317 lines
11 KiB
HTML
317 lines
11 KiB
HTML
<!DOCTYPE html>
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<html lang="en" dir="ltr">
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<head>
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<meta charset="utf-8">
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<title>MT Request: draw over the image</title>
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<style media="screen">
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#sample, svg{
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position:absolute;
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top: 0;
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left: 0;
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bottom: 0;
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right:0;
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width:100%;
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height:100%;
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font-family: sans-serif;
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}
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path {
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fill: none;
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stroke: red;
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stroke-width: 2px;
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}
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body.submitted path{
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stroke:darkgray;
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}
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body.submitted .buttons{
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display:none;
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}
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/*#wrapper {
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height: calc({DRAW_HEIGHT}/{HEIGHT} * 100%);
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width: calc({DRAW_WIDTH}/{WIDTH} * 100%);
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position: absolute;
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left: calc(({WIDTH} - {DRAW_WIDTH})/2/{WIDTH} * 100%);
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top: calc(({HEIGHT} - {DRAW_HEIGHT})/2/{HEIGHT} * 100%);
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background:none;
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cursor: url(cursor.png) 6 6, auto;
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}*/
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#wrapper {
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position:absolute;
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top:0;
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right:0;
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bottom:0;
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left:0;
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background:none;
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cursor: url(cursor.png) 6 6, auto;
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}
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.gray{
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position:absolute;
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background:rgba(255,255,255,0.7);
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}
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#gray_top{
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left:0;
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right:0;
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top:0;
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height:calc({TOP_PADDING}/{HEIGHT} * 100%);
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}
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#gray_bottom{
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left:0;
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right:0;
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bottom:0;
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height:calc(({HEIGHT} - {DRAW_HEIGHT} - {TOP_PADDING})/{HEIGHT} * 100%);
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}
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#gray_left{
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left:0;
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top:calc({TOP_PADDING}/{HEIGHT} * 100%);
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height: calc({DRAW_HEIGHT}/{HEIGHT} * 100%);
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width: calc({LEFT_PADDING}/{WIDTH} * 100%);
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}
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#gray_right{
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right:0;
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top:calc({TOP_PADDING}/{HEIGHT} * 100%);
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height: calc({DRAW_HEIGHT}/{HEIGHT} * 100%);
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width: calc(({WIDTH} - {DRAW_WIDTH} - {LEFT_PADDING})/{WIDTH} * 100%);
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}
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html, body{
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height: 100%;
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width: 100%;
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margin:0;
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background:gray;
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}
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#interface{
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background:white;
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height: 0;
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overflow: hidden;
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padding-top: calc({HEIGHT}/{WIDTH} * 100%);
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background: white;
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position: relative;
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margin: 0 auto;
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background-size: 100% 100%;
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}
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#innerface{
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position: absolute;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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}
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@media (min-aspect-ratio: {WIDTH}/{HEIGHT}) {
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#interface {
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height: 100vh;
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width: calc({WIDTH}/{HEIGHT} * 100vh);
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padding-top:0;
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}
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}
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#info{
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position: absolute;
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bottom: 5px;
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width: 600px;
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left: calc(50% - 250px);
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z-index: 999;
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}
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.buttons{
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text-align: center;
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}
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</style>
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</head>
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<body>
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<div id='interface' style="background-image:url('{IMAGE_URL}')">
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<div id='innerface'>
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<div id='wrapper'>
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<!-- <img src="{IMAGE_URL}" id='sample'>-->
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<svg id="canvas" viewBox="0 0 {WIDTH}0 {HEIGHT}0" width="{WIDTH}mm" height="{HEIGHT}mm" preserveAspectRatio="none">
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<path d="" id="stroke" />
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</svg>
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</div>
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<div id='info'>
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<ul>
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<li>Drag the mouse to trace the <strong>clearest lines</strong> drawing above</li>
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<li>Follow the lines as precise as possible</li>
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<li>Press submit when you're done.</li>
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<li>You'll receive a submission token, to fill in at Mechanical Turk</li>
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</ul>
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<div class='buttons'>
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<button id='submit'>Submit</button>
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<!-- <button id='reset'>Reset</button>-->
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</div>
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<div id='message'></div>
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</div>
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<div class='gray' id='gray_top'></div>
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<div class='gray' id='gray_bottom'></div>
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<div class='gray' id='gray_left'></div>
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<div class='gray' id='gray_right'></div>
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</div>
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</div>
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<script type="text/javascript">
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let url = window.location.origin.replace('http', 'ws') +'/ws?' + window.location.search.substring(1);
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let svgEl = document.getElementById("canvas");
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let strokeEl = document.getElementById('stroke');
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let submitEl = document.getElementById('submit');
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let resetEl = document.getElementById('reset');
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let messageEl = document.getElementById('message');
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let innerFaceEl = document.getElementById('innerface'); // wrapper within the interface
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let svgWidth = {WIDTH};
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let svgHeight = {HEIGHT};
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let drawWidth = {DRAW_WIDTH};
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let drawHeight = {DRAW_HEIGHT};
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let xPadding = {LEFT_PADDING} / svgWidth;
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let yPadding = {TOP_PADDING} / svgHeight;
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let drawWidthFactor = drawWidth / svgWidth;
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let drawHeightFactor = drawHeight / svgHeight;
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let strokes = [];
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let isDrawing = false;
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let hasMouseDown = false;
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let currentPoint = null;
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let getCoordinates = function(e) {
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// convert event coordinates into relative positions on x & y axis
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let box = innerFaceEl.getBoundingClientRect();
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let x = (e.x - box['left']) / box['width'];
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let y = (e.y - box['top']) / box['height'];
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return {'x': x, 'y': y};
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}
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let isInsideBounds = function(pos) {
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return !(pos['x'] < 0 || pos['y'] < 0 || pos['x'] > 1 || pos['y'] > 1);
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}
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let isInsideDrawingBounds = function(pos) {
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if(pos['x'] > xPadding && pos['x'] < (xPadding+drawWidthFactor) && pos['y'] > yPadding && pos['y'] < yPadding+drawHeightFactor) {
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return true;
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}
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return false;
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}
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let draw = function(e) {
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let pos = getCoordinates(e);
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if(!isInsideBounds(pos)) {
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// outside of bounds
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return;
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}
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if(isDrawing && !isInsideDrawingBounds(pos)){
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stopDrawing(pos);
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}
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if(!isDrawing && hasMouseDown && isInsideDrawingBounds(pos)){
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isDrawing = true;
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}
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if(isDrawing) {
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strokes.push([pos['x'], pos['y'], 0]);
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let d = strokes2D(strokes);
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strokeEl.setAttribute('d', d);
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}
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console.log([pos['x'], pos['y']], isDrawing);
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socket.send(JSON.stringify({
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'action': 'move',
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'direction': [pos['x'], pos['y']],
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'mouse': isDrawing,
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}));
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};
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let stopDrawing = function(pos) {
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if(!isDrawing) {
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return;
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}
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isDrawing = false;
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//document.body.removeEventListener('mousemove', draw);
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if(strokes.length > 0){
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// mark point as last of stroke
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strokes[strokes.length - 1][2] = 1;
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}
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socket.send(JSON.stringify({
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'action': 'up',
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'direction': [pos['x'], pos['y']]
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}));
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}
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let penup = function(e) {
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if(!hasMouseDown) {
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return;
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}
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hasMouseDown = false;
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let pos = getCoordinates(e);
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stopDrawing(pos);
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};
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let strokes2D = function(strokes) {
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// strokes to a d attribute for a path
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let d = "";
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let last_stroke = undefined;
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let cmd = "";
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for (let stroke of strokes) {
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if(!last_stroke) {
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d += `M${stroke[0]*svgWidth*10},${stroke[1]*svgHeight*10} `;
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cmd = 'M';
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} else {
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if (last_stroke[2] == 1) {
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d += " m";
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cmd = 'm';
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} else if (cmd != 'l') {
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d+=' l ';
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cmd = 'l';
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}
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let rel_stroke = [stroke[0] - last_stroke[0], stroke[1] - last_stroke[1]];
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d += `${rel_stroke[0]*svgWidth*10},${rel_stroke[1]*svgHeight*10} `;
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}
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last_stroke = stroke;
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}
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return d;
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}
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let startDrawing = function(e){
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hasMouseDown = true;
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};
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/*let reset = function() {
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strokes = [];
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strokeEl.setAttribute('d', "");
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socket.send(JSON.stringify({
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'action': 'reset',
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}));
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}*/
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let socket = new WebSocket(url);
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document.body.addEventListener('mousemove', draw);
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document.body.addEventListener('mouseup', penup);
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document.body.addEventListener('mousedown', startDrawing);
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socket.addEventListener('message', function(e){
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let msg = JSON.parse(e.data);
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console.log('receive', msg);
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if(msg['action'] == 'submitted') {
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document.body.classList.add('submitted');
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messageEl.innerHTML = msg['msg'];
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svgEl.removeEventListener('mousedown', startDrawing);
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}
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});
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//resetEl.addEventListener('click', reset);
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submitEl.addEventListener('click', function(e){
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if(!strokes.length){
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alert('please draw before submitting');
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return;
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}
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socket.send(JSON.stringify({
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'action': 'submit'
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}));
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document.body.removeEventListener('mousemove', draw);
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document.body.removeEventListener('mouseup', penup);
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document.body.removeEventListener('mousedown', startDrawing);
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});
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</script>
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</body>
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</html>
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