Home/ Questions/Q 7819513
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-02T06:58:57+00:00

I’m using QT4 and I created a QGLWidget in which I want to implement

  • 0

I’m using QT4 and I created a QGLWidget in which I want to implement a right-click context menu. I want the context menu to appear only when the right-mouse button is clicked and the CTRL key is pressed down.

I tried implementing this by setting a control flag when the CTRL key is pressed, and then clearing it when the CTRL key is released (via a keyReleaseEvent). The problem is that I don’t receive a keyReleaseEvent when the context menu is up (not just CTRL, no key release at all).

For example: I hold down CTRL, click the right mouse button, and then the context menu appears (still holding CTRL). Without selecting anything in the menu, I release the CTRL key, but my program does not receive a keyPressEvent. Therefore my flag never gets cleared, and the next time the user right clicks (even without holding control) the context menu will appear.

Why don’t I receive a keyPressEvent when a context menu is present?

I’m using QT 4.8 (C++) and tested this on both Windows and Linux with the same result.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    For the why part, Qt sends key events to the widget which has keyboard focus or is explicitly grabbing the keyboard (with QWidget::grabKeyBoard()), since the context menu is that widget at the time you release the key, it receives the key release event.

    • 0