add: base files

2023-10-20 09:32:10 +02:00 · 2023-10-20 09:32:10 +02:00 · 4d70b47308
commit 4d70b47308
3 changed files with 119 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html lang="pl">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Strona z ciekawym wykorzystaniem JS</title>
+    <link rel="stylesheet" href="style.css"/>
+    <script defer src="script.js"></script>
+</head>
+
+<body>
+    <div id="menu">
+        <select id="color">
+            <option value="green">Zielony</option>
+            <option value="red">Czerwony</option>
+            <option value="yellow">Żółty</option>
+            <option value="orange">Pomarańczowy</option>
+            <option value="gray">Szary</option>
+            <option value="black">Czarny</option>
+            <option value="lime">Limonkowy</option>
+        </select>
+        <input type="range" min="5" max="40" value="5" id="weight"/>
+        <button id="clear">Wyczyść rysunek!</button>
+    </div>
+    <canvas id="canvas"></canvas>
+</body>
+
+</html>
--- a/script.js
+++ b/script.js
@ -0,0 +1,56 @@
+document.addEventListener('contextmenu', event => event.preventDefault());
+document.addEventListener('mousedown', startPainting);
+document.addEventListener('mouseup', stopPainting);
+document.addEventListener('mousemove', draw);
+window.addEventListener('resize', resize);
+
+const colorSelector = document.getElementById('color');
+const weightSlider = document.getElementById('weight');
+const clearButton = document.getElementById('clear');
+const canvas = document.getElementById('canvas');
+const ctx = canvas.getContext('2d');
+
+let color = 'green';
+let weight = 5;
+
+clearButton.addEventListener('click', () => ctx.clearRect(0, 0, canvas.width, canvas.height))
+weightSlider.addEventListener('change', e => weight = e.target.value)
+colorSelector.addEventListener('change', e => color = e.target.value)
+resize();
+
+function resize() {
+    ctx.canvas.width = window.innerWidth;
+    ctx.canvas.height = window.innerHeight;
+}
+
+let lastPos = { x: 0, y: 0 };
+let paint = false;
+
+function getPosition(event) {
+    lastPos.x = event.clientX - canvas.offsetLeft;
+    lastPos.y = event.clientY - canvas.offsetTop;
+}
+
+function startPainting(event) {
+    paint = true;
+    getPosition(event);
+}
+
+function stopPainting() {
+    paint = false;
+}
+
+function draw(event) {
+    if (!paint) return;
+
+    ctx.beginPath();
+    ctx.lineWidth = weight;
+    ctx.lineCap = 'round';
+
+    ctx.strokeStyle = color;
+    ctx.moveTo(lastPos.x, lastPos.y);
+    getPosition(event);
+
+    ctx.lineTo(lastPos.x, lastPos.y);
+    ctx.stroke();
+}
--- a/style.css
+++ b/style.css
@ -0,0 +1,34 @@
+body {
+    margin: 0;
+    overflow: hidden;
+}
+
+#canvas {
+    width: 100%;
+    height: 100%;
+}
+
+#menu {
+    background-color: #fff;
+    position: absolute;
+    margin: 10px;
+}
+
+button {
+    border: none;
+    color: #fff;
+    background-color: #2f3136;
+    padding: 5px;
+    border-radius: 5px;
+    transition: ease-in-out .2s;
+}
+
+button:hover {
+    background-color: #646466;
+}
+
+select {
+    border: 2px solid #000;
+    padding: 5px;
+    border-radius: 5px;
+}