GEF-whole-upload 实验随笔一：搭建编辑器

看了dengues，突发奇想，如果能用gef-whole-upload的例子，也开发一个类似的studio，那对于学习和工作，帮助应该都很大

那么，从跟着gef-whole-upload开始，算是实验课吧，就记录在这里吧

首先，建立一个plugin工程，设置为rcp模式

1.new->plugin project

2.选择hello rcp

3.出来了一个包，里面存放着Activator.java(控制插件的生命周期)，Application.java（控制程序执行的各个方面），ApplicationActionBar.java（应用程序的按钮等），ApplicationWorkbenchWindowAdvisor.java（显示程序启动的方式及初始状态等），ApplicationWorkbenchAdvisor（这个不知道是用来做什么的），perspective.java(程序的属性)

4.在extensions中加入org.eclipse.ui.editors插件，用来新建一个编辑器，并设置id作为该编辑器的标示符，设置一个class：editor.class，放在xxx.ui包中

5.在Application中实现IPlatformRunable接口及IApplication接口，在start方法中加入

Application中的start方法

public Object start(IApplicationContext context) throws Exception
    {
        Display display = PlatformUI.createDisplay();
        try
        {
            int returnCode = PlatformUI.createAndRunWorkbench(display,
                    new ApplicationWorkbenchAdvisor());
            if (returnCode == PlatformUI.RETURN_RESTART)
                return IApplication.EXIT_RESTART;
            else
                return IApplication.EXIT_OK;
        } finally
        {
            display.dispose();
        }

    }

并且在run方法中加入

public Object run(Object args) throws Exception
    {
        // TODO Auto-generated method stub
        Display display = PlatformUI.createDisplay();
        try
        {
            int returnCode = PlatformUI.createAndRunWorkbench(display, new ApplicationWorkbenchAdvisor());
            if (returnCode == PlatformUI.RETURN_RESTART)
                return IPlatformRunnable.EXIT_RESTART;
            return IPlatformRunnable.EXIT_OK;
        }
        finally
        {
            display.dispose();
        }
    }

6.定义一个画图的按钮：EditorAction

public class EditorAction extends Action implements ISelectionListener,
        IWorkbenchAction
{
    private final IWorkbenchWindow window;
    private IStructuredSelection selection;
    
    public static final String ID = "com.newland.editor";
    
    public EditorAction(IWorkbenchWindow window)
    {
        this.window = window;
        setId(ID);
        setText("&design");
        setToolTipText("Create a Newland File");
        window.getSelectionService().addSelectionListener(this);
    }
    
    @Override
    public void dispose()
    {
        // TODO Auto-generated method stub
        window.getSelectionService().removeSelectionListener(this);
    }

    @Override
    public void selectionChanged(IWorkbenchPart part, ISelection selection)
    {
        // TODO Auto-generated method stub

    }

}

 

7.在ApplicationActionBarAdvisor中加入按钮

ApplicationActionBarAdvisor中加入按钮

protected void makeActions(IWorkbenchWindow window)
    {
        exitAction = ActionFactory.QUIT.create(window);
        register(exitAction);
        aboutAction = ActionFactory.ABOUT.create(window);
        register(aboutAction);
        editorAction = new EditorAction(window);
        register(editorAction);
        
    }

    protected void fillMenuBar(IMenuManager menuBar)
    {
        MenuManager fileMenu = new MenuManager("&New", "New");
        fileMenu.add(editorAction);
        fileMenu.add(new Separator());
        fileMenu.add(exitAction);
        
        MenuManager helpMenu = new MenuManager("&Help","help");
        helpMenu.add(aboutAction);
        
        menuBar.add(fileMenu);
        menuBar.add(helpMenu);
    }

8.设置编辑器的输入类：新建类：EditorInput

private IPath path;

    public NewlandEditorInput(IPath path)
    {
        // TODO Auto-generated constructor stub
        this.path = path;
    }
    @Override
    public boolean exists()
    {
        // TODO Auto-generated method stub
        return path.toFile().exists();
    }

    @Override
    public ImageDescriptor getImageDescriptor()
    {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public String getName()
    {
        // TODO Auto-generated method stub
        return path.toString();
    }

    @Override
    public IPersistableElement getPersistable()
    {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public String getToolTipText()
    {
        // TODO Auto-generated method stub
        return path.toString();
    }

    @Override
    public Object getAdapter(Class adapter)
    {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public IPath getPath()
    {
        // TODO Auto-generated method stub
        return path;
    }

    public int hashCode()
    {
        return path.hashCode();
    }

9.设置打开编辑器：在editorAction中加入下面代码

public void run()
    {
        String path = openFileDialog();
        if (path != null)
        {
            IEditorInput input = new NewlandEditorInput(new Path(path));
            IWorkbenchPage page = window.getActivePage();
            try
            {
                page.openEditor(input, NewlandEditor.ID,true);
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
        }
    }

    private String openFileDialog()
    {
        // TODO Auto-generated method stub
        FileDialog dialog = new FileDialog(window.getShell(),SWT.OPEN);
        dialog.setText("Design Files");
        dialog.setFilterExtensions(new String[] {".design"});
        return dialog.open();
    }

10.在Perspective.java中设置可见

在Perspective.java中设置可见

public void createInitialLayout(IPageLayout layout)
    {
        layout.setEditorAreaVisible(true);
    }

11.设置gef命令堆栈的存放位置

setEditDomain(new DefaultEditDomain(this));

 

这样一个编辑器基本搭建好了