Adding callout text to selected feature with an incremental value?

Question

Hi all, My ultimate goal to add callout text to my selected features with an incremental value like "sale 1", "sale 2"," sale 3" ect... What I have right now is to set up label to display label in callout text and use this snippet to turn the label on for selected features. My issue is my label doesn't come from attribute table and each label is different from the others. How do I modify this code to make it work or if this approach doesn't work in my case, what else could I use to accomplish it? Thank you very much. //Layer to label. US Cities lyr was used var lyrOfInterest = MapView.Active.Map.GetLayersAsFlattenedList().OfType<FeatureLayer>().FirstOrDefault(); QueuedTask.Run(() => { var selection = MapView.Active.Map.GetSelection(); //Get the OIDs of the selected features //We will use this to label those features only var selectedOIDs = selection[lyrOfInterest]; //Get the layer's definition var lyrDefn = lyrOfInterest.GetDefinition() as CIMFeatureLayer; if (lyrDefn == null) return; //Get the label classes - we need the first one //Or you could create a new label class var listLabelClasses = lyrDefn.LabelClasses.ToList(); var theLabelClass = listLabelClasses.FirstOrDefault(); //set the label class Expression to use the Arcade expression theLabelClass.Expression = "$feature.CITY_NAME"; //label using city name //Where clause is set to the OIDs of the selected features theLabelClass.WhereClause = $"OBJECTID IN ({string.Join(",", selectedOIDs)})"; //theLabelClass.TextSymbol = Set to any text symbol you want //Set the label definition back to the layer. lyrOfInterest.SetDefinition(lyrDefn); lyrOfInterest.SetLabelVisibility(true); }); ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

helenchu · Answer

In ArcObjects I placed text element at centroid of selected features. If I want to do the same thing in Pro SDK what snippets should I look for ? Is it the overlay? Can I do this in layout view ? My users asked me to keep the old way so they can move the callouts around to their taste . Thank you.Public Sub AddCompCallout_mapview(pFeature As IFeature, strCompLabel As String, strCompNum As String) 'add callout text Dim pTextElement As ITextElement pTextElement = New TextElement Dim pElement As IElement pElement = pTextElement pTextElement.Text = strCompLabel + " " + strCompNum Dim pArea As IArea Dim pPointCentroid As IPoint = New Point Dim pPointAnchor As IPoint = New Point Dim pEnv As New Envelope pEnv = pActiveview.Extent pEnv.XMax = pFeature.Shape.Envelope.XMax pEnv.XMin = pFeature.Shape.Envelope.XMin pEnv.YMax = pFeature.Shape.Envelope.YMax pEnv.YMin = pFeature.Shape.Envelope.YMin pArea = pFeature.Shape pPointCentroid.PutCoords(pEnv.LowerRight.X, pEnv.UpperRight.Y) pPointAnchor = pArea.Centroid pElement.Geometry = pPointCentroid 'font Dim pFontDisp As stdole.IFontDisp pFontDisp = New stdole.StdFont pFontDisp.Name = "Arial" pFontDisp.Bold = True pFontDisp.Size = 14 'color Dim pColor As ESRI.ArcGIS.Display.IRgbColor = New RgbColor pColor.Blue = 255 pColor.Green = 0 pColor.Red = 0 Dim pTextSymbol As IFormattedTextSymbol pTextSymbol = New TextSymbol Dim pCallout As ICallout pCallout = New BalloonCallout pTextSymbol.Background = pCallout pTextSymbol.Color = pColor pTextSymbol.Font = pFontDisp pCallout.AnchorPoint = pPointAnchor Dim pMargin As ITextMargins pMargin = pCallout With pMargin .LeftMargin = 1 .RightMargin = 1 .BottomMargin = 1 .TopMargin = 1 End With pTextElement.Symbol = pTextSymbol Dim pGraphicsContainer As IGraphicsContainer pGraphicsContainer = pMxDoc.ActiveView 'pGraphicsContainer.DeleteAllElements() pGraphicsContainer.AddElement(pElement, 0) pElement.Activate(pMxDoc.ActiveView.ScreenDisplay) pMxDoc.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, Nothing, Nothing) End Sub‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

UmaHarano · Answer

Hi Helen,

To label features in Pro with values that are dynamic, we use Label expressions.  Using Arcade, Python, you can make simple calculations (that increment a number, for example) and dynamically display the labels. So for example, if you want to add the word "Sale" in your label and then append a number that increments, it might be possible to do that with an expression using the Python or Arcade – If you have a starting number that you know.

But - To label features, it is recommended to have all the information in your feature table. Static info can be appended.

Thanks

Uma

helenchu · Answer

Yes there's order.  I have a listbox that store all accounts to search for in order.   Thanks.