org.jhotdraw.draw.tool
Interface DragTracker

All Superinterfaces:

java.util.EventListener, java.awt.event.KeyListener, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, Tool

All Known Implementing Classes:

DefaultDragTracker, DnDTracker

@NotNull
public interface DragTracker
extends Tool

A drag tracker provides the behavior for dragging selected figures to the SelectionTool.

Design Patterns

Strategy
The different behavior states of the selection tool are implemented by trackers.
Context: SelectionTool; State: DragTracker, HandleTracker, SelectAreaTracker.

Chain of responsibility
Mouse and keyboard events of the user occur on a drawing view, and are preprocessed by the DragTracker of a SelectionTool. DragTracker invokes "track" methods on a Handle which in turn changes an aspect of a figure. Client: SelectionTool; Handler: DragTracker, Handle.

Version:

$Id: DragTracker.java -1 $

Author:

Werner Randelshofer

Method Summary

void	setDraggedFigure(Figure f)

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, mousePressed, mouseReleased

Methods inherited from interface java.awt.event.MouseMotionListener

mouseDragged, mouseMoved

Methods inherited from interface java.awt.event.KeyListener

keyPressed, keyReleased, keyTyped

Method Detail

setDraggedFigure

void setDraggedFigure(Figure f)