From 3a3d0fc3d4733f8908e23a03f860d76340479ec4 Mon Sep 17 00:00:00 2001
From: Dennis Kobert <d-kobert@web.de>
Date: Tue, 11 Jun 2019 23:53:30 +0200
Subject: Reorganize Project structure

---
 .../src/js/modules/ui/components/backdrop.js       | 65 ++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 WebInterface/src/js/modules/ui/components/backdrop.js

(limited to 'WebInterface/src/js/modules/ui/components/backdrop.js')

diff --git a/WebInterface/src/js/modules/ui/components/backdrop.js b/WebInterface/src/js/modules/ui/components/backdrop.js
new file mode 100644
index 0000000..82ca64f
--- /dev/null
+++ b/WebInterface/src/js/modules/ui/components/backdrop.js
@@ -0,0 +1,65 @@
+/**
+ * Class for adding functionality to backdrop elements
+ */
+export default class Backdrop {
+  /**
+   * Registers all important elements in the backdrop
+   * @param {string} backdropMenu ID of Backdrop Menu
+   * @param {string} frontLayer ID of Front Layer
+   * @param {string} menuButton ID of Show / Hide Menu Button
+   */
+  constructor(backdropMenu, frontLayer, menuButton) {
+    this.ids = {backdropMenu, frontLayer, menuButton};
+  }
+
+  /**
+   * Initializes the components from the ids defined in the constructor
+   */
+  initialize() {
+    this.open = false;
+    this.backdrop = document.getElementById(this.ids.backdropMenu);
+    this.frontLayer = document.getElementById(this.ids.frontLayer);
+    this.menuButton = document.getElementById(this.ids.menuButton);
+
+    this.registerEvents();
+  }
+
+  /**
+   * Registers all neccessary events
+   */
+  registerEvents() {
+    this.registerButtonEvent();
+    this.registerFrontLayerEvent();
+  }
+
+  /**
+   * Registers showing / hiding through menu button
+   */
+  registerButtonEvent() {
+    this.menuButton.addEventListener('click', () => {
+      // Change open state
+      this.open = !this.open;
+
+      // Hide / Unhide Backdrop Menu
+      this.open ? this.backdrop.classList.remove('hidden') :
+          this.backdrop.classList.add('hidden');
+
+      // Set open state for menu button
+      this.open ? this.menuButton.classList.add('open') :
+          this.menuButton.classList.remove('open');
+    });
+  }
+
+  /**
+   * Registers hiding upon front layer interaction
+   */
+  registerFrontLayerEvent() {
+    this.frontLayer.addEventListener('click', () => {
+      if (!this.open) return; // It's already closed
+
+      this.open = false;
+      this.backdrop.classList.add('hidden');
+      this.menuButton.classList.remove('open');
+    });
+  }
+}
-- 
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