Mercurial > hg > orthanc
view OrthancServer/Resources/Samples/WebApplications/DrawingDicomizer/drawing.js @ 5924:79cd099a2e8d find-refactoring
archive jobs: added missing mutex
author | Alain Mazy <am@orthanc.team> |
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date | Mon, 16 Dec 2024 12:43:57 +0100 |
parents | d25f4c0fa160 |
children |
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/** * Copyright 2010 William Malone (www.williammalone.com) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. **/ /** * This code comes from the blog entry "Create a Drawing App with * HTML5 Canvas and JavaScript" by William Malone. It is the "simple * demo" of a pure HTML5 drawing application. * * http://www.williammalone.com/articles/create-html5-canvas-javascript-drawing-app/ * * To keep this sample code as simple as possible, we do not implement * hacks for the canvas of Microsoft Internet Explorer. **/ if ($.browser.msie) { alert('Please use Mozilla Firefox or Google Chrome. Microsoft Internet Explorer is not supported.'); } var context; var clickX = new Array(); var clickY = new Array(); var clickDrag = new Array(); var paint; function addClick(x, y, dragging) { clickX.push(x); clickY.push(y); clickDrag.push(dragging); } function Redraw() { context.fillStyle = '#ffffff'; context.fillRect(0, 0, context.canvas.width, context.canvas.height); // Clears the canvas context.strokeStyle = '#df4b26'; context.lineJoin = 'round'; context.lineWidth = 5; for (var i=0; i < clickX.length; i++) { context.beginPath(); if (clickDrag[i] && i) { context.moveTo(clickX[i - 1], clickY[i - 1]); } else { context.moveTo(clickX[i] - 1, clickY[i]); } context.lineTo(clickX[i], clickY[i]); context.closePath(); context.stroke(); } } $(document).ready(function() { context = document.getElementById('canvas').getContext('2d'); Redraw(); $('#canvas').mousedown(function(e) { var mouseX = e.pageX - this.offsetLeft; var mouseY = e.pageY - this.offsetTop; paint = true; addClick(e.pageX - this.offsetLeft, e.pageY - this.offsetTop); Redraw(); }); $('#canvas').mousemove(function(e) { if(paint) { addClick(e.pageX - this.offsetLeft, e.pageY - this.offsetTop, true); Redraw(); } }); $('#canvas').mouseup(function(e) { paint = false; }); $('#canvas').mouseleave(function(e) { paint = false; }); });