Color combobox renderer

  

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.ListCellRenderer;
import javax.swing.ToolTipManager;
import javax.swing.border.CompoundBorder;
import javax.swing.border.LineBorder;
import javax.swing.border.MatteBorder;

public class ColorComboRenderer extends JPanel implements ListCellRenderer {
  protected Color m_c = Color.black;

  public ColorComboRenderer() {
    super();
    setBorder(new CompoundBorder(
        new MatteBorder(2, 10, 2, 10, Color.white), new LineBorder(
            Color.black)));
  }

  public Component getListCellRendererComponent(JList list, Object obj,
      int row, boolean sel, boolean hasFocus) {
    if (obj instanceof Color)
      m_c = (Color) obj;
    return this;
  }

  public void paint(Graphics g) {
    setBackground(m_c);
    super.paint(g);
  }

  public static void main(String[] a) {
    JComboBox cbColor = new JComboBox();
    int[] values = new int[] { 0, 128, 192, 255 };
    for (int r = 0; r < values.length; r++)
      for (int g = 0; g < values.length; g++)
        for (int b = 0; b < values.length; b++) {
          Color c = new Color(values[r], values[g], values[b]);
          cbColor.addItem(c);
        }
    cbColor.setRenderer(new ColorComboRenderer());
    
    JFrame f = new JFrame();
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    f.getContentPane().add(cbColor);
    f.pack();
    f.setSize(new Dimension(300, 80));
    f.show();    
    
  }
}

Related examples in the same category

1.	Combobox combines a button or editable field and a drop-down list.
2.	Using drop-down lists
3.	A fancy example of JComboBox with a custom renderer and editor
4.	Editable ComboBox
5.	Create a simple combobox
6.	Font Chooser ComboBox
7.	Select the combobox by choose the nearby label
8.	ComoboBox loads and saves items automatically from a file
9.	Sharing a Model between a JList and JComboBox
10.	ComboBox Demo 2
11.	Custom ComboBox with Image
12.	ComboBox Demo
13.	List: Shared Data Sample
14.	Selecting Combo Sample
15.	MultiKey Combo
16.	PopupCombo Sample
17.	Dual Sample: JList and ComboBox
18.	ComboBox Sample
19.	Color ComboBox: ComboBoxEditor Demo
20.	Determining When the Menu of a JComboBox Component Is Displayed
21.	Listening for Action Events from a JComboBox Component
22.	Listening for Changes to the Selected Item in a JComboBox Component
23.	Setting the Number of Visible Items in the Menu of a JComboBox Component
24.	Displaying the Menu in a JComboBox Component Using a Keystroke If the Selected Item Is Not Unique
25.	Displaying the Menu in a JComboBox Component Using a Keystroke
26.	Determining If the Menu of a JComboBox Component Is Visible
27.	Selecting an Item in a JComboBox Component with Multiple Keystrokes
28.	Adding and Removing an Item in a JComboBox Component
29.	Add an item after the first item
30.	Add an item to the end of the list
31.	Remove first item
32.	Remove the last item
33.	Remove all items
34.	Getting the Items in a JComboBox Component
35.	Getting and Setting the Selected Item in a JComboBox Component
36.	If the combobox is editable, the new value can be any value
37.	Creating a read-only and editable JComboBox Component
38.	ArrayListComboBoxModel Demo
39.	A frame with a sample text label and a combo box for selecting font faces

Color combobox renderer : ComboBox « Swing JFC « Java

Related examples in the same category