org.jhotdraw.draw.handle

Class AbstractHandle

java.lang.Object

org.jhotdraw.draw.handle.AbstractHandle

All Implemented Interfaces:

java.awt.event.KeyListener, java.util.EventListener, FigureListener, Handle

Direct Known Subclasses:

AbstractConnectionHandle, AbstractRotateHandle, BezierControlPointHandle, BezierNodeHandle, BezierOutlineHandle, BezierScaleHandle, BoundsOutlineHandle, ConnectorHandle, ConvexHullOutlineHandle, DragHandle, LinkHandle, LocatorHandle, ODGPathOutlineHandle, ODGRectRadiusHandle, OrientationHandle, RoundRectangleRadiusHandle, SVGPathOutlineHandle, SVGRectRadiusHandle, TextOverflowHandle

public abstract class AbstractHandle
extends java.lang.Object
implements Handle, FigureListener

This abstract class can be extended to implement a Handle.

Constructor Summary

Constructors

Constructor and Description
AbstractHandle(Figure owner) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
void	addHandleListener(HandleListener l) Adds a listener for this handle.
void	areaInvalidated(FigureEvent evt) Sent when a region used by the figure needs to be repainted.
void	attributeChanged(FigureEvent e) Sent when an attribute of the figure has changed.
boolean	contains(java.awt.Point p) Tests if a point is contained in the handle.
java.util.Collection<Handle>	createSecondaryHandles() Creates secondary handles.
void	dispose() Disposes the resources aquired by the handler.
void	draw(java.awt.Graphics2D g) Draws this handle.
void	figureAdded(FigureEvent e) Sent when a figure was added.
void	figureChanged(FigureEvent evt) Sent when the bounds or shape of a figure has changed.
void	figureHandlesChanged(FigureEvent e) Sent when handles of a Figure have been added, removed or replaced.
void	figureRemoved(FigureEvent e) Sent when a figure was removed.
void	figureRequestRemove(FigureEvent e) Sent when a figure requests to be removed.
java.awt.Rectangle	getBounds() Returns the bounding box of the handle.
java.awt.Cursor	getCursor() Returns a cursor for the handle.
java.awt.Rectangle	getDrawingArea() Returns the drawing area of the handle.
DrawingEditor	getEditor()
Figure	getOwner() Returns the owner of this handle.
java.lang.String	getToolTipText(java.awt.Point p) Returns a tooltip for the specified location.
DrawingView	getView()
void	invalidate() Invalidates the handle.
boolean	isCombinableWith(Handle handle) Returns true, if the given handle is an instance of the same class or of a subclass of this handle,.
void	keyPressed(java.awt.event.KeyEvent evt)
void	keyReleased(java.awt.event.KeyEvent evt)
void	keyTyped(java.awt.event.KeyEvent evt)
void	removeHandleListener(HandleListener l) Removes a listener for this handle.
void	setToolTipText(java.lang.String newValue) Changes the default tool tip text returned by AbstractHandle.
void	setView(DrawingView view) Sets the view of the handle.
void	trackDoubleClick(java.awt.Point p, int modifiersEx) Tracks a double click.
void	viewTransformChanged() This method is invoked by the drawing view, when its transform has changed.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.jhotdraw.draw.handle.Handle

trackEnd, trackStart, trackStep

Constructor Detail

AbstractHandle

public AbstractHandle(Figure owner)

Creates a new instance.

Method Detail

addHandleListener

public void addHandleListener(HandleListener l)

Adds a listener for this handle.

Specified by:

addHandleListener in interface Handle

removeHandleListener

public void removeHandleListener(HandleListener l)

Removes a listener for this handle.

Specified by:

removeHandleListener in interface Handle

getOwner

public Figure getOwner()

Description copied from interface: Handle

Returns the owner of this handle.

Specified by:

getOwner in interface Handle

setView

public void setView(@Nullable
                    DrawingView view)

Description copied from interface: Handle

Sets the view of the handle.

Specified by:

setView in interface Handle

getView

@Nullable
public DrawingView getView()

getEditor

public DrawingEditor getEditor()

draw

public void draw(java.awt.Graphics2D g)

Draws this handle.

Specified by:

draw in interface Handle

contains

public boolean contains(java.awt.Point p)

Description copied from interface: Handle

Tests if a point is contained in the handle.

Specified by:

contains in interface Handle

invalidate

public void invalidate()

Description copied from interface: Handle

Invalidates the handle. This method informs its listeners that its current display box is invalid and should be refreshed.

Specified by:

invalidate in interface Handle

dispose

public void dispose()

Description copied from interface: Handle

Disposes the resources aquired by the handler.

Specified by:

dispose in interface Handle

areaInvalidated

public void areaInvalidated(FigureEvent evt)

Sent when a region used by the figure needs to be repainted. The implementation of this method assumes that the handle is located on the bounds of the figure or inside the figure. If the handle is located elsewhere this method must be reimpleted by the subclass.

Specified by:

areaInvalidated in interface FigureListener

figureAdded

public void figureAdded(FigureEvent e)

Sent when a figure was added.

Specified by:

figureAdded in interface FigureListener

figureRemoved

public void figureRemoved(FigureEvent e)

Sent when a figure was removed.

Specified by:

figureRemoved in interface FigureListener

figureRequestRemove

public void figureRequestRemove(FigureEvent e)

Sent when a figure requests to be removed.

Specified by:

figureRequestRemove in interface FigureListener

figureChanged

public void figureChanged(FigureEvent evt)

Sent when the bounds or shape of a figure has changed.

Specified by:

figureChanged in interface FigureListener

getCursor

public java.awt.Cursor getCursor()

Returns a cursor for the handle.

Specified by:

getCursor in interface Handle

isCombinableWith

public boolean isCombinableWith(Handle handle)

Returns true, if the given handle is an instance of the same class or of a subclass of this handle,.

Specified by:

isCombinableWith in interface Handle

keyTyped

public void keyTyped(java.awt.event.KeyEvent evt)

Specified by:

keyTyped in interface java.awt.event.KeyListener

keyReleased

public void keyReleased(java.awt.event.KeyEvent evt)

Specified by:

keyReleased in interface java.awt.event.KeyListener

keyPressed

public void keyPressed(java.awt.event.KeyEvent evt)

Specified by:

keyPressed in interface java.awt.event.KeyListener

getBounds

public final java.awt.Rectangle getBounds()

Description copied from interface: Handle

Returns the bounding box of the handle. Note: The bounding box must be returned in the coordinate system of the DrawingView.

Specified by:

getBounds in interface Handle

getDrawingArea

public java.awt.Rectangle getDrawingArea()

Description copied from interface: Handle

Returns the drawing area of the handle. Note: The drawing area must be returned in the coordinate system of the DrawingView.

Specified by:

getDrawingArea in interface Handle

trackDoubleClick

public void trackDoubleClick(java.awt.Point p,
                             int modifiersEx)

Tracks a double click.

Specified by:

trackDoubleClick in interface Handle

attributeChanged

public void attributeChanged(FigureEvent e)

Description copied from interface: FigureListener

Sent when an attribute of the figure has changed.

Specified by:

attributeChanged in interface FigureListener

viewTransformChanged

public void viewTransformChanged()

Description copied from interface: Handle

This method is invoked by the drawing view, when its transform has changed. This means, that DrawingView.viewToDrawing and DrawingView.drawingToView will return different values than they did before.

Specified by:

viewTransformChanged in interface Handle

createSecondaryHandles

public java.util.Collection<Handle> createSecondaryHandles()

Description copied from interface: Handle

Creates secondary handles.

Specified by:

createSecondaryHandles in interface Handle

getToolTipText

public java.lang.String getToolTipText(java.awt.Point p)

Returns a tooltip for the specified location. By default, AbstractHandle returns null.

Specified by:

getToolTipText in interface Handle

setToolTipText

public void setToolTipText(java.lang.String newValue)

Changes the default tool tip text returned by AbstractHandle.

figureHandlesChanged

public void figureHandlesChanged(FigureEvent e)

Description copied from interface: FigureListener

Sent when handles of a Figure have been added, removed or replaced.

DrawingViews listen to this event to repopulate the Handles.

A Figure should not fire this event, if just the state or the location of Handle has changed.

Specified by:

figureHandlesChanged in interface FigureListener