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

    colDetails.setWidth(300);
    colDetails.setResizable(false);
    
    
    activityTable.setHeaderVisible(true);
    Listener computeLastRowWidthListener = new Listener() {
      // inUse flag to prevent a SWT stack overflow.  For some reason
      // the setWidth call was triggering a resize.
      boolean inUse = false;
      public void handleEvent(Event event) {
        if (inUse) {
          return;
        }


        inUse = true;
         try {
          if(activityTable == null || activityTable.isDisposed()) return;
          int totalWidth = activityTable.getClientArea().width;
          int remainingWidth = totalWidth 
                                 - colStatus.getWidth()
                                 - colType.getWidth()
                                 - colName.getWidth();
          if(remainingWidth > 0)
            colDetails.setWidth(remainingWidth);


         } finally {
          inUse = false;
        }
      }
    };
    activityTable.addListener(SWT.Resize, computeLastRowWidthListener);    
    colStatus.addListener(SWT.Resize,computeLastRowWidthListener);
    colType.addListener(SWT.Resize,computeLastRowWidthListener);
    colName.addListener(SWT.Resize,computeLastRowWidthListener);
    
    activityTable.addListener(SWT.SetData, new Listener() {
      public void handleEvent(Event event) {
        TableItem item = (TableItem) event.item;
        int index = activityTable.indexOf (item);
        item.setText (0,MessageText.getString("DHTView.activity.status." + activities[index].isQueued()));
        item.setText (1,MessageText.getString("DHTView.activity.type." + activities[index].getType()));

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      public void mouseDown(MouseEvent arg0) {
        Utils.launch((String) ((Label) arg0.widget).getText());
      }
    });
    
    servicesList.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event e) {
        updateInfos();        
      }
    });
    servicesList.select(0);

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    label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
    label.setText(upload_session.getED2KLink().getAsString());
    label.setToolTipText(_._("uploadinfowindow.tab.general.label.ed2k_link.tooltip"));
    label.setForeground(SWTThread.getDisplay().getSystemColor(SWT.COLOR_BLUE));
    label.setCursor(new Cursor(SWTThread.getDisplay(),SWT.CURSOR_HAND));
    label.addListener(SWT.MouseUp, new Listener() {
      public void handleEvent(Event arg0) {
        Utils.setClipBoardText(upload_session.getED2KLink().getAsString());
      }
    });

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    label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
    label.setText(shared_file.getED2KLink().getAsString());
    label.setToolTipText(_._("sharedfilepropertieswindow.label.ed2k_link.tooltip"));
    label.setForeground(SWTThread.getDisplay().getSystemColor(SWT.COLOR_BLUE));
    label.setCursor(new Cursor(SWTThread.getDisplay(),SWT.CURSOR_HAND));
    label.addListener(SWT.MouseUp, new Listener() {
      public void handleEvent(Event arg0) {
        Utils.setClipBoardText(shared_file.getED2KLink().getAsString());
      }
    });

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    label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
    label.setText(search_result.getAsED2KLink().getAsString());
    label.setToolTipText(_._("searchpropertieswindow.label.ed2k_link.tooltip"));
    label.setForeground(SWTThread.getDisplay().getSystemColor(SWT.COLOR_BLUE));
    label.setCursor(new Cursor(SWTThread.getDisplay(),SWT.CURSOR_HAND));
    label.addListener(SWT.MouseUp, new Listener() {
      public void handleEvent(Event arg0) {
        Utils.setClipBoardText(search_result.getAsED2KLink().getAsString());
      }
    });

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    label.setToolTipText(_
        ._("downloadinfowindow.tab.general.label.ed2k_link.tooltip"));
    label.setForeground(SWTThread.getDisplay().getSystemColor(
        SWT.COLOR_BLUE));
    label.setCursor(new Cursor(SWTThread.getDisplay(), SWT.CURSOR_HAND));
    label.addListener(SWT.MouseUp, new Listener() {
      public void handleEvent(Event arg0) {
        Utils.setClipBoardText(download_session.getED2KLink()
            .getAsString());
      }
    });

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    setHeaderVisible(true);
    setLinesVisible (true);
    
    
    
    column_data_save_listener = new Listener() {
      public void handleEvent(Event arg0) {
        saveColumnSettings();
      }
    };
    
    addMenuDetectListener(new MenuDetectListener() {
      public void menuDetected(MenuDetectEvent arg0) {
        setMenu(getPopUpMenu());        
      }
    });
    
    addListener(SWT.SetData, new Listener(){
      public void handleEvent(Event arg0) {
        TableItem item = (TableItem) arg0.item;
        int index = indexOf(item);
        
        if (enable_alternate_background_color)
          if (index%2==0)
            item.setBackground(ROW_ALTERNATE_COLOR_2);
          else
            item.setBackground(ROW_ALTERNATE_COLOR_1);
        
        T object = (T)line_list.get(index).getData(SWTConstants.ROW_OBJECT_KEY);
        updateRow(object);
      }
    });
    
    addListener(SWT.MeasureItem, new Listener() {
      public void handleEvent(Event event) {
          switch(event.type) {
           case SWT.MeasureItem: {
            event.height = SWTConstants.TABLE_ROW_HEIGHT;
            break;
           }}}
    });
    
    addListener(SWT.PaintItem, new Listener() {
      public void handleEvent(Event event) {
        int row_id = indexOf((TableItem)event.item);
        int column_id = event.index;
        int width = getColumn(column_id).getWidth(); // event's width is not used !
        BufferedTableRow row = line_list.get(row_id);

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    table_column.setMoveable(true);
    table_column.setResizable(true);
    table_column.addListener(SWT.Resize, column_data_save_listener);
    table_column.addListener(SWT.Move, column_data_save_listener);
    
    Listener sort_listener = new Listener() {
      private int sort_order = 0;
      public void handleEvent(final Event e) {
        
        SWTThread.getDisplay().asyncExec(new JMRunnable() {
          public void JMRun() {

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                        }});
              } catch (JMUpdaterException e) {}
                  }
                }).start();
              }
              shell.addListener(SWT.Close, new Listener() {
          public void handleEvent(Event arg0) {
            boolean exit = SWTPreferences.getInstance().promptOnExit() ? 
                Utils.showConfirmMessage(shell, _._("mainwindow.exit_prompt_title"), _._("mainwindow.exit_prompt")) : true;
            arg0.doit = exit;
          }

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  private boolean kbyte_selected = true;
  
  public GeneralTab(Composite parent) {
    super(parent);
  
    Listener number_filter = new Listener() {
      public void handleEvent(Event e) {
            String text = e.text;


            char[] chars = new char[text.length()];
            text.getChars(0, chars.length, chars, 0);

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