+});/**
+ * @class Roo.bootstrap.BezierSignature
+ * @extends Roo.bootstrap.Component
+ * Bootstrap BezierSignature class
+ * This script refer to:
+ * Title: Signature Pad
+ * Author: szimek
+ * Availability: https://github.com/szimek/signature_pad
+ *
+ * @constructor
+ * Create a new BezierSignature
+ * @param {Object} config The config object
+ */
+
+Roo.bootstrap.BezierSignature = function(config){
+ Roo.bootstrap.BezierSignature.superclass.constructor.call(this, config);
+ this.addEvents({
+ "resize" : true
+ });
+};
+
+Roo.extend(Roo.bootstrap.BezierSignature, Roo.bootstrap.Component,
+{
+
+ curve_data: [],
+
+ is_empty: true,
+
+ mouse_btn_down: true,
+
+ /**
+ * @cfg {int} canvas height
+ */
+ canvas_height: '200px',
+
+ /**
+ * @cfg {float|function} Radius of a single dot.
+ */
+ dot_size: false,
+
+ /**
+ * @cfg {float} Minimum width of a line. Defaults to 0.5.
+ */
+ min_width: 0.5,
+
+ /**
+ * @cfg {float} Maximum width of a line. Defaults to 2.5.
+ */
+ max_width: 2.5,
+
+ /**
+ * @cfg {integer} Draw the next point at most once per every x milliseconds. Set it to 0 to turn off throttling. Defaults to 16.
+ */
+ throttle: 16,
+
+ /**
+ * @cfg {integer} Add the next point only if the previous one is farther than x pixels. Defaults to 5.
+ */
+ min_distance: 5,
+
+ /**
+ * @cfg {string} Color used to clear the background. Can be any color format accepted by context.fillStyle. Defaults to "rgba(0,0,0,0)" (transparent black). Use a non-transparent color e.g. "rgb(255,255,255)" (opaque white) if you'd like to save signatures as JPEG images.
+ */
+ bg_color: 'rgba(0, 0, 0, 0)',
+
+ /**
+ * @cfg {string} Color used to draw the lines. Can be any color format accepted by context.fillStyle. Defaults to "black".
+ */
+ dot_color: 'black',
+
+ /**
+ * @cfg {float} Weight used to modify new velocity based on the previous velocity. Defaults to 0.7.
+ */
+ velocity_filter_weight: 0.7,
+
+ /**
+ * @cfg {function} Callback when stroke begin.
+ */
+ onBegin: false,
+
+ /**
+ * @cfg {function} Callback when stroke end.
+ */
+ onEnd: false,
+
+ getAutoCreate : function()
+ {
+ var cls = 'roo-signature column';
+
+ if(this.cls){
+ cls += ' ' + this.cls;
+ }
+
+ var col_sizes = [
+ 'lg',
+ 'md',
+ 'sm',
+ 'xs'
+ ];
+
+ for(var i = 0; i < col_sizes.length; i++) {
+ if(this[col_sizes[i]]) {
+ cls += " col-"+col_sizes[i]+"-"+this[col_sizes[i]];
+ }
+ }
+
+ var cfg = {
+ tag: 'div',
+ cls: cls,
+ cn: [
+ {
+ tag: 'div',
+ cls: 'roo-signature-body',
+ cn: [
+ {
+ tag: 'canvas',
+ cls: 'roo-signature-body-canvas',
+ height: this.canvas_height,
+ width: this.canvas_width
+ }
+ ]
+ },
+ {
+ tag: 'input',
+ type: 'file',
+ style: 'display: none'
+ }
+ ]
+ };
+
+ return cfg;
+ },
+
+ initEvents: function()
+ {
+ Roo.bootstrap.BezierSignature.superclass.initEvents.call(this);
+
+ var canvas = this.canvasEl();
+
+ // mouse && touch event swapping...
+ canvas.dom.style.touchAction = 'none';
+ canvas.dom.style.msTouchAction = 'none';
+
+ this.mouse_btn_down = false;
+ canvas.on('mousedown', this._handleMouseDown, this);
+ canvas.on('mousemove', this._handleMouseMove, this);
+ Roo.select('html').first().on('mouseup', this._handleMouseUp, this);
+
+ if (window.PointerEvent) {
+ canvas.on('pointerdown', this._handleMouseDown, this);
+ canvas.on('pointermove', this._handleMouseMove, this);
+ Roo.select('html').first().on('pointerup', this._handleMouseUp, this);
+ }
+
+ if ('ontouchstart' in window) {
+ canvas.on('touchstart', this._handleTouchStart, this);
+ canvas.on('touchmove', this._handleTouchMove, this);
+ canvas.on('touchend', this._handleTouchEnd, this);
+ }
+
+ Roo.EventManager.onWindowResize(this.resize, this, true);
+
+ // file input event
+ this.fileEl().on('change', this.uploadImage, this);
+
+ this.clear();
+
+ this.resize();
+ },
+
+ resize: function(){
+
+ var canvas = this.canvasEl().dom;
+ var ctx = this.canvasElCtx();
+ var img_data = false;
+
+ if(canvas.width > 0) {
+ var img_data = ctx.getImageData(0, 0, canvas.width, canvas.height);
+ }
+ // setting canvas width will clean img data
+ canvas.width = 0;
+
+ var style = window.getComputedStyle ?
+ getComputedStyle(this.el.dom, null) : this.el.dom.currentStyle;
+
+ var padding_left = parseInt(style.paddingLeft) || 0;
+ var padding_right = parseInt(style.paddingRight) || 0;
+
+ canvas.width = this.el.dom.clientWidth - padding_left - padding_right;
+
+ if(img_data) {
+ ctx.putImageData(img_data, 0, 0);
+ }
+ },
+
+ _handleMouseDown: function(e)
+ {
+ if (e.browserEvent.which === 1) {
+ this.mouse_btn_down = true;
+ this.strokeBegin(e);
+ }
+ },
+
+ _handleMouseMove: function (e)
+ {
+ if (this.mouse_btn_down) {
+ this.strokeMoveUpdate(e);
+ }
+ },
+
+ _handleMouseUp: function (e)
+ {
+ if (e.browserEvent.which === 1 && this.mouse_btn_down) {
+ this.mouse_btn_down = false;
+ this.strokeEnd(e);
+ }
+ },
+
+ _handleTouchStart: function (e) {
+
+ e.preventDefault();
+ if (e.browserEvent.targetTouches.length === 1) {
+ // var touch = e.browserEvent.changedTouches[0];
+ // this.strokeBegin(touch);
+
+ this.strokeBegin(e); // assume e catching the correct xy...
+ }
+ },
+
+ _handleTouchMove: function (e) {
+ e.preventDefault();
+ // var touch = event.targetTouches[0];
+ // _this._strokeMoveUpdate(touch);
+ this.strokeMoveUpdate(e);
+ },
+
+ _handleTouchEnd: function (e) {
+ var wasCanvasTouched = e.target === this.canvasEl().dom;
+ if (wasCanvasTouched) {
+ e.preventDefault();
+ // var touch = event.changedTouches[0];
+ // _this._strokeEnd(touch);
+ this.strokeEnd(e);
+ }
+ },
+
+ reset: function () {
+ this._lastPoints = [];
+ this._lastVelocity = 0;
+ this._lastWidth = (this.min_width + this.max_width) / 2;
+ this.canvasElCtx().fillStyle = this.dot_color;
+ },
+
+ strokeMoveUpdate: function(e)
+ {
+ this.strokeUpdate(e);
+
+ if (this.throttle) {
+ this.throttleStroke(this.strokeUpdate, this.throttle);
+ }
+ else {
+ this.strokeUpdate(e);
+ }
+ },
+
+ strokeBegin: function(e)
+ {
+ var newPointGroup = {
+ color: this.dot_color,
+ points: []
+ };
+
+ if (typeof this.onBegin === 'function') {
+ this.onBegin(e);
+ }
+
+ this.curve_data.push(newPointGroup);
+ this.reset();
+ this.strokeUpdate(e);
+ },
+
+ strokeUpdate: function(e)
+ {
+ var rect = this.canvasEl().dom.getBoundingClientRect();
+ var point = new this.Point(e.xy[0] - rect.left, e.xy[1] - rect.top, new Date().getTime());
+ var lastPointGroup = this.curve_data[this.curve_data.length - 1];
+ var lastPoints = lastPointGroup.points;
+ var lastPoint = lastPoints.length > 0 && lastPoints[lastPoints.length - 1];
+ var isLastPointTooClose = lastPoint
+ ? point.distanceTo(lastPoint) <= this.min_distance
+ : false;
+ var color = lastPointGroup.color;
+ if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
+ var curve = this.addPoint(point);
+ if (!lastPoint) {
+ this.drawDot({color: color, point: point});
+ }
+ else if (curve) {
+ this.drawCurve({color: color, curve: curve});
+ }
+ lastPoints.push({
+ time: point.time,
+ x: point.x,
+ y: point.y
+ });
+ }
+ },
+
+ strokeEnd: function(e)
+ {
+ this.strokeUpdate(e);
+ if (typeof this.onEnd === 'function') {
+ this.onEnd(e);
+ }
+ },
+
+ addPoint: function (point) {
+ var _lastPoints = this._lastPoints;
+ _lastPoints.push(point);
+ if (_lastPoints.length > 2) {
+ if (_lastPoints.length === 3) {
+ _lastPoints.unshift(_lastPoints[0]);
+ }
+ var widths = this.calculateCurveWidths(_lastPoints[1], _lastPoints[2]);
+ var curve = this.Bezier.fromPoints(_lastPoints, widths, this);
+ _lastPoints.shift();
+ return curve;
+ }
+ return null;
+ },
+
+ calculateCurveWidths: function (startPoint, endPoint) {
+ var velocity = this.velocity_filter_weight * endPoint.velocityFrom(startPoint) +
+ (1 - this.velocity_filter_weight) * this._lastVelocity;
+
+ var newWidth = Math.max(this.max_width / (velocity + 1), this.min_width);
+ var widths = {
+ end: newWidth,
+ start: this._lastWidth
+ };
+
+ this._lastVelocity = velocity;
+ this._lastWidth = newWidth;
+ return widths;
+ },
+
+ drawDot: function (_a) {
+ var color = _a.color, point = _a.point;
+ var ctx = this.canvasElCtx();
+ var width = typeof this.dot_size === 'function' ? this.dot_size() : this.dot_size;
+ ctx.beginPath();
+ this.drawCurveSegment(point.x, point.y, width);
+ ctx.closePath();
+ ctx.fillStyle = color;
+ ctx.fill();
+ },
+
+ drawCurve: function (_a) {
+ var color = _a.color, curve = _a.curve;
+ var ctx = this.canvasElCtx();
+ var widthDelta = curve.endWidth - curve.startWidth;
+ var drawSteps = Math.floor(curve.length()) * 2;
+ ctx.beginPath();
+ ctx.fillStyle = color;
+ for (var i = 0; i < drawSteps; i += 1) {
+ var t = i / drawSteps;
+ var tt = t * t;
+ var ttt = tt * t;
+ var u = 1 - t;
+ var uu = u * u;
+ var uuu = uu * u;
+ var x = uuu * curve.startPoint.x;
+ x += 3 * uu * t * curve.control1.x;
+ x += 3 * u * tt * curve.control2.x;
+ x += ttt * curve.endPoint.x;
+ var y = uuu * curve.startPoint.y;
+ y += 3 * uu * t * curve.control1.y;
+ y += 3 * u * tt * curve.control2.y;
+ y += ttt * curve.endPoint.y;
+ var width = curve.startWidth + ttt * widthDelta;
+ this.drawCurveSegment(x, y, width);
+ }
+ ctx.closePath();
+ ctx.fill();
+ },
+
+ drawCurveSegment: function (x, y, width) {
+ var ctx = this.canvasElCtx();
+ ctx.moveTo(x, y);
+ ctx.arc(x, y, width, 0, 2 * Math.PI, false);
+ this.is_empty = false;
+ },
+
+ clear: function()
+ {
+ var ctx = this.canvasElCtx();
+ var canvas = this.canvasEl().dom;
+ ctx.fillStyle = this.bg_color;
+ ctx.clearRect(0, 0, canvas.width, canvas.height);
+ ctx.fillRect(0, 0, canvas.width, canvas.height);
+ this.curve_data = [];
+ this.reset();
+ this.is_empty = true;
+ },
+
+ fileEl: function()
+ {
+ return this.el.select('input',true).first();
+ },
+
+ canvasEl: function()
+ {
+ return this.el.select('canvas',true).first();
+ },
+
+ canvasElCtx: function()
+ {
+ return this.el.select('canvas',true).first().dom.getContext('2d');
+ },
+
+ getImage: function(type)
+ {
+ if(this.is_empty) {
+ return false;
+ }
+
+ // encryption ?
+ return this.canvasEl().dom.toDataURL('image/'+type, 1);
+ },
+
+ drawFromImage: function(img_src)
+ {
+ var img = new Image();
+
+ img.onload = function(){
+ this.canvasElCtx().drawImage(img, 0, 0);
+ }.bind(this);
+
+ img.src = img_src;
+
+ this.is_empty = false;
+ },
+
+ selectImage: function()
+ {
+ this.fileEl().dom.click();
+ },
+
+ uploadImage: function(e)
+ {
+ var reader = new FileReader();
+
+ reader.onload = function(e){
+ var img = new Image();
+ img.onload = function(){
+ this.reset();
+ this.canvasElCtx().drawImage(img, 0, 0);
+ }.bind(this);
+ img.src = e.target.result;
+ }.bind(this);
+
+ reader.readAsDataURL(e.target.files[0]);
+ },
+
+ // Bezier Point Constructor
+ Point: (function () {
+ function Point(x, y, time) {
+ this.x = x;
+ this.y = y;
+ this.time = time || Date.now();
+ }
+ Point.prototype.distanceTo = function (start) {
+ return Math.sqrt(Math.pow(this.x - start.x, 2) + Math.pow(this.y - start.y, 2));
+ };
+ Point.prototype.equals = function (other) {
+ return this.x === other.x && this.y === other.y && this.time === other.time;
+ };
+ Point.prototype.velocityFrom = function (start) {
+ return this.time !== start.time
+ ? this.distanceTo(start) / (this.time - start.time)
+ : 0;
+ };
+ return Point;
+ }()),
+
+
+ // Bezier Constructor
+ Bezier: (function () {
+ function Bezier(startPoint, control2, control1, endPoint, startWidth, endWidth) {
+ this.startPoint = startPoint;
+ this.control2 = control2;
+ this.control1 = control1;
+ this.endPoint = endPoint;
+ this.startWidth = startWidth;
+ this.endWidth = endWidth;
+ }
+ Bezier.fromPoints = function (points, widths, scope) {
+ var c2 = this.calculateControlPoints(points[0], points[1], points[2], scope).c2;
+ var c3 = this.calculateControlPoints(points[1], points[2], points[3], scope).c1;
+ return new Bezier(points[1], c2, c3, points[2], widths.start, widths.end);
+ };
+ Bezier.calculateControlPoints = function (s1, s2, s3, scope) {
+ var dx1 = s1.x - s2.x;
+ var dy1 = s1.y - s2.y;
+ var dx2 = s2.x - s3.x;
+ var dy2 = s2.y - s3.y;
+ var m1 = { x: (s1.x + s2.x) / 2.0, y: (s1.y + s2.y) / 2.0 };
+ var m2 = { x: (s2.x + s3.x) / 2.0, y: (s2.y + s3.y) / 2.0 };
+ var l1 = Math.sqrt(dx1 * dx1 + dy1 * dy1);
+ var l2 = Math.sqrt(dx2 * dx2 + dy2 * dy2);
+ var dxm = m1.x - m2.x;
+ var dym = m1.y - m2.y;
+ var k = l2 / (l1 + l2);
+ var cm = { x: m2.x + dxm * k, y: m2.y + dym * k };
+ var tx = s2.x - cm.x;
+ var ty = s2.y - cm.y;
+ return {
+ c1: new scope.Point(m1.x + tx, m1.y + ty),
+ c2: new scope.Point(m2.x + tx, m2.y + ty)
+ };
+ };
+ Bezier.prototype.length = function () {
+ var steps = 10;
+ var length = 0;
+ var px;
+ var py;
+ for (var i = 0; i <= steps; i += 1) {
+ var t = i / steps;
+ var cx = this.point(t, this.startPoint.x, this.control1.x, this.control2.x, this.endPoint.x);
+ var cy = this.point(t, this.startPoint.y, this.control1.y, this.control2.y, this.endPoint.y);
+ if (i > 0) {
+ var xdiff = cx - px;
+ var ydiff = cy - py;
+ length += Math.sqrt(xdiff * xdiff + ydiff * ydiff);
+ }
+ px = cx;
+ py = cy;
+ }
+ return length;
+ };
+ Bezier.prototype.point = function (t, start, c1, c2, end) {
+ return (start * (1.0 - t) * (1.0 - t) * (1.0 - t))
+ + (3.0 * c1 * (1.0 - t) * (1.0 - t) * t)
+ + (3.0 * c2 * (1.0 - t) * t * t)
+ + (end * t * t * t);
+ };
+ return Bezier;
+ }()),
+
+ throttleStroke: function(fn, wait) {
+ if (wait === void 0) { wait = 250; }
+ var previous = 0;
+ var timeout = null;
+ var result;
+ var storedContext;
+ var storedArgs;
+ var later = function () {
+ previous = Date.now();
+ timeout = null;
+ result = fn.apply(storedContext, storedArgs);
+ if (!timeout) {
+ storedContext = null;
+ storedArgs = [];
+ }
+ };
+ return function wrapper() {
+ var args = [];
+ for (var _i = 0; _i < arguments.length; _i++) {
+ args[_i] = arguments[_i];
+ }
+ var now = Date.now();
+ var remaining = wait - (now - previous);
+ storedContext = this;
+ storedArgs = args;
+ if (remaining <= 0 || remaining > wait) {
+ if (timeout) {
+ clearTimeout(timeout);
+ timeout = null;
+ }
+ previous = now;
+ result = fn.apply(storedContext, storedArgs);
+ if (!timeout) {
+ storedContext = null;
+ storedArgs = [];
+ }
+ }
+ else if (!timeout) {
+ timeout = window.setTimeout(later, remaining);
+ }
+ return result;
+ };
+ }
+
+});
+
+
+
+
\ No newline at end of file