Freehand polygon drawing with SketchViewModel - change the default active drawing segment rendering?

JonathanTiu

When using the SketchViewModel and drawing a freehand polygon in Esri 4.x, i see it renders all these little circles (vertices?) of the active drawing segment being drawn. It looks very busy and quite jarring.

 

 

In our Esri 3.x application, when we are drawing, we are able to just render a plain line as we draw the freehand polygon which is very nice.

 

Is there any way to customize .  Those little circles for each vertex are quite annoying and are completely different from what we were able to render with our 3.x application.  we are trying to migrate to 4.x and maintain the same UI feedback as a requirement.

 

JoelBennett

The SketchViewModel has an undocumented property called "vertexSymbol" which, by default, it is set to a circular SimpleMarkerSymbol with a white background and a dark grey border.  I would recommend setting the opacity of the symbol in order to show and hide it as desired:

function hideVertexSymbol(sketchViewModel) {
	sketchViewModel.set("vertexSymbol.outline.color.a", 0);
	sketchViewModel.set("vertexSymbol.color.a", 0);
}

function showVertexSymbol(sketchViewModel) {
	sketchViewModel.set("vertexSymbol.outline.color.a", 1);
	sketchViewModel.set("vertexSymbol.color.a", 1);
}