+ 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