Examples with ValueListener org.springsource.ide.eclipse.commons.livexp.core.ValueListener used on opensource projects

Example 1 with ValueListener

use of org.springsource.ide.eclipse.commons.livexp.core.ValueListener in project eclipse-integration-commons by spring-projects.

the class ChooseOneSectionCombo method createContents.

@Override
public void createContents(Composite page) {
    Composite field = new Composite(page, SWT.NONE);
    GridLayout layout = GridLayoutFactory.fillDefaults().numColumns(2).create();
    field.setLayout(layout);
    GridDataFactory.fillDefaults().grab(true, false).applyTo(field);
    Label fieldNameLabel = new Label(field, SWT.NONE);
    fieldNameLabel.setText(label);
    GridDataFactory labelGridData = GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.CENTER);
    if (useFieldLabelWidthHint) {
        labelGridData.hint(UIConstants.fieldLabelWidthHint(fieldNameLabel), SWT.DEFAULT);
    }
    labelGridData.applyTo(fieldNameLabel);
    final Combo combo = new Combo(field, inputParser == null ? SWT.READ_ONLY : SWT.NONE);
    options.addListener(new ValueListener<T[]>() {

        public void gotValue(org.springsource.ide.eclipse.commons.livexp.core.LiveExpression<T[]> exp, T[] value) {
            if (combo != null) {
                String oldText = combo.getText();
                // This will clear the selection sometimes
                combo.setItems(getLabels());
                combo_setText(combo, oldText);
            }
        }
    });
    GridDataFactory gridData = GridDataFactory.fillDefaults();
    if (inputParser != null) {
        gridData = gridData.hint(FIELD_TEXT_AREA_WIDTH, SWT.DEFAULT).minSize(FIELD_TEXT_AREA_WIDTH, SWT.DEFAULT);
    }
    if (grabHorizontal) {
        gridData = gridData.grab(grabHorizontal, false);
    }
    gridData.applyTo(combo);
    combo.addModifyListener(new ModifyListener() {

        public void modifyText(ModifyEvent e) {
            handleModifyText(combo);
        }
    });
    selection.selection.addListener(UIValueListener.from((exp, newSelection) -> {
        if (newSelection != null && !combo.isDisposed()) {
            // Technically, not entirely correct. This might
            // select the wrong element if more than one option
            // has the same label text.
            String newText = labelProvider.getText(newSelection);
            combo_setText(combo, newText);
            if (!combo.getText().equals(newText)) {
                // widget rejected the selection. To avoid widget state
                // and model state getting out-of-sync, refelct current
                // widget state back to the model:
                handleModifyText(combo);
            }
        }
    }));
}