12 lines
9.5 KiB
JavaScript
12 lines
9.5 KiB
JavaScript
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/*!
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* @license
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* chartjs-plugin-zoom
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* http://chartjs.org/
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* Version: 0.7.7
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*
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* Copyright 2020 Chart.js Contributors
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* Released under the MIT license
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* https://github.com/chartjs/chartjs-plugin-zoom/blob/master/LICENSE.md
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*/
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!function(e,o){"object"==typeof exports&&"undefined"!=typeof module?module.exports=o(require("chart.js"),require("hammerjs")):"function"==typeof define&&define.amd?define(["chart.js","hammerjs"],o):(e=e||self).ChartZoom=o(e.Chart,e.Hammer)}(this,(function(e,o){"use strict";e=e&&Object.prototype.hasOwnProperty.call(e,"default")?e.default:e,o=o&&Object.prototype.hasOwnProperty.call(o,"default")?o.default:o;var t=e.helpers,n=e.Zoom=e.Zoom||{},a=n.zoomFunctions=n.zoomFunctions||{},i=n.panFunctions=n.panFunctions||{};function m(e,o){var n={};void 0!==e.options.pan&&(n.pan=e.options.pan),void 0!==e.options.zoom&&(n.zoom=e.options.zoom);var a=e.$zoom;o=a._options=t.merge({},[o,n]);var i=a._node,m=o.zoom&&o.zoom.enabled,r=o.zoom.drag;m&&!r?i.addEventListener("wheel",a._wheelHandler):i.removeEventListener("wheel",a._wheelHandler),m&&r?(i.addEventListener("mousedown",a._mouseDownHandler),i.ownerDocument.addEventListener("mouseup",a._mouseUpHandler)):(i.removeEventListener("mousedown",a._mouseDownHandler),i.removeEventListener("mousemove",a._mouseMoveHandler),i.ownerDocument.removeEventListener("mouseup",a._mouseUpHandler))}function r(e){var o=e.$zoom._originalOptions;t.each(e.scales,(function(e){o[e.id]||(o[e.id]=t.clone(e.options))})),t.each(o,(function(t,n){e.scales[n]||delete o[n]}))}function l(e,o,t){return void 0===e||("string"==typeof e?-1!==e.indexOf(o):"function"==typeof e&&-1!==e({chart:t}).indexOf(o))}function s(e,o){if(e.scaleAxes&&e.rangeMax&&!t.isNullOrUndef(e.rangeMax[e.scaleAxes])){var n=e.rangeMax[e.scaleAxes];o>n&&(o=n)}return o}function c(e,o){if(e.scaleAxes&&e.rangeMin&&!t.isNullOrUndef(e.rangeMin[e.scaleAxes])){var n=e.rangeMin[e.scaleAxes];o<n&&(o=n)}return o}function u(e,o,t,n){var a=e.max-e.min,i=a*(o-1),m=e.isHorizontal()?t.x:t.y,r=(e.getValueForPixel(m)-e.min)/a,l=i*r,u=i*(1-r);e.options.ticks.min=c(n,e.min+l),e.options.ticks.max=s(n,e.max-u)}function d(e,o,t,n){var i=a[e.type];i&&i(e,o,t,n)}function p(e,o,n,a,i,m){var s=e.chartArea;a||(a={x:(s.left+s.right)/2,y:(s.top+s.bottom)/2});var c=e.$zoom._options.zoom;if(c.enabled){r(e);var u,p="function"==typeof c.mode?c.mode({chart:e}):c.mode;u="xy"===p&&void 0!==i?i:"xy",t.each(e.scales,(function(t){t.isHorizontal()&&l(p,"x",e)&&l(u,"x",e)?(c.scaleAxes="x",d(t,o,a,c)):!t.isHorizontal()&&l(p,"y",e)&&l(u,"y",e)&&(c.scaleAxes="y",d(t,n,a,c))})),m?e.update({duration:m,easing:"easeOutQuad"}):e.update(0),"function"==typeof c.onZoom&&c.onZoom({chart:e})}}function f(e,o,n){var a,i=e.options.ticks,m=e.min,r=e.max,l=e.getValueForPixel(e.getPixelForValue(m)-o),s=e.getValueForPixel(e.getPixelForValue(r)-o),c=l=l.valueOf?l.valueOf():l,u=s=s.valueOf?s.valueOf():s;n.scaleAxes&&n.rangeMin&&!t.isNullOrUndef(n.rangeMin[n.scaleAxes])&&(c=n.rangeMin[n.scaleAxes]),n.scaleAxes&&n.rangeMax&&!t.isNullOrUndef(n.rangeMax[n.scaleAxes])&&(u=n.rangeMax[n.scaleAxes]),l>=c&&s<=u?(i.min=l,i.max=s):l<c?(a=m-c,i.min=c,i.max=r-a):s>u&&(a=u-r,i.max=u,i.min=m+a)}function v(e,o,t){var n=i[e.type];n&&n(e,o,t)}e.Zoom.defaults=e.defaults.global.plugins.zoom={pan:{enabled:!1,mode:"xy",speed:20,threshold:10},zoom:{enabled:!1,mode:"xy",sensitivity:3,speed:.1}},n.zoomFunctions.category=function(e,o,t,a){var i=e.chart.data.labels,m=e.minIndex,r=i.length-1,l=e.maxIndex,u=a.sensitivity,d=e.isHorizontal()?e.left+e.width/2:e.top+e.height/2,p=e.isHorizontal()?t.x:t.y;n.zoomCumulativeDelta=o>1?n.zoomCumulativeDelta+1:n.zoomCumulativeDelta-1,Math.abs(n.zoomCumulativeDelta)>u&&(n.zoomCumulativeDelta<0?(p>=d?m<=0?l=Math.min(r,l+1):m=Math.max(0,m-1):p<d&&(l>=r?m=Math.max(0,m-1):l=Math.min(r,l+1)),n.zoomCumulativeDelta=0):n.zoomCumulativeDelta>0&&(p>=d?m=m<l?m=Math.min(l,m+1):m:p<d&&(l=l>m?l=Math.max(m,l-1):l),n.zoomCumulativeDelta=0),e.options.ticks.min=c(a,i[m]),e.options.ticks.max=s(a,i[l]))},n.zoomFunctions.time=function(e,o,t,n){u(e,o,t,n);var a=e.options;a.time&&(a.time.min&&(a.time.min=a.ticks.min),a.time.max&&(a.time.max=a.ticks.max))},n.zoomFunctions.linear=u,n.zoomFunctions.logarithmic=u,n.panFunctions.category=function(e,o,t){var a,i=e.chart.data.labels,m=i.length-1,r=Math.max(e.ticks.length,1),l=t.speed,
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