“Look and Feel” and Layouts Feb 11, 2000

Pluggable Look and Feel zYou can change the looking or “look and feel” of your Swing application easily into: yWindows yMacintosh yMotif (X-windows) yJava look zBig win for software portability in a sense that we can have a program which looks the same across platforms. zIf you don’t care about how your program looks, Don’t bother!!!

public static void main(String[] args) { try { UIManager.setLookAndFeel( // Put your favorite Look and Feel here!!! ); } catch (Exception e) { } new SwingApplication(); } "javax.swing.plaf.metal.MetalLookAndFeel" "com.sun.java.swing.plaf.windows.WindowsLookAndFeel” "com.sun.java.swing.plaf.motif.MotifLookAndFeel" "javax.swing.plaf.mac.MacLookAndFeel" Setting Look and Feel

Layouts

import java.awt.*; import java.awt.event.*; import javax.swing.*; class LayoutDemo { JFrame frame; Container pane; LayoutDemo(){ frame = new JFrame("LayoutDemo"); pane = frame.getContentPane(); } private void setupGUI(int w,int l) { addComponent(); frame.setSize(w,l); frame.setVisible(true); frame.pack(); } private void addComponent() { // next page } public static void main(String args[]) { int w = Integer.parseInt(args[0]); int l = Integer.parseInt(args[1]); LayoutDemo demo = new LayoutDemo(); demo.setupGUI(w,l); }

private void addComponent(){ pane.setLayout(new BorderLayout()); JCheckBox jck1 = new JCheckBox("this class is easy"); JCheckBox jck2 = new JCheckBox("this class is hard"); pane.add(jck1,"East"); pane.add(jck2,"South"); JButton b1 = new JButton("no touch"); JButton b2 = new JButton("please touch"); pane.add(b1,"North"); pane.add(b2,"West"); JLabel label = new JLabel(new ImageIcon("cab.gif")); pane.add(label,"Center"); }

private void addComponent(){ pane.setLayout(new GridLayout(2,3)); JCheckBox jck1 = new JCheckBox("this class is easy"); JCheckBox jck2 = new JCheckBox("this class is hard"); pane.add(jck1); pane.add(jck2); JButton b1 = new JButton("no touch"); JButton b2 = new JButton("please touch"); pane.add(b1); pane.add(b2); JLabel label = new JLabel(new ImageIcon("cab.gif")); pane.add(label); }

private void addComponent(){ pane.setLayout(new FlowLayout()); JCheckBox jck1 = new JCheckBox("this class is easy"); JCheckBox jck2 = new JCheckBox("this class is hard"); pane.add(jck1); pane.add(jck2); JButton b1 = new JButton("no touch"); JButton b2 = new JButton("please touch"); pane.add(b1); pane.add(b2); JLabel label = new JLabel(new ImageIcon("cab.gif")); pane.add(label); }

private void addComponent(){ pane.setLayout(new BoxLayout(pane,BoxLayout.Y_AXIS));... } private void addComponent(){ pane.setLayout(new BoxLayout(pane,BoxLayout.X_AXIS));... }

private void addComponent() { JPanel p1 = new JPanel(); p1.setLayout( new BoxLayout(p1,BoxLayout.Y_AXIS)); JCheckBox jck1 = new JCheckBox("this class is easy"); JCheckBox jck2 = new JCheckBox("this class is hard"); p1.add(jck1); p1.add(jck2); JPanel p2 = new JPanel(); p2.setLayout( new BoxLayout(p2,BoxLayout.Y_AXIS)); JButton b1 = new JButton("no touch"); JButton b2 = new JButton("please touch"); p2.add(b1); p2.add(b2); JLabel label = new JLabel( new ImageIcon("cab.gif")); pane.add(label,"Center"); pane.add(p1,"West"); pane.add(p2,"East"); }