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"/**\n"
" * The code below is based on SVGPan Library 1.2 and was modified for doxygen\n"
" * to support both zooming and panning via the mouse and via embedded bottons.\n"
" *\n"
" * This code is licensed under the following BSD license:\n"
" *\n"
" * Copyright 2009-2010 Andrea Leofreddi <a.leofreddi@itcharm.com>. All rights reserved.\n"
" * \n"
" * Redistribution and use in source and binary forms, with or without modification, are\n"
" * permitted provided that the following conditions are met:\n"
" * \n"
" * 1. Redistributions of source code must retain the above copyright notice, this list of\n"
" * conditions and the following disclaimer.\n"
" * \n"
" * 2. Redistributions in binary form must reproduce the above copyright notice, this list\n"
" * of conditions and the following disclaimer in the documentation and/or other materials\n"
" * provided with the distribution.\n"
" * \n"
" * THIS SOFTWARE IS PROVIDED BY Andrea Leofreddi ``AS IS'' AND ANY EXPRESS OR IMPLIED\n"
" * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND\n"
" * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Andrea Leofreddi OR\n"
" * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n"
" * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR\n"
" * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON\n"
" * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n"
" * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF\n"
" * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
" * \n"
" * The views and conclusions contained in the software and documentation are those of the\n"
" * authors and should not be interpreted as representing official policies, either expressed\n"
" * or implied, of Andrea Leofreddi.\n"
" */\n"
"\n"
"var root = document.documentElement;\n"
"var state = 'none';\n"
"var stateOrigin;\n"
"var stateTf = root.createSVGMatrix();\n"
"var cursorGrab = ' url(\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA4AAAAOCAMAAAAolt3jAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAAlQTFRFAAAA////////c3ilYwAAAAN0Uk5T//8A18oNQQAAAD1JREFUeNp0zlEKACAIA9Bt9z90bZBZkQj29qFBEuBOzQHSnWTTyckEfqUuZgFvslH4ch3qLCO/Kr8cAgwATw4Ax6XRCcoAAAAASUVORK5CYII=\"), move';\n"
"var zoomSteps = 10;\n"
"var zoomInFactor;\n"
"var zoomOutFactor;\n"
"var windowWidth;\n"
"var windowHeight;\n"
"var svgDoc;\n"
"var minZoom;\n"
"var maxZoom;\n"
"if (!window) window=this;\n"
"\n"
"/**\n"
" * Show the graph in the middle of the view, scaled to fit \n"
" */\n"
"function show()\n"
"{\n"
" if (window.innerHeight) // Firefox\n"
" {\n"
" windowWidth = window.innerWidth;\n"
" windowHeight = window.innerHeight;\n"
" }\n"
" else if (document.documentElement.clientWidth) // Chrome/Safari\n"
" {\n"
" windowWidth = document.documentElement.clientWidth\n"
" windowHeight = document.documentElement.clientHeight\n"
" }\n"
" if (!windowWidth || !windowHeight) // failsafe\n"
" {\n"
" windowWidth = 800;\n"
" windowHeight = 600;\n"
" }\n"
" minZoom = Math.min(windowHeight/viewHeight,windowWidth/viewWidth);\n"
" maxZoom = minZoom+1.5;\n"
" zoomInFactor = Math.pow(maxZoom/minZoom,1.0/zoomSteps);\n"
" zoomOutFactor = 1.0/zoomInFactor;\n"
"\n"
" var g = svgDoc.getElementById('viewport');\n"
" try\n"
" {\n"
" var bb = g.getBBox(); // this can throw an exception if css { display: none }\n"
" var tx = (windowWidth-viewWidth*minZoom+8)/(2*minZoom);\n"
" var ty = viewHeight+(windowHeight-viewHeight*minZoom)/(2*minZoom);\n"
" var a = 'scale('+minZoom+') rotate(0) translate('+tx+' '+ty+')';\n"
" g.setAttribute('transform',a);\n"
" }\n"
" catch(e) {}\n"
"}\n"
"\n"
"/**\n"
" * Register handlers\n"
" */\n"
"function init(evt) \n"
"{\n"
" svgDoc = evt.target.ownerDocument;\n"
" if (top.window && top.window.registerShow) // register show function in html doc for dynamic sections\n"
" {\n"
" top.window.registerShow(sectionId,show);\n"
" }\n"
" show();\n"
"\n"
" setAttributes(root, {\n"
" \"onmousedown\" : \"handleMouseDown(evt)\",\n"
" \"onmousemove\" : \"handleMouseMove(evt)\",\n"
" \"onmouseup\" : \"handleMouseUp(evt)\"\n"
" });\n"
"\n"
" if (window.addEventListener)\n"
" {\n"
" if (navigator.userAgent.toLowerCase().indexOf('webkit') >= 0 || \n"
" navigator.userAgent.toLowerCase().indexOf(\"opera\") >= 0 || \n"
" navigator.appVersion.indexOf(\"MSIE\") != -1)\n"
" {\n"
" window.addEventListener('mousewheel', handleMouseWheel, false); // Chrome/Safari/IE9\n"
" }\n"
" else\n"
" {\n"
" window.addEventListener('DOMMouseScroll', handleMouseWheel, false); // Others\n"
" }\n"
" }\n"
"}\n"
"\n"
"window.onresize=function()\n"
"{\n"
" if (svgDoc) { show(); }\n"
"}\n"
"\n"
"/**\n"
" * Instance an SVGPoint object with given event coordinates.\n"
" */\n"
"function getEventPoint(evt) \n"
"{\n"
" var p = root.createSVGPoint();\n"
" p.x = evt.clientX;\n"
" p.y = evt.clientY;\n"
" return p;\n"
"}\n"
"\n"
"/**\n"
" * Sets the current transform matrix of an element.\n"
" */\n"
"function setCTM(element, matrix) \n"
"{\n"
" var s = \"matrix(\" + matrix.a + \",\" + matrix.b + \",\" + matrix.c + \",\" + matrix.d + \",\" + matrix.e + \",\" + matrix.f + \")\";\n"
" element.setAttribute(\"transform\", s);\n"
"}\n"
"\n"
"/**\n"
" * Sets attributes of an element.\n"
" */\n"
"function setAttributes(element, attributes)\n"
"{\n"
" for (i in attributes)\n"
" element.setAttributeNS(null, i, attributes[i]);\n"
"}\n"
"\n"
"function doZoom(g,point,zoomFactor)\n"
"{\n"
" var p = point.matrixTransform(g.getCTM().inverse());\n"
" var k = root.createSVGMatrix().translate(p.x, p.y).scale(zoomFactor).translate(-p.x, -p.y);\n"
" var n = g.getCTM().multiply(k);\n"
" var s = Math.max(n.a,n.d);\n"
" if (s>maxZoom) n=n.translate(p.x,p.y).scale(maxZoom/s).translate(-p.x,-p.y);\n"
" else if (s<minZoom) n=n.translate(p.x,p.y).scale(minZoom/s).translate(-p.x,-p.y);\n"
" setCTM(g, n);\n"
" stateTf = stateTf.multiply(n.inverse());\n"
"}\n"
"\n"
"/**\n"
" * Handle mouse move event.\n"
" */\n"
"function handleMouseWheel(evt) \n"
"{\n"
" if (!evt) evt = window.evt;\n"
" if (evt.preventDefault) evt.preventDefault();\n"
" evt.returnValue = false;\n"
"\n"
" if (state!='pan')\n"
" {\n"
" var delta;\n"
" if (evt.wheelDelta)\n"
" {\n"
" delta = evt.wheelDelta / 7200; // Opera/Chrome/IE9/Safari\n"
" }\n"
" else\n"
" {\n"
" delta = evt.detail / -180; // Mozilla\n"
" }\n"
" var svgDoc = evt.target.ownerDocument;\n"
" var g = svgDoc.getElementById(\"viewport\");\n"
" var p = getEventPoint(evt);\n"
" doZoom(g,p,1+delta);\n"
" }\n"
"}\n"
"\n"
"/**\n"
" * Handle mouse move event.\n"
" */\n"
"function handleMouseMove(evt) \n"
"{\n"
" if(evt.preventDefault)\n"
" evt.preventDefault();\n"
"\n"
" evt.returnValue = false;\n"
"\n"
" var g = svgDoc.getElementById(\"viewport\");\n"
"\n"
" if (state == 'pan') \n"
" {\n"
" // Pan mode\n"
" var p = getEventPoint(evt).matrixTransform(stateTf);\n"
" setCTM(g,stateTf.inverse().translate(p.x - stateOrigin.x, p.y - stateOrigin.y));\n"
" } \n"
"}\n"
"\n"
"/**\n"
" * Handle click event.\n"
" */\n"
"function handleMouseDown(evt) \n"
"{\n"
" if(evt.preventDefault)\n"
" evt.preventDefault();\n"
" evt.returnValue = false;\n"
" var g = svgDoc.getElementById(\"viewport\");\n"
" state = 'pan';\n"
" stateTf = g.getCTM().inverse();\n"
" stateOrigin = getEventPoint(evt).matrixTransform(stateTf);\n"
" g.style.cursor = cursorGrab;\n"
"}\n"
"\n"
"/**\n"
" * Handle mouse button release event.\n"
" */\n"
"function handleMouseUp(evt) \n"
"{\n"
" if (evt.preventDefault) evt.preventDefault();\n"
" evt.returnValue = false;\n"
" var g = svgDoc.getElementById(\"viewport\");\n"
" g.style.cursor = \"default\";\n"
" // Quit pan mode\n"
" state = '';\n"
"}\n"
"\n"
"/**\n"
" * Dumps a matrix to a string (useful for debug).\n"
" */\n"
"function dumpMatrix(matrix) \n"
"{\n"
" var s = \"[ \" + matrix.a + \", \" + matrix.c + \", \" + matrix.e + \"\\n \" + matrix.b + \", \" + matrix.d + \", \" + matrix.f + \"\\n 0, 0, 1 ]\";\n"
" return s;\n"
"}\n"
"\n"
"/**\n"
" * Handler for pan buttons\n"
" */\n"
"function handlePan(x,y)\n"
"{\n"
" var g = svgDoc.getElementById(\"viewport\");\n"
" setCTM(g,g.getCTM().translate(x*20/minZoom,y*20/minZoom));\n"
"}\n"
"\n"
"/**\n"
" * Handle reset button\n"
" */\n"
"function handleReset()\n"
"{\n"
" show();\n"
"}\n"
"\n"
"/**\n"
" * Handler for zoom buttons\n"
" */\n"
"function handleZoom(evt,direction)\n"
"{\n"
" var g = svgDoc.getElementById(\"viewport\");\n"
" var factor = direction=='in' ? zoomInFactor : zoomOutFactor;\n"
" var m = g.getCTM();\n"
" var p = root.createSVGPoint();\n"
" p.x = windowWidth/2;\n"
" p.y = windowHeight/2;\n"
" doZoom(g,p,factor);\n"
"}\n"
"\n"
"\n"
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