Programming Guide - Actian

How You Can Create and Modify Fields DynamicallyThe presence of the frame status bar and its associated informational text canbe set in OpenROAD Workbench, or in the 4GL script of the frame. Thefollowing code is an example of how the status bar can be used when themouse is over a particular field:Begincurframe.hasstatusbar = true;curframe.statustext = 'Your mouse cursor is overthe form.';field(field0).mousemovetext = 'Your mouse cursoris over field0';endFor more information about how to use the frame status bar, see the attributesof the FrameSource, FrameExec, FormField, and MenuField classes in theLanguage Reference Guide online help.How You Can Create and Modify Fields DynamicallyThis section describes how to create and modify fields dynamically.How You Can Create Dynamic Simple FieldsDynamically creating simple fields (ShapeFields or ScalarFields) is a simplefour-step process:1. Declare a reference pointer to a field of the appropriate type.Unless you declare it with default null, the declaration creates an instanceof the object. The following code declares and instantiates a free trimobject called nextquarter:initialize ()=declarenextquarter = FreeTrim;labelstart = integer not null;linechart_subform = Subform;i = integer not null;name_array = array of StringObject;bfield = ButtonField;stack_field = StackField;efields = EntryField;colname = varchar(11) not null;dexp = DynExpr default null;enddeclare2. Create a new instance of the field if necessary.The following code creates a new free trim object called nextquarter:nextquarter = FreeTrim.Create();Creating Dynamic Frames 373