DOCSLIB.ORG

1 Swing: Components for Graphical User Interfaces

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

GUI Computer Science and Engineering The Ohio State University Swing: Components for Graphical User Interfaces Computer Science and Engineering College of Engineering The Ohio State University Lecture 24 GUI: A Hierarchy of Nested Widgets Visual (Containment) Hierarchy Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University Top-level widgets: outermost window (a container) Frame, applet, dialog Intermediate widgets: allow nesting (a container) General purpose Panel, scroll pane, tabbed pane, tool bar Special purpose Layered pane Atomic widgets: nothing nested inside Basic controls Button, list, slider, text field Uneditable information displays Label, progress bar, tool tip Interactive displays of highly formatted information Color chooser, file chooser, tree For a visual (“look & feel”) of widgets see: http://java.sun.com/docs/books/tutorial/uiswing/components Vocabulary: Widgets usually referred to as “GUI components” or simply “components” History Class Hierarchy: Component Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University Java 1.0: AWT (Abstract Window Toolkit) Operations common to Platform-dependent implementations of widgets nonmenu-related GUI Java 1.2: Swing widgets java.lang More than 60 (public) Most widgets written entirely in Java methods! Object More portable Drawing the widget Main Swing package: javax.swing paint(): draw the whole java.awt Defines various GUI widgets widget Component Extensions of classes in AWT repaint(): schedule the Many class names start with “J” widget to be redrawn, will result in framework Includes 16 nested subpackages calling… javax.swing.event, javax.swing.table, javax.swing.text… update(): modifies part of Basic GUI widgets include widget, or just calls JFrame, JDialog paint() for full refresh JPanel, JScrollPane, JTabbedPane, JToolBar Appearance of widget JButton, JRadioButton, JCheckBox, JTextField, JSlider setvisible(): determine whether widget will be JLabel, JToolTip visible on screen JColorChooser, JFileChooser setLocation() extends Dealing with user events 1 Class Hierarchy: Container Basic Hierarchy: JComponent Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University A widget that can Base class for all include other widgets Visual nesting java.lang Swing widgets, java.lang Contained widgets Object except top-level Object are called “children” containers (ie But not children as in java.awt java.awt behavioral subtypes Component applet, frame, Component Methods for dialog) managing contained java.awt java.awt widgets Container Container add: adds components to container javax.swing setLayout: specifies JComponent the layout manager that helps container position and size contained components extends extends Part of JComponent Hierarchy JLabel Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University A JLabel object provides text JComponent instructions or information on a GUI Displays a single line of read-only text, an image, or both JFileChooser AbstractButton JLabel JPanel . See Example code JToggleButton JButton Output One thing to be empasized: JCheckBox JRadioButton If you do not explicitly add a GUI component to a container, the GUI component will not be displayed when the extends container appears on the screen An Interactive GUI Component Handling Events Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University To make an interactive GUI program, GUI is event driven you need: Event handling occurs as a loop: GUI program is idle Components User performs an action, for example: Buttons, windows, menus, etc. Moving the mouse, clicking a button, closing a window, typing in a text box, selecting an item EtEvents from a menu, … Mouse clicked, window closed, button clicked, Such an action generates an event etc. The event is sent to the program, which Event listeners (implement an interface) responds Code executes, GUI updates and event handlers (methods) GUI program returns to being idle Listen for events to be trigged, and then Many event types defined in perform actions to handle them java.awt.event and javax.swing.event 2 Part of AWTEvent Hierarchy Handling Events Mechanism Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University Three parts of the event-handling EventObject mechanism Event source: the GUI component with which the AWTEvent user interacts Event object: encapsulated information about the ActionEvent TextEvent occurred event Event listener: an object that is notified by the AdjustmentEvt ComponentEvt ItemEvent event source when an event occurs, and provides responds to the event ContainerEvt WindowEvent ActionEvent FocusEvent InputEvent PaintEvent JButton ActionListener extends ContainerEvt FocusEvent Programmer Tasks JTextField and JPasswordField Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University Implement an event listener Single-line areas for text Can be editable (user enters text from keyboard) A class X that implements one (or more) of or not the event listener interfaces Password field does not show individual interface ActionListener { characters void actionPerformed (ActionEvent e); When the user types data into them and } presses the Enter key: interface FocusListener { An event occurs (ActionEvent) void focusGained (FocusEvent e); All registered listeners (ActionListeners) receive void focusLost (FocusEvent e); the event } Argument to method actionPerformed includes text from field Register an instance of X with component See: java.awt.Container has methods for adding Example code listeners Output void addFocusListener (FocusListener f) Buttons Part of JComponent Hierarchy Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University A button is a component the user clicks to trigger a specific action JComponent There are several types of buttons, all are subclasses of AbstractButton Command button: Class JButton, generates ActionEvent JFileChooser AbstractButton JLabel JPanel . Toggle button: Has on/off or true/false values Check boxes: A group of buttons in which more than one can be JToggleButton JButton selected, generates ItemEvent Radio buttons: A group of buttons in which only one can be selected, JCheckBox JRadioButton generates ItemEvent See: Example code Output extends 3 More Components… Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University JComboBox: A drop-down list from which the user can make a selection Generates an ItemEvent JLis t: A list supporting both single and multiple selection Generates a ListSelectionEvent Layout Management Layout Management with Panels Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University Layout refers to how components are arranged in the Problem with container BorderLayout: The button is stretched to fill the entire southern region of the frame If you add another button to the southern region, it just displaces the first button Solution: use additional This positioning is determined by a layout manager panels Buttons in the above example are managed by the flow layout Act as containers for manager, which is the default layout manager for a panel interface elements and can themselves be arranged The default manager lines the components horizontally until inside a larger panel there is no more room and then start a new row of components Use flow layout by default After resizing the container, the layout manager reflows the components automatically To fix the BorderLayout problem The default is to center the components in each row, but this can JPanel p = new JPanel(); be overridden with left or right alignment 1. Create a new panel p.add(button1); panel.setLayout(new FlowLayout(FlowLayout.LEFT)); 2. Add each element to the panel p.add(button2); Other managers: for a visual (“look & feel”) index see 3. Add the panel to the larger P.add(button3); http://java.sun.com/docs/books/tutorial/uiswing/layout/visua container frame.add(panel, l.html BorderLayout.SOUTH); Supplemental Reading Summary Computer Science and Engineering The Ohio State University Computer Science and Engineering The Ohio State University A visual index to the Swing Containment hierarchy Components Containers (frame, applet, dialog) http://java.sun.com/docs/books/tutorial/u Components (panel, scroll pane, tabbed iswing/components pane,…) Con tr ol s (button, te xt fie ld, labe l, …) CtiCreating a GUI with JFC/SiJFC/Swing Event-driven programming http://java.sun.com/docs/books/tutorial/u Register handlers with components iswing/index.html Events are passed from components to Building a User Interface handlers http://java.sun.com/developer/onlineTrain Layout ing/new2java/divelog Look and feel? 4.
Recommended publications
  • Swing: Components for Graphical User Interfaces

    Swing: Components for Graphical User Interfaces

    Swing: Components for Graphical User Interfaces Computer Science and Engineering College of Engineering The Ohio State University Lecture 22 GUI Computer Science and Engineering The Ohio State University GUI: A Hierarchy of Nested Widgets Computer Science and Engineering The Ohio State University Visual (Containment) Hierarchy Computer Science and Engineering The Ohio State University Top-level widgets: outermost window (a container) Frame, applet, dialog Intermediate widgets: allow nesting (a container) General purpose Panel, scroll pane, tabbed pane, tool bar Special purpose Layered pane Atomic widgets: nothing nested inside Basic controls Button, list, slider, text field Uneditable information displays Label, progress bar, tool tip Interactive displays of highly formatted information Color chooser, file chooser, tree For a visual (“look & feel”) of widgets see: http://java.sun.com/docs/books/tutorial/uiswing/components Vocabulary: Widgets usually referred to as “GUI components” or simply “components” History Computer Science and Engineering The Ohio State University Java 1.0: AWT (Abstract Window Toolkit) Platform-dependent implementations of widgets Java 1.2: Swing Most widgets written entirely in Java More portable Main Swing package: javax.swing Defines various GUI widgets Extensions of classes in AWT Many class names start with “J” Includes 16 nested subpackages javax.swing.event, javax.swing.table, javax.swing.text… Basic GUI widgets include JFrame, JDialog JPanel, JScrollPane, JTabbedPane,
  • Proveos User Manual

    Proveos User Manual

    User Manual Contents Welcome .............................................................................................. 5 How proVEOS Works ...........................................................................................7 Installing the proVEOS Software for Windows ..................................... 9 Configuring Firewall Software .............................................................................10 Installing the Windows proVEOS Software .........................................................14 Signing in to proVEOS ........................................................................................24 Installing the proVEOS Software for Mac........................................... 29 Configuring the Firewall ......................................................................................30 Installing the Mac proVEOS Software.................................................................32 Signing in to proVEOS ........................................................................................34 Presenting with proVEOS ................................................................... 37 Starting a Presentation .......................................................................................40 Managing Participants ........................................................................................40 Chatting with Participants ...................................................................................45 Playing Music and Movies ................................................................
  • Java Programming

    Java Programming

    CHAPTER 15 Advanced GUI Topics In this chapter, you will: Use content panes Use color Learn more about layout managers Use JPanels to increase layout options Create JScrollPanes Understand events and event handling more thoroughly Use the AWTEvent class methods Handle mouse events Use menus Unless noted otherwise, all images are © 2014 Cengage Learning Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it. CHAPTER 15 Advanced GUI Topics Understanding the Content Pane The JFrame class is a top-level container Java Swing class. (The other two top-level container classes are JDialog and JApplet.) Every GUI component that appears on the screen must be part of a containment hierarchy. A containment hierarchy is a tree of components that has a 802 top-level container as its root (that is, at its uppermost level). Every top-level container has a content pane that contains all the visible components in the container’s user interface. The content pane can directly contain components like JButtons, or it can hold other containers, like JPanels, that in turn contain such components. A top-level container can contain a menu bar. A menu bar is a horizontal strip that conventionally is placed at the top of a container and contains user options.
  • Windows 7 Operating Guide

    Windows 7 Operating Guide

    Welcome to Windows 7 1 1 You told us what you wanted. We listened. This Windows® 7 Product Guide highlights the new and improved features that will help deliver the one thing you said you wanted the most: Your PC, simplified. 3 3 Contents INTRODUCTION TO WINDOWS 7 6 DESIGNING WINDOWS 7 8 Market Trends that Inspired Windows 7 9 WINDOWS 7 EDITIONS 10 Windows 7 Starter 11 Windows 7 Home Basic 11 Windows 7 Home Premium 12 Windows 7 Professional 12 Windows 7 Enterprise / Windows 7 Ultimate 13 Windows Anytime Upgrade 14 Microsoft Desktop Optimization Pack 14 Windows 7 Editions Comparison 15 GETTING STARTED WITH WINDOWS 7 16 Upgrading a PC to Windows 7 16 WHAT’S NEW IN WINDOWS 7 20 Top Features for You 20 Top Features for IT Professionals 22 Application and Device Compatibility 23 WINDOWS 7 FOR YOU 24 WINDOWS 7 FOR YOU: SIMPLIFIES EVERYDAY TASKS 28 Simple to Navigate 28 Easier to Find Things 35 Easy to Browse the Web 38 Easy to Connect PCs and Manage Devices 41 Easy to Communicate and Share 47 WINDOWS 7 FOR YOU: WORKS THE WAY YOU WANT 50 Speed, Reliability, and Responsiveness 50 More Secure 55 Compatible with You 62 Better Troubleshooting and Problem Solving 66 WINDOWS 7 FOR YOU: MAKES NEW THINGS POSSIBLE 70 Media the Way You Want It 70 Work Anywhere 81 New Ways to Engage 84 INTRODUCTION TO WINDOWS 7 6 WINDOWS 7 FOR IT PROFESSIONALS 88 DESIGNING WINDOWS 7 8 WINDOWS 7 FOR IT PROFESSIONALS: Market Trends that Inspired Windows 7 9 MAKE PEOPLE PRODUCTIVE ANYWHERE 92 WINDOWS 7 EDITIONS 10 Remove Barriers to Information 92 Windows 7 Starter 11 Access
  • LWUIT Developer's Guide

    LWUIT Developer's Guide

    Lightweight UI Toolkit Developer’s Guide Part No. 07-08-10 July 2010 Copyright © 2008, 2010 Oracle and/or its affiliates. All rights reserved. This software and related documentation are provided under a license agreement containing restrictions on use and disclosure and are protected by intellectual property laws. Except as expressly permitted in your license agreement or allowed by law, you may not use, copy, reproduce, translate, broadcast, modify, license, transmit, distribute, exhibit, perform, publish, or display any part, in any form, or by any means. Reverse engineering, disassembly, or decompilation of this software, unless required by law for interoperability, is prohibited. The information contained herein is subject to change without notice and is not warranted to be error-free. If you find any errors, please report them to us in writing. If this is software or related software documentation that is delivered to the U.S. Government or anyone licensing it on behalf of the U.S. Government, the following notice is applicable: U.S. GOVERNMENT RIGHTS Programs, software, databases, and related documentation and technical data delivered to U.S. Government customers are "commercial computer software" or "commercial technical data" pursuant to the applicable Federal Acquisition Regulation and agency-specific supplemental regulations. As such, the use, duplication, disclosure, modification, and adaptation shall be subject to the restrictions and license terms set forth in the applicable Government contract, and, to the extent applicable by the terms of the Government contract, the additional rights set forth in FAR 52.227-19, Commercial Computer Software License (December 2007). Oracle America, Inc., 500 Oracle Parkway, Redwood City, CA 94065.
  • The Desktop (Overview)

    The Desktop (Overview)

    The desktop (overview) The desktop is the main screen area that you see after you turn on your computer and log on to Windows. Like the top of an actual desk, it serves as a surface for your work. When you open programs or folders, they appear on the desktop. You can also put things on the desktop, such as files and folders, and arrange them however you want. The desktop is sometimes defined more broadly to include the taskbar and Windows Sidebar. The taskbar sits at the bottom of your screen. It shows you which programs are running and allows you to switch between them. It also contains the Start button , which you can use to access programs, folders, and computer settings. On the side of the screen, Sidebar contains small programs called gadgets. The desktop, taskbar, and Sidebar Where did my desktop go? Because programs run on top of the desktop, the desktop itself is often partially or completely hidden. But it's still there, underneath everything. To see the whole desktop without closing any of your open programs or windows, click the Show Desktop button on the taskbar. The desktop is revealed. Click the icon again to restore all of your windows to the way they were. Desktop Training Session Handout Page 1 http://ict.maxwell.syr.edu/vista/ Working with desktop icons Icons are small pictures that represent files, folders, programs, and other items. When you first start Windows, you'll see at least one icon on your desktop: the Recycle Bin (more on that later).
  • COMP1006/1406 Notes 2

    COMP1006/1406 Notes 2

    COMP1406/1006 - Design and Implementation of Computer Applications Winter 2006 2 Applications and LayoutManagers What's in This Set of Notes? We look here at how to create a graphical user interface (i.e., with windows) in JAVA. Creating GUIs in JAVA requires adding components onto windows. We will find out how to do this as well as look at an interesting JAVA feature called a "LayoutManager" that automatically arranges components on the window. This allows us to create simple windows without having to worry about resizing issues. Here are the individual topics found in this set of notes (click on one to go there): • 2.1 Creating a Basic GUI Application • 2.2 Components and Containers • 2.3 Layout Managers o 2.3.1 NullLayout o 2.3.2 FlowLayout o 2.3.3 BorderLayout o 2.3.4 CardLayout o 2.3.5 GridLayout o 2.3.6 GridBagLayout o 2.3.7 BoxLayout 2.1 Creating a Basic GUI Application Recall that a Graphical User Interface (GUI) is a user interface that has one or more windows. A frame: • is the JAVA terminology for a window (i.e., its a window frame) • represented by the Frame and JFrame classes in JAVA • used to show information and handle user interaction • has no security restrictions ... can modify files, perform I/O, open network connections to other computers, etc.. The following code creates a basic window frame in JAVA and shows it on the screen: javax.swing.JFrame frame = new javax.swing.JFrame("This appears at the top of the window"); frame.setSize(300, 100); frame.setVisible(true); Here is what it looks like: Although this code for bringing up a new window can appear anywhere, we typically designate a whole class to represent the window (that is, the JAVA application).
  • Spot-Tracking Lens: a Zoomable User Interface for Animated Bubble Charts

    Spot-Tracking Lens: a Zoomable User Interface for Animated Bubble Charts

    Spot-Tracking Lens: A Zoomable User Interface for Animated Bubble Charts Yueqi Hu, Tom Polk, Jing Yang ∗ Ye Zhao y Shixia Liu z University of North Carolina at Charlotte Kent State University Tshinghua University Figure 1: A screenshot of the spot-tracking lens. The lens is following Belarus in the year 1995. Egypt, Syria, and Tunisia are automatically labeled since they move faster than Belarus. Ukraine and Russia are tracked. They are visible even when they go out of the spotlight. The color coding of countries is the same as in Gapminder[1], in which countries from the same geographic region share the same color. The world map on the top right corner provides a legend of the colors. ABSTRACT thus see more details. Zooming brings many benefits to visualiza- Zoomable user interfaces are widely used in static visualizations tion: it allows users to examine the context of an interesting object and have many benefits. However, they are not well supported in by zooming in the area where the object resides; labels overcrowded animated visualizations due to problems such as change blindness in the original view can be displayed without overlaps after zoom- and information overload. We propose the spot-tracking lens, a new ing in; it allows users to focus on a local area and thus reduce their zoomable user interface for animated bubble charts, to tackle these cognitive load. problems. It couples zooming with automatic panning and provides In spite of these benefits, zooming is not as well supported in an- a rich set of auxiliary techniques to enhance its effectiveness.
  • Release Notes for Fedora 15

    Release Notes for Fedora 15

    Fedora 15 Release Notes Release Notes for Fedora 15 Edited by The Fedora Docs Team Copyright © 2011 Red Hat, Inc. and others. The text of and illustrations in this document are licensed by Red Hat under a Creative Commons Attribution–Share Alike 3.0 Unported license ("CC-BY-SA"). An explanation of CC-BY-SA is available at http://creativecommons.org/licenses/by-sa/3.0/. The original authors of this document, and Red Hat, designate the Fedora Project as the "Attribution Party" for purposes of CC-BY-SA. In accordance with CC-BY-SA, if you distribute this document or an adaptation of it, you must provide the URL for the original version. Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert, Section 4d of CC-BY-SA to the fullest extent permitted by applicable law. Red Hat, Red Hat Enterprise Linux, the Shadowman logo, JBoss, MetaMatrix, Fedora, the Infinity Logo, and RHCE are trademarks of Red Hat, Inc., registered in the United States and other countries. For guidelines on the permitted uses of the Fedora trademarks, refer to https:// fedoraproject.org/wiki/Legal:Trademark_guidelines. Linux® is the registered trademark of Linus Torvalds in the United States and other countries. Java® is a registered trademark of Oracle and/or its affiliates. XFS® is a trademark of Silicon Graphics International Corp. or its subsidiaries in the United States and/or other countries. MySQL® is a registered trademark of MySQL AB in the United States, the European Union and other countries. All other trademarks are the property of their respective owners.
  • Maplogic Layout Manager User's Manual

    Maplogic Layout Manager User's Manual

    MAPLOGIC CORPORATION GIS Software Solutions MapLogic Layout Manager User’s Manual MapLogic Layout Manager User’s Manual © 2009 MapLogic Corporation All Rights Reserved 330 West Canton Ave., Winter Park, Florida 32789 Phone (407) 657-1250 • Fax (407) 657-7008 MapLogic Layout Manager is a trademark of MapLogic Corporation. ArcGIS, ArcMap and ArcView are registered trademarks of ESRI. Table of Contents Introduction _____________________________________________________________________ 1 What Is MapLogic Layout Manager? ____________________________________________ 1 MapLogic Layout Manager User Interface ____________________________________________ 2 The Layouts Tab ____________________________________________________________ 2 The MapLogic Layout Manager Toolbar _________________________________________ 3 Element Properties __________________________________________________________ 4 Before You Get Started ____________________________________________________________ 6 How The MapLogic Layout Manager Changes The ArcMap Document_________________ 6 Different Licenses For The MapLogic Layout Manager _____________________________ 6 Basic Concepts ___________________________________________________________________ 8 Multiple Layouts Within The ArcMap Document __________________________________ 8 The Map Series Layout _______________________________________________________ 8 The Map Book Layout _______________________________________________________ 9 New Elements You Can Add To Map Series And Book Layouts _____________________ 10 Two-Sided Map
  • R16 B.TECH CSE IV Year Syllabus

    R16 B.TECH CSE IV Year Syllabus

    R16 B.TECH CSE. JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.TECH. COMPUTER SCIENCE AND ENGINEERING IV YEAR COURSE STRUCTURE & SYLLABUS (R16) Applicable From 2016-17 Admitted Batch IV YEAR I SEMESTER S. No Course Code Course Title L T P Credits 1 CS701PC Data Mining 4 0 0 4 2 CS702PC Principles of Programming Languages 4 0 0 4 3 Professional Elective – II 3 0 0 3 4 Professional Elective – III 3 0 0 3 5 Professional Elective – IV 3 0 0 3 6 CS703PC Data Mining Lab 0 0 3 2 7 PE-II Lab # 0 0 3 2 CS751PC Python Programming Lab CS752PC Android Application Development Lab CS753PC Linux programming Lab CS754PC R Programming Lab CS755PC Internet of Things Lab 8 CS705PC Industry Oriented Mini Project 0 0 3 2 9 CS706PC Seminar 0 0 2 1 Total Credits 17 0 11 24 # Courses in PE - II and PE - II Lab must be in 1-1 correspondence. IV YEAR II SEMESTER Course S. No Course Title L T P Credits Code 1 Open Elective – III 3 0 0 3 2 Professional Elective – V 3 0 0 3 3 Professional Elective – VI 3 0 0 3 4 CS801PC Major Project 0 0 30 15 Total Credits 9 0 30 24 Professional Elective – I CS611PE Mobile Computing CS612PE Design Patterns CS613PE Artificial Intelligence CS614PE Information Security Management (Security Analyst - I) CS615PE Introduction to Analytics (Associate Analytics - I) R16 B.TECH CSE. Professional Elective – II CS721PE Python Programming CS722PE Android Application Development CS723PE Linux Programming CS724PE R Programming CS725PE Internet of Things Professional Elective - III CS731PE Distributed Systems CS732PE Machine Learning CS733PE
  • AGL HMI Framework Architecture Document

    AGL HMI Framework Architecture Document

    AGL HMI Framework Architecture Document Version Date 0.9 2019/x/x AGL HMI Framework Architecture Document 1. HMI Framework overview ........................................................................................ 4 1.1. Oerview .............................................................................................................. 4 1.1.1. HMI-FW Components ................................................................................. 5 1.1.2. Related components ..................................................................................... 6 2. GUI-library ................................................................................................................ 7 2.1. Overview ............................................................................................................ 7 2.1.1. Related external components ....................................................................... 7 2.1.2. Internal Components ................................................................................... 8 2.2. Graphics functions .............................................................................................. 9 2.2.1. Procedure necessary for HMI-Apps ............................................................ 9 2.2.2. Software configuration of GUI-lib ............................................................ 10 2.3. Sound functions ................................................................................................ 12 2.4. Input functions .................................................................................................