1 protected void configureGraphicalViewer() { 2         super.configureGraphicalViewer(); 3  4         viewer = getGraphicalViewer(); 5

             1.提供缩放能力。 设置根图形的RootEditPart为ScalableRootEditPart：

 6         ScalableRootEditPart rootEditPart = new ScalableRootEditPart(); 7         viewer.setRootEditPart(rootEditPart); 8

             2.实际缩放的实现。ScalableRootEditPart 提供了一个 ZoomManager
             类，可以被用来管理图形的最大化，最小化等操作。对图形的缩放操作实际上是通过这个
             ZoomManager 实现的。

 9         ZoomManager zoomManager = rootEditPart.getZoomManager();   //获得ZoomManager
           //注册放大Action10         IAction action = new ZoomInAction(zoomManager);11         getActionRegistry().registerAction(action);
           //注册缩小Action12         action = new ZoomOutAction(zoomManager);13         getActionRegistry().registerAction(action);14 15         viewer.setEditPartFactory(new GraphicalPartFactory());这个是用来干嘛的？？16 17         ContextMenuProvider provider = new DiagramContextMenuProvider(viewer,18                 getActionRegistry());19         viewer.setContextMenu(provider);20         getSite().registerContextMenu(provider, viewer);21 22         KeyHandler keyHandler = new KeyHandler();23         keyHandler.put(KeyStroke.getPressed(SWT.DEL, 127, 0),24                 getActionRegistry().getAction(ActionFactory.DELETE.getId()));25         getGraphicalViewer().setKeyHandler(26                 new GraphicalViewerKeyHandler(getGraphicalViewer())27                         .setParent(keyHandler));28 29     }

  1 package ttcn3.gft.editor.ui.actions;  2   3 import org.eclipse.gef.ui.actions.ActionBarContributor;  4   5 import org.eclipse.gef.ui.actions.DeleteRetargetAction;  6 import org.eclipse.gef.ui.actions.GEFActionConstants;  7 import org.eclipse.gef.ui.actions.RedoRetargetAction;  8 import org.eclipse.gef.ui.actions.UndoRetargetAction;  9 import org.eclipse.gef.ui.actions.ZoomInRetargetAction; 10 import org.eclipse.gef.ui.actions.ZoomOutRetargetAction; 11 import org.eclipse.jface.action.IToolBarManager; 12 import org.eclipse.jface.action.Separator; 13 import org.eclipse.ui.IEditorPart; 14 import org.eclipse.ui.actions.ActionFactory; 15 import org.eclipse.ui.actions.RetargetAction; 16  17 import ttcn3.gft.editor.action.FilterAction; 18 import ttcn3.gft.editor.editor.DiagramEditor; 19 import ttcn3.gft.editor.ui.helper.IImageKey; 20  21 /** 22  * action bar for diagram editor 23  *  24  * @author user 25  *  26  */ 27  28 public class TTCNActionBarContributor extends ActionBarContributor { 29     3.添加缩放工具按钮 30     @Override 31     protected void buildActions() { 32         // TODO Auto-generated method stub 33         RetargetAction retargetAction = new RetargetAction(ActionFactory.SAVE.getId(), "SAVE"); 35         retargetAction.setImageDescriptor(IImageKey.getImageDescriptor(IImageKey.KEY_SAVE)); 37         addRetargetAction(retargetAction); 38  39         retargetAction = new RetargetAction(ActionFactory.COPY.getId(), "COPY"); 40         retargetAction.setImageDescriptor(IImageKey.getImageDescriptor(IImageKey.KEY_COPY)); 42         addRetargetAction(retargetAction); 43  44         retargetAction = new RetargetAction(ActionFactory.PASTE.getId(),"PASTE"); 46         retargetAction.setImageDescriptor(IImageKey.getImageDescriptor(IImageKey.KEY_PASTE)); 48         addRetargetAction(retargetAction); 49  50         retargetAction = new UndoRetargetAction(); 51         addRetargetAction(retargetAction); 52  53         retargetAction = new RedoRetargetAction(); 54         addRetargetAction(retargetAction); 55  56         retargetAction = new DeleteRetargetAction(); 57         retargetAction.setImageDescriptor(IImageKey.getImageDescriptor(IImageKey.KEY_DELETE)); 59         addRetargetAction(retargetAction); 60          61         addRetargetAction(new ZoomInRetargetAction()); 62         addRetargetAction(new ZoomOutRetargetAction()); 63  64         retargetAction = new RetargetAction(GenerateAction.getID(), "Generate"); 65         retargetAction.setImageDescriptor(IImageKey.getImageDescriptor(IImageKey.KEY_GENERATE)); 67         addRetargetAction(retargetAction); 68  69         retargetAction = new RetargetAction(FilterAction.getID(), "Filter"); 70         retargetAction.setImageDescriptor(IImageKey.getImageDescriptor(IImageKey.KEY_FILTER)); 72         addRetargetAction(retargetAction); 73  74         retargetAction = new RetargetAction(CompileAction.getID(), "Compile"); 75         retargetAction.setImageDescriptor(IImageKey.getImageDescriptor(IImageKey.KEY_COMPILE)); 77         addRetargetAction(retargetAction); 78  79         retargetAction = new RetargetAction(ActionFactory.PRINT.getId(),"Print"); 81         retargetAction.setImageDescriptor(IImageKey.getImageDescriptor(IImageKey.KEY_PRINT)); 83         addRetargetAction(retargetAction); 84  85     } 86  87     @Override 88     protected void declareGlobalActionKeys() { 89         // TODO Auto-generated method stub 90  91     } 92  93     @Override 94     public void contributeToToolBar(IToolBarManager toolBarManager) { 95         toolBarManager.add(getAction(ActionFactory.SAVE.getId())); 96         toolBarManager.add(new Separator()); 97  98         toolBarManager.add(getAction(ActionFactory.COPY.getId())); 99         toolBarManager.add(getAction(ActionFactory.PASTE.getId()));100         toolBarManager.add(new Separator());101 102         toolBarManager.add(getAction(ActionFactory.UNDO.getId()));103         toolBarManager.add(getAction(ActionFactory.REDO.getId()));104         toolBarManager.add(getAction(ActionFactory.DELETE.getId()));105         toolBarManager.add(new Separator());106 107         toolBarManager.add(getAction(GEFActionConstants.ZOOM_IN));108         toolBarManager.add(getAction(GEFActionConstants.ZOOM_OUT));109         toolBarManager.add(new Separator());110 111         toolBarManager.add(getAction(FilterAction.getID()));112         toolBarManager.add(getAction(GenerateAction.getID()));113         toolBarManager.add(getAction(CompileAction.getID()));114         toolBarManager.add(getAction(ActionFactory.PRINT.getId()));115 116         // toolBarManager.add(new ZoomComboContributionItem(getPage()));117     }118 119     @Override120     public void setActiveEditor(IEditorPart editor) {121         // TODO Auto-generated method stub122         super.setActiveEditor(editor);123 124         if (editor instanceof DiagramEditor) {125             getActionBars().getStatusLineManager().setMessage(126                     ((DiagramEditor) editor).getPartName());127         }128     }129 }