Coming together nicely - code example!
// Opacity is defined as an Expression in the Symbology Encoding Specification
IExpressionViewer opacityViewer = new CQLExpressionViewer( composite,
SWT.DEFAULT ); ExpressionInput opacity = new ExpressionInput();
opacity.setRequired(false); opacity.setBinding( Float.class ); opacity.setMin(
0.0 ); opacity.setMax( 1.0 ); opacity.setDefault( 1.0 ); // used to suggest
literal values opacity.setLiteralList( 0.0, 0.25, 0.5, 0.75, 0.8, 0.85, 0.90,
0.95, 1.0 ); // used to suggest numeric attributes opacity.setSchema(
featureType ); opacityViewer.setInput( opacity ); // Acts as a normal viewer
with the selection being the edited Expression opacityViewer.setSelection( new
StructuredSelection( expr ) ); opacityViewer.setExpression( expr ); // direct
access via helper method
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