Use joystick to control a graphic

[dirtyb15]

Okay, I really need some help here. I need to use a joystick to control an X on the front panel. Basically i have a box on the front panel and Will have a crosshare or x centered in that box. I need to use a joystick to move that crosshare anywhere in the box, and know what the coordinates of that x are. Anyone have any suggestions?
Thanks,

[ryank]

The input devices palette contains a VI you can use to get the axis position of the joystick. Once you have the axis position, you can do some simple grapical programming to display your X on a picture control. If the built in VIs don't work for you, you can write your own by making calls to the windows API. There are lots of examples on using joysticks with LV, using both the built in VIs and API calls, here are a few:

32 button joystick vi with 6 axis control
JoystickData.vi
Motion Control with USB Joystick
Reading a Joystick's Status

Regards,
Ryan K.

[dirtyb15]

Thank you for the reply. The first example you have listed is mine actually 🙂 I am comfortable with the joystick part of this, I just dont know how to integrate graphics into labview. I will look at these other examples and see if i can figure something out. Any help with api's or other methods would be greatly appreciated. Thanks,
Dave

[ryank]

Good deal, you've already got the tricky part then. Displaying the crosshair in a picture control just requires
some simple graphical programming (although I used a circle instead of a crosshair because I'm lazy). I've attached a quick example, I haven't tested it with a joystick since I don't have one, but as long as you can get the x and y axis values from your joystick and you know the maximum possible value for them, you should be able to plug it right in. Let me know if you have any questions.

Ryan K.

[dirtyb15]

great, let me give this a shot, ill let you know,
Dave

[dirtyb15]

Dont have 7.1 yet, I have 7. Any way you can save the vi as an older version for me? Thanks,
Dave

[ryank]

Try this one.

Ryan

[dirtyb15]

That is just what i needed. Thank you very much for your help.