Latest Contributions by Arne_Gelfert

I believe what I have been trying to do here can't be done. It's the way arcgis-map-ipywidget-view.js works and that interacts with my synchronous Python. Here is the JS code. center_long_lat_changed: function(){ ///When the center is passed in as a [long,lat] list, add it to the view ///Then watch the view until it changes center into the correct format, ///which we will then update correctly via the _center model attribute esriLoader.loadModules(["esri/core/watchUtils"], options).then(([watchUtils]) => { var _center_long_lat = this.model.get("_center_long_lat"); if(_center_long_lat.length === 2){ console.log("Converting [long, lat] center to standard center..."); //Set up the callback when the view's center is ready for consuption watchUtils.once(this.activeView, "center", () => { console.log("Center is converted"); var view_center = JSON.parse(JSON.stringify(this.activeView.center)); this.model.set("_center", view_center); this.model.set("_center_long_lat", []); this.model.save_changes(); }) //Actually update the center on the activeView to trigger the above this.activeView.center = _center_long_lat } }).catch((err) =>{ this._displayErrorBox("Error while modifying center_long_lat."); console.warn("Error on center_long_lat"); console.warn(err); }); Throw in some break points and look at how lat/lat and X/Y change for  this.activeView.center  and appears to all be there. My Python code just doesn't wait for things to update. If anyone has a suggestion for a work-around, holler. In the meantime, I'm moving on. ... View more

Ok, I get what you're saying. But I think it doesn't help me along. Sadly, I think this is just another ESRI half baked feature that's either not intuitive at all or buggy. If I do this as in previous example :   myMap = mygis.map(location=location_coords, zoomlevel=zoomlevel) myMap   I get a map showing in my notebook. I actually don't need to see the map but I found that certain things don't work unless you actually call the map. So I show it. Now, a simplified version of what I tried previously looked like this: for loc in [[40,80],[45,85],[50,90]]: myMap.center = loc print(myMap.center) time.sleep(2) # so I can watch in amazement Here, the map advanced to the new extent, centered around 'loc'. But when calling the center property (and I believe this is a property not a method), I find that it never changes. When, however, I try this: loc = [42,-85] myMap.center = loc print(myMap.center) >>>{'spatialReference': {'latestWkid': 3857, 'wkid': 102100}, 'x': -9684795.6990148, 'y': 5465442.183322752} === THEN IN NEW JUPYTER CELL === loc = [42,-85] myMap.center = loc print(myMap.center) >>>{'spatialReference': {'latestWkid': 3857, 'wkid': 102100}, 'x': -9128198.245048434, 'y': 5012341.663847516} === THEN IN NEW JUPYTER CELL === loc = [44,-87] myMap.center = loc print(myMap.center) >>>{'spatialReference': {'latestWkid': 3857, 'wkid': 102100}, 'x': -9462156.717428254, 'y': 5160979.444049782} It works the way I would expect it. The map is updated and shows the new extent (based on center and zoom level) and the map.center property is updated. So I suspect it must somehow have to do with how the map images that's first rendered with gis.map() is referenced from code in the same or other cells and then updated. This may be more of a Jupyter internal thing than the Python API. Who knows. Could be by design but is strikes me as more of a bug than a feature! As always, Dan, thanks for taking the time to take a look. Haven't spent as much time in the ESRI Python world as I'd like to over the last 12 months, so feedback from the Jedi Masters is always appreciated! ... View more

Thanks for stepping away from retirement for a moment, Dan. But I don't know what you mean. The line: myMap.center = new_location_coords appears to re-center the map around new coordinates, i.e. the map updates. But why do these new coordinates not stick for "center"? It's like the setter refreshes the map but does not set the property correctly. ... View more

The only way to overcome this behavior was by adding an event handler for zooming that creates a new graphic from the existing one, clear the layer and then adds the new graphic. It works but hey, it's workaround for unexplainable behavior. ... View more

Nifty little trick! Very useful. ... View more

Just came across this myself... never seen it before. Adding a single polyline graphic to a graphics layer and than zooming in and out creates a cascading series of smaller and/or larger siblings of that graphic. Not sure how else to describe this. I've tried all above suggested fixes. No luck yet. if anyone else has seen this in the last 4 year since the original post, please holler. Using JSAPI 3.31, AGS10.9, WAB2.21. ... View more

Agree with you that this likely goes beyond affecting my work with layout templates. Like the suggestion to post more widely. Will do that and also am enlisting ESRI Support on this. Thanks for taking the time to read my cry for help. Haha, Always appreciated.   ... View more

yeah, and if I just went with a different product rather than Pro ... maybe I would never have any of these headaches - haha! ... View more