内容

• 公共函数
• 重实现公共函数
• 公共槽
• 重实现保护函数
• 详细描述

QSvgWidget 类

QSvgWidget 类提供用于显示 SVG (可伸缩向量图形) 文件内容的 Widget。 更多...

头：	#include <QSvgWidget>
qmake:	QT += svg
Since:	Qt 4.1
继承：	QWidget

该类在 Qt 4.1 引入。

• 所有成员列表，包括继承成员

公共函数

	QSvgWidget (const QString & file , QWidget * parent = nullptr)
	QSvgWidget (QWidget * parent = nullptr)
virtual	~QSvgWidget ()
QSvgRenderer *	renderer () const

重实现公共函数

virtual QSize

sizeHint () const override

公共槽

void	load (const QByteArray & contents )
void	load (const QString & file )

重实现保护函数

virtual void

paintEvent (QPaintEvent * event ) override

详细描述

This class enables developers to display SVG drawings alongside standard widgets, and is used in much the same way as QLabel is used for displaying text and bitmap images.

Since QSvgWidget is a subclass of QWidget , SVG drawings are rendered using the properties of the display. More control can be exercised over the rendering process with the QSvgRenderer class, as this can be used to paint onto other paint devices, such as QImage and QGLWidget. The renderer used by the widget can be obtained with the renderer () 函数。

Each QSvgWidget can be constructed with the file name of a SVG file, or they can be constructed without a specific file to render and one can be supplied later. The load () functions provide two different ways to load an SVG file: they accept either the file name of an SVG file or a QByteArray containing the serialized XML representation of an SVG file.

By default, the widget provides a size hint to reflect the size of the drawing that it displays. If no data has been loaded, the widget provides the default QWidget size hint. Subclass this class and reimplement sizeHint () if you need to customize this behavior.

另请参阅 QSvgRenderer , Qt SVG C++ 类 ，和 QPicture .

成员函数文档编制

QSvgWidget:: QSvgWidget (const QString & file , QWidget * parent = nullptr)

Constructs a new SVG display widget with the given parent and loads the contents of the specified file .

QSvgWidget:: QSvgWidget ( QWidget * parent = nullptr)

Constructs a new SVG display widget with the given parent .

[slot] void QSvgWidget:: load (const QByteArray & contents )

加载指定 SVG 格式 contents 和更新 Widget。

[slot] void QSvgWidget:: load (const QString & file )

Loads the contents of the specified SVG file 和更新 Widget。

[virtual] QSvgWidget:: ~QSvgWidget ()

销毁 Widget。

[override virtual protected] void QSvgWidget:: paintEvent ( QPaintEvent * event )

重实现： QWidget::paintEvent (QPaintEvent *event).

QSvgRenderer *QSvgWidget:: renderer () const

Returns the renderer used to display the contents of the widget.

[override virtual] QSize QSvgWidget:: sizeHint () const

重实现访问函数为特性： QWidget::sizeHint .