jfig.commands
Class ScaleObjectCommand

java.lang.Object
  jfig.commands.Command
      jfig.commands.ScaleObjectCommand

public class ScaleObjectCommand

extends Command

scale a FIG object.

ScaleObjectCommand allows to scale most FIG objects in several modes.

Field Summary

protected double	factor_x
protected double	factor_y
protected int	n_points
protected FigObject	object
protected FigAttribs	oldAttribs
protected java.awt.Point[]	oldPoints
protected java.awt.Point	origin
protected java.awt.Point	P1
protected java.awt.Point	P2
protected boolean	restricted

Fields inherited from class jfig.commands.Command

editor, objectCanvas, ready

Constructor Summary

ScaleObjectCommand(FigBasicEditor editor, FigCanvas objectCanvas)

Method Summary

void	execute() execute the current editor command
java.lang.String	getDescription() one-line description of this command
FigObject[]	getModifiedObjects() return an array-wrapped reference to the FigObject (to be) scaled by this command.
java.awt.Point[]	getScaledPoints(java.awt.Point[] oldPoints, java.awt.Point origin, java.awt.Point start, java.awt.Point end)
void	mousePressed(FigCanvasEvent evt) react to a mouse click on the editor canvas
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

oldAttribs

protected FigAttribs oldAttribs

P1

protected java.awt.Point P1

P2

protected java.awt.Point P2

origin

protected java.awt.Point origin

oldPoints

protected java.awt.Point[] oldPoints

factor_x

protected double factor_x

factor_y

protected double factor_y

restricted

protected boolean restricted

Constructor Detail

ScaleObjectCommand

public ScaleObjectCommand(FigBasicEditor editor,
                          FigCanvas objectCanvas)

Method Detail

getModifiedObjects

public FigObject[] getModifiedObjects()

return an array-wrapped reference to the FigObject (to be) scaled by this command. The FigObject reference may be null.

Overrides:

getModifiedObjects in class Command

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

getScaledPoints

public java.awt.Point[] getScaledPoints(java.awt.Point[] oldPoints,
                                        java.awt.Point origin,
                                        java.awt.Point start,
                                        java.awt.Point end)

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

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