PyQtGraph - Checking if Image View has Focus

PyQtGraph - Checking if Image View has Focus

To check if an ImageView widget (or any widget for that matter) in PyQtGraph has focus, you can use the hasFocus() method. This method returns True if the widget currently has focus, and False otherwise.

Here's a simple example using PyQtGraph's ImageView:

import sys import numpy as np import pyqtgraph as pg from PyQt5.QtWidgets import QApplication, QPushButton, QVBoxLayout, QWidget class App(QWidget): def __init__(self): super().__init__() self.setWindowTitle('PyQtGraph ImageView Focus Checker') layout = QVBoxLayout() # Sample data for the ImageView data = np.random.rand(100, 100) self.imageView = pg.ImageView() self.imageView.setImage(data) btn_check_focus = QPushButton("Check ImageView Focus") btn_check_focus.clicked.connect(self.check_focus) layout.addWidget(self.imageView) layout.addWidget(btn_check_focus) self.setLayout(layout) def check_focus(self): if self.imageView.hasFocus(): print("ImageView has focus.") else: print("ImageView does not have focus.") if __name__ == '__main__': app = QApplication(sys.argv) ex = App() ex.show() sys.exit(app.exec_())

In this code, we've set up a simple PyQtGraph ImageView along with a QPushButton. When the button is clicked, the check_focus method is called, which checks if the ImageView has focus and prints an appropriate message.

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