comboboxcelleditorex.java

对eclipse gef进行封装,可以生成图形化编辑器

/*******************************************************************************
 * $Header: /cvsroot/EOS6/work_dir/niegy/com.primeton.studio.gef.ui/src/com/primeton/studio/gef/ui/properties/ComboBoxCellEditorEx.java,v 1.1 2006/11/17 03:15:13 niegy Exp $
 * $Revision: 1.1 $
 * $Date: 2006/11/17 03:15:13 $
 *
 *==============================================================================
 *
 * Copyright (c) 2001-2006 Primeton Technologies, Ltd.
 * All rights reserved. 
 * 
 * Created on 2006-10-30
 *******************************************************************************/


package com.primeton.studio.gef.ui.properties;

import java.text.MessageFormat;

import org.eclipse.jface.viewers.ComboBoxCellEditor;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;

/**
 * TODO此处填写 class 信息
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: ComboBoxCellEditorEx.java,v $
 * Revision 1.1  2006/11/17 03:15:13  niegy
 * create
 * 
 */
public class ComboBoxCellEditorEx extends ComboBoxCellEditor {
    /**
     * The list of items to present in the combo box.
     */
    private String[] items;
    
    CCombo control;
    
    public ComboBoxCellEditorEx(Composite parent, String[] items, int style) {
        super(parent,items, style);
        
    }
    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.CellEditor#createControl(org.eclipse.swt.widgets.Composite)
     */
    protected Control createControl(Composite parent) {
        control = (CCombo)super.createControl(parent);
        control.addSelectionListener(new SelectionAdapter(){
            public void widgetSelected(SelectionEvent event) {
                applyAndDeactivate();
            }
        });
        return control;
    }

    protected void focusLost() {
        super.focusLost();
    }
    
    void applyAndDeactivate() {
        //  must set the selection before getting value
        int selection = control.getSelectionIndex();
        Object newValue = doGetValue();
        markDirty();
        boolean isValid = isCorrect(newValue);
        setValueValid(isValid);
        if (!isValid) {
            // try to insert the current value into the error message.
            setErrorMessage(
                MessageFormat.format(getErrorMessage(), new Object[] {items[selection]})); 
        }
        fireApplyEditorValue();
        deactivate();
    }
}