edu.neu.ccs.gui
Class DirectApplet

java.lang.Object
  java.awt.Component
      java.awt.Container
          java.awt.Panel
              java.applet.Applet
                  javax.swing.JApplet
                      edu.neu.ccs.gui.DirectApplet

All Implemented Interfaces:

Accessible, ImageObserver, JPTConstants, MenuContainer, RootPaneContainer, Serializable, SwingConstants

Direct Known Subclasses:

JPFApplet

public abstract class DirectApplet

extends JApplet

implements JPTConstants

Class DirectApplet provides a base class for building an applet simply. The designer must build a derived class with one method:

    public Object createGUI()

The object returned by this method should either be a Component or be capable of being converted to such using ComponentFactory.makeComponent. If so, the component will be the content of this applet. If not, an exception will be thrown and displayed in a dialog.

The derived class may, of course, have additional helper data and/or methods.

As of 2.6.0f, DirectApplet will add itself to the count of open frame objects maintained by the JPTFrame class. The rationale for this is discussed in the comments for JPTFrame.

As of 2.6.0g, setSize is called in the built-in init method based on the size of the component returned by createGUI.

In 2.7.0, implements JPTConstants for convenience. This parallels DisplayPanel.

Since:

2.6.0

Version:

2.7.0

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class javax.swing.JApplet

JApplet.AccessibleJApplet

Nested classes inherited from class java.applet.Applet

Applet.AccessibleApplet

Nested classes inherited from class java.awt.Panel

Panel.AccessibleAWTPanel

Nested classes inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

protected Component	component The component returned by createGUI if the initialization call was successful.
protected boolean	initializationSuccessful Was the initialization by createGUI successful?

Fields inherited from class javax.swing.JApplet

accessibleContext, rootPane, rootPaneCheckingEnabled

Fields inherited from class java.applet.Applet

Fields inherited from class java.awt.Panel

Fields inherited from class java.awt.Container

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface edu.neu.ccs.util.JPTConstants

ABOVE, ALIGNMENT, BELOW, BOTTOM_LEFT, BOTTOM_RIGHT, DEFAULT, FONT, INPUT_PROPERTIES, MANDATORY, OPTIONAL, ORIENTATION, TOP_LEFT, TOP_RIGHT, VALUE

Fields inherited from interface javax.swing.SwingConstants

BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

DirectApplet()

Method Summary

private void	createAppletGUI() The standard createAppletGUI method for DirectApplet
abstract Object	createGUI() The object returned by this method should either be a Component or be capable of being converted to such using ComponentFactory.makeComponent.
void	destroy() The default destroy method decrements the count of open frames and applets maintained by JPTFrame.
void	init() The standard init method for DirectApplet.

Methods inherited from class javax.swing.JApplet

addImpl, createRootPane, getAccessibleContext, getContentPane, getGlassPane, getJMenuBar, getLayeredPane, getRootPane, isRootPaneCheckingEnabled, paramString, remove, setContentPane, setGlassPane, setJMenuBar, setLayeredPane, setLayout, setRootPane, setRootPaneCheckingEnabled, update

Methods inherited from class java.applet.Applet

getAppletContext, getAppletInfo, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, getParameterInfo, isActive, newAudioClip, play, play, resize, resize, setStub, showStatus, start, stop

Methods inherited from class java.awt.Panel

addNotify

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paint, paintComponents, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, removeAll, removeContainerListener, removeNotify, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFont, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

initializationSuccessful

protected boolean initializationSuccessful

Was the initialization by createGUI successful?

component

protected Component component

The component returned by createGUI if the initialization call was successful.

Constructor Detail

DirectApplet

public DirectApplet()

Method Detail

createGUI

public abstract Object createGUI()

The object returned by this method should either be a Component or be capable of being converted to such using ComponentFactory.makeComponent. If so, the component will be the content of this applet. If not, an exception will be thrown and displayed in a dialog.

This method must be instantiated in a derived class.

init

public final void init()

The standard init method for DirectApplet.

Executes a job on the event-dispatching thread to create this applet's GUI.

If successful, increments the count of open frames and applets maintained by JPTFrame.

destroy

public void destroy()

The default destroy method decrements the count of open frames and applets maintained by JPTFrame.

If this method is overridden, the override method must make the following call at its end:

    super.destroy();

createAppletGUI

private final void createAppletGUI()

The standard createAppletGUI method for DirectApplet