PROSAGA码农传奇-时空索引-无法使用arcgis为移动/缩放/旋转添加正确的撤消/重做操作

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  <P>
    显然，编辑开始时的oldGraphicMove变量被编辑结束的evt.graphic覆盖。这是通过在编辑图形之前创建具有图形规范的新图形而不是将图形直接分配给变量来解决的：
  </p>
   <pre>
    <code>
      //Obtaining the graphic before it is scaled
moveToolbar.on("scale-first-move", function (evt) {
     oldGraphicScale = new esri.Graphic(evt.graphic.geometry,evt.graphic.symbol,evt.graphic.attributes);
                                                    });

//Updating the graphic on scale end
moveToolbar.on("scale-stop", function (evt) {

newGraphicScale = new esri.Graphic(evt.graphic.geometry, evt.graphic.symbol, evt.graphic.attributes);

//Creating the operation to add to the undomanager
   var operation = new Update({
         featureLayer: evt.graphic._graphicsLayer, //The layer that will contain the modified graphic  
         preUpdatedGraphics: [oldGraphicScale], //The graphic before the changes are created
         postUpdatedGraphics: [newGraphicScale] //The graphic after the changes are made
                                                        });

//Adding the undo/redo operation
undoManager.add(operation);

//Updating the graphic
evt.graphic._graphicsLayer.applyEdits(null, [evt.graphic], null);
                                                    });

</code>
  </pre>
  <P>
    撤消/重做移动仍然存在一些问题，但此方法适用于撤消/重做缩放和旋转。
  </p>
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