Warum ist meine Zeichenfläche innerhalb der Seite versetzt?
Es ist schwer zu erklären. Aber ich werde es versuchen, die gesamte Leinwand ist versetzt. Ich bin mir nicht sicher, wie das passiert ist oder wie ich es beheben kann. Wenn sich Ihre Maus beispielsweise in der oberen linken Ecke der Seite befindet und Sie in der Mitte beginnen, stimmt sie mit der oberen linken Ecke des Canvas-Elements selbst überein. Verwenden Sie Codeausschnitte, um zu verstehen, wovon ich spreche.
let currentColor = null;
let inputs = document.getElementsByClassName("style2");
for (const input of inputs) {
input.addEventListener("click", (e) => {
if (e.detail !== 2) e.preventDefault();
});
}
let arr = [];
for (let i = 0; i < inputs.length + 1; i++) {
arr.push(i.toString());
}
arr.shift();
for (const input of inputs) {
input.addEventListener("input", (e) => {
const { value } = document.getElementById(e.target.id);
currentColor = value;
$("#selectedColor").css("background-color", value);
})
input.addEventListener("click", (e) => {
const { value } = document.getElementById(e.target.id);
currentColor = value;
$("#selectedColor").css("background-color", value);
})
}
var rangeslider = document.getElementById("sliderRange");
const setSize = document.getElementById("setSize")
const submit = document.getElementById("submit")
submit.addEventListener("click", (e) => {
rangeslider.value = setSize.value
})
const button = document.getElementById("clear")
// create canvas element and append it to document body
var canvas = document.getElementById('canvas');
// some hotfixes... ( ≖_≖)
// get canvas 2D context and set him correct size
var ctx = canvas.getContext('2d');
resize();
// last known position
var pos = { x: 0, y: 0 };
window.addEventListener('resize', resize);
button.addEventListener('click', clear)
document.addEventListener('mousemove', draw);
document.addEventListener('mousedown', setPosition);
document.addEventListener('mousemove', setPosition);
// new position from mouse event
function setPosition(e) {
let canvas = document.getElementById("canvas")
pos.x = e.clientX
pos.y = e.clientY
}
// resize canvas
function resize() {
ctx.canvas.width = 650;
ctx.canvas.height = 375;
}
function draw(e) {
// mouse left button must be pressed
if (e.buttons !== 1) return;
let canvas = document.getElementById('canvas');
console.log(pos)
ctx.beginPath(); // begin
ctx.lineWidth = rangeslider.value;
ctx.lineCap = 'round';
ctx.strokeStyle = currentColor;
ctx.moveTo(pos.x, pos.y); // from
setPosition(e);
ctx.lineTo(pos.x, pos.y); // to
ctx.stroke(); // draw it!
}
function clear() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
}
html, body {
height: 100%;
width: 100%;
font-family: sans-serif;
background-color: #B3B7B5;
/* overflow: hidden; */
}
.style2 {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
background-color: transparent;
width: 35px;
height: 35px;
border: none;
cursor: pointer;
}
.style2::-webkit-color-swatch {
border-radius: 50%;
border: 3px solid #000000;
}
.style2::-moz-color-swatch {
border-radius: 50%;
border: 3px solid #000000;
}
.box {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
align-items: center;
gap: 5px;
max-width: 320px;
margin: 0 auto;
padding: 7.5px 10px;
}
.box1 {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
align-items: center;
gap: 5px;
max-width: 9999px;
margin: 0 auto;
padding: 10px 10px;
}
.box5 {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
align-items: center;
gap: 5px;
max-width: 650px;
margin: 0 auto;
padding: 10px 10px;
}
.box2 {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
align-items: center;
gap: 5px;
max-width: 9999px;
margin: 0 auto;
padding: 10px 10px;
}
#selectedColor {
width: 100px;
height: 30px;
border: 3px solid black;
border-radius: 5px;
background-color: black;
}
.canvas {
height: 350px;
width: 650px;
border: 3px solid black;
border-radius: 5px;
background-color: white;
cursor: crosshair;
position: relative;
/* left: 50%; */
}
#clear {
width: 50px;
height: 35px;
font-size: 15px;
border-radius: 5px;
}
#submit {
width: 59px;
height: 23px;
margin: auto;
left: 35%;
border-radius: 5px;
position: relative;
}
.rangeslider {
width: 50%;
}
.myslider {
-webkit-appearance: none;
background: #FCF3CF ;
width: 50%;
height: 20px;
opacity: 2;
}
.myslider::-webkit-slider-thumb {
-webkit-appearance: none;
cursor: pointer;
background: #34495E ;
width: 5%;
height: 20px;
}
.myslider:hover {
opacity: 1;
}
.rangeslider {
left: 38%;
position: absolute;
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>replit</title>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="box5">
<canvas class="canvas" id="canvas"></canvas>
</div>
<div class="box1">
<button id="clear">Clear</button><br>
</div>
<div class="box1">
<div class="rangeslider">
<input type="range" min="1" max="100" value="5" class="myslider" id="sliderRange">
</div>
</div>
<div class=box1>
<div>
<input id="setSize" type="text" placeholder="Set Brush Size... (Max 100)">
<br>
<button type="submit" id="submit" for="setSize">Submit</button>
</div>
</div>
<div class="box">
<div class="container">
<input type="color" value="#000000" class="style2" id="1" />
</div>
<div class="container">
<input type="color" value="#ffffff" class="style2" id="2" />
</div>
<div class="container">
<input type="color" value="#ffffff" class="style2" id="3" />
</div>
<div class="container">
<input type="color" value="#ffffff" class="style2" id="4" />
</div>
<div class="container">
<input type="color" value="#ffffff" class="style2" id="5" />
</div>
</div>
<div class="box">
<label for="selectedColor">Current Color:</label>
<div id="selectedColor"></div>
</div>
<script src="script.js"></script>
</body>
</html>
Ich weiß, dass dieser Code etwas seltsam ist, aber lass es mich bitte wissen.
