Qt

Update: Simplified Highlighter.highlightBlock function One thing Qt lacks is an integrated spell check in the text entry components. For a project I’m working on this is necessary. Using python-enchant and the QSyntaxHighlighter I was able to implement this functionality. Here is how to add an in line spell check support to a QPlainTextEdit. #!/usr/bin/env python # -*- coding: utf-8 -*- __license__ = 'MIT' __copyright__ = '2009, John Schember ' __docformat__ = 'restructuredtext en' import re import sys import enchant from PyQt4....

My last post was an implementation of a Qt widget which displays text with line numbers. I found that it has a few limitations. The biggest was a performance penalty when dealing with large documents. I’ve since re-factored and rewritten the class to make the performance acceptable. I’ve also cleaned up the code a bit and added a highlight to the current line. ''' Text widget with support for line numbers ''' from PyQt4....

Here is a Qt4 widget written in Python that allows for line numbers next to a QTextEdit. Similar to what is seen in a number of text editors such as gedit and kate. from PyQt4.Qt import QFrame, QWidget, QTextEdit, QHBoxLayout, QPainter class LineTextWidget(QFrame): class NumberBar(QWidget): def __init__(self, *args): QWidget.__init__(self, *args) self.edit = None # This is used to update the width of the control. # It is the highest line that is currently visibile....

Following is a bit of python code that illustrates how to create a QComboBox that attaches to a model for listing history items. The main features of this code are items entered in the text area of the combo are added to the history. Selected items and items entered that already appear in the combo are moved to the top. When MAX_ITEMS is exceeded older items (items at the bottom of the drop down) are removed....

Here is a python script demonstrating how to use QCompleter to complete multiple tags in a QLineEdit. A few features of this script are: removing tags from the drop down that already appear in the QLineEdit, caching the tags, and inserting a , after completion to ease adding more tags. There are a few parts of this script that I’m going to go into detail about. #!/usr/bin/env python ''' Copyright (c) 2009 John Schember Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software....

Not much happened this week. A few bug fixes and a new output format, RTF. It produces acceptable results. It also embeds images into the file. The output could use some tweaking, but this will come with time. The only caveat is the output is ascii only. This is to keep compatibility with Cailbre’s RTF intput which can only accept ascii rtf files. Pluginize has been merged back into trunk. Once a bit of testing is done by Kovid, he will be rolling out a beta for the 0....

It’s come to my attention that while I’ve posted a few eBook formatting tools I wrote and use I never posted how to build them. Since I’m using Qt the easiest way to build them is to use qmake and make. The build process is simple. Create a pro file for the project say fix_end_ebook_txt.pro. Run qmake then run make. You will end up with an executable. Just remember that this requires Qt, make, and a C++ complier (g++ on *nix or mingw on Windows)....

Continuing my work to clean up my eBooks I’ve written another little tool to help. I like for my eBooks to have two blank lines at the end of the file. The only major caveat of this one is it assumes Unix end of lines. Meaning a single n character. In order for this to work correctly use of the dos2unix tool is necessary for files that use a different new line format....

Today I wrote two simple programs to help me clean up my ebooks. I prefer to keep my ebook collection as plain text files with paragraphs separated by a blank line. The first program reflows the paragraphs to put each on a single line. The second removes extraneous whitespace from the file. The reflow is the more intensive of the two. I ran it on the largest ebook I have, Project Gutenberg’s War and Peace by Leo Tolstoy....