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java.lang.Object jfig.commands.Command jfig.commands.UpdateCommand
update jfig object attributes.
UpdateCommand allows the user to update object attributes, e.g. object color, line style, or text font size. The command object provides the xfig-style editor mode, where the new attributes are taken from the global editor attributes together wht the global update-masks. Therefore, the user can easily control which object attributes to update, and which not. Use the update-mask button to enable/disable/invert the update masks.
Use the middle mouse button to "pick up" the attributes from an object; the object's attributes are then made the current editor global attributes and can be used to update other objects.
To allow for Undo/Redo, copies of both the old and the new object attributes are stored inside the UpdateCommand, with the corresponding memory overhead.
Field Summary | |
protected int |
n_points
|
protected FigAttribs |
newAttribs
|
protected FigObject |
object
|
protected java.awt.Point |
P1
|
protected FigAttribs |
savedAttribs
|
Fields inherited from class jfig.commands.Command |
editor, objectCanvas, ready |
Constructor Summary | |
UpdateCommand(FigBasicEditor editor,
FigCanvas objectCanvas)
|
Method Summary | |
void |
cancel()
cancel the current editor command |
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 whose attributes are (to be) updated. |
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 |
isReady, message, notifyEditor, statusMessage |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
protected FigObject object
protected FigAttribs savedAttribs
protected FigAttribs newAttribs
protected java.awt.Point P1
protected int n_points
Constructor Detail |
public UpdateCommand(FigBasicEditor editor, FigCanvas objectCanvas)
Method Detail |
public FigObject[] getModifiedObjects()
getModifiedObjects
in class Command
public void execute()
Command
This method is empty for class Command.
execute
in class Command
public void undo()
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.
undo
in class Command
public void cancel()
Command
cancel and cleanup the current command. Note that this method is empty for class Command, but might be implemented by subclasses.
cancel
in class Command
public void mousePressed(FigCanvasEvent evt)
Command
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.
mousePressed
in class Command
public java.lang.String getDescription()
Command
return a one-line desription of this command, e.g. to label the undo/redo buttons, if any
getDescription
in class Command
public java.lang.String toString()
Command
toString
in class Command
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