有没有办法在两次之间突出显示图表背景的特定范围？
以下是我想要重新创建的示例：Example chart（实际上这是我的图表，我使用photoshop添加突出显示区域以向您显示）。
在y轴上是温度，x轴是日期时间。
这是javascript：
var chartData = generateData();
var chart = AmCharts.makeChart("chartdiv", {
"type": "serial",
"theme": "light",
"marginRight": 80,
"autoMarginOffset": 20,
"marginTop": 7,
"dataProvider": chartData,
"valueAxes": [{
"axisAlpha": 0.2,
"dashLength": 1,
"position": "left"
}],
"mouseWheelZoomEnabled": true,
"graphs": [{
"id": "g1",
"balloonText": "[[value]]°",
"bullet": "round",
"bulletBorderAlpha": 1,
"bulletColor": "#FFFFFF",
"hideBulletsCount": 50,
"title": "red line",
"valueField": "temperature",
"useLineColorForBulletBorder": true,
"balloon": {
"drop": true
}
}],
"chartScrollbar": {
//"graph": "g1",
"oppositeAxis": false,
"scrollbarHeight": 30,
"dragIcon": "dragIconRectBig"
},
"chartCursor": {
"limitToGraph": "g1",
"categoryBalloonDateFormat": "YYYY-MM-DD HH:NN:SS"
},
"categoryField": "date",
"dataDateFormat": "YYYY-MM-DD HH:NN:SS",
"categoryAxis": {
"minPeriod": "hh",
"parseDates": true,
"axisColor": "#DADADA",
"dashLength": 1,
"minorGridEnabled": true
},
"export": {
"enabled": false
}
});
chart.addListener("rendered", zoomChart);
zoomChart();
// this method is called when chart is first inited as we listen for "rendered" event
function zoomChart() {
// different zoom methods can be used - zoomToIndexes, zoomToDates, zoomToCategoryValues
chart.zoomToIndexes(chartData.length - 40, chartData.length - 1);
//chart.zoomToDates(new Date(@Model.ElementAt(2).Timestamp * 1000), new Date());
}
function generateData() {
var data = [];
var date;
var temp;
@foreach (var wth in Model.OrderBy(e => e.Timestamp))
{
<text>
debugger;
temp = @wth.Temperature;
date = new Date(@wth.Timestamp * 1000);
data.push({
date: date,
temperature: temp
});
</text>
}
return data;
}
答案 0 :(得分：1)
您可以使用guides通过设置开始/结束点和填充颜色来突出显示范围，例如：
"categoryAxis": {
// ...
"guides": [{
"date": "2013-01-01",
"toDate": "2013-01-18",
"fillAlpha": .5,
"fillColor": "#00ff88"
}]
}
演示：
var chart = AmCharts.makeChart("chartdiv", {
"type": "serial",
"theme": "light",
"marginRight": 40,
"marginLeft": 40,
"autoMarginOffset": 20,
"mouseWheelZoomEnabled":true,
"dataDateFormat": "YYYY-MM-DD",
"valueAxes": [{
"id": "v1",
"axisAlpha": 0,
"position": "left",
"ignoreAxisWidth":true
}],
"balloon": {
"borderThickness": 1,
"shadowAlpha": 0
},
"graphs": [{
"id": "g1",
"balloon":{
"drop":true,
"adjustBorderColor":false,
"color":"#ffffff"
},
"bullet": "round",
"bulletBorderAlpha": 1,
"bulletColor": "#FFFFFF",
"bulletSize": 5,
"hideBulletsCount": 50,
"lineThickness": 2,
"title": "red line",
"useLineColorForBulletBorder": true,
"valueField": "value",
"balloonText": "<span style='font-size:18px;'>[[value]]</span>"
}],
"chartScrollbar": {
"graph": "g1",
"oppositeAxis":false,
"offset":30,
"scrollbarHeight": 80,
"backgroundAlpha": 0,
"selectedBackgroundAlpha": 0.1,
"selectedBackgroundColor": "#888888",
"graphFillAlpha": 0,
"graphLineAlpha": 0.5,
"selectedGraphFillAlpha": 0,
"selectedGraphLineAlpha": 1,
"autoGridCount":true,
"color":"#AAAAAA"
},
"chartCursor": {
"pan": true,
"valueLineEnabled": true,
"valueLineBalloonEnabled": true,
"cursorAlpha":1,
"cursorColor":"#258cbb",
"limitToGraph":"g1",
"valueLineAlpha":0.2,
"valueZoomable":true
},
"valueScrollbar":{
"oppositeAxis":false,
"offset":50,
"scrollbarHeight":10
},
"categoryField": "date",
"categoryAxis": {
"parseDates": true,
"dashLength": 1,
"minorGridEnabled": true,
"guides": [{
"date": "2013-01-01",
"toDate": "2013-01-18",
"fillAlpha": .5,
"fillColor": "#00ff88"
}]
},
"export": {
"enabled": true
},
"dataProvider": [{
"date": "2012-07-27",
"value": 13
}, {
"date": "2012-07-28",
"value": 11
}, {
"date": "2012-07-29",
"value": 15
}, {
"date": "2012-07-30",
"value": 16
}, {
"date": "2012-07-31",
"value": 18
}, {
"date": "2012-08-01",
"value": 13
}, {
"date": "2012-08-02",
"value": 22
}, {
"date": "2012-08-03",
"value": 23
}, {
"date": "2012-08-04",
"value": 20
}, {
"date": "2012-08-05",
"value": 17
}, {
"date": "2012-08-06",
"value": 16
}, {
"date": "2012-08-07",
"value": 18
}, {
"date": "2012-08-08",
"value": 21
}, {
"date": "2012-08-09",
"value": 26
}, {
"date": "2012-08-10",
"value": 24
}, {
"date": "2012-08-11",
"value": 29
}, {
"date": "2012-08-12",
"value": 32
}, {
"date": "2012-08-13",
"value": 18
}, {
"date": "2012-08-14",
"value": 24
}, {
"date": "2012-08-15",
"value": 22
}, {
"date": "2012-08-16",
"value": 18
}, {
"date": "2012-08-17",
"value": 19
}, {
"date": "2012-08-18",
"value": 14
}, {
"date": "2012-08-19",
"value": 15
}, {
"date": "2012-08-20",
"value": 12
}, {
"date": "2012-08-21",
"value": 8
}, {
"date": "2012-08-22",
"value": 9
}, {
"date": "2012-08-23",
"value": 8
}, {
"date": "2012-08-24",
"value": 7
}, {
"date": "2012-08-25",
"value": 5
}, {
"date": "2012-08-26",
"value": 11
}, {
"date": "2012-08-27",
"value": 13
}, {
"date": "2012-08-28",
"value": 18
}, {
"date": "2012-08-29",
"value": 20
}, {
"date": "2012-08-30",
"value": 29
}, {
"date": "2012-08-31",
"value": 33
}, {
"date": "2012-09-01",
"value": 42
}, {
"date": "2012-09-02",
"value": 35
}, {
"date": "2012-09-03",
"value": 31
}, {
"date": "2012-09-04",
"value": 47
}, {
"date": "2012-09-05",
"value": 52
}, {
"date": "2012-09-06",
"value": 46
}, {
"date": "2012-09-07",
"value": 41
}, {
"date": "2012-09-08",
"value": 43
}, {
"date": "2012-09-09",
"value": 40
}, {
"date": "2012-09-10",
"value": 39
}, {
"date": "2012-09-11",
"value": 34
}, {
"date": "2012-09-12",
"value": 29
}, {
"date": "2012-09-13",
"value": 34
}, {
"date": "2012-09-14",
"value": 37
}, {
"date": "2012-09-15",
"value": 42
}, {
"date": "2012-09-16",
"value": 49
}, {
"date": "2012-09-17",
"value": 46
}, {
"date": "2012-09-18",
"value": 47
}, {
"date": "2012-09-19",
"value": 55
}, {
"date": "2012-09-20",
"value": 59
}, {
"date": "2012-09-21",
"value": 58
}, {
"date": "2012-09-22",
"value": 57
}, {
"date": "2012-09-23",
"value": 61
}, {
"date": "2012-09-24",
"value": 59
}, {
"date": "2012-09-25",
"value": 67
}, {
"date": "2012-09-26",
"value": 65
}, {
"date": "2012-09-27",
"value": 61
}, {
"date": "2012-09-28",
"value": 66
}, {
"date": "2012-09-29",
"value": 69
}, {
"date": "2012-09-30",
"value": 71
}, {
"date": "2012-10-01",
"value": 67
}, {
"date": "2012-10-02",
"value": 63
}, {
"date": "2012-10-03",
"value": 46
}, {
"date": "2012-10-04",
"value": 32
}, {
"date": "2012-10-05",
"value": 21
}, {
"date": "2012-10-06",
"value": 18
}, {
"date": "2012-10-07",
"value": 21
}, {
"date": "2012-10-08",
"value": 28
}, {
"date": "2012-10-09",
"value": 27
}, {
"date": "2012-10-10",
"value": 36
}, {
"date": "2012-10-11",
"value": 33
}, {
"date": "2012-10-12",
"value": 31
}, {
"date": "2012-10-13",
"value": 30
}, {
"date": "2012-10-14",
"value": 34
}, {
"date": "2012-10-15",
"value": 38
}, {
"date": "2012-10-16",
"value": 37
}, {
"date": "2012-10-17",
"value": 44
}, {
"date": "2012-10-18",
"value": 49
}, {
"date": "2012-10-19",
"value": 53
}, {
"date": "2012-10-20",
"value": 57
}, {
"date": "2012-10-21",
"value": 60
}, {
"date": "2012-10-22",
"value": 61
}, {
"date": "2012-10-23",
"value": 69
}, {
"date": "2012-10-24",
"value": 67
}, {
"date": "2012-10-25",
"value": 72
}, {
"date": "2012-10-26",
"value": 77
}, {
"date": "2012-10-27",
"value": 75
}, {
"date": "2012-10-28",
"value": 70
}, {
"date": "2012-10-29",
"value": 72
}, {
"date": "2012-10-30",
"value": 70
}, {
"date": "2012-10-31",
"value": 72
}, {
"date": "2012-11-01",
"value": 73
}, {
"date": "2012-11-02",
"value": 67
}, {
"date": "2012-11-03",
"value": 68
}, {
"date": "2012-11-04",
"value": 65
}, {
"date": "2012-11-05",
"value": 71
}, {
"date": "2012-11-06",
"value": 75
}, {
"date": "2012-11-07",
"value": 74
}, {
"date": "2012-11-08",
"value": 71
}, {
"date": "2012-11-09",
"value": 76
}, {
"date": "2012-11-10",
"value": 77
}, {
"date": "2012-11-11",
"value": 81
}, {
"date": "2012-11-12",
"value": 83
}, {
"date": "2012-11-13",
"value": 80
}, {
"date": "2012-11-14",
"value": 81
}, {
"date": "2012-11-15",
"value": 87
}, {
"date": "2012-11-16",
"value": 82
}, {
"date": "2012-11-17",
"value": 86
}, {
"date": "2012-11-18",
"value": 80
}, {
"date": "2012-11-19",
"value": 87
}, {
"date": "2012-11-20",
"value": 83
}, {
"date": "2012-11-21",
"value": 85
}, {
"date": "2012-11-22",
"value": 84
}, {
"date": "2012-11-23",
"value": 82
}, {
"date": "2012-11-24",
"value": 73
}, {
"date": "2012-11-25",
"value": 71
}, {
"date": "2012-11-26",
"value": 75
}, {
"date": "2012-11-27",
"value": 79
}, {
"date": "2012-11-28",
"value": 70
}, {
"date": "2012-11-29",
"value": 73
}, {
"date": "2012-11-30",
"value": 61
}, {
"date": "2012-12-01",
"value": 62
}, {
"date": "2012-12-02",
"value": 66
}, {
"date": "2012-12-03",
"value": 65
}, {
"date": "2012-12-04",
"value": 73
}, {
"date": "2012-12-05",
"value": 79
}, {
"date": "2012-12-06",
"value": 78
}, {
"date": "2012-12-07",
"value": 78
}, {
"date": "2012-12-08",
"value": 78
}, {
"date": "2012-12-09",
"value": 74
}, {
"date": "2012-12-10",
"value": 73
}, {
"date": "2012-12-11",
"value": 75
}, {
"date": "2012-12-12",
"value": 70
}, {
"date": "2012-12-13",
"value": 77
}, {
"date": "2012-12-14",
"value": 67
}, {
"date": "2012-12-15",
"value": 62
}, {
"date": "2012-12-16",
"value": 64
}, {
"date": "2012-12-17",
"value": 61
}, {
"date": "2012-12-18",
"value": 59
}, {
"date": "2012-12-19",
"value": 53
}, {
"date": "2012-12-20",
"value": 54
}, {
"date": "2012-12-21",
"value": 56
}, {
"date": "2012-12-22",
"value": 59
}, {
"date": "2012-12-23",
"value": 58
}, {
"date": "2012-12-24",
"value": 55
}, {
"date": "2012-12-25",
"value": 52
}, {
"date": "2012-12-26",
"value": 54
}, {
"date": "2012-12-27",
"value": 50
}, {
"date": "2012-12-28",
"value": 50
}, {
"date": "2012-12-29",
"value": 51
}, {
"date": "2012-12-30",
"value": 52
}, {
"date": "2012-12-31",
"value": 58
}, {
"date": "2013-01-01",
"value": 60
}, {
"date": "2013-01-02",
"value": 67
}, {
"date": "2013-01-03",
"value": 64
}, {
"date": "2013-01-04",
"value": 66
}, {
"date": "2013-01-05",
"value": 60
}, {
"date": "2013-01-06",
"value": 63
}, {
"date": "2013-01-07",
"value": 61
}, {
"date": "2013-01-08",
"value": 60
}, {
"date": "2013-01-09",
"value": 65
}, {
"date": "2013-01-10",
"value": 75
}, {
"date": "2013-01-11",
"value": 77
}, {
"date": "2013-01-12",
"value": 78
}, {
"date": "2013-01-13",
"value": 70
}, {
"date": "2013-01-14",
"value": 70
}, {
"date": "2013-01-15",
"value": 73
}, {
"date": "2013-01-16",
"value": 71
}, {
"date": "2013-01-17",
"value": 74
}, {
"date": "2013-01-18",
"value": 78
}, {
"date": "2013-01-19",
"value": 85
}, {
"date": "2013-01-20",
"value": 82
}, {
"date": "2013-01-21",
"value": 83
}, {
"date": "2013-01-22",
"value": 88
}, {
"date": "2013-01-23",
"value": 85
}, {
"date": "2013-01-24",
"value": 85
}, {
"date": "2013-01-25",
"value": 80
}, {
"date": "2013-01-26",
"value": 87
}, {
"date": "2013-01-27",
"value": 84
}, {
"date": "2013-01-28",
"value": 83
}, {
"date": "2013-01-29",
"value": 84
}, {
"date": "2013-01-30",
"value": 81
}]
});
chart.addListener("rendered", zoomChart);
zoomChart();
function zoomChart() {
chart.zoomToIndexes(chart.dataProvider.length - 40, chart.dataProvider.length - 1);
}<script src="https://www.amcharts.com/lib/3/amcharts.js"></script>
<script src="https://www.amcharts.com/lib/3/serial.js"></script>
<script src="https://www.amcharts.com/lib/3/themes/light.js"></script>
<div id="chartdiv" style="width: 100%; height: 300px;"></div>