On Wed, Sep 11, 2013 at 9:43 PM, Vojtěch Král <vojt...@kral.hk> wrote:
> Hi, > I don't understand how to edit text blocks in QTextDocument using > QTextCursor. > So far I've been inserting text using QTextCursor::insertText() and it > worked fine, > however, I later noticed that each call to QTextCursor::insertText() > creates a new QTextBlock within the document. > > Is it possible to somehow append text to an existing block instead of > creating a new one? > My concern is that this might incur a lot of overhead both in terms of > cpu time and memory, especially once the document contains a lot of > text. > > CPU and memory should not be a big issue. There are bigger applications out there that opens complexly formatted documents MBs in size using QTextBlocks. > In this regard I'm also wondering what is the purpose of void > QTextCursor::insertBlock(). > I can't seem to find a way how this group of functions would ever be > useful, but I assume there is a reason they are provided. > > QTextCursor::insertText inserts a new QTextBlock with the current character format. QTextCursor::insertBlock allows you to create a new text block set a format to it and then insert Something on the lines of QTextBlockFormat blockFormat; QTextCharFormat textCharFormat; textCharFormat.setFontPointSize(11); textCharFormat.setFontWeight(QFont::Normal); cursor.insertBlock(blockFormat, textCharFormat); If it is of any relevance I'm using QTextDocument to display output of a > console application, including support color of formatting/coloring > escape sequences etc., which works fine, apart from the large block > count problem. > > Thanks for any advice. > VK > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest > Regards, Gopalakrishna -- My blog http://gkbhat.blogspot.com
_______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
