[PyQt] QGraphicsScene/Item/View optimisation
Hello, I draw some items (mainly rectangles or ellispes) on a scene, and it seems to take a lot of resources, even with a few objects (say 10). The main issue is on the maemo plateform, as Nokia N8x0 devices are not that powerfull. Just drawing the initial scene takes a few seconds. Are there some optimisation tips I should know? Or is there a big issue in my design? The code is here: http://trac.gbiloba.org/papywizard/browser/trunk/papywizard/view/shootingScene.py http://trac.gbiloba.org/papywizard/browser/trunk/papywizard/view/pictureItem.py Thanks, -- Frédéric ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] import ui_rc
2009/2/4, Yusuf X ys1...@gmail.com: I have one question: when I run pyuic4 on a .ui file that has a QMainWindow, it adds import ui_rc at the end of the resultant .py file. Then when I use that .py file, I get ImportError: No module named ui_rc. If I delete that last line by hand, the .py works fine and I can display the window as needed. Probably you are using a resources file (for example for icons). You can resolve the issue by creating the resource file in this way: pyrrc4 file_name.rc ui_rc.py HTH, Simone ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] import ui_rc
On Tue, 3 Feb 2009 22:52:09 -0800, Yusuf X ys1...@gmail.com wrote: Hello, first of all thanks for making PyQT. I have one question: when I run pyuic4 on a .ui file that has a QMainWindow, it adds import ui_rc at the end of the resultant .py file. Then when I use that .py file, I get ImportError: No module named ui_rc. If I delete that last line by hand, the .py works fine and I can display the window as needed. See http://www.riverbankcomputing.com/support/help So what's with the extraneous ui_rc? I'm using Qt4.5, Python2.6 and PyQt4 on Windows Vista. FWIW, I have no such issues with QDialog. Qt 4.5 isn't yet supported. Phil ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] Worker Thread
It seems like your worker thread should start, I don't really like how you've set it up, but I think it should start, so I am going to suggest that pow is too much for it. Ie it is taking all of the resources your application gets. Really what you should do in that case is use multiprocessing. Plus 'terminate()' is not going to do what you want. So maybe you should use multiprocessing. I don't have multiprocessing installed, yet, but create a thread and then when you use .start() have your thread start a process. This will give you access to terminate, which will be like hitting ctrl-c http://docs.python.org/library/multiprocessing.html And there is a version of multiprocessing for 2.5 if you are running that. mbs ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Newbie with a circular problem calling problem
In order to prevent similar situations in the my code where I have a set of dependent boxes I've used a couple of methods. First method is to use a governor function. Send all of your signals to one function which can evaluate each signal as it's called and decide to act on or ignore subsequent signals. From here you can set status flags and call your worker methods. When the signals are triggered again, because of your status flags you know to ignore them. Second method is to disconnect the widgets that you're currently working on and them re-connect them when you're done. This way probably works better as it decrease the amount of events flying around. It becomes an issue not just when updating widgets, but clearing them as well sometimes, depending on which signal you use. I have functions which I can call that does mass connects and disconnects. There may be better methods for handling this in Qt, but I've found these to work. Marc On Tue, Feb 3, 2009 at 11:28 AM, Knapp magick.c...@gmail.com wrote: Hello, I am a bit new to all this, so I hope this question is not to dumb. I am writing a program that must have a form with just these inputs and one input effects the other. I have one spin box, ST(strength) that sets the base of the second, HP (hit points). So if you have 10 ST then you have 10 HP but you can buy more HP by rolling the roller for ST. This is where it gets really messed up! Changing ST must update ST and HP. Calling HP must update only HP. I know this explanation sucks but hopefully the code will help. I am using count to try and stop the run away look that is happening. Is there a much better way?! BTW, ST cost one price and HP a second so changes from both rollers must be kept separately be be shown added. Thanks all! Douglas E import sys from PyQt4 import * #QtCore, QtGui from Char1 import * class StartQT4(QtGui.QMainWindow): count=0 dHP = 0 oldHP = 10 dST = 0 oldST = 10 def __init__(self, parent=None): QtGui.QWidget.__init__(self, parent) self.ui = Ui_MainWindow() self.ui.setupUi(self) QtCore.QObject.connect(self.ui.spinBox_DX, QtCore.SIGNAL(valueChanged(int)), self.label_DX_Cost_Set) QtCore.QObject.connect(self.ui.spinBox_ST, QtCore.SIGNAL(valueChanged(int)), self.label_ST_Cost_Set) QtCore.QObject.connect(self.ui.spinBox_HP, QtCore.SIGNAL(valueChanged(int)), self.adjust_HP) # QtCore.QObject.connect(self.ui.spinBox_ST,QtCore.SIGNAL(valueChanged(int)), self.lineEdit_Basic_Lift_s) def label_DX_Cost_Set(self, Num): Num1= Num - self.dx self.dx = Num self.ui.label_DX_Cost.setNum(Num1) def label_ST_Cost_Set(self, Num): self.dST = Num - self.oldST self.oldST = Num self.ui.label_ST_Cost.setNum((Num-10)*20) self.ui.lineEdit_Basic_Lift.setText(str(Num*Num/5)) #val = self.ui.spinBox_HP.value() #self.ui.spinBox_HP.setValue(0) self.adjust_HP(-99) def adjust_HP(self, Num): print Num, Count, Num, self.count if Num==-99 : self.ui.spinBox_HP.setValue(self.oldHP+self.dST) print 99 ds, oldHP, self.dST, self.oldHP self.oldHP += self.dST elif self.count == 0 : self.count += 1 self.dHP = Num - self.oldHP print ds, oldHP, self.dST, self.oldHP self.oldHP = Num self.ui.label_HP_Cost.setNum(Num+self.oldHP) self.ui.spinBox_HP.setValue(self.oldHP+self.dHP) else : self.count = 0 print end if __name__ == __main__: app = QtGui.QApplication(sys.argv) myapp = StartQT4() myapp.show() sys.exit(app.exec_()) -- Douglas E Knapp Amazon Gift Cards; let them choose!! http://www.amazon.com/gp/product/B001078FFE?ie=UTF8tag=seattlebujinkandlinkCode=as2camp=1789creative=9325creativeASIN=B001078FFE ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Linking Qt statically into a project using embedded Python and Sip/PyQt
George Goussard wrote: Hello. My project that I am currently working on is a cross-platform C++ project. On Linux 32-bit/64-bit I have the constraint that I MUST link Qt (4.3.3) in statically with the project. This is a given and cannot be compromised. I have successfully embedded Python into our application and with this facility I can run external Python *.py files. With the help of Sip/PyQt used in these *.py files I can route the output to a nice window inside my Qt application etc. etc. But,the problem is that it only works if I link Qt in dynamically to my application. The reason(I think – when I link dynamically to Qt) is because my application loads the Qt *.so file dynamically when I startup the application. Then when the application runs an external *.py file and it has the line “from PyQt import QtCore” then I suppose that it sees the *.so is already loaded and uses it. Now my question: How can I either get the Python mechanism or Sip/PyQt to rather use the statically linked in Qt with my project? Currently, if I link Qt statically into my application and run the *.py files I get some strange Qt message on the command line and then it crashes. George. The only way to do this, is to have everything statically linked: - Build a static Python library - Build a static SIP library - Build static PyQt libraries Use PyImport_ExtendInittab() to declare the module initialization functions for SIP and all PyQt modules you need in your application. This must be done before you initialize the python interpreter with Py_Initialize(). Ulli ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] Newbie with a circular problem calling problem
Have you noticed that QLineEdit emits a signal textEdited which is not emitted when the text is changed with setText. http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qlineedit.html#textEdited and spin boxes emit the following http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qabstractspinbox.html#editingFinished so that might not happen if you set the value programmaticaly. ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Linking Qt statically into a project using embedded Python and Sip/PyQt
On 2/4/2009 4:42 PM, Ulrich Berning wrote: George Goussard wrote: Hello. My project that I am currently working on is a cross-platform C++ project. On Linux 32-bit/64-bit I have the constraint that I MUST link Qt (4.3.3) in statically with the project. This is a given and cannot be compromised. I have successfully embedded Python into our application and with this facility I can run external Python *.py files. With the help of Sip/PyQt used in these *.py files I can route the output to a nice window inside my Qt application etc. etc. But,the problem is that it only works if I link Qt in dynamically to my application. The reason(I think – when I link dynamically to Qt) is because my application loads the Qt *.so file dynamically when I startup the application. Then when the application runs an external *.py file and it has the line “from PyQt import QtCore” then I suppose that it sees the *.so is already loaded and uses it. Now my question: How can I either get the Python mechanism or Sip/PyQt to rather use the statically linked in Qt with my project? Currently, if I link Qt statically into my application and run the *.py files I get some strange Qt message on the command line and then it crashes. George. The only way to do this, is to have everything statically linked: - Build a static Python library - Build a static SIP library - Build static PyQt libraries Use PyImport_ExtendInittab() to declare the module initialization functions for SIP and all PyQt modules you need in your application. This must be done before you initialize the python interpreter with Py_Initialize(). It should also work if you recompile a single dynamic library (python.so) with PyQt and SIP included within as builting modules. -- Giovanni Bajo Develer S.r.l. http://www.develer.com ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] Slow loading times of PyQt .exe with Pyinstaller
Hello, I've compiled a relatively simple GUI application with PyQt into an .exe with Pyinstaller. The loading time of this .exe is very long (7-8 seconds). When I compile it with py2exe instead (which seems to work great except that one has to remember adding 'sip' as an explicit depenency), the loading time is only 1-2 seconds. The executable is a bit larger (10 MB instead of 9 MB with Pyinstaller). Has anyone had similar experiences? Am I configuring Pyinstaller wrong? Eli -- View this message in context: http://www.nabble.com/Slow-loading-times-of-PyQt-.exe-with-Pyinstaller-tp21836942p21836942.html Sent from the PyQt mailing list archive at Nabble.com. ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Newbie with a circular problem calling problem
Here is what is meant by programatically change. And this is what I mean by using the signals. I don't know what widgets your actually using, but if you can't find signals that are only emitted when you want, then you'll have have to hand the signals differently. (I beleive there has been some other suggestions.) As a final option you could change the event handlers. mbs On Wed, 2009-02-04 at 21:11 +0100, Knapp wrote: On Wed, Feb 4, 2009 at 5:40 PM, Matt Smith mel...@orangepalantir.org wrote: Have you noticed that QLineEdit emits a signal textEdited which is not emitted when the text is changed with setText. http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qlineedit.html#textEdited and spin boxes emit the following http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qabstractspinbox.html#editingFinished so that might not happen if you set the value programmaticaly. Thanks very much for the help. I don't fully understand though. What do you mean by programmatically and which value do you mean? I am very new to all this. #!/usr/bin/env python test program from PyQt4 import QtGui,QtCore class TestWidget(QtGui.QWidget): def __init__(self,parent=None): QtGui.QWidget.__init__(self,parent) layout = QtGui.QVBoxLayout() self.labelA = QtGui.QLineEdit(self) self.labelB = QtGui.QSpinBox(self) self.connect(self.labelB,QtCore.SIGNAL(editingFinished()),self.programaticallyChangeA) self.connect(self.labelA,QtCore.SIGNAL(textChanged( QString )),self.programaticallyChangeB) layout.addWidget(self.labelA) layout.addWidget(self.labelB) self.setLayout(layout) def programaticallyChangeB(self,text): try: self.labelB.setValue(int(text)) except: pass def programaticallyChangeA(self): try: self.labelA.setText(str(self.labelB.value())) except: pass app = QtGui.QApplication([]) widge = TestWidget() widge.show() app.exec_() ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] defining QlistViewitem in python
hello folks
i have this problems in my codes. i am try to link qfiledailoug with
qlistviewitem so that whenever i chose a file it would be loaded in
qlistview item using this function
self.item.append(QlistViewitem(self.tree, 'filename'))
but whenever i try that it gives me an attribute error so, how can i define
qlistviewitem in the following codes.
import sys
import shutil
from test import Ui_MainWindow as UIMW
from PyQt4 import QtCore, QtGui
import urllib2 as ulib
#import QFileDialog.py
#from PyQt4 import QtGui
#from PyQt4 import QtCore
class MyWindow(QtGui.QMainWindow, UIMW):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.setupUi(self)
self.__setupConnections()
def __setupConnections(self):
self.connect(self.addphoto, QtCore.SIGNAL(clicked())
,self._addphotoClicked)
self.connect(self.addphotoandtag, QtCore.SIGNAL(clicked())
,self._addphotoandtagClicked)
self.connect(self.removephoto, QtCore.SIGNAL(clicked())
,self._removephotoClicked)
self.connect(self.searchphoto, QtCore.SIGNAL(clicked() )
,self._searchphotoClicked)
self.connect(self.cancel, QtCore.SIGNAL(clicked()),
self._cancelClicked)
self.connect(self.actionImport_Photos,
QtCore.SIGNAL(triggered())
self._actionImport_Photos)
self.connect(self.actionExit, QtCore.SIGNAL(triggered()),
self._actionExit)
self.connect(self.listView, QtCore.SIGNAL(triggered()),
self._listView)
def _addphotoClicked(self):
shutil.copytree('/home/waseem/My Pictures/yemen 2008/2008/1',
'/home/waseem/test')
def _addphotoandtagClicked(self):
pass
def _searchphotoClicked(self):
pass
def _removephotoClicked(self):
pass
def _FinishClicked(self):
pass
def _cancelClicked(self):
pass
def _actionImport_Photos(self):
filename = QtGui.QFileDialog.getOpenFileName(self, 'Import Photo',
'/home/')#, tr('Images (*.png *.xpm *.jpg)'));
#self.items=[]
self.item.append(QlistViewitem(self.tree, 'filename'))
# file=open(filename)
#data = file.read()
#print data
#self.photosdisplay.read(data)
def _actionExit(self):
pass
def _listView(self):
pass
#class Import_Photos(QtGui.QMainWindow, UIMW):
if __name__==__main__:
app=QtGui.QApplication(sys.argv)
w=MyWindow()
w.show()
sys.exit(app.exec_())
--
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[PyQt] item delegates
Hi, Suppose I have a TableView. Then I can set itemdelegates for a column, a row or the entire view using the respective methods void setItemDelegateForColumn ( int column, QAbstractItemDelegate * delegate ) void setItemDelegateForRow ( int row, QAbstractItemDelegate * delegate ) void setItemDelegate ( QAbstractItemDelegate * delegate ) All this is fine. But how do I specify a delegate for a single cell in the table? Mads ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
