Hi Cris, great work. I have been thinking about implement this functionality in PySide, but my first idea is implement a class derived by QApplication, that implement the exec_ function in a way where the processEvents is called by a timer. I never try that before then I did not know if this will work.
BR On Sat, Aug 20, 2011 at 7:34 PM, Christopher Lee-Messer <chris.leemes...@gmail.com> wrote: > Hello, > Thanks for all the great work on pyside. > > I've been using PySide in the latest enthought python distribution > (7.1-2) and on > my ubuntu laptop using the pyside PPA. I do interactive signal > analysis and would > like to incorporate pyside into my programs along with ipython. One feature > that > is quite nice about Tkinter and PyQt is that you can continue to run > and interact > with python at the command line while running gui widgets. > > When I try this from python's interpreter or from ipython (version 0.11) with > pyside, the interpreter blocks while the gui elements are active. I looked > into > why by digging through the ipython code and it looks like it tries to invoke > something called QtCore.pyqtRestoreInputHook(). This doesn't exist in PySide. > > Looking at the _tkinter.c code, it seems this is done via python's C-API > using a > pointer, PyOS_InputHook. I'd never heard of it before, but the way it appears > to > work, is that while python is waiting for text input, it calls this function > to > do idle processing--allowing for gui event processing during these idle times. > > I was hoping that PySide could include support for this. Perhaps it already > does > but I didn't find it? > > In an effort to get things working in my use case and to be helpful to the > greater python/pyside cause, I have been experimenting with a prototype. > > Just as warning, it is written starting from a state of profound ignorance: > I have only vague memories of Qt's and python's threading model and > this is first > use of Qt's QCoreApplication::processEvents() . I've made a couple of > guesses about what QCoreApplication > and processEvents did. > > Surprisingly, after some experimentation, my prototype appears to work, at > least > in a few individual cases I've tried. > > My development platform is python 2.7 on linux x86_64 (ubuntu 10.10) > using pyside > 1.05. I linked it to Qt 4.7.3 and libpython2.7 but doesn't depend on the > pyside > code, just Qt. If I knew how to use ctypes to access C++ libraries, > it probably wouldn't even require the compilation step. > > ipython uses git, so I've put the repo at > http://github.com/cleemesser/qt_pyos_input_hook > > Comments are welcome. However, I don't really have time right now to > directly contribute to PySide because of my other duties. I did a > quick look through on shiboken and company and it seemed I was > unlikely to make it through before I ran out of weekend tim. > > I'm hoping that a PySide wizard might be able to use my code as > motivation to easily add the equivalent functions directly to PySide > :-) > > -chris > _______________________________________________ > PySide mailing list > PySide@lists.pyside.org > http://lists.pyside.org/listinfo/pyside > -- Renato Araujo Oliveira Filho Instituto Nokia de Tecnologia - INdT _______________________________________________ PySide mailing list PySide@lists.pyside.org http://lists.pyside.org/listinfo/pyside
