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feat: Created class to get canvas and link it to a button #4

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feat: Created class to get canvas and link it to a button #4

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3 changes: 2 additions & 1 deletion .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -4,4 +4,5 @@ node_modules/
dist/
coverage/
.vscode/
.env
.env
.idea/
2 changes: 2 additions & 0 deletions src/index.html
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Expand Up @@ -8,6 +8,8 @@
</head>
<body>
<h1>Hello World!</h1>
<canvas id="canvas" width="500" height="500"></canvas>
<button id="move">Move</button>
<script src="./index.js"></script>
</body>
</html>
34 changes: 34 additions & 0 deletions src/index.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,34 @@
class Engine {

constructor(canvas, button, canvasSizeX, canvasSizeY) {
this.canvas = canvas; // canvas element
this.ctx = canvas.getContext('2d'); // Canvas' context
this.x = 0; // Default X Value of Rectangle
this.y = 0; // Default Y Value of Rectangle
this.size = 50; // Default size Value of Rectangle
this.ctx.fillRect(this.x, this.y, this.size, this.size);

// Event listener to move the rectangle around
button.addEventListener("click", (e) => {
let randomX = Math.floor(Math.random() * (canvasSizeX - this.size + 1));
let randomY = Math.floor(Math.random() * (canvasSizeY - this.size + 1));
this.moveRect(this.x, this.y, randomX, randomY);
this.x = randomX;
this.y = randomY;
});
}

// Function that moves the rectangle from one place to another
moveRect(oldX, oldY, newX, newY, sizeX = this.size, sizeY = this.size) {
this.ctx.clearRect(oldX, oldY, sizeX, sizeY);
this.ctx.fillRect(newX, newY, sizeX, sizeY);
}

}

// Load Canvas and button in the Engine Class
window.onload = () => {
let canvas = document.getElementById('canvas');
let button = document.getElementById('move');
let engine = new Engine(canvas, button, canvas.width, canvas.height);
};