net.refractions.udig.tools.edit.behaviour
Class ExtendLineBehaviour

java.lang.Object
  net.refractions.udig.tools.edit.behaviour.ExtendLineBehaviour

All Implemented Interfaces:

EventBehaviour

public class ExtendLineBehaviour
extends java.lang.Object
implements EventBehaviour

Requirements:

• EventType==Released
• CurrentShape != null
• mouse is over end vertex
• button1 was released
• no buttons or modifiers down
• mode == MODIFYING or NONE

Action:

• mode is set to CREATING or CREATING_BACKWARD

Since:

1.1.0

Author:

jones

Constructor Summary

ExtendLineBehaviour()

Method Summary

UndoableMapCommand	getCommand(EditToolHandler handler, MapMouseEvent e, EventType eventType) The action to be performed by this EventBehaviour.
void	handleError(EditToolHandler handler, java.lang.Throwable error, UndoableMapCommand command) This method is called if an exception occurs during the execution of the run method.
boolean	isValid(EditToolHandler handler, MapMouseEvent e, EventType eventType) Called to determine whether this EventBehaviour is applicable and should be run.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtendLineBehaviour

public ExtendLineBehaviour()

Method Detail

isValid

public boolean isValid(EditToolHandler handler,
                       MapMouseEvent e,
                       EventType eventType)

Description copied from interface: EventBehaviour

Called to determine whether this EventBehaviour is applicable and should be run.

Specified by:

isValid in interface EventBehaviour

Parameters:

handler - handler that calls this Behaviour

e - mouse event that just occurred.

eventType - the type of event that just occurred

Returns:

true if this mode is applicable and should be run.

getCommand

public UndoableMapCommand getCommand(EditToolHandler handler,
                                     MapMouseEvent e,
                                     EventType eventType)

Description copied from interface: EventBehaviour

The action to be performed by this EventBehaviour. This action takes place in the event thread so it must perform VERY quickly.

Specified by:

getCommand in interface EventBehaviour

Parameters:

handler - handler that calls this Behaviour

e - Event that occurred.

eventType - The type of event that has occurred

Returns:

Command that will be executed in order to perform the behaviour

handleError

public void handleError(EditToolHandler handler,
                        java.lang.Throwable error,
                        UndoableMapCommand command)

Description copied from interface: EventBehaviour

This method is called if an exception occurs during the execution of the run method.

This method should

1. Rollback the changes made during the run method
2. Log the error in the plugin's log

Specified by:

handleError in interface EventBehaviour

Parameters:

handler - handler that calls this Behaviour

error - Error that occurred

command - Command retrieved from getCommandMethod. May be null if exception occurred while executing getCommand();