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  • UI5-技术篇-签字板

    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          {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

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  • 原文地址:https://www.cnblogs.com/ricoo/p/11347715.html
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