topic Re: Sketch Widget - get geometries in ArcGIS JavaScript Maps SDK Questions

Sketch Widget - get geometries

AzariaszTrzciński — Sat, 17 Aug 2019 18:13:47 GMT

Hi everyone!

I've got a code: JS Bin - Collaborative JavaScript Debugging, I can mark something, but how can I save my work so I could use it later? I would be great to have it in JSON format. Could someone help me?

Re: Sketch Widget - get geometries

RobertScheitlin__GISP — Sun, 18 Aug 2019 19:23:01 GMT

Azariasz,

You can use the toJSON and fromJSON method of the Graphics class. https://developers.arcgis.com/javascript/latest/api-reference/esri-Graphic.html#toJSON

Re: Sketch Widget - get geometries

AzariaszTrzciński — Sat, 11 Dec 2021 06:49:02 GMT

Thank you for comment, I saw this method, but I still don't know how to get geometries?
In 3.21 version I used this code:

function addGraphic(evt) {
		//deactivate the toolbar and clear existing graphics 
		tb.deactivate(); 
		map.enableMapNavigation();
		
		// figure out which symbol to use
		var symbol = fillSymbol;
		
		map.graphics.add(new Graphic(evt.geometry, symbol));
		var obj=evt.geometry.rings;
		var poly_cords="";
		for ( var path = 0; path <obj.length; path ++ ) {
			//For each point in the path...
			for ( var pt = 0; pt < obj[path].length; pt++ ) {
				poly_cords+=obj[path][pt][0].toFixed(1)+', ';
				poly_cords+=obj[path][pt][1].toFixed(1)+' \n';
			}
			poly_cords+='---\n';
		}
		document.getElementById('cords').value += poly_cords;
	}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Now I even try:

sketch.on("draw-end", addGraphic);
function addGraphic(evt) {
	console.log("WORKS!");
}‍‍‍‍

but still nothing 😞 How can I get it?

Re: Sketch Widget - get geometries

RobertScheitlin__GISP — Sat, 11 Dec 2021 06:49:05 GMT

sketch.on('create', function(evt){
  if(evt.state === 'complete'){
    console.log(evt.graphic);
  }
});‍‍‍‍‍

Re: Sketch Widget - get geometries

AzariaszTrzciński — Sat, 11 Dec 2021 06:49:08 GMT

It helps a lot! I also played with

sketch.on("update", function(event){
	...
}‍‍‍‍‍‍

but I realised that I really don't need to know about every single change. I only want to save done work. It should be like this:

user is adding / changing / deleting shapes
then click the button "Save my work"
program gather all geometries, convert to JSON or string
add to database

How to do that? Is it possible?

Re: Sketch Widget - get geometries

RobertScheitlin__GISP — Sat, 11 Dec 2021 06:49:11 GMT

Same thing check the event state for "complete"

sketch.on("update", function(event){
  if(event.state === 'complete'){
    //do something
  }
}‍‍‍‍‍

Re: Sketch Widget - get geometries

AzariaszTrzciński — Wed, 21 Aug 2019 21:05:14 GMT

Yeah! I did it!
If someone would to copy this is all the code: JS Bin - Collaborative JavaScript Debugging