Prevent emscripten_webgl_destroy_context from removing event handlers

The JavaScript implementation of that function has
the following code:

  if (typeof JSEvents === 'object')
    JSEvents.removeAllHandlersOnTarget(GL.contexts[contextHandle].GLctx.canvas); // Release all
    // JS event handlers on the DOM element that the GL context is associated with since the context
    // is now deleted.

This breaks mouse/keyboard events, etc.

Disable this logic by temporarily setting the JSEvents object
to undefined, for the duration of the emscripten_webgl_destroy_context
call.

Fixes: QTBUG-74850
Change-Id: Ied3177b0ca6e63e8ea07143bf7d6a850b0bce35a
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>

0 files changed, 0 insertions, 0 deletions