From 260bda45a951be70bba4b728abf1e863a09a2526 Mon Sep 17 00:00:00 2001
From: adanrsantos <adanrsantos2016@gmail.com>
Date: Wed, 9 Oct 2024 23:18:42 -0500
Subject: [PATCH] added drawing to the canvas

---
 static/canvas.css  | 35 ++++++++++++++++++++++++++++-
 static/canvas.html | 17 ++++++++++++--
 static/canvas.js   | 56 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 105 insertions(+), 3 deletions(-)

diff --git a/static/canvas.css b/static/canvas.css
index ad81b73..60a531a 100644
--- a/static/canvas.css
+++ b/static/canvas.css
@@ -23,14 +23,47 @@ html, body {
 
 .canvasCont {
     display: flex;
+    flex-direction: column;
     justify-content: center;
     align-items: center;
-    padding: 20px;
     background-color: yellow;
     border: solid black;
     border-radius: 20px;
 }
 
+.toolbar {
+    display: flex;
+    justify-content: space-around;
+    align-items: center;
+    border-top: solid black 1px;
+    width: 100%;
+    height: 60px;
+    z-index: 10;
+}
+
+.toolbarItems {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    font-weight: 900;
+    color: blue;
+    text-align: center;
+    height: 100%;
+    width: 100px;
+}
+
+.strokePicker {
+    padding: 0;
+    margin: 0;
+    width: 100%;
+}
+
+.strokePicker:hover {
+    cursor: pointer;
+}
+
+
 canvas {
     background-color: lightblue;
+    margin: 20px;
 }
\ No newline at end of file
diff --git a/static/canvas.html b/static/canvas.html
index 6152038..f4e0c3a 100644
--- a/static/canvas.html
+++ b/static/canvas.html
@@ -18,8 +18,21 @@
       </div>
       <div class="canvasCont">
         <canvas id="canvas" width="850" height="500" style="border:1px solid #000000;" alt="canvas"></canvas>
-  
+        <div id="toolbar" class="toolbar">
+          <div class="toolbarItems">
+            <label for="stroke">Strokes</label>
+            <input id="stroke" name="stroke" type="color" class="strokePicker">
+          </div>
+          <div class="toolbarItems">
+            <label for="lineWidth">Line Width</label>
+            <input id="lineWidth" name="lineWidth" type="number" value="5" min="1" max="10">
+          </div>
+          <div class="toolbarItems">
+            <button id="clear">Clear</button>
+          </div>
+        </div>
       </div>  
-    </div>   
+    </div>
+    <script src="./canvas.js"></script>   
   </body>
 </html>
\ No newline at end of file
diff --git a/static/canvas.js b/static/canvas.js
index e69de29..f88c632 100644
--- a/static/canvas.js
+++ b/static/canvas.js
@@ -0,0 +1,56 @@
+const canvas = document.getElementById("canvas");
+const toolbar = document.getElementById("toolbar");
+const strokePicker = document.getElementById("stroke");
+const ctx = canvas.getContext("2d");
+
+const canvasOffsetX = canvas.offsetLeft;
+const canvasOffsetY = canvas.offsetTop;
+
+canvas.width = 850;
+canvas.height = 500;
+
+let isPainting = false;
+let lineWidth = 5;
+let strokeColor = "#000000";
+let startX;
+let startY;
+
+toolbar.addEventListener("click", e => {
+    if (e.target.id === "clear"){
+        ctx.clearRect(0, 0, canvas.width, canvas.height);
+    }
+
+    if (e.target.id === "lineWidth"){
+        lineWidth = e.target.value;
+    }
+});
+
+strokePicker.addEventListener("input", (e) => {
+    strokeColor = e.target.value;
+});
+
+const draw = (e) => {
+    if (!isPainting){
+        return;
+    }
+    ctx.lineWidth = lineWidth;
+    ctx.strokeStyle = strokeColor;
+    ctx.lineCap = "round";
+
+    ctx.lineTo(e.clientX - canvasOffsetX, e.clientY - canvasOffsetY);
+    ctx.stroke();
+}
+
+canvas.addEventListener("mousedown", (e) => {
+    isPainting = true;
+    startX = e.clientX;
+    startY = e.clientY;
+});
+
+canvas.addEventListener("mouseup", (e) => {
+    isPainting = false;
+    ctx.stroke();
+    ctx.beginPath();
+});
+
+canvas.addEventListener("mousemove", draw);
\ No newline at end of file