java - jface 向导中的 onclick 下一个按钮事件

Question

我有一个包含两个页面的jface 向导。

• 第一页:创建一个项目文件夹。
• 第二页:在第一步创建的文件夹内创建类。

但是当我单击下一步按钮时，第一页不会创建下一步要选择的文件夹，只有当我单击完成按钮时才会创建。

如何在单击下一步按钮时创建文件夹？

我的代码:

public class ShapesCreationWizard extends Wizard implements INewWizard,
    IExecutableExtension {

private WizardNewProjectCreationPage _mainPage;
private CreationPage page2;

// cache of newly-created project
private IProject _newProject;

// switch to control write of trace data
private boolean _bTraceEnabled = true;


public void addPages() {

    _mainPage = new WizardNewProjectCreationPage("Project");
    _mainPage.setDescription("Create a new project .");
    _mainPage.setTitle("New Project");
    addPage(_mainPage); 
    addPage(page2);
}

public IProject getNewProject() {
    return _newProject;
}

public void init(IWorkbench workbench, IStructuredSelection selection) {
    page2 = new CreationPage(workbench, selection);
}

public boolean performFinish() {
    createNewProject();
    if (_config != null) {
        BasicNewProjectResourceWizard.updatePerspective(_config);
        BasicNewProjectResourceWizard.selectAndReveal(this._newProject,
                PlatformUI.getWorkbench().getActiveWorkbenchWindow());
    }
    page2.finish();
    return true;

}


public IProject createNewProject() {
    if (_newProject != null) {
        return _newProject;
    }
    // get a project handle
    final IProject newProjectHandle = _mainPage.getProjectHandle();

    // get a project descriptor
    IPath defaultPath = Platform.getLocation();
    IPath newPath = _mainPage.getLocationPath();
    if (defaultPath.equals(newPath)) {
        newPath = null;
    }
    IWorkspace workspace = ResourcesPlugin.getWorkspace();
    final IProjectDescription description = workspace
            .newProjectDescription(newProjectHandle.getName());
    description.setLocation(newPath);

    // create the new project operation
    WorkspaceModifyOperation op = new WorkspaceModifyOperation() {
        protected void execute(IProgressMonitor monitor)
                throws CoreException {
            createProject(description, newProjectHandle, monitor);
            // addOWLNature(newProjectHandle);

        }
    };

    // run the new project creation operation
    try {
        getContainer().run(false, true, op);
    } catch (InterruptedException e) {
        return null;
    } catch (InvocationTargetException e) { 

        return null;
    }

    _newProject = newProjectHandle;

    return _newProject;
}


public void createProject(IProjectDescription description,IProject projectHandle, IProgressMonitor monitor)
        throws CoreException {
    try {
        monitor.beginTask("",2000);

        projectHandle.create(description, new SubProgressMonitor(monitor,1000));

        if (monitor.isCanceled()) {
            throw new OperationCanceledException();
        }
        projectHandle.open(new SubProgressMonitor(monitor,1000));

    } finally {
        monitor.done();
    }
}


protected void resultInformation(String title, String msg) {
    // Confirm Result
    if (_bTraceEnabled) {
        // trace only to console
        System.out.println(title + msg);
    } else {
        // user interaction response
        MessageDialog.openInformation(getShell(), title, msg);
    }

}


protected void resultError(String title, String msg) {
    // Indicate Error
    if (_bTraceEnabled) {
        // trace only to console
        System.out.println(title + msg);
    } else {
        // user interaction response
        MessageDialog.openError(getShell(), title, msg);
    }

}

private IConfigurationElement _config;


public void setInitializationData(IConfigurationElement config,String propertyName, Object data) throws CoreException {
        _config = config;

}
}

第二页:

public class CreationPage extends WizardNewFileCreationPage {
private static final String DEFAULT_EXTENSION = ".inte";//TODO extenção, alterara tb no shapes XML
private final IWorkbench workbench;

/**
 * Create a new wizard page instance.
 * 
 * @param workbench
 *            the current workbench
 * @param selection
 *            the current object selection
 * @see CopyOfShapesCreationWizard#init(IWorkbench, IStructuredSelection)
 */
CreationPage(IWorkbench workbench, IStructuredSelection selection) {
    super("shapeCreationPage1", selection);
    this.workbench = workbench;
    setTitle("Create a new " + DEFAULT_EXTENSION + " file");
    setDescription("Create a new " + DEFAULT_EXTENSION + " file");
}

/*
 * (non-Javadoc)
 * 
 * @see
 * org.eclipse.ui.dialogs.WizardNewFileCreationPage#createControl(org
 * .eclipse.swt.widgets.Composite)
 */
public void createControl(Composite parent) {
    super.createControl(parent);
    setFileName("Integrid1" + DEFAULT_EXTENSION);
    setPageComplete(validatePage());
}

/** Return a new ShapesDiagram instance. */
private Object createDefaultContent() {
    return new ShapesDiagram();
}

/**
 * This method will be invoked, when the "Finish" button is pressed.
 * 
 * @see CopyOfShapesCreationWizard#performFinish()
 */
boolean finish() {
    // create a new file, result != null if successful
    IFile newFile = createNewFile();

    // open newly created file in the editor
    IWorkbenchPage page = workbench.getActiveWorkbenchWindow().getActivePage();
    if (newFile != null && page != null) {
        try {
            IDE.openEditor(page, newFile, true);
            System.err.println();
        } catch (PartInitException e) {
            e.printStackTrace();
            return false;
        }
    }

    return true;
}

/*
 * (non-Javadoc)
 * 
 * @see
 * org.eclipse.ui.dialogs.WizardNewFileCreationPage#getInitialContents()
 */
protected InputStream getInitialContents() {

    ByteArrayInputStream bais = null;
    try {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(createDefaultContent()); // argument must be
                                                    // Serializable
        oos.flush();
        oos.close();
        bais = new ByteArrayInputStream(baos.toByteArray());
    } catch (IOException ioe) {
        ioe.printStackTrace();
    }
    return bais;
}

/**
 * Return true, if the file name entered in this page is valid.
 */
private boolean validateFilename() {
    if (getFileName() != null
            && getFileName().endsWith(DEFAULT_EXTENSION)) {
        return true;
    }
    setErrorMessage("The 'file' name must end with " + DEFAULT_EXTENSION);
    return false;
}

/*
 * (non-Javadoc)
 * 
 * @see org.eclipse.ui.dialogs.WizardNewFileCreationPage#validatePage()
 */
protected boolean validatePage() {
    return super.validatePage() && validateFilename();
}
}

Answer 1

一般来说，我会说最好在向导结束时完成 PerformFinish 方法中的所有工作，否则您必须处理第二页中的“后退”按钮的作用问题，以及用户可以取消向导，使项目只创建一半。

话虽如此，如果您确实希望在首页上创建项目，我会禁用“下一步”按钮:

setPageComplete(false);

然后在第一页添加一个“创建项目”按钮。单击该按钮后，您可以创建项目并启用“下一步”按钮。