?? zoomaction.js
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/**
* Copyright 2006 mapeasy.sf.net.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* 地圖縮放
*
* @author Tim.Wu Michael.Young
*/
function ZoomAction(mapModel) {
BaseAction.apply(this, new Array(mapModel));
//~ Method
/**
* 構(gòu)造函數(shù)
*/
{
// 注冊 Command 對象的監(jiān)聽器
command.addListener("zoomin", this);
command.addListener("zoomout", this);
command.addListener("sliderzoom", this);
}
this.propertyChange = function(param, newValue) {
if (param == "zoomin") {
if (newValue != null && newValue == this.model.getId()) {
this.zoomin();
}
}
if (param == "zoomout") {
if (newValue != null && newValue == this.model.getId()) {
this.zoomout();
}
}
if (param == "sliderzoom") {
if (newValue != null && newValue[0] == this.model.getId()) {
this.sliderzoom(newValue[1]);
}
}
}
/**
* 地圖放大
*/
this.zoomin = function() {
var level = this.model.getZoom().getLevel();
if (level < MapModel.maxZoomLevel) {
this.model.setZoom(new Zoom(level + 1));
}
}
/**
* 地圖縮小
*/
this.zoomout = function() {
var level = this.model.getZoom().getLevel();
if (level > 1) {
this.model.setZoom(new Zoom(level - 1));
}
}
/**
* 滑塊拖動縮放
*/
this.sliderzoom = function(newLevel) {
var level = this.model.getZoom().getLevel();
if (level != newLevel) {
this.model.setZoom(new Zoom(newLevel));
}
}
}
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