365 lines
9.9 KiB
HTML
365 lines
9.9 KiB
HTML
<!DOCTYPE html>
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<html lang=de">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>LED Board</title>
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<style>
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body {background-color: #ccc; margin: 0; padding: 0; text-align: center;}
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input {background-color: #ccc; border-radius: 2px;}
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.menu { background-color: rgb(4, 0, 59); color: #ccc; padding: 1.2em; width: 100%; box-sizing: border-box; margin-bottom: 1em;}
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.btn { background-color: #005; border-radius: 2px; color:#ccc; box-shadow: 5px, 5px, 5px, #000; padding: 5px;}
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</style>
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</head>
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<body>
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<div class="menu">
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IP: <input type="text" id="ip" value="10.23.42.24">
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<div style="width: 2em; display: inline-block;" ></div>
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Port: <input type="text" id="port" value="81" style="width: 2.5em;">
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<div style="width: 2em; display: inline-block;" ></div>
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Panel width: <input type="text" id="width" value="32" style="width: 2.5em;" onchange="creatGUI()">
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height: <input type="text" id="height" value="40" style="width: 2.5em;" onchange="creatGUI()">
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<div style="width: 1em; display: inline-block;" ></div>
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Connection state: <div id="connectionState" onclick="toggleConnection()" style="background-color: red; display: inline-block; width: 1em; height: 1em; border-radius: 0.5em;"></div>
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</div>
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<input class="btn" type="button" value="clear" onclick="clearCanvas()">
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<input type="file" id="fileupload" value="upload file" style="display: none;" />
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<label class="btn" for="fileupload">upload a file</label>
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<br />
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<canvas id="can" style="background-color:#000; margin: 1em;"></canvas> <br />
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<textarea id="textInput"></textarea><br />
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<input type="button" value="print" onclick="textInputChanged()" />
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<script type="text/javascript">
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var socket;
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document.onload = openWebSocket();
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var isTouch = (('ontouchstart' in window) || (navigator.msMaxTouchPoints > 0));
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var canvas, ctx = false,
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prevX = 0,
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currX = 0,
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prevY = 0,
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currY = 0,
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dragMode = false;
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var onColor = "#fd0";
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var offColor = "#310";
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var pixelBuffer = new Array(0);
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var scaling;
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var xMax, yMax;
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var changeFlag = false;
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var frameRate = 3; //frames per second
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creatGUI();
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setTimeout(frameRefresh, 1000 / frameRate);
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function openWebSocket()
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{
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ip = document.getElementById('ip').value;
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port = document.getElementById('port').value;
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panelWidthElement = document.getElementById('width');
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panelHeightElement = document.getElementById('height');
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displayView = document.getElementById("can");
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console.log("connect to " + ip + ":" + port);
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socket = new WebSocket('ws://' + ip + ':'+port+'', ['arduino']);
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socket.onopen = function ()
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{
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console.log('connected');
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document.getElementById('connectionState').style.backgroundColor = "#3d3";
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};
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socket.onerror = function (error)
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{
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console.log('WebSocket Error ', error);
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document.getElementById('connectionState').style.backgroundColor = "#dd3";
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};
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socket.onclose = function ()
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{
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console.log('WebSocket connection closed');
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document.getElementById('connectionState').style.backgroundColor = "#d33";
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};
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}
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function frameRefresh()
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{
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if(changeFlag==true && socket.readyState === WebSocket.OPEN)
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{
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changeFlag = false;
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sendPixelBuffer();
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console.log("refreshed");
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}
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setTimeout(frameRefresh, 1000 / frameRate);
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}
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function toggleConnection()
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{
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if(socket.readyState === WebSocket.CLOSED)
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{
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openWebSocket();
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}
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else
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{
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socket.close();
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}
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}
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function sendPixelBuffer()
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{
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header = new Uint8Array(6);
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header[0] = Math.floor(xMax / 255);
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header[1] = xMax % 255;
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header[2] = Math.floor(yMax / 255);
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header[3] = yMax % 255;
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header[4] = 0;
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header[5] = 0;
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socket.send(header);
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socket.send(pixelBuffer);
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}
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function creatGUI()
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{
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scaling = 10;//(document.width / 2) / panelWidthElement.value;
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xMax = panelWidthElement.value;
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yMax = panelHeightElement.value;
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displayView.width = panelWidthElement.value*scaling;// + "px";
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displayView.height = panelHeightElement.value*scaling;// + "px";
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pixelBuffer = new Uint8Array(xMax*yMax);
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initCanvas();
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}
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function clearCanvas()
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{
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ctx = canvas.getContext("2d");
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ctx.clearRect(0, 0, displayView.width, displayView.height);
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for(x = 0; x < xMax; x++)
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{
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for(y = 0; y < yMax; y++)
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{
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pixelBuffer[x, xMax*y] = 0;
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drawDot(x*scaling+1, y*scaling +1, true);
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}
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}
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}
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function initCanvas() {
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canvas = document.getElementById('can');
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ctx = canvas.getContext("2d");
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w = canvas.width;
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h = canvas.height;
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canvas.addEventListener("mousemove", function (e) {
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findxy('move', e)
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}, false);
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canvas.addEventListener("mousedown", function (e) {
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findxy('down', e)
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}, false);
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canvas.addEventListener("mouseup", function (e) {
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findxy('up', e)
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}, false);
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canvas.addEventListener("mouseout", function (e) {
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findxy('out', e)
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}, false);
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clearCanvas();
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}
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function findxy(res, e) {
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if (res == 'down') {
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prevX = currX;
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prevY = currY;
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currX = e.clientX - canvas.offsetLeft;
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currY = e.clientY - canvas.offsetTop;
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drawDot(currX, currY);
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dragMode = true;
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}
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if (res == 'up' || res == "out") {
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dragMode = false;
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}
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if (res == 'move') {
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if (dragMode) {
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prevX = currX;
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prevY = currY;
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currX = e.clientX - canvas.offsetLeft;
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currY = e.clientY - canvas.offsetTop;
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drawDot(currX, currY);
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}
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}
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}
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function drawDot(x, y, forceOff=false)
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{
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x = Math.floor(x / scaling);
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y = Math.floor(y / scaling);
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if((pixelBuffer[x+xMax*y] == 0 || dragMode==true) && forceOff==false)
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{
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ctx.fillStyle = onColor;
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if(pixelBuffer[x+xMax*y] != 1)
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{
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changeFlag = true;
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}
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pixelBuffer[x+xMax*y] = 1;
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}
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else
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{
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ctx.fillStyle = offColor;
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if(pixelBuffer[x+xMax*y] != 0)
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{
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changeFlag = true;
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}
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pixelBuffer[x+xMax*y] = 0;
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}
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ctx.beginPath();
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ctx.arc(x * scaling + scaling/2, y * scaling + scaling/2, scaling/2, 0, 2 * Math.PI);
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ctx.fill();
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ctx.stroke();
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}
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function displayBufferContent()
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{
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dragMode = true;
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for(x = 0; x < xMax; x++)
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{
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for(y = 0; y < yMax; y++)
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{
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if(pixelBuffer[x + xMax*y] != 0)
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{
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drawDot(x*scaling+1, y*scaling +1);
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}
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else
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{
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drawDot(x*scaling+1, y*scaling +1, true);
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}
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}
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}
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dragMode = false;
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changeFlag = true;
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}
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//====================================================================
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//========= image upload functione... ==========
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//====================================================================
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document.getElementById("fileupload").addEventListener('change', imageChanged, false);
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hiddenCanvas = document.createElement("canvas");
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hiddenCtx = hiddenCanvas.getContext('2d');
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function imageChanged(evt)
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{
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var file = evt.target.files[0];
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if (!file.type.match('image.*'))
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{
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alert("wrong file format");
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return;
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}
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var reader = new FileReader();
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reader.onload = function (event)
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{
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var img = new Image();
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img.src = event.target.result;
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img.onload = function()
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{
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width = img.width;
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height = img.height;
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if (width > height)
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{
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if (width > xMax)
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{
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height *= xMax / width;
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width = xMax;
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}
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}
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else
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{
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if (height > yMax)
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{
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width *= yMax / height;
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height = yMax;
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}
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}
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hiddenCanvas.width = width;
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hiddenCanvas.height = height;
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hiddenCtx.drawImage(img, 0, 0, width, height);
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showHiddenCanvas();
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}
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img.src = event.target.result;
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};
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reader.readAsDataURL(file);
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}
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function showHiddenCanvas()
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{
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for(var y = 0; y < yMax; y++)
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{
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for(var x = 0; x < xMax; x++)
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{
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var p = hiddenCtx.getImageData(x, y, 1, 1).data;
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if((p[0] < 128 || p[1] < 128 || p[2] < 128) && p[3] > 128)
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{
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pixelBuffer[x+xMax*y] = 1;
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}
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else
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{
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pixelBuffer[x+xMax*y] = 0;
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}
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}
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}
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displayBufferContent();
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}
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function printText(texttodraw)
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{
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hiddenCanvas.width = xMax;
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hiddenCanvas.height = yMax;
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var lines = texttodraw.split('\n');
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hiddenCtx.clearRect(0, 0, hiddenCanvas.width, hiddenCanvas.height);
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hiddenCtx.font = '10px Verdana';
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hiddenCtx.textBaseline="top";
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var lineheight = 10;
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for (var j = 0; j<lines.length; j++)
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{
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hiddenCtx.fillText(lines[j], 0, 0 + (j*lineheight));
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}
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showHiddenCanvas();
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}
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function textInputChanged()
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{
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var text = document.getElementById("textInput").value;
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printText(text);
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}
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</script>
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</body>
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</html>
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