6 replies to this topic

[gdmjdkc]

I have used combo boxes in VIP before but always using data from a file.

Now I have a need to limit the input of the user to just a few select choices. I really did not want to create a file just for a few items. I would like to be able to populate the data from a list. I thought that I should be able to use a Selection Cycle (array), but have not been able to figure out just how it works. I havs searched the ProIV manuals but without success as to how to get the data into this Combo Box for selection.

Has anyone had any success with this before and if so how??

[Joseph Bove]

gdmjdkc,

There's probably a better answer, but...

You can load the appropriate selections into a temp (or work) file and then make the combobox based on that file.

hth,

Joseph

[calebsg]

You can load the appropriate selections into a temp (or work) file and then make the combobox based on that file.

That's old school...

Arrays are actually quite straightforward for comboboxes. Make your screen field in the combobox window something like $ARRAY(@PSEQ). Then just set the PG Array field on and specifiy the # of elements. I think that's all there is to it.

Caleb

[Papa Lazarou]

Yep, if you're using VIP then just add an editbox into the new "Selection Cycle (Array)" and give it a data source that's your scratch/file variable with @PSEQ as its array element. Then in the cycle definition, go to the "Paging" tab and specify the maximum number of elements in the "Array Size" field.

If the array doesn't contain a static set of data, you can avoid including blank entries in the combobox list by using the command

MAX-PAGE(#items)

in the Entry Logic of the SEL Cycle. This will overide the defined array-size, where #items is the number of items to display in the combobox.

HTH!

[Neil Hunter]

Just a FYI on the same subject.

If you want a range of numbers for your combobox, say 1 - 100. You can use @PSEQ as your field in the array and just limit the array size. This will probably save a couple of lines of coding to setup an array

[deepghosh]

I would use a memory file as I can share it for the whole application. Populate once and use it throughout the app.

[Donald Miller]

Extra info :

Pro IV support indicated that in the Combobox, the data selected is ALL sent across the network before any of it is displayed. The amount of data, the speed of the hardware and the network connection will all affect the speed at which the data can be shown. (For a Windows installation).

The original window function, with a partial selection available, was re-instated as it operated almost instantly, in comparison. The pro-isam file contains a few thousand entries.