Examples of org.eclipse.swt.widgets.Listener

org.eclipse.swt.widgets.Listener
Implementers of Listener provide a simple handleEvent() method that is used internally by SWT to dispatch events.
After creating an instance of a class that implements this interface it can be added to a widget using the addListener(int eventType, Listener handler) method and removed using the removeListener (int eventType, Listener handler) method. When the specified event occurs, handleEvent(...) will be sent to the instance.

Classes which implement this interface are described within SWT as providing the untyped listener API. Typically, widgets will also provide a higher-level typed listener API, that is based on the standard java.util.EventListener pattern.

Note that, since all internal SWT event dispatching is based on untyped listeners, it is simple to build subsets of SWT for use on memory constrained, small footprint devices, by removing the classes and methods which implement the typed listener API.
@see Widget#addListener @see java.util.EventListener @see org.eclipse.swt.events

//        layout.marginWidth= 2;
//        layout.horizontalSpacing= 0;
//        layout.verticalSpacing= 0;
//        _toolbarComposite.setLayout(layout);


        _toolbarComposite.addListener(SWT.Resize, new Listener() {
            public void handleEvent(Event event) {
                int height= _toolbarComposite.getClientArea().height;


                    Image image= createGradientImage(height, event.display);
                    _toolbarComposite.setBackgroundImage(image);

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        final ToolBar schemaSectionToolBar = new ToolBar(schemaSection, SWT.FLAT);
        final ToolItem schemaSectionItemNew = new ToolItem(schemaSectionToolBar, SWT.DROP_DOWN);
        schemaSectionItemNew.setText("new");
        schemaSectionItemNew.setImage(Plugin.getDefault().getImageRegistry().get(Plugin.IMAGE_SCHEMADEFINITION_ADD));
        schemaSectionItemNew.addListener(SWT.Selection, new Listener() {
            public void handleEvent(Event event) {


                  Rectangle rect = schemaSectionItemNew.getBounds();
                  Point pt = new Point(rect.x, rect.y + rect.height);
                  pt = schemaSectionToolBar.toDisplay(pt);

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    buddy_table.setLayoutData(grid_data);
    
    
    buddy_table.addListener(
      SWT.SetData,
      new Listener()
      {
        public void 
        handleEvent(
          Event event) 
        {
          TableItem item = (TableItem)event.item;
          
          int index = buddy_table.indexOf(item);
  
          if ( index < 0 || index >= participants.size()){
            
            return;
          }
          
          BuddyPluginAZ2.chatParticipant  participant = (BuddyPluginAZ2.chatParticipant)participants.get(index);
          
          BuddyPluginBuddy buddy = participant.getBuddy();
          
          if ( buddy == null ){
            
            item.setForeground( 0, Colors.red );
            
          }else if ( buddy.isOnline( false )){
            
            item.setForeground( 0, Colors.black );
            
          }else{
            
            item.setForeground( 0, Colors.grey );
          }
          
          item.setText(0, participant.getName());          
        }
      });
    
    
    
    
      // Text
    
    final Text text = new Text( shell, SWT.MULTI | SWT.V_SCROLL | SWT.WRAP | SWT.BORDER);
    grid_data = new GridData(GridData.FILL_HORIZONTAL );
    grid_data.horizontalSpan = 2;
    grid_data.heightHint = 50;
    text.setLayoutData(grid_data);
        
    text.addKeyListener(
      new KeyListener()
      {
        public void 
        keyPressed(
          KeyEvent e) 
        {
          if ( e.keyCode == SWT.CR ){
        
            e.doit = false;
            
            sendMessage( text.getText());
            
            text.setText( "" );
          }
        }
        
        public void 
        keyReleased(
          KeyEvent e ) 
        {
        }
      });
    
    text.setFocus();
    
    shell.addListener(
      SWT.Traverse, 
      new Listener() 
      {  
        public void 
        handleEvent(
          Event e ) 
        {

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      alt_method.setText(MessageText.getString("externalLogin.auth_method_proxy"));
      
      alt_method.setSelection( authMode == WebEngine.AM_PROXY );
      
      alt_method.addListener(SWT.Selection, new Listener() {
        public void handleEvent(Event arg0) {
  
          setCaptureMethod( browser, !f_alt_method.getSelection(), true );
        }
      });
    }
    
    setCaptureMethod( browser, authMode == WebEngine.AM_TRANSPARENT, true );
        
    Button cancel = new Button(shell,SWT.PUSH);
    cancel.setText(MessageText.getString("Button.cancel"));
    
    Button done = new Button(shell,SWT.PUSH);
    done.setText(MessageText.getString("Button.done"));
    
    cancel.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event arg0) {
        if(listener != null) {
          listener.canceled(ExternalLoginWindow.this);
        }
        shell.dispose();
      }
    });
    
    done.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event arg0) {
        if(listener != null) {
          listener.done(ExternalLoginWindow.this,cookiesToString());
        }
        shell.dispose();

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          }
        }
      }
    });
    
    drawCanvas.addListener(SWT.Resize, new Listener() {
      public void handleEvent(Event event) {
        drawChart(true);
      }
    });
  }

View Full Code Here

        };
        
        // Reuse the same label as defined for Azureus UI reset buttons.
        reset_button_holder[0] = new ButtonParameter(area, "ConfigView.section.style.colorOverrides.reset");
        reset_button_holder[0].getControl().setEnabled(color_param.isOverridden());
        reset_button_holder[0].getControl().addListener(SWT.Selection, new Listener(){
          public void handleEvent(Event event) {
            reset_button_holder[0].getControl().setEnabled(false);
            color_param.resetToDefault();
            color_param.reloadParamDataFromConfig(false);
          }

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      Button browse = new Button(pluginGroup, SWT.PUSH);
      ImageLoader.getInstance().setButtonImage(browse, getBrowseImageResource());
      browse.setToolTipText(MessageText.getString("ConfigView.button.browse"));


      browse.addListener(SWT.Selection, new Listener() {
        public void handleEvent(Event event) {
          String path = DirectoryParameter.this.openDialog(pluginGroup.getShell(), sp.getValue());
          if (path != null) {
            sp.setValue(path);
          }

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    sParamName = name;


    inputField = new Text(composite, SWT.BORDER);
    float value = COConfigurationManager.getFloatParameter(name);
    inputField.setText(String.valueOf(value));
    inputField.addListener(SWT.Verify, new Listener() {
      public void handleEvent(Event e) {
        String text = e.text;
        char[] chars = new char[text.length()];
        text.getChars(0, chars.length, chars, 0);
        for (int i = 0; i < chars.length; i++) {
          if ( !((chars[i] >= '0' && chars[i] <= '9') || chars[i] == '.') ) {
            e.doit = false;
            return;
          }
        }
      }
    });


    inputField.addListener(SWT.Modify, new Listener() {
      public void handleEvent(Event event) {
        try {
          float val = Float.parseFloat(inputField.getText());
          if (val < fMinValue) {
            if (!(allowZero && val == 0)) {
              val = fMinValue;
            }
          }
          if (val > fMaxValue) {
            if (fMaxValue > -1) {
              val = fMaxValue;
            }
          }
          COConfigurationManager.setParameter(name, val);
        }
        catch (Exception e) {}
      }
    });


    inputField.addListener(SWT.FocusOut, new Listener() {
      public void handleEvent(Event event) {
        try {
          float val = Float.parseFloat(inputField.getText());
          if (val < fMinValue) {
            if (!(allowZero && val == 0)) {

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    b = COConfigurationManager.getIntParameter(name+".blue",_b);
    updateButtonColor(composite.getDisplay(), r, g, b);


    COConfigurationManager.addParameterListener(sParamName, this);
    
    colorChooser.addListener(SWT.Dispose, new Listener() {
      public void handleEvent(Event e) {
        COConfigurationManager.removeParameterListener(sParamName, ColorParameter.this);
        if(img != null && ! img.isDisposed()) {
          img.dispose();          
        }
      }
    });


    colorChooser.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event e) {
        ColorDialog cd = new ColorDialog(composite.getShell());
        cd.setRGB(new RGB(r,g,b));
        RGB newColor = cd.open();
        if (newColor == null)

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    }
    int iDefaultValue = COConfigurationManager.getIntParameter(sConfigName);


    radioButton = new Button(composite, SWT.RADIO);
    radioButton.setSelection(iDefaultValue == iButtonValue);
    radioButton.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event event) {
        boolean selected = radioButton.getSelection();
        if (selected)
          COConfigurationManager.setParameter(sConfigName, iButtonValue);

View Full Code Here

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