codestory

Die Anleitung zu Eclipse JFace

  1. Was ist JFace ?
  2. Die Elemente JFace
  3. Das Projekt erstellen
  4. Resource Management
  5. Control Decoration benutzen
  6. JFace Viewer

1. Was ist JFace ?

Stellen Sie sicher, Sie die SWT kennen. Sie brauchen ein Project SWT erstellt vor dem Beginn mit Jface. Sie können die Hinweise SWT sehen bei.
Eclipse JFace ist eine API, die auf SWT basiert. JFace bietet die Class und die Grundlage um die Verwendung der SWT zu vereinfachen. JFace bedeckt die API SWT nicht. Deshalb ist die Kenntnisse SWT grundlegend und notwendig
JFace hilfe bei dem Vereinfachen:
  1. Die Datenmodelle und die visuelle Anzeige vereinfachen. Zum Beispiel wie Daten und Anzeige auf die Table, ComboBox, Tree.
  2. JFace bietet auch die Helper layer um die Resourcen ihres System effizient zu verwalten, wie die Farbe, die Image und de Font.
  3. JFace unterstützt bei der Steuerung der Reference page, wizard und die Dialog. Sie bietet auch die Funktion der dekorativen Symbole (icon decoration), die Unterstützung der user-input für die SWT control .
JFace wird in der Applikation von Desktop benutzt und ganz gut in der Applikation RAP verwendet. In diesem Dokument werden die Demos in der Applikation von Desktop geführt.

2. Die Elemente JFace

3. Das Projekt erstellen

Wir erstellen ein Project wie ein in der Dokument für die Gebrauchweise SWT erstellten Project
  • File/New/Project
  • Project name: JFaceTutorial
Dieses Project läuft auf dem Desktop, Sie sollen die Option wie folgend wählen
Geben Sie ein
  • Package name: org.o7planning.tutorial.jface
Ein Project wird erstellt
Sie sollen einige erforderlichen Bundle, nämlich die OSGi SWT und JFace. Sie sind die Bibliothek SWT & JFace.
Bundle hinzufügen:
  • org.eclipse.swt
Die Bundle einfügen
  • org.eclipse.jface
  • org.eclipse.jface.text
Nur wenn Sie 2 obengenannten bundle JFace ins Project hinzufügen, erscheint auf die Bildchirm von Window Builder die Elemente der JFace damit Sie ziehen und ablegen (Drag und Drop).
Nun beginnen wir mit JFace.

4. Resource Management

Eine Package erstellen:
  • org.o7planning.tutorial.jface.image
Und darin einigen Foto File kopieren.
  • check.png:
Sehen wir, wie SWT die Daten resource verwaltet (Image, Color, Font) und wie JFace verwaltet
  • File/New/Other...
Geben Sie ein
  • Package: org.o7planning.tutorial.jface.rs
  • Name: ResourceDemo
Wie manage SWT die Ressource
Zuerst sehen wir, wie SWT die Daten Resource verwaltet
Eine class SWTResourceManager wird automatisch erstellt. Das ist eine Class, die die Method für die Verwalltung der Image, Font, Color hat
Weitere Änderung der Schriftfarbe von Button:
Sehen Sie die in der class ResourceDemo erstellte Code
/**
* 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");
}
Wie führt JFace die Ressources
Und hier ist der Weg, wie JFace die Daten Ressource verwalten (Resource).
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);
Die Kode vom ResourceDemo.
ResourceDemo.java
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);
   }
}

5. Control Decoration benutzen

Decoration is a Widget used to decorate other Widgets in some situations. For example, to highlight a Text field requires input...
  • Package: org.o7planning.tutorial.jface.decoration
  • Name: DecorationDemo
DecorationDemo.java
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);
  }

}
Das Ergebnis vom Starten der class DecorationDemo:

6. JFace Viewer

SWT bietet einige control:
  • List
  • Combo
  • Table
  • Tree
Und die Benutzung ist wirklich schwierig und die Kodierung ist zu lang. Zum Beispiel : Bei der Umgang mit Table sollen Sie jede TableIntem in der Table bei der Daten Anzeige einfügen. Jede TableItem ist eine Zeile (row) von Table. Die Zusatz oder Verringerung der Zeile sind so ähnlich lang.
Der Grundsatz von JFace ist die Erstellung eines Viewer. Viewer packt die Control. So statt des Umgang mit Control arbeiten wir mit Viewer arbeiten. Viewer hilft Ihnen bei dem Verstecken der Daten Anzeige. Sie sollen nur Content Provider und Label Provider für die Viewer durch die method bieten
  • Viewer.setContentProvider(IContentProvider)
  • Viewer.setLabelProvider(IBaseLabelProvider)
Setzen Sie die Input Daten für die Control durch die method
  • Viewer.setInput(Object)
Davon
Content Provider:
  • Ist eine Implementierung der Interface IContentProvider, sie führt Viewer bei dem Gebrauch der Input Daten, Trennung der Daten ins Array von Object. Jedes Object ist eine Datenzeile (von Table, Tree, Combo oder List).
Label Provider:
  • Das ist die Implementierungclass der Interface IBaseLabelProvider. Sie informiert Viewer, welcher Image oder Text von der columnIndex angezogen werden.
Einige Klasse zur Teilnahme an Demo
Es gibt einige Class für die Teilnahme an der Beispiele im Dokument. Sie werden mehrmals benutzt.
Model:
AppMenu.java
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;
  }

}
Article.java
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;
  }

}
Employee.java
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;
  }
}
Department.java
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;
  }

}
DataModel.java
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;
  }

}
Content/Label Provider:
AbstractComboContentLabelProvider.java
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;
  }
}
AbstractTableContentLabelProvider.java
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;
  }

}
AbstractTreeContentLabelProvider.java
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;
  }

}
AbstractTreeTableContentLabelProvider.java
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;
  }

}
JFace TableViewer
Mit TableViewer. sollen wir Content/Label Provider ... benutzen
  • Content Provider: implements IStructuredContentProvider
  • Label Provider: implements ITableLabelProvider
  • File/New/Other...
Geben Sie ein
  • Package: org.o7planning.tutorial.jface.tableviewer1
  • Name: TableViewerDemo
  • Select: protected createContents() method
    • (The code will be generated in this method).
Das Layout als FillLayout für das Objekt shell einstellen durch der Auswahl des Symbol FillLayout und Klicken auf dem Bildschirm Shell.
Erstellen Sie 2 Spalte für die Table durch das Wählen der Symbole TableColumn und Ablegen in das Bildschirm. Gleichzeitig ändern Sie die Titel der Spalte wie folgend
Die Klasse ArticleTableCLProvider verlängert aus der Klasse AbstractTableContentLabelProvider, sie hat die Funktion von Content Provider und Label Provider.
ArticleTableCLProvider.java
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();
    }

}
Die Code von der class TableViewerDemo öffnen, um die zusätzliche Code zu addieren
//
ArticleTableCLProvider provider = new ArticleTableCLProvider();        
tableViewer.setContentProvider(provider);        
tableViewer.setLabelProvider(provider);  

// Set InputData for TableViewer.
List<Article> articleList= DataModel.getArticles();
tableViewer.setInput(articleList);
Wie das folgende Image
Und hier ist das Ergebnis vom Starten der class TableViewerDemo:
Die ganze Code von TableViewerDemo:
TableViewerDemo.java
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);

    }

}
In der Fall von dem Zusatz und Verringerung der Daten in der Table.
// 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();
JFace Tree Table Viewer
Mit TreeViewer wird die Daten als Tree und ebenso als Table angezeigt. Content/Label Provider soll benutzt werden:
  • Content Provider: implements ITreeContentProvider
  • Label Provider: implements ITableLabelProvider
Das Beispiel
DeptEmpTreeTableCLProvider.java
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;
         }
     }
 }

}
Die Code von TreeTableViewerDemo korrigieren
Die ganzen Code der Klasse TreeTableViewerDemo sehen:
TreeTableViewerDemo.java
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());
  }

}
Das Ergebnis vom Beispiel
Die Daten im TreeViewer zusätzen, löschen
// 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.
JFace TreeViewer
Mit TreeViewer zeigt der Daten auch ein Tree auch eine Table an. Content/Label Provider sollen wir benutzen ...
  • Content Provider: implements ITreeContentProvider
  • Label Provider: implements ITableLabelProvider
In dem Fall von Tree (Eine Spalte und Nicht-table):
  • Content Provider: implements ITreeContentProvider
  • Label Provider: implements ILabelProvider

Achtung: Die Interface ITableLabelProvider verlangert aus der Interface ILabelProvider

Das Beispiel
Sie können ein TreeColumn ins Tree zusätzen oder keine TreeColumn. In das folgende Beispiel benutze ich Tree ohne TreeColumn
In einem Tree mit Column können Sie einen Titel für die Spalte setzen aber es ist nicht notwendig in einigen Fällen
AppMenuTreeCLProvider.java
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();
  }

}
TreeViewerDemo.java
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());
  }
}
Das Ergebnis der Beispielsdurchführung
Die Daten auf TreeViewer einfügen, löschen
// 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.
JFace CheckboxTableViewer
  • Package: org.o7planning.tutorial.jface.cbtableviewer
  • Name: CheckboxTableViewerDemo
  • TODO...

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