Re: [PyQt] Delaying splash screen
Am Thursday 08 September 2011 00:32:17 schrieb Muhammad Bashir Al-Noimi: On 07/09/2011 11:27 م, Hans-Peter Jansen wrote: On Wednesday 07 September 2011, 14:04:02 ad...@mbnoimi.net wrote: Hi guys, I wrote a tiny class for delaying splash screen in C++ but when I tired to re-write it in python it didn't work! I got AttributeError TeSplashScreen object has no attribut QFrate although TeSplashScreen inherited from QFrame Could you please help me, I'm still a newbie in PyQt and Python. tesplashscreen.py from PyQt4.QtCore import * from PyQt4.QtGui import * Hmm, that * imports are easily avoided. Thanks a lot Pete, You mean I don't need to use both import lines? Well, do it sanely with (the proposed standard of): from PyQt4 import QtCore, QtGui You will learn something about the structure of Qt, that is also helpful in understanding the basic concepts. import sys class TeSplashScreen(QFrame): Splash doc app = QApplication(sys.argv) sPixmap = QPixmap(10, 10) sMessage = QString() messages = [nothing] sAlignment = 0 sColor = QColor() def __init__(self, pixmap): You need to call the base class c'tor here, e.g.: super(QFrame, self).__init__() Most of your code below has issues with missing self. references, which will result in access to undefined variables and instances, that are prematurely garbarge collected. I did as you mentioned exactly. I got new issue because I don't know how can I use QStringList class, I read in some article that it's unavailable in PyQt Huch Python 2.6.2 (r262:71600, May 25 2011, 11:48:28) [GCC 4.3.2 [gcc-4_3-branch revision 141291]] on linux2 Type help, copyright, credits or license for more information. from PyQt4 import QtCore sl = QtCore.QStringList() map(sl.append, (a, b, c, d, e)) [None, None, None, None, None] print sl.join(..) a..b..c..d..e so I tried to use python lists instead but I got an exception at for loop TypeError object of type int has no len() You seem to supply an int as second argument to showSplash. here's the modified class: from PyQt4.QtCore import * from PyQt4.QtGui import * import sys class TeSplashScreen(QFrame): Splash doc app = QApplication(sys.argv) sPixmap = QPixmap(10, 10) sMessage = QString() #messages = [nothing] sAlignment = 0 sColor = QColor() def __init__(self, pixmap): super(QFrame, self).__init__() self.sPixmap = pixmap self.setWindowFlags(Qt.FramelessWindowHint|Qt.WindowStaysOnTopHint) self.setAttribute(Qt.WA_TranslucentBackground) self.setFixedSize(self.sPixmap.size()) def clearMessage(self): self.sMessage.clear() self.repaint() def showMessage(self, theMessage, theAlignment, theColor): self.sMessage = theMessage self.sAlignment = theAlignment self.sColor = theColor self.repaint() def paintEvent(self, pe): aTextRect = QRect(self.rect()) aTextRect.setRect(aTextRect.x()+5, aTextRect.y()+5, aTextRect.width()-10, aTextRect.height()-10) aPainter = QPainter(self) aPainter.drawPixmap(self.rect(), self.sPixmap) aPainter.setPen(self.sColor) aPainter.drawText(aTextRect, self.sAlignment, self.sMessage) def showSplash(self, delay, messages, alignment, color): delay = 0 #self.messages = messages alignment = 0 color = QColor(color) class SleeperThread(QThread): msecs = 0 QThread.msleep(msecs) aSplashScreen = TeSplashScreen(self.sPixmap) aSplashScreen.show for i in range(len(messages)): aSplashScreen.showMessage(messages[i], alignment, color) SleeperThread.msleep(delay) Don't expect this to work correctly. Does it? If you want to delay the messages, do it with QTimer triggered updates. Pete ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] segv crashes on mac os around signal statements
Am Friday 09 September 2011 00:27:22 schrieb David Cortesi: I am experimenting with trying to implement a custom signal and having a lot of trouble with the syntax of connect, etc, and while making various changes I am getting frequent SEGV crashes in the QtCore plugin. Below is the abbreviated head of a crash report. Does anybody want to know about these? I don't see any way to submit them at riverbank. You did already ;) but you will need to provide a minimum runnable example to get further help. Pete Path: /System/Library/Frameworks/Python.framework/Versions/2.6/Resources/Py thon.app/Contents/MacOS/Python Version: 2.6 (2.6) Build Info: python-440200~2 Code Type: X86-64 (Native) PlugIn Path: /Library/Frameworks/QtCore.framework/Versions/4/QtCore PlugIn Identifier: QtCore PlugIn Version:4.7.2 (compatibility 4.7.0) Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0001148cc000 Crashed Thread: 0 Dispatch queue: com.apple.main-thread ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] override className() in QMetaClass
Thank you Rafeal, I forgot about that usage of metaclasses. It certainly
cleans things up for me. One thing of note is that the metaclass of QWidget
is not 'type', but 'pyqtWrapperType'. So the invocation should be...
pyqtWrapperType(name, (gui.QWidget,),{'spam':spam, 'yam': yam})
... or more generically
gui.QWidget.__class__(name, (gui.QWidget,),{'spam':spam, 'yam': yam})
Thanks again,
Dan.
2011/9/9 Rafael Durán Castañeda rafadurancastan...@gmail.com
**
I think you can do something like this:
import PyQt4.QtGui as gui
def factory(name):
... def spam(): pass
... def yam(): pass
... return type(name, (gui.QWidget,),{'spam':spam, 'yam': yam})
...
MyClass = factory('MyClass')
MyClass.__mro__
(class '__main__.MyClass', class 'PyQt4.QtGui.QWidget', class
'PyQt4.QtCore.QObject', type 'sip.wrapper', class
'PyQt4.QtGui.QPaintDevice', type 'sip.simplewrapper', type 'object')
On 08/09/11 23:33, Daniel Goertzen wrote:
Does pyqt provide a way to override the class name when deriving a QObject
based class?
An example of why this is wanted:
def my_widget_class_factory(...):
class temp(QWidget):
...(dynamically generate class attributes and methods)
return temp
All classes generated by the above function will come back with
className() as temp. This causes headaches for Designer.
I know I can add a metaclass to mangle the class name, but I was
wondering there was an easier way (ie, does QObject's metaclass provided a
way to rename the class?)
Thanks,
Dan.
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Re: [PyQt] Embedding MPlayer in a QWidget // painting problems
Thanks, I'm giving VLC a try and it seems to be working okay. Probably a question for the VLC forums (I'll copy a post there in a minute...), but I don't understand why I can't get autocropping to work. I'm using self.Instance = vlc.Instance(--no-audio, --play-and-pause, --autocrop) within my program, and I've tried using the same arguments on the command line but no joy. Should I be adding any other arguments to include this filter? I'm using the precompiled version of vlc.py which came with the Qt bindings; under Windows 7, PyQt4 and Python 3.2. MPlayer was also working well embedded into a QWidget, only the background was destroyed in resizing when paused or stopped as described in my earlier posting below. I attempted also to take screenshots using QPixmap.grabWindow() and .grabWidget() but these only return an empty image. I'd still like to understand this behaviour if anyone has any ideas. Thanks. Best regards, Timothy Grove On 04/09/2011 13:45, Jo Jürgens wrote: If you can use VLC instead of Mplayer, there are Python/Qt bindings for it that seem to work fine http://wiki.videolan.org/Python_bindings On Sun, Aug 28, 2011 at 4:27 PM, Timothy W. Grove tim_gr...@sil.org mailto:tim_gr...@sil.org wrote: I've been successful in embedding the MPlayer video player into a QWidget thanks to the PyMPlayer application (http://code.google.com/p/python-mplayer/). Resizing the QWidget resizes a movie just fine while the movie is playing, but once a movie is paused or stopped, no resizing of the displayed frame occurrs and even worse, if the window size is decreased so that it covers the movie, that area of the movie frame is erased. I'm wondering if someone could suggest what issues 'might' be involved here? Thanks for any ideas! Best regards, Tim ___ PyQt mailing list PyQt@riverbankcomputing.com mailto:PyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] Icon size and label position in QPushButton?
I am creating a button with an icon: icon = QIcon ( iconFile ) button = QPushButton( icon, label, parent ) The icon as saved in the file is rather large, but is always scaled down to a tiny size when displayed in the button. Is there any way to get the QPushButton to display the icon at full size?Also, is there any way to get the QPushButton to display the label below the icon (instead of to the right)? ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Icon size and label position in QPushButton?
Le 09/09/11 16:05, Maxwell, Thomas P. (GSFC-606.2)[SCIENCE APPLICATIONS INTL CORP] a crit: I am creating a button with an icon: icon = QIcon ( iconFile ) button = QPushButton( icon, label, parent ) The icon as saved in the file is rather large, but is always scaled down to a tiny size when displayed in the button. Is there any way to get the QPushButton to display the icon at full size?Also, is there any way to get the QPushButton to display the label below the icon (instead of to the right)? ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt For the icon you can fix his size button.setIconSize(32, 32) ... if the button's size is minimum 32 x 32 For the position of text, consider to use QToolButton instead of QPushButton button.setToolButtonStyle(style) See here for style: http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qt.html#ToolButtonStyle-enum Regards -- Vincent V.V. Oqapy . Qarte+7 . PaQager ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Embedding MPlayer in a QWidget // painting problems
Just out of curiosity, why don't you use phonon? I currently using mplayer and saw that phonon can now display rtsp streams (which I use) Is there a reason not to use phonon and go with mplayer/vlc? Regards, -- Emmanuel On 14:55 Fri 09 Sep , Timothy W. Grove wrote: Thanks, I'm giving VLC a try and it seems to be working okay. Probably a question for the VLC forums (I'll copy a post there in a minute...), but I don't understand why I can't get autocropping to work. I'm using self.Instance = vlc.Instance(--no-audio, --play-and-pause, --autocrop) within my program, and I've tried using the same arguments on the command line but no joy. Should I be adding any other arguments to include this filter? I'm using the precompiled version of vlc.py which came with the Qt bindings; under Windows 7, PyQt4 and Python 3.2. MPlayer was also working well embedded into a QWidget, only the background was destroyed in resizing when paused or stopped as described in my earlier posting below. I attempted also to take screenshots using QPixmap.grabWindow() and .grabWidget() but these only return an empty image. I'd still like to understand this behaviour if anyone has any ideas. Thanks. Best regards, Timothy Grove On 04/09/2011 13:45, Jo Jürgens wrote: If you can use VLC instead of Mplayer, there are Python/Qt bindings for it that seem to work fine http://wiki.videolan.org/Python_bindings On Sun, Aug 28, 2011 at 4:27 PM, Timothy W. Grove tim_gr...@sil.org mailto:tim_gr...@sil.org wrote: I've been successful in embedding the MPlayer video player into a QWidget thanks to the PyMPlayer application (http://code.google.com/p/python-mplayer/). Resizing the QWidget resizes a movie just fine while the movie is playing, but once a movie is paused or stopped, no resizing of the displayed frame occurrs and even worse, if the window size is decreased so that it covers the movie, that area of the movie frame is erased. I'm wondering if someone could suggest what issues 'might' be involved here? Thanks for any ideas! Best regards, Tim ___ PyQt mailing list PyQt@riverbankcomputing.com mailto:PyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt -- Emmanuel ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] [SIP] Python crash with QString
Hi,
I've got a SIP wrapper for a C++ library and have some issue
with running under Win32 after compiling with Visual Studio 10.
Within the library I have a number of functions that return
QString objects or (mostly const) references. Under Linux every-
thing works fine, e.g. if I do in a Python script
print yaba.Version.text( )
I get the version string (which is a QString returned by the
wrapped library) output to the screen. Under Windows Python
crashes after outputting the string with an access violation
(C005). The crash seems to happen whenever I use a QString
object (or reference) returned by the library wrapped with SIP,
e.g. also
print yaba.Version.text( ).length( )
crashes. The same happens with all other methods of the
QString class I tried.
I can avoid the crash in this case by assigning the QString
object to another Python variable first, i.e. with
dummy = yaba.Version.text( )
print dummy
it seems to work.
To confirm that this is a problem with QString I then wrote
an extremely simple library, containing just a single class
with a single (static) method that returns a QString, plus an
equally simple SIP wrapper for it. Again, everything works
fine under Linux but crashes under Windows the first time the
QString (or PyQt4.QtCore.QString) object is used. And with
this much simplified library even the trick of copying
the QString to a local variable first doesn't work anymore.
The error is again an access violation and as far as I can
tell it seems to be an attempt to write to address 0x0.
The SIP version I'm using under Windows is 4.12.2 (under
Linux it's 4.10.1). The Windows version is 7 Professional
32-bit and the compiler Visual Studio 10. Has anyone an idea
what could be behind this? Since I have nearly no experience
with Windows and, after having struggled for two weeks to get
the whole stuff to built, I'm not too keen on spending what's
probably's going to be another month to learn how to obtain a
debug built under this environment, thus I can at the moment
only report my observations and no more details...
To check for possible memory problems with the simple library
(though I can't see where any could come from) I also run the
Linux version under valgrind and just got the usual complaints
about stuff from what looks like somewhere deep in the inter-
nals Python, but nothing that would let me suspect that there's
anything broken in the library.
I append the relevant code of the simple library and SIP wrap-
per below (with qs_lib.hpp and qs_lib.cpp being the code for
the library to be SIP-wrapped, qs_sip.sip the SIP wrapper and
qs.py the script that crashes Python) in the hope that it is
of any help.
Best regards, Jens
- qs_lib.hpp --
#ifndef QS_HPP_
#define QS_HPP_
#if ! defined _MSC_VER // this isn't MS Visual Studio
#define DLL_STUFF
#else
#if defined BUILDING_LIB
#define DLL_STUFF __declspec( dllexport )
#else
#define DLL_STUFF __declspec( dllimport )
#endif
#endif
#include QString
class DLL_STUFF QS {
public:
static QString text( );
};
#endif
- qs_lib.cpp --
#include qs_lib.hpp
QString
QS::text( ) {
return QString( Hello world );
}
- qs_sip.sip --
%Module qs_sip 0
%Import QtCore/QtCoremod.sip
%Import QtGui/QtGuimod.sip
class QS
{
%TypeHeaderCode
#include qs_lib.hpp
%End
public:
static QString text( );
};
- qs.py --
import qs_sip as qs
print qs.QS.text( )
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Re: [PyQt] [SIP] Python crash with QString
Well, my educated guess is it's because PyQt4 is being compiled with VS2010, but the Python binaries are all compiled under VS2008. I've had issues before trying to use sip/PyQt4 compiled with VS2010, with Python compiled with 2008, in that strings would end up being blank or having odd crashes going from C++ to Python. To keep it short, I do not recommend you mix dlls created with VS2010 with Python built under VS2008, it has tended to cause issues at least for me. On Fri, Sep 9, 2011 at 9:20 PM, Jens Thoms Toerring j...@toerring.de wrote: Hi Demetrius, On Fri, Sep 09, 2011 at 09:04:28PM +, Demetrius Cassidy wrote: Is Python also compiled with VS2010? Honestly, I can't tell - I got that installation and was told to use it as it is. My guess is that the Python version (2.7) was simply a binary download, gotten from somewhere I have no ideas about. Is there a way to find out about that? And would that make a lot of a difference? All I can tell at the moment is that a lot of other stuff that to me looks much nore complex to me seems to work. Please keep in mind that my experience with Windows is basically non-existent, so I need quite a bit of handholding and probably will have to ask really stupid ques- tions... Thanks and best regards, Jens -- \ Jens Thoms Toerring j...@toerring.de \___ http://toerring.de ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
