Add/remove/clear items

2021-12-30 18:19:00 +01:00 · 2021-12-30 18:19:00 +01:00 · 656e157f14
parent 078eb30b21
commit 656e157f14
11 changed files with 272 additions and 7 deletions
--- a/app.css
+++ b/app.css
@ -0,0 +1,62 @@
+html {
+    font-family: 'Courier New', Courier, monospace;
+}
+
+canvas {
+    margin: 0;
+    position: absolute;
+    width: 500px;
+    height: 500px;
+    top: 50%;
+    left: 50%;
+    margin-right: -50%;
+    transform: translate(-50%, -50%);
+}
+
+input {
+    height: 1.5rem;
+    width: 15rem;
+}
+
+ul {
+    list-style-type: none;
+    padding: 0;
+    text-align: center;
+}
+
+li {
+    padding: 0.75rem;
+}
+
+.openCloseMenu {
+    width: 1rem;
+    height: 1rem;
+}
+
+.item-delete {
+    width: 1rem;
+    height: 1rem;
+    float: right;
+}
+
+#menu {
+    height: 100vh;
+    width: 20rem;
+}
+
+#newItemButton {
+    height: 2rem;
+    width: 10rem;
+    margin-top: 0.5rem;
+}
+
+#menu-item {
+    text-align: center;
+}
+
+#counter {
+    font-size: 24px;
+    text-align: center;
+}
+
+
--- a/index.html
+++ b/index.html
@ -5,8 +5,21 @@
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Roulette wheel</title>
+    <script type="module" src="dist/bundle.js"></script>
+    <link rel="stylesheet" href="app.css">
 </head>
 <body>
-    Test!
+    <div id="menu">
+        <img src="static/right-arrow.png" alt="open-close-arrow" class="openCloseMenu">
+        <p id="counter">0/16</p>
+        <div id="newItem">
+            <label for="newItem">Item name</label>
+            <input name="newItem" minlength="1" maxlength="32">
+            <button id="newItemButton">Add</button>
+            <button id="removeAllItemsButton">Remove all</button>
+        </div>
+    </div>
+    <canvas></canvas>
+    <footer><div>Icons made by <a href="https://www.flaticon.com/authors/roundicons" title="Roundicons">Roundicons</a> from <a href="https://www.flaticon.com/" title="Flaticon">www.flaticon.com</a></div></footer>
 </body>
 </html>
--- a/src/app.ts
+++ b/src/app.ts
@ -0,0 +1,99 @@
+import { ItemEl } from "./components/menu-item";
+import { ItemElList } from "./components/menu-item-list";
+
+const canvas = document.querySelector("canvas")! as HTMLCanvasElement;
+const ctx = canvas.getContext("2d")!;
+const centreX = canvas.width / 2;
+const centreY = canvas.height / 2;
+
+ctx.beginPath();
+ctx.moveTo(centreX, centreY);
+ctx.stroke();
+
+console.log("Works!");
+
+const maxItems = 16;
+const items: ItemElList = new ItemElList();
+
+const menuEl = document.getElementById("menu")! as HTMLDivElement;
+const counterEl = document.getElementById("counter")!;
+const itemNameInput = document.querySelector("input")! as HTMLInputElement;
+const newItemButtonEl = document.getElementById(
+  "newItemButton"
+)! as HTMLButtonElement;
+const removeAllItemsButtonEl = document.getElementById(
+  "removeAllItemsButton"
+)! as HTMLButtonElement;
+
+menuEl.appendChild(items.el);
+
+const avaliableRGBs = ["255, 0, 0", "0, 255, 0", "0, 0, 255"];
+const bgOpacity = 0.5;
+let nextColor = avaliableRGBs[0];
+
+let counter = 0;
+
+const idsPool: number[] = [];
+initalizeIdsPool();
+
+function addNewItem() {
+  if (itemNameInput.value.length > 0 && itemNameInput.value.length <= 32) {
+    if (counter < maxItems && idsPool.length > 0) {
+      const item = new ItemEl(
+        idsPool.pop()!,
+        itemNameInput.value,
+        `rgba(${nextColor}, ${bgOpacity})`
+      );
+
+      item.deleteItem.el.addEventListener("click", () => {
+        const itemElId = calculateItemElId(item);
+        idsPool.push(itemElId);
+        setNextColor();
+        items.removeItem(item);
+        counter--;
+        updateCounter();
+      });
+
+      items.addItem(item);
+      counter++;
+      updateCounter();
+      setNextColor();
+    } else {
+      alert("Maximum number of items!");
+    }
+  }
+}
+
+function removeAllItems() {
+  if (items.itemsLength > 0) {
+    items.clear();
+    counter = 0;
+    initalizeIdsPool();
+    nextColor = avaliableRGBs[0];
+    updateCounter();
+  } else {
+    alert("Nothing to clear!");
+  }
+}
+
+function updateCounter() {
+  counterEl.textContent = `${counter}/${maxItems}`;
+}
+
+function setNextColor() {
+  nextColor = avaliableRGBs[counter % avaliableRGBs.length];
+}
+
+function calculateItemElId(item: ItemEl) {
+  return +item.el.id.slice(0, item.el.id.indexOf("-"));
+}
+
+function initalizeIdsPool() {
+  idsPool.length = 0;
+  for (let i = 0; i < maxItems; i++) {
+    idsPool.push(i);
+  }
+}
+
+newItemButtonEl.addEventListener("click", addNewItem);
+removeAllItemsButtonEl.addEventListener("click", removeAllItems);
--- a/src/components/base-component.ts
+++ b/src/components/base-component.ts
@ -0,0 +1,15 @@
+export abstract class Component<T extends HTMLElement> {
+    el: T;
+
+    constructor(el: T){
+        this.el = el;
+    }
+
+    removeChildren() {
+        if(this.el.childNodes.length > 0){
+            while(this.el.firstChild){
+                this.el.removeChild(this.el.firstChild);
+            }
+        }
+    }
+}
--- a/src/components/menu-delete-item.ts
+++ b/src/components/menu-delete-item.ts
@ -0,0 +1,17 @@
+import { Component } from "./base-component";
+
+export class DeleteItemEl extends Component<HTMLImageElement>{
+
+    constructor(id: number){
+        const el = document.createElement('img');
+        el.src = 'static/close.png';
+        el.alt = 'delete';
+        el.className = 'item-delete'
+        el.id = `${id}-delete`;
+        super(el);
+    }
+
+    configure(){
+        // TODO: make icon rotation after mouse over event
+    }
+}
--- a/src/components/menu-item-list.ts
+++ b/src/components/menu-item-list.ts
@ -0,0 +1,40 @@
+import { Component } from "./base-component";
+import { ItemEl } from "./menu-item";
+
+export class ItemElList extends Component<HTMLUListElement> {
+    private items: ItemEl[];
+
+    constructor(){
+        const UList = document.createElement('ul');
+        UList.className = 'item-list';
+        super(UList);
+        this.items = [];
+    }
+
+    get itemsLength() {
+        return this.items.length;
+    }
+    
+    addItem(item: ItemEl){
+        this.items.push(item);
+        this.el.appendChild(item.el);
+    }
+
+    clear(){
+        this.removeChildren();
+        this.items = [];
+    }
+
+    removeItem(item: ItemEl){
+        item.el.remove();
+        const indexToRemove = this.items.indexOf(item);
+        this.items.splice(indexToRemove, 1);
+    }
+
+    findLastItem(){
+        if(this.items.length > 0){
+            return this.items[this.items.length - 1];
+        }
+        return null;
+    }
+}
--- a/src/components/menu-item.ts
+++ b/src/components/menu-item.ts
@ -0,0 +1,19 @@
+import { Component } from "./base-component";
+import { DeleteItemEl } from "./menu-delete-item";
+
+export class ItemEl extends Component<HTMLLIElement> {
+
+    deleteItem: DeleteItemEl;
+
+    constructor(id: number, value: string, color: string){
+        const deleteItem = new DeleteItemEl(id);
+        const el = document.createElement('li');
+        el.className = 'menu-item';
+        el.id = `${id}-item`;
+        el.textContent = value;
+        el.style.backgroundColor = color;
+        el.appendChild(deleteItem.el);
+        super(el);
+        this.deleteItem = deleteItem;
+    }
+}
--- a/static/close.png
+++ b/static/close.png
--- a/static/right-arrow.png
+++ b/static/right-arrow.png
--- a/webpack.config.js
+++ b/webpack.config.js
@ -1,18 +1,18 @@
 const path = require('path');

 module.exports = {
-    mode: "development",
+    mode: 'development',
    entry: './src/app.ts',
    output: {
-        path:path.resolve(__dirname, "dist"),
-        filename: "bundle.js",
-        publicPath: 'dist'
+        path:path.resolve(__dirname, 'dist'),
+        filename: 'bundle.js',
+        publicPath: '/dist/'
    },
    devtool: 'inline-source-map',
    module: {
        rules: [
            {
-                test: /\.ts?$/,
+                test: /\.ts$/,
                use: 'ts-loader',
                exclude: /node_modules/
            }
--- a/webpack.config.prod.js
+++ b/webpack.config.prod.js
@ -11,7 +11,7 @@ module.exports = {
    module: {
        rules: [
            {
-                test: /\.ts?$/,
+                test: /\.tsx?$/,
                use: 'ts-loader',
                exclude: /node_modules/
            }