QTextEdit(3qt)

NAME
QTextEdit - Sophisticated single-page rich text editor

SYNOPSIS
#include <qtextedit.h>

Inherits QScrollView.

Inherited by QMultiLineEdit, QTextBrowser and QTextView.

  Public Members
enum WordWrap { NoWrap, WidgetWidth, FixedPixelWidth, FixedColumnWidth }
enum WrapPolicy { AtWordBoundary, Anywhere, AtWhiteSpace = AtWordBoundary }
enum KeyboardAction { ActionBackspace, ActionDelete, ActionReturn, ActionKill }
enum CursorAction { MoveBackward, MoveForward, MoveWordBackward, MoveWordForward, MoveUp, MoveDown, MoveLineStart, MoveLineEnd, MoveHome, MoveEnd, MovePgUp, MovePgDown }
enum VerticalAlignment { AlignNormal, AlignSuperScript, AlignSubScript }
QTextEdit ( const QString & text, const QString & context = QString::null, QWidget * parent = 0, const char * name = 0 )
QTextEdit ( QWidget * parent = 0, const char * name = 0 )
QString text () const
QString text ( int para ) const
TextFormat textFormat () const
QString context () const
QString documentTitle () const
void getSelection ( int * paraFrom, int * indexFrom, int * paraTo, int * indexTo, int selNum = 0 ) const
virtual bool find ( const QString & expr, bool cs, bool wo, bool forward = TRUE, int * para = 0, int * index = 0 )
int paragraphs () const
int lines () const
int linesOfParagraph ( int para ) const
int lineOfChar ( int para, int index )
int length () const
QRect paragraphRect ( int para ) const
int paragraphAt ( const QPoint & pos ) const
int charAt ( const QPoint & pos, int * para ) const
int paragraphLength ( int para ) const
QStyleSheet * styleSheet () const
QMimeSourceFactory * mimeSourceFactory () const
QBrush paper () const
bool linkUnderline () const
virtual int heightForWidth ( int w ) const
bool hasSelectedText () const
QString selectedText () const
bool isUndoAvailable () const
bool isRedoAvailable () const
WordWrap wordWrap () const
int wrapColumnOrWidth () const
WrapPolicy wrapPolicy () const
int tabStopWidth () const
QString anchorAt ( const QPoint & pos )
bool isReadOnly () const
void getCursorPosition ( int * para, int * index ) const
bool isModified () const
bool italic () const
bool bold () const
bool underline () const
QString family () const
int pointSize () const
QColor color () const
QFont font () const
int alignment () const
int undoDepth () const
virtual bool getFormat ( int para, int index, QFont * font, QColor * color, VerticalAlignment * verticalAlignment )
virtual bool getParagraphFormat ( int para, QFont * font, QColor * color, VerticalAlignment * verticalAlignment, int * alignment, QStyleSheetItem::DisplayMode * displayMode, QStyleSheetItem::ListStyle * listStyle, int * listDepth )
bool isOverwriteMode () const
QColor paragraphBackgroundColor ( int para ) const
bool isUndoRedoEnabled () const

  Public Slots
virtual void setMimeSourceFactory ( QMimeSourceFactory * factory )
virtual void setStyleSheet ( QStyleSheet * styleSheet )
virtual void scrollToAnchor ( const QString & name )
virtual void setPaper ( const QBrush & pap )
virtual void setLinkUnderline ( bool )
virtual void setWordWrap ( WordWrap mode )
virtual void setWrapColumnOrWidth ( int )
virtual void setWrapPolicy ( WrapPolicy policy )
virtual void copy ()
virtual void append ( const QString & text )
void setText ( const QString & txt )
virtual void setText ( const QString & text, const QString & context )
virtual void setTextFormat ( TextFormat f )
virtual void selectAll ( bool select = TRUE )
virtual void setTabStopWidth ( int ts )
virtual void zoomIn ( int range )
virtual void zoomIn ()
virtual void zoomOut ( int range )
virtual void zoomOut ()
virtual void zoomTo ( int size )
virtual void setReadOnly ( bool b )
virtual void undo ()
virtual void redo ()
virtual void cut ()
virtual void paste ()
virtual void pasteSubType ( const QCString & subtype )
virtual void clear ()
virtual void del ()
virtual void indent ()
virtual void setItalic ( bool b )
virtual void setBold ( bool b )
virtual void setUnderline ( bool b )
virtual void setFamily ( const QString & fontFamily )
virtual void setPointSize ( int s )
virtual void setColor ( const QColor & c )
virtual void setVerticalAlignment ( VerticalAlignment a )
virtual void setAlignment ( int a )
virtual void setParagType ( QStyleSheetItem::DisplayMode dm, QStyleSheetItem::ListStyle listStyle )
virtual void setCursorPosition ( int para, int index )
virtual void setSelection ( int paraFrom, int indexFrom, int paraTo, int indexTo, int selNum = 0 )
virtual void setSelectionAttributes ( int selNum, const QColor & back, bool invertText )
virtual void setModified ( bool m )
virtual void setUndoDepth ( int d )
virtual void ensureCursorVisible ()
virtual void placeCursor ( const QPoint & pos, QTextCursor * c = 0 )
virtual void moveCursor ( CursorAction action, bool select )
virtual void doKeyboardAction ( KeyboardAction action )
virtual void removeSelectedText ( int selNum = 0 )
virtual void removeSelection ( int selNum = 0 )
virtual void setCurrentFont ( const QFont & f )
virtual void setOverwriteMode ( bool b )
virtual void scrollToBottom ()
virtual void insert ( const QString & text, bool indent = FALSE, bool checkNewLine = TRUE, bool removeSelected = TRUE )
virtual void insertAt ( const QString & text, int para, int index )
virtual void removeParagraph ( int para )
virtual void insertParagraph ( const QString & text, int para )
virtual void setParagraphBackgroundColor ( int para, const QColor & bg )
virtual void clearParagraphBackground ( int para )
virtual void setUndoRedoEnabled ( bool b )

  Signals
void textChanged ()
void selectionChanged ()
void copyAvailable ( bool yes )
void undoAvailable ( bool yes )
void redoAvailable ( bool yes )
void currentFontChanged ( const QFont & f )
void currentColorChanged ( const QColor & c )
void currentAlignmentChanged ( int a )
void currentVerticalAlignmentChanged ( VerticalAlignment a )
void cursorPositionChanged ( QTextCursor * c )
void cursorPositionChanged ( int para, int pos )
void returnPressed ()
void modificationChanged ( bool m )

  Properties
QString documentTitle - the title of the document parsed from the text (read only)
bool hasSelectedText - whether some text is selected in selection 0 (read only)
int length - the number of characters in the text (read only)
bool linkUnderline - whether hypertext links will be underlined
bool modified - whether the document has been modified by the user
bool overwriteMode - the text edit's overwrite mode
QBrush paper - the background (paper) brush
bool readOnly - whether the text edit is read-only
QString selectedText - the selected text (from selection 0) or an empty string if there is no currently selected text (in selection 0) (read only)
int tabStopWidth - the tab stop width in pixels
QString text - the text edit's text
TextFormat textFormat - the text format: rich text, plain text or auto text
int undoDepth - the depth of the undo history
bool undoRedoEnabled - whether undo/redo is enabled
WordWrap wordWrap - the word wrap mode
int wrapColumnOrWidth - the position (in pixels or columns depending on the wrap mode) where text will be wrapped
WrapPolicy wrapPolicy - the word wrap policy, at whitespace or anywhere

  Protected Members
void repaintChanged ()
void updateStyles ()
virtual void keyPressEvent ( QKeyEvent * e )
virtual bool focusNextPrevChild ( bool n )
QTextCursor * textCursor () const
virtual QPopupMenu * createPopupMenu ( const QPoint & pos )
virtual QPopupMenu * createPopupMenu ()

DESCRIPTION
The QTextEdit widget provides a sophisticated single-page rich text editor.

QTextEdit is an advanced WYSIWYG editor supporting rich text formatting. It is optimized to handle large documents and to respond quickly to user input.

QTextEdit works on paragraphs and characters. A paragraph is a formatted string which is word-wrapped to fit into the width of the widget. A document consists of zero or more paragraphs, indexed from 0. Characters are indexed on a per-paragraph basis, also indexed from 0. The words in the paragraph are aligned in accordance with the paragraph's alignment(). Paragraphs are separated by hard line breaks. Each character within a paragraph has its own attributes, for example, font and color.

QTextEdit can display images (using QMimeSourceFactory), lists and tables. If the text is too large to view within the text edit's viewport, scrollbars will appear. The text edit can load both plain text and HTML files (a subset of HTML 3.2 and 4). The rendering style and the set of valid tags are defined by a styleSheet(). Change the style sheet with setStyleSheet(); see QStyleSheet for details. The images identified by image tags are displayed if they can be interpreted using the text edit's QMimeSourceFactory; see setMimeSourceFactory().

If you want a text browser with more navigation use QTextBrowser. If you just need to display a small piece of rich text use QLabel or QSimpleRichText.

If you create a new QTextEdit, and want to allow the user to edit rich text, call setTextFormat(Qt::RichText) to ensure that the text is treated as rich text. (Rich text uses HTML tags to set text formatting attributes. See QStyleSheet for information on the HTML tags that are supported.). If you don't call setTextFormat() explicitly the text edit will guess from the text itself whether it is rich text or plain text. This means that if the text looks like HTML or XML it will probably be interpreted as rich text, so you should call setTextFormat(Qt::PlainText) to preserve such text.

The text edit documentation uses the following concepts:

current format -- this is the format at the current cursor position, and it is the format of the selected text if any.

current paragraph -- the paragraph which contains the cursor.

The text is set or replaced using setText() which deletes any existing text and replaces it with the text passed in the setText() call. Text can be inserted with insert(), paste() and pasteSubType(). Text can also be cut(). The entire text is deleted with clear() and the selected text is deleted with removeSelectedText(). Selected (marked) text can also be deleted with del() (which will delete the character to the right of the cursor if no text is selected).

The current format's attributes are set with setItalic(), setBold(), setUnderline(), setFamily() (font family), setPointSize(), setColor() and setCurrentFont(). The current paragraph's style is set with setParagType() and its alignment is set with setAlignment().

Use setSelection() to select text. The setSelectionAttributes() function is used to indicate how selected text should be displayed. Use hasSelectedText() to find out if any text is selected. The currently selected text's position is available using getSelection() and the selected text itself is returned by selectedText(). The selection can be copied to the clipboard with copy(), or cut to the clipboard with cut(). It can be deleted with removeSelectedText(). The entire text can be selected (or unselected) using selectAll(). QTextEdit supports multiple selections. Most of the selection functions operate on the default selection, selection 0. If the user presses a non-selecting key, e.g. a cursor key without also holding down Shift, all selections are cleared.

Set and get the position of the cursor with setCursorPosition() and getCursorPosition() respectively. When the cursor is moved, the signals currentFontChanged(), currentColorChanged() and currentAlignmentChanged() are emitted to reflect the font, color and alignment at the new cursor position.

If the text changes, the textChanged() signal is emitted, and if the user inserts a new line by pressing Return or Enter, returnPressed() is emitted. The isModified() function will return TRUE if the text has been modified.

QTextEdit provides command-based undo and redo. To set the depth of the command history use setUndoDepth() which defaults to 100 steps. To undo or redo the last operation call undo() or redo(). The signals undoAvailable() and redoAvailable() indicate whether the undo and redo operations can be executed.

The indent() function is used to reindent a paragraph. It is useful for code editors, for example in Qt Designer's code editor Ctrl+I invokes the indent() function.

Loading and saving text is achieved using setText() and text(), for example:

    QFile file( fileName ); // Read the text from a file
    if ( file.open( IO_ReadOnly ) ) {
        QTextStream ts( &file );
        textEdit->setText( ts.read() );
    }

    QFile file( fileName ); // Write the text to a file
    if ( file.open( IO_WriteOnly ) ) {
        QTextStream ts( &file );
        ts << textEdit->text();
        textEdit->setModified( FALSE );
    }

By default the text edit wraps words at whitespace to fit within the text edit widget. The setWordWrap() function is used to specify the kind of word wrap you want, or NoWrap if you don't want any wrapping. Call setWordWrap() to set a fixed pixel width FixedPixelWidth, or character column (e.g. 80 column) FixedColumnWidth with the pixels or columns specified with setWrapColumnOrWidth(). If you use word wrap to the widget's width WidgetWidth, you can specify whether to break on whitespace or anywhere with setWrapPolicy().

The background color is set differently than other widgets, using setPaper(). You specify a brush style which could be a plain color or a complex pixmap.

Hypertext links are automatically underlined; this can be changed with setLinkUnderline(). The tab stop width is set with setTabStopWidth().

The zoomIn() and zoomOut() functions can be used to resize the text by increasing (decreasing for zoomOut()) the point size used. Images are not affected by the zoom functions.

The lines() function returns the number of lines in the text and paragraphs() returns the number of paragraphs. The number of lines within a particular paragraph is returned by linesOfParagraph(). The length of the entire text in characters is returned by length().

You can scroll to an anchor in the text, e.g. <a name="anchor"> with scrollToAnchor(). The find() function can be used to find and select a given string within the text.

The list of key-bindings which are implemented for editing: <center>.nf
</center>

To select (mark) text hold down the Shift key whilst pressing one of the movement keystrokes, for example, Shift+Right Arrow will select the character to the right, and Shift+Ctrl+Right Arrow will select the word to the right, etc.

By default the text edit widget operates in insert mode so all text that the user enters is inserted into the text edit and any text to the right of the cursor is moved out of the way. The mode can be changed to overwrite, where new text overwrites any text to the right of the cursor, using setOverwriteMode().

QTextEdit can also be used as read-only text viewer. Call setReadOnly( TRUE ) to disable editing. A read-only QTextEdit provides the same functionality as the (obsolete) QTextView. (QTextView is still supplied for compatibility with old code.)

When QTextEdit is used read-only the key-bindings are limited to navigation, and text may only be selected with the mouse: <center>.nf
</center>

The text edit may be able to provide some meta-information. For example, the documentTitle() function will return the text from within HTML <title> tags.

The text displayed in a text edit has a context. The context is a path which the text edit's QMimeSourceFactory uses to resolve the locations of files and images. It is passed to the mimeSourceFactory() when quering data. (See QTextEdit() and context().)

Note that we do not intend to add a full-featured web browser widget to Qt (because that would easily double Qt's size and only a few applications would benefit from it). The rich text support in Qt is designed to provide a fast, portable and efficient way to add reasonable online help facilities to applications, and to provide a basis for rich text editors.

See also Basic Widgets and Text Related Classes.

  Member Type Documentation

QTextEdit::CursorAction
This enum is used by moveCursor() to specify in which direction the cursor should be moved:

QTextEdit::MoveBackward - Moves the cursor one character backward

QTextEdit::MoveWordBackward - Moves the cursor one word backward

QTextEdit::MoveForward - Moves the cursor one character forward

QTextEdit::MoveWordForward - Moves the cursor one word forward

QTextEdit::MoveUp - Moves the cursor up one line

QTextEdit::MoveDown - Moves the cursor down one line

QTextEdit::MoveLineStart - Moves the cursor to the beginning of the line

QTextEdit::MoveLineEnd - Moves the cursor to the end of the line

QTextEdit::MoveHome - Moves the cursor to the beginning of the document

QTextEdit::MoveEnd - Moves the cursor to the end of the document

QTextEdit::MovePgUp - Moves the cursor one page up

QTextEdit::MovePgDown - Moves the cursor one page down

QTextEdit::KeyboardAction
This enum is used by doKeyboardAction() to specify which action should be executed:

QTextEdit::ActionBackspace - Delete the character to the left of the cursor.

QTextEdit::ActionDelete - Delete the character to the right of the cursor.

QTextEdit::ActionReturn - Split the paragraph at the cursor position.

QTextEdit::ActionKill - If the cursor is not at the end of the paragraph, delete the text from the cursor position until the end of the paragraph. If the cursor is at the end of the paragraph, delete the hard line break at the end of the paragraph - this will cause this paragraph to be joined with the following paragraph.

QTextEdit::VerticalAlignment
This enum is used to set the vertical alignment of the text.

QTextEdit::AlignNormal - Normal alignment

QTextEdit::AlignSuperScript - Superscript

QTextEdit::AlignSubScript - Subscript

QTextEdit::WordWrap
This enum defines the QTextEdit's word wrap modes. The following values are valid:

QTextEdit::NoWrap - Do not wrap the text.

QTextEdit::WidgetWidth - Wrap the text at the current width of the widget (this is the default). Wrapping is at whitespace by default; this can be changed with setWrapPolicy().

QTextEdit::FixedPixelWidth - Wrap the text at a fixed number of pixels from the widget's left side. The number of pixels is set with wrapColumnOrWidth().

QTextEdit::FixedColumnWidth - Wrap the text at a fixed number of character columns from the widget's left side. The number of characters is set with wrapColumnOrWidth(). This is useful if you need formatted text that can also be displayed gracefully on devices with monospaced fonts, for example a standard VT100 terminal, where you might set wrapColumnOrWidth() to 80.

See also wordWrap and wordWrap.

QTextEdit::WrapPolicy
This enum defines where text can be wrapped in word wrap mode.

The following values are valid:

QTextEdit::AtWhiteSpace - Break lines at whitespace, e.g. spaces or newlines.

QTextEdit::Anywhere - Break anywhere, including within words.

QTextEdit::AtWordBoundary - Don't use this deprecated value (it is a synonym for AtWhiteSpace which you should use instead).

See also wrapPolicy.

MEMBER FUNCTION DOCUMENTATION

QTextEdit::QTextEdit ( const QString & text, const QString & context = QString::null, QWidget * parent = 0, const char * name = 0 )
Constructs a QTextEdit with parent parent and name name. The text edit will display the text text using context context.

The context is a path which the text edit's QMimeSourceFactory uses to resolve the locations of files and images. It is passed to the mimeSourceFactory() when quering data.

For example if the text contains an image tag, <img src="image.png">, and the context is "path/to/look/in", the QMimeSourceFactory will try to load the image from" path/to/look/in/image.png". If the tag was <img src="/image.png">, the context will not be used (because QMimeSourceFactory recognizes that we have used an absolute path) and will try to load "/image.png". The context is applied in exactly the same way to hrefs, for example, <a href="target.html">Target</a>, would resolve to" path/to/look/in/target.html".

QTextEdit::QTextEdit ( QWidget * parent = 0, const char * name = 0 )
Constructs an empty QTextEdit with parent parent and name name.

int QTextEdit::alignment () const
Returns the alignment of the current paragraph.

See also setAlignment().

QString QTextEdit::anchorAt ( const QPoint & pos )
If there is an anchor at position pos (in contents coordinates), its name is returned, otherwise an empty string is returned.

void QTextEdit::append ( const QString & text ) [virtual slot]
Appends the text text to the end of the text edit. Note that the undo/redo history is cleared by this function.

Examples:

bool QTextEdit::bold () const
Returns TRUE if the current format is bold; otherwise returns FALSE.

See also setBold().

int QTextEdit::charAt ( const QPoint & pos, int * para ) const
Returns the index of the character (relative to its paragraph) at position pos (in contents coordinates). If para is not null, *para is set to this paragraph. If there is no character at pos, -1 is returned.

void QTextEdit::clear () [virtual slot]
Deletes all the text in the text edit.

See also cut(), removeSelectedText() and text.

void QTextEdit::clearParagraphBackground ( int para ) [virtual slot]
Clears the background color of the paragraph para, so that the default color is used again.

QColor QTextEdit::color () const
Returns the color of the current format.

See also setColor() and paper.

QString QTextEdit::context () const
Returns the context of the edit. The context is a path which the text edit's QMimeSourceFactory uses to resolve the locations of files and images.

See also text.

Examples:

void QTextEdit::copy () [virtual slot]
Copies any selected text (from selection 0) to the clipboard.

See also hasSelectedText and copyAvailable().

void QTextEdit::copyAvailable ( bool yes ) [signal]
This signal is emitted when text is selected or de-selected in the text edit.

When text is selected this signal will be emitted with yes set to TRUE. If no text has been selected or if the selected text is de-selected this signal is emitted with yes set to FALSE.

If yes is TRUE then copy() can be used to copy the selection to the clipboard. If yes is FALSE then copy() does nothing.

See also selectionChanged().

QPopupMenu * QTextEdit::createPopupMenu ( const QPoint & pos ) [virtual protected]
This function is called to create a right mouse button popup menu at the document position pos. If you want to create a custom popup menu, reimplement this function and return the created popup menu. Ownership of the popup menu is transferred to the caller.

QPopupMenu * QTextEdit::createPopupMenu () [virtual protected]
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

This function is called to create a right mouse button popup menu. If you want to create a custom popup menu, reimplement this function and return the created popup menu. Ownership of the popup menu is transferred to the caller.

void QTextEdit::currentAlignmentChanged ( int a ) [signal]
This signal is emitted if the alignment of the current paragraph has changed.

The new alignment is a.

See also setAlignment().

void QTextEdit::currentColorChanged ( const QColor & c ) [signal]
This signal is emitted if the color of the current format has changed.

The new color is c.

See also setColor().

void QTextEdit::currentFontChanged ( const QFont & f ) [signal]
This signal is emitted if the font of the current format has changed.

The new font is f.

See also setCurrentFont().

void QTextEdit::currentVerticalAlignmentChanged ( VerticalAlignment a ) [signal]
This signal is emitted if the vertical alignment of the current format has changed.

The new vertical alignment is a.

See also setVerticalAlignment().

void QTextEdit::cursorPositionChanged ( QTextCursor * c ) [signal]
This signal is emitted if the position of the cursor changed. c points to the text cursor object.

See also setCursorPosition().

void QTextEdit::cursorPositionChanged ( int para, int pos ) [signal]
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

This signal is emitted if the position of the cursor changed. para contains the paragraph index and pos contains the character position within the paragraph.

See also setCursorPosition().

void QTextEdit::cut () [virtual slot]
Copies the selected text (from selection 0) to the clipboard and deletes it from the text edit.

If there is no selected text (in selection 0) nothing happens.

See also QTextEdit::copy(), paste() and pasteSubType().

void QTextEdit::del () [virtual slot]
If there is some selected text (in selection 0) it is deleted. If there is no selected text (in selection 0) the character to the right of the text cursor is deleted.

See also removeSelectedText() and cut().

void QTextEdit::doKeyboardAction ( KeyboardAction action ) [virtual slot]
Executes keyboard action action. This is normally called by a key event handler.

QString QTextEdit::documentTitle () const
Returns the title of the document parsed from the text. See the "documentTitle" property for details.

void QTextEdit::ensureCursorVisible () [virtual slot]
Ensures that the cursor is visible by scrolling the text edit if necessary.

See also setCursorPosition().

QString QTextEdit::family () const
Returns the font family of the current format.

See also setFamily(), setCurrentFont() and setPointSize().

bool QTextEdit::find ( const QString & expr, bool cs, bool wo, bool forward = TRUE, int * para = 0, int * index = 0 ) [virtual]
Finds the next occurrence of the string, expr. Returns TRUE if expr is found; otherwise returns FALSE.

If para and index are both null the search begins from the start of the text. If para and index are both not null, the search begins from the *index character position in the *para paragraph.

If cs is TRUE the search is case sensitive, otherwise it is case insensitive. If wo is TRUE the search looks for whole word matches only; otherwise it searches for any matching text. If forward is TRUE (the default) the search works forward from the starting position to the end of the text, otherwise it works backwards to the beginning of the text.

If expr is found the function returns TRUE. If index and para are not null, the number of the paragraph in which the first character of the match was found is put into *para, and the index position of that character within the paragraph is put into *index.

If expr is not found the function returns FALSE. If index and para are not null and expr is not found, *index and *para are undefined.

bool QTextEdit::focusNextPrevChild ( bool n ) [virtual protected]
Reimplemented to allow tabbing through links. If n is TRUE the tab moves the focus to the next child; if n is FALSE the tab moves the focus to the previous child. Returns TRUE if the focus was moved; otherwise returns FALSE.

QFont QTextEdit::font () const
Returns the font of the current format.

See also setCurrentFont(), setFamily() and setPointSize().

Examples:

void QTextEdit::getCursorPosition ( int * para, int * index ) const
This function sets the *para and *index parameters to the current cursor position. para and index must be non-null int pointers.

See also setCursorPosition().

bool QTextEdit::getFormat ( int para, int index, QFont * font, QColor * color, VerticalAlignment * verticalAlignment ) [virtual]
This function gets the format of the character at position index in paragraph para. Sets font to the character's font, color to the character's color and verticalAlignment to the character's vertical alignment.

Returns FALSE if para or index is out of range otherwise returns TRUE.

bool QTextEdit::getParagraphFormat ( int para, QFont * font, QColor * color, VerticalAlignment * verticalAlignment, int * alignment, QStyleSheetItem::DisplayMode * displayMode, QStyleSheetItem::ListStyle * listStyle, int * listDepth ) [virtual]
This function gets the format of the paragraph para. Sets font to the paragraphs's font, color to the paragraph's color, verticalAlignment to the paragraph's vertical alignment, alignment to the paragraph's alignment, displayMode to the paragraph's display mode, listStyle to the paragraph's list style (if the display mode is QStyleSheetItem::DisplayListItem) and listDepth to the depth of the list (if the display mode is QStyleSheetItem::DisplayListItem).

Returns FALSE if para is out of range otherwise returns TRUE.

void QTextEdit::getSelection ( int * paraFrom, int * indexFrom, int * paraTo, int * indexTo, int selNum = 0 ) const
If there is a selection, *paraFrom is set to the number of the paragraph in which the selection begins and *paraTo is set to the number of the paragraph in which the selection ends. (They could be the same.) *indexFrom is set to the index at which the selection begins within *paraFrom, and *indexTo is set to the index at which the selection ends within *paraTo.

If there is no selection, *paraFrom, *indexFrom, *paraTo and *indexTo are all set to -1.

paraFrom, indexFrom, paraTo and indexTo must be non-null int pointers.

The selNum is the number of the selection (multiple selections are supported). It defaults to 0 (the default selection).

See also setSelection() and selectedText.

bool QTextEdit::hasSelectedText () const
Returns TRUE if some text is selected in selection 0; otherwise returns FALSE. See the "hasSelectedText" property for details.

int QTextEdit::heightForWidth ( int w ) const [virtual]
Returns how many pixels high the text edit needs to be to display all the text if the text edit is w pixels wide.

Reimplemented from QWidget.

void QTextEdit::indent () [virtual slot]
Re-indents the current paragraph.

void QTextEdit::insert ( const QString & text, bool indent = FALSE, bool checkNewLine = TRUE, bool removeSelected = TRUE ) [virtual slot]
Inserts text at the current cursor position. If indent is TRUE, the paragraph is re-indented. If checkNewLine is TRUE, newline characters in text result in hard line breaks (i.e. new paragraphs). If checkNewLine is FALSE the behaviour of the editor is undefined if the text contains newlines. If removeSelected is TRUE, any selected text (in selection 0) is removed before the text is inserted.

See also paste() and pasteSubType().

void QTextEdit::insertAt ( const QString & text, int para, int index ) [virtual slot]
Inserts text in the paragraph para and position index

void QTextEdit::insertParagraph ( const QString & text, int para ) [virtual slot]
Inserts text as the paragraph at position para. If para is -1, the text is appended.

bool QTextEdit::isModified () const
Returns TRUE if the document has been modified by the user; otherwise returns FALSE. See the "modified" property for details.

bool QTextEdit::isOverwriteMode () const
Returns the text edit's overwrite mode. See the "overwriteMode" property for details.

bool QTextEdit::isReadOnly () const
Returns TRUE if the text edit is read-only; otherwise returns FALSE. See the "readOnly" property for details.

bool QTextEdit::isRedoAvailable () const
Returns whether redo is available

bool QTextEdit::isUndoAvailable () const
Returns whether undo is available

bool QTextEdit::isUndoRedoEnabled () const
Returns TRUE if undo/redo is enabled; otherwise returns FALSE. See the "undoRedoEnabled" property for details.

bool QTextEdit::italic () const
Returns TRUE if the current format is italic; otherwise returns FALSE.

See also setItalic().

void QTextEdit::keyPressEvent ( QKeyEvent * e ) [virtual protected]
Processes the key event, e. By default key events are used to provide keyboard navigation and text editing.

Reimplemented from QWidget.

Reimplemented in QTextBrowser.

int QTextEdit::length () const
Returns the number of characters in the text. See the "length" property for details.

int QTextEdit::lineOfChar ( int para, int index )
Returns the line number of the line in paragraph para in which the character at position index appears. The index position is relative to the beginning of the paragraph. If there is no such paragraph or no such character at the index position (e.g. the index is out of range) -1 is returned.

int QTextEdit::lines () const
Returns the number of lines in the text edit; this could be 0.

Warning: This function may be slow. Lines change all the time during word wrapping, so this function has to iterate over all the paragraphs and get the number of lines from each one individually.

Examples:

int QTextEdit::linesOfParagraph ( int para ) const
Returns the number of lines in paragraph para, or -1 if there is no paragraph with index para.

bool QTextEdit::linkUnderline () const
Returns TRUE if hypertext links will be underlined; otherwise returns FALSE. See the "linkUnderline" property for details.

QMimeSourceFactory * QTextEdit::mimeSourceFactory () const
Returns the QMimeSourceFactory which is currently used by this text edit.

See also setMimeSourceFactory().

Examples:

void QTextEdit::modificationChanged ( bool m ) [signal]
This signal is emitted when the modification of the document changed. If m is TRUE, the document was modified, otherwise the modification state has been reset to unmodified.

See also modified.

void QTextEdit::moveCursor ( CursorAction action, bool select ) [virtual slot]
Moves the text cursor according to action. This is normally used by some key event handler. select specifies whether the text between the current cursor position and the new position should be selected.

QBrush QTextEdit::paper () const
Returns the background (paper) brush. See the "paper" property for details.

int QTextEdit::paragraphAt ( const QPoint & pos ) const
Returns the paragraph which is at position pos (in contents coordinates), or -1 if there is no paragraph with index pos.

QColor QTextEdit::paragraphBackgroundColor ( int para ) const
Returns the background color of the paragraph para or an invalid color if para is out of range or the paragraph has no background set

int QTextEdit::paragraphLength ( int para ) const
Returns the length of the paragraph para (number of characters), or -1 if there is no paragraph with index para

QRect QTextEdit::paragraphRect ( int para ) const
Returns the rectangle of the paragraph para in contents coordinates, or an invalid rectangle if para is out of range.

int QTextEdit::paragraphs () const
Returns the number of paragraphs in the text; this could be 0.

void QTextEdit::paste () [virtual slot]
Pastes the text from the clipboard into the text edit at the current cursor position. Only plain text is pasted.

If there is no text in the clipboard nothing happens.

See also pasteSubType(), cut() and QTextEdit::copy().

void QTextEdit::pasteSubType ( const QCString & subtype ) [virtual slot]
Pastes the text with format subtype from the clipboard into the text edit at the current cursor position. The subtype can be" plain" or "html".

If there is no text with format subtype in the clipboard nothing happens.

See also paste(), cut() and QTextEdit::copy().

void QTextEdit::placeCursor ( const QPoint & pos, QTextCursor * c = 0 ) [virtual slot]
Places the cursor c at the character which is closest to position pos (in contents coordinates). If c is 0, the default text cursor is used.

See also setCursorPosition().

int QTextEdit::pointSize () const
Returns the point size of the font of the current format.

See also setFamily(), setCurrentFont() and setPointSize().

void QTextEdit::redo () [virtual slot]
Redoes the last operation.

If there is no operation to redo, e.g. there is no redo step in the undo/redo history, nothing happens.

See also redoAvailable(), undo() and undoDepth.

void QTextEdit::redoAvailable ( bool yes ) [signal]
This signal is emitted when the availability of redo changes. If yes is TRUE, then redo() will work until redoAvailable( FALSE ) is next emitted.

See also redo() and undoDepth.

void QTextEdit::removeParagraph ( int para ) [virtual slot]
Removes the paragraph para

void QTextEdit::removeSelectedText ( int selNum = 0 ) [virtual slot]
Deletes the selected text (i.e. the default selection's text) of the selection selNum (by default, 0). If there is no selected text nothing happens.

See also selectedText and removeSelection().

void QTextEdit::removeSelection ( int selNum = 0 ) [virtual slot]
Removes the selection selNum (by default 0). This does not remove the selected text.

See also removeSelectedText().

void QTextEdit::repaintChanged () [protected]
Repaints any paragraphs that have changed.

Although used extensively internally you shouldn't need to call this yourself.

void QTextEdit::returnPressed () [signal]
This signal is emitted if the user pressed the Return or the Enter key.

void QTextEdit::scrollToAnchor ( const QString & name ) [virtual slot]
Scrolls the text edit to make the text at the anchor called name visible, if it can be found in the document. If the anchor isn't found no scrolling will occur. An anchor is defined using the HTML anchor tag, e.g. <a name="target">.

void QTextEdit::scrollToBottom () [virtual slot]
Scrolls to the bottom of the document and does formatting if required

void QTextEdit::selectAll ( bool select = TRUE ) [virtual slot]
If select is TRUE (the default), all the text is selected as selection 0. If select is FALSE any selected text is unselected, i.e., the default selection (selection 0) is cleared.

See also selectedText.

QString QTextEdit::selectedText () const
Returns the selected text (from selection 0) or an empty string if there is no currently selected text (in selection 0). See the "selectedText" property for details.

void QTextEdit::selectionChanged () [signal]
This signal is emitted whenever the selection changes.

See also setSelection() and copyAvailable().

void QTextEdit::setAlignment ( int a ) [virtual slot]
Sets the alignment of the current paragraph to a. Valid alignments are Qt::AlignLeft, Qt::AlignRight, Qt::AlignJustify and Qt::AlignCenter (which centers horizontally).

See also setParagType().

Reimplemented in QMultiLineEdit.

void QTextEdit::setBold ( bool b ) [virtual slot]
If b is TRUE sets the current format to bold; otherwise sets the current format to non-bold.

See also bold().

void QTextEdit::setColor ( const QColor & c ) [virtual slot]
Sets the color of the current format, i.e. of the text, to c.

See also color() and paper.

Example: action/actiongroup/editor.cpp.

void QTextEdit::setCurrentFont ( const QFont & f ) [virtual slot]
Sets the font of the current format to f.

See also font(), setPointSize() and setFamily().

void QTextEdit::setCursorPosition ( int para, int index ) [virtual slot]
Sets the cursor to position index in paragraph para.

See also getCursorPosition().

void QTextEdit::setFamily ( const QString & fontFamily ) [virtual slot]
Sets the font family of the current format to fontFamily.

See also family() and setCurrentFont().

void QTextEdit::setItalic ( bool b ) [virtual slot]
If b is TRUE sets the current format to italic; otherwise sets the current format to non-italic.

See also italic().

void QTextEdit::setLinkUnderline ( bool ) [virtual slot]
Sets whether hypertext links will be underlined. See the "linkUnderline" property for details.

void QTextEdit::setMimeSourceFactory ( QMimeSourceFactory * factory ) [virtual slot]
Sets the text edit's mimesource factory to factory. See QMimeSourceFactory for further details.

See also mimeSourceFactory().

void QTextEdit::setModified ( bool m ) [virtual slot]
Sets whether the document has been modified by the user to m. See the "modified" property for details.

void QTextEdit::setOverwriteMode ( bool b ) [virtual slot]
Sets the text edit's overwrite mode to b. See the "overwriteMode" property for details.

void QTextEdit::setPaper ( const QBrush & pap ) [virtual slot]
Sets the background (paper) brush to pap. See the "paper" property for details.

void QTextEdit::setParagType ( QStyleSheetItem::DisplayMode dm, QStyleSheetItem::ListStyle listStyle ) [virtual slot]
Sets the paragraph style of the current paragraph to dm. If dm is QStyleSheetItem::DisplayListItem, the type of the list item is set to listStyle.

See also setAlignment().

void QTextEdit::setParagraphBackgroundColor ( int para, const QColor & bg ) [virtual slot]
Sets the background color of the paragraph para to bg

void QTextEdit::setPointSize ( int s ) [virtual slot]
Sets the point size of the current format to s.

Note that if s is zero or negative, the behaviour of this function is not defined.

See also pointSize(), setCurrentFont() and setFamily().

void QTextEdit::setReadOnly ( bool b ) [virtual slot]
Sets whether the text edit is read-only to b. See the "readOnly" property for details.

void QTextEdit::setSelection ( int paraFrom, int indexFrom, int paraTo, int indexTo, int selNum = 0 ) [virtual slot]
Sets a selection which starts at position indexFrom in paragraph paraFrom and ends at position indexTo in paragraph paraTo. Existing selections which have a different id (selNum) are not removed, existing selections which have the same id as selNum are removed.

Uses the selection settings of selection selNum. If selNum is 0, this is the default selection.

The cursor is moved to the end of the selection if selNum is 0, otherwise the cursor position remains unchanged.

See also getSelection() and selectedText.

void QTextEdit::setSelectionAttributes ( int selNum, const QColor & back, bool invertText ) [virtual slot]
Sets the background color of selection number selNum to back and specifies whether the text of this selection should be inverted with invertText.

This only works for selNum > 0. The default selection (selNum == 0) gets its attributes from the colorGroup() of this widget.

void QTextEdit::setStyleSheet ( QStyleSheet * styleSheet ) [virtual slot]
Sets the stylesheet to use with this text edit to styleSheet. Changes will only take effect for new text added with setText() or append().

See also styleSheet().

void QTextEdit::setTabStopWidth ( int ts ) [virtual slot]
Sets the tab stop width in pixels to ts. See the "tabStopWidth" property for details.

void QTextEdit::setText ( const QString & txt ) [slot]
Sets the text edit's text to txt. See the "text" property for details.

void QTextEdit::setText ( const QString & text, const QString & context ) [virtual slot]
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Changes the text of the text edit to the string text and the context to context. Any previous text is removed.

text may be interpreted either as plain text or as rich text, depending on the textFormat(). The default setting is AutoText, i.e. the text edit autodetects the format from text.

The optional context is a path which the text edit's QMimeSourceFactory uses to resolve the locations of files and images. (See QTextEdit::QTextEdit().) It is passed to the text edit's QMimeSourceFactory when quering data.

Note that the undo/redo history is cleared by this function.

See also text and textFormat.

void QTextEdit::setTextFormat ( TextFormat f ) [virtual slot]
Sets the text format: rich text, plain text or auto text to f. See the "textFormat" property for details.

void QTextEdit::setUnderline ( bool b ) [virtual slot]
If b is TRUE sets the current format to underline; otherwise sets the current format to non-underline.

See also underline().

void QTextEdit::setUndoDepth ( int d ) [virtual slot]
Sets the depth of the undo history to d. See the "undoDepth" property for details.

void QTextEdit::setUndoRedoEnabled ( bool b ) [virtual slot]
Sets whether undo/redo is enabled to b. See the "undoRedoEnabled" property for details.

void QTextEdit::setVerticalAlignment ( VerticalAlignment a ) [virtual slot]
Sets the vertical alignment of the current format, i.e. of the text, to a.

See also color() and paper.

void QTextEdit::setWordWrap ( WordWrap mode ) [virtual slot]
Sets the word wrap mode to mode. See the "wordWrap" property for details.

void QTextEdit::setWrapColumnOrWidth ( int ) [virtual slot]
Sets the position (in pixels or columns depending on the wrap mode) where text will be wrapped. See the "wrapColumnOrWidth" property for details.

void QTextEdit::setWrapPolicy ( WrapPolicy policy ) [virtual slot]
Sets the word wrap policy, at whitespace or anywhere to policy. See the "wrapPolicy" property for details.

QStyleSheet * QTextEdit::styleSheet () const
Returns the QStyleSheet which is currently used in this text edit.

See also setStyleSheet().

Example: helpviewer/helpwindow.cpp.

int QTextEdit::tabStopWidth () const
Returns the tab stop width in pixels. See the "tabStopWidth" property for details.

QString QTextEdit::text () const
Returns the text edit's text. See the "text" property for details.

QString QTextEdit::text ( int para ) const
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Returns the text of paragraph para.

If textFormat() is RichText the text will contain HTML formatting tags.

void QTextEdit::textChanged () [signal]
This signal is emitted whenever the text in the text edit changes.

See also text and append().

Examples:

QTextCursor * QTextEdit::textCursor () const [protected]
Returns the text edit's text cursor.

Warning: QTextCursor is not in the public API, but in special circumstances you might wish to use it.

TextFormat QTextEdit::textFormat () const
Returns the text format: rich text, plain text or auto text. See the "textFormat" property for details.

bool QTextEdit::underline () const
Returns TRUE if the current format is underlined; otherwise returns FALSE.

See also setUnderline().

void QTextEdit::undo () [virtual slot]
Undoes the last operation.

If there is no operation to undo, e.g. there is no undo step in the undo/redo history, nothing happens.

See also undoAvailable(), redo() and undoDepth.

void QTextEdit::undoAvailable ( bool yes ) [signal]
This signal is emitted when the availability of undo changes. If yes is TRUE, then undo() will work until undoAvailable( FALSE ) is next emitted.

See also undo() and undoDepth.

int QTextEdit::undoDepth () const
Returns the depth of the undo history. See the "undoDepth" property for details.

void QTextEdit::updateStyles () [protected]
Updates all the rendering styles used to display the text. You will probably want to call this function after calling setStyleSheet().

WordWrap QTextEdit::wordWrap () const
Returns the word wrap mode. See the "wordWrap" property for details.

int QTextEdit::wrapColumnOrWidth () const
Returns the position (in pixels or columns depending on the wrap mode) where text will be wrapped. See the "wrapColumnOrWidth" property for details.

WrapPolicy QTextEdit::wrapPolicy () const
Returns the word wrap policy, at whitespace or anywhere. See the "wrapPolicy" property for details.

void QTextEdit::zoomIn ( int range ) [virtual slot]
Zooms in on the text by by making the base font size range points larger and recalculating all font sizes. This does not change the size of any images.

See also zoomOut().

void QTextEdit::zoomIn () [virtual slot]
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Zooms in on the text by by making the base font size one point larger and recalculating all font sizes. This does not change the size of any images.

See also zoomOut().

void QTextEdit::zoomOut ( int range ) [virtual slot]
Zooms out on the text by making the base font size range points smaller and recalculating all font sizes. This does not change the size of any images.

See also zoomIn().

void QTextEdit::zoomOut () [virtual slot]
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Zooms out on the text by by making the base font size one point smaller and recalculating all font sizes. This does not change the size of any images.

See also zoomIn().

void QTextEdit::zoomTo ( int size ) [virtual slot]
Zooms the text by making the base font size size points and recalculating all font sizes. This does not change the size of any images.

  Property Documentation

QString documentTitle
This property holds the title of the document parsed from the text.

For PlainText the title will be an empty string. For RichText the title will be the text between the <title> tags, if present, otherwise an empty string.

Get this property's value with documentTitle().

bool hasSelectedText
This property holds whether some text is selected in selection 0.

Get this property's value with hasSelectedText().

int length
This property holds the number of characters in the text.

Get this property's value with length().

bool linkUnderline
This property holds whether hypertext links will be underlined.

If TRUE (the default) hypertext links will be displayed underlined. If FALSE links will not be displayed underlined.

Set this property's value with setLinkUnderline() and get this property's value with linkUnderline().

bool modified
This property holds whether the document has been modified by the user.

Set this property's value with setModified() and get this property's value with isModified().

bool overwriteMode
This property holds the text edit's overwrite mode.

If FALSE (the default) characters entered by the user are inserted with any characters to the right being moved out of the way. If TRUE, the editor is in overwrite mode, i.e. characters entered by the user overwrite any characters to the right of the cursor position.

Set this property's value with setOverwriteMode() and get this property's value with isOverwriteMode().

QBrush paper
This property holds the background (paper) brush.

The brush that is currently used to draw the background of the text edit. The initial setting is an empty brush.

Set this property's value with setPaper() and get this property's value with paper().

bool readOnly
This property holds whether the text edit is read-only.

In a read-only text edit the user can only navigate through the text and select text; modifying the text is not possible.

This property's default is FALSE.

Set this property's value with setReadOnly() and get this property's value with isReadOnly().

QString selectedText
This property holds the selected text (from selection 0) or an empty string if there is no currently selected text (in selection 0).

The text is always returned as PlainText regardless of the text format. In a future version of Qt an HTML subset may be returned depending on the text format.

See also hasSelectedText.

Get this property's value with selectedText().

int tabStopWidth
This property holds the tab stop width in pixels.

Set this property's value with setTabStopWidth() and get this property's value with tabStopWidth().

QString text
This property holds the text edit's text.

There is no default text.

On setting, any previous text is deleted.

The text may be interpreted either as plain text or as rich text, depending on the textFormat(). The default setting is AutoText, i.e. the text edit autodetects the format of the text.

For richtext, calling text() on an editable QTextEdit will cause the text to be regenerated from the textedit. This may mean that the QString returned may not be exactly the same as the one that was set.

See also textFormat.

Set this property's value with setText() and get this property's value with text().

TextFormat textFormat
This property holds the text format: rich text, plain text or auto text.

The text format is one of the following:

PlainText - all characters, except newlines, are displayed verbatim, including spaces. Whenever a newline appears in the text the text edit inserts a hard line break and begins a new paragraph.

RichText - rich text rendering. The available styles are defined in the default stylesheet QStyleSheet::defaultSheet().

AutoText - this is the default. The text edit autodetects which rendering style is best, PlainText or RichText. This is done by using the QStyleSheet::mightBeRichText() function.

Set this property's value with setTextFormat() and get this property's value with textFormat().

int undoDepth
This property holds the depth of the undo history.

The maximum number of steps in the undo/redo history. The default is 100.

See also undo() and redo().

Set this property's value with setUndoDepth() and get this property's value with undoDepth().

bool undoRedoEnabled
This property holds whether undo/redo is enabled.

The default is TRUE.

Set this property's value with setUndoRedoEnabled() and get this property's value with isUndoRedoEnabled().

WordWrap wordWrap
This property holds the word wrap mode.

The default mode is WidgetWidth which causes words to be wrapped at the right edge of the text edit. Wrapping occurs at whitespace, keeping whole words intact. If you want wrapping to occur within words use setWrapPolicy(). If you set a wrap mode of FixedPixelWidth or FixedColumnWidth you should also call setWrapColumnOrWidth() with the width you want.

See also WordWrap, wrapColumnOrWidth and wrapPolicy.

Set this property's value with setWordWrap() and get this property's value with wordWrap().

int wrapColumnOrWidth
This property holds the position (in pixels or columns depending on the wrap mode) where text will be wrapped.

If the wrap mode is FixedPixelWidth, the value is the number of pixels from the left edge of the text edit at which text should be wrapped. If the wrap mode is FixedColumnWidth, the value is the column number (in character columns) from the left edge of the text edit at which text should be wrapped.

See also wordWrap.

Set this property's value with setWrapColumnOrWidth() and get this property's value with wrapColumnOrWidth().

WrapPolicy wrapPolicy
This property holds the word wrap policy, at whitespace or anywhere.

Defines where text can be wrapped when word wrap mode is not NoWrap. The choices are AtWhiteSpace (the default) and Anywhere.

See also wordWrap.

Set this property's value with setWrapPolicy() and get this property's value with wrapPolicy().

SEE ALSO
http://doc.trolltech.com/qtextedit.html http://www.trolltech.com/faq/tech.html

COPYRIGHT
Copyright 1992-2001 Trolltech AS, http://www.trolltech.com. See the license file included in the distribution for a complete license statement.

AUTHOR
Generated automatically from the source code.

BUGS
If you find a bug in Qt, please report it as described in http://doc.trolltech.com/bughowto.html. Good bug reports help us to help you. Thank you.

The definitive Qt documentation is provided in HTML format; it is located at $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech.

If you find errors in this manual page, please report them to qt-bugs@trolltech.com. Please include the name of the manual page (qtextedit.3qt) and the Qt version (3.0.4).