This is not too difficult to do using the built in capabilities of QGraphicsView. The demo script below has left-button panning and wheel zoom (including anchoring to the current cursor position). The fitInView method has been reimplemented because the built in version adds a weird fixed margin that can’t be removed. PyQt4 version: from PyQt4 … Read more
Usually in pyqtgraph when dealing with custom axis strings people subclass AxisItem and override tickStrings with the strings they want displayed. See e.g. pyqtgraph : how to plot time series (date and time on the x axis)? Pyqtgraphs axisitem also has a built in setTicks that allows you to specify the ticks that are going … Read more
Add the the PyQt4 directory containing Qt’s applications and DLLs to your PATH environment variable. In PowerShell, provided you didn’t change any of your install paths, that’d be $env:path += ‘;C:\Python26\Lib\site-packages\PyQt4\bin’
This allows you to use custom widgets defined elsewhere, which designer otherwise wouldn’t know about. For example, if you’ve defined a widget MyLabel derived from QLabel, then you can define it here and then just insert a QLabel as placeholder in your ui and promote it to MyLabel. The uic compiler will then include the … Read more
Yep, it is possible. If I use setup(console=[‘__main__.py’], options={“py2exe”:{“includes”:[“sip”]}}) It creates a console app, however if I use setup(windows=[‘__main__.py’], options={“py2exe”:{“includes”:[“sip”]}}) it does not show console on .exe file. But output is dumped on main.exe.log file in the .exe folder. Be careful.
This line of code: item = QTableWidgetItem(scraped_age).setTextAlignment(Qt.AlignHCenter) will not work properly, because it throws away the item it creates before assigning it to the variable. The variable will in fact be set to None, which is the return value of setTextAlignment(). Instead, you must do this: item = QTableWidgetItem(scraped_age) # create the item item.setTextAlignment(Qt.AlignHCenter) # … Read more
The safest way to clear a layout is to extract the items with its takeAt method, and then explicitly delete any widgets with deleteLater: def clearLayout(self, layout): if layout is not None: while layout.count(): item = layout.takeAt(0) widget = item.widget() if widget is not None: widget.deleteLater() else: self.clearLayout(item.layout())
The output consoles produced by Python are written to the program output streams sys.stdout (normal output) and sys.stderr (error output, such as exception tracebacks). In this case we will use stdout class Stream(QtCore.QObject): newText = QtCore.pyqtSignal(str) def write(self, text): self.newText.emit(str(text)) class Window(QtGui.QMainWindow): def __init__(self): super(Window, self).__init__() self.setGeometry(50, 50, 500, 300) self.setWindowTitle(“PyQT tuts!”) self.setWindowIcon(QtGui.QIcon(‘pythonlogo.png’)) self.home() sys.stdout … Read more
Override the closeEvent method of QWidget in your main window. For example: class MainWindow(QWidget): # or QMainWindow … def closeEvent(self, event): # do stuff if can_exit: event.accept() # let the window close else: event.ignore() Another possibility is to use the QApplication‘s aboutToQuit signal like this: app = QApplication(sys.argv) app.aboutToQuit.connect(myExitHandler) # myExitHandler is a callable
It should be enough to create an empty virtualenv and then copy the contents of the …/site-packages/PyQt4 directories into it. I suggest to install PyQt4 once globally, make a copy of the directory, uninstall it and then use this trick to create VEs.