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(function (window, document, $) {
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'use strict';
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// Get a regular interval for drawing to the screen
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window.requestAnimFrame = (function (callback) {
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return window.requestAnimationFrame ||
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window.webkitRequestAnimationFrame ||
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window.mozRequestAnimationFrame ||
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window.oRequestAnimationFrame ||
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window.msRequestAnimaitonFrame ||
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function (callback) {
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window.setTimeout(callback, 1000 / 60);
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};
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})();
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/*
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* Plugin Constructor
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*/
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var pluginName = 'jqSignature',
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defaults = {
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lineColor: '#222222',
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lineWidth: 1,
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border: '1px dashed #AAAAAA',
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background: '#FFFFFF',
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width: 300,
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height: 100,
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autoFit: false
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},
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canvasFixture = '<canvas></canvas>';
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function Signature(element, options) {
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// DOM elements/objects
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this.element = element;
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this.$element = $(this.element);
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this.canvas = false;
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this.$canvas = false;
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this.ctx = false;
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// Drawing state
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this.drawing = false;
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this.currentPos = {
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x: 0,
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y: 0
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};
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this.lastPos = this.currentPos;
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// Determine plugin settings
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this._data = this.$element.data();
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this.settings = $.extend({}, defaults, options, this._data);
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// Initialize the plugin
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this.init();
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}
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Signature.prototype = {
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// Initialize the signature canvas
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init: function () {
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// Set up the canvas
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this.$canvas = $(canvasFixture).appendTo(this.$element);
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this.$canvas.attr({
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width: this.settings.width,
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height: this.settings.height
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});
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this.$canvas.css({
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boxSizing: 'border-box',
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width: this.settings.width + 'px',
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height: this.settings.height + 'px',
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border: this.settings.border,
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background: this.settings.background,
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cursor: 'crosshair'
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});
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// Fit canvas to width of parent
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if (this.settings.autoFit === true) {
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this._resizeCanvas();
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// TO-DO - allow for dynamic canvas resizing
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// (need to save canvas state before changing width to avoid getting cleared)
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// var timeout = false;
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// $(window).on('resize', $.proxy(function(e) {
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// clearTimeout(timeout);
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// timeout = setTimeout($.proxy(this._resizeCanvas, this), 250);
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// }, this));
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}
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this.canvas = this.$canvas[0];
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this.cxt = this.canvas.getContext('2d');
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this.x = []; //<2F><>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD>ƶ<EFBFBD><C6B6>ǵ<EFBFBD>X<EFBFBD><58><EFBFBD><EFBFBD>
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this.y = []; //<2F><>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD>ƶ<EFBFBD><C6B6>ǵ<EFBFBD>Y<EFBFBD><59><EFBFBD><EFBFBD>
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this.clickDrag = [];
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this.lock = false; //<2F><><EFBFBD><EFBFBD><EFBFBD>ƶ<EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD>ж<EFBFBD><D0B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD><EFBFBD>
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this.storageColor = "#000000";
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this.cxt.lineJoin = "round"; //context.lineJoin - ָ<><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߶ε<DFB6><CEB5><EFBFBD><EFBFBD>ӷ<EFBFBD>ʽ
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this.cxt.lineWidth1 = 5; //<2F><><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD>
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var user = new WebUser();
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console.log(user.Name);
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if (user.Name == "<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>") {
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this.cxt.lineWidth1 = 2; //<2F><><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD>
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$("#select-font-size").val("2");
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}
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this.w = this.canvas.width; //ȡ<><C8A1><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD>
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this.h = this.canvas.height; //ȡ<><C8A1><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD>
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this.touch = ("createTouch" in document); //<2F>ж<EFBFBD><D0B6>Ƿ<EFBFBD>Ϊ<EFBFBD>ֳ<EFBFBD><D6B3>豸
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this.StartEvent = this.touch ? "touchstart" : "mousedown"; //֧<>ִ<EFBFBD><D6B4><EFBFBD>ʽʹ<CABD><CAB9><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD>
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this.MoveEvent = this.touch ? "touchmove" : "mousemove";
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this.EndEvent = this.touch ? "touchend" : "mouseup";
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this._resetCanvas();
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// Set up mouse events
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this.$canvas.on('mousedown touchstart', $.proxy(function (e) {
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//var touch = this.touch ? e.touches[0] : e;
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƥ<EFBFBD><C6A4>
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var skno1 = $('#clr').attr('val');
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var xPos, yPos, rect;
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rect = this.canvas.getBoundingClientRect();
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var event = e;
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if (event.type.indexOf('touch') !== -1) { // event.constructor === TouchEvent
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xPos = event.touches[0].clientX - rect.left;
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yPos = event.touches[0].clientY - rect.top;
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}
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// Mouse event
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else {
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xPos = event.clientX - rect.left;
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yPos = event.clientY - rect.top;
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}
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var _x = xPos; //<2F><><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><DABB><EFBFBD><EFBFBD>ϵ<EFBFBD>x<EFBFBD><78><EFBFBD>꣬<EFBFBD>Ի<EFBFBD><D4BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͻ<EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>
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var _y = yPos; //<2F><><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><DABB><EFBFBD><EFBFBD>ϵ<EFBFBD>y<EFBFBD><79><EFBFBD>꣬<EFBFBD>Ի<EFBFBD><D4BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͻ<EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>
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if (skno1 == 1) {
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this.resetEraser(_x, _y);
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} else {
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this.cxt.strokeStyle = "#000000";
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this.cxt.lineWidth = this.cxt.lineWidth1;
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/*
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this.drawing = true;
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this.lastPos = this.currentPos = this._getPosition(e);
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*/
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this.movePoint(_x, _y); //<2F><>¼<EFBFBD><C2BC><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
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this.drawPoint(); //<2F><><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
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}
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this.lock = true;
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}, this));
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this.$canvas.on('mousemove touchmove', $.proxy(function (e) {
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//var touch = this.touch ? e.touches[0] : e;
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var skno1 = $('#clr').attr('val');
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if (this.lock) { //t.lockΪtrue<75><65>ִ<EFBFBD><D6B4>
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var xPos, yPos, rect;
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rect = this.canvas.getBoundingClientRect();
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var event = e;
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if (event.type.indexOf('touch') !== -1) { // event.constructor === TouchEvent
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xPos = event.touches[0].clientX - rect.left;
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yPos = event.touches[0].clientY - rect.top;
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}
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// Mouse event
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else {
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xPos = event.clientX - rect.left;
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yPos = event.clientY - rect.top;
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}
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var _x = xPos; //<2F><><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><DABB><EFBFBD><EFBFBD>ϵ<EFBFBD>x<EFBFBD><78><EFBFBD>꣬<EFBFBD>Ի<EFBFBD><D4BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͻ<EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>
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var _y = yPos; //<2F><><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><DABB><EFBFBD><EFBFBD>ϵ<EFBFBD>y<EFBFBD><79><EFBFBD>꣬<EFBFBD>Ի<EFBFBD><D4BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͻ<EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD> {
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if (skno1 == 1) {
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this.resetEraser(_x, _y);
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} else {
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this.cxt.strokeStyle = "#000000";
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this.cxt.lineWidth = this.cxt.lineWidth1;
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/*
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this.currentPos = this._getPosition(e);
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*/
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this.movePoint(_x, _y, true); //<2F><>¼<EFBFBD><C2BC><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
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this.drawPoint(); //<2F><><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
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}
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}
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}, this));
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this.$canvas.on('mouseup touchend', $.proxy(function (e) {
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this.lock = false;
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this.x = [];
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this.y = [];
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this.clickDrag = [];
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this.drawing = false;
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// Trigger a change event
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var changedEvent = $.Event('jq.signature.changed');
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this.$element.trigger(changedEvent);
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}, this));
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// Prevent document scrolling when touching canvas
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$(document).on('mouseup touchend', $.proxy(function (e) {
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this.lock = false;
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this.x = [];
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this.y = [];
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this.clickDrag = [];
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this.drawing = false;
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// Trigger a change event
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var changedEvent = $.Event('jq.signature.changed');
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this.$element.trigger(changedEvent);
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}, this));
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$(document).on('touchstart touchmove touchend', $.proxy(function (e) {
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if (e.target === this.canvas) {
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e.preventDefault();
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}
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}, this));
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// Start drawing
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var that = this;
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(function drawLoop() {
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window.requestAnimFrame(drawLoop);
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that._renderCanvas();
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})();
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},
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// Clear the canvas
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clearCanvas: function () {
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this.canvas.width = this.canvas.width;
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this._resetCanvas();
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},
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// Get the content of the canvas as a base64 data URL
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getDataURL: function () {
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return this.canvas.toDataURL();
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},
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setfont: function () { //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С
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var fontsize = $("#select-font-size").val();
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console.log(fontsize);
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this.cxt.lineWidth1 = parseInt(fontsize);
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},
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// Get the position of the mouse/touch
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_getPosition: function (event) {
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var xPos, yPos, rect;
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rect = this.canvas.getBoundingClientRect();
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event = event.originalEvent;
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// Touch event
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if (event.type.indexOf('touch') !== -1) { // event.constructor === TouchEvent
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xPos = event.touches[0].clientX - rect.left;
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yPos = event.touches[0].clientY - rect.top;
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}
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// Mouse event
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else {
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xPos = event.clientX - rect.left;
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yPos = event.clientY - rect.top;
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}
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return {
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x: xPos,
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y: yPos
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};
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},
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movePoint: function (x, y, dragging) {
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/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD><D3B5><EFBFBD><EFBFBD>Զ<EFBFBD>Ӧ<EFBFBD><D3A6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/
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this.x.push(x);
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this.y.push(y);
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this.clickDrag.push(y);
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},
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drawPoint: function (x, y, radius) {
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for (var i = 0; i < this.x.length; i++) //ѭ<><D1AD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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{
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this.cxt.beginPath(); //context.beginPath() , <><D7BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>·<EFBFBD><C2B7>
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if (this.clickDrag[i] && i) { //<2F><><EFBFBD><EFBFBD><EFBFBD>϶<EFBFBD><CFB6><EFBFBD><EFBFBD><EFBFBD>i!=0ʱ<30><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>㿪ʼ<E3BFAA><CABC><EFBFBD>ߡ<EFBFBD>
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this.cxt.moveTo(this.x[i - 1], this.y[i - 1]); //context.moveTo(x, y) , <20>¿<EFBFBD>һ<EFBFBD><D2BB>·<EFBFBD><C2B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8>·<EFBFBD><C2B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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} else {
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this.cxt.moveTo(this.x[i] - 1, this.y[i]);
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}
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this.cxt.lineTo(this.x[i], this.y[i]); //context.lineTo(x, y) , <20><><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8><EFBFBD>ĵ<EFBFBD><C4B5><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>ֱ<EFBFBD><D6B1>·<EFBFBD><C2B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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this.cxt.closePath(); //context.closePath() , <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ·<C7B0><C2B7><EFBFBD>Ǵ<C7B4><F2BFAAB5><EFBFBD><EFBFBD>ر<EFBFBD><D8B1><EFBFBD>
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this.cxt.stroke(); //context.stroke() , <20><><EFBFBD>Ƶ<EFBFBD>ǰ·<C7B0><C2B7>
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}
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},
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resetEraser: function (_x, _y) {
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/*ʹ<><CAB9><EFBFBD><EFBFBD>Ƥ<EFBFBD><C6A4>-<2D><><EFBFBD><EFBFBD>*/
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var t = this;
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//this.cxt.lineWidth = 30;
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/*source-over Ĭ<><C4AC>,<2C>ཻ<EFBFBD><E0BDBB><EFBFBD><EFBFBD><EFBFBD>ɺ<EFBFBD><C9BA><EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD>ε<EFBFBD><CEB5><EFBFBD><EFBFBD><EFBFBD>(<28><>ɫ,<2C><><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD>)<29><><EFBFBD><EFBFBD>,ȫ<><C8AB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8>*/
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t.cxt.globalCompositeOperation = "destination-out";
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t.cxt.beginPath();
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t.cxt.arc(_x, _y, this.cxt.lineWidth1 + 6, 0, Math.PI * 2);
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t.cxt.strokeStyle = "rgba(250,250,250,0)";
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t.cxt.fill();
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t.cxt.globalCompositeOperation = "source-over"
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},
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// Render the signature to the canvas
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_renderCanvas: function () {
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if (this.drawing) {
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this.ctx.moveTo(this.lastPos.x, this.lastPos.y);
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this.ctx.lineTo(this.currentPos.x, this.currentPos.y);
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this.ctx.stroke();
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this.lastPos = this.currentPos;
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}
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},
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// Reset the canvas context
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_resetCanvas: function () {
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//this.ctx = this.canvas.getContext("2d");
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// this.ctx.strokeStyle = "#000000";
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//this.ctx.lineWidth = 5;
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},
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// Resize the canvas element
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_resizeCanvas: function () {
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var width = this.$element.outerWidth();
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this.$canvas.attr('width', width);
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this.$canvas.css('width', width + 'px');
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}
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};
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/*
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* Plugin wrapper and initialization
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*/
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$.fn[pluginName] = function (options) {
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var args = arguments;
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if (options === undefined || typeof options === 'object') {
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return this.each(function () {
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if (!$.data(this, 'plugin_' + pluginName)) {
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$.data(this, 'plugin_' + pluginName, new Signature(this, options));
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}
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});
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} else if (typeof options === 'string' && options[0] !== '_' && options !== 'init') {
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var returns;
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this.each(function () {
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var instance = $.data(this, 'plugin_' + pluginName);
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if (instance instanceof Signature && typeof instance[options] === 'function') {
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returns = instance[options].apply(instance, Array.prototype.slice.call(args, 1));
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}
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if (options === 'destroy') {
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$.data(this, 'plugin_' + pluginName, null);
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}
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});
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return returns !== undefined ? returns : this;
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}
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};
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})(window, document, jQuery); |