portal.rowCount ( _name )

Calculate number of visible portal rows.

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Arnold Kegebein
Arnold Kegebein
http://www.kegebein.net

Sample input:

portal.rowCount ( "myPortal" )

Sample output:

10 (if the portal "myPortal" has 10 portal rows visible)

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/*
Name: 	portal.rowCount
Param: 	_name	(text) Portal object name
Return:	(list)
--------------------------------------------------------------------------------
Author:	Arnold Kegebein
Version:	1.0, Aug-2010
--------------------------------------------------------------------------------
Counts visible lines in a portal.
The function requires an object name for the portal and at least one other object with name
inside the portal.
--------------------------------------------------------------------------------
*/

Let( [
	_objects = GetLayoutObjectAttribute( _name;  "containedObjects" );
	_objects = Substitute( "¨" & _objects & "¨"; ["<"; ""]; [">"; ""]; [¶; "¶¨"]; ["¨¶"; ""]; ["¶¨"; ¶]; ["¶¨"; ""]; ["¨"; ""] );
	_object = GetValue( _objects; 1 );
	_portal.height = GetLayoutObjectAttribute( _name;  "bottom" ) - GetLayoutObjectAttribute( _name;  "top" );
	_row.height = GetLayoutObjectAttribute( _object;  "top"; ""; 2 ) - GetLayoutObjectAttribute( _object;  "top"; ""; 1 )
];
	Round( _portal.height / _row.height; 0 )	
)

Calculates the total number of visible portal rows (not the number of records shown in these rows).
The parameter _name for this function is the object name of the portal.

Besides the object name for the portal, at least one object in the portal has to have an object name, too.

If the portal object name is unknown, nothing is returned.
If no object inside the portal has an object name, a question mark (?) is returned.

I was inspired by Fabrice Nordmann's function VisiblePortalRows. My cf returns only the row number count, not the visible values from the portal. Advantage: It does not use recursion (faster) and requires only one function parameter.

See also my function portal.firstVisibleRow to get the index of the first visible portal row.

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Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

portal.rowCount ( _name )

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