+ getAutoCreate : function()
+ {
+ var cls = 'roo-signature';
+
+ if(this.cls){
+ cls += ' ' + this.cls;
+ }
+
+ var cfg = {
+ tag: 'div',
+ cls: cls,
+ cn: [
+ {
+ tag: 'div',
+ cls: 'roo-signature-body',
+ cn: [
+ {
+ tag: 'canvas',
+ cls: 'roo-signature-body-canvas'
+ }
+ ]
+ }
+ ]
+ };
+
+ return cfg;
+ },
+
+ initEvents: function()
+ {
+ Roo.bootstrap.BezierSignature.superclass.initEvents.call(this);
+
+ var canvas = this.canvasEl();
+
+ canvas.dom.style.touchAction = 'none';
+ canvas.dom.style.msTouchAction = 'none';
+
+ this._mouseButtonDown = false;
+ canvas.on('mousedown', this._handleMouseDown, this);
+ canvas.on('mousemove', this._handleMouseMove, this);
+ // catching mouseup for whole doc... any better way to catch it
+ Roo.select('html').first().on('mouseup', this._handleMouseUp, this);
+
+ if (window.ontouchstart) {
+ canvas.on('touchstart', this._handleTouchStart, this);
+ canvas.on('touchmove', this._handleTouchMove, this);
+ canvas.on('touchend', this._handleTouchEnd, this);
+ }
+
+ // this.canvas.on('click', this.onClick, this);
+ },
+
+ _handleMouseDown: function(e)
+ {
+ if (e.browserEvent.which === 1) {
+ this._mouseButtonDown = true;
+ this.strokeBegin(e);
+ }
+ },
+
+ _handleMouseMove: function (e)
+ {
+ if (this._mouseButtonDown) {
+ this.strokeMoveUpdate(e);
+ }
+ },
+
+ _handleMouseUp: function (e)
+ {
+ if (e.browserEvent.which === 1 && this._mouseButtonDown) {
+ this._mouseButtonDown = false;
+ this.strokeEnd(e);
+ }
+ },
+
+ reset: function () {
+ this._lastPoints = [];
+ this._lastVelocity = 0;
+ this._lastWidth = (this.minWidth + this.maxWidth) / 2;
+ this.canvasElCtx().fillStyle = this.penColor;
+ },
+
+ strokeMoveUpdate: function(e)
+ {
+ this.strokeUpdate(e);
+
+ if (this.throttle) {
+ this.throttle(this.strokeUpdate, this.throttle);
+ }
+ else {
+ this.strokeUpdate(e);
+ }
+ },
+
+ strokeBegin: function(e)
+ {
+ var newPointGroup = {
+ color: this.penColor,
+ points: []
+ };
+
+ if (typeof this.onBegin === 'function') {
+ this.onBegin(e);
+ }
+
+ this._data.push(newPointGroup);
+ this.reset();
+ this.strokeUpdate(e);
+ },
+
+ strokeUpdate: function(e)
+ {
+ var rect = this.canvasEl().dom.getBoundingClientRect();
+ var point = new this.Point(e.browserEvent.clientX - rect.left, e.browserEvent.clientY - rect.top, new Date().getTime());
+ var lastPointGroup = this._data[this._data.length - 1];
+ var lastPoints = lastPointGroup.points;
+ var lastPoint = lastPoints.length > 0 && lastPoints[lastPoints.length - 1];
+ var isLastPointTooClose = lastPoint
+ ? point.distanceTo(lastPoint) <= this.minDistance
+ : 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.velocityFilterWeight * endPoint.velocityFrom(startPoint) +
+ (1 - this.velocityFilterWeight) * this._lastVelocity;
+
+ var newWidth = Math.max(this.maxWidth / (velocity + 1), this.minWidth);
+ 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.dotSize === 'function' ? this.dotSize() : this.dotSize;
+ 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._isEmpty = false;
+ },
+
+ isValid: function()
+ {
+ // form cannot detect...
+ },
+
+ canvasEl: function()
+ {
+ return this.el.select('canvas',true).first();
+ },
+
+ canvasElCtx: function()
+ {
+ return this.el.select('canvas',true).first().dom.getContext('2d');
+ },
+
+ // Bezier Point Constructor
projects / roojs1 / commitdiff