Dynamically show/hide feature graphic in the map

Permanently deleted user

February 21, 2018 20:04

I am building a GVH Module to filter the map based on a specific criteria.  How can I write code in the TypeScript to show/hide graphic in the map.  For example, I try this code below.  The object myLayer is given and I want to query the layer for the features having the Restriced attribute = "1".  Then, hide those features in the map.  I got the features in the result but couldn't hide the graphic in the map.  Please help.

 

                var query = new esri.tasks.Query();

 

                query.where = "Restricted=1";

 

                query.returnGeometry = true;

 

                let queryTask = getQueryTask(myLayer);

 

                queryTask.execute(query, (results: esri.tasks.FeatureSet) => {

 

                    var esriFeatureSet = new esri.tasks.FeatureSet(results);

 

                    var featureSet = new FeatureSet({

 

                        esriFeatureSet: esriFeatureSet,

 

                        layer: myLayer,

 

                        app: this.app

 

                    });

 

                    for (let i = 0; i < featureSet.features.length(); i++) {

 

                        var feature = featureSet.features.getAt(i);

 

                        var graphic = MapUtils.findFeatureInMap(feature.esriFeature.get(), this.app.site);

 

                        // graphic return null

 

                        if(graphic) {

 

                             graphic.hide();

 

                        }

 

                    }

 

                }, (e: Error) => {

 

                    this.app.trace.error("Query failed: " + e.message);

 

                });

 

Thanks,

 

Tony

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  John Nerge

  February 23, 2018 18:52

  Clarifying question: is there a reason you couldn't do this with a workflow instead? Query Layer Definition works great for hiding/showing features based on attribute values.

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  Permanently deleted user

  February 23, 2018 19:45

  That is a good question.  I am new to GeoCortex Essential so I am not sure whether workflow can do the following things.

   

  1. Need to add a button into the toolbox to open a filter form.  (We don't use "I want to" menu for this one)

   

  2. Add custom HTML widgets (i.e. slider, date picker) into the form

   

  3. Build a custom layout for the form. For example, we need 2 columns for 2 textboxes in one row instead of one column with all widgets

   

  4. Implement cadecase selection dropdown lists and onClick events

   

  5. Dynamically show/hide feature in the map based on the button click events and dropdown selection change events

   

   

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  John Nerge

  February 23, 2018 21:15

  Some of that is pretty easy to set up, but some of it you can't do without custom programming.

   

  1. On the toolbar, you'll Add a button and use the command RunWorkflowById or RunWorkflowWithArguments with your workflow ID and/or arguments as the parameters.

   

  2) Would require custom programming

   

  3) Would require custom programming

   

  4) I don't know what that is

   

  5) Buttons are doable with Display Forms and the Set Layer Definition activity. I don't know about dropdown selection changes, but if it's possible it'd require custom programming.

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