How to set BackGround color to a divider in JSplitPane
I have created a divider in JSplitPane
. I am unable to set the color of divider. I want to set the color of divider. Please help me how to set color of that divider.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class SplitPaneDemo {
JFrame frame;
JPanel left, right;
JSplitPane pane;
int lastDividerLocation = -1;
public static void main(String[] args) {
SplitPaneDemo demo = new SplitPaneDemo();
demo.makeFrame();
demo.frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
demo.frame.show();开发者_高级运维
}
public JFrame makeFrame() {
frame = new JFrame();
// Create a horizontal split pane.
pane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
left = new JPanel();
left.setBackground(Color.red);
pane.setLeftComponent(left);
right = new JPanel();
right.setBackground(Color.green);
pane.setRightComponent(right);
JButton showleft = new JButton("Left");
showleft.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Container c = frame.getContentPane();
if (pane.isShowing()) {
lastDividerLocation = pane.getDividerLocation();
}
c.remove(pane);
c.remove(left);
c.remove(right);
c.add(left, BorderLayout.CENTER);
c.validate();
c.repaint();
}
});
JButton showright = new JButton("Right");
showright.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Container c = frame.getContentPane();
if (pane.isShowing()) {
lastDividerLocation = pane.getDividerLocation();
}
c.remove(pane);
c.remove(left);
c.remove(right);
c.add(right, BorderLayout.CENTER);
c.validate();
c.repaint();
}
});
JButton showboth = new JButton("Both");
showboth.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Container c = frame.getContentPane();
c.remove(pane);
c.remove(left);
c.remove(right);
pane.setLeftComponent(left);
pane.setRightComponent(right);
c.add(pane, BorderLayout.CENTER);
if (lastDividerLocation >= 0) {
pane.setDividerLocation(lastDividerLocation);
}
c.validate();
c.repaint();
}
});
JPanel buttons = new JPanel();
buttons.setLayout(new GridBagLayout());
buttons.add(showleft);
buttons.add(showright);
buttons.add(showboth);
frame.getContentPane().add(buttons, BorderLayout.NORTH);
pane.setPreferredSize(new Dimension(400, 300));
frame.getContentPane().add(pane, BorderLayout.CENTER);
frame.pack();
pane.setDividerLocation(0.5);
return frame;
}
}
Thanks Sunil kumar Sahoo
Or, since the divider is a container, you can do the following:
dividerContainer = (BasicSplitPaneDivider) splitPane.getComponent(2);
Component leftBtn = dividerContainer.getComponent(0);
Component rightBtn = dividerContainer.getComponent(1);
dividerContainer.setBackground(Color.white);
dividerContainer.setBorder(BorderFactory.createEmptyBorder(0, 4, 0, 4));
dividerContainer.setLayout(new FlowLayout(FlowLayout.CENTER, 0, 0));
dividerContainer.add(toolbar);
dividerContainer.setDividerSize(toolbar.getPreferredSize().height);
This code works for me:
splitPane.setUI(new BasicSplitPaneUI() {
public BasicSplitPaneDivider createDefaultDivider() {
return new BasicSplitPaneDivider(this) {
public void setBorder(Border b) {
}
@Override
public void paint(Graphics g) {
g.setColor(Color.GREEN);
g.fillRect(0, 0, getSize().width, getSize().height);
super.paint(g);
}
};
}
});
splitPane.setBorder(null);
You can change divider color "g.setColor(new Color(R,G,B))".
This worked for me fine.First you are creating JFrame with it's normal methods such as setDefaultCloseOperation()
, setBounds()
, getContentPane()
. Then create an object from your class then use that to call all the other methods through out the program, in this case I created object called app. One thing you have to keep in mind is that don't forget to use ActionListener e
.
Also color changes must go with setBackground()
function, while you getting the values from getSource()
for the color change.
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class Main implements ActionListener {
private static void createAndShowGUI() {
Main app=new Main();
// make frame..
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame("I am a JFrame");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBounds(20,30,300,120);
frame.setLayout(null);
//Create a split pane
JSplitPane myPane = new JSplitPane();
myPane.setOpaque(true);
myPane.setDividerLocation(150);
app.right = new JPanel();
app.right.setBackground(new Color(255,0,0));
app.left = new JPanel();
app.left.setBackground(new Color(0,255,0));
app.left.setLayout(null);
myPane.setRightComponent(app.right);
myPane.setLeftComponent(app.left);
// make buttons
app.butt1=new JButton("Red");
app.butt2=new JButton("Blue");
app.butt3=new JButton("Green");
// add and size buttons
app.left.add(app.butt1);
app.butt1.setBounds(10,10, 100,20);
app.left.add(app.butt2);
app.butt2.setBounds(10,30, 100,20);
app.left.add(app.butt3);
app.butt3.setBounds(10,50, 100,20);
// set up listener
app.butt1.addActionListener(app);
app.butt2.addActionListener(app);
app.butt3.addActionListener(app);
frame.setContentPane(myPane);
frame.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
// check which button and act accordingly
if (e.getSource()==butt1)
right.setBackground(new Color(255,0,0));
if (e.getSource()==butt2)
right.setBackground(new Color(0,0,255));
if (e.getSource()==butt3)
right.setBackground(new Color(0,255,0));
}
public static void main(String[] args) {
// start off..
try {
UIManager.setLookAndFeel(
"javax.swing.plaf.metal.MetalLookAndFeel" );
}
catch (Exception e)
{
System.out.println("Cant get laf");
}
Object a[]= UIManager.getInstalledLookAndFeels();
for (int i=0; i<a.length; i++)
System.out.println(a[i]);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
// application object fields
int clickCount=0;
JLabel label;
JButton butt1;
JButton butt2;
JButton butt3;
JPanel left;
JPanel right;
}
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