QTextBrowser

The QTextBrowser class provides a rich text browser with hypertext navigation. More…

Synopsis

Functions

• def backwardHistoryCount ()

• def clearHistory ()

• def forwardHistoryCount ()

• def historyTitle (arg__1)

• def historyUrl (arg__1)

• def isBackwardAvailable ()

• def isForwardAvailable ()

• def openExternalLinks ()

• def openLinks ()

• def searchPaths ()

• def setOpenExternalLinks (open)

• def setOpenLinks (open)

• def setSearchPaths (paths)

• def source ()

• def sourceType ()

Virtual functions

• def backward ()

• def doSetSource (name[, type=QTextDocument.UnknownResource])

• def forward ()

• def home ()

• def reload ()

Slots

• def setSource (name[, type=QTextDocument.UnknownResource])

Signals

• def anchorClicked (arg__1)

• def backwardAvailable (arg__1)

• def forwardAvailable (arg__1)

• def highlighted (arg__1)

• def historyChanged ()

• def sourceChanged (arg__1)

Detailed Description

This class extends QTextEdit (in read-only mode), adding some navigation functionality so that users can follow links in hypertext documents.

If you want to provide your users with an editable rich text editor, use QTextEdit . If you want a text browser without hypertext navigation use QTextEdit , and use setReadOnly() to disable editing. If you just need to display a small piece of rich text use QLabel .

Document Source and Contents

The contents of QTextEdit are set with setHtml() or setPlainText() , but QTextBrowser also implements the setSource() function, making it possible to use a named document as the source text. The name is looked up in a list of search paths and in the directory of the current document factory.

If a document name ends with an anchor (for example, “#anchor"), the text browser automatically scrolls to that position (using scrollToAnchor() ). When the user clicks on a hyperlink, the browser will call setSource() itself with the link’s href value as argument. You can track the current source by connecting to the sourceChanged() signal.

Navigation

QTextBrowser provides backward() and forward() slots which you can use to implement Back and Forward buttons. The home() slot sets the text to the very first document displayed. The anchorClicked() signal is emitted when the user clicks an anchor. To override the default navigation behavior of the browser, call the setSource() function to supply new document text in a slot connected to this signal.

If you want to load documents stored in the Qt resource system use qrc as the scheme in the URL to load. For example, for the document resource path :/docs/index.html use qrc:/docs/index.html as the URL with setSource() .

See also

QTextEdit QTextDocument

class PySide6.QtWidgets.QTextBrowser([parent=None])

Parameters

parent – PySide6.QtWidgets.QWidget

Constructs an empty QTextBrowser with parent parent.

PySide6.QtWidgets.QTextBrowser.anchorClicked(arg__1)

Parameters

arg__1 – PySide6.QtCore.QUrl

PySide6.QtWidgets.QTextBrowser.backward()

Changes the document displayed to the previous document in the list of documents built by navigating links. Does nothing if there is no previous document.

See also

forward() backwardAvailable()

PySide6.QtWidgets.QTextBrowser.backwardAvailable(arg__1)

Parameters

arg__1 – bool

PySide6.QtWidgets.QTextBrowser.backwardHistoryCount()

Return type

int

Returns the number of locations backward in the history.

PySide6.QtWidgets.QTextBrowser.clearHistory()

Clears the history of visited documents and disables the forward and backward navigation.

See also

backward() forward()

PySide6.QtWidgets.QTextBrowser.doSetSource(name[, type=QTextDocument.UnknownResource])

Parameters

• name – PySide6.QtCore.QUrl

• type – ResourceType

Attempts to load the document at the given url with the specified type.

setSource() calls . In Qt 5, setSource (const QUrl &url) was virtual. In Qt 6, is virtual instead, so that it can be overridden in subclasses.

PySide6.QtWidgets.QTextBrowser.forward()

Changes the document displayed to the next document in the list of documents built by navigating links. Does nothing if there is no next document.

See also

backward() forwardAvailable()

PySide6.QtWidgets.QTextBrowser.forwardAvailable(arg__1)

Parameters

arg__1 – bool

PySide6.QtWidgets.QTextBrowser.forwardHistoryCount()

Return type

int

Returns the number of locations forward in the history.

PySide6.QtWidgets.QTextBrowser.highlighted(arg__1)

Parameters

arg__1 – PySide6.QtCore.QUrl

PySide6.QtWidgets.QTextBrowser.historyChanged()

PySide6.QtWidgets.QTextBrowser.historyTitle(arg__1)

Parameters

arg__1 – int

Return type

str

Returns the documentTitle() of the HistoryItem.

Input	Return
i < 0	backward() history
i == 0	current, see source()
i > 0	forward() history

backaction.setToolTip(browser.historyTitle(-1))
forwardaction.setToolTip(browser.historyTitle(+1))

PySide6.QtWidgets.QTextBrowser.historyUrl(arg__1)

Parameters

arg__1 – int

Return type

PySide6.QtCore.QUrl

Returns the url of the HistoryItem.

Input	Return
i < 0	backward() history
i == 0	current, see source()
i > 0	forward() history

PySide6.QtWidgets.QTextBrowser.home()

Changes the document displayed to be the first document from the history.

PySide6.QtWidgets.QTextBrowser.isBackwardAvailable()

Return type

bool

Returns true if the text browser can go backward in the document history using backward() .

See also

backwardAvailable() backward()

PySide6.QtWidgets.QTextBrowser.isForwardAvailable()

Return type

bool

Returns true if the text browser can go forward in the document history using forward() .

See also

forwardAvailable() forward()

PySide6.QtWidgets.QTextBrowser.openExternalLinks()

Return type

bool

Specifies whether QTextBrowser should automatically open links to external sources using openUrl() instead of emitting the anchorClicked signal. Links are considered external if their scheme is neither file or qrc.

The default value is false.

PySide6.QtWidgets.QTextBrowser.openLinks()

Return type

bool

This property specifies whether QTextBrowser should automatically open links the user tries to activate by mouse or keyboard.

Regardless of the value of this property the anchorClicked signal is always emitted.

The default value is true.

PySide6.QtWidgets.QTextBrowser.reload()

Reloads the current set source.

PySide6.QtWidgets.QTextBrowser.searchPaths()

Return type

list of strings

This property holds the search paths used by the text browser to find supporting content.

QTextBrowser uses this list to locate images and documents.

By default, this property contains an empty string list.

PySide6.QtWidgets.QTextBrowser.setOpenExternalLinks(open)

Parameters

open – bool

Specifies whether QTextBrowser should automatically open links to external sources using openUrl() instead of emitting the anchorClicked signal. Links are considered external if their scheme is neither file or qrc.

The default value is false.

PySide6.QtWidgets.QTextBrowser.setOpenLinks(open)

Parameters

open – bool

This property specifies whether QTextBrowser should automatically open links the user tries to activate by mouse or keyboard.

Regardless of the value of this property the anchorClicked signal is always emitted.

The default value is true.

PySide6.QtWidgets.QTextBrowser.setSearchPaths(paths)

Parameters

paths – list of strings

This property holds the search paths used by the text browser to find supporting content.

QTextBrowser uses this list to locate images and documents.

By default, this property contains an empty string list.

PySide6.QtWidgets.QTextBrowser.setSource(name[, type=QTextDocument.UnknownResource])

Parameters

• name – PySide6.QtCore.QUrl

• type – ResourceType

Attempts to load the document at the given url with the specified type.

If type is UnknownResource (the default), the document type will be detected: that is, if the url ends with an extension of .md, .mkd or .markdown, the document will be loaded via setMarkdown() ; otherwise it will be loaded via setHtml() . This detection can be bypassed by specifying the type explicitly.

See also

source()

PySide6.QtWidgets.QTextBrowser.source()

Return type

PySide6.QtCore.QUrl

This property holds the name of the displayed document..

This is a an invalid url if no document is displayed or if the source is unknown.

When setting this property QTextBrowser tries to find a document with the specified name in the paths of the searchPaths property and directory of the current source, unless the value is an absolute file path. It also checks for optional anchors and scrolls the document accordingly

If the first tag in the document is <qt type=detail>, the document is displayed as a popup rather than as new document in the browser window itself. Otherwise, the document is displayed normally in the text browser with the text set to the contents of the named document with setHtml() or setMarkdown() , depending on whether the filename ends with any of the known Markdown file extensions.

If you would like to avoid automatic type detection and specify the type explicitly, call setSource() rather than setting this property.

By default, this property contains an empty URL.

PySide6.QtWidgets.QTextBrowser.sourceChanged(arg__1)

Parameters

arg__1 – PySide6.QtCore.QUrl

PySide6.QtWidgets.QTextBrowser.sourceType()

Return type

ResourceType

This property holds the type of the displayed document.

This is UnknownResource if no document is displayed or if the type of the source is unknown. Otherwise it holds the type that was detected, or the type that was specified when setSource() was called.