GUI Programming with Python: QT Edition

GUI Programming with PyQT

 

GUI Programming with Python: QT Edition

GUI Programming with Python: QT Edition

Boudewijn Rempt

Copyright © 2001 by Commandprompt, Inc

 

Copyright (c) 2001 by Command Prompt,
Inc. This material may be distributed only subject to the
terms and conditions set forth in the Open Publication
License, v1.0 or later (the latest version is presently
available at http://www.opencontent.org/openpub/).

‘Distribution of substantively modified
versions of this document is prohibited without the explicit
permission of the copyright holder.' to the license reference
or copy.

‘Distribution of the work or derivative
of the work in any standard (paper) book form is prohibited
unless prior permission is obtained from the copyright
holder.' to the license reference or copy.

 

 

Although every reasonable effort has been made to
incorporate accurate and useful information into this book,
the copyright holders make no representation about the
suitability of this book or the information therein for any
purpose. It is provided "as is" without expressed
or implied warranty.

 

 

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Dedication

This book is dedicated to Irina.

List of Tables

1-1. GUI Toolkits for Python

7-1. Matrix of
QObject.connect()
combinations.

10-1. Qt and Python high-level datastructures

10-2. Qt and Python network classes

C-1. C++ access specifiers and sip

C-2. Command line options

C-3. Macros in Makefile Templates

C-4. Flags in member function declaration

C-1. Error flags in sipParseArgs()

C-2. Format specifiers for
sipParseArgs()

List of Figures

10-1. Qt Inheritance Hierarchy (only the most important classes)

10-2. Object Ownership Hierarchy

20-1. Playing with eval()

20-2. Playing with exec

20-3. Playing with
execfile()

List of Examples

1-1. Bootstrapping a Python application

6-1. hello1.py — hello world

6-2. hello2.py — a better hello world

6-3. fragment from hello3.py

6-4. Fragment from hello5.py

6-5. Fragment from hello4.py

6-6. frmconnect.py

6-7. dlgconnect.py — the subclass of the generated form

7-1. A stupid button which is not reusable

7-2. A simple callback system

7-3. A central registry of connected widgets

7-4. Connecting a signal to a slot

7-5. Connection a dial to a label with signals and slots

7-6. Python signals and slots

7-7. Python signals and slots with arguments

7-8. datasource.py — connecting and disconnecting signals and
slots

7-9. An XML parser with signals and slots

8-1. qstring1.py — conversion from
QString to a Python string.

8-2. qstring2.py - second try of saving a
QString to a file

8-3. empty.py - feeding zero bytes to a QCString

8-4. null.py - empty and null QCStrings and Python
strings

8-5. emptyqstring.py - feeding zero bytes to a
QString

8-6. Loading an utf-8 encoded text

8-7. Building a string from single Unicode
characters

8-8. sitecustomize.py — saving a useful
function from wanton destruction

8-9. uniqstring3.py - messing with Unicode strings
using utf-8 as default encoding

8-10. uniqstring1.py - coercing Python strings into
and from QStrings

8-11. uniqstring2.py - coercing Python strings into and from
QStrings

9-1. refs.py - showing object references

9-2. circular.py - circululululular references

9-3. qtrefs1.py — about Qt reference counting

9-4. qtrefs2.py - keeping a Qt widget alive

9-5. qtrefs3.py - Qt parents and children

9-6. Eradicating a widget

9-7. children.py - getting the children from a single
parent

9-8. Iterating over children

9-9. sigslot.py - a simple signals/slots implementation
in Python, following the Observer pattern

9-10. Object introspection using Qt

9-11. Object introspection using Python

10-1. event1.py - handling mouse events in PyQt

10-2. action.py - Using a QAction to group data associated with
user commands

10-3. fragment from mdi.py - ten little scribbling windows

10-4. event2.py - using QWidget to create a custom,
double-buffered drawing widget.

10-5. snippet from event3.py - a peach puff drawing
board

10-6. fragment from action2.py - You cannot create a
QPixmap before a QApplication

10-7. buttons.py - Four pushbuttons saying
‘hello'.

10-8. label.py - a label associated with an
edit control

10-9. radio.py - a group of mutually exclusive
options

10-10. listbox.py - A listbox where data can be
associated with an entry

10-11. tree.py - building a tree

10-12. layout.py - two box layouts and adding and removing buttons
dynamically to a layout

10-13. geometry.py - setting the initial size of an
application

10-14. dialogs.py - opening message and default dialogs boxes

10-15. fragment from dialogs.py - opening a file dialog

10-16. fragment from dialogs.py - opening a font dialog

10-17. fragment from dialogs.py - opening a color dialog

10-18. from dv_qt.py - using Qt utility
classes

10-19. fragment from db_python.py - using Python utility classes

10-20. Using QMimeSourceFactory (application.py)

10-21. thread1.py — Python threads without
gui

10-22. Python threads and a PyQt gui window

11-1. dlgcomplex.py — a subclass of frmcomplex.py

11-2. Setting default values

12-1. A simple document-view framework

12-2. Scripting an application is easy

13-1. Defining a complex toggle action

15-1. A testcase for a document manager

15-2. The document manager class

15-3. The document class

15-4. The view class

15-5. The application class

21-1. typometer.py - A silly type-o-meter that keeps a
running count of how many characters are added to a certain
document and shows a chart of the typerate...

21-2. charmap.py - a Unicode character selection
widget

22-1. remote.py - remote control application

22-2. view.py - the main view of the remote control
application

22-3. button.py - the class that implements the pixmapped
buttons

22-4. A Qt 2 custom style - a minimalist
implementation of the classic Mac style in PyQt.

22-5. Testing styles

23-1. Handling drop events

23-2. Drag and drop

25-1. Installing the translator

26-1. README

26-2. setup.py - a sample setup script

26-3. MANIFEST.in

C-1. Interface for
QRegExp::match