签字板应用是通过创建自定义控件实现的，相关代码如下：
1.HTML
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 5 <meta http-equiv="X-UA-Compatible" content="IE=edge" /> 6 7 <script id="sap-ui-bootstrap" 8 type="text/javascript" 9 data-sap-ui-libs="sap.m" 10 data-sap-ui-theme="sap_bluecrystal" 11 src="https://sapui5.hana.ondemand.com/resources/sap-ui-core.js"></script> 12 13 </head> 14 <body class="sapUiBody"> 15 <div id="content"></div> 16 </body>
2.Javascript
1 jQuery(function() { 2 sap.ui.core.Control.extend('SignaturePad', { 3 metadata: { 4 properties: { 5 width: {type: 'int', defaultValue: 300}, 6 height: {type: 'int', defaultValue: 100}, 7 bgcolor: {type: 'string', defaultValue: '#ffa'}, 8 lineColor: {type: 'string', defaultValue: '#666'}, 9 penColor: {type: 'string', defaultValue: '#333'}, 10 signature: 'string' 11 } 12 }, 13 14 renderer: function(oRm, oControl) { 15 var bgColor = oControl.getBgcolor(); 16 var lineColor = oControl.getLineColor(); 17 var pen = oControl.getPenColor(); 18 var id = oControl.getId(); 19 var w = oControl.getWidth(); 20 var h = oControl.getHeight(); 21 oRm.write("<div"); 22 oRm.writeControlData(oControl); 23 oRm.write(">"); 24 oRm.write('<svg xmlns="http://www.w3.org/2000/svg" width="' + w + 25 '" height="' + h + '" viewBox="0 0 ' + w + ' ' + h + '">'); 26 27 oRm.write('<rect id="' + id + '_r" width="' + w + '" height="' + h + 28 '" fill="' + bgColor + '"/>'); 29 30 var hh = h - 20; 31 oRm.write('<line x1="0" y1="' + hh + '" x2="' + w + '" y2="' + hh + 32 '" stroke="' + lineColor + 33 '" stroke-width="1" stroke-dasharray="3" ' + 34 'shape-rendering="crispEdges" pointer-events="none"/>'); 35 36 oRm.write('<path id="' + id + '_p" stroke="' + pen + '" stroke-width="2" ' + 37 'fill="none" pointer-events="none"/>'); 38 oRm.write('</svg>'); 39 oRm.write("</div>"); 40 }, 41 42 clear: function() { 43 this.signaturePath = ''; 44 var p = document.getElementById(this.getId() + '_p'); 45 p.setAttribute('d', ''); 46 }, 47 48 onAfterRendering: function() { 49 var that = this; 50 this.signaturePath =''; 51 isDown = false; 52 var elm = this.$()[0]; 53 var r = document.getElementById(this.getId() + '_r'); 54 var p = document.getElementById(this.getId() + '_p'); 55 56 function isTouchEvent(e) { 57 return e.type.match(/^touch/); 58 } 59 60 function getCoords(e) { 61 if (isTouchEvent(e)) { 62 return e.targetTouches[0].clientX + ',' + 63 e.targetTouches[0].clientY; 64 } 65 return e.clientX + ',' + e.clientY; 66 } 67 68 function down(e) { 69 that.signaturePath += 'M' + getCoords(e) + ' '; 70 p.setAttribute('d', that.signaturePath); 71 isDown = true; 72 if (isTouchEvent(e)) e.preventDefault(); 73 } 74 75 function move(e) { 76 if (isDown) { 77 that.signaturePath += 'L' + getCoords(e) + ' '; 78 p.setAttribute('d', that.signaturePath); 79 } 80 if (isTouchEvent(e)) e.preventDefault(); 81 } 82 83 function up(e) { 84 isDown = false; 85 if (isTouchEvent(e)) e.preventDefault(); 86 } 87 88 r.addEventListener('mousedown', down, false); 89 r.addEventListener('mousemove', move, false); 90 r.addEventListener('mouseup', up, false); 91 r.addEventListener('touchstart', down, false); 92 r.addEventListener('touchmove', move, false); 93 r.addEventListener('touchend', up, false); 94 r.addEventListener('mouseout', up, false); 95 96 if (this.getSignature()) { 97 console.log('asdasda'); 98 this.signaturePath = this.getSignature(); 99 var p = document.getElementById(this.getId() + '_p'); 100 if (p) { 101 p.setAttribute('d', this.signaturePath); 102 } 103 } 104 105 this.setSignature = function(s) { 106 this.setProperty('signature', s); 107 this.invalidate(); 108 } 109 } 110 }); 111 112 var oCtrl = new SignaturePad(); 113 oCtrl.placeAt('content'); 114 115 (new sap.m.Button({ 116 text: 'Clear', 117 press: function() { 118 prevSignature = oCtrl.getSignature(); 119 if (prevSignature) { 120 undo.setEnabled(true); 121 } 122 oCtrl.clear(); 123 } 124 })).placeAt('content'); 125 126 (new sap.m.Button({ 127 text: 'Accept', 128 press: function() { 129 sap.m.MessageToast.show(oCtrl.getSignature()); 130 } 131 })).placeAt('content'); 132 133 var prevSignature = null; 134 135 var undo = new sap.m.Button({ 136 text: 'Undo', 137 enabled: false, 138 press: function() { 139 oCtrl.setSignature(prevSignature); 140 } 141 }); 142 undo.placeAt('content'); 143 144 oCtrl.setSignature('M48,46 L47,46 L43,46 L42,46 L40,46 L39,46 L38,46 L37,46 L36,46 L36,47 L35,47 L35,48 L35,49 L35,51 L37,51 L38,51 L39,53 L40,54 L42,55 L43,57 L44,57 L44,59 L44,60 L44,61 L43,61 L41,61 L37,61 L34,61 L31,61 L29,61 L28,61 L27,61 L28,61 M49,47 L49,48 L49,49 L49,51 L49,52 L49,54 L49,55 L50,56 L50,58 L50,57 L50,55 L50,54 L50,53 L50,51 L52,51 L52,51 L52,49 L52,48 L53,48 L53,47 L54,47 L54,47 L55,47 L56,47 L57,49 L58,50 L60,51 L60,53 L62,54 L62,55 L63,56 L63,57 L63,58 L63,59 L63,61 L64,61 L64,61 L64,62 M56,57 L57,56 L60,56 L62,55 L63,55 L64,54 L65,54 M69,47 L69,48 L69,49 L69,51 L69,54 L69,55 L69,57 L69,58 L69,60 L69,60 L69,61 M67,45 L67,44 L68,43 L68,43 L71,41 L73,41 L76,41 L77,40 L78,40 L79,40 L80,41 L80,41 L80,42 L80,43 L80,44 L80,44 L80,45 L78,45 L77,46 L75,47 L74,47 L72,49 L72,49 L71,49 L69,49 L68,49 L67,49 M87,41 L87,42 L87,43 L87,44 L87,46 L87,48 L87,49 L87,51 L87,52 L88,53 L88,53 L89,53 L90,54 L91,55 L92,55 L94,55 L95,57 L96,57 L97,57 L98,56 L98,55 L98,54 L99,53 L99,52 L99,50 L99,49 L99,47 L99,46 L99,45 L99,43 L99,43 L99,42 L99,41 L99,40 M107,40 L107,41 L107,42 L107,44 L107,46 L107,49 L107,50 L107,52 L107,52 M121,36 L121,37 L121,38 L121,39 L120,42 L120,43 L120,45 L120,46 L120,47 L120,48 L120,48 L120,47 L122,47 L122,47 L122,45 L124,45 L125,44 L127,44 L130,44 L133,44 L136,45 L139,46 L141,46 L141,47 L141,47 L141,48 L141,50 L139,51 L138,52 L136,53 L133,55 L129,56 L126,56 L123,57 L120,57 L119,57 L117,57 L117,56 M122,38 L122,37 L123,37 L125,36 L130,36 L133,33 L138,32 L142,30 L145,28 L147,28'); 145 });
3.测试
