内容

• 公共类型
• 特性
• 公共函数
• 信号
• 详细描述

QDeclarativeView Class

The QDeclarativeView class provides a widget for displaying a Qt Declarative user interface. 更多...

头：	#include <QDeclarativeView>
Since:	Qt 4.7
继承：	QGraphicsView

• 所有成员列表，包括继承成员

公共类型

enum	ResizeMode { SizeViewToRootObject, SizeRootObjectToView }
enum	Status { Null, Ready, Loading, Error }

特性

• resizeMode : ResizeMode
• source : QUrl
• status : const Status

• 13 特性继承自 QGraphicsView
• 2 特性继承自 QAbstractScrollArea
• 6 特性继承自 QFrame
• 58 特性继承自 QWidget
• 1 特性继承自 QObject

公共函数

	QDeclarativeView (QWidget * parent = 0)
	QDeclarativeView (const QUrl & source , QWidget * parent = 0)
virtual	~QDeclarativeView ()
QDeclarativeEngine *	engine () const
QList<QDeclarativeError>	errors () const
QSize	initialSize () const
ResizeMode	resizeMode () const
QDeclarativeContext *	rootContext () const
QGraphicsObject *	rootObject () const
void	setResizeMode (ResizeMode)
void	setSource (const QUrl & url )
QUrl	source () const
状态	status () const

• 77 public functions inherited from QGraphicsView
• 17 公共函数继承自 QAbstractScrollArea
• 14 公共函数继承自 QFrame
• 220 公共函数继承自 QWidget
• 29 公共函数继承自 QObject
• 12 公共函数继承自 QPaintDevice

信号

void	sceneResized (QSize size )
void	statusChanged (QDeclarativeView::Status status )

• 1 信号继承自 QWidget
• 1 信号继承自 QObject

额外继承成员

• 3 公共槽继承自 QGraphicsView
• 19 公共槽继承自 QWidget
• 1 公共槽继承自 QObject
• 4 static public members inherited from QWidget
• 7 静态公共成员继承自 QObject
• 24 保护函数继承自 QGraphicsView
• 18 保护函数继承自 QAbstractScrollArea
• 3 保护函数继承自 QFrame
• 37 保护函数继承自 QWidget
• 8 保护函数继承自 QObject
• 1 保护函数继承自 QPaintDevice
• 1 保护槽继承自 QGraphicsView
• 1 保护槽继承自 QAbstractScrollArea
• 1 保护槽继承自 QWidget

详细描述

The QDeclarativeView class provides a widget for displaying a Qt Declarative user interface.

QDeclarativeItem objects can be placed on a standard QGraphicsScene and displayed with QGraphicsView . QDeclarativeView 是 QGraphicsView subclass provided as a convenience for displaying QML files, and connecting between QML and C++ Qt objects.

QDeclarativeView provides:

• Management of QDeclarativeComponent loading and object creation
• Initialization of QGraphicsView for optimal performance with QML using these settings:
  • QGraphicsView::setOptimizationFlags ( QGraphicsView::DontSavePainterState )
  • QGraphicsView::setViewportUpdateMode ( QGraphicsView::BoundingRectViewportUpdate )
  • QGraphicsScene::setItemIndexMethod ( QGraphicsScene::NoIndex )
• Initialization of QGraphicsView for QML key handling using these settings:
  • QGraphicsView::viewport ()-> setFocusPolicy ( Qt::NoFocus )
  • QGraphicsView::setFocusPolicy ( Qt::StrongFocus )
  • QGraphicsScene::setStickyFocus (true)

典型用法：

QDeclarativeView *view = new QDeclarativeView;
view->setSource(QUrl::fromLocalFile("myqmlfile.qml"));
view->show();
					

由于 QDeclarativeView 是 QWidget -based class, it can be used to display QML interfaces within QWidget -based GUI applications that do not use the Graphics View framework.

To receive errors related to loading and executing QML with QDeclarativeView , you can connect to the statusChanged () signal and monitor for QDeclarativeView::Error . The errors are available via QDeclarativeView::errors ().

If you're using your own QGraphicsScene -based scene with QDeclarativeView , remember to enable scene's sticky focus mode and to set itemIndexMethod to QGraphicsScene::NoIndex .

另请参阅 集成 QML 代码与现有 Qt UI 代码 and 在 C++ 应用程序中使用 QML 绑定 .

成员类型文档编制

enum QDeclarativeView:: ResizeMode

This enum specifies how to resize the view.

常量	值	描述
QDeclarativeView::SizeViewToRootObject	0	The view resizes with the root item in the QML.
QDeclarativeView::SizeRootObjectToView	1	The view will automatically resize the root item to the size of the view.

enum QDeclarativeView:: Status

Specifies the loading status of the QDeclarativeView .

常量	值	描述
QDeclarativeView::Null	0	This QDeclarativeView has no source set.
QDeclarativeView::Ready	1	This QDeclarativeView has loaded and created the QML component.
QDeclarativeView::Loading	2	This QDeclarativeView is loading network data.
QDeclarativeView::Error	3	One or more errors has occurred. Call errors () to retrieve a list of errors.

特性文档编制

resizeMode : ResizeMode

This property holds whether the view should resize the canvas contents.

If this property is set to SizeViewToRootObject (the default), the view resizes with the root item in the QML.

If this property is set to SizeRootObjectToView , the view will automatically resize the root item.

Regardless of this property, the sizeHint of the view is the initial size of the root item. Note though that since QML may load dynamically, that size may change.

访问函数：

ResizeMode	resizeMode () const
void	setResizeMode (ResizeMode)

source : QUrl

This property holds the URL of the source of the QML component.

Changing this property causes the QML component to be reloaded.

Ensure that the URL provided is full and correct, in particular, use QUrl::fromLocalFile () when loading a file from the local filesystem.

访问函数：

QUrl	source () const
void	setSource (const QUrl & url )

另请参阅 在 QML 中加载资源 .

status : const Status

The component's current status .

访问函数：

状态	status () const

通知程序信号：

void	statusChanged (QDeclarativeView::Status status )

成员函数文档编制

QDeclarativeView:: QDeclarativeView ( QWidget * parent = 0)

构造 QDeclarativeView 采用给定 parent .

QDeclarativeView:: QDeclarativeView (const QUrl & source , QWidget * parent = 0)

构造 QDeclarativeView with the given QML source and parent .

[虚拟] QDeclarativeView:: ~QDeclarativeView ()

销毁视图。

QDeclarativeEngine * QDeclarativeView:: engine () const

返回指针指向 QDeclarativeEngine used for instantiating QML Components.

QList < QDeclarativeError > QDeclarativeView:: errors () const

Return the list of errors that occurred during the last compile or create operation. When the status is not Error, an empty list is returned.

QSize QDeclarativeView:: initialSize () const

Returns the initial size of the root object

QDeclarativeContext * QDeclarativeView:: rootContext () const

This function returns the root of the context hierarchy. Each QML component is instantiated in a QDeclarativeContext . QDeclarativeContext 's are essential for passing data to QML components. In QML, contexts are arranged hierarchically and this hierarchy is managed by the QDeclarativeEngine .

QGraphicsObject * QDeclarativeView:: rootObject () const

Returns the view's root item .

[signal] void QDeclarativeView:: sceneResized ( QSize size )

This signal is emitted when the view is resized to size .