基于eclipse GEF开发Google GWT矢量图形应用(eclipse gef on gwt)

下面这个整合案例来自http://code.google.com/p/gwt-html5-graph/

实际的运行案例:

Demo1(GEF Sample): http://euml.trufun.net/drawx/gef-sample/Gef_sample.html

 

源码:

1、在gwt.xml中加入对GEF的依赖:

<inherits name='GEF' />

2、按照GEF API,开发相应的editparts, figures, commands, editpolicies,actions,context menus,以及图形数据的序列化
3、整合GEF和GWT。
3.1)继承drawx提供的DiagramEditorWithPalette,如下:








import org.drawx.gef.sample.client.tool.example.model.CanvasModel;





import org.drawx.gef.sample.client.tool.example.model.MyConnectionModel;





import org.drawx.gef.sample.client.tool.example.model.OrangeModel;





import org.drawx.gef.ui.editor.DiagramEditorWithPalette;





import org.drawx.gef.ui.editor.ToolPalette;





import org.eclipse.gef.EditPartFactory;





import org.eclipse.gef.requests.CreationFactory;





import org.eclipse.swt.widgets.internal.menu.MenuManager;











import com.google.gwt.user.client.ui.Image;











public class MyDiagramEditor extends DiagramEditorWithPalette{











        public MyDiagramEditor(boolean b) {





                super(b);





        }











        @Override





        public EditPartFactory getEditPartFactory() {





                return new org.drawx.gef.sample.client.tool.example.editparts.MyEditPartFactory();





        }











        @Override





        public Object getContents() {





                return new CanvasModel();





        }











        @Override





        public void initPalette(ToolPalette palette) {





                palette.addCreationTool("Create Node", new Image(Images.INSTANCE.newModel().getURL()), new CreationFactory() {











                        public Object getNewObject() {





                                return new OrangeModel();





                        }











                        public Object getObjectType() {





                                return OrangeModel.class;





                        }





                });





                palette.addConnectionTool("Create Connection", new Image(Images.INSTANCE.newConnection().getURL()), new CreationFactory() {











                        public Object getNewObject() {





                                return new MyConnectionModel();





                        }











                        public Object getObjectType() {





                                return MyConnectionModel.class;





                        }





                });





        }











        @Override





        protected void doSave() {





                





        }











        @Override





        protected void createAppActions() {





                





        }











        @Override





        protected MenuManager getContextMenu() {





                return new MyContextMenuProvider(this.getGraphicalViewer(), this





                                .getActionRegistry());





        }











}

 

3.2)将diagram editor加入到WEB页面上



private void createTab1(TabLayoutPanel p) {





                DiagramEditorWithPalette editor = new MyDiagramEditor(true);





                p.add(editor.getWidget(), "Fill Canvas");





        }

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