• Chart.js学习


    一、简介

      Chart.js是一个基于HTML5的简单的面向对象的图表库,支持包括IE78的所有现代浏览器。图表库中有6种表,分别是:曲线图(Linecharts)、柱状图(Barcharts)、雷达图(Radarcharts)、饼状图(Piecharts)、极坐标区域图(Polararea charts)以及圆环图(Doughnutcharts)。并且带有动画效果(animated),支持retina

    二、开始学习

    ①,首先Chart.js的官网地址是:http://www.chartjs.org/,可以从官网上下载JS文件。

    然后加入到html文件中。

    1 <script src="Chart.js" ></script>

    ②,曲线图(Line charts)

    曲线图适合于表示数据的趋势变化,以及数据之间的对比。

    测试代码如下:

      1 <html>
      2     <head>
      3         <title>TestChart.js</title>
      4         <script src="Chart.js" ></script>
      5     </head>
      6     <body>
      7         <canvas id="myChart" width="400" height="400"></canvas>
      8         <script type="text/javascript">
      9             var ctx = document.getElementById("myChart").getContext("2d");
     10             var data = {
     11                 /// 表现在X轴上的数据,数组形式
     12                 labels : ["January","February","March","April","May","June","July"],
     13                 /// 第一条线
     14                 datasets : [
     15                 {
     16                     /// 曲线的填充颜色
     17                     fillColor : "rgba(220,220,220,0.5)",
     18                     /// 填充块的边框线的颜色
     19                     strokeColor : "rgba(220,220,220,1)",
     20                     /// 表示数据的圆圈的颜色
     21                     pointColor : "rgba(220,220,220,1)",
     22                     /// 表示数据的圆圈的边的颜色
     23                     pointStrokeColor : "#fff",
     24                     data : [65,59,90,81,56,55,40]
     25                 },
     26                 /// 第二条线
     27                 {
     28                     fillColor : "rgba(151,187,205,0.5)",
     29                     strokeColor : "rgba(151,187,205,1)",
     30                     pointColor : "rgba(151,187,205,1)",
     31                     pointStrokeColor : "#fff",
     32                     data : [28,48,40,19,96,27,100]
     33                 }
     34                 ]
     35             }
     36             /// 动画效果
     37             var options = {
     38                 
     39                 //Boolean - If we show the scale above the chart data            
     40                 scaleOverlay : false,
     41     
     42                 //Boolean - If we want to override with a hard coded scale
     43                 scaleOverride : false,
     44     
     45                 //** Required if scaleOverride is true **
     46                 //Number - The number of steps in a hard coded scale
     47                 scaleSteps : null,
     48                 //Number - The value jump in the hard coded scale
     49                 scaleStepWidth : null,
     50                 //Number - The scale starting value
     51                 scaleStartValue : null,
     52 
     53                 //String - Colour of the scale line    
     54                 scaleLineColor : "rgba(0,0,0,.1)",
     55     
     56                 //Number - Pixel width of the scale line    
     57                 scaleLineWidth : 1,
     58 
     59                 //Boolean - Whether to show labels on the scale    
     60                 scaleShowLabels : true,
     61     
     62                 //Interpolated JS string - can access value
     63                 scaleLabel : "<%=value%>",
     64     
     65                 //String - Scale label font declaration for the scale label
     66                 scaleFontFamily : "'Arial'",
     67     
     68                 //Number - Scale label font size in pixels    
     69                 scaleFontSize : 12,
     70     
     71                 //String - Scale label font weight style    
     72                 scaleFontStyle : "normal",
     73     
     74                 //String - Scale label font colour    
     75                 scaleFontColor : "#666",    
     76     
     77                 ///Boolean - Whether grid lines are shown across the chart
     78                 scaleShowGridLines : true,
     79                 
     80                 //String - Colour of the grid lines
     81                 scaleGridLineColor : "rgba(0,0,0,.05)",
     82     
     83                 //Number - Width of the grid lines
     84                 scaleGridLineWidth : 1,    
     85     
     86                 //Boolean - Whether the line is curved between points
     87                 bezierCurve : true,
     88     
     89                 //Boolean - Whether to show a dot for each point
     90                 pointDot : true,
     91     
     92                 //Number - Radius of each point dot in pixels
     93                 pointDotRadius : 3,
     94     
     95                 //Number - Pixel width of point dot stroke
     96                 pointDotStrokeWidth : 1,
     97     
     98                 //Boolean - Whether to show a stroke for datasets
     99                 datasetStroke : true,
    100     
    101                 //Number - Pixel width of dataset stroke
    102                 datasetStrokeWidth : 2,
    103     
    104                 //Boolean - Whether to fill the dataset with a colour
    105                 datasetFill : true,
    106     
    107                 //Boolean - Whether to animate the chart
    108                 animation : true,
    109 
    110                 //Number - Number of animation steps
    111                 animationSteps : 60,
    112     
    113                 //String - Animation easing effect
    114                 animationEasing : "easeOutQuart",
    115 
    116                 //Function - Fires when the animation is complete
    117                 onAnimationComplete : null
    118     
    119             }
    120             /// 创建对象,生成图表
    121             new Chart(ctx).Line(data,options);
    122         </script>
    123     </body>
    124 </html>

    效果如下:

    ③,柱状图(Barcharts)

    代码如下:

      1 <html>
      2     <head>
      3         <title>TestChart.js</title>
      4         <script src="Chart.js" ></script>
      5     </head>
      6     <body>
      7         <canvas id="myChart" width="400" height="400"></canvas>
      8         <script type="text/javascript">
      9             var ctx = document.getElementById("myChart").getContext("2d");
     10             var data = {
     11                 /// 表现在X轴上的数据,数组形式
     12                 labels : ["January","February","March","April","May","June","July"],
     13                 /// 第一条线
     14                 datasets : [
     15                 {
     16                     /// 填充颜色
     17                     fillColor : "red",
     18                     /// 填充块的边框线的颜色
     19                     strokeColor : "yellow",
     20                     data : [65,59,90,81,56,55,40]
     21                 },
     22                 /// 第二条线
     23                 {
     24                     fillColor : "blue",
     25                     strokeColor : "green",
     26                     data : [28,48,40,19,96,27,100]
     27                 }
     28                 ]
     29             }
     30             /// 动画效果
     31             var options = {
     32                 
     33                 //Boolean - If we show the scale above the chart data            
     34                 scaleOverlay : false,
     35     
     36                 //Boolean - If we want to override with a hard coded scale
     37                 scaleOverride : false,
     38     
     39                 //** Required if scaleOverride is true **
     40                 //Number - The number of steps in a hard coded scale
     41                 scaleSteps : null,
     42                 //Number - The value jump in the hard coded scale
     43                 scaleStepWidth : null,
     44                 //Number - The scale starting value
     45                 scaleStartValue : null,
     46 
     47                 //String - Colour of the scale line    
     48                 scaleLineColor : "rgba(0,0,0,.1)",
     49     
     50                 //Number - Pixel width of the scale line    
     51                 scaleLineWidth : 1,
     52 
     53                 //Boolean - Whether to show labels on the scale    
     54                 scaleShowLabels : true,
     55     
     56                 //Interpolated JS string - can access value
     57                 scaleLabel : "<%=value%>",
     58     
     59                 //String - Scale label font declaration for the scale label
     60                 scaleFontFamily : "'Arial'",
     61     
     62                 //Number - Scale label font size in pixels    
     63                 scaleFontSize : 12,
     64     
     65                 //String - Scale label font weight style    
     66                 scaleFontStyle : "normal",
     67     
     68                 //String - Scale label font colour    
     69                 scaleFontColor : "#666",    
     70     
     71                 ///Boolean - Whether grid lines are shown across the chart
     72                 scaleShowGridLines : true,
     73                 
     74                 //String - Colour of the grid lines
     75                 scaleGridLineColor : "rgba(0,0,0,.05)",
     76     
     77                 //Number - Width of the grid lines
     78                 scaleGridLineWidth : 1,    
     79     
     80                 //Boolean - Whether the line is curved between points
     81                 bezierCurve : true,
     82     
     83                 //Boolean - Whether to show a dot for each point
     84                 pointDot : true,
     85     
     86                 //Number - Radius of each point dot in pixels
     87                 pointDotRadius : 3,
     88     
     89                 //Number - Pixel width of point dot stroke
     90                 pointDotStrokeWidth : 1,
     91     
     92                 //Boolean - Whether to show a stroke for datasets
     93                 datasetStroke : true,
     94     
     95                 //Number - Pixel width of dataset stroke
     96                 datasetStrokeWidth : 2,
     97     
     98                 //Boolean - Whether to fill the dataset with a colour
     99                 datasetFill : true,
    100     
    101                 //Boolean - Whether to animate the chart
    102                 animation : true,
    103 
    104                 //Number - Number of animation steps
    105                 animationSteps : 60,
    106     
    107                 //String - Animation easing effect
    108                 animationEasing : "easeOutQuart",
    109 
    110                 //Function - Fires when the animation is complete
    111                 onAnimationComplete : null
    112     
    113             }
    114             /// 创建对象,生成图表
    115             new Chart(ctx).Bar(data,options);
    116         </script>
    117     </body>
    118 </html>
    119             

    效果如下:

    ④,雷达图(Radar charts)

     代码如下:

      1 <html>
      2     <head>
      3         <title>TestChart.js</title>
      4         <script src="Chart.js" ></script>
      5     </head>
      6     <body>
      7         <canvas id="myChart" width="400" height="400"></canvas>
      8         <script type="text/javascript">
      9             var ctx = document.getElementById("myChart").getContext("2d");
     10             var data = {
     11                     labels : ["Eating","Drinking","Sleeping","Designing","Coding","Partying","Running"],
     12                     datasets : [
     13                         {
     14                             fillColor : "rgba(220,220,220,0.5)",
     15                             strokeColor : "rgba(220,220,220,1)",
     16                             pointColor : "rgba(220,220,220,1)",
     17                             pointStrokeColor : "#fff",
     18                             data : [65,59,90,81,56,55,40]
     19                         },
     20                         {
     21                             fillColor : "rgba(151,187,205,0.5)",
     22                             strokeColor : "rgba(151,187,205,1)",
     23                             pointColor : "rgba(151,187,205,1)",
     24                             pointStrokeColor : "#fff",
     25                             data : [28,48,40,19,96,27,100]
     26                         }
     27                     ]
     28             }
     29             /// 动画效果
     30             var options = {
     31                 
     32     //Boolean - If we show the scale above the chart data            
     33     scaleOverlay : false,
     34     
     35     //Boolean - If we want to override with a hard coded scale
     36     scaleOverride : false,
     37     
     38     //** Required if scaleOverride is true **
     39     //Number - The number of steps in a hard coded scale
     40     scaleSteps : null,
     41     //Number - The value jump in the hard coded scale
     42     scaleStepWidth : null,
     43     //Number - The centre starting value
     44     scaleStartValue : null,
     45     
     46     //Boolean - Whether to show lines for each scale point
     47     scaleShowLine : true,
     48 
     49     //String - Colour of the scale line    
     50     scaleLineColor : "rgba(0,0,0,.1)",
     51     
     52     //Number - Pixel width of the scale line    
     53     scaleLineWidth : 1,
     54 
     55     //Boolean - Whether to show labels on the scale    
     56     scaleShowLabels : false,
     57     
     58     //Interpolated JS string - can access value
     59     scaleLabel : "<%=value%>",
     60     
     61     //String - Scale label font declaration for the scale label
     62     scaleFontFamily : "'Arial'",
     63     
     64     //Number - Scale label font size in pixels    
     65     scaleFontSize : 12,
     66     
     67     //String - Scale label font weight style    
     68     scaleFontStyle : "normal",
     69     
     70     //String - Scale label font colour    
     71     scaleFontColor : "#666",
     72     
     73     //Boolean - Show a backdrop to the scale label
     74     scaleShowLabelBackdrop : true,
     75     
     76     //String - The colour of the label backdrop    
     77     scaleBackdropColor : "rgba(255,255,255,0.75)",
     78     
     79     //Number - The backdrop padding above & below the label in pixels
     80     scaleBackdropPaddingY : 2,
     81     
     82     //Number - The backdrop padding to the side of the label in pixels    
     83     scaleBackdropPaddingX : 2,
     84     
     85     //Boolean - Whether we show the angle lines out of the radar
     86     angleShowLineOut : true,
     87     
     88     //String - Colour of the angle line
     89     angleLineColor : "rgba(0,0,0,.1)",
     90     
     91     //Number - Pixel width of the angle line
     92     angleLineWidth : 1,            
     93     
     94     //String - Point label font declaration
     95     pointLabelFontFamily : "'Arial'",
     96     
     97     //String - Point label font weight
     98     pointLabelFontStyle : "normal",
     99     
    100     //Number - Point label font size in pixels    
    101     pointLabelFontSize : 12,
    102     
    103     //String - Point label font colour    
    104     pointLabelFontColor : "#666",
    105     
    106     //Boolean - Whether to show a dot for each point
    107     pointDot : true,
    108     
    109     //Number - Radius of each point dot in pixels
    110     pointDotRadius : 3,
    111     
    112     //Number - Pixel width of point dot stroke
    113     pointDotStrokeWidth : 1,
    114     
    115     //Boolean - Whether to show a stroke for datasets
    116     datasetStroke : true,
    117     
    118     //Number - Pixel width of dataset stroke
    119     datasetStrokeWidth : 2,
    120     
    121     //Boolean - Whether to fill the dataset with a colour
    122     datasetFill : true,
    123     
    124     //Boolean - Whether to animate the chart
    125     animation : true,
    126 
    127     //Number - Number of animation steps
    128     animationSteps : 60,
    129     
    130     //String - Animation easing effect
    131     animationEasing : "easeOutQuart",
    132 
    133     //Function - Fires when the animation is complete
    134     onAnimationComplete : null
    135     
    136 }
    137             /// 创建对象,生成图表
    138             new Chart(ctx).Radar(data,options);
    139         </script>
    140     </body>
    141 </html>
    142             

    效果如下:

    ⑤,饼状图(Piecharts)

    代码如下:

     1 <html>
     2     <head>
     3         <title>TestChart.js</title>
     4         <script src="Chart.js" ></script>
     5     </head>
     6     <body>
     7         <canvas id="myChart" width="400" height="400"></canvas>
     8         <script type="text/javascript">
     9             var ctx = document.getElementById("myChart").getContext("2d");
    10             var data = [
    11     {
    12         value: 30,
    13         color:"#F38630"
    14     },
    15     {
    16         value : 50,
    17         color : "#E0E4CC"
    18     },
    19     {
    20         value : 100,
    21         color : "#69D2E7"
    22     }            
    23 ]
    24             /// 动画效果
    25             var options = {
    26     //Boolean - Whether we should show a stroke on each segment
    27     segmentShowStroke : true,
    28     
    29     //String - The colour of each segment stroke
    30     segmentStrokeColor : "#fff",
    31     
    32     //Number - The width of each segment stroke
    33     segmentStrokeWidth : 2,
    34     
    35     //Boolean - Whether we should animate the chart    
    36     animation : true,
    37     
    38     //Number - Amount of animation steps
    39     animationSteps : 100,
    40     
    41     //String - Animation easing effect
    42     animationEasing : "easeOutBounce",
    43     
    44     //Boolean - Whether we animate the rotation of the Pie
    45     animateRotate : true,
    46 
    47     //Boolean - Whether we animate scaling the Pie from the centre
    48     animateScale : false,
    49     
    50     //Function - Will fire on animation completion.
    51     onAnimationComplete : null
    52 }
    53             /// 创建对象,生成图表
    54             new Chart(ctx).Pie(data,options);
    55         </script>
    56     </body>
    57 </html>
    58             

    效果如下:

    ⑤,极坐标区域图(Polararea charts)

    代码如下:

      1 <html>
      2     <head>
      3         <title>TestChart.js</title>
      4         <script src="Chart.js" ></script>
      5     </head>
      6     <body>
      7         <canvas id="myChart" width="400" height="400"></canvas>
      8         <script type="text/javascript">
      9             var ctx = document.getElementById("myChart").getContext("2d");
     10             var data = [
     11     {
     12         value : 30,
     13         color: "#D97041"
     14     },
     15     {
     16         value : 90,
     17         color: "#C7604C"
     18     },
     19     {
     20         value : 24,
     21         color: "#21323D"
     22     },
     23     {
     24         value : 58,
     25         color: "#9D9B7F"
     26     },
     27     {
     28         value : 82,
     29         color: "#7D4F6D"
     30     },
     31     {
     32         value : 8,
     33         color: "#584A5E"
     34     }
     35 ]
     36             /// 动画效果
     37             var options = {
     38                 
     39     //Boolean - Whether we show the scale above or below the chart segments
     40     scaleOverlay : true,
     41     
     42     //Boolean - If we want to override with a hard coded scale
     43     scaleOverride : false,
     44     
     45     //** Required if scaleOverride is true **
     46     //Number - The number of steps in a hard coded scale
     47     scaleSteps : null,
     48     //Number - The value jump in the hard coded scale
     49     scaleStepWidth : null,
     50     //Number - The centre starting value
     51     scaleStartValue : null,
     52     
     53     //Boolean - Show line for each value in the scale
     54     scaleShowLine : true,
     55     
     56     //String - The colour of the scale line
     57     scaleLineColor : "rgba(0,0,0,.1)",
     58     
     59     //Number - The width of the line - in pixels
     60     scaleLineWidth : 1,
     61     
     62     //Boolean - whether we should show text labels
     63     scaleShowLabels : true,
     64     
     65     //Interpolated JS string - can access value
     66     scaleLabel : "<%=value%>",
     67     
     68     //String - Scale label font declaration for the scale label
     69     scaleFontFamily : "'Arial'",
     70     
     71     //Number - Scale label font size in pixels    
     72     scaleFontSize : 12,
     73     
     74     //String - Scale label font weight style    
     75     scaleFontStyle : "normal",
     76     
     77     //String - Scale label font colour    
     78     scaleFontColor : "#666",
     79     
     80     //Boolean - Show a backdrop to the scale label
     81     scaleShowLabelBackdrop : true,
     82     
     83     //String - The colour of the label backdrop    
     84     scaleBackdropColor : "rgba(255,255,255,0.75)",
     85     
     86     //Number - The backdrop padding above & below the label in pixels
     87     scaleBackdropPaddingY : 2,
     88     
     89     //Number - The backdrop padding to the side of the label in pixels    
     90     scaleBackdropPaddingX : 2,
     91 
     92     //Boolean - Stroke a line around each segment in the chart
     93     segmentShowStroke : true,
     94     
     95     //String - The colour of the stroke on each segement.
     96     segmentStrokeColor : "#fff",
     97     
     98     //Number - The width of the stroke value in pixels    
     99     segmentStrokeWidth : 2,
    100     
    101     //Boolean - Whether to animate the chart or not
    102     animation : true,
    103     
    104     //Number - Amount of animation steps
    105     animationSteps : 100,
    106     
    107     //String - Animation easing effect.
    108     animationEasing : "easeOutBounce",
    109 
    110     //Boolean - Whether to animate the rotation of the chart
    111     animateRotate : true,
    112     
    113     //Boolean - Whether to animate scaling the chart from the centre
    114     animateScale : false,
    115 
    116     //Function - This will fire when the animation of the chart is complete.
    117     onAnimationComplete : null
    118 }
    119             /// 创建对象,生成图表
    120             new Chart(ctx).PolarArea(data,options);
    121         </script>
    122     </body>
    123 </html>
    124             

    效果如下:

    ⑥,圆环图(Doughnutcharts)

    代码如下:

     1 <html>
     2     <head>
     3         <title>TestChart.js</title>
     4         <script src="Chart.js" ></script>
     5     </head>
     6     <body>
     7         <canvas id="myChart" width="400" height="400"></canvas>
     8         <script type="text/javascript">
     9             var ctx = document.getElementById("myChart").getContext("2d");
    10             var data = [
    11     {
    12         value: 30,
    13         color:"#F7464A"
    14     },
    15     {
    16         value : 50,
    17         color : "#E2EAE9"
    18     },
    19     {
    20         value : 100,
    21         color : "#D4CCC5"
    22     },
    23     {
    24         value : 40,
    25         color : "#949FB1"
    26     },
    27     {
    28         value : 120,
    29         color : "#4D5360"
    30     }
    31 
    32 ]
    33             /// 动画效果
    34             var options = {
    35     //Boolean - Whether we should show a stroke on each segment
    36     segmentShowStroke : true,
    37     
    38     //String - The colour of each segment stroke
    39     segmentStrokeColor : "#fff",
    40     
    41     //Number - The width of each segment stroke
    42     segmentStrokeWidth : 2,
    43     
    44     //The percentage of the chart that we cut out of the middle.
    45     percentageInnerCutout : 50,
    46     
    47     //Boolean - Whether we should animate the chart    
    48     animation : true,
    49     
    50     //Number - Amount of animation steps
    51     animationSteps : 100,
    52     
    53     //String - Animation easing effect
    54     animationEasing : "easeOutBounce",
    55     
    56     //Boolean - Whether we animate the rotation of the Doughnut
    57     animateRotate : true,
    58 
    59     //Boolean - Whether we animate scaling the Doughnut from the centre
    60     animateScale : false,
    61     
    62     //Function - Will fire on animation completion.
    63     onAnimationComplete : null
    64 }
    65             /// 创建对象,生成图表
    66             new Chart(ctx).Doughnut(data,options);
    67         </script>
    68     </body>
    69 </html>
    70             

    效果如下:

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  • 原文地址:https://www.cnblogs.com/huashui/p/3413349.html
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