如何设置双击来编辑SWT/JFace中的表格单元格？

Question

是否可以通过双击来更改SWT/JFace的默认行为以启用单元编辑？现在的方式（单击）很难选择一个表格行，而不需要将文本字段放在上面。

这里是一个自包含的代码片段：

package table.editing; 

import org.eclipse.jface.viewers.CellEditor; 
import org.eclipse.jface.viewers.CellLabelProvider; 
import org.eclipse.jface.viewers.EditingSupport; 
import org.eclipse.jface.viewers.TableViewer; 
import org.eclipse.jface.viewers.TableViewerColumn; 
import org.eclipse.jface.viewers.TextCellEditor; 
import org.eclipse.jface.viewers.ViewerCell; 
import org.eclipse.jface.window.ApplicationWindow; 
import org.eclipse.swt.SWT; 
import org.eclipse.swt.layout.FillLayout; 
import org.eclipse.swt.widgets.Composite; 
import org.eclipse.swt.widgets.Control; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Table; 
import org.eclipse.swt.widgets.TableColumn; 

public class TableEditor extends ApplicationWindow { 

    class Element { 
     private String value; 

     public Element(String value) { 
      this.value = value; 
     } 

     public String getValue() { 
      return value; 
     } 

     public void setValue(String value) { 
      this.value = value; 
     } 
    } 

    public TableEditor() { 
     super(null); 

     setBlockOnOpen(true); 
     open(); 

     Display.getCurrent().dispose(); 
    } 

    protected Control createContents(Composite parent) { 
     Composite composite = new Composite(parent, SWT.NONE); 
     composite.setLayout(new FillLayout()); 

     TableViewer viewer = new TableViewer(composite, SWT.MULTI 
       | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION | SWT.BORDER); 

     createColumns(composite, viewer); 
     addElements(viewer); 

     final Table table = viewer.getTable(); 
     table.setHeaderVisible(true); 
     table.setLinesVisible(true); 

     return composite; 
    } 

    private void addElements(TableViewer viewer) { 
     for (int i = 0; i < 10; i++) { 
      viewer.add(new Element("Element " + i)); 
     } 
    } 

    private void createColumns(Composite parent, final TableViewer viewer) { 
     TableViewerColumn columnViewer = new TableViewerColumn(viewer, SWT.NONE); 
     columnViewer.setLabelProvider(new CellLabelProvider() { 

      @Override 
      public void update(ViewerCell cell) { 
       Element element = (Element) cell.getElement(); 
       cell.setText(element.getValue()); 
      } 
     }); 
     columnViewer.setEditingSupport(new EditingSupport(viewer) { 

      @Override 
      protected void setValue(Object element, Object value) { 
       ((Element) element).setValue((String) value); 
      } 

      @Override 
      protected Object getValue(Object element) { 
       return ((Element) element).getValue(); 
      } 

      @Override 
      protected CellEditor getCellEditor(Object element) { 
       return new TextCellEditor(viewer.getTable()); 
      } 

      @Override 
      protected boolean canEdit(Object element) { 
       return true; 
      } 
     }); 
     TableColumn column = columnViewer.getColumn(); 
     column.setText("Example"); 
     column.pack(); 
    } 

    public static void main(String[] args) { 
     new TableEditor(); 
    } 
} 

Answer 1

您需要设置自己的TableViewerEditor上TableViewer。看看下面的代码：

TableViewer viewer = ... 

TableViewerFocusCellManager focusCellManager = new TableViewerFocusCellManager(viewer, new FocusCellOwnerDrawHighlighter(viewer)); 

ColumnViewerEditorActivationStrategy activationSupport = new ColumnViewerEditorActivationStrategy(viewer) { 
    protected boolean isEditorActivationEvent(ColumnViewerEditorActivationEvent event) { 
     // Enable editor only with mouse double click 
     if (event.eventType == ColumnViewerEditorActivationEvent.MOUSE_DOUBLE_CLICK_SELECTION) { 
      EventObject source = event.sourceEvent; 
      if (source instanceof MouseEvent && ((MouseEvent)source).button == 3) 
       return false; 

      return true; 
     } 

     return false; 
    } 
}; 

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