Programmaticaly change type defs

Hello

I would like to change by programming a (strict) type def. I tried to open a reference to the .ctl, but that doesn't seem to work for VI.

In the specific application, I try to ensure that the user can edit the items in a ring that is used throughout the entire show.

Thanks for your time and good luck for 2013,

Bert Hannon

I would like to change by programming a (strict) type def.

-By definition, you can't do that. This is the compiler that handles the connection between an instance of a control and the CTL TYPEDEF file.

Do you this in an executable, there is no available compiler and your code will fail.

a user must be able to modify the elements of a ring which is used throughout the entire program.

-One solution is to call a Subvi, which accounts for the current list of available items and attach this list to the STRINGS of all the rings] property.  Perform this operation when the window containing the Doi appears, and whenever conditions change the list.

-Another solution that saves the memory must not store the list in control at all.  I have a project with the channel selector switches of 2800 on a Panel, each with 200 + names channel.  To save memory, I treat it like this:

... The control stores only the currently selected value (for example, the STRING [] array has only one entry).

... When a MOUSE down? even happens, I change the property to be a complete list of channels, then let the menu to proceed.

... In a VALUE CHANGE event, I put the [STRINGS] property to the single selected element (removal of the large list).

In this case, you don't need to say the ring what values are avaiable, except right when clicked.

-Another solution is to pass references to the Doi to a Subvi, which attaches the STRINGS [] which are valid at the present time.

Tags: NI Software

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