GPIO control

How can I set a GPIO output with a QTvcp button or check box? (I'm using a modified version of QTaxis with qtdesigner)
For instance in .hal I have "hm2_5i25.0.gpio.025.is_output TRUE" and the pin is wired to a power relay but I can't find a way to set it.

If you select the Linuxcnc Pushbutton widget in designer, qtvcp makes a HAL pin for it that you then connect to your gpio in the post_gui.hal file.
This is not QPushbutton but Pushbutton under the Linuxcnc section. For example, in Qtdragon, I have buttons to turn on relays for a water pump and laser crosshair. The commands in qtdragon_postgui.hal are:Of course, you need to make adjustments for the names to suit your 5i25 board.
Jim

Thanks persei8, I did try adding Linuxcnc pushbutton but I didn't connect it in the postgui.hal file. I'll give that a shot as soon as I have time.

Jim's suggestion is the most user friendly if you later need to change the pin name, but you can also use the pushbutton to call a function in the handler file or call a python command directly. Either of those could use HAL python module to set pins/params.

in a handler file:
self.h.hal.set_p("pinname","10")

in designer button python command:
HAL.set_p('motion.probe-input','1')

Thanks persei8, works like a charm. I didn't realize that:
1. pin names in the button widget are created a startup
2. the new pins must be prefixed by the gui name (<name>.ui) when referenced in
postgui.hal (but not when referenced by other QT widgets)

I didn't see this in the documentation.
Problem solved.