Runtime: work around 1s delay added when using twisted reactor's callLater.
Since wxPython4, using wxReactor from non-main thread was producing
exceptions in wxWidget's C++ code. Then reactor.run() was called from
main thread, and runtime's worker was delegating calls to reactor
with callLater(0, callable).
While this worked perfectly with wxReactor, it did introduce an unexplained
1 second delay to each worker call when using nomal linux reactors
(i.e. without wxPython). As a workaround reactor runs in a thread when using
twisted without wxPython
// widget_tooglebutton.ysl2
widget_desc("ToggleButton") {
longdesc
||
Button widget takes one boolean variable path, and reflect current true
or false value by showing "active" or "inactive" labeled element
respectively. Clicking or touching button toggles variable.
||
shortdesc > Toggle button reflecting given boolean variable
path name="value" accepts="HMI_BOOL" > Boolean variable
}
widget_class("ToggleButton") {
||
frequency = 5;
active_style = undefined;
inactive_style = undefined;
dispatch(value) {
this.activity_state = Boolean(value);
//redraw toggle button
this.request_animate();
}
on_click(evt) {
//toggle state and apply
this.activity_state = this.activity_state ? false : true;
this.apply_hmi_value(0, this.activity_state);
//redraw toggle button
this.request_animate();
}
init() {
this.element.onclick = (evt) => this.on_click(evt);
this.activity_state = undefined;
}
||
}
widget_defs("ToggleButton") {
activable();
}