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Another feature you need to have is the ability to edit the name of the Favorites items directly in the Favorites view quickly and easily It is arguable that it should trigger the rename handler or refactoring so that the underlying resource or Java element will be renamed rather than just editing the name of the item itself, but things are kept simple for the purposes of demonstrating the inline editing function To perform inline editing of a Favorites item s name, a new handler named RenameFavoriteHandler is needed When the user selects the Rename command in the context menu, a text field opens over the selected item s name in the Favorites view (see Figure 7 8) The user enters the new name into the text field and presses the Return key, which closes the editor and updates the item s name
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Figure 7 8 Favorites view showing the inline text field
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This new handler obtains the current selection and open a cell editor on the name of the first selected element
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public class RenameFavoritesHandler extends AbstractHandler { private static final int COLUMN_TO_EDIT = 1; public Object execute(ExecutionEvent event) throws ExecutionException { IWorkbenchPart part = HandlerUtilgetActivePart(event); if (!(part instanceof FavoritesView)) return null; editElement((FavoritesView) part); return null; } public void editElement(FavoritesView favoritesView) { TableViewer viewer = favoritesViewgetFavoritesViewer(); IStructuredSelection selection = (IStructuredSelection) viewergetSelection(); if (!selectionisEmpty()) viewereditElement( selectiongetFirstElement(), COLUMN_TO_EDIT); } }
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To make the Rename command appear in the context menu, we declare a new command (see Section 611, Defining a command, on page 216), a new menuContribution (see Section 626, Defining a view-specific menu or toolbar item, on page 228), and the handler (see Section 63, Handlers, on page 236) in the plug-in manifest Use the following locatorURI so that the Rename command shows up only in the Favorites view context menu in the correct position
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popup:comqualityeclipsefavoritesviewsFavoritesView before=edit
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In the Favorites view context menu, the Rename command is enabled even when there is nothing selected To clean this up, add this enabledWhen expression to the handler so that the menu item is only enabled if there are one or more items selected in the Favorites view
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<handler class= "comqualityeclipsefavoriteshandlersRenameFavoritesHandler" commandId="comqualityeclipsefavoritescommandsrename"> <enabledWhen> <with variable="selection"> <count value="+"/> </with> </enabledWhen> </handler>
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Next, we must modify the FavoritesView table to open a text cell editor when the Rename command is selected, display the appropriate text in that cell editor, and store the modified value back into the underlying model Start by modifying createPartControl to call a new createInlineEditor method This method initializes a new TableViewerColumn that is responsible for positioning and sizing the cell editor over the item being renamed and managing that cell editor s lifecycle An EditingSupport object instantiates the cell editor, in this case a Text field, initializes its value and stores the resulting user modification back into the Favorites model
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private void createInlineEditor() { TableViewerColumn column = new TableViewerColumn(viewer, nameColumn); columnsetLabelProvider(new ColumnLabelProvider() { public String getText(Object element) { return ((IFavoriteItem) element)getName(); } }); columnsetEditingSupport(new EditingSupport(viewer) { TextCellEditor editor = null; protected boolean canEdit(Object element) { return true; } protected CellEditor getCellEditor(Object element) { if (editor == null) { Composite table = (Composite) viewergetControl(); editor = new TextCellEditor(table); } return editor; } protected Object getValue(Object element) { return ((IFavoriteItem) element)getName(); } protected void setValue(Object element, Object value) { ((IFavoriteItem) element)setName((String) value); viewerrefresh(element); } }); }
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At this point, the user can select the Rename command in the context menu or click on the name in the Favorites view to rename a particular Favorites item The TableViewerColumn provides the click to rename behavior by default which is not quite what we want To modify this behavior, we add the following at the end of the createInlineEditor method to allow cell