Question

我正在尝试执行扩展TextCellEditor的代码块并使用org.eclipse.jface.fieldassist来触发内容提议。代码执行正常但弹出的内容提议未被触发。此单元格也不可编辑。请告诉我这里有什么问题？

public class Snippet060TextCellEditorWithContentProposal {
private static class Color {
    public String name;

    public Color(String name) {
        this.name = name;
    }

    public String toString() {
        return name;
    }
}

public static class TextCellEditorWithContentProposal extends
        TextCellEditor {

    private ContentProposalAdapter contentProposalAdapter;
    private boolean popupOpen = false; // true, iff popup is currently open

    public TextCellEditorWithContentProposal(Composite parent,
            IContentProposalProvider contentProposalProvider,
            KeyStroke keyStroke, char[] autoActivationCharacters) {
        super(parent);

        enableContentProposal(contentProposalProvider, keyStroke,
                autoActivationCharacters);
    }

    private void enableContentProposal(
            IContentProposalProvider contentProposalProvider,
            KeyStroke keyStroke, char[] autoActivationCharacters) {
        contentProposalAdapter = new ContentProposalAdapter(text,
                new TextContentAdapter(), contentProposalProvider,
                keyStroke, autoActivationCharacters);

        // Listen for popup open/close events to be able to handle focus
        // events correctly
        contentProposalAdapter
                .addContentProposalListener(new IContentProposalListener2() {

                    public void proposalPopupClosed(
                            ContentProposalAdapter adapter) {
                        popupOpen = false;
                    }

                    public void proposalPopupOpened(
                            ContentProposalAdapter adapter) {
                        popupOpen = true;
                    }
                });
    }

    /**
     * Return the {@link ContentProposalAdapter} of this cell editor.
     * 
     * @return the {@link ContentProposalAdapter}
     */
    public ContentProposalAdapter getContentProposalAdapter() {
        return contentProposalAdapter;
    }

    protected void focusLost() {
        if (!popupOpen) {
            // Focus lost deactivates the cell editor.
            // This must not happen if focus lost was caused by activating
            // the completion proposal popup.
            super.focusLost();
        }
    }

    protected boolean dependsOnExternalFocusListener() {
        // Always return false;
        // Otherwise, the ColumnViewerEditor will install an additional
        // focus listener
        // that cancels cell editing on focus lost, even if focus gets lost
        // due to
        // activation of the completion proposal popup. See also bug 58777.
        return false;
    }
}

private static class ColorNameEditingSupport extends EditingSupport {
    private TextCellEditorWithContentProposal cellEditor;

    public ColorNameEditingSupport(TableViewer viewer) {
        super(viewer);

        IContentProposalProvider contentProposalProvider = new SimpleContentProposalProvider(
                new String[] { "red", "green", "blue" });
        cellEditor = new TextCellEditorWithContentProposal(
                viewer.getTable(), contentProposalProvider, null, null);
    }

    protected boolean canEdit(Object element) {
        return (element instanceof Color);
    }

    protected CellEditor getCellEditor(Object element) {
        return cellEditor;
    }

    protected Object getValue(Object element) {
        return ((Color) element).name;
    }

    protected void setValue(Object element, Object value) {
        ((Color) element).name = value.toString();
        getViewer().update(element, null);
    }

}

public Snippet060TextCellEditorWithContentProposal(Shell shell) {
    final TableViewer viewer = new TableViewer(shell, SWT.BORDER
            | SWT.FULL_SELECTION);
    final Table table = viewer.getTable();
    table.setLinesVisible(true);
    table.setHeaderVisible(true);

    final TableViewerColumn colorColumn = new TableViewerColumn(viewer,
            SWT.LEFT);
    colorColumn.getColumn().setText("Color name");
    colorColumn.getColumn().setWidth(200);
    colorColumn.setLabelProvider(new ColumnLabelProvider());
    colorColumn.setEditingSupport(new ColorNameEditingSupport(viewer));

    viewer.setContentProvider(new ArrayContentProvider());

    ColumnViewerEditorActivationStrategy activationSupport = new ColumnViewerEditorActivationStrategy(
            viewer) {
        protected boolean isEditorActivationEvent(
                ColumnViewerEditorActivationEvent event) {
            return event.eventType == ColumnViewerEditorActivationEvent.TRAVERSAL
                    || event.eventType == ColumnViewerEditorActivationEvent.MOUSE_DOUBLE_CLICK_SELECTION
                    || event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC
                    || (event.eventType == ColumnViewerEditorActivationEvent.KEY_PRESSED && event.keyCode == KeyLookupFactory
                            .getDefault().formalKeyLookup(
                                    IKeyLookup.ENTER_NAME));
        }
    };
    activationSupport.setEnableEditorActivationWithKeyboard(true);

    /*
     * Without focus highlighter, keyboard events will not be delivered to
     * ColumnViewerEditorActivationStragety#isEditorActivationEvent(...)
     * (see above)
     */
    FocusCellHighlighter focusCellHighlighter = new FocusCellOwnerDrawHighlighter(
            viewer);
    TableViewerFocusCellManager focusCellManager = new TableViewerFocusCellManager(
            viewer, focusCellHighlighter);

    TableViewerEditor.create(viewer, focusCellManager, activationSupport,
            ColumnViewerEditor.TABBING_VERTICAL
                    | ColumnViewerEditor.KEYBOARD_ACTIVATION);

    viewer.setInput(createModel());
}

private Color[] createModel() {
    return new Color[] { new Color("red"), new Color("green") };
}

/**
 * @param args
 */
public static void main(String[] args) {
    Display display = new Display();

    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    new Snippet060TextCellEditorWithContentProposal(shell);
    shell.open();

    while (!shell.isDisposed()) {
        if (!display.readAndDispatch())
            display.sleep();
    }

    display.dispose();
}
 }

Answer 1

这是按预期工作的，没有意识到单元格已注册鼠标双击动作。双击弹出

SWT / JFace TextCellEditor字段辅助不起作用

1 个答案: