jQuery in Action, 2nd edition*
The moose likes Swing / AWT / SWT and the fly likes how to set Box color? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of Android Security Essentials Live Lessons this week in the Android forum!
JavaRanch » Java Forums » Java » Swing / AWT / SWT
Bookmark "how to set Box color?" Watch "how to set Box color?" New topic
Author

how to set Box color?

Max Simpson
Ranch Hand

Joined: Sep 23, 2004
Posts: 30
Hi,
I have tried setting a Box background color by doing the following and haven't had any luck:

box.setBackground(Color.BLACK);

The Box just stays the regular old gray. I have tried different colors, caps, lowercase.. nothing works.

Thanks in advance.
kiran raja
Greenhorn

Joined: May 11, 2004
Posts: 22
this program is an example for setting the background colour for a Box.May be this may help you.
First set the background as in GraphicsPanel and then add it to the Box .
Please let me know where this works .

--Kiran



import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

////////////////////////////////////////////////////////////////// ColorDisplay
class ColorDisplay extends JFrame {

JSlider redBar; // Slider for adjusting red from 0-255
JSlider grnBar;
JSlider bluBar;

int red = 128; // initial red color value
int green = 128;
int blue = 128;

GraphicsPanel palette; // an area to display the color
JTextField txtField; // shows the Java source equivalent

//================================================ constructor
public ColorDisplay() {
palette = new GraphicsPanel();

// Create a textfield for displaying the values
txtField = new JTextField();
txtField.setFont(new Font("Monospaced", Font.PLAIN, 12));
txtField.setText("Color(" + red + ", " + green + ", " + blue +
") or " + "Color(0x" +
Integer.toHexString(blue + 256 * (green + 256 * red)) + ")");
txtField.setEditable(false);

// Create one object that will listen to all sliders
ChangeListener al = new ColorListener();

redBar = new JSlider(JSlider.VERTICAL, 0, 255, red);
redBar.addChangeListener(al);
redBar.setBackground(Color.red);

grnBar = new JSlider(JSlider.VERTICAL, 0, 255, green);
grnBar.addChangeListener(al);
grnBar.setBackground(Color.green);

bluBar = new JSlider(JSlider.VERTICAL, 0, 255, blue);
bluBar.addChangeListener(al);
bluBar.setBackground(Color.blue);

//=== Put the color palette and textfield in a box
Box paletteText = Box.createVerticalBox();
paletteText.add(palette);
paletteText.add(txtField);

//=== put the 3 sliders in a gridlayout panel
JPanel colorControls = new JPanel();
colorControls.setLayout(new GridLayout(1, 3));
colorControls.add(redBar);
colorControls.add(grnBar);
colorControls.add(bluBar);

//=== Now let's build the content pane
Container content = this.getContentPane();
content.setLayout(new BoxLayout(content, BoxLayout.X_AXIS));
content.add(paletteText);
content.add(colorControls);

this.setTitle("ColorDisplay");
this.pack();
}//end constructor

////////////////////////////////////////////////////////////// GraphicsPanel
// A component for drawing ,overrides paintComponent()
class GraphicsPanel extends JPanel {
//======================================== GraphicsPanel constructor
public GraphicsPanel() {
this.setPreferredSize(new Dimension(300, 300));
this.setBackground(Color.white);
this.setForeground(Color.black);
}//end constructor

//=================================== GraphicsPanel : paintComponent
public void paintComponent(Graphics g) {
super.paintComponent(g); // paint background, border
g.setColor(new Color(red, green, blue)); // Set the color
g.fillRect(0, 0, this.getWidth(), this.getHeight()); // Color everything
}//endmethod paintComponent
}//endclass GraphicsPanel


///////////////////////////////////////////////////// class ColorListener
// This class is created only as a place to put the listener.
// We could have just as easily put the listener in any other class,
// or used an anonymous listener.
// This is defined as an inner class (defined inside of ColorDisplay),
// so it can reference the field variables of that class (specifically,
// the sliders, graphics panel, and text field).
class ColorListener implements ChangeListener {
public void stateChanged(ChangeEvent ae) {
red = redBar.getValue();
green = grnBar.getValue();
blue = bluBar.getValue();
txtField.setText("Color(" + red + ", " + green + ", " + blue +
") or " + "Color(0x" + Integer.toHexString(blue +
256 * (green + 256 * red)) + ")");
palette.repaint();
}//endmethod stateChanged
}//endclass ColorListener

//================================================================= main
public static void main(String[] args) {
JFrame window = new ColorDisplay();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setVisible(true);
}//end main

}//end class ColorDisplay
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: how to set Box color?
 
Similar Threads
change font size or color in javascript alert box
Viewing inside the Box!
css background color question
JList SelectionForeground problem when BOLD
In disabled mode, how do i make JList data to be in black color