Viewer增加setMinZoom和setMaxZoom方法

fanzia · Sep 26, 2016 · cab97f1 · cab97f1
1 parent fda32b6
commit cab97f1
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Showing 2 changed files with 41 additions and 1 deletion.
diff --git a/example/all/map/map_view_zoom.html b/example/all/map/map_view_zoom.html
@@ -142,11 +142,25 @@
 
 		alert("当前地图的级别是:" + level);
 	}
+
+	function setMaxZoom(){
+		var viewer = mapObj.getViewer();
+
+		viewer.setMaxZoom(10);
+	}
+
+	function setMinZoom(){
+		var viewer = mapObj.getViewer();
+
+		viewer.setMinZoom(3);
+	}
 </script>
 <title>Map5 -- 初始化地图</title>
 <body onload="init()">
 	<button onclick="getZoom()">显示级别</button>
 	<button onclick="setZoom()">设置级别</button>
+	<button onclick="setMaxZoom()">设置最大显示级别</button>
+	<button onclick="setMinZoom()">设置最小显示级别</button>
 	<div id="mapDiv" style="height:800px;width:100%;position:absolute;">
 	</div>
 </body>

diff --git a/src/GeoBeans/Viewer.js b/src/GeoBeans/Viewer.js
@@ -15,7 +15,8 @@ GeoBeans.Viewer = GeoBeans.Class({
 	_rotation : 0.0,
 	_resolution : 1.0,
 
-	_transformation : null,
+	_minZoom : null,
+	_maxZoom : null,
 
 
 	initialize : function(map, options){
@@ -526,6 +527,10 @@ GeoBeans.Viewer.prototype.update = function(){
  * @return {int} 最大显示级别
  */
 GeoBeans.Viewer.prototype.getMaxZoom = function(){
+
+	if(this._maxZoom != null){
+		return this._maxZoom;
+	}
 	var map = this._map;
 
 	var layers = map.layers;
@@ -552,6 +557,9 @@ GeoBeans.Viewer.prototype.getMaxZoom = function(){
  * @return {int} 最小显示级别
  */
 GeoBeans.Viewer.prototype.getMinZoom = function(){
+	if(this._minZoom != null){
+		return this._minZoom;
+	}
 	var map = this._map;
 
 	var layers = map.layers;
@@ -572,3 +580,21 @@ GeoBeans.Viewer.prototype.getMinZoom = function(){
 	}
 	return minZoom;
 };
+
+/**
+ * 设置最大的显示级别
+ * @public
+ * @param {int} zoom 最大显示级别
+ */
+GeoBeans.Viewer.prototype.setMaxZoom = function(zoom){
+	this._maxZoom = zoom;
+};
+
+/**
+ * 设置最小的显示级别
+ * @public
+ * @param {int} zoom 最小的显示级别
+ */
+GeoBeans.Viewer.prototype.setMinZoom = function(zoom){
+	this._minZoom = zoom;
+}