Programmieren der Java Desktop-Anwendung mit SWT

Display display = new Display();
Shell shell = new Shell(display);
shell.open();

// run the event loop as long as the window is open
while (!shell.isDisposed()) {
   // read the next OS event queue and transfer it to a SWT event
 if (!display.readAndDispatch())
  {
 // if there are currently no other OS event to process
 // sleep until the next OS event is available
   display.sleep();
  }
}

// disposes all associated windows and their components
display.dispose();

package org.o7planning.tutorial.swt.helloswt;

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class HelloSWT {

  public static void main(String[] args) {
      // Create Display
      Display display = new Display();
      // Create Shell (Window) from diplay
      Shell shell = new Shell(display);

      shell.open();

      while (!shell.isDisposed()) {
          if (!display.readAndDispatch())
              display.sleep();
      }
      display.dispose();
  }
}

FillLayout fillLayout = new FillLayout();
fillLayout.type = SWT.VERTICAL;
shell.setLayout(fillLayout);

package org.o7planning.tutorial.swt.layout;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class FillLayoutExample {

  public static void main(String[] args) {
      Display display = new Display();
      final Shell shell = new Shell(display);
      shell.setLayout(new FillLayout());

      //
      Composite parent = new Composite(shell, SWT.NONE);
     
      FillLayout fillLayout= new FillLayout();
      fillLayout.type= SWT.VERTICAL;
     
      parent.setLayout(fillLayout);

      Button b1 = new Button(parent, SWT.NONE);
      b1.setText("B1");

      Button b2 = new Button(parent, SWT.NONE);
      b2.setText("B2");

      Button button3 = new Button(parent, SWT.NONE);
      button3.setText("Button 3");
     
      // Windows back to natural size.
      shell.pack();
      //
      shell.open();
      while (!shell.isDisposed()) {
          if (!display.readAndDispatch())
              display.sleep();
      }
      // tear down the SWT window
      display.dispose();
  }
}

package org.o7planning.tutorial.swt.swtsubclass;

import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;

public class MyButton extends Button {

   public MyButton(Composite parent, int style) {
       super(parent, style);
   }

   // You have to override this method.
   @Override
   protected void checkSubclass() {
       // No need to do anything.
   }

   
}

package org.o7planning.tutorial.swt.module;

import org.eclipse.swt.widgets.Composite;

public class TopComposite extends Composite {
  private Text text;

  /**
   * Create the composite.
   * @param parent
   * @param style
   */
  public TopComposite(Composite parent, int style) {
      super(parent, style);
      setLayout(new FillLayout(SWT.HORIZONTAL));
     
      Composite composite = new Composite(this, SWT.NONE);
      composite.setLayout(new GridLayout(1, false));
     
      Button btnPreferredSite = new Button(composite, SWT.CHECK);
      btnPreferredSite.setText("Preferred Site");
     
      Label lblColumnWidth = new Label(composite, SWT.NONE);
      lblColumnWidth.setText("Column width");
     
      text = new Text(composite, SWT.BORDER);
      text.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));

  }

  @Override
  protected void checkSubclass() {
  }
}

package org.o7planning.tutorial.swt.module;

import org.eclipse.swt.SWT;

public class BottomComposite extends Composite {
  private Text text;

  /**
   * Create the composite.
   * @param parent
   * @param style
   */
  public BottomComposite(Composite parent, int style) {
      super(parent, style);
      setLayout(new FillLayout(SWT.HORIZONTAL));
     
      Composite composite = new Composite(this, SWT.NONE);
      composite.setLayout(new GridLayout(1, false));
     
      Composite composite_1 = new Composite(composite, SWT.NONE);
      GridLayout gl_composite_1 = new GridLayout(3, false);
      gl_composite_1.marginHeight = 0;
      gl_composite_1.marginWidth = 0;
      composite_1.setLayout(gl_composite_1);
      composite_1.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
     
      Button btnNewButton = new Button(composite_1, SWT.NONE);
      btnNewButton.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
      btnNewButton.setText("Add");
     
      Button btnNewButton_1 = new Button(composite_1, SWT.NONE);
      btnNewButton_1.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
      btnNewButton_1.setText("Delete");
     
      Button btnNewButton_2 = new Button(composite_1, SWT.NONE);
      btnNewButton_2.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
      btnNewButton_2.setText("Clear");
     
      text = new Text(composite, SWT.BORDER | SWT.MULTI);
      text.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));

  }

  @Override
  protected void checkSubclass() {
      // Disable the check that prevents subclassing of SWT components
  }

}

package org.o7planning.tutorial.swt.module;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;

public class MainComposite extends Composite {

  /**
   * Create the composite.
   * @param parent
   * @param style
   */
  public MainComposite(Composite parent, int style) {
      super(parent, style);
      setLayout(new FillLayout(SWT.HORIZONTAL));
     
      Composite composite = new Composite(this, SWT.NONE);
      composite.setLayout(new GridLayout(1, false));
     
      TopComposite topComposite = new TopComposite(composite, SWT.BORDER);
      topComposite.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
     
      BottomComposite bottomComposite = new BottomComposite(composite, SWT.BORDER);
      bottomComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));

  }

  @Override
  protected void checkSubclass() {
  }

}

btnClickToMe.addSelectionListener(new SelectionAdapter() {
    @Override
    public void widgetSelected(SelectionEvent e) {
        // Sử lý sự kiện Button được chọn tại đây.
        System.out.println("Button selected!");
    }
});

package org.o7planning.tutorial.swt.event1;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class ButtonEventDemo {

  protected Shell shlButtonEventDemo;

  public static void main(String[] args) {
      try {
          ButtonEventDemo window = new ButtonEventDemo();
          window.open();
      } catch (Exception e) {
          e.printStackTrace();
      }
  }

  public void open() {
      Display display = Display.getDefault();
      createContents();
      shlButtonEventDemo.open();
      shlButtonEventDemo.layout();
      while (!shlButtonEventDemo.isDisposed()) {
          if (!display.readAndDispatch()) {
              display.sleep();
          }
      }
  }

  protected void createContents() {
      shlButtonEventDemo = new Shell();
      shlButtonEventDemo.setSize(296, 205);
      shlButtonEventDemo.setText("Button Event Demo");
      shlButtonEventDemo.setLayout(new RowLayout(SWT.HORIZONTAL));

      Button btnClickToMe = new Button(shlButtonEventDemo, SWT.NONE);
      btnClickToMe.addSelectionListener(new SelectionAdapter() {
          @Override
          public void widgetSelected(SelectionEvent e) {
              // Handle Button selected here!
              System.out.println("Button selected!");
          }
      });
      btnClickToMe.setText("Click to me");

  }

}