Lección wesbos#8

PabloContreras · PabloContreras · commit b9e980804a29 · 2018-03-01T16:09:17.000-06:00
diff --git a/08 - Fun with HTML5 Canvas/index-START.html b/08 - Fun with HTML5 Canvas/index-START.html
@@ -5,8 +5,53 @@
   <title>HTML5 Canvas</title>
 </head>
 <body>
-<canvas id="draw" width="800" height="800"></canvas>
+<canvas id="draw" width="1000" height="1000"></canvas>
 <script>
+const canvas = document.querySelector('#draw');
+const ctx = canvas.getContext('2d');
+canvas.width = window.innerWidth;
+canvas.height = window.innerHeight;
+//ctx.strokeStyle = '#BADA55';
+ctx.lineJoin = 'round';
+ctx.lineCap = 'round';
+ctx.lineWidth = 100;
+
+let isDrawing = false;
+let lastX = 0;
+let lastY = 0;
+let hue = 0;
+let direction = true;
+function draw(e){
+	if (!isDrawing) return;
+	console.log(e);
+	//cambio de color
+	ctx.strokeStyle = `hsl(${hue}, 100%, 50%)`;
+	ctx.beginPath();
+	ctx.moveTo(lastX, lastY);
+	ctx.lineTo(e.offsetX, e.offsetY);
+	ctx.stroke();
+	[lastX, lastY] = [e.offsetX, e.offsetY];
+	hue++;
+	if (hue >= 360) {
+   		hue = 0;
+  	}
+  	if (ctx.lineWidth >= 100 || ctx.lineWidth <= 1) {
+    	direction = !direction;
+  	}
+	if(direction) {
+    	ctx.lineWidth++;
+  	} else {
+    	ctx.lineWidth--;
+  	}
+
+}
+canvas.addEventListener('mousedown', (e) =>{
+	isDrawing = true;
+	[lastX, lastY] = [e.offsetX, e.offsetY];	
+});
+canvas.addEventListener('mousemove', draw);
+canvas.addEventListener('mouseup', () => isDrawing = false);
+canvas.addEventListener('mouseout', () => isDrawing = false);
 </script>
 
 <style>
