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Diffstat (limited to 'src/qtquick1/graphicsitems/qdeclarativeloader.cpp')
| -rw-r--r-- | src/qtquick1/graphicsitems/qdeclarativeloader.cpp | 602 |
1 files changed, 0 insertions, 602 deletions
diff --git a/src/qtquick1/graphicsitems/qdeclarativeloader.cpp b/src/qtquick1/graphicsitems/qdeclarativeloader.cpp deleted file mode 100644 index e14c1b8f0e..0000000000 --- a/src/qtquick1/graphicsitems/qdeclarativeloader.cpp +++ /dev/null @@ -1,602 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/ -** -** 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 "QtQuick1/private/qdeclarativeloader_p_p.h" - -#include <QtDeclarative/qdeclarativeinfo.h> -#include <QtDeclarative/private/qdeclarativeengine_p.h> -#include <QtDeclarative/private/qdeclarativeglobal_p.h> - -QT_BEGIN_NAMESPACE - - - -QDeclarative1LoaderPrivate::QDeclarative1LoaderPrivate() - : item(0), component(0), ownComponent(false), updatingSize(false), - itemWidthValid(false), itemHeightValid(false) -{ -} - -QDeclarative1LoaderPrivate::~QDeclarative1LoaderPrivate() -{ -} - -void QDeclarative1LoaderPrivate::itemGeometryChanged(QDeclarativeItem *resizeItem, const QRectF &newGeometry, const QRectF &oldGeometry) -{ - if (resizeItem == item) { - if (!updatingSize && newGeometry.width() != oldGeometry.width()) - itemWidthValid = true; - if (!updatingSize && newGeometry.height() != oldGeometry.height()) - itemHeightValid = true; - _q_updateSize(false); - } - QDeclarativeItemChangeListener::itemGeometryChanged(resizeItem, newGeometry, oldGeometry); -} - -void QDeclarative1LoaderPrivate::clear() -{ - if (ownComponent) { - component->deleteLater(); - component = 0; - ownComponent = false; - } - source = QUrl(); - - if (item) { - if (QDeclarativeItem *qmlItem = qobject_cast<QDeclarativeItem*>(item)) { - QDeclarativeItemPrivate *p = - static_cast<QDeclarativeItemPrivate *>(QGraphicsItemPrivate::get(qmlItem)); - p->removeItemChangeListener(this, QDeclarativeItemPrivate::Geometry); - } - - // We can't delete immediately because our item may have triggered - // the Loader to load a different item. - if (item->scene()) { - item->scene()->removeItem(item); - } else { - item->setParentItem(0); - item->setVisible(false); - } - item->deleteLater(); - item = 0; - } -} - -void QDeclarative1LoaderPrivate::initResize() -{ - Q_Q(QDeclarative1Loader); - if (QDeclarativeItem *qmlItem = qobject_cast<QDeclarativeItem*>(item)) { - QDeclarativeItemPrivate *p = - static_cast<QDeclarativeItemPrivate *>(QGraphicsItemPrivate::get(qmlItem)); - p->addItemChangeListener(this, QDeclarativeItemPrivate::Geometry); - // We may override the item's size, so we need to remember - // whether the item provided its own valid size. - itemWidthValid = p->widthValid; - itemHeightValid = p->heightValid; - } else if (item && item->isWidget()) { - QGraphicsWidget *widget = static_cast<QGraphicsWidget*>(item); - widget->installEventFilter(q); - } - _q_updateSize(); -} - -/*! - \qmlclass Loader QDeclarative1Loader - \inqmlmodule QtQuick 1 - \ingroup qml-utility-elements - \since QtQuick 1.0 - \inherits Item - - \brief The Loader item allows dynamically loading an Item-based - subtree from a URL or Component. - - Loader is used to dynamically load visual QML components. It can load a - QML file (using the \l source property) or a \l Component object (using - the \l sourceComponent property). It is useful for delaying the creation - of a component until it is required: for example, when a component should - be created on demand, or when a component should not be created - unnecessarily for performance reasons. - - Here is a Loader that loads "Page1.qml" as a component when the - \l MouseArea is clicked: - - \snippet doc/src/snippets/qtquick1/loader/simple.qml 0 - - The loaded item can be accessed using the \l item property. - - If the \l source or \l sourceComponent changes, any previously instantiated - items are destroyed. Setting \l source to an empty string or setting - \l sourceComponent to \c undefined destroys the currently loaded item, - freeing resources and leaving the Loader empty. - - \section2 Loader sizing behavior - - Loader is like any other visual item and must be positioned and sized - accordingly to become visible. - - \list - \o If an explicit size is not specified for the Loader, the Loader - is automatically resized to the size of the loaded item once the - component is loaded. - \o If the size of the Loader is specified explicitly by setting - the width, height or by anchoring, the loaded item will be resized - to the size of the Loader. - \endlist - - In both scenarios the size of the item and the Loader are identical. - This ensures that anchoring to the Loader is equivalent to anchoring - to the loaded item. - - \table - \row - \o sizeloader.qml - \o sizeitem.qml - \row - \o \snippet doc/src/snippets/qtquick1/loader/sizeloader.qml 0 - \o \snippet doc/src/snippets/qtquick1/loader/sizeitem.qml 0 - \row - \o The red rectangle will be sized to the size of the root item. - \o The red rectangle will be 50x50, centered in the root item. - \endtable - - - \section2 Receiving signals from loaded items - - Any signals emitted from the loaded item can be received using the - \l Connections element. For example, the following \c application.qml - loads \c MyItem.qml, and is able to receive the \c message signal from - the loaded item through a \l Connections object: - - \table - \row - \o application.qml - \o MyItem.qml - \row - \o \snippet doc/src/snippets/qtquick1/loader/connections.qml 0 - \o \snippet doc/src/snippets/qtquick1/loader/MyItem.qml 0 - \endtable - - Alternatively, since \c MyItem.qml is loaded within the scope of the - Loader, it could also directly call any function defined in the Loader or - its parent \l Item. - - - \section2 Focus and key events - - Loader is a focus scope. Its \l {Item::}{focus} property must be set to - \c true for any of its children to get the \e {active focus}. (See - \l{qmlfocus#Acquiring Focus and Focus Scopes}{the focus documentation page} - for more details.) Any key events received in the loaded item should likely - also be \l {KeyEvent::}{accepted} so they are not propagated to the Loader. - - For example, the following \c application.qml loads \c KeyReader.qml when - the \l MouseArea is clicked. Notice the \l {Item::}{focus} property is - set to \c true for the Loader as well as the \l Item in the dynamically - loaded object: - - \table - \row - \o application.qml - \o KeyReader.qml - \row - \o \snippet doc/src/snippets/qtquick1/loader/focus.qml 0 - \o \snippet doc/src/snippets/qtquick1/loader/KeyReader.qml 0 - \endtable - - Once \c KeyReader.qml is loaded, it accepts key events and sets - \c event.accepted to \c true so that the event is not propagated to the - parent \l Rectangle. - - \sa {dynamic-object-creation}{Dynamic Object Creation} -*/ - -QDeclarative1Loader::QDeclarative1Loader(QDeclarativeItem *parent) - : QDeclarative1ImplicitSizeItem(*(new QDeclarative1LoaderPrivate), parent) -{ - Q_D(QDeclarative1Loader); - d->flags |= QGraphicsItem::ItemIsFocusScope; -} - -QDeclarative1Loader::~QDeclarative1Loader() -{ - Q_D(QDeclarative1Loader); - if (d->item) { - if (QDeclarativeItem *qmlItem = qobject_cast<QDeclarativeItem*>(d->item)) { - QDeclarativeItemPrivate *p = - static_cast<QDeclarativeItemPrivate *>(QGraphicsItemPrivate::get(qmlItem)); - p->removeItemChangeListener(d, QDeclarativeItemPrivate::Geometry); - } - } -} - -/*! - \qmlproperty url QtQuick1::Loader::source - This property holds the URL of the QML component to instantiate. - - Note the QML component must be an \l{Item}-based component. The loader - cannot load non-visual components. - - To unload the currently loaded item, set this property to an empty string, - or set \l sourceComponent to \c undefined. Setting \c source to a - new URL will also cause the item created by the previous URL to be unloaded. - - \sa sourceComponent, status, progress -*/ -QUrl QDeclarative1Loader::source() const -{ - Q_D(const QDeclarative1Loader); - return d->source; -} - -void QDeclarative1Loader::setSource(const QUrl &url) -{ - Q_D(QDeclarative1Loader); - if (d->source == url) - return; - - d->clear(); - - d->source = url; - - if (d->source.isEmpty()) { - emit sourceChanged(); - emit statusChanged(); - emit progressChanged(); - emit itemChanged(); - return; - } - - d->component = new QDeclarativeComponent(qmlEngine(this), d->source, this); - d->ownComponent = true; - - if (isComponentComplete()) - d->load(); -} - -/*! - \qmlproperty Component QtQuick1::Loader::sourceComponent - This property holds the \l{Component} to instantiate. - - \qml - Item { - Component { - id: redSquare - Rectangle { color: "red"; width: 10; height: 10 } - } - - Loader { sourceComponent: redSquare } - Loader { sourceComponent: redSquare; x: 10 } - } - \endqml - - To unload the currently loaded item, set this property to an empty string - or \c undefined. - - \sa source, progress -*/ - -QDeclarativeComponent *QDeclarative1Loader::sourceComponent() const -{ - Q_D(const QDeclarative1Loader); - return d->component; -} - -void QDeclarative1Loader::setSourceComponent(QDeclarativeComponent *comp) -{ - Q_D(QDeclarative1Loader); - if (comp == d->component) - return; - - d->clear(); - - d->component = comp; - d->ownComponent = false; - - if (!d->component) { - emit sourceChanged(); - emit statusChanged(); - emit progressChanged(); - emit itemChanged(); - return; - } - - if (isComponentComplete()) - d->load(); -} - -void QDeclarative1Loader::resetSourceComponent() -{ - setSourceComponent(0); -} - -void QDeclarative1LoaderPrivate::load() -{ - Q_Q(QDeclarative1Loader); - - if (!q->isComponentComplete() || !component) - return; - - if (!component->isLoading()) { - _q_sourceLoaded(); - } else { - QObject::connect(component, SIGNAL(statusChanged(QDeclarativeComponent::Status)), - q, SLOT(_q_sourceLoaded())); - QObject::connect(component, SIGNAL(progressChanged(qreal)), - q, SIGNAL(progressChanged())); - emit q->statusChanged(); - emit q->progressChanged(); - emit q->sourceChanged(); - emit q->itemChanged(); - } -} - -void QDeclarative1LoaderPrivate::_q_sourceLoaded() -{ - Q_Q(QDeclarative1Loader); - - if (component) { - if (!component->errors().isEmpty()) { - QDeclarativeEnginePrivate::warning(qmlEngine(q), component->errors()); - emit q->sourceChanged(); - emit q->statusChanged(); - emit q->progressChanged(); - return; - } - - QDeclarativeContext *creationContext = component->creationContext(); - if (!creationContext) creationContext = qmlContext(q); - QDeclarativeContext *ctxt = new QDeclarativeContext(creationContext); - ctxt->setContextObject(q); - - QDeclarativeGuard<QDeclarativeComponent> c = component; - QObject *obj = component->beginCreate(ctxt); - if (component != c) { - // component->create could trigger a change in source that causes - // component to be set to something else. In that case we just - // need to cleanup. - if (c) - c->completeCreate(); - delete obj; - delete ctxt; - return; - } - if (obj) { - item = qobject_cast<QGraphicsObject *>(obj); - if (item) { - QDeclarative_setParent_noEvent(ctxt, obj); - QDeclarative_setParent_noEvent(item, q); - item->setParentItem(q); -// item->setFocus(true); - initResize(); - } else { - qmlInfo(q) << QDeclarative1Loader::tr("Loader does not support loading non-visual elements."); - delete obj; - delete ctxt; - } - } else { - if (!component->errors().isEmpty()) - QDeclarativeEnginePrivate::warning(qmlEngine(q), component->errors()); - delete obj; - delete ctxt; - source = QUrl(); - } - component->completeCreate(); - emit q->sourceChanged(); - emit q->statusChanged(); - emit q->progressChanged(); - emit q->itemChanged(); - emit q->loaded(); - } -} - -/*! - \qmlproperty enumeration QtQuick1::Loader::status - - This property holds the status of QML loading. It can be one of: - \list - \o Loader.Null - no QML source has been set - \o Loader.Ready - the QML source has been loaded - \o Loader.Loading - the QML source is currently being loaded - \o Loader.Error - an error occurred while loading the QML source - \endlist - - Use this status to provide an update or respond to the status change in some way. - For example, you could: - - \list - \o Trigger a state change: - \qml - State { name: 'loaded'; when: loader.status == Loader.Ready } - \endqml - - \o Implement an \c onStatusChanged signal handler: - \qml - Loader { - id: loader - onStatusChanged: if (loader.status == Loader.Ready) console.log('Loaded') - } - \endqml - - \o Bind to the status value: - \qml - Text { text: loader.status == Loader.Ready ? 'Loaded' : 'Not loaded' } - \endqml - \endlist - - Note that if the source is a local file, the status will initially be Ready (or Error). While - there will be no onStatusChanged signal in that case, the onLoaded will still be invoked. - - \sa progress -*/ - -QDeclarative1Loader::Status QDeclarative1Loader::status() const -{ - Q_D(const QDeclarative1Loader); - - if (d->component) - return static_cast<QDeclarative1Loader::Status>(d->component->status()); - - if (d->item) - return Ready; - - return d->source.isEmpty() ? Null : Error; -} - -void QDeclarative1Loader::componentComplete() -{ - Q_D(QDeclarative1Loader); - - QDeclarativeItem::componentComplete(); - d->load(); -} - - -/*! - \qmlsignal QtQuick1::Loader::onLoaded() - - This handler is called when the \l status becomes \c Loader.Ready, or on successful - initial load. -*/ - - -/*! -\qmlproperty real QtQuick1::Loader::progress - -This property holds the progress of loading QML data from the network, from -0.0 (nothing loaded) to 1.0 (finished). Most QML files are quite small, so -this value will rapidly change from 0 to 1. - -\sa status -*/ -qreal QDeclarative1Loader::progress() const -{ - Q_D(const QDeclarative1Loader); - - if (d->item) - return 1.0; - - if (d->component) - return d->component->progress(); - - return 0.0; -} - -void QDeclarative1LoaderPrivate::_q_updateSize(bool loaderGeometryChanged) -{ - Q_Q(QDeclarative1Loader); - if (!item || updatingSize) - return; - - updatingSize = true; - if (QDeclarativeItem *qmlItem = qobject_cast<QDeclarativeItem*>(item)) { - if (!itemWidthValid) - q->setImplicitWidth(qmlItem->implicitWidth()); - else - q->setImplicitWidth(qmlItem->width()); - if (loaderGeometryChanged && q->widthValid()) - qmlItem->setWidth(q->width()); - if (!itemHeightValid) - q->setImplicitHeight(qmlItem->implicitHeight()); - else - q->setImplicitHeight(qmlItem->height()); - if (loaderGeometryChanged && q->heightValid()) - qmlItem->setHeight(q->height()); - } else if (item && item->isWidget()) { - QGraphicsWidget *widget = static_cast<QGraphicsWidget*>(item); - QSizeF widgetSize = widget->size(); - q->setImplicitWidth(widgetSize.width()); - if (loaderGeometryChanged && q->widthValid()) - widgetSize.setWidth(q->width()); - q->setImplicitHeight(widgetSize.height()); - if (loaderGeometryChanged && q->heightValid()) - widgetSize.setHeight(q->height()); - if (widget->size() != widgetSize) - widget->resize(widgetSize); - } - updatingSize = false; -} - -/*! - \qmlproperty Item QtQuick1::Loader::item - This property holds the top-level item that is currently loaded. -*/ -QGraphicsObject *QDeclarative1Loader::item() const -{ - Q_D(const QDeclarative1Loader); - return d->item; -} - -void QDeclarative1Loader::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) -{ - Q_D(QDeclarative1Loader); - if (newGeometry != oldGeometry) { - d->_q_updateSize(); - } - QDeclarativeItem::geometryChanged(newGeometry, oldGeometry); -} - -QVariant QDeclarative1Loader::itemChange(GraphicsItemChange change, const QVariant &value) -{ - Q_D(QDeclarative1Loader); - if (change == ItemSceneHasChanged) { - if (d->item && d->item->isWidget()) { - d->item->removeEventFilter(this); - d->item->installEventFilter(this); - } - } - return QDeclarativeItem::itemChange(change, value); -} - -bool QDeclarative1Loader::eventFilter(QObject *watched, QEvent *e) -{ - Q_D(QDeclarative1Loader); - if (watched == d->item && e->type() == QEvent::GraphicsSceneResize) { - if (d->item && d->item->isWidget()) - d->_q_updateSize(false); - } - return QDeclarativeItem::eventFilter(watched, e); -} - -#include <moc_qdeclarativeloader_p.cpp> - - - -QT_END_NAMESPACE |