GridData controls display 2-dimensional data array as a grid of rows and columns with an optional label. They are associated to an underlying GridData or GridData parameter.
You create them using the PPGLayout.AddItem or PPGLayout::AddItem method with the siControlGrid control type enum:
// ** during parameter definition (for example, in the Define callback) **
// use the convenience method to add the grid to the custom property
var oParam = oPSet.AddGridParameter( "MyGrid" );
// now to get the actual grid from the parameter, use [Get]Value (not [Get]Source)
var oGrid = oParam.Value;
oGrid.BeginEdit();
oGrid.RowCount = 4;
oGrid.ColumnCount = 4;
oGrid.SetRowValues( 0, new Array(0, 0.5, 0.75, 0.1) );
oGrid.SetRowValues( 1, new Array(0.1, 0.5, 0.75, 0.1) );
oGrid.SetRowValues( 2, new Array(0.2, 0.99, 0.75, 0.1) );
oGrid.SetRowValues( 3, new Array(0.3, 0.5, 0.75, 0.1) );
var aCols = new Array( "R", "G", "B", "A" );
for ( var i=0; i<4; i++ ) {
oGrid.SetRowLabel( i, "Vertex "+i );
oGrid.SetColumnLabel( i, aCols[i] );
}
oGrid.EndEdit();
// ** during control creation (for example, in the DefineLayout callback) **
// no convenience method for the grid control
oLayout.AddItem( "MyGrid", "", siControlGrid );//oItem.SetAttribute(siDecimals, 0 );The underlying GridData or GridData parameter is a real instance of a GridData or GridData object, so that all methods and properties available on the GridData or GridData object are available dynamically through Logic, using Parameter.Value (from PPG.Inspected), which returns a ProjectItemCollection which you use in turn to get the particular item's parameter) to get a pointer to the GridData or GridData object (see Dynamically Changing Custom Properties).
To get a sense of working with grid controls, check out the examples in the documentation for the GridData or GridData object.