swapp0

Undomanager did not remove graphics when undo()

Discussion created by swapp0 on Jul 15, 2013
My attempted on using the UndoManager has been unsuccessful for a couple days and I'm stuck.

I did not setup a proxy.

I create a FeatureLayer object in memory with
 var drawingPointLayer = new esri.layers.FeatureLayer(featureCollection, {
  id: "drawPointLayer",
  mode: esri.layers.FeatureLayer.MODE_ONDEMAND
 });
 mapApp.map.addLayer(drawingPointLayer);



created UndoManager and button to perfom undo redo actions
 undoManager = new esri.UndoManager({maxOperations:50});

 var undoButton = new dijit.form.ToggleButton({
  id: "undoButton",
  showLabel: false,
  iconClass: "dijitEditorIcon dijitEditorIconUndo",
  onClick: function(){ 
   undoManager.undo(); 
   checkUndoRedoState(); 
   
   mapApp.map.graphics.graphics.splice(mapApp.map.graphics.graphics.length-1, 1);
   mapApp.map.graphics.redraw();
   alert(undoManager.length + " | " + mapApp.map.graphics.graphics.length);
  }
 }, "undoButton");
 var redoButton = new dijit.form.Button({
  id: "redoButton",
  showLabel: false,
  iconClass: "dijitEditorIcon dijitEditorIconRedo",
  onClick: function(){ 
   undoManager.redo(); 
   checkUndoRedoState(); 
  }
 }, "redoButton");


and add operation to UndoManager
function addToUndoManager(graphic, task){
 var operation;
 var featureLayer = mapApp.map.getLayer("drawPointLayer");
 //var featureLayer = mapApp.map.getLayer("landuseLayer");

 if(task=="add"){
  featureLayer.applyEdits([graphic], null, null, function() {
            operation = new esri.dijit.editing.Add({
    featureLayer: featureLayer,
    addedGraphic: graphic
   });
  });

 }

 if(operation)
  undoManager.add(operation);
  
 checkUndoRedoState();
 
 alert(undoManager.canUndo + " | " + undoManager.canRedo + " | " + operation.label + " | " + operation.type + " | " + undoManager.length + " | " + mapApp.map.graphics.graphics.length);
}


New point markers would be added to the map via mouse click. Undomananger would register. But when I press the undo button, the graphics on the map would not disappear.

I'm clueless on what to do next to solve this problem.

Please Help

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