Editing Graphic Geometry

In this post, I'm demonstrating how to move a vertex of a polygon to modify its geometry. The application displays a graphic with a simple fill symbol. When the user clicks the Start Edit button, the symbol of the graphic is assigned to a new custom symbol instance, where the outline of the polygon is rendered as a line and the vertexes as little squares. While holding the mouse down over a square, a user can move the vertex to a new location on the map. The user can repeat this process over other vertexes until the Stop Edit button is clicked. You can see the application in action here. And like usual, the source is available from here.