ngcoolbar.java

Novocode的 SWT 控件框架 丰富了MDI功能

/*******************************************************************************
 * Copyright (c) 2004 Stefan Zeiger and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.novocode.com/legal/epl-v10.html
 * 
 * Contributors:
 *     Stefan Zeiger ([e-mail]) - initial API and implementation
 *******************************************************************************/

package com.novocode.naf.gui;

import java.util.List;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;

import com.novocode.naf.app.*;
import com.novocode.naf.data.DataDecoder;
import com.novocode.naf.data.ModelBinding;
import com.novocode.naf.data.XMLProperty;
import com.novocode.naf.gui.event.ChangeEvent;
import com.novocode.naf.gui.event.IChangeListener;
import com.novocode.naf.model.DefaultBooleanModel;
import com.novocode.naf.model.IBooleanReadModel;
import com.novocode.naf.resource.*;


/**
 * A CoolBar widget.
 * 
 * @author Stefan Zeiger ([e-mail])
 * @since Feb 16, 2004
 */

public final class NGCoolBar extends NGWidget
{
  private boolean resizable, border, flat, recursivePopup;


  @XMLProperty public void setResizable(boolean b) { this.resizable = b; }
  public boolean isResizable() { return resizable; }

  
  @XMLProperty public void setBorder(boolean b) { this.border = b; }
  public boolean getBorder() { return border; }

  
  @XMLProperty public void setFlat(boolean b) { this.flat = b; }
  public boolean isFlat() { return flat; }

  
  @XMLProperty public void setRecursivePopup(boolean b) { this.recursivePopup = b; }
  public boolean getRecursivePopup() { return recursivePopup; }

  
  public Control createControl(Composite parent, NGComponent parentComp, ShellWindowInstance wi, WidgetData pwd) throws NAFException
  {
    int style = SWT.NONE;
    if(border) style |= SWT.BORDER;
    if(flat) style |= SWT.FLAT;
    final CoolBar bar = new CoolBar(parent, style);
    return bar;
  }
  

  protected void configureControl(final Control control, final ShellWindowInstance wi, WidgetData wd, WidgetData pwd)
  {
    super.configureControl(control, wi, wd, pwd);
    final CoolBar bar = (CoolBar)control;

    /* [TODO] Implement chevron dropdown for resizable=true
     * as shown in http://dev.eclipse.org/viewcvs/index.cgi/~checkout~/platform-swt-home/snippits/snippet140.html */
    List<NGWidget> chlist = getChildren(null);
    for(NGWidget ch : chlist)
    {
      CoolItem item = new CoolItem(bar, resizable ? SWT.DROP_DOWN : SWT.NONE);
      wd.attachTo(item);
      Control itemControl = ch.createAndConfigureControl(bar, this, wi);
      item.setControl(itemControl);
      itemControl.pack();
      Point size = itemControl.getSize();
      Point itemSize = item.computeSize(size.x, size.y);
      item.setSize(itemSize);
      if(!resizable) item.setMinimumSize(size);
    }

    bar.pack();
    final Point oldSize = bar.computeSize(SWT.DEFAULT, SWT.DEFAULT);
    bar.addListener(SWT.Resize, new Listener()
    {
      public void handleEvent(Event event)
      {
        Point newSize = bar.computeSize(SWT.DEFAULT, SWT.DEFAULT);
        if(newSize.y != oldSize.y)
        {
          //System.out.println("Preferred size: "+newSize);
          //System.out.println("Actual size: "+bar.getSize());
          bar.getParent().layout(true);
        }
        //oldSize.x = newSize.x;
        oldSize.y = newSize.y;
      }
    });

    final IBooleanReadModel lockedModel = getModel("locked", wi.models);
    if(lockedModel != null)
    {
      IChangeListener cl = new IChangeListener()
      {
        public void stateChanged(ChangeEvent e)
        {
          boolean b = lockedModel.getBoolean();
          if(bar.getLocked() != b) bar.setLocked(b);
        }
      };
      SWTUtil.registerModel(bar, lockedModel, cl);
      cl.stateChanged(null);
    }
  }

  
  protected Object createDefaultModel(ModelBinding mb)
  {
    if("locked".equals(mb.type))
      return new DefaultBooleanModel(DataDecoder.decodeBoolean(mb.getAttribute("initial"), false));
    else return super.createDefaultModel(mb);
  }
}