Руководство Eclipse JFace

/**
* Create contents of the window.
*/
protected void createContents() {
   shlResourceDemo = new Shell();
   shlResourceDemo.setSize(336, 249);
   shlResourceDemo.setText("Resource Demo");
   shlResourceDemo.setLayout(new RowLayout(SWT.HORIZONTAL));
   
   Button btnButtonU = new Button(shlResourceDemo, SWT.NONE);
   btnButtonU.setFont(SWTResourceManager.getFont("Arial", 12, SWT.NORMAL));
   btnButtonU.setForeground(SWTResourceManager.getColor(SWT.COLOR_BLUE));
   btnButtonU.setImage(SWTResourceManager.getImage(ResourceDemo.class, "/org/o7planning/tutorial/jface/image/check.png"));
   btnButtonU.setText("Button using SWT Resource Manager");
}

import org.eclipse.jface.resource.FontDescriptor;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.LocalResourceManager;


// Create Resource Manager.
LocalResourceManager jfaceRsManager = new LocalResourceManager(
       JFaceResources.getResources(), shlResourceDemo);


Color color = jfaceRsManager.createColor(new RGB(200, 100, 0));
Font font = jfaceRsManager.createFont(FontDescriptor.createFrom(
       "Arial", 10, SWT.BOLD));

// Class in arguments, and image file is located on same Jar file.
ImageDescriptor imageDescriptor = ImageDescriptor.createFromFile(
       ResourceDemo.class,
       "/org/o7planning/tutorial/jface/image/check.png");

Image image = jfaceRsManager.createImage(imageDescriptor);

package org.o7planning.tutorial.jface.rs;

import org.eclipse.jface.resource.FontDescriptor;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.LocalResourceManager;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.wb.swt.SWTResourceManager;

public class ResourceDemo {

   protected Shell shlResourceDemo;

   /**
    * Launch the application.
    *
    * @param args
    */
   public static void main(String[] args) {
       try {
           ResourceDemo window = new ResourceDemo();
           window.open();
       } catch (Exception e) {
           e.printStackTrace();
       }
   }

   /**
    * Open the window.
    */
   public void open() {
       Display display = Display.getDefault();
       createContents();
       shlResourceDemo.open();
       shlResourceDemo.layout();
       while (!shlResourceDemo.isDisposed()) {
           if (!display.readAndDispatch()) {
               display.sleep();
           }
       }
   }

   /**
    * Create contents of the window.
    */
   protected void createContents() {
       shlResourceDemo = new Shell();
       shlResourceDemo.setSize(336, 249);
       shlResourceDemo.setText("Resource Demo");
       shlResourceDemo.setLayout(new RowLayout(SWT.HORIZONTAL));

       Button btnButtonU = new Button(shlResourceDemo, SWT.NONE);
       btnButtonU.setFont(SWTResourceManager.getFont("Arial", 12, SWT.NORMAL));
       btnButtonU.setForeground(SWTResourceManager.getColor(SWT.COLOR_BLUE));
       btnButtonU.setImage(SWTResourceManager.getImage(ResourceDemo.class,
               "/org/o7planning/tutorial/jface/image/check.png"));
       btnButtonU.setText("Button using SWT Resource Manager");

       //

       Button button2 = new Button(shlResourceDemo, SWT.NONE);
       button2.setText("Button using JFace Resource Manager");

       LocalResourceManager jfaceRsManager = new LocalResourceManager(
               JFaceResources.getResources(), shlResourceDemo);

      
       Color color = jfaceRsManager.createColor(new RGB(200, 100, 0));
       Font font = jfaceRsManager.createFont(FontDescriptor.createFrom(
               "Arial", 10, SWT.BOLD));
      
       ImageDescriptor imageDescriptor = ImageDescriptor.createFromFile(
               ResourceDemo.class,
               "/org/o7planning/tutorial/jface/image/check.png");
       Image image = jfaceRsManager.createImage(imageDescriptor);

       button2.setFont(font);
       button2.setForeground(color);
       button2.setImage(image);
   }
}

package org.o7planning.tutorial.jface.decoration;

import org.eclipse.jface.fieldassist.ControlDecoration;
import org.eclipse.jface.fieldassist.FieldDecorationRegistry;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

import swing2swt.layout.FlowLayout;

public class DecorationDemo {

  protected Shell shlDecorationDemo;
  private Text text;

  /**
   * Launch the application.
   * @param args
   */
  public static void main(String[] args) {
      try {
          DecorationDemo window = new DecorationDemo();
          window.open();
      } catch (Exception e) {
          e.printStackTrace();
      }
  }

  /**
   * Open the window.
   */
  public void open() {
      Display display = Display.getDefault();
      createContents();
      shlDecorationDemo.open();
      shlDecorationDemo.layout();
      while (!shlDecorationDemo.isDisposed()) {
          if (!display.readAndDispatch()) {
              display.sleep();
          }
      }
  }

  /**
   * Create contents of the window.
   */
  protected void createContents() {
      shlDecorationDemo = new Shell();
      shlDecorationDemo.setSize(327, 245);
      shlDecorationDemo.setText("Decoration Demo");
      shlDecorationDemo.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
     
      text = new Text(shlDecorationDemo, SWT.BORDER);
     
      ControlDecoration controlDecoration = new ControlDecoration(text, SWT.LEFT | SWT.TOP);
     
      controlDecoration.setDescriptionText("Some description");
     
      Image image = FieldDecorationRegistry.
                getDefault().
                getFieldDecoration(FieldDecorationRegistry.DEC_ERROR_QUICKFIX).
                getImage();
     
      controlDecoration.setImage(image);
  }

}

package org.o7planning.tutorial.jface.model;

import java.util.List;

public class AppMenu {

  private String menuName;
  private String menuTitle;
  private List<AppMenu> children;

  public AppMenu(String menuName, String menuTitle, List<AppMenu> children) {
      this.menuName = menuName;
      this.menuTitle = menuTitle;
      this.children = children;
  }

  public String getMenuName() {
      return menuName;
  }

  public void setMenuName(String menuName) {
      this.menuName = menuName;
  }

  public String getMenuTitle() {
      return menuTitle;
  }

  public void setMenuTitle(String menuTitle) {
      this.menuTitle = menuTitle;
  }

  public List<AppMenu> getChildren() {
      return children;
  }

}

package org.o7planning.tutorial.jface.model;

public class Article {

  private String title;
  private String author;
  private boolean published;

  public Article(String title, String author, boolean published) {
      this.title = title;
      this.author = author;
      this.published = published;
  }

  public String getTitle() {
      return title;
  }

  public void setTitle(String title) {
      this.title = title;
  }

  public String getAuthor() {
      return author;
  }

  public void setAuthor(String author) {
      this.author = author;
  }

  public boolean isPublished() {
      return published;
  }

  public void setPublished(boolean published) {
      this.published = published;
  }

}

package org.o7planning.tutorial.jface.model;

public class Employee {

  private String empNo;
  private String firstName;
  private String lastName;

  public Employee(String empNo, String firstName, String lastName) {
      this.empNo = empNo;
      this.firstName = firstName;
      this.lastName = lastName;
  }

  public String getEmpNo() {
      return empNo;
  }

  public void setEmpNo(String empNo) {
      this.empNo = empNo;
  }

  public String getFirstName() {
      return firstName;
  }

  public void setFirstName(String firstName) {
      this.firstName = firstName;
  }

  public String getLastName() {
      return lastName;
  }

  public void setLastName(String lastName) {
      this.lastName = lastName;
  }
}

package org.o7planning.tutorial.jface.model;

import java.util.List;

public class Department {

  private String deptNo;
  private String deptName;
  private List<Employee> employees;

  public Department(String deptNo, String deptName, List<Employee> employees) {
      this.deptNo = deptNo;
      this.deptName = deptName;
      this.employees = employees;
  }

  public String getDeptNo() {
      return deptNo;
  }

  public void setDeptNo(String deptNo) {
      this.deptNo = deptNo;
  }

  public String getDeptName() {
      return deptName;
  }

  public void setDeptName(String deptName) {
      this.deptName = deptName;
  }

  public List<Employee> getEmployees() {
      return employees;
  }

}

package org.o7planning.tutorial.jface.model;

import java.util.ArrayList;
import java.util.List;

public class DataModel {

  private static List<Article> articleList;
  private static List<Department> departmentList;
  private static List<AppMenu> appMenuList;

  public static List<Article> getArticles() {
      if (articleList == null) {
          articleList = new ArrayList<Article>();
          articleList.add(new Article("Java basic", "Tom", true));
          articleList
                  .add(new Article("Hibernate for beginners", "Tran", true));
          articleList.add(new Article("Maven for beginners", "Smith", false));
      }
      return articleList;
  }

  public static List<Department> getDepartments() {
      if (departmentList == null) {

          Employee emp11 = new Employee("E11", "Michael", "Smith");
          Employee emp12 = new Employee("E12", "Susan", "Barker");
          List<Employee> empList1 = new ArrayList<Employee>();
          empList1.add(emp11);
          empList1.add(emp12);

          Department dept1 = new Department("D01", "Operation", empList1);
          //
          Employee emp21 = new Employee("E21", "Robert", "Tyler");
          List<Employee> empList2 = new ArrayList<Employee>();
          empList2.add(emp21);

          Department dept2 = new Department("D02", "Adminstration", empList2);
          //
          departmentList = new ArrayList<Department>();

          departmentList.add(dept1);
          departmentList.add(dept2);
      }
      return departmentList;
  }

  public static List<AppMenu> getAppMenus() {
      if (appMenuList == null) {
          appMenuList = new ArrayList<AppMenu>();

          AppMenu appMenu31 = new AppMenu("ErrorLog", "Error Log", null);
          AppMenu appMenu32 = new AppMenu("ProjectExplorer",
                  "Project Explorer", null);

          List<AppMenu> list3 = new ArrayList<AppMenu>();
          list3.add(appMenu31);
          list3.add(appMenu32);

          AppMenu appMenu21 = new AppMenu("ShowView", "Show View", list3);
          AppMenu appMenu22 = new AppMenu("ClosePerspective",
                  "Close perspective...", null);
          List<AppMenu> list2 = new ArrayList<AppMenu>();
          list2.add(appMenu21);
          list2.add(appMenu22);

          AppMenu appMenu1 = new AppMenu("Window", "Window", list2);

          appMenuList.add(appMenu1);
      }
      return appMenuList;
  }

}

package org.o7planning.tutorial.jface.provider;

import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.graphics.Image;

public abstract class AbstractComboContentLabelProvider implements
      IStructuredContentProvider, ILabelProvider {

  @Override
  public void dispose() {

  }

  @Override
  public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

  }

  @Override
  public void addListener(ILabelProviderListener listener) {
  }

  @Override
  public boolean isLabelProperty(Object element, String property) {
      return false;
  }

  @Override
  public void removeListener(ILabelProviderListener listener) {

  }

  @Override
  public Image getImage(Object element) {
      return null;
  }
}

package org.o7planning.tutorial.jface.provider;

import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.graphics.Image;

public abstract class AbstractTableContentLabelProvider implements
      ITableLabelProvider, IStructuredContentProvider {

  @Override
  public void dispose() {

  }

  @Override
  public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

  }

  @Override
  public void addListener(ILabelProviderListener listener) {

  }

  @Override
  public boolean isLabelProperty(Object element, String property) {
      return false;
  }

  @Override
  public void removeListener(ILabelProviderListener listener) {

  }

  @Override
  public Image getColumnImage(Object element, int columnIndex) {
      return null;
  }

}

package org.o7planning.tutorial.jface.provider;

import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.graphics.Image;

public abstract class AbstractTreeContentLabelProvider implements
      ITreeContentProvider, ILabelProvider {

  @Override
  public void dispose() {

  }

  @Override
  public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

  }

  @Override
  public Object getParent(Object element) {
      return null;
  }

  @Override
  public void addListener(ILabelProviderListener listener) {

  }

  @Override
  public boolean isLabelProperty(Object element, String property) {
      return false;
  }

  @Override
  public void removeListener(ILabelProviderListener listener) {
  }

  @Override
  public Image getImage(Object element) {
      return null;
  }

}

package org.o7planning.tutorial.jface.provider;

import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.graphics.Image;

public abstract class AbstractTreeTableContentLabelProvider implements
      ITreeContentProvider, ITableLabelProvider {

  @Override
  public void dispose() {
  }

  @Override
  public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
  }

  @Override
  public void addListener(ILabelProviderListener listener) {
  }

  @Override
  public boolean isLabelProperty(Object element, String property) {
      return false;
  }

  @Override
  public void removeListener(ILabelProviderListener listener) {
  }

  @Override
  public Image getColumnImage(Object element, int columnIndex) {
      return null;
  }

  @Override
  public Object getParent(Object element) {
      return null;
  }

}

package org.o7planning.tutorial.jface.tableviewer1;

import java.util.List;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.LocalResourceManager;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.o7planning.tutorial.jface.model.Article;
import org.o7planning.tutorial.jface.provider.AbstractTableContentLabelProvider;

public class ArticleTableCLProvider extends AbstractTableContentLabelProvider {

    private Image image;

    public ArticleTableCLProvider() {
        LocalResourceManager jfaceRsManager = new LocalResourceManager(
                JFaceResources.getResources(),
                Display.getCurrent().getShells()[0]);

        ImageDescriptor imageDescriptor = ImageDescriptor.createFromFile(
                ArticleTableCLProvider.class,
                "/org/o7planning/tutorial/jface/image/check.png");
        image = jfaceRsManager.createImage(imageDescriptor);
    }

    @Override
    public String getColumnText(Object element, int columnIndex) {
        Article article = (Article) element;
        switch (columnIndex) {

         // 0 - For first column
        case 0:
            return article.getTitle();
 
        // 1 - For Second column
        case 1:
            return article.getAuthor();
        default:
            return null;
        }
    }

    @Override
    public Image getColumnImage(Object element, int columnIndex) {
        Article article = (Article) element;
        switch (columnIndex) {
 
        // 0 - For first column
        case 0:
            if (article.isPublished()) {
                return image;
            }
        default:
            return null;
        }
    }

 
    // see: viewer.setInput(..)
    @Override
    public Object[] getElements(Object input) {
        List<Article> list = (List<Article>) input;
        return list.toArray();
    }

}

//
ArticleTableCLProvider provider = new ArticleTableCLProvider();        
tableViewer.setContentProvider(provider);        
tableViewer.setLabelProvider(provider);  

// Set InputData for TableViewer.
List<Article> articleList= DataModel.getArticles();
tableViewer.setInput(articleList);

package org.o7planning.tutorial.jface.tableviewer1;

import java.util.List;

public class TableViewerDemo {

    protected Shell shlTableviewerdemo;
    private Table table;

    /**
     * Launch the application.
     * @param args
     */
    public static void main(String[] args) {
        try {
            TableViewerDemo window = new TableViewerDemo();
            window.open();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Open the window.
     */
    public void open() {
        Display display = Display.getDefault();
        createContents();
        shlTableviewerdemo.open();
        shlTableviewerdemo.layout();
        while (!shlTableviewerdemo.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
    }

    /**
     * Create contents of the window.
     */
    protected void createContents() {
        shlTableviewerdemo = new Shell();
        shlTableviewerdemo.setSize(366, 277);
        shlTableviewerdemo.setText("TableViewerDemo");
        shlTableviewerdemo.setLayout(new FillLayout(SWT.HORIZONTAL));
        
        TableViewer tableViewer = new TableViewer(shlTableviewerdemo, SWT.BORDER | SWT.FULL_SELECTION);        
        
        // Content Provider & Label Provider.
        ArticleTableCLProvider provider = new ArticleTableCLProvider();        
        tableViewer.setContentProvider(provider);        
        tableViewer.setLabelProvider(provider);        
        
        table = tableViewer.getTable();
        table.setLinesVisible(true);
        table.setHeaderVisible(true);
        
        TableColumn tblclmnNewColumn = new TableColumn(table, SWT.NONE);
        tblclmnNewColumn.setWidth(148);
        tblclmnNewColumn.setText("Article");
        
        TableColumn tblclmnNewColumn_1 = new TableColumn(table, SWT.NONE);
        tblclmnNewColumn_1.setWidth(119);
        tblclmnNewColumn_1.setText("Author");
        
        // Set input data to TableViewer
        List<Article> articleList= DataModel.getArticles();
        tableViewer.setInput(articleList);

    }

}

// Get TableViewer data.
List<Article> input = (List<Article>)tableViewer.getInput();

// Add row
Article newArticle = .... ;
input.add(newArticle);

// Refresh row
tableViewer.refresh(newArticle);
// Or
tableViewer.refresh();

// remove row
input.remove(<article>);

tableViewer.refresh();

package org.o7planning.tutorial.jface.treetable1;

import java.util.List;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.o7planning.tutorial.jface.model.Department;
import org.o7planning.tutorial.jface.model.Employee;
import org.o7planning.tutorial.jface.provider.AbstractTreeTableContentLabelProvider;

public class DeptEmpTreeTableCLProvider extends
     AbstractTreeTableContentLabelProvider {

 private Image EMP_IMAGE;
 private Image DEPT_IMAGE;

 public DeptEmpTreeTableCLProvider() {
    // Dùng tạm ảnh của có sẵn trong hệ thống để minh họa
   
     DEPT_IMAGE = Display.getCurrent().getSystemImage(SWT.ICON_INFORMATION);
   
     EMP_IMAGE = Display.getCurrent().getSystemImage(SWT.ICON_ERROR  );
 }

 @Override
 public Object[] getElements(Object inputElement) {
     List<Department> departments = (List<Department>) inputElement;
     return departments.toArray();
 }

 @Override
 public Object[] getChildren(Object parentElement) {
     if (parentElement instanceof Department) {
         Department dept = (Department) parentElement;
         List<Employee> emps = dept.getEmployees();
         return emps == null ? null : emps.toArray();
     } else {
         // Employee has no children
         return null;
     }
 }

 @Override
 public boolean hasChildren(Object element) {
     if (element instanceof Department) {
         Department dept = (Department) element;
         List<Employee> emps = dept.getEmployees();
         return emps != null && !emps.isEmpty();
     } else {
         // Employee has no children
         return false;
     }
 }

 @Override
 public String getColumnText(Object element, int columnIndex) {
     if (element instanceof Department) {
         Department dept = (Department) element;
         switch (columnIndex) {
         case 0:
             return dept.getDeptNo();
         case 1:
             return dept.getDeptName();
         default:
             return null;
         }
     } else {
         Employee emp = (Employee) element;
         switch (columnIndex) {
         case 2:
             return emp.getEmpNo();
         case 3:
             return emp.getFirstName();
         case 4:
             return emp.getLastName();
         default:
             return null;
         }
     }
 }

 @Override
 public Image getColumnImage(Object element, int columnIndex) {
     if (element instanceof Department) {
         switch (columnIndex) {
         case 0:
             return DEPT_IMAGE;
         default:
             return null;
         }
     } else {
         switch (columnIndex) {
         case 2:
             return EMP_IMAGE;
         default:
             return null;
         }
     }
 }

}

package org.o7planning.tutorial.jface.treetable1;

import org.eclipse.swt.widgets.Display;

public class TreeTableViewerDemo {

  protected Shell shlTreeTableViewer;

  /**
   * Launch the application.
   * @param args
   */
  public static void main(String[] args) {
      try {
          TreeTableViewerDemo window = new TreeTableViewerDemo();
          window.open();
      } catch (Exception e) {
          e.printStackTrace();
      }
  }

  /**
   * Open the window.
   */
  public void open() {
      Display display = Display.getDefault();
      createContents();
      shlTreeTableViewer.open();
      shlTreeTableViewer.layout();
      while (!shlTreeTableViewer.isDisposed()) {
          if (!display.readAndDispatch()) {
              display.sleep();
          }
      }
  }

  /**
   * Create contents of the window.
   */
  protected void createContents() {
      shlTreeTableViewer = new Shell();
      shlTreeTableViewer.setSize(438, 226);
      shlTreeTableViewer.setText("Tree Table Viewer");
      shlTreeTableViewer.setLayout(new FillLayout(SWT.HORIZONTAL));
     
      TreeViewer treeViewer = new TreeViewer(shlTreeTableViewer, SWT.BORDER);
     
      DeptEmpTreeTableCLProvider provider= new DeptEmpTreeTableCLProvider();
      treeViewer.setContentProvider(provider);
      treeViewer.setLabelProvider(provider);
             
      Tree tree = treeViewer.getTree();
      tree.setLinesVisible(true);
      tree.setHeaderVisible(true);
     
      TreeColumn trclmnDeptNo = new TreeColumn(tree, SWT.NONE);
      trclmnDeptNo.setWidth(71);
      trclmnDeptNo.setText("Dept No");
     
      TreeColumn trclmnDeptName = new TreeColumn(tree, SWT.NONE);
      trclmnDeptName.setWidth(79);
      trclmnDeptName.setText("Dept Name");
     
      TreeColumn trclmnEmpNo = new TreeColumn(tree, SWT.NONE);
      trclmnEmpNo.setWidth(69);
      trclmnEmpNo.setText("Emp No");
     
      TreeColumn trclmnFirstName = new TreeColumn(tree, SWT.NONE);
      trclmnFirstName.setWidth(77);
      trclmnFirstName.setText("First Name");
     
      TreeColumn trclmnLastName = new TreeColumn(tree, SWT.NONE);
      trclmnLastName.setWidth(100);
      trclmnLastName.setText("Last Name");
     
      treeViewer.setInput(DataModel.getDepartments());
  }

}

// Get data of TreeViewer.
List<Department> input = (List<Department>)treeViewer.getInput();

Department dept =  input.get(0);
List<Employee> empList  = dept.getEmployees();

// Add employee for Department.
empList.add(newEmployee);

// Refresh
treeViewer.refresh(dept);
// or
treeViewer.refresh();

// Remove row similar.

package org.o7planning.tutorial.jface.treeviewer1;

import java.util.List;

import org.o7planning.tutorial.jface.model.AppMenu;
import org.o7planning.tutorial.jface.provider.AbstractTreeContentLabelProvider;

public class AppMenuTreeCLProvider extends AbstractTreeContentLabelProvider {

  @Override
  public String getText(Object element) {
      AppMenu appMenu= (AppMenu) element;
      return appMenu.getMenuTitle();
  }

  @Override
  public Object[] getElements(Object inputElement) {
      List<AppMenu> menus = (List<AppMenu>) inputElement;
      return menus.toArray();
  }

  @Override
  public Object[] getChildren(Object parentElement) {
       AppMenu menu= (AppMenu) parentElement;
       List<AppMenu> children= menu.getChildren();
       return children== null? null: children.toArray();
  }

  @Override
  public boolean hasChildren(Object element) {
       AppMenu menu= (AppMenu) element;
       List<AppMenu> children= menu.getChildren();
       return children!= null&&!children.isEmpty();
  }

}

package org.o7planning.tutorial.jface.treeviewer1;

import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.o7planning.tutorial.jface.model.DataModel;

public class TreeViewerDemo {

  protected Shell shlTreeviewerDemo;

  /**
   * Launch the application.
   * @param args
   */
  public static void main(String[] args) {
      try {
          TreeViewerDemo window = new TreeViewerDemo();
          window.open();
      } catch (Exception e) {
          e.printStackTrace();
      }
  }

  /**
   * Open the window.
   */
  public void open() {
      Display display = Display.getDefault();
      createContents();
      shlTreeviewerDemo.open();
      shlTreeviewerDemo.layout();
      while (!shlTreeviewerDemo.isDisposed()) {
          if (!display.readAndDispatch()) {
              display.sleep();
          }
      }
  }

  /**
   * Create contents of the window.
   */
  protected void createContents() {
      shlTreeviewerDemo = new Shell();
      shlTreeviewerDemo.setSize(246, 202);
      shlTreeviewerDemo.setText("TreeViewer Demo");
      shlTreeviewerDemo.setLayout(new FillLayout(SWT.HORIZONTAL));
     
      TreeViewer treeViewer = new TreeViewer(shlTreeviewerDemo, SWT.BORDER);
     
      AppMenuTreeCLProvider provider= new AppMenuTreeCLProvider();
      treeViewer.setContentProvider(provider);
      treeViewer.setLabelProvider(provider);
     
      Tree tree = treeViewer.getTree();
      tree.setLinesVisible(true);
      tree.setHeaderVisible(true);
     
      treeViewer.setInput(DataModel.getAppMenus());
  }
}

// Get data of TreeViewer.
List<AppMenu> input = (List<AppMenu>)treeViewer.getInput();

AppMenu menu =  input.get(0);
List<AppMenu> childMenus = menu.getChildren();

// add AppMenu
childMenus .add(newAppMenu);

// Refresh
treeViewer.refresh(menu );
// or
treeViewer.refresh();

// Remove row similar.