Update README.md

README.md

@@ -4,6 +4,48 @@
 
 [View on Github Pages](https://tone4hook.github.io/poly-form-canvas/)
 
++ This JSON Form Schema defines a property `corners` which is an array of exactly 4 items.
++ Each item is an object with two required properties `x` and `y`, both of which are numbers.
+
+```
+{
+ "properties": {
+ "corners": {
+ "type": "array",
+ "minItems": 4,
+ "maxItems": 4,
+ "items": {
+ "type": "object",
+ "properties": {
+ "x": { "type": "number" },
+ "y": { "type": "number" }
+ },
+ "required": ["x", "y"]
+ }
+ }
+ }
+}
+```
+
++ This UI Schema defines a vertical layout with one control element.
++ The control is bound to the `corners` property of the form data (`#/properties/corners`).
++ The `showSortButtons` option is set to `false`, which means that the sort buttons will not be displayed for this control.
+
+```
+{
+ "type": "VerticalLayout",
+ "elements": [
+ {
+ "type": "Control",
+ "scope": "#/properties/corners",
+ "options": {
+ "showSortButtons": false
+ }
+ }
+ ]
+}
+```
+
 ### Get Started
 
 - `git clone`