Polygon input from user through front panel in runtime

[Robin_507]

Hello!

I am trying to find a way to take a polygon as an input from the front panel. There are two parts to the problem, first is to take the 'hand-drawn' image from the user through the front panel and second is to convert it in a polygon. How can i do the first? I can't find any option in the graph/2Dpicture properties. 

Thanks!

[GerdW]

Hi Robin,

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@Robin_507 wrote:

I am trying to find a way to take a polygon as an input from the front panel. There are two parts to the problem, first is to take the 'hand-drawn' image from the user through the front panel and second is to convert it in a polygon. How can i do the first? I can't find any option in the graph/2Dpicture properties. 

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What have you tried so far? Where are you stuck?

When it is about graphs:

• They support cursors so you could use a cursor to have a user move and set it. You can read cursor properties all the time…
• You can always use an event structure to handle mouse movements/button actions for a certain control like a graph…

When it is about basic frontpanels: use the event structure to handle mouse movement/button events…

In the end you should know the coordinates of interest: what is the your problem to create a polygon from coordinates?

[Darin.K]

Here is an ancient example using an XY graph and cursors.  You click in the graph to add a new point and can drag the existing points around.

https://forums.ni.com/t5/LabVIEW/How-to-select-a-set-of-points-in-a-xy-graph-contained-in-an-area/m-...