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# QTextBlockFormat Class Reference
[QtGui module]

The QTextBlockFormat class provides formatting information for blocks of text in a QTextDocument. More...

     #include <QTextBlockFormat>

Inherits QTextFormat.

Note: All the functions in this class are reentrant.

- List of all members, including inherited members

### Public Functions

- QTextBlockFormat ()
- Qt::Alignment alignment () const
- qreal bottomMargin () const
- int indent () const
- bool isValid () const
- qreal leftMargin () const
- bool nonBreakableLines () const
- PageBreakFlags pageBreakPolicy () const
- qreal rightMargin () const
- void setAlignment ( Qt::Alignment alignment )
- void setBottomMargin ( qreal margin )
- void setIndent ( int indentation )
- void setLeftMargin ( qreal margin )
- void setNonBreakableLines ( bool b )
- void setPageBreakPolicy ( PageBreakFlags policy )
- void setRightMargin ( qreal margin )
- void setTabPositions ( const QList<QTextOption::Tab> & tabs )
- void setTextIndent ( qreal indent )
- void setTopMargin ( qreal margin )
- QList<QTextOption::Tab> tabPositions () const
- qreal textIndent () const
- qreal topMargin () const

- 49 public functions inherited from QTextFormat

## Detailed Description

The QTextBlockFormat class provides formatting information for blocks of text in a QTextDocument.

A document is composed of a list of blocks, represented by QTextBlock objects. Each block can contain an item of some kind, such as a paragraph of text, a table, a list, or an image. Every block has an associated QTextBlockFormat that specifies its characteristics.

To cater for left-to-right and right-to-left languages you can set a block's direction with setDirection(). Paragraph alignment is set with setAlignment(). Margins are controlled by setTopMargin(), setBottomMargin(), setLeftMargin(), setRightMargin(). Overall indentation is set with setIndent(), the indentation of the first line with setTextIndent().

Line breaking can be enabled and disabled with setNonBreakableLines().

The brush used to paint the paragraph's background is set with setBackground(), and other aspects of the text's appearance can be customized by using the setProperty() function with the `OutlinePen`, `ForegroundBrush`, and `BackgroundBrush` QTextFormat::Property values.

If a text block is part of a list, it can also have a list format that is accessible with the listFormat() function.

See also QTextBlock and QTextCharFormat.

## Member Function Documentation

### QTextBlockFormat::QTextBlockFormat ()

Constructs a new QTextBlockFormat.

### Qt::Alignment QTextBlockFormat::alignment () const

Returns the paragraph's alignment.

See also setAlignment().

### qreal QTextBlockFormat::bottomMargin () const

Returns the paragraph's bottom margin.

See also setBottomMargin() and topMargin().

### int QTextBlockFormat::indent () const

Returns the paragraph's indent.

See also setIndent().

### bool QTextBlockFormat::isValid () const

Returns true if this block format is valid; otherwise returns false.

### qreal QTextBlockFormat::leftMargin () const

Returns the paragraph's left margin.

See also setLeftMargin(), rightMargin(), and indent().

### bool QTextBlockFormat::nonBreakableLines () const

Returns true if the lines in the paragraph are non-breakable; otherwise returns false.

See also setNonBreakableLines().

### PageBreakFlags QTextBlockFormat::pageBreakPolicy () const

Returns the currently set page break policy for the paragraph. The default is QTextFormat::PageBreak_Auto.

This function was introduced in Qt 4.2.

See also setPageBreakPolicy().

### qreal QTextBlockFormat::rightMargin () const

Returns the paragraph's right margin.

See also setRightMargin() and leftMargin().

### void QTextBlockFormat::setAlignment ( Qt::Alignment alignment )

Sets the paragraph's alignment.

See also alignment().

### void QTextBlockFormat::setBottomMargin ( qreal margin )

Sets the paragraph's bottom margin.

See also bottomMargin(), setTopMargin(), setLeftMargin(), and setRightMargin().

### void QTextBlockFormat::setIndent ( int indentation )

Sets the paragraph's indentation. Margins are set independently of indentation with setLeftMargin() and setTextIdent().

See also indent().

### void QTextBlockFormat::setLeftMargin ( qreal margin )

Sets the paragraph's left margin. Indentation can be applied separately with setIndent().

See also leftMargin(), setRightMargin(), setTopMargin(), and setBottomMargin().

### void QTextBlockFormat::setNonBreakableLines ( bool b )

If b is true, the lines in the paragraph are treated as non-breakable; otherwise they are breakable.

See also nonBreakableLines().

### void QTextBlockFormat::setPageBreakPolicy ( PageBreakFlags policy )

Sets the page break policy for the paragraph to policy.

This function was introduced in Qt 4.2.

See also pageBreakPolicy().

### void QTextBlockFormat::setRightMargin ( qreal margin )

Sets the paragraph's right margin.

See also rightMargin(), setLeftMargin(), setTopMargin(), and setBottomMargin().

### void QTextBlockFormat::setTabPositions ( const QList<QTextOption::Tab> & tabs )

Sets the tab positions for the text block to those specified by tabs.

This function was introduced in Qt 4.4.

See also tabPositions().

### void QTextBlockFormat::setTextIndent ( qreal indent )

Sets the indent for the first line in the block. This allows the first line of a paragraph to be indented differently to the other lines, enhancing the readability of the text.

See also textIndent(), setLeftMargin(), setRightMargin(), setTopMargin(), and setBottomMargin().

### void QTextBlockFormat::setTopMargin ( qreal margin )

Sets the paragraph's top margin.

See also topMargin(), setBottomMargin(), setLeftMargin(), and setRightMargin().

### QList<QTextOption::Tab> QTextBlockFormat::tabPositions () const

Returns a list of tab positions defined for the text block.

This function was introduced in Qt 4.4.

See also setTabPositions().

### qreal QTextBlockFormat::textIndent () const

Returns the paragraph's text indent.

See also setTextIndent().

### qreal QTextBlockFormat::topMargin () const

Returns the paragraph's top margin.

See also setTopMargin() and bottomMargin().