Setting an Accessory Component in a JFileChooser Dialog : JavaBeans « Development « Java Tutorial

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Java Tutorial » Development » JavaBeans

6. 56. 5. Setting an Accessory Component in a JFileChooser Dialog


import java.awt.Dimension;

import java.awt.Graphics;

import java.beans.PropertyChangeEvent;

import java.beans.PropertyChangeListener;

import java.io.File;



import javax.swing.JComponent;

import javax.swing.JFileChooser;



public class Main {

  public static void main(String[] argv) {

    JFileChooser chooser = new JFileChooser();

    chooser.setAccessory(new MyAccessory(chooser));

    chooser.showOpenDialog(null);

  }

}

class MyAccessory extends JComponent implements PropertyChangeListener {

  public MyAccessory(JFileChooser chooser) {

    chooser.addPropertyChangeListener(this);

    setPreferredSize(new Dimension(50, 50));

  }

  public void propertyChange(PropertyChangeEvent evt) {

    if (JFileChooser.SELECTED_FILE_CHANGED_PROPERTY.equals(evt.getPropertyName())) {

      JFileChooser chooser = (JFileChooser) evt.getSource();

      // Get the new selected file

      File newFile = (File) evt.getNewValue();

      repaint();

    }

  }

  public void paint(Graphics g) {

    // Paint a preview of the selected file

  }

}

6. 56. JavaBeans
	6. 56. 1.	Listening for Changes to the Selected File in a JFileChooser Dialog
	6. 56. 2.	Get a list of selected files
	6. 56. 3.	Listening for Changes to the Current Directory in a JFileChooser Dialog
	6. 56. 4.	Displaying the Current Directory in the Title of a JFileChooser Dialog
	6. 56. 5.	Setting an Accessory Component in a JFileChooser Dialog
	6. 56. 6.	Convert a bean to XML persistence
	6. 56. 7.	Listen for bean's property change event
	6. 56. 8.	List property names of a Bean
	6. 56. 9.	Prevent bean's property being serialized to XML
	6. 56. 10.	Create an instance a Bean
	6. 56. 11.	Convert an XML persistence to bean
	6. 56. 12.	Determine bean's property type
	6. 56. 13.	Listen for a constrained property change
	6. 56. 14.	Bean has a single property called property.
	6. 56. 15.	Implementing a Bound Property
	6. 56. 16.	Implementing a Constrained Property: fires a PropertyChangeEvent whenever its value is about to be changed.
	6. 56. 17.	Instantiating a Bean
	6. 56. 18.	Listing the Property Names of a Bean
	6. 56. 19.	Getting and Setting a Property of a Bean
	6. 56. 20.	Get and set the value of a property in a bean using Expression and Statement
	6. 56. 21.	Get and set an Object type property
	6. 56. 22.	gets and sets a primitive type property
	6. 56. 23.	gets and sets an array type property
	6. 56. 24.	Serializing a Bean to XML: XMLEncoder only persists the value of public properties.
	6. 56. 25.	Deserializing a Bean from XML
	6. 56. 26.	Preventing a Bean Property from Being Serialized to XML
	6. 56. 27.	Serializing an Immutable Bean Property to XML
	6. 56. 28.	Listening for a Property Change Event: A property change event is fired when a bound property is changed.
	6. 56. 29.	Listening for a Vetoable Property Change Event
	6. 56. 30.	Read bean's property value
	6. 56. 31.	extends SimpleBeanInfo
	6. 56. 32.	Get and set properties on a bean
	6. 56. 33.	Process bean properties getter by applying the JavaBean naming conventions.
	6. 56. 34.	Is JavaBean Compliant Setter
	6. 56. 35.	Constructs a method name from element's bean name for a given prefix
	6. 56. 36.	Returns attribute's setter method. If the method not found then NoSuchMethodException will be thrown.

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