nodedirecteditmanager.java

eclipse开发笔记

package hellogef.control;

import hellogef.model.NodeModel;
import hellogef.view.NodeFigure;

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;

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(((NodeModel) 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;
//	}
}