Designing a User Interface with Swing Assignment Swing: Update code of an earlier program

Swing: Part of the Java Foundational Classes JDK1.2 §Expanded components §Better event handling §Selectable look & Feel §Extends AWT

Benefits of Swing §Swing provides for a different Look & Feel §Metal is the name of new interface in Java §All Components Compatibility (www…) §All Components written in Java(not so earlier) §import java.awt.swing.*; OR §javax.swing in Beta 4 (and up)

An Applications Framework §FRAMEWORK.JAVA l Just provides a frame (no components) §SWINGER.JAVA l A button “I receive a disproportionate amount of pleasure from being clicked. Please interact with me.” l Jframe NEW term “ an intermediate container called the content pane”

Jframe subdivided into panes §Create Jframe l Jframe frame = new Swinger( ); §Add all components (use add(Component)) l pane.add(hotbutton) §Make the Jpanel l Jpanel pane = new Jpanel( );

Working with Swing §NEW TERM icon l l (.gif files added to the icon ImageIcon una = new ImageIcon(“unabom.gif”); §

Swing §Labels Jlabel(String, int) §Buttons “ §TextFields JTextArea(int, int) §TextAreas “ §Check Boxes and Radio Buttons §Choice Lists“ §Scrollbars JScrollBar( int, int, int, int, int)

SwingColorTest §An “old” program revisited & Updated It is the “old” Hue Saturation & Brightness OR R G B §All done with Swing

New Swing UI manager §A Swing Layout manager/ user-interface manager l Windows 95 or NT Look & Feel Motif X- Window, Metal, Swing’s cross platform “ “ §try { UIManager.setLookAndFeel( §UIManager.getCrossPlatformLookAndFeel Classname( )); } catch(Exception e) { System.err.println(“Can’t set look and feel: + e;}

Keyboard Mnemonics §A key Accelerator l purpose (without a mouse) - use control keys in combination with other keys to function instead of mouse l Jbutton infoButton = new Jbutton(“Info”)’ l infoButton.setMnemonic(‘I’); l Pressing Alt+ I causes “InfoButton” click

It’s ToolTime with Tim Allen Kidding … ToolTips §JScrollBar seed = JScrollBar( ); §Speed.setToolTip ( “Move to set animation speed”); l limit ToolTip ONLY one line long

Component Descriptions & Names §1. Get AssessibleContext( ) method on the component §2. Call setAcccessibleDescription(String) method on that AccessibleContext object §The string argument should be the component’s text description

Standard Dialog Boxes §Like Visual BASIC “Windows” that ask a small/simple question, warn, or provide message §ConfirmDialog = Y/N Cancel §InputDialog = prompt input §MessageDialog = message §OptionDialog = All of the above

Example §Int response; §response = JOptionPane.showConfirmDialog(null, “Should I delete all your irreplaceable personal files”); §MORE figures/code demo. Use of Dialog Boxes

INFO.JAVA §Last example of complete program in chapter. Uses Dialog boxes - Swing