QTextBlock Class Reference

Copies the other text block's attributes to this text block.

Returns a text block iterator pointing to the beginning of the text block.

See also end().

Returns the QTextBlockFormat that describes block-specific properties.

See also charFormat().

Returns an index into the document's internal list of block formats for the text block's format.

See also QTextDocument::allFormats().

Returns the number of this block, or -1 if the block is invalid.

See also QTextCursor::blockNumber().

Returns the QTextCharFormat that describes the block's character format. The block's character format is used when inserting text into an empty block.

See also blockFormat().

Returns an index into the document's internal list of character formats for the text block's character format.

See also QTextDocument::allFormats().

Clears the QTextLayout that is used to lay out and display the block's contents.

See also layout().

Returns true if the given position is located within the text block; otherwise returns false.

Returns the text document this text block belongs to, or 0 if the text block does not belong to any document.

Returns a text block iterator pointing to the end of the text block.

See also begin(), next(), and previous().

Returns the first line number of this block, or -1 if the block is invalid. Unless the layout supports it, the line number is identical to the block number.

See also QTextBlock::blockNumber().

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

Returns true if the block is visible; otherwise returns false.

See also setVisible().

Returns the QTextLayout that is used to lay out and display the block's contents.

Note that the returned QTextLayout object can only be modified from the documentChanged implementation of a QAbstractTextDocumentLayout subclass. Any changes applied from the outside cause undefined behavior.

See also clearLayout().

Returns the length of the block in characters.

Note: The length returned includes all formatting characters, for example, newline.

See also text(), charFormat(), and blockFormat().

Returns the line count. Not all document layouts support this feature.

See also setLineCount().

Returns the text block in the document after this block, or an empty text block if this is the last one.

Note that the next block may be in a different frame or table to this block.

See also previous(), begin(), and end().

Returns the index of the block's first character within the document.

Returns the text block in the document before this block, or an empty text block if this is the first one.

Note that the next block may be in a different frame or table to this block.

See also next(), begin(), and end().

Returns the blocks revision.

See also setRevision() and QTextDocument::revision().

Sets the line count to count.

See also lineCount().

Sets a blocks revision to rev.

See also revision() and QTextDocument::revision().

Attaches the given data object to the text block.

QTextBlockUserData can be used to store custom settings. The ownership is passed to the underlying text document, i.e. the provided QTextBlockUserData object will be deleted if the corresponding text block gets deleted. The user data object is not stored in the undo history, so it will not be available after undoing the deletion of a text block.

For example, if you write a programming editor in an IDE, you may want to let your user set breakpoints visually in your code for an integrated debugger. In a programming editor a line of text usually corresponds to one QTextBlock. The QTextBlockUserData interface allows the developer to store data for each QTextBlock, like for example in which lines of the source code the user has a breakpoint set. Of course this could also be stored externally, but by storing it inside the QTextDocument, it will for example be automatically deleted when the user deletes the associated line. It's really just a way to store custom information in the QTextDocument without using custom properties in QTextFormat which would affect the undo/redo stack.

See also userData().

Stores the specified state integer value in the text block. This may be useful for example in a syntax highlighter to store a text parsing state.

See also userState().

Sets the block's visibility to visible.

See also isVisible().

Returns the block's contents as plain text.

See also length(), charFormat(), and blockFormat().

Returns the resolved text direction.

If the block has no explicit direction set, it will resolve the direction from the blocks content. Returns either Qt::LeftToRight or Qt::RightToLeft.

See also QTextFormat::layoutDirection(), QString::isRightToLeft(), and Qt::LayoutDirection.

If the block represents a list item, returns the list that the item belongs to; otherwise returns 0.

Returns a pointer to a QTextBlockUserData object if previously set with setUserData() or a null pointer.

See also setUserData().

Returns the integer value previously set with setUserState() or -1.

See also setUserState().

Returns true if this text block is different from the other text block.

Returns true if this text block occurs before the other text block in the document.

Assigns the other text block to this text block.

Returns true if this text block is the same as the other text block.