org.jhotdraw.app

Class AbstractView

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JPanel

org.jhotdraw.app.AbstractView

All Implemented Interfaces:

java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, javax.accessibility.Accessible, Disposable, View

Direct Known Subclasses:

DrawView, NetView, ODGView, PertView, SVGView, TeddyView

public abstract class AbstractView
extends javax.swing.JPanel
implements View

This abstract class can be extended to implement a View.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.JPanel

javax.swing.JPanel.AccessibleJPanel

Nested classes/interfaces inherited from class javax.swing.JComponent

javax.swing.JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.concurrent.ExecutorService	executor The executor used to perform background tasks for the View in a controlled manner.
protected java.util.prefs.Preferences	preferences The preferences of the view.
protected java.net.URI	uri The URI of the view.

Fields inherited from class javax.swing.JComponent

listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface org.jhotdraw.app.View

APPLICATION_PROPERTY, ENABLED_PROPERTY, HAS_UNSAVED_CHANGES_PROPERTY, MULTIPLE_OPEN_ID_PROPERTY, SHOWING_PROPERTY, TITLE_PROPERTY, URI_PROPERTY

Fields inherited from interface java.awt.image.ImageObserver

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

Constructor Summary

Constructors

Constructor and Description
AbstractView() Creates a new instance.

Method Summary

Modifier and Type	Method and Description
void	activate() Activates the view.
void	addDisposable(Disposable disposable) Adds a disposable object, which will be disposed when the specified view is disposed.
boolean	canSaveTo(java.net.URI uri) Returns true, if this view can be saved to the specified URI.
void	deactivate() Deactivates the view.
void	dispose() Gets rid of all the resources of the view.
void	execute(java.lang.Runnable worker) Executes the specified runnable on the worker thread of the view.
Application	getApplication() Gets the application to which this view belongs.
javax.swing.JComponent	getComponent() Returns the visual component of the view.
int	getMultipleOpenId() Returns the multiple open id.
java.lang.String	getTitle() Gets the title of the view.
java.net.URI	getURI() Returns the uri which holds the document of the view.
boolean	hasUnsavedChanges() Returns true, if the view has unsaved changes.
void	init() Initializes the view.
boolean	isEmpty() Whether the view is empty.
boolean	isShowing() This is used by Application to keep track if a view is showing.
void	markChangesAsSaved() Marks all changes as saved.
void	removeDisposable(Disposable disposable) Removes a disposable object, which was previously added.
void	setApplication(Application newValue) Sets the application of the view.
protected void	setHasUnsavedChanges(boolean newValue)
void	setMultipleOpenId(int newValue) Sets the multiple open id.
void	setShowing(boolean newValue) This is used by Application to keep track if a view is showing.
void	setTitle(java.lang.String newValue) Sets the title of the view.
void	setURI(java.net.URI newValue) Sets the uri of the view.
void	start() Starts the view.
void	stop() Stops the view.

Methods inherited from class javax.swing.JPanel

getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, 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, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, 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, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jhotdraw.app.View

addPropertyChangeListener, clear, getActionMap, isEnabled, read, removePropertyChangeListener, setActionMap, setEnabled, write

Field Detail

executor

protected java.util.concurrent.ExecutorService executor

The executor used to perform background tasks for the View in a controlled manner. This executor ensures that all background tasks are executed sequentually.

preferences

protected java.util.prefs.Preferences preferences

The preferences of the view.

uri

protected java.net.URI uri

The URI of the view. Has a null value, if the view has not been loaded from a URI or has not been saved yet.

Constructor Detail

AbstractView

public AbstractView()

Creates a new instance.

Method Detail

init

public void init()

Initializes the view. This method does nothing, subclasses don't neet to call super.

Specified by:

init in interface View

start

public void start()

Starts the view. This method does nothing, subclasses don't neet to call super.

Specified by:

start in interface View

activate

public void activate()

Activates the view. This method does nothing, subclasses don't neet to call super.

Specified by:

activate in interface View

deactivate

public void deactivate()

Deactivates the view. This method does nothing, subclasses don't neet to call super.

Specified by:

deactivate in interface View

stop

public void stop()

Stops the view. This method does nothing, subclasses don't neet to call super.

Specified by:

stop in interface View

dispose

public void dispose()

Gets rid of all the resources of the view. No other methods should be invoked on the view afterwards.

Specified by:

dispose in interface Disposable

Specified by:

dispose in interface View

canSaveTo

public boolean canSaveTo(java.net.URI uri)

Description copied from interface: View

Returns true, if this view can be saved to the specified URI. A reason why the view can't be saved to a URI, is that the view is unable to write to a file-URI with the given filename extension without losing data.

The SaveAction uses this method to decide, whether to display a save dialog before saving the URI.

Specified by:

canSaveTo in interface View

Parameters:

uri - An URI. If this parameter is null, a NullPointerException is thrown.

getURI

public java.net.URI getURI()

Description copied from interface: View

Returns the uri which holds the document of the view.

Specified by:

getURI in interface View

setURI

public void setURI(java.net.URI newValue)

Description copied from interface: View

Sets the uri of the view. This is a bound property.

Specified by:

setURI in interface View

setApplication

public void setApplication(Application newValue)

Description copied from interface: View

Sets the application of the view. By convention, this is only invoked by Application.add() and Application.remove(). This is a bound property.

Specified by:

setApplication in interface View

getApplication

public Application getApplication()

Description copied from interface: View

Gets the application to which this view belongs.

Specified by:

getApplication in interface View

getComponent

public javax.swing.JComponent getComponent()

Description copied from interface: View

Returns the visual component of the view.

Specified by:

getComponent in interface View

isEmpty

public boolean isEmpty()

Description copied from interface: View

Whether the view is empty. A view is considered empty if the application has implicit consent from the user to reuse or destroy the view at any time. For example, an application may open an empty view immediately after startup. If the user chooses to open a document, the document is opened in this view rather than in a new view.

If this method returns true, OpenFileAction and similar actions will open a file in this view, instead of opening a new view.

Specified by:

isEmpty in interface View

Returns:

True if the view can be reused by open actions.

hasUnsavedChanges

public boolean hasUnsavedChanges()

Returns true, if the view has unsaved changes. This is a bound property.

Specified by:

hasUnsavedChanges in interface View

setHasUnsavedChanges

protected void setHasUnsavedChanges(boolean newValue)

execute

public void execute(java.lang.Runnable worker)

Executes the specified runnable on the worker thread of the view. Execution is performed sequentially in the same sequence as the runnables have been passed to this method.

Specified by:

execute in interface View

setMultipleOpenId

public void setMultipleOpenId(int newValue)

Description copied from interface: View

Sets the multiple open id. The id is used to help distinguish multiply opened views. The id should be displayed in the title of the view.

Specified by:

setMultipleOpenId in interface View

getMultipleOpenId

public int getMultipleOpenId()

Description copied from interface: View

Returns the multiple open id. If a view is open only once this should be 1.

Specified by:

getMultipleOpenId in interface View

setShowing

public void setShowing(boolean newValue)

Description copied from interface: View

This is used by Application to keep track if a view is showing.

Specified by:

setShowing in interface View

isShowing

public boolean isShowing()

Description copied from interface: View

This is used by Application to keep track if a view is showing.

Specified by:

isShowing in interface View

Overrides:

isShowing in class java.awt.Component

markChangesAsSaved

public void markChangesAsSaved()

Description copied from interface: View

Marks all changes as saved. This changes the state of hasUnsavedChanges to false.

Specified by:

markChangesAsSaved in interface View

setTitle

public void setTitle(java.lang.String newValue)

Description copied from interface: View

Sets the title of the view.

The title is generated by the application, based on the current URI of the view. The application ensures that the title uniquely identifies each open view.

The application displays the title in the title bar of the view window and in all windows which are associated to the view.

This is a bound property.

Specified by:

setTitle in interface View

getTitle

public java.lang.String getTitle()

Description copied from interface: View

Gets the title of the view.

Specified by:

getTitle in interface View

addDisposable

public void addDisposable(Disposable disposable)

Adds a disposable object, which will be disposed when the specified view is disposed.

Specified by:

addDisposable in interface View

Parameters:

disposable -

removeDisposable

public void removeDisposable(Disposable disposable)

Removes a disposable object, which was previously added.

Specified by:

removeDisposable in interface View

Parameters:

disposable -