Start implementing input handling

1 files changed, 40 insertions, 0 deletions

diff --git a/src/view/InputHandler.ts b/src/view/InputHandler.ts
new file mode 100644
index 0000000..e39ffe0
--- /dev/null
+++ b/src/view/InputHandler.ts
@@ -0,0 +1,40 @@
+'use strict';
+
+
+import Direction from '../model/Direction';
+
+
+class InputHandler {
+        keys: {[key: number]: boolean} = {};
+
+        listeners: (() => void)[] = [];
+
+        private callListeners() {
+                this.listeners.forEach(l => l());
+        }
+
+        constructor() {
+                window.addEventListener('keydown', (ev) => {
+                        this.keys[ev.keyCode] = true;
+                        this.callListeners();
+                });
+
+                window.addEventListener('keyup', (ev) => {
+                        delete this.keys[ev.keyCode];
+                        this.callListeners();
+                });
+        }
+
+        addListener(l: () => void) {
+                this.listeners.push(l);
+        }
+}
+
+module InputHandler {
+        export const Left = 37;
+        export const Up = 38;
+        export const Right = 39;
+        export const Down = 40;
+};
+
+export default InputHandler;