![]() Save ui and Build and Python code from ui file as shown in the below code − The Signal/Slot Editor window at bottom right will show the result − Then highlight the button with mouse and drag the cursor towards the textboxĪs the mouse is released, a dialog showing signals of button and methods of slot will be displayed. To start with, choose Edit signals/slots from Edit menu (or press F4). Hence, the button’s clicked signal is to be connected to clear() method of the text box. The QLineEdit widget has a clear() method for this purpose. It is desired that if button is pressed, contents of text box should be erased. ![]() Using Qt Designer's Signal/Slot Editorįirst design a simple form with a LineEdit control and a PushButton. The slot can be any callable Python function. The signal on its own does not perform any action. Each PyQt widget, which is derived from QObject class, is designed to emit ‘signal’ in response to one or more events. Widgets used to build the GUI interface act as the source of such events. Functions or methods are executed in response to user’s actions like clicking on a button, selecting an item from a collection or a mouse click etc., called events. ![]() Unlike a console mode application, which is executed in a sequential manner, a GUI based application is event driven.
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