Class ActiveDialog
- All Implemented Interfaces:
ImageObserver
,MenuContainer
,Serializable
,Accessible
,CSProcess
java.awt.Dialog
with a channel interface.
Process Diagram
Description
ActiveDialog is a process extension of java.awt.Dialog with channels for run-time configuration and event notification. The event channels should be connected to one or more application-specific server processes (instead of registering a passive object as a Listener to this component).All channels are optional. The configure and event channels are settable from a constructor. The event channel delivers a WindowEvent whenever one is generated on the ActiveDialog. Other event channels can be added to notify the occurrence of any other events the component generates (by calling the appropriate addXXXEventChannel method before the process is run). Messages can be sent down the configure channel at any time to configure the component. See the table below for details.
All channels are managed by independent internal handler processes. It is, therefore, safe for a serial application process both to service an event channel and configure the component – no deadlock can occur.
IMPORTANT: it is essential that event channels from this process are always serviced – otherwise the Java Event Thread will be blocked and the GUI will stop responding. A simple way to guarantee this is to use channels configured with overwriting buffers. For example:
final One2OneChannel myMouseEvent = Channel.one2one (new OverWriteOldestBuffer (n)); final ActiveDialog myDialog = new ActiveDialog (); myDialog.addMouseEventChannel (myMouseEvent.out ());This will ensure that the Java Event Thread will never be blocked. Slow or inattentive readers may miss rapidly generated events, but the n most recent events will always be available.
Channel Protocols
Input Channels | ||
---|---|---|
configure | Boolean |
|
ActiveDialog.Configure | Invoke the user-defined Configure.configure method on the dialog. | |
Output Channels | ||
event | WindowEvent | The WindowEvent generated by the component |
containerEvent | ContainerEvent | See the addContainerEventChannel method. |
componentEvent | ComponentEvent | See the addComponentEventChannel method. |
focusEvent | FocusEvent | See the addFocusEventChannel method. |
keyEvent | KeyEvent | See the addKeyEventChannel method. |
mouseEvent | MouseEvent | See the addMouseEventChannel method. |
mouseMotionEvent | MouseEvent | See the addMouseMotionEventChannel method. |
Example
import java.awt.*; import java.awt.event.*; import org.jcsp.lang.*; import org.jcsp.util.*; import org.jcsp.awt.*; public class ActiveDialogExample { public static void main (String argv[]) { final Frame root = new Frame (); final One2OneChannel event = Channel.one2one (new OverWriteOldestBuffer (10)); final ActiveDialog dialog = new ActiveDialog (null, event.out (), root, "ActiveDialog Example"); dialog.setSize (300, 200); dialog.setVisible (true); new Parallel ( new CSProcess[] { dialog, new CSProcess () { public void run () { while (true) { WindowEvent w = (WindowEvent) event.in ().read (); System.out.println (w); } } } } ).run (); } }
- Author:
- P.D. Austin and P.H. Welch
- See Also:
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionstatic interface
This enables general configuration of this component.Nested classes/interfaces inherited from class java.awt.Dialog
Dialog.AccessibleAWTDialog, Dialog.ModalExclusionType, Dialog.ModalityType
Nested classes/interfaces inherited from class java.awt.Window
Window.AccessibleAWTWindow, Window.Type
Nested classes/interfaces inherited from class java.awt.Container
Container.AccessibleAWTContainer
Nested classes/interfaces inherited from class java.awt.Component
Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy
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Field Summary
Fields inherited from class java.awt.Dialog
DEFAULT_MODALITY_TYPE
Fields inherited from class java.awt.Component
accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
Fields inherited from interface java.awt.image.ImageObserver
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH
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Constructor Summary
ConstructorsConstructorDescriptionActiveDialog
(Frame parent) Constructs a new non-modal ActiveDialog with a blank title and no configuration or event channels.ActiveDialog
(Frame parent, boolean modal) Constructs a new ActiveDialog with a blank title and no configuration or event channels.ActiveDialog
(Frame parent, String title) Constructs a new non-modal ActiveDialog with no configuration or event channels.ActiveDialog
(Frame parent, String title, boolean modal) Constructs a new ActiveDialog with no configuration or event channels.ActiveDialog
(ChannelInput configure, ChannelOutput event, Frame parent) Constructs a new non-modal ActiveDialog with a blank title.ActiveDialog
(ChannelInput configure, ChannelOutput event, Frame parent, boolean modal) Constructs a new ActiveDialog with a blank title.ActiveDialog
(ChannelInput configure, ChannelOutput event, Frame parent, String title) Constructs a new non-modal ActiveDialog.ActiveDialog
(ChannelInput configure, ChannelOutput event, Frame parent, String title, boolean modal) Constructs a new ActiveDialog. -
Method Summary
Modifier and TypeMethodDescriptionvoid
addComponentEventChannel
(ChannelOutput componentEvent) Add a new channel to this component that will be used to notify that a ComponentEvent has occurred.void
addContainerEventChannel
(ChannelOutput containerEvent) Add a new channel to this component that will be used to notify that a ContainerEvent has occurred.void
addFocusEventChannel
(ChannelOutput focusEvent) Add a new channel to this component that will be used to notify that a FocusEvent has occurred.void
addKeyEventChannel
(ChannelOutput keyEvent) Add a new channel to this component that will be used to notify that a KeyEvent has occurred.void
addMouseEventChannel
(ChannelOutput mouseEvent) Add a new channel to this component that will be used to notify that a MouseEvent has occurred.void
addMouseMotionEventChannel
(ChannelOutput mouseMotionEvent) Add a new channel to this component that will be used to notify that a MouseMotionEvent has occurred.void
run()
The main body of this process.void
setConfigureChannel
(ChannelInput configure) Sets the configuration channel for this ActiveDialog.Methods inherited from class java.awt.Dialog
addNotify, getAccessibleContext, getModalityType, getTitle, hide, isModal, isResizable, isUndecorated, paramString, setBackground, setModal, setModalityType, setOpacity, setResizable, setShape, setTitle, setUndecorated, setVisible, show, toBack
Methods inherited from class java.awt.Window
addPropertyChangeListener, addPropertyChangeListener, addWindowFocusListener, addWindowListener, addWindowStateListener, applyResourceBundle, applyResourceBundle, createBufferStrategy, createBufferStrategy, dispose, getBackground, getBufferStrategy, getFocusableWindowState, getFocusCycleRootAncestor, getFocusOwner, getFocusTraversalKeys, getIconImages, getInputContext, getListeners, getLocale, getModalExclusionType, getMostRecentFocusOwner, getOpacity, getOwnedWindows, getOwner, getOwnerlessWindows, getShape, getToolkit, getType, getWarningString, getWindowFocusListeners, getWindowListeners, getWindows, getWindowStateListeners, isActive, isAlwaysOnTop, isAlwaysOnTopSupported, isAutoRequestFocus, isFocusableWindow, isFocusCycleRoot, isFocused, isLocationByPlatform, isOpaque, isShowing, isValidateRoot, pack, paint, postEvent, processEvent, processWindowEvent, processWindowFocusEvent, processWindowStateEvent, removeNotify, removeWindowFocusListener, removeWindowListener, removeWindowStateListener, reshape, setAlwaysOnTop, setAutoRequestFocus, setBounds, setBounds, setCursor, setFocusableWindowState, setFocusCycleRoot, setIconImage, setIconImages, setLocation, setLocation, setLocationByPlatform, setLocationRelativeTo, setMinimumSize, setModalExclusionType, setSize, setSize, setType, toFront
Methods inherited from class java.awt.Container
add, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalPolicy, getInsets, getLayout, getMaximumSize, getMinimumSize, getMousePosition, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, print, printComponents, processContainerEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, setLayout, transferFocusDownCycle, update, 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, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, 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, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, requestFocusInWindow, resize, resize, revalidate, setComponentOrientation, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setMaximumSize, setMixingCutoutShape, setName, setPreferredSize, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle
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Constructor Details
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ActiveDialog
Constructs a new non-modal ActiveDialog with a blank title and no configuration or event channels.- Parameters:
parent
- the parent frame for the dialog.
-
ActiveDialog
Constructs a new ActiveDialog with a blank title and no configuration or event channels.- Parameters:
parent
- the parent frame for the dialog.modal
- if true, dialog blocks input to the parent window when shown.
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ActiveDialog
Constructs a new non-modal ActiveDialog with no configuration or event channels.- Parameters:
parent
- the parent frame for the dialog.title
- the title of the dialog.
-
ActiveDialog
Constructs a new ActiveDialog with no configuration or event channels.- Parameters:
parent
- the parent frame for the dialog.title
- the title of the dialog.modal
- if true, dialog blocks input to the parent window when shown.
-
ActiveDialog
Constructs a new non-modal ActiveDialog with a blank title.- Parameters:
configure
- the channel for configuration events (can be null if no configuration is required).event
- the WindowEvent will be output whenever it occurs (can be null if no notification is required).parent
- the parent frame for the dialog.
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ActiveDialog
Constructs a new ActiveDialog with a blank title.- Parameters:
configure
- the channel for configuration events (can be null if no configuration is required).event
- the WindowEvent will be output whenever it occurs (can be null if no notification is required).parent
- the parent frame for the dialog.modal
- if true, dialog blocks input to the parent window when shown.
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ActiveDialog
Constructs a new non-modal ActiveDialog.- Parameters:
configure
- the channel for configuration events (can be null if no configuration is required).event
- the WindowEvent will be output whenever it occurs (can be null if no notification is required).parent
- the parent frame for the dialog.title
- the title of the dialog.
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ActiveDialog
public ActiveDialog(ChannelInput configure, ChannelOutput event, Frame parent, String title, boolean modal) Constructs a new ActiveDialog.- Parameters:
configure
- the channel for configuration events (can be null if no configuration is required).event
- the WindowEvent will be output whenever it occurs (can be null if no notification is required).parent
- the parent frame for the dialog.title
- the title of the dialog.modal
- if true, dialog blocks input to the parent window when shown.
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Method Details
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setConfigureChannel
Sets the configuration channel for this ActiveDialog. This method overwrites any configuration channel set in the constructor.- Parameters:
configure
- the channel for configuration events (can be null if no configuration is required).
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addContainerEventChannel
Add a new channel to this component that will be used to notify that a ContainerEvent has occurred. This should be used instead of registering a ContainerListener with the component. It is possible to add more than one Channel by calling this method multiple times If the channel passed is null, no action will be taken.NOTE: This method must be called before this process is run.
- Parameters:
containerEvent
- the channel down which to send ContainerEvents.
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addComponentEventChannel
Add a new channel to this component that will be used to notify that a ComponentEvent has occurred. This should be used instead of registering a ComponentListener with the component. It is possible to add more than one Channel by calling this method multiple times If the channel passed is null, no action will be taken.NOTE: This method must be called before this process is run.
- Parameters:
componentEvent
- the channel down which to send ComponentEvents.
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addFocusEventChannel
Add a new channel to this component that will be used to notify that a FocusEvent has occurred. This should be used instead of registering a FocusListener with the component. It is possible to add more than one Channel by calling this method multiple times If the channel passed is null, no action will be taken.NOTE: This method must be called before this process is run.
- Parameters:
focusEvent
- the channel down which to send FocusEvents.
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addKeyEventChannel
Add a new channel to this component that will be used to notify that a KeyEvent has occurred. This should be used instead of registering a KeyListener with the component. It is possible to add more than one Channel by calling this method multiple times If the channel passed is null, no action will be taken.NOTE: This method must be called before this process is run.
- Parameters:
keyEvent
- the channel down which to send KeyEvents.
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addMouseEventChannel
Add a new channel to this component that will be used to notify that a MouseEvent has occurred. This should be used instead of registering a MouseListener with the component. It is possible to add more than one Channel by calling this method multiple times If the channel passed is null, no action will be taken.NOTE: This method must be called before this process is run.
- Parameters:
mouseEvent
- the channel down which to send MouseEvents.
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addMouseMotionEventChannel
Add a new channel to this component that will be used to notify that a MouseMotionEvent has occurred. This should be used instead of registering a MouseMotionListener with the component. It is possible to add more than one Channel by calling this method multiple times If the channel passed is null, no action will be taken.NOTE: This method must be called before this process is run.
- Parameters:
mouseMotionEvent
- the channel down which to send MouseMotionEvents.
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run
public void run()The main body of this process.
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