- Qt 6.10
- Qt SVG
- C++ Classes
- QtSvgWidgets
- QSvgWidget
- Qt 6.10.2 Reference Documentation

# QSvgWidget Class

The QSvgWidget class provides a widget that is used to display the contents of Scalable Vector Graphics (SVG) files. More...

Header: | `#include <QSvgWidget>`
CMake: | `find_package(Qt6 REQUIRED COMPONENTS SvgWidgets)` `target_link_libraries(mytarget PRIVATE Qt6::SvgWidgets)`
qmake: | `QT += svgwidgets`

- List of all members, including inherited members

## Public Functions

| QSvgWidget(QWidget *parent = nullptr)
| QSvgWidget(const QString &file, QWidget *parent = nullptr)
virtual | ~QSvgWidget()
`(since 6.7)` QtSvg::Options | options() const
QSvgRenderer * | renderer() const
`(since 6.7)` void | setOptions(QtSvg::Options options)

## Reimplemented Public Functions

virtual QSize | sizeHint() const override

## Public Slots

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

## Reimplemented Protected Functions

virtual void | paintEvent(QPaintEvent *event) override

## Detailed Description

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() function.

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.

See also QSvgRenderer, Qt SVG C++ Classes, and QPicture.

## Member Function Documentation

### QSvgWidget::QSvgWidget(QWidget *parent = nullptr)

Constructs a new SVG display widget with the given parent.

### 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.

### `[virtual noexcept]` QSvgWidget::~QSvgWidget()

Destroys the widget.

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

Loads the specified SVG format contents and updates the widget.

Note: This slot is overloaded. To connect to this slot:

     // Connect using qOverload:
     connect(sender, &SenderClass::signal,
             svgWidget, qOverload<const QByteArray &>(&QSvgWidget::load));

     // Or using a lambda as wrapper:
     connect(sender, &SenderClass::signal,
             svgWidget, [receiver = svgWidget](const QByteArray &contents) { receiver->load(contents); });

For more examples and approaches, see connecting to overloaded slots.

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

Loads the contents of the specified SVG file and updates the widget.

Note: This slot is overloaded. To connect to this slot:

     // Connect using qOverload:
     connect(sender, &SenderClass::signal,
             svgWidget, qOverload<const QString &>(&QSvgWidget::load));

     // Or using a lambda as wrapper:
     connect(sender, &SenderClass::signal,
             svgWidget, [receiver = svgWidget](const QString &file) { receiver->load(file); });

For more examples and approaches, see connecting to overloaded slots.

### `[since 6.7]` QtSvg::Options QSvgWidget::options() const

Returns the options of the widget's renderer.

This function was introduced in Qt 6.7.

See also setOptions.

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

### QSvgRenderer *QSvgWidget::renderer() const

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

### `[since 6.7]` void QSvgWidget::setOptions(QtSvg::Options options)

Sets the widget's renderer options to options.

This property holds a set of QtSvg::Option flags that can be used to enable or disable various features of the parsing and rendering of SVG files. It must be set before calling the load function to have any effect.

By default, no flags are set.

This function was introduced in Qt 6.7.

See also options.

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