/mWindow->width(), -2.0f/mWindow->height());
        matrix *= smatrix;
        matrix.scale(mItemWidth/2.0f, mItemHeight/2.0f);
        matrix.translate(1, 1);

        mGLViewportFn(0, 0, mWindow->width(), mWindow->height());
    }

    setStatus(HsQMLCanvas::Okay);
    mGLCallbacks->mPaintCb(matrix.data(), mItemWidth, mItemHeight);

    if (inlineMode) {
        mFBO->release();
    }
}