How to Use Buttons, Check Boxes, and Radio Buttons (The Java. The following table shows the Swing- defined Abstract. Button subclasses that you might want to use: Note: If you want to collect a group of buttons into a row or column, then you should check out tool bars. The GUI Toolkit, Framework Page User interfaces occupy an important part of software development. This page provides a comprehensive reference on toolkits for. IconDemoApp demonstrates icons used in the following ways: As a GUI element attached to a button (the thumbnail images on the buttons). To display an image (the five. Java GUI Applications Learning Trail What are Java GUI applications? A Java GUI application uses the standard Java components GUI component set, Swing, and is. Next, it describes the small amount of API that JButton adds to Abstract. Button. After that, this section shows you how to use specialized API to implement check boxes and radio buttons. Here is a picture of an application that displays three buttons: Try this: Click the Launch button to run the Button Demo using. Java. Alternatively, to compile and run the example yourself, consult the example index. Click the left button. Learn to create a simple desktop application with a GUI interface and functionality that calculates overtime pay using basic features of the NetBeans IDE. GUI application in java, which enter the details of a student and on the submit display the details of the student. In this page you will learn to build a basic GUI application in Python step by step. The aim is: Mastering most common GUI techniques (widgets layout, GUI constraints. ![]() It disables the middle button (and itself, since it is no longer useful) and enables the right button. Click the right button. It enables the middle button and the left button, and disables itself. As the Button. Demo example shows, a Swing button can display both text and an image. In Button. Demo, each button has its text in a different place, relative to its image. The underlined letter in each button's text shows the mnemonic — the keyboard alternative — for each button. In most look and feels, the user can click a button by pressing the Alt key and the mnemonic.
![]() For example, Alt- M would click the Middle button in Button. Demo. When a button is disabled, the look and feel automatically generates the button's disabled appearance. However, you could provide an image to be substituted for the normal image. For example, you could provide gray versions of the images used in the left and right buttons. How you implement event handling depends on the type of button you use and how you use it. Generally, you implement an. For check boxes you usually use an. Below is the code from. Button. Demo. java that creates the buttons in the previous example and reacts to button clicks. The bold code is the code that would remain if the buttons had no images.//In initialization code. Image. Icon left. Button. Icon = create. Image. Icon(. The default button typically has a highlighted appearance and acts clicked whenever the top- level container has the keyboard focus and the user presses the Return or Enter key. Here is a picture of a dialog, implemented in the List. Dialog example, in which the Set button is the default button: You set the default button by invoking the set. Default. Button method on a top- level container's root pane. ![]() Here is the code that sets up the default button for the List. Dialog example: //In the constructor for a JDialog subclass. Root. Pane(). set. Default. Button(set. Button). The exact implementation of the default button feature depends on the look and feel. For example, in the Windows look and feel, the default button changes to whichever button has the focus, so that pressing Enter clicks the focused button. When no button has the focus, the button you originally specified as the default button becomes the default button again. The. JCheck. Box class provides support for check box buttons. ![]() You can also put check boxes in menus, using the. JCheck. Box. Menu. Item class. Because JCheck. Box and JCheck. Box. Menu. Item inherit from Abstract. Button, Swing check boxes have all the usual button characteristics, as discussed earlier in this section. For example, you can specify images to be used in check boxes. Check boxes are similar to radio buttons but their selection model is different, by convention. Any number of check boxes in a group — none, some, or all — can be selected. A group of radio buttons, on the other hand, can have only one button selected. Here is a picture of an application that uses four check boxes to customize a cartoon: Try this: Click the Launch button to run the Check. Box Demo using. Java. Alternatively, to compile and run the example yourself, consult the example index. Click the Chin button or press Alt- c. The Chin check box becomes unselected, and the chin disappears from the picture. The other check boxes remain selected. This application has one item listener that listens to all the check boxes. Each time the item listener receives an event, the application loads a new picture that reflects the current state of the check boxes. A check box generates one item event and one action event per click. Usually, you listen only for item events, since they let you determine whether the click selected or deselected the check box. Below is the code from. Check. Box. Demo. In initialization code. Button = new JCheck. Box(. The Swing release supports radio buttons with the. JRadio. Button and. Button. Group classes. To put a radio button in a menu, use the. JRadio. Button. Menu. Item class. Other ways of displaying one- of- many choices are combo boxes and lists. Radio buttons look similar to check boxes, but, by convention, check boxes place no limits on how many items can be selected at a time. Because JRadio. Button inherits from Abstract. Button, Swing radio buttons have all the usual button characteristics, as discussed earlier in this section. For example, you can specify the image displayed in a radio button. Here is a picture of an application that uses five radio buttons to let you choose which kind of pet is displayed: Try this: Click the Launch button to run the Radio. Button Demo using. Java. Alternatively, to compile and run the example yourself, consult the example index. Click the Dog button or press Alt- d. The Dog button becomes selected, which makes the Bird button become unselected. The picture switches from a bird to a dog. This application has one action listener that listens to all the radio buttons. Each time the action listener receives an event, the application displays the picture for the radio button that was just clicked. Each time the user clicks a radio button (even if it was already selected), the button fires an. One or two. item events also occur — one from the button that was just selected, and another from the button that lost the selection (if any). Usually, you handle radio button clicks using an action listener. Below is the code from. Radio. Button. Demo. In initialization code. Create the radio buttons. The Button. Group takes care of unselecting the previously selected button when the user selects another button in the group. You should generally initialize a group of radio buttons so that one is selected. However, the API doesn't enforce this rule — a group of radio buttons can have no initial selection. Once the user has made a selection, exactly one button is selected from then on. The following tables list the commonly used button- related API. Other methods you might call, such as set. Font and set. Foreground, are listed in the API tables in The JComponent Class. The API for using buttons falls into these categories: Method or Constructor. Purposevoid set. Horizontal. Alignment(int)void set. Vertical. Alignment(int)int get. Horizontal. Alignment()int get. Vertical. Alignment()Set or get where in the button its contents should be placed. The Abstract. Button class allows any one of the following values for horizontal alignment: RIGHT, LEFT, CENTER (the default), LEADING, and TRAILING. For vertical alignment: TOP, CENTER (the default), and BOTTOM. Horizontal. Text. Position(int)void set. Vertical. Text. Position(int)int get. Horizontal. Text. Position()int get. Vertical. Text. Position()Set or get where the button's text should be placed, relative to the button's image. The Abstract. Button class allows any one of the following values for horizontal position: LEFT, CENTER, RIGHT, LEADING, and TRAILING (the default). For vertical position: TOP, CENTER (the default), and BOTTOM. Margin(Insets)Insets get. Margin()Set or get the number of pixels between the button's border and its contents. Focus. Painted(boolean)boolean is. Focus. Painted()Set or get whether the button should look different when it has the focus. Border. Painted(boolean)boolean is. Border. Painted()Set or get whether the border of the button should be painted. Icon. Text. Gap(int)int get. Icon. Text. Gap()Set or get the amount of space between the text and the icon displayed in this button. Constructor. Purpose. JCheck. Box(Action)JCheck. Box(String)JCheck. Box(String, boolean)JCheck. Box(Icon)JCheck. Box(Icon, boolean)JCheck. Box(String, Icon)JCheck. Box(String, Icon, boolean)JCheck. Box()Create a JCheck. Box instance. The string argument specifies the text, if any, that the check box should display. Similarly, the Icon argument specifies the image that should be used instead of the look and feel's default check box image. Specifying the boolean argument as true initializes the check box to be selected. If the boolean argument is absent or false, then the check box is initially unselected. JCheck. Box. Menu. Item(Action)JCheck. Box. Menu. Item(String)JCheck. Box. Menu. Item(String, boolean)JCheck. Box. Menu. Item(Icon)JCheck. Box. Menu. Item(String, Icon)JCheck. Box. Menu. Item(String, Icon, boolean)JCheck. Box. Menu. Item()Create a JCheck. Box. Menu. Item instance. The arguments are interpreted in the same way as the arguments to the JCheck. Box constructors, except that any specified icon is shown in addition to the normal check box icon. Constructor. Purpose. JRadio. Button(Action)JRadio. Button(String)JRadio. Button(String, boolean)JRadio. Button(Icon)JRadio. Button(Icon, boolean)JRadio. Button(String, Icon)JRadio. Button(String, Icon, boolean)JRadio. Button()Create a JRadio. Button instance. The string argument specifies the text, if any, that the radio button should display. Similarly, the Icon argument specifies the image that should be used instead of the look and feel's default radio button image. Specifying the boolean argument as true initializes the radio button to be selected, subject to the approval of the Button. Group object. If the boolean argument is absent or false, then the radio button is initially unselected. JRadio. Button. Menu. Item(Action)JRadio. Button. Menu. Item(String)JRadio. Button. Menu. Item(Icon)JRadio. Button. Menu. Item(String, Icon)JRadio. Button. Menu. Item()Create a JRadio. Free GUI Libraries and Source Code (thefreecountry. The libraries and source code listed here allow you to design a graphical user interface. GUI, for your application at a high level, and perhaps non- operating system specific. This eases your coding, and might make your application portable among. Some of the libraries here may also. GUI builder, which allow you to design the appearance of your application visually. It provides the. facility to create and manipulate a large number of GUI primitives like dialog boxes, labels, buttons, text, multi- line boxes, list boxes. This library is licensed under the MIT licence. It supports 3. D graphics by using Open. GL. The source code is released under GNU Library. Public License (also known as the LGPL) with exceptions that allow static linking. There is also an interface builder that. C++ code for you. If you write C++ GUI programs for a number of platforms, and want a. Platforms supported include. Win. 32, Mac OS X, Unix- based systems (like Linux, Free. BSD, etc) and Win. CE. The Unix- based versions require either GTK+ or Motif. It has the usual widgets like menus, push buttons. It comes with a code generation tool so that you can design and maintain your interface visually. Platforms supported. Windows 3. 1, 9. 5, 9. NT, X Window, DOS. The GUI may not be used for commercial purposes. Only binaries are supplied. The library does. Hardware platforms tested with it include. Intel x. 86, ARM (ARM7, ARM9, Strong. ARM, x. Scale), Power. PC, MIPS, and M6. K (Dragon. Ball, Cold. Fire). You can run it with support for threads, processes. It has support for built- in resources like bitmaps, icons, fonts. It has a multi- window and messaging mechanism. You can also use menus. Windows resource files, popular image file formats (GIF, JPEG, PNG, Windows BMP, etc), multiple character sets. The graphics API allows you to do raster operations such as create complex regions, draw and fill ellipses, arcs, polygons, etc. There. is also special support for embedded systems such as common I/O operations, byte- order functions, touch screen calibration, etc. The library is. released under the GPL. Be sure to select the GPL open source package when you download. It is designed to by type safe and be as thin. Windows API as possible. It currently requires you. Microsoft Visual C++ compiler (scroll down that page for more information) or the commercial. Visual Studio C++ 7. The language bindings allow you to access all the widgets in Gtk+. The toolkit. is distributed under a modified GPL license that allows the creation of proprietary. The toolkit has been tested on Linux (x. Sparc, Power. PC), Solaris (x. Sparc). Tru. 64, SGI IRIX, HPUX, Windows NT, Windows 2. AIX, Free. BSD, and Unix. Ware. It has a number of controls, icons, images, status line help, tooltips. Open. GL widgets for 3. D graphical manipulation. It does not require any operating system or graphics system support and writes. Very handy if you're developing for the. PCs (Palm, etc). They support the Win. API as well as the. Nano- X API, so you should probably be able to port your Windows programs more easily. It was the toolkit used. Common Desktop Environment, used in commercial versions of Unix. Unlike Turbo Vision, this is graphics based, and has. True. Type, vector and VGA fonts, etc. This particular version is designed for the. Free Pascal Compiler (see the Free Pascal and Delphi Compilers. It works not only on the MSDOS platform, but also on Linux as well (using SVGALIB). It is portable to Windows. POSIX systems (like Linux and the. BSD systems), and Mac OS X and Classic. Requires the GNU C compiler or EGCS. It has various graphics classes. TIFF, TGA, PSD. PNG, SGI, MNG, RAS, PBM, PPM, etc); facilities for drawing graphics; application classes for handling resources, loading. Undo/Redo support; GUI controls; etc. It uses modern C++ features. STL, and name spaces. It is intended to be portable across systems, although at the time. Windows; the Linux and Mac OSX ports are not yet available. The. framework is licensed under the BSD License. It works with Win. Windows 3. 1. The framework is the one described in. Andrew Schulman Programming Series).
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