My first suggestion is to use Qt Designer to create your GUIs. Typing them out yourself sucks, takes more time, and you will definitely make more mistakes than Qt Designer. Here are some PyQt tutorials to help get you on the right track. The first one in the list is where you should start. A … Read more
The difficulty here is that the selected cells in the table may be non-contiguous and not in any particular order. So the task is to calculate the smallest rectangle that will include all the selected cells, and then create a data structure from that which is suitable for passing to a csv writer. Below is … Read more
I can give you an example of why such a thing: when you inherited a project and the original developer didn’t place the ui files in the repository (only left there the generated by pyuic4). True, that is a very particular example and that’s also my reason why I’m trying to find something (is not … Read more
The label gets updated all right, but the GUI isn’t redrawn before the end of your loop. Here’s what you can do about it: Move your long-running loop to a secondary thread, drawing the GUI is happening in the main thread. Call app.processEvents() in your loop. This gives Qt the chance to process events and … Read more
First, it’s a bad idea to directly edit the code created with QtDesigner. You may have seen the line # WARNING! All changes made in this file will be lost! at the top of the document. For such a simple widget, you’re better off with manual coding. Secondly, take a closer look at what the … Read more
Modify your center method to be as follows: def center(self): frameGm = self.frameGeometry() screen = QtGui.QApplication.desktop().screenNumber(QtGui.QApplication.desktop().cursor().pos()) centerPoint = QtGui.QApplication.desktop().screenGeometry(screen).center() frameGm.moveCenter(centerPoint) self.move(frameGm.topLeft()) This function is based on where the mouse point is located. It uses the screenNumber function to determine which screen the mouse is current active on. It then finds the screenGeometry of that monitor … Read more
Pyqtgraph only enables realtime plotting by being quick to draw new plot data. How to achieve realtime plotting is highly dependent on the details and control flow in your application. The most common ways are: Plot data within a loop that makes calls to QApplication.processEvents(). pw = pg.plot() while True: … pw.plot(x, y, clear=True) pg.QtGui.QApplication.processEvents() … Read more
The GUI is not updated/drawn until control is returned to the Qt event loop. The event loop runs in the main thread, and is what handles interactions with the GUI and coordinates the signals/slot system. When you call a Qt function in a slot like clickStop1(), the Qt call runs, but the GUI is not … Read more
The example crashes because the RenderPage class attempts to create a new QApplication and event-loop for every url it tries to load. Instead, only one QApplication should be created, and the QWebPage subclass should load a new url after each page has been processed, rather than using a for-loop. Here’s a re-write of the example … Read more
The window is disappearing because it goes out of scope at the end of your __init__ function. Since there are no further references to it, the python garbage collector removes it. Usually PyQt objects keep references to their children so this is not a problem. Since you want the widget to open in a separate … Read more