修改标绘demo，解决控制台报错

Author: hhyu1

examples/leaflet/plot_movingTarget.html

@@ -26,7 +26,7 @@
 });
 
 new L.supermap.TiledMapLayer(url).addTo(map);
-//L.supermap.plotting.editControl().addTo(map);
+L.supermap.plotting.editControl().addTo(map);
 var movingTargetLayer = L.supermap.plotting.movingTargetLayer("Moving-Target", serverUrl).addTo(map);
 
 map.on("zoomstart", function(){

examples/leaflet/plot_operatePlottingLayer.html

@@ -63,7 +63,7 @@ <h5 class='panel-title text-center' data-i18n="resources.title_operatePlottingLa
  zoom: 3
  });
 
- L.supermap.tiledMapLayer(url).addTo(map);
+ var baseLayer = L.supermap.tiledMapLayer(url).addTo(map);
  drawControl = L.supermap.plotting.drawControl();
  drawControl.addTo(map);
  var editControl = L.supermap.plotting.editControl();
@@ -130,22 +130,40 @@ <h5 class='panel-title text-center' data-i18n="resources.title_operatePlottingLa
  }
 
  function setPlottingLayerMinScale() {
- plotMapManager.getActivePlottingLayer().setMinVisibleScale(map._layers[27].getScale());
+ widgets.alert.clearAlert();
+ if (plotMapManager.getActivePlottingLayer() != null) {
+ plotMapManager.getActivePlottingLayer().setMinVisibleScale(baseLayer.getScale());
+ } else {
+ widgets.alert.showAlert("当前地图无标绘图层",false);
+ }
+ //plotMapManager.getActivePlottingLayer().setMinVisibleScale(baseLayer.getScale());
  }
 
  function setPlottingLayerMaxScale() {
- plotMapManager.getActivePlottingLayer().setMaxVisibleScale(map._layers[27].getScale());
+ widgets.alert.clearAlert();
+ if (plotMapManager.getActivePlottingLayer() != null) {
+ plotMapManager.getActivePlottingLayer().setMaxVisibleScale(baseLayer.getScale());
+ } else {
+ widgets.alert.showAlert("当前地图无标绘图层",false);
+ }
+ //plotMapManager.getActivePlottingLayer().setMaxVisibleScale(baseLayer.getScale());
  }
 
  function clearScale() {
- plotMapManager.getActivePlottingLayer().clearVisibleScale();
+ widgets.alert.clearAlert();
+ if (plotMapManager.getActivePlottingLayer() != null) {
+ plotMapManager.getActivePlottingLayer().clearVisibleScale();
+ } else {
+ widgets.alert.showAlert("当前地图无标绘图层",false);
+ }
+ //plotMapManager.getActivePlottingLayer().clearVisibleScale();
  }
 
  function setSymScaleDefinition() {
  if(document.getElementById("plotSize").selectedIndex === 0) {
- plotMapManager.getActivePlottingLayer().setSymScaleDefinition(map._layers[27].getScale(),false);
+ plotMapManager.getActivePlottingLayer().setSymScaleDefinition(baseLayer.getScale(),false);
  }else{
- plotMapManager.getActivePlottingLayer().setSymScaleDefinition(map._layers[27].getScale(),true);
+ plotMapManager.getActivePlottingLayer().setSymScaleDefinition(baseLayer.getScale(),true);
  }
  }