Re: [PyQt] Model/View, QTreeView, drag/drop and arbitrary objects
On Tue, 24 Mar 2009 11:44:41 +1000, Scott Ballard sc...@scottballard.net wrote: Hi, I'm trying to put together a QTreeView using the Model/View programming but using either the Python Object class or QObject class as the data. It seems that neither can be passed around as MIME/QDataStream data for the drag and drop functionality. This looks the be a limitation of the PyQt implementation and not of Qt itself. Would be great if the documentation explicitly mentioned that they didn't implement Q_DECLARE_METATYPE() functionality under QMetaType instead having dead links to the method. The current implementation seems to only support a small subset of PyQt classes (QStringList and a couple others) These are no good for handling objects with a lot of custom attributes. I'm wondering if anyone has successfully done this before and what the trick is? Do you have any example code? There was mention of supporting arbitrary Python objects and QDataStream in the PyQt roadmap but no mention of when it might be completed. I understand that it won't be included in PyQT 4.5. I really hope that I am overlooking something as my application hinges around this. The model/view programming seems great for simple stuff but falls apart quickly for more high level uses. Someone must have figured this out before!? The following may help... https://svn.enthought.com/enthought/browser/TraitsBackendQt/trunk/enthought/traits/ui/qt4/clipboard.py ...which shows how to define a MIME type for a Python object and put it on the clipboard. Phil ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QSplashScreen with transparent background
On Tue, Mar 24, 2009 at 8:52 AM, David Douard david.dou...@logilab.fr wrote: pic = QtGui.QPixmap(:splash/images/splash.png) splash = QSplashScreen(pic, Qt.WindowStaysOnTopHint) splash.setMask(pic.mask()) splash.show() Yeah! That worked for me!! Thank you both!! :) -- Saúl -- Nunca subestimes el ancho de banda de un camión lleno de disketes. http://www.saghul.net/ ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] possible regression in PyQt/sip snapshots
I have been keeping up to date with the snapshots, and after installing them I try to launch Eric4 and I get a segfault. I think this simple example, adapted from eric4's Debugger/BreakPointModel.py, might illustrate the problem: from PyQt4 import QtCore alignment = QtCore.QVariant(QtCore.Qt.Alignment(QtCore.Qt.AlignLeft)) When I run that script, I get: Traceback (most recent call last): File test_alignment.py, line 3, in module alignment = QtCore.QVariant(QtCore.Qt.Alignment(QtCore.Qt.AlignLeft)) TypeError: unable to convert a Python 'Alignment' object to a C++ 'Qt::Alignment' instance Can anyone please confirm? Darren ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] possible regression in PyQt/sip snapshots
On Tue, 24 Mar 2009 10:13:16 -0400, Darren Dale dsdal...@gmail.com wrote: I have been keeping up to date with the snapshots, and after installing them I try to launch Eric4 and I get a segfault. I think this simple example, adapted from eric4's Debugger/BreakPointModel.py, might illustrate the problem: from PyQt4 import QtCore alignment = QtCore.QVariant(QtCore.Qt.Alignment(QtCore.Qt.AlignLeft)) When I run that script, I get: Traceback (most recent call last): File test_alignment.py, line 3, in module alignment = QtCore.QVariant(QtCore.Qt.Alignment(QtCore.Qt.AlignLeft)) TypeError: unable to convert a Python 'Alignment' object to a C++ 'Qt::Alignment' instance Can anyone please confirm? Should be fixed in tonight's PyQt snapshot. However I don't see how it might cause a crash. Thanks, Phil ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] PyQt and Python v3
Phil Thompson wrote: The current SIP and PyQt4 snapshots now support Python v3. The build process is exactly the same - just use the right interpreter to run configure.py. I'm still working through the examples - so far they have all run under Python v3 without any changes. oh excellent news! I didn't expect to see anything working so soon actually. How much work can we expect for getting Python 2 .sip files working on Python 3? Did you encounter many problems with hand written code? cheers, -- Simon Edwards | KDE-NL, Guidance tools, Guarddog Firewall si...@simonzone.com | http://www.simonzone.com/software/ Nijmegen, The Netherlands | ZooTV? You made the right choice. ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] QThread problem in linux
Hi, I have a small QThread problem here. I'm trying to do a small progress bar in my app while my app is working. I have already tried QApplication.processEvents() which works very well in Windows but screws everything up in Linux. When I use it my app receives key events only once in 10 tries, its completely unreliable. Now I have read in a kde mailing list that QApplication.processEvents() is a bad thing anyway I have tried putting the progress bar in its own thread. This is my ProgreassBar class code: class ProgressBarThread(QThread): def __init__(self, min, max, moduleName): QThread.__init__(self) self.progress = QProgressDialog(Loading + moduleName, Abort Loading, min, max, None); self.progress.setWindowModality(Qt.WindowModal) def setProgress(self, progress, labelText): self.progress.setLabelText(labelText) self.progress.setValue(progress) def run(self): self.progress.show() self.exec_() And how I use it: def loadModule(self, moduleName): t = og.Timer() self.progress = ProgressBarThread(0, 8, moduleName) self.progress.start() for m in self.moduleList: if m.name == moduleName: if m.hasDependencies: # load modules on wich the main module depends before the main module is loaded for moduleDependencie in m.moduleDependencies: for m2 in self.moduleList: if m2.name == moduleDependencie: self.progress.setProgress(2, Loading Dependencie: + moduleDependencie) m2.load() self.modelSelectionDialog.scanDirForModels(m2.moduleRoot) self.materialSelectionDialog.scanDirForMaterials(m2.moduleRoot) self.mainModuledependencieList.append(m2) self.progress.setProgress(4, Loading + moduleName) m.load() self.progress.setProgress(6, Scan for models...) self.modelSelectionDialog.scanDirForModels(m.moduleRoot) self.progress.setProgress(8, Scan for materials) self.materialSelectionDialog.scanDirForMaterials(m.moduleRoot) self.mainModule = m self.moduleExplorer.setCurrentModule(m) self.progress.quit() print Time to load module: + str(t.getMilliseconds() / 1000.0) + seconds del t When using this I get a few warnings: QPixmap: It is not safe to use pixmaps outside the GUI thread QCoreApplication::sendPostedEvents: Cannot send posted events for objects in another thread And the worst: X Error: RenderBadGlyphSet (invalid GlyphSet parameter) 181 Extension: 155 (RENDER) Minor opcode: 25 (RenderCompositeGlyphs32) Resource id: 0x0 When I get this error no text in my application is drawn at all. The strange thing is, when I have a cleanly booted system, it works very well the first time I start the application. On the second time I don't get any text. Two screen shots: How it looks without text: http://picasaweb.google.de/some.fusion/Lockenwickler?feat=directlink#5316822651416543426 And how it should look: http://picasaweb.google.de/some.fusion/Lockenwickler?feat=directlink#5316822694766353394 I don't know what I'm doing wrong here, I'm very new to the Threading stuff. In case anybody wonders what my app is all about, its a game editor for an open source game. http://www.youtube.com/watch?v=J-1ekVyv19o and http://www.youtube.com/watch?v=R0ZKMbLtXYY Sorry for this long email! Thank you very much! Stefan Stammberger ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QThread problem in linux
(ack sorry I pressed the wrong button and sent it before it was done.
Here is the exciting conculsion . . .)
I think what you probably want to do here is to put your loadModule()
function in a thread instead of the the progress dialog. That is to
say the program that you want to run in the background is in the
thread.
Then to communicate with the progress dialog, you can have
loadModule() emit events.
To have the dialog communicate with the thread (to cancel for example)
the simplest way is to give them both access to a variable that
defines the cancel state. Then have your thread check this variable
occasionally.
The harder part is making sure that your thread can properly access
everything else that it needs in your application. To do this you
will probably want to make use of a QMutexLocker in your thread.
I home some of this is helpful, I am not an expert on multithreaded
programming (though I have build a couple of applications). Keeping
everything straight is kinda hard.
Novi
Here is a small example:
class LoadModuleThread(QThread):
def __init__(self, moduleName):
QThread.__init__(self)
self.mutex = QtCore.QMutex()
def run(self):
with QtCore.QMutexLocker(self.mutex) as locker:
t = og.Timer()
for m in self.moduleList:
if m.name == moduleName:
if m.hasDependencies: # load modules on wich the
main module depends before the main module is loaded
for moduleDependencie in m.moduleDependencies:
for m2 in self.moduleList:
if m2.name == moduleDependencie:
self.emit(QtCore.SIGNAL('setProgress'), 2, Loading Dependencie: +
moduleDependencie)
m2.load()
self.emit(QtCore.SIGNAL('setProgress'), 4, Loading +
moduleName)
m.load()
self.emit(QtCore.SIGNAL('loadingDone'))
print Time to load module: + str(t.getMilliseconds() /
1000.0) + seconds
def startLoadingModules(self):
self.thread = LoadModuleThread(moduleName)
self.connect(self.thread
,QtCore.SIGNAL('setProgress')
,self.setProgress)
self.connect(self.thread
,QtCore.SIGNAL('loadingDone')
,self.setProgressDone)
self.progress = QProgressDialog(Loading + moduleName, Abort
Loading, min, max, None);
self.progress.setWindowModality(Qt.WindowModal)
self.progress.show()
self.thread.start()
def setProgress(self, progress, labelText):
self.progress.setLabelText(labelText)
self.progress.setValue(progress)
def setProgressDone(self):
self.progress.quit()
---
On Tue, Mar 24, 2009 at 11:38 AM, Stefan Stammberger
sstammber...@web.de wrote:
Hi,
I have a small QThread problem here. I'm trying to do a small progress bar in
my app while my app is working. I have already tried
QApplication.processEvents() which works very well in Windows
but screws everything up in Linux. When I use it my app receives key events
only once in 10 tries, its completely unreliable. Now I have read in a kde
mailing list that QApplication.processEvents()
is a bad thing anyway I have tried putting the progress bar in its own
thread. This is my ProgreassBar class code:
class ProgressBarThread(QThread):
def __init__(self, min, max, moduleName):
QThread.__init__(self)
self.progress = QProgressDialog(Loading + moduleName, Abort
Loading, min, max, None);
self.progress.setWindowModality(Qt.WindowModal)
def setProgress(self, progress, labelText):
self.progress.setLabelText(labelText)
self.progress.setValue(progress)
def run(self):
self.progress.show()
self.exec_()
And how I use it:
def loadModule(self, moduleName):
t = og.Timer()
self.progress = ProgressBarThread(0, 8, moduleName)
self.progress.start()
for m in self.moduleList:
if m.name == moduleName:
if m.hasDependencies: # load modules on wich the main module
depends before the main module is loaded
for moduleDependencie in m.moduleDependencies:
for m2 in self.moduleList:
if m2.name == moduleDependencie:
self.progress.setProgress(2, Loading
Dependencie: + moduleDependencie)
m2.load()
self.modelSelectionDialog.scanDirForModels(m2.moduleRoot)
self.materialSelectionDialog.scanDirForMaterials(m2.moduleRoot)
self.mainModuledependencieList.append(m2)
self.progress.setProgress(4, Loading + moduleName)
m.load()
self.progress.setProgress(6, Scan for models...)
Re: [PyQt] PyQt and Python v3
On Tue, 24 Mar 2009 19:54:05 +0100, Simon Edwards si...@simonzone.com wrote: Phil Thompson wrote: The current SIP and PyQt4 snapshots now support Python v3. The build process is exactly the same - just use the right interpreter to run configure.py. I'm still working through the examples - so far they have all run under Python v3 without any changes. oh excellent news! I didn't expect to see anything working so soon actually. How much work can we expect for getting Python 2 .sip files working on Python 3? Did you encounter many problems with hand written code? Grep the .sip files for PY_MAJOR_VERSION to see how much version dependent stuff - not a lot and (I think) mostly to do with __repr__ implementations. The main thing you will need to do is to identify any function arguments that should be interpreted as an unencoded byte stream rather than UTF-8 encoded text. I've tried to be flexible in what string conversions are allowed - it's not as simple as mapping QString to a v3 string object and char * to a v3 bytes object. I've come to the conclusion that it is a fairly easy task to write code that will run under v2.6 and v3.x without change. Phil ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] PyQt and Python v3
On Tue, 24 Mar 2009 20:31:21 +0100, Detlev Offenbach det...@die-offenbachs.de wrote: On Dienstag, 24. März 2009, Phil Thompson wrote: The current SIP and PyQt4 snapshots now support Python v3. The build process is exactly the same - just use the right interpreter to run configure.py. pyuic4 has yet to be ported - but the code it generates should run under Python v3. pyrcc4 generates code for Python v2.6 and v3. If you need to generate code for earlier versions of Python use the new -py2 flag. Note that Python v2.6 can handle both formats. I'm still working through the examples - so far they have all run under Python v3 without any changes. That is excellent news. eric4's debugger will support Python3 in the first development snapshot as well. When will QScintilla's Python bindings be made Python3 compatible? It wouldn't surprise me if it just worked - though configure.py will need some changes. Phil ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] Larger size of QIcon?
Hi all, I have just started using pyqt4 and decided to make a small thumbnail-viewer to learn how things work. I would like the thumbnails to be displayed in a grid that automatically change the grid when resized so I use the QListWidget. So far so good - it works fine ...almost... the thumbnails (QIcons) are very small - how do I make them larger? Code is attached. Thanks! Mads #! /usr/bin/env python from PyQt4.QtGui import * from PyQt4.QtCore import * import sys TITLE = 'ThumbGridWidget' THUMBWIDTH = 64 PICS = ['Elvis1.jpg', 'Elvis2.jpg', 'Elvis3.jpg', 'Elvis4.jpg']*4 black = QColor(0, 0, 0) white = QColor(255, 255, 255) red = QColor(255, 0, 0) green = QColor(0, 255, 0) blue= QColor(0, 0, 255) yellow = QColor(255, 255, 0) cyan= QColor(0, 255, 255) magenta = QColor(255, 0, 255) class Thumb(QListWidgetItem): def __init__(self, parent=None, imgPath='', title=''): super(Thumb, self).__init__(parent) pic = QPixmap(imgPath) icon = QIcon(pic) self.setIcon(icon) self.setText(title) class ThumbListWidget(QListWidget): p = QPalette() def __init__(self, parent=None, palette=None): super(ThumbListWidget, self).__init__(parent) # Setup self.setViewMode(QListView.IconMode) self.setResizeMode(QListView.Adjust) self.setLayoutMode(QListView.SinglePass) self.setUniformItemSizes(1) self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff) # Colors if palette: self.p = palette self.setPalette(self.p) list = PICS for pic in list: thumb = Thumb(None, pic, pic) self.addItem(thumb) def setBackgroundColor(self, color): self.p.setColor(QPalette.Base, color) self.setPalette(self.p) def setTextColor(self, color): self.p.setColor(QPalette.Text, color) self.setPalette(self.p) class Main(QMainWindow): def __init__(self, parent=None): super(QMainWindow, self).__init__(parent) self.setWindowTitle(TITLE) self.listView = ThumbListWidget(self) self.listView.setBackgroundColor(black) self.listView.setTextColor(white) self.setCentralWidget(self.listView) if __name__ == __main__: print Starting.. app = QApplication(sys.argv) win = Main() win.show() app.exec_() ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Range slider?
On Mon Mar 23 02:02:51 GMT 2009, Hazen Babcock wrote: Does anyone know if a widget like this: http://www.codeproject.com/KB/miscctrl/CRangeSlider/CRangeSlider.gif exists for Qt? There's a range slider of sorts included in the package mentioned here: http://labs.trolltech.com/blogs/2009/03/23/embedded-widgets-source-code-released/ It's written in C++. I imagine it could be wrapped fairly easily with SIP or ported to Python. This being the slider in the upper left corner of the image which lets the user define a range or interval. If not, any suggestions on how to go about creating one? You might start by subclassing QAbstractSlider to inherit the API: http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qabstractslider.html Drawing the slider might be a challenge - you could keep things simple to start with and use simple drawing primitives, and later move on to use the QStyle drawing API: http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qstyle.html Handling mouse clicks and key events should be simple if you know enough about the event model. Some of the examples provided with PyQt (Scribble, Character Map) contain useful code that shows how to handle events, but the examples themselves don't really address the same use case. I'm currently using to two sliders that are coupled to each other, one to set the high value and the other to set the low value, but I think this would be a lot cooler... Yes, I agree. :-) David ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] QCoreApplication doesn't exit
I have a problem with QCoreApplication, my program doesn't return. this is the the code import sys from PyQt4.QtCore import QCoreApplication if __name__==__main__: app=QCoreApplication(sys.argv) sys.exit(app.exec_()) but this program doesn't exit and blocks all input in konsole, it just doesn't do anything and doesn't respond to keypresses. Am I doing something wrong? -- Thomas Coopman thomas.coop...@gmail.com ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QCoreApplication doesn't exit
On Wed, 25 Mar 2009 00:10:31 +0100, Thomas Coopman thomas.coop...@gmail.com wrote: I have a problem with QCoreApplication, my program doesn't return. this is the the code import sys from PyQt4.QtCore import QCoreApplication if __name__==__main__: app=QCoreApplication(sys.argv) sys.exit(app.exec_()) but this program doesn't exit and blocks all input in konsole, it just doesn't do anything and doesn't respond to keypresses. Am I doing something wrong? It's doing exactly what you have told it to do - sitting in the event loop waiting for events to process. Phil ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
