内容

• 特性
• 公共函数
• 信号
• 静态公共成员
• 详细描述

QQuickItemGrabResult Class

The QQuickItemGrabResult contains the result from QQuickItem::grabToImage (). 更多...

头：	#include <QQuickItemGrabResult>
qmake:	QT += quick
实例化：	ItemGrabResult
继承：	QObject

• 所有成员列表，包括继承成员
• 过时成员

特性

• image : const QImage
• url : const QUrl

• 1 特性继承自 QObject

公共函数

QImage	image () const
bool	saveToFile (const QString & fileName ) const
QUrl	url () const

• 31 公共函数继承自 QObject

信号

void

ready ()

• 2 信号继承自 QObject

静态公共成员

const QMetaObject

staticMetaObject

• 9 静态公共成员继承自 QObject

额外继承成员

• 1 公共槽继承自 QObject
• 9 保护函数继承自 QObject

详细描述

The QQuickItemGrabResult contains the result from QQuickItem::grabToImage ().

另请参阅 QQuickItem::grabToImage ().

特性文档编制

image : const QImage

This property holds the pixel results from a grab.

If the grab is not yet complete or if it failed, a null image is returned ( image.isNull() 将返回 true ).

访问函数：

QImage

image () const

url : const QUrl

This property holds a URL which can be used in conjunction with URL based image consumers, such as the QtQuick::Image 类型。

The URL is valid until the QQuickItemGrabResult object is deleted.

The URL does not represent a valid file or location to read it from, it is primarily a key to access images through Qt Quick's image-based types.

访问函数：

QUrl	url () const

成员函数文档编制

[signal] void QQuickItemGrabResult:: ready ()

This signal is emitted when the grab has completed.

bool QQuickItemGrabResult:: saveToFile (const QString & fileName ) const

Saves the grab result as an image to fileName . Returns true if successful; otherwise returns false.

注意： In Qt versions prior to 5.9, this function is marked as non- const .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .