Randomize operands and operation when pressing "r"

Daghall · Nov 11, 2018 · ddbe713 · ddbe713
1 parent ab1049f
commit ddbe713
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diff --git a/README.md b/README.md
@@ -17,6 +17,7 @@ Demo: https://daghall.github.io/arithmetic/
 | `*`     | Set *operation* to `×`|
 | `/`     | Set *operation* to `÷`|
 | `:`     | Toggle visualization mode|
+| `r`     | Randomize operands and operation|
 
 `0-9` followed by `+`, `−`, `×` or `÷` automatically switches active operand,
 and switches back if followed by `0-9` again.
diff --git a/arithmetic.js b/arithmetic.js
@@ -88,6 +88,14 @@ export default class Arithmetic {
     this.visualize = !this.visualize;
     this.draw();
   }
+
+  randomize() {
+    this.operands.left = randomInt(1, 9);
+    this.operands.right = randomInt(1, 9);
+    this.operation = this.operations[randomInt(3)];
+
+    this.draw();
+  }
 }
 
 function randomInt(from, to) {

diff --git a/controls.js b/controls.js
@@ -105,6 +105,9 @@ export default function Controls(arithmetic, canvas, properties) {
         case "b":
           registerKey("b");
           break;
+        case "r":
+          arithmetic.randomize();
+          break;
         case ":":
           arithmetic.toggleVisualization();
           break;