nodedirecteditmanager.java

GEF初学者可以用来对照的小例子

/*
 * 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.parts;

import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.tools.CellEditorLocator;
import org.eclipse.gef.tools.DirectEditManager;
import org.eclipse.swt.events.VerifyListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Text;

import com.example.figures.NodeFigure;
import com.example.model.Node;

/**
 * @author zhanghao
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class NodeDirectEditManager extends DirectEditManager {

    Font scaledFont;

    protected VerifyListener verifyListener;

    protected NodeFigure nodeFigure;

    /**
     * Creates a new ActivityDirectEditManager with the given attributes.
     * @param source the source EditPart
     * @param editorType type of editor
     * @param locator the CellEditorLocator
     */
    public NodeDirectEditManager(GraphicalEditPart source, Class editorType, CellEditorLocator locator) {
        super(source, editorType, locator);
        //    	this.nodeFigure = nodeFigure;
        this.nodeFigure = (NodeFigure) source.getFigure();
    }

    /**
     * @see org.eclipse.gef.tools.DirectEditManager#bringDown()
     */
//    protected void bringDown() {
//        //This method might be re-entered when super.bringDown() is called.
//        Font disposeFont = scaledFont;
//        scaledFont = null;
//        super.bringDown();
//        if (disposeFont != null)
//            disposeFont.dispose();
//    }

    /**
     * @see org.eclipse.gef.tools.DirectEditManager#initCellEditor()
     */
    protected void initCellEditor() {
        Text text = (Text) getCellEditor().getControl();
        //        verifyListener = new VerifyListener() {
        //            public void verifyText(VerifyEvent event) {
        //                Text text = (Text) getCellEditor().getControl();
        //                String oldText = text.getText();
        //                String leftText = oldText.substring(0, event.start);
        //                String rightText = oldText.substring(event.end, oldText.length());
        //                GC gc = new GC(text);
        //                String s = leftText + event.text + rightText;
        //                Point size = gc.textExtent(leftText + event.text + rightText);
        //                gc.dispose();
        //                if (size.x != 0)
        //                    size = text.computeSize(size.x, SWT.DEFAULT);
        //                getCellEditor().getControl().setSize(size.x, size.y);
        //            }
        //        };
        //        text.addVerifyListener(verifyListener);

        //    	String initialLabelText = nodeFigure.getText();
        getCellEditor().setValue(((Node) getEditPart().getModel()).getName());
        IFigure figure = ((GraphicalEditPart) getEditPart()).getFigure();
        scaledFont = figure.getFont();
        FontData data = scaledFont.getFontData()[0];
        Dimension fontSize = new Dimension(0, data.getHeight());
        nodeFigure.translateToAbsolute(fontSize);
        data.setHeight(fontSize.height);
        scaledFont = new Font(null, data);

        text.setFont(scaledFont);
        text.selectAll();
    }

    /**
     * @see org.eclipse.gef.tools.DirectEditManager#unhookListeners()
     */
//    protected void unhookListeners() {
//        super.unhookListeners();
//        Text text = (Text) getCellEditor().getControl();
//        text.removeVerifyListener(verifyListener);
//        verifyListener = null;
//    }
}