Example usage for org.eclipse.jface.viewers ComboViewer ComboViewer

Introduction

In this page you can find the example usage for org.eclipse.jface.viewers ComboViewer ComboViewer.

Prototype

public ComboViewer(Composite parent, int style)

Source Link

Document

Creates a combo viewer on a newly-created combo control under the given parent.

Usage

From source file:org.bonitasoft.studio.expression.editor.operation.OperatorSelectionDialog.java

License:Open Source License

@Override
protected Control createDialogArea(Composite parent) {
    final Composite mainComposite = new Composite(parent, SWT.NONE);
    mainComposite/*from   ww  w. j  ava2 s.  c o m*/
            .setLayoutData(GridDataFactory.fillDefaults().grab(true, true).hint(300, SWT.DEFAULT).create());
    mainComposite.setLayout(GridLayoutFactory.fillDefaults().numColumns(2).margins(10, 10).create());
    final Label operatorType = new Label(mainComposite, SWT.NONE);
    operatorType.setText(Messages.operatorType);

    final ComboViewer operatorViewer = new ComboViewer(mainComposite, SWT.READ_ONLY | SWT.BORDER);
    operatorViewer.getCombo().setLayoutData(GridDataFactory.fillDefaults().grab(true, false).create());

    operatorViewer.setContentProvider(new ArrayContentProvider());
    operatorViewer.setLabelProvider(new OperatorLabelProvider());
    operatorViewer.addFilter(new ViewerFilter() {

        @Override
        public boolean select(Viewer viewer, Object parentElement, Object element) {
            Expression exp = operation.getLeftOperand();
            if (exp != null && !exp.getReferencedElements().isEmpty()
                    && ExpressionConstants.VARIABLE_TYPE.equals(exp.getType())) {
                EObject data = exp.getReferencedElements().get(0);
                if (data instanceof BusinessObjectData) {
                    return element.equals(ExpressionConstants.CREATE_BUSINESS_DATA_OPERATOR)
                            || element.equals(ExpressionConstants.JAVA_METHOD_OPERATOR);
                } else if (data instanceof JavaObjectData) {
                    return element.equals(ExpressionConstants.ASSIGNMENT_OPERATOR)
                            || element.equals(ExpressionConstants.JAVA_METHOD_OPERATOR);
                } else if (data instanceof XMLData) {
                    return element.equals(ExpressionConstants.ASSIGNMENT_OPERATOR)
                            || element.equals(ExpressionConstants.XPATH_UPDATE_OPERATOR);
                } else {
                    return element.equals(ExpressionConstants.ASSIGNMENT_OPERATOR);
                }
            } else if (exp != null && !exp.getReferencedElements().isEmpty()
                    && ExpressionConstants.DOCUMENT_REF_TYPE.equals(exp.getType())) {
                return element.equals(ExpressionConstants.SET_DOCUMENT_OPERATOR);
            }
            return element.equals(ExpressionConstants.ASSIGNMENT_OPERATOR);
        }
    });

    operatorViewer.setInput(operatorTypeList);

    section = new Section(mainComposite, Section.NO_TITLE);
    section.setLayoutData(GridDataFactory.fillDefaults().grab(true, false).span(2, 1).create());

    Expression exp = operation.getLeftOperand();
    for (IOperatorEditor opEditor : operatorEditors) {
        if (!opEditor.appliesTo(exp) && opEditor.appliesTo(operator.getType())) {
            operator.setType(ExpressionConstants.ASSIGNMENT_OPERATOR);
        }
    }
    createOperatorEditorFor(section, operator.getType(), operator, exp);

    context.bindValue(ViewersObservables.observeSingleSelection(operatorViewer),
            EMFObservables.observeValue(operator, ExpressionPackage.Literals.OPERATOR__TYPE));
    operatorViewer.addSelectionChangedListener(this);

    return mainComposite;
}