jfig.commands
Class BreakCompoundCommand

java.lang.Object
  jfig.commands.Command
      jfig.commands.BreakCompoundCommand

public class BreakCompoundCommand

extends Command

break a FIG compound into its parts.

BreakCompoundCommand breaks a FIG compound object into its parts, deletes the compound, and inserts all parts into the editor's object list.

To allow for undo, the original compound with its part-list is silently kept by this command object.

Field Summary

protected int	n_points
protected FigObject	object
protected java.awt.Point	P1
protected java.awt.Point	P2
protected java.awt.Point	P3

Fields inherited from class jfig.commands.Command

editor, objectCanvas, ready

Constructor Summary

BreakCompoundCommand(FigBasicEditor editor, FigCanvas objectCanvas)

Method Summary

void	execute() execute the current editor command
FigObject	findNextCompound(java.awt.Point P, FigObject object)
java.lang.String	getDescription() one-line description of this command
FigObject[]	getModifiedObjects() return an array-wrapped reference to the compound target object of this BreakCompoundObjectCommand.
void	mousePressed(FigCanvasEvent evt) react to a mouse click on the editor canvas
void	setCompound(FigCompound compound)
void	showAllCompounds()
java.lang.String	toString() return a (possibly verbose) description of this Command object
void	undo() undo this command

Methods inherited from class jfig.commands.Command

cancel, isReady, message, notifyEditor, statusMessage

Methods inherited from class java.lang.Object

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

Field Detail

n_points

protected int n_points

object

protected FigObject object

P1

protected java.awt.Point P1

P2

protected java.awt.Point P2

P3

protected java.awt.Point P3

Constructor Detail

BreakCompoundCommand

public BreakCompoundCommand(FigBasicEditor editor,
                            FigCanvas objectCanvas)

Method Detail

showAllCompounds

public void showAllCompounds()

getModifiedObjects

public FigObject[] getModifiedObjects()

return an array-wrapped reference to the compound target object of this BreakCompoundObjectCommand. Note that the compound will have been unpacked once execute() has been called. It is possible to check for this situation by traversing the objectList. After execute(), the compound will have been deleted from the objectList.

Overrides:

getModifiedObjects in class Command

setCompound

public void setCompound(FigCompound compound)

execute

public void execute()

Description copied from class: Command

execute the current editor command

This method is empty for class Command.

Overrides:

execute in class Command

undo

public void undo()

Description copied from class: Command

undo this command

Try to undo this command as far as possible. Don't try to undo() a command that has never been execute()d before. This method is empty for class Command.

Overrides:

undo in class Command

mousePressed

public void mousePressed(FigCanvasEvent evt)

Description copied from class: Command

react to a mouse click on the editor canvas

This method provides the central callback from the editor to its current command object. Passing a FigCanvasEvent parameter, the editor provides information both about the screen coordinates and the world coordinates of the mouse event.

Naturally, mouse presses are ignored for class Command.

Overrides:

mousePressed in class Command

findNextCompound

public FigObject findNextCompound(java.awt.Point P,
                                  FigObject object)

getDescription

public java.lang.String getDescription()

Description copied from class: Command

one-line description of this command

return a one-line desription of this command, e.g. to label the undo/redo buttons, if any

Overrides:

getDescription in class Command

toString

public java.lang.String toString()

Description copied from class: Command

return a (possibly verbose) description of this Command object

Overrides:

toString in class Command