diagrameditor.java

GEF初学者可以用来对照的小例子

package com.dss.moon.gef.parts;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.DefaultEditDomain;
import org.eclipse.gef.GraphicalViewer;
import org.eclipse.gef.dnd.TemplateTransferDragSourceListener;
import org.eclipse.gef.dnd.TransferDragSourceListener;
import org.eclipse.gef.dnd.TransferDropTargetListener;
import org.eclipse.gef.editparts.ScalableFreeformRootEditPart;
import org.eclipse.gef.palette.PaletteRoot;
import org.eclipse.gef.ui.palette.PaletteViewer;
import org.eclipse.gef.ui.palette.PaletteViewerProvider;
import org.eclipse.gef.ui.parts.GraphicalEditor;
import org.eclipse.gef.ui.parts.GraphicalEditorWithFlyoutPalette;
import org.eclipse.ui.editors.text.TextEditor;

import com.dss.moon.gef.bnb.DiagramTemplateTransferDropTargetListener;
import com.dss.moon.gef.model.Diagram;
import com.dss.moon.gef.model.Ellipse;
import com.dss.moon.gef.view.PaletteFactory;

public class DiagramEditor extends GraphicalEditorWithFlyoutPalette {

	
	 private PaletteRoot root; 
	 
    public DiagramEditor() {

        setEditDomain(new DefaultEditDomain(this));

    }

    protected void initializeGraphicalViewer() {

           Diagram diagram = new Diagram();

           getGraphicalViewer().setContents(diagram);
           getGraphicalViewer().addDropTargetListener(new DiagramTemplateTransferDropTargetListener(getGraphicalViewer()));

    }

    protected void configureGraphicalViewer() {

           super.configureGraphicalViewer();

           GraphicalViewer viewer = getGraphicalViewer();

           viewer.setRootEditPart(new ScalableFreeformRootEditPart());

           viewer.setEditPartFactory(new PartFactory());

    }     

    public void doSave(IProgressMonitor monitor) {

    }

    public void doSaveAs() {

    }

    public boolean isSaveAsAllowed() {

           return false;

    }

	@Override
	protected PaletteRoot getPaletteRoot() {
		// TODO Auto-generated method stub
		if(root == null)
			root = PaletteFactory.createPalette();
		return root;
	}
	
	protected PaletteViewerProvider createPaletteViewerProvider(){
		return new PaletteViewerProvider(getEditDomain()){
			protected void configPaletteViewer(PaletteViewer viewer){
				super.configurePaletteViewer(viewer);
				viewer.addDragSourceListener(new TemplateTransferDragSourceListener(viewer));
			}
		};
		
	}
	
	////private TransferDropTargetListener createTransferDropTargetListener(){
		//return null;
		
	//}

}