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QTextBrowser Class Reference

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

#include <qtextbrowser.h>

Inherits QTextEdit.

List of all member functions.

Public Members

• QTextBrowser ( QWidget * parent = 0, const char * name = 0 )
• QString source () const

Public Slots

• virtual void setSource ( const QString & name )
• virtual void backward ()
• virtual void forward ()
• virtual void home ()
• virtual void reload ()

Signals

• void backwardAvailable ( bool available )
• void forwardAvailable ( bool available )
• void highlighted ( const QString & href )
• void linkClicked ( const QString & link )

Properties

• QString source - the name of the currently displayed document

Protected Members

• virtual void keyPressEvent ( QKeyEvent * e )

Detailed Description

This class extends QTextEdit (in read-only mode), adding some navigation functionality so that users can follow links in hypertext documents. The contents of QTextEdit is set with setText(), but QTextBrowser has an additional function, setSource(), which makes it possible to set the text to a named document. The name is looked up in the text view's mime source 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.

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 linkClicked() signal is emitted when the user clicks a link.

By using QTextEdit::setMimeSourceFactory() you can provide your own subclass of QMimeSourceFactory. This makes it possible to access data from anywhere, for example from a network or from a database. See QMimeSourceFactory::data() for details.

If you intend using the mime factory to read the data directly from the file system, you may have to specify the encoding for the file extension you are using. For example:

  mimeSourceFactory()->setExtensionType("qml", "text/utf8");
  

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

See also Advanced Widgets, Help System and Text Related Classes.

Member Function Documentation

QTextBrowser::QTextBrowser ( QWidget * parent = 0, const char * name = 0 )

void QTextBrowser::backward () [virtual slot]

See also forward() and backwardAvailable().

Example: helpviewer/helpwindow.cpp.

void QTextBrowser::backwardAvailable ( bool available ) [signal]

This signal is emitted when the availability of the backward() changes. available is FALSE when the user is at home(); otherwise it is TRUE.

Example: helpviewer/helpwindow.cpp.

void QTextBrowser::forward () [virtual slot]

See also backward() and forwardAvailable().

Example: helpviewer/helpwindow.cpp.

void QTextBrowser::forwardAvailable ( bool available ) [signal]

This signal is emitted when the availability of the forward() changes. available is TRUE after the user navigates backward() and FALSE when the user navigates or goes forward().

Example: helpviewer/helpwindow.cpp.

void QTextBrowser::highlighted ( const QString & href ) [signal]

This signal is emitted when the user has selected but not activated a link in the document. href is the value of the href tag in the link.

Example: helpviewer/helpwindow.cpp.

void QTextBrowser::home () [virtual slot]

Example: helpviewer/helpwindow.cpp.

void QTextBrowser::keyPressEvent ( QKeyEvent * e ) [virtual protected]

• Alt+Left Arrow - backward()
• Alt+Right Arrow - forward()
• Alt+Up Arrow - home()

Reimplemented from QTextEdit.

void QTextBrowser::linkClicked ( const QString & link ) [signal]

This signal is emitted when the user clicks a link. The link is the value of the href i.e. the name of the target document.

void QTextBrowser::reload () [virtual slot]

void QTextBrowser::setSource ( const QString & name ) [virtual slot]

Sets the name of the currently displayed document to name. See the "source" property for details.

QString QTextBrowser::source () const

Returns the name of the currently displayed document. See the "source" property for details.

Property Documentation

QString source

This property holds the name of the currently displayed document.

This is a null string if no document is displayed or the source is unknown.

Setting this property uses the mimeSourceFactory to lookup the named document. 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 setText().

If you are using the filesystem access capabilities of the mime source factory, you must ensure that the factory knows about the encoding of specified files; otherwise no data will be available. The default factory handles a couple of common file extensions such as *.html and *.txt with reasonable defaults. See QMimeSourceFactory::data() for details.

Set this property's value with setSource() and get this property's value with source().

This file is part of the Qt toolkit. Copyright © 1995-2002 Trolltech. All Rights Reserved.