org.jhotdraw.draw.tool
Class DefaultDragTracker

java.lang.Object
  org.jhotdraw.beans.AbstractBean
      org.jhotdraw.draw.tool.AbstractTool
          org.jhotdraw.draw.tool.DefaultDragTracker

All Implemented Interfaces:

java.awt.event.KeyListener, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.io.Serializable, java.lang.Cloneable, java.util.EventListener, DragTracker, Tool

public class DefaultDragTracker
extends AbstractTool
implements DragTracker

DefaultDragTracker implements interactions with the content area of a Figure.

The DefaultDragTracker handles one of the three states of the SelectionTool. It comes into action, when the user presses the mouse button over the content area of a Figure.

Design pattern:
Name: Chain of Responsibility.
Role: Handler.
Partners: SelectionTool as Handler, SelectAreaTracker as Handler, HandleTracker as Handler.

Design pattern:
Name: State.
Role: State.
Partners: SelectAreaTracker as State, SelectionTool as Context, HandleTracker as State.

Version:

$Id: DefaultDragTracker.java -1 $

Author:

Werner Randelshofer

See Also:

SelectionTool, Serialized Form

Field Summary

protected Figure	anchorFigure
protected java.awt.geom.Point2D.Double	anchorOrigin The anchorOrigin holds the origin of all dragged figures of the mousePressed event.
protected java.awt.geom.Point2D.Double	anchorPoint The anchorPoint holds the location of the mouse of the mousePressed event.
protected java.awt.geom.Rectangle2D.Double	dragRect The drag rectangle encompasses the bounds of all dragged figures.
protected java.awt.geom.Point2D.Double	previousOrigin The previousOrigin holds the origin of all dragged figures of the previous mouseDragged event.
protected java.awt.geom.Point2D.Double	previousPoint The previousPoint holds the location of the mouse of the previous mouseDragged event.

Fields inherited from class org.jhotdraw.draw.tool.AbstractTool

anchor, editor, isWorking, listenerList

Fields inherited from class org.jhotdraw.beans.AbstractBean

propertySupport

Constructor Summary

DefaultDragTracker()

DefaultDragTracker(Figure figure)
Creates a new instance.

Method Summary

void	mouseDragged(java.awt.event.MouseEvent evt)
void	mouseMoved(java.awt.event.MouseEvent evt)
void	mousePressed(java.awt.event.MouseEvent evt)
void	mouseReleased(java.awt.event.MouseEvent evt)
void	setDraggedFigure(Figure f)

Methods inherited from class org.jhotdraw.draw.tool.AbstractTool

activate, addToolListener, addUndoableEditListener, constrainPoint, constrainPoint, createActionMap, createInputMap, deactivate, draw, editCopy, editCut, editDelete, editDuplicate, editPaste, fireAreaInvalidated, fireAreaInvalidated, fireBoundsInvalidated, fireToolDone, fireToolStarted, getActionMap, getDrawing, getEditor, getInputMap, getToolTipText, getView, isActive, keyPressed, keyReleased, keyTyped, maybeFireBoundsInvalidated, mouseClicked, mouseEntered, mouseExited, removeToolListener, removeUndoableEditListener, setActionMap, setInputMap, supportsHandleInteraction, updateCursor, viewToDrawing

Methods inherited from class org.jhotdraw.beans.AbstractBean

addPropertyChangeListener, addPropertyChangeListener, clone, firePropertyChange, firePropertyChange, firePropertyChange, getPropertyChangeListeners, removePropertyChangeListener, removePropertyChangeListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jhotdraw.draw.tool.Tool

activate, addToolListener, deactivate, draw, editCopy, editCut, editDelete, editDuplicate, editPaste, getToolTipText, removeToolListener, supportsHandleInteraction

Methods inherited from interface java.awt.event.MouseListener

mouseClicked, mouseEntered, mouseExited

Methods inherited from interface java.awt.event.KeyListener

keyPressed, keyReleased, keyTyped

Field Detail

anchorFigure

protected Figure anchorFigure

dragRect

protected java.awt.geom.Rectangle2D.Double dragRect

The drag rectangle encompasses the bounds of all dragged figures.

previousOrigin

protected java.awt.geom.Point2D.Double previousOrigin

The previousOrigin holds the origin of all dragged figures of the previous mouseDragged event. This coordinate is constrained using the Constrainer of the DrawingView.

anchorOrigin

protected java.awt.geom.Point2D.Double anchorOrigin

The anchorOrigin holds the origin of all dragged figures of the mousePressed event.

previousPoint

protected java.awt.geom.Point2D.Double previousPoint

The previousPoint holds the location of the mouse of the previous mouseDragged event. This coordinate is not constrained using the Constrainer of the DrawingView.

anchorPoint

protected java.awt.geom.Point2D.Double anchorPoint

The anchorPoint holds the location of the mouse of the mousePressed event. This coordinate is not constrained using the Constrainer of the DrawingView.

Constructor Detail

DefaultDragTracker

public DefaultDragTracker(Figure figure)

Creates a new instance.

DefaultDragTracker

public DefaultDragTracker()

Method Detail

mouseMoved

public void mouseMoved(java.awt.event.MouseEvent evt)

Specified by:

mouseMoved in interface java.awt.event.MouseMotionListener

Overrides:

mouseMoved in class AbstractTool

mousePressed

public void mousePressed(java.awt.event.MouseEvent evt)

Specified by:

mousePressed in interface java.awt.event.MouseListener

Overrides:

mousePressed in class AbstractTool

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent evt)

Specified by:

mouseDragged in interface java.awt.event.MouseMotionListener

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent evt)

Specified by:

mouseReleased in interface java.awt.event.MouseListener

Overrides:

mouseReleased in class AbstractTool

setDraggedFigure

public void setDraggedFigure(Figure f)

Specified by:

setDraggedFigure in interface DragTracker