java gef开发实例

/* * Created on 2005-1-24 * * TODO To change the template for this generated file go to * Window - Preferences - Java - Code Style - Code Templates */ package com.example.ui; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.gef.DefaultEditDomain; import org.eclipse.gef.dnd.TemplateTransferDragSourceListener; import org.eclipse.gef.editparts.ScalableFreeformRootEditPart; import org.eclipse.gef.palette.PaletteRoot; import org.eclipse.gef.ui.actions.ActionRegistry; import org.eclipse.gef.ui.parts.ContentOutlinePage; import org.eclipse.gef.ui.parts.GraphicalEditorWithPalette; import org.eclipse.gef.ui.parts.TreeViewer; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.ui.IActionBars; import org.eclipse.ui.IEditorInput; import org.eclipse.ui.IWorkbenchActionConstants; import org.eclipse.ui.part.IPageSite; import org.eclipse.ui.views.contentoutline.IContentOutlinePage; import com.example.dnd.DiagramTemplateTransferDropTargetListener; import com.example.model.Diagram; import com.example.parts.PartFactory; import com.example.parts.TreePartFactory; import com.example.tools.PaletteFactory; /** * @author zhanghao * * TODO To change the template for this generated type comment go to * Window - Preferences - Java - Code Style - Code Templates */ public class PracticeEditor extends GraphicalEditorWithPalette { private Diagram diagram = new Diagram(); private PaletteRoot paletteRoot; public Diagram getDiagram() { return this.diagram; } public PracticeEditor() { setEditDomain(new DefaultEditDomain(this)); } protected void configureGraphicalViewer() { super.configureGraphicalViewer(); getGraphicalViewer().setRootEditPart(new ScalableFreeformRootEditPart()); getGraphicalViewer().setEditPartFactory(new PartFactory()); } protected void initializeGraphicalViewer() { getGraphicalViewer().setContents(this.diagram); getGraphicalViewer().addDropTargetListener(new DiagramTemplateTransferDropTargetListener(getGraphicalViewer())); } public void doSave(IProgressMonitor monitor) { } public void doSaveAs() { } public boolean isDirty() { return getCommandStack().isDirty(); } public boolean isSaveAsAllowed() { return true; } protected void setInput(IEditorInput input) { super.setInput(input); // IFile file = ((IFileEditorInput) input).getFile(); diagram = new Diagram(); // try { // attempt to read from a file // InputStream istream = file.getContents(false); // diagram = Diagram.makeFromStream(istream); // } catch (Exception e) { // but if there's an error, create a new diagram // e.printStackTrace(); // diagram = new Diagram(); // } } public Object getAdapter(Class type) { if (type == IContentOutlinePage.class) return new OutlinePage(); return super.getAdapter(type); } protected PaletteRoot getPaletteRoot() { if (this.paletteRoot == null) { this.paletteRoot = PaletteFactory.createPalette(); } return this.paletteRoot; } protected void initializePaletteViewer() { super.initializePaletteViewer(); getPaletteViewer().addDragSourceListener(new TemplateTransferDragSourceListener(getPaletteViewer())); } class OutlinePage extends ContentOutlinePage { // private PageBook pageBook; private Control outline; public OutlinePage() { super(new TreeViewer()); } public void init(IPageSite pageSite) { super.init(pageSite); ActionRegistry registry = getActionRegistry(); IActionBars bars = pageSite.getActionBars(); String id = IWorkbenchActionConstants.UNDO; bars.setGlobalActionHandler(id, registry.getAction(id)); id = IWorkbenchActionConstants.REDO; bars.setGlobalActionHandler(id, registry.getAction(id)); id = IWorkbenchActionConstants.DELETE; bars.setGlobalActionHandler(id, registry.getAction(id)); bars.updateActionBars(); } public void createControl(Composite parent) { // pageBook = new PageBook(parent, SWT.NONE); // outline = getViewer().createControl(pageBook); // pageBook.showPage(outline); outline = getViewer().createControl(parent); getSelectionSynchronizer().addViewer(getViewer()); getViewer().setEditDomain(getEditDomain()); getViewer().setEditPartFactory(new TreePartFactory()); // getViewer().setKeyHandler(getCommonKeyHandler()); getViewer().setContents(getDiagram()); } public Control getControl() { // return pageBook; return outline; } public void dispose() { getSelectionSynchronizer().removeViewer(getViewer()); super.dispose(); } } }