From 9d73451d70f4d3df31d85d9ec95d16b676dfbc3b Mon Sep 17 00:00:00 2001
From: "john@roojs.com" <john@roojs.com>
Date: Fri, 28 Dec 2018 11:41:52 +0800
Subject: [PATCH] FIX: bezier resizing img lost

---
 Roo/bootstrap/BezierSignature.js | 11 +++++++-
 roojs-bootstrap-debug.js         | 11 +++++++-
 roojs-bootstrap.js               | 45 ++++++++++++++++----------------
 3 files changed, 43 insertions(+), 24 deletions(-)

diff --git a/Roo/bootstrap/BezierSignature.js b/Roo/bootstrap/BezierSignature.js
index 2dcd4fea17..ae7de0f3d3 100644
--- a/Roo/bootstrap/BezierSignature.js
+++ b/Roo/bootstrap/BezierSignature.js
@@ -157,6 +157,13 @@ Roo.extend(Roo.bootstrap.BezierSignature, Roo.bootstrap.Component,  {
     },
     
     resize: function(){
+        var canvas = this.canvasEl().dom;
+        var ctx = this.canvasElCtx();
+        
+        var img_data = ctx.getImageData(0, 0, canvas.width, canvas.height);
+        
+        // setting canvas width will clean img data inside
+        canvas.width = 0;
         
         var style = window.getComputedStyle ? 
             getComputedStyle(this.el.dom, null) : this.el.dom.currentStyle;
@@ -164,7 +171,9 @@ Roo.extend(Roo.bootstrap.BezierSignature, Roo.bootstrap.Component,  {
         var padding_left = parseInt(style.paddingLeft) || 0;
         var padding_right = parseInt(style.paddingRight) || 0;
         
-        this.canvasEl().dom.width = this.el.dom.clientWidth - padding_left - padding_right;
+        canvas.width = this.el.dom.clientWidth - padding_left - padding_right;
+        
+        ctx.putImageData(img_data, 0, 0);
     },
     
     _handleMouseDown: function(e)
diff --git a/roojs-bootstrap-debug.js b/roojs-bootstrap-debug.js
index 916b94c800..980c3ce65c 100644
--- a/roojs-bootstrap-debug.js
+++ b/roojs-bootstrap-debug.js
@@ -41658,6 +41658,13 @@ Roo.extend(Roo.bootstrap.BezierSignature, Roo.bootstrap.Component,  {
     },
     
     resize: function(){
+        var canvas = this.canvasEl().dom;
+        var ctx = this.canvasElCtx();
+        
+        var img_data = ctx.getImageData(0, 0, canvas.width, canvas.height);
+        
+        // setting canvas width will clean img data inside
+        canvas.width = 0;
         
         var style = window.getComputedStyle ? 
             getComputedStyle(this.el.dom, null) : this.el.dom.currentStyle;
@@ -41665,7 +41672,9 @@ Roo.extend(Roo.bootstrap.BezierSignature, Roo.bootstrap.Component,  {
         var padding_left = parseInt(style.paddingLeft) || 0;
         var padding_right = parseInt(style.paddingRight) || 0;
         
-        this.canvasEl().dom.width = this.el.dom.clientWidth - padding_left - padding_right;
+        canvas.width = this.el.dom.clientWidth - padding_left - padding_right;
+        
+        ctx.putImageData(img_data, 0, 0);
     },
     
     _handleMouseDown: function(e)
diff --git a/roojs-bootstrap.js b/roojs-bootstrap.js
index 1663693cd7..a3dafa4642 100644
--- a/roojs-bootstrap.js
+++ b/roojs-bootstrap.js
@@ -1735,25 +1735,26 @@ Roo.bootstrap.BezierSignature=function(A){Roo.bootstrap.BezierSignature.supercla
 if(this.cls){A+=' '+this.cls;}var B=['lg','md','sm','xs'];for(var i=0;i<B.length;i++){if(this[B[i]]){A+=" col-"+B[i]+"-"+this[B[i]];}}var C={tag:'div',cls:A,cn:[{tag:'div',cls:'roo-signature-body',cn:[{tag:'canvas',cls:'roo-signature-body-canvas',height:this.canvas_height,width:this.canvas_width}
 ]}]};return C;},initEvents:function(){Roo.bootstrap.BezierSignature.superclass.initEvents.call(this);var A=this.canvasEl();A.dom.style.touchAction='none';A.dom.style.msTouchAction='none';this.mouse_btn_down=false;A.on('mousedown',this._handleMouseDown,this);
 A.on('mousemove',this._handleMouseMove,this);Roo.select('html').first().on('mouseup',this._handleMouseUp,this);if(window.ontouchstart){A.on('touchstart',this._handleTouchStart,this);A.on('touchmove',this._handleTouchMove,this);A.on('touchend',this._handleTouchEnd,this);
-}Roo.EventManager.onWindowResize(this.resize,this,true);this.clear();this.resize();},resize:function(){var A=window.getComputedStyle?getComputedStyle(this.el.dom,null):this.el.dom.currentStyle;var B=parseInt(A.paddingLeft)||0;var C=parseInt(A.paddingRight)||0;
-this.canvasEl().dom.width=this.el.dom.clientWidth-B-C;},_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){this.strokeBegin(e);}},_handleTouchMove:function(e){e.preventDefault();this._strokeMoveUpdate(e);},_handleTouchEnd:function(e){var A=e.target===this.canvasEl().dom;
-if(A){e.preventDefault();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.throttle(this.strokeUpdate,this.throttle);
-}else{this.strokeUpdate(e);}},strokeBegin:function(e){var A={color:this.dot_color,points:[]};if(typeof this.onBegin==='function'){this.onBegin(e);}this.curve_data.push(A);this.reset();this.strokeUpdate(e);},strokeUpdate:function(e){var A=this.canvasEl().dom.getBoundingClientRect();
-var B=new this.Point(e.xy[0]-A.left,e.xy[1]-A.top,new Date().getTime());var C=this.curve_data[this.curve_data.length-1];var D=C.points;var E=D.length>0&&D[D.length-1];var F=E?B.distanceTo(E)<=this.min_distance:false;var G=C.color;if(!E||!(E&&F)){var H=this.addPoint(B);
-if(!E){this.drawDot({color:G,point:B});}else if(H){this.drawCurve({color:G,curve:H});}D.push({time:B.time,x:B.x,y:B.y});}},strokeEnd:function(e){this.strokeUpdate(e);if(typeof this.onEnd==='function'){this.onEnd(e);}},addPoint:function(A){var B=this._lastPoints;
-B.push(A);if(B.length>2){if(B.length===3){B.unshift(B[0]);}var C=this.calculateCurveWidths(B[1],B[2]);var D=this.Bezier.fromPoints(B,C,this);B.shift();return D;}return null;},calculateCurveWidths:function(A,B){var C=this.velocity_filter_weight*B.velocityFrom(A)+(1-this.velocity_filter_weight)*this._lastVelocity;
-var D=Math.max(this.max_width/(C+1),this.min_width);var E={end:D,start:this._lastWidth};this._lastVelocity=C;this._lastWidth=D;return E;},drawDot:function(_a){var A=_a.color,B=_a.point;var C=this.canvasElCtx();var D=typeof this.dot_size==='function'?this.dot_size():this.dot_size;
-C.beginPath();this.drawCurveSegment(B.x,B.y,D);C.closePath();C.fillStyle=A;C.fill();},drawCurve:function(_a){var A=_a.color,B=_a.curve;var C=this.canvasElCtx();var D=B.endWidth-B.startWidth;var E=Math.floor(B.length())*2;C.beginPath();C.fillStyle=A;for(var i=0;
-i<E;i+=1){var t=i/E;var tt=t*t;var F=tt*t;var u=1-t;var uu=u*u;var G=uu*u;var x=G*B.startPoint.x;x+=3*uu*t*B.control1.x;x+=3*u*tt*B.control2.x;x+=F*B.endPoint.x;var y=G*B.startPoint.y;y+=3*uu*t*B.control1.y;y+=3*u*tt*B.control2.y;y+=F*B.endPoint.y;var H=B.startWidth+F*D;
-this.drawCurveSegment(x,y,H);}C.closePath();C.fill();},drawCurveSegment:function(x,y,A){var B=this.canvasElCtx();B.moveTo(x,y);B.arc(x,y,A,0,2*Math.PI,false);this.is_empty=false;},clear:function(){var A=this.canvasElCtx();var B=this.canvasEl().dom;A.fillStyle=this.bg_color;
-A.clearRect(0,0,B.width,B.height);A.fillRect(0,0,B.width,B.height);this.curve_data=[];this.reset();this.is_empty=true;},canvasEl:function(){return this.el.select('canvas',true).first();},canvasElCtx:function(){return this.el.select('canvas',true).first().dom.getContext('2d');
-},getImage:function(A){if(this.is_empty){return false;}return this.canvasEl().dom.toDataURL('image/'+A,false);},drawFromImage:function(A){var B=new Image();B.src=A;this.canvasElCtx().drawImage(B,0,0);},Point:(function(){function Point(x,y,A){this.x=x;this.y=y;
-this.time=A||Date.now();}Point.prototype.distanceTo=function(A){return Math.sqrt(Math.pow(this.x-A.x,2)+Math.pow(this.y-A.y,2));};Point.prototype.equals=function(A){return this.x===A.x&&this.y===A.y&&this.time===A.time;};Point.prototype.velocityFrom=function(A){return this.time!==A.time?this.distanceTo(A)/(this.time-A.time):0;
-};return Point;}()),Bezier:(function(){function Bezier(A,B,C,D,E,F){this.startPoint=A;this.control2=B;this.control1=C;this.endPoint=D;this.startWidth=E;this.endWidth=F;}Bezier.fromPoints=function(A,B,C){var c2=this.calculateControlPoints(A[0],A[1],A[2],C).c2;
-var c3=this.calculateControlPoints(A[1],A[2],A[3],C).c1;return new Bezier(A[1],c2,c3,A[2],B.start,B.end);};Bezier.calculateControlPoints=function(s1,s2,s3,A){var B=s1.x-s2.x;var C=s1.y-s2.y;var D=s2.x-s3.x;var E=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(B*B+C*C);var l2=Math.sqrt(D*D+E*E);var F=m1.x-m2.x;var G=m1.y-m2.y;var k=l2/(l1+l2);var cm={x:m2.x+F*k,y:m2.y+G*k};var tx=s2.x-cm.x;var ty=s2.y-cm.y;return {c1:new A.Point(m1.x+tx,m1.y+ty),c2:new A.Point(m2.x+tx,m2.y+ty)}
-;};Bezier.prototype.length=function(){var A=10;var B=0;var px;var py;for(var i=0;i<=A;i+=1){var t=i/A;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 C=cx-px;var D=cy-py;B+=Math.sqrt(C*C+D*D);}px=cx;py=cy;}return B;};Bezier.prototype.point=function(t,A,c1,c2,B){return (A*(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)+(B*t*t*t);};return Bezier;}()),throttle:function(fn,A){if(A===void 0){A=250;
-}var B=0;var C=null;var D;var E;var F;var G=function(){B=Date.now();C=null;D=fn.apply(E,F);if(!C){E=null;F=[];}};return function H(){var I=[];for(var _i=0;_i<arguments.length;_i++){I[_i]=arguments[_i];}var J=Date.now();var K=A-(J-B);E=this;F=I;if(K<=0||K>A){if(C){clearTimeout(C);
-C=null;}B=J;D=fn.apply(E,F);if(!C){E=null;F=[];}}else if(!C){C=window.setTimeout(G,K);}return D;};}});
+}Roo.EventManager.onWindowResize(this.resize,this,true);this.clear();this.resize();},resize:function(){var A=this.canvasEl().dom;var B=this.canvasElCtx();var C=B.getImageData(0,0,A.width,A.height);A.width=0;var D=window.getComputedStyle?getComputedStyle(this.el.dom,null):this.el.dom.currentStyle;
+var E=parseInt(D.paddingLeft)||0;var F=parseInt(D.paddingRight)||0;A.width=this.el.dom.clientWidth-E-F;B.putImageData(C,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){this.strokeBegin(e);}},_handleTouchMove:function(e){e.preventDefault();
+this._strokeMoveUpdate(e);},_handleTouchEnd:function(e){var A=e.target===this.canvasEl().dom;if(A){e.preventDefault();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.throttle(this.strokeUpdate,this.throttle);}else{this.strokeUpdate(e);}},strokeBegin:function(e){var A={color:this.dot_color,points:[]};if(typeof this.onBegin==='function'){this.onBegin(e);
+}this.curve_data.push(A);this.reset();this.strokeUpdate(e);},strokeUpdate:function(e){var A=this.canvasEl().dom.getBoundingClientRect();var B=new this.Point(e.xy[0]-A.left,e.xy[1]-A.top,new Date().getTime());var C=this.curve_data[this.curve_data.length-1];
+var D=C.points;var E=D.length>0&&D[D.length-1];var F=E?B.distanceTo(E)<=this.min_distance:false;var G=C.color;if(!E||!(E&&F)){var H=this.addPoint(B);if(!E){this.drawDot({color:G,point:B});}else if(H){this.drawCurve({color:G,curve:H});}D.push({time:B.time,x:B.x,y:B.y}
+);}},strokeEnd:function(e){this.strokeUpdate(e);if(typeof this.onEnd==='function'){this.onEnd(e);}},addPoint:function(A){var B=this._lastPoints;B.push(A);if(B.length>2){if(B.length===3){B.unshift(B[0]);}var C=this.calculateCurveWidths(B[1],B[2]);var D=this.Bezier.fromPoints(B,C,this);
+B.shift();return D;}return null;},calculateCurveWidths:function(A,B){var C=this.velocity_filter_weight*B.velocityFrom(A)+(1-this.velocity_filter_weight)*this._lastVelocity;var D=Math.max(this.max_width/(C+1),this.min_width);var E={end:D,start:this._lastWidth}
+;this._lastVelocity=C;this._lastWidth=D;return E;},drawDot:function(_a){var A=_a.color,B=_a.point;var C=this.canvasElCtx();var D=typeof this.dot_size==='function'?this.dot_size():this.dot_size;C.beginPath();this.drawCurveSegment(B.x,B.y,D);C.closePath();C.fillStyle=A;
+C.fill();},drawCurve:function(_a){var A=_a.color,B=_a.curve;var C=this.canvasElCtx();var D=B.endWidth-B.startWidth;var E=Math.floor(B.length())*2;C.beginPath();C.fillStyle=A;for(var i=0;i<E;i+=1){var t=i/E;var tt=t*t;var F=tt*t;var u=1-t;var uu=u*u;var G=uu*u;
+var x=G*B.startPoint.x;x+=3*uu*t*B.control1.x;x+=3*u*tt*B.control2.x;x+=F*B.endPoint.x;var y=G*B.startPoint.y;y+=3*uu*t*B.control1.y;y+=3*u*tt*B.control2.y;y+=F*B.endPoint.y;var H=B.startWidth+F*D;this.drawCurveSegment(x,y,H);}C.closePath();C.fill();},drawCurveSegment:function(x,y,A){var B=this.canvasElCtx();
+B.moveTo(x,y);B.arc(x,y,A,0,2*Math.PI,false);this.is_empty=false;},clear:function(){var A=this.canvasElCtx();var B=this.canvasEl().dom;A.fillStyle=this.bg_color;A.clearRect(0,0,B.width,B.height);A.fillRect(0,0,B.width,B.height);this.curve_data=[];this.reset();
+this.is_empty=true;},canvasEl:function(){return this.el.select('canvas',true).first();},canvasElCtx:function(){return this.el.select('canvas',true).first().dom.getContext('2d');},getImage:function(A){if(this.is_empty){return false;}return this.canvasEl().dom.toDataURL('image/'+A,false);
+},drawFromImage:function(A){var B=new Image();B.src=A;this.canvasElCtx().drawImage(B,0,0);},Point:(function(){function Point(x,y,A){this.x=x;this.y=y;this.time=A||Date.now();}Point.prototype.distanceTo=function(A){return Math.sqrt(Math.pow(this.x-A.x,2)+Math.pow(this.y-A.y,2));
+};Point.prototype.equals=function(A){return this.x===A.x&&this.y===A.y&&this.time===A.time;};Point.prototype.velocityFrom=function(A){return this.time!==A.time?this.distanceTo(A)/(this.time-A.time):0;};return Point;}()),Bezier:(function(){function Bezier(A,B,C,D,E,F){this.startPoint=A;
+this.control2=B;this.control1=C;this.endPoint=D;this.startWidth=E;this.endWidth=F;}Bezier.fromPoints=function(A,B,C){var c2=this.calculateControlPoints(A[0],A[1],A[2],C).c2;var c3=this.calculateControlPoints(A[1],A[2],A[3],C).c1;return new Bezier(A[1],c2,c3,A[2],B.start,B.end);
+};Bezier.calculateControlPoints=function(s1,s2,s3,A){var B=s1.x-s2.x;var C=s1.y-s2.y;var D=s2.x-s3.x;var E=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(B*B+C*C);var l2=Math.sqrt(D*D+E*E);
+var F=m1.x-m2.x;var G=m1.y-m2.y;var k=l2/(l1+l2);var cm={x:m2.x+F*k,y:m2.y+G*k};var tx=s2.x-cm.x;var ty=s2.y-cm.y;return {c1:new A.Point(m1.x+tx,m1.y+ty),c2:new A.Point(m2.x+tx,m2.y+ty)};};Bezier.prototype.length=function(){var A=10;var B=0;var px;var py;
+for(var i=0;i<=A;i+=1){var t=i/A;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 C=cx-px;var D=cy-py;B+=Math.sqrt(C*C+D*D);
+}px=cx;py=cy;}return B;};Bezier.prototype.point=function(t,A,c1,c2,B){return (A*(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)+(B*t*t*t);};return Bezier;}()),throttle:function(fn,A){if(A===void 0){A=250;}var B=0;var C=null;var D;
+var E;var F;var G=function(){B=Date.now();C=null;D=fn.apply(E,F);if(!C){E=null;F=[];}};return function H(){var I=[];for(var _i=0;_i<arguments.length;_i++){I[_i]=arguments[_i];}var J=Date.now();var K=A-(J-B);E=this;F=I;if(K<=0||K>A){if(C){clearTimeout(C);C=null;
+}B=J;D=fn.apply(E,F);if(!C){E=null;F=[];}}else if(!C){C=window.setTimeout(G,K);}return D;};}});
-- 
2.39.2