root / trunk / extensions / extGeoreferencing / src / org / gvsig / georeferencing / ui / zoom / tools / BaseViewTool.java @ 18530
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2007 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*/
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package org.gvsig.georeferencing.ui.zoom.tools; |
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import java.awt.Graphics; |
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import java.util.ArrayList; |
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import org.gvsig.georeferencing.ui.zoom.CanvasZone; |
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/**
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* Clase base de la que deben extender las herramientas para la vista del
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* zoom.
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*
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* 17/01/2008
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public abstract class BaseViewTool implements ToolListener { |
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protected ArrayList listeners = new ArrayList(); |
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protected boolean active = false; |
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protected CanvasZone canvas = null; |
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private boolean sleepActive = false; |
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private boolean sleep = false; |
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/**
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* Constructor. Asigna el canvas y el listener para la tool.
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* @param canvas
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* @param listener
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*/
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public BaseViewTool(CanvasZone canvas, ToolListener listener) {
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this.canvas = canvas;
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addToolListener(listener); |
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} |
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/**
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* A?ade un listener para eventos de la tool
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* @param listener
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*/
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public void addToolListener(ToolListener listener) { |
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if(!listeners.contains(listener))
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listeners.add(listener); |
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} |
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/**
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* Informa de que la herramienta est? activa.
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* @param ev
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*/
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public void onTool(ToolEvent ev) { |
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for (int i = 0; i < listeners.size(); i++) { |
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((ToolListener)listeners.get(i)).onTool(ev); |
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} |
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} |
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/**
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* Informa de que la herramienta est? activa.
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* @param ev
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*/
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public void offTool(ToolEvent ev) { |
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for (int i = 0; i < listeners.size(); i++) { |
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((ToolListener)listeners.get(i)).offTool(ev); |
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} |
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} |
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/**
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* Evento de finalizaci?n de las acciones de la tool
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* @param ev ToolEvent
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*/
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public void endAction(ToolEvent ev) { |
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for (int i = 0; i < listeners.size(); i++) { |
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((ToolListener)listeners.get(i)).endAction(ev); |
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} |
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} |
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/**
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* Consulta si est? activo el evento de pinchado y arrastrado de los puntos de
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* control.
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* @return
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*/
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public boolean isActive() { |
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return active;
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} |
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/**
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* Asigna el flag que activa y desactiva la herramienta
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* @param active true para activarla y false para desactivarla
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*/
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public void setActive(boolean active) { |
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this.active = active;
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} |
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/**
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* Desactiva la herramienta temporalmente. Guarda el estado en el que estaba
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* para restaurarlo cuando se invoque a awake
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*/
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public void sleep() { |
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if(!sleep) {
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sleepActive = active; |
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active = false;
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sleep = true;
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} |
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} |
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/**
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* Recupera el estado de activaci?n que ten?a antes de la ?ltima invocaci?n
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* de sleep
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*/
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public void awake() { |
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if(sleep) {
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active = sleepActive; |
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sleep = false;
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} |
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} |
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/**
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* Parte gr?fica de una tool. Una tool puede dibujar sobre una vista
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* @param img BufferedImage
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* @param ext Rectangle2D
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*/
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public abstract void draw(Graphics g); |
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/**
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* Obtiene el resultado de la aplicaci?n de la herramienta
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* @return Object
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*/
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public abstract Object getResult(); |
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} |