Slides

Register a listener object on the button

Listing 9 registers a listener object on the button to cause it to

call the PictureExplorer object's new getRValue method
to get the red color value for the pixel at the current PictureExplorer cursor position, and
to display that value in the text field as shown in Figure 2
when the user clicks the button.

Listing 9. Register a listener object on the button.
getDataButton.addActionListener( new ActionListener(){ public void actionPerformed(ActionEvent e){ redField.setText(explorer.getRValue()); }//end action performed }//end newActionListener );//end addActionListener //--------------------------------------------------// }//end constructor }//end class Prob12Runner

Listing 9. Register a listener object on the button.

    getDataButton.addActionListener(
      new ActionListener(){
        public void actionPerformed(ActionEvent e){

          redField.setText(explorer.getRValue());

        }//end action performed
      }//end newActionListener
    );//end addActionListener
    //--------------------------------------------------//

  }//end constructor
}//end class Prob12Runner

File: az.htm

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