[PyQt] Rapid GUI Programming with Python and Qt
Hello, I would ike to have infos about the future new version for Python 3 of this great book. Is there a publication date ? C. ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] question about dip observe handler
On Sun, 18 Jul 2010 18:11:15 -0400, Darren Dale dsdal...@gmail.com wrote: I am reading the dip documentation at http://www.riverbankcomputing.co.uk/static/Docs/dip/complete_example.html , and have a question about the following: dip will invoke an observe() handler when the value of an attribute is set, even if the new value is the same as the old one. We therefore use the _propagate_changes attribute to prevent possible recursion problems Why is it necessary to invoke the observe handler when the value of an attribute does not change? There are quite a few infinite-recursion workarounds in the example. If the possibility of infinite recursion is so high, perhaps by default the handler should not be invoked if the attribute value does not change, unless observe() was called with a kwarg to invoke the handler regardless? Good question. The short answer is that it was easiest for me, but (obviously) what matters is what's easier for developers using it. The issue is to define what is meant by changed, particularly when the attribute is a class instance? Rebinding the attribute is obviously a change, but what about a change to an attribute of the instance? Phil ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] ANN: dip v0.1 Released - An Application Development Framework for PyQt and Python v3
and when do you plan to support python 2.6.x? On 7/17/10, Phil Thompson p...@riverbankcomputing.com wrote: On Sat, 17 Jul 2010 21:09:04 +0200, Antonio Valentino antonio.valent...@tiscali.it wrote: Hi Phil, Il giorno Sat, 17 Jul 2010 18:02:57 +0100 Phil Thompson p...@riverbankcomputing.com ha scritto: dip v0.1 has been released. This is the first release of dip, an application development framework for PyQt and (for the moment at least) Python v3. The user documentation, including tutorials and a full API reference is available at http://www.riverbankcomputing.com/static/Docs/dip/index.html dip is suitable for developing simple utilities and large scale, complex applications. It includes the following features... [...] first of all congratulations for the great job. I have still not finished to read the docs but it seems to me that many of the features provided by dip are also present in the enthought framework (Traits, Envisage, etc.). Agreed. I've worked with Enthought for several years and did the original port to PyQt amongst other things. There is a lot of good stuff in it. I would like to ask you why you decided to develop a new framework and which are advantages/drawbacks of using dip instead of enthought. There were many reasons to create a new framework, one being the need for Python v3 support and the desire to use Python v3 features. Another significant reason was the way that the Enthought stuff implements toolkit independence, ie. the compromises it makes in order to support wx and PyQt. As a PyQt programmer you often end up being frustrated that you can't get your GUIs to do what you want because TraitsUi is getting in the way. In dip, QWidgets are first class objects. When you create a GUI you get a QWidget, not something that wraps a QWidget in an API that is designed to support wx. Another example (which you'll understand if you are familiar with Traits) is that dip allows you to do... class MyClass(QObject, Model): ... ...where Model is the dip equivalent of HasTraits. Of course the Enthought stuff is very mature and has lots of stuff that dip doesn't have - for example it is very good for engineering applications that need 2D and 3D visualisation. Phil ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt -- Lic. José M. Rodriguez Bacallao Centro de Biofisica Medica - Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo mismo. Recuerda: El arca de Noe fue construida por aficionados, el titanic por profesionales - ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] question about dip observe handler
On Mon, Jul 19, 2010 at 9:33 AM, Phil Thompson p...@riverbankcomputing.com wrote: On Sun, 18 Jul 2010 18:11:15 -0400, Darren Dale dsdal...@gmail.com wrote: I am reading the dip documentation at http://www.riverbankcomputing.co.uk/static/Docs/dip/complete_example.html , and have a question about the following: dip will invoke an observe() handler when the value of an attribute is set, even if the new value is the same as the old one. We therefore use the _propagate_changes attribute to prevent possible recursion problems Why is it necessary to invoke the observe handler when the value of an attribute does not change? There are quite a few infinite-recursion workarounds in the example. If the possibility of infinite recursion is so high, perhaps by default the handler should not be invoked if the attribute value does not change, unless observe() was called with a kwarg to invoke the handler regardless? Good question. The short answer is that it was easiest for me, but (obviously) what matters is what's easier for developers using it. Perhaps the example would be easier to understand (and to develop from scratch) with such a change. The issue is to define what is meant by changed, particularly when the attribute is a class instance? Rebinding the attribute is obviously a change, but what about a change to an attribute of the instance? The last example is another slightly different use case. The way enthought supports it is documented at http://code.enthought.com/projects/traits/docs/html/traits_user_manual/notification.html#example-of-a-dynamic-notification-handler . Darren ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Rapid GUI Programming with Python and Qt
On Mon, 19 Jul 2010 15:06:12 +0200 (CEST) projet...@club-internet.fr wrote: Hello, I would ike to have infos about the future new version for Python 3 of this great book. Is there a publication date ? Hi C, I would very much like to do a new edition of the PyQt book, but it will probably not be for another year or two due to other commitments. I want the next edition to be based on Python 3.1 (or later). Also, I am hoping that by the time I'm ready to start on it PySide will support Python 3 and will be sufficiently compatible with PyQt that I can cover both in the same book without confusing readers. For those who can't wait I have converted all the book's examples to Python 3.0 (using PyQt API 1) and to Python 3.1 (using PyQt API 2). I had expected the conversion to Python 3.1 and API 2 to be rather difficult, but in the end it was pretty straightforward, so the differences between what's shown in the book and the Python 3.1 versions of the examples are either non-existent or easy to see and understand. I've put a few notes on the most problematic classes at the bottom of the book's web page: http://www.qtrac.eu/pyqtbook.html (This is also where the links to the Python 3 examples are located.) On a personal note, last week I finished converting all my own Python programs to Python 3.1 using the 2to3 tool and then manually converting str % usage to str.format(). This includes some PyQt GUI programs that I use every day:-) -- Mark Summerfield, Qtrac Ltd, www.qtrac.eu C++, Python, Qt, PyQt - training and consultancy Programming in Python 3 - ISBN 0321680561 http://www.qtrac.eu/py3book.html ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] Embedding PyQt scripts into Qt applications - manual update
Hi PyQt trolls, I have finally updated my manual about embedding PyQt scripts into Qt C++ applications (up to last versions of Qt and PyQt). You may find it interesting - it opens a way to create hybrid applications where you have both C++ and Python codes running together and both using Qt Api. link: http://lynxline.com/qt-python-superhybrids/ ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] Get Signals from all buttons in the form
Hi, I have a form with 12 QPushButtons and need to connect the signals to the corresponding button pressed without have to use the usual self.connect(obj,SIGNAL(),self.function), because I don't khow many buttons where made. Yes I'm a newbe. Thank you in advance. ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] QDomElement set text?
If I have an XML element such as mirrorhhello/mirrorh I can retrieve its text (hello) using the method .text(), but how do I set it? Or do I somehow have to use a QTextNode to set the QDomElement? Any thoughts? Thanks, -Scott ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Get Signals from all buttons in the form
starglider develop wrote: Hi, I have a form with 12 QPushButtons and need to connect the signals to the corresponding button pressed without have to use the usual self.connect(obj,SIGNAL(),self.function), because I don't khow many buttons where made. Read the documentation for QButtonGroup. Set it to non-exclusive, and it can signal if any button is pressed. Doug ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Get Signals from all buttons in the form
or: buttons = [QPushButton(button %d % i) for i in range(12)] for button in buttons: button.clicked.connect(lambda button=button: do_something(button)) On Tue, Jul 20, 2010 at 8:57 AM, Doug Bell do...@bellz.org wrote: starglider develop wrote: Hi, I have a form with 12 QPushButtons and need to connect the signals to the corresponding button pressed without have to use the usual self.connect(obj,SIGNAL(),self.function), because I don't khow many buttons where made. Read the documentation for QButtonGroup. Set it to non-exclusive, and it can signal if any button is pressed. Doug ___ PyQt mailing list p...@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Rapid GUI Programming with Python and Qt
Hi Mark Summerfield, I am fan of your book Rapid GUI Programming with Python and Qt. Its pleasure to have new edition. But two year is little long I have found the pyqt does not have any support for the classes for embedded linux. But David Boddie has given some support for it in http://bitbucket.org/dboddie/pyqt4-for-embedded-linux. I wish please you to include support for it in next edition, such as how to port it to embedded linux / embedded systems Sathishkumar On Mon, Jul 19, 2010 at 9:07 PM, Mark Summerfield l...@qtrac.plus.comwrote: On Mon, 19 Jul 2010 15:06:12 +0200 (CEST) projet...@club-internet.fr wrote: Hello, I would ike to have infos about the future new version for Python 3 of this great book. Is there a publication date ? Hi C, I would very much like to do a new edition of the PyQt book, but it will probably not be for another year or two due to other commitments. I want the next edition to be based on Python 3.1 (or later). Also, I am hoping that by the time I'm ready to start on it PySide will support Python 3 and will be sufficiently compatible with PyQt that I can cover both in the same book without confusing readers. For those who can't wait I have converted all the book's examples to Python 3.0 (using PyQt API 1) and to Python 3.1 (using PyQt API 2). I had expected the conversion to Python 3.1 and API 2 to be rather difficult, but in the end it was pretty straightforward, so the differences between what's shown in the book and the Python 3.1 versions of the examples are either non-existent or easy to see and understand. I've put a few notes on the most problematic classes at the bottom of the book's web page: http://www.qtrac.eu/pyqtbook.html (This is also where the links to the Python 3 examples are located.) On a personal note, last week I finished converting all my own Python programs to Python 3.1 using the 2to3 tool and then manually converting str % usage to str.format(). This includes some PyQt GUI programs that I use every day:-) -- Mark Summerfield, Qtrac Ltd, www.qtrac.eu C++, Python, Qt, PyQt - training and consultancy Programming in Python 3 - ISBN 0321680561 http://www.qtrac.eu/py3book.html ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
