Chapter 13: Graphical User Interface Controls

Note: this page applies to the now-obsolete first edition of the book. For the second edition, please see http://www.corewebprogramming.com.

Note that the entire text of this chapter is available on-line. Also note that on-line examples that say they require Java 1.1 means that you need IE4 or Netscape 4.06 or later. IE3, Netscape3, and Netscape 4.0-4.05 do not support Java 1.1.

Contents

• Java Classes in this Chapter
• Labeled GUI Controls
• Classes Used to Test Color Support
• Core Web Programming on-line ordering page. 20% off at amazon.com; ships in 24 hours.
• For more details, see the following books on the AWT and Swing.

Java Classes in this Chapter

• ActionExample1.java. This illustrates processing action events in individual components in Java 1.0. Requires ResizeButton and QuittableFrame.
• ResizeButton.java. A button, that when clicked, resizes the window that contains it. Used in ActionExample1.
• ActionExample2.java. This illustrates processing action events in containers in Java 1.0. Requires QuittableFrame.
• ActionExample3.java. This illustrates processing action events in individual components in Java 1.1. Requires SetSizeButton and CloseableFrame.
• SetSizeButton.java
• ActionExample4.java. This illustrates processing action events in external listeners in Java 1.1. Requires CloseableFrame.
• Buttons.java. Shows some simple buttons.
  (also available on-line through Buttons.html)
• ButtonExample.java. Illustrates the processing of button events in Java 1.1. Requires FgReporter, BgReporter, SizeReporter, and CloseableFrame.
• FgReporter.java
• BgReporter.java
• SizeReporter.java
• ImageLabel/ImageButtons.java. Illustrates some image buttons. Requires ImageButton
  (also available on-line through ImageLabel/ImageButtons.html)
• ImageLabel/ImageButton.java. A class that acts like Button (in Java 1.0) but supports images instead of text.
• Checkboxes.java. Shows some simple checkboxes. Requires QuittableFrame.
• CheckboxGroups.java. Shows regular checkboxes next to radio buttons (checkboxes in groups).
  (also available on-line through CheckboxGroups.html)
• SimpleChoiceTest.java. Shows a simple choice list (drop-down menu).
  (also available on-line through SimpleChoiceTest.html)
• ChoiceTest.java. Adds some basic Java 1.0-style event processing to the SimpleChoiceTest.
  (also available on-line through ChoiceTest.html)
• Lists.java. A simple list box (Java 1.02 syntax). Requires QuittableFrame.
• TwoLists.java. Pure 1.1 version of a simple list box. Requires CloseableFrame.
• ListEvents1.java. Illustrates the handling of list events in Java 1.0. Requires QuittableFrame.
• ListEvents2.java. Illustrates the handling of list events in Java 1.1. Requires SelectionReporter, ActionReporter, and CloseableFrame.
• SelectionReporter.java
• ActionReporter.java
• ListEvents3.java. Extends ListEvents2 to handle more events, and illustrates inner classes.
• TextFields.java. Shows some basic textfields.
  (also available on-line through TextFields.html)
• JavaTextField.java. Illustrates textfield event-handling in Java 1.0 by making a spelling-correcting textfield.
  (also available on-line through JavaTextField.html)
• JavaTextField2.java. Illustrates textfield event-handling in Java 1.1 by making a spelling-correcting textfield. Requires LanguageField
  (also available on-line in a Java 1.1 capable browser through JavaTextField2.html)
• LanguageField.java
• TextAreas.java. Shows two simple text areas.
  (also available on-line through TextAreas.html)
• Labels.java. Shows some simple text labels.
  (also available on-line through Labels.html)
• ReverseLabels.java. Shows how to handle mouse events for labels in Java 1.1. Requires ReversibleLabel and CloseableFrame.
• ReversibleLabel.java. Uses inner classes to process mouse-enter and mouse-exit events.
• ScrollbarValues.java. Illustrates the difference between how Java 1.0 and 1.1 interpret maximum values in scrollbars. Requires QuittableFrame.
• WastedSpace.java. Illustrates an implementation bug whereby Internet Explorer 3, Netscape 4, and Sun's 1.02 JDK leave wasted space at the bottom/right of scrollbars with small ranges of values on Windows 95/NT.
  (also available on-line through WastedSpace.html)
• Scrollbars.java. Scrollbars with varying bubble (thumb) sizes but constant ranges and initial values.
  (also available on-line through Scrollbars.html)
• BetterScrollbar.java. A scrollbar class that interprets maximum values identically in Java 1.0 and 1.1, and tries to work around the inconsistent support for unit/block scroll settings.
• Sliders.java. Illustrates a slider class that encapsulates a textfield and a scrollbar. Requires Slider, ScrollbarPanel, and QuittableFrame.
  (You can also view an applet version of this on-line at SliderApplet.html.)
• Slider.java. A slider class that encapsulates a textfield and a scrollbar. Documentation is on-line at Slider.html, with an example at SliderApplet.html. Requires ScrollbarPanel and QuittableFrame.
• ScrollbarPanel.java
• ColorPopupMenu.java. Illustrates popup menus in Java 1.1.
  (also available on-line in a Java 1.1 capable browser through ColorPopupMenu.html)
• JAppletExample.java. Illustrates the three major differences between using JApplet and Applet:
  • Using the content pane,
  • Getting Java (Metal) look and feel by default, and
  • Having BorderLayout be the default instead of FlowLayout.
  Requires WindowUtilities; run it by loading JAppletExample.html in appletviewer in Java2 (or in a regular browser only if you have installed Swing 1.1).
• JFrameExample.java. Illustrates two major differences between using JFrame and Frame:
  • Using the content pane,
  • Getting Java (Metal) look and feel by default
  Requires WindowUtilities and ExitListener. You need Java2 or Swing 1.1 to run this.
• JOptionPaneExamples.java. This demonstrates the use of the Swing JOptionPane methods, letting the user interactively create any of the main JOptionPanes, specifying the various options and choosing the desired looks. Requires Swing 1.1 or Java2 (JDK 1.2), as well as using WindowUtilities, ExitListener, DisableListener, JLabeledTextField, and RadioButtonPanel.

Labeled GUI Controls

• Labeled-Controls/LabeledChoice.java
• Labeled-Controls/LabeledList.java
• Labeled-Controls/LabeledSlider.java
• Labeled-Controls/LabeledTextField.java
• Labeled-Controls/LabeledTextArea.java

Classes Used to Test Color Support

• Color-Testing/ColorButtons.java
  (also available on-line through Color-Testing/ColorButtons.html)
• Color-Testing/ColorCheckboxes.java
  (also available on-line through Color-Testing/ColorCheckboxes.html)
• Color-Testing/ColorChoiceTest.java
  (also available on-line through Color-Testing/ColorChoiceTest.html)
• Color-Testing/ColorLabels.java
  (also available on-line through Color-Testing/ColorLabels.html)
• Color-Testing/ColorLists.java
  (also available on-line through Color-Testing/ColorLists.html)
• Color-Testing/ColorTextComponents.java
  (also available on-line through Color-Testing/ColorTextComponents.html)
• Color-Testing/ColorScrollbars.java
  (also available on-line through Color-Testing/ColorScrollbars.html)