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How to set a Column list box to required.

My application should allow the users to select the required columns to proceed with further evaluation of the data. And I want to set the column list box status to required. But it is still displaying optional in the modal. How to set them to required.

 

Button box("X Column", colListX<<APPEND></APPEND>

And I even wanted to display an error msg when the required fields are not selected. Can "Isempty" function used to check whether column list box is empty or not.

Error = expr(New Window("JMP ALERT" , <<MODAL></MODAL>

Data Exploration and VisualizationWindowsRe: How to set a Column list box to required.

You need to use

    << set Min Items()

to set how many items are required for a given list

Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
New Window( "Col List Box Example",
 Col List Box( all, width( 250 ), maxSelected( 1 ) ),
 fontobj = lb = Col List Box()
);
lb << set Min Items(1);

Use the Scripting Index to find what messages can be passed to the Platforms, along with examples 

 

Re: How to set a Column list box to required.

Yeah, that worked. Thank you so much.

 

I have another doubt, how can we check whether ColListBox is empty? Can we use "IsEmpty" ? Could you help me with this.

Error = expr(New Window("JMP ALERT" , <<MODAL></MODAL>

Re: How to set a Column list box to required.

I typically check to see how many items are found after using the messsage

     << Get Items()

Here is an example from the Scripting Index that I did a slight modification to, to find the number of items returned from the Get Items message

Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
New Window( "Col List Box Example",
 Col List Box( all, width( 250 ), maxSelected( 1 ) ),
 fontobj = lb = Col List Box()
);
lb << Append( "height" );
nitems(lb << Get Items());

Re: How to set a Column list box to required.

Yeah, that worked. Thank you so much.