In this article we will see how we can get the top-level changed signal of the QDockWidget. QDockWidget provides the concept of dock widgets, also know as tool palettes or utility windows. Dock windows are secondary windows placed in the dock widget area around the central widget in a QMainWindow(original window). This signal is emitted when the floating property changes. The topLevel parameter is true if the dock widget is now floating; otherwise, it is false.
In order to do this we will use topLevelChanged method with the dock widget object. Syntax : dock.topLevelChanged.connect(method) Argument : It takes method as argument Return : It returns None
Below is the implementation
Python3
# importing librariesfrom PyQt5.QtWidgets import *from PyQt5 import QtCore, QtGuifrom PyQt5.QtGui import *from PyQt5.QtCore import *import sysclass Window(QMainWindow): def __init__(self): super().__init__() # setting title self.setWindowTitle("Python ") # setting geometry self.setGeometry(100, 100, 500, 400) # calling method self.UiComponents() # showing all the widgets self.show() # method for components def UiComponents(self): # creating dock widget dock = QDockWidget(self) # setting title to the dock widget dock.setWindowTitle("GfG Dock") # push button push = QPushButton("Press", self) # setting widget to the dock dock.setWidget(push) # creating a label label = QLabel("neveropen", self) # setting geometry to the label label.setGeometry(100, 200, 300, 80) # making label multi line label.setWordWrap(True) # setting geometry tot he dock widget dock.setGeometry(100, 0, 200, 30) # getting top level changed signal # setting text to the label dock.topLevelChanged.connect(lambda: label.setText("Top level Changed Signal Emitted"))# create pyqt5 appApp = QApplication(sys.argv)# create the instance of our Windowwindow = Window()# start the appsys.exit(App.exec()) |
Output :
