jfig.commands
Class ZoomRegionCommand

java.lang.Object
  jfig.commands.Command
      jfig.commands.ZoomRegionCommand

public class ZoomRegionCommand

extends Command

zoom into a user-specified region.

Field Summary

protected int	n_points
protected java.awt.Point	P1
protected java.awt.Point	P2

Fields inherited from class jfig.commands.Command

editor, objectCanvas, ready

Constructor Summary

ZoomRegionCommand(FigBasicEditor editor, FigCanvas objectCanvas)

Method Summary

void	execute() zoom into the region specified by this command.
java.lang.String	getDescription() one-line description of this command
void	mousePressed(FigCanvasEvent ME) react to a mouse click on the editor canvas
java.lang.String	toString() toString(): identify this ZoomRegionCommand
void	undo() no use trying to undo a zoom command.

Methods inherited from class jfig.commands.Command

cancel, getModifiedObjects, isReady, message, notifyEditor, statusMessage

Methods inherited from class java.lang.Object

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

Field Detail

P1

protected java.awt.Point P1

P2

protected java.awt.Point P2

n_points

protected int n_points

Constructor Detail

ZoomRegionCommand

public ZoomRegionCommand(FigBasicEditor editor,
                         FigCanvas objectCanvas)

Method Detail

execute

public void execute()

zoom into the region specified by this command. We won't register the zoom command with the UndoStack.

Overrides:

execute in class Command

undo

public void undo()

no use trying to undo a zoom command. Just ignore it.

Overrides:

undo in class Command

mousePressed

public void mousePressed(FigCanvasEvent ME)

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

toString

public java.lang.String toString()

toString(): identify this ZoomRegionCommand

Overrides:

toString 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