chart
The <chart> component displays line charts, gauge charts, and bar charts.
Required Permissions
None
Child Component
Not supported
Attributes
In addition to the attributes in Universal Attributes, the following attributes are supported.
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
type | string | line | No | Chart type. Dynamic modification is not supported. Available values include: -bar: bar chart -line: line chart -gauge: gauge chart -progress5+: circle chart of progresses -loading5+: circle chart of loading processes -rainbow5+: circle chart of proportions |
options | ChartOptions | - | No | Chart parameters. You must set parameters for bar charts and line charts. Parameter settings for gauge charts do not take effect. You can set the minimum value, maximum value, scale, and line width of the x-axis or y-axis, whether to display the x-axis and y-axis, and whether the line is smooth. Dynamic modification is not supported. |
datasets | Array<ChartDataset> | - | No | Data set. You must set data sets for bar charts and line charts. Data set for a gauge chart does not take effect. You can set multiple datasets and their background colors. |
segments5+ | DataSegment | Array<DataSegment> | - | No | Data structures used by progress, loading, and rainbow charts.DataSegment is available for progress and loading charts.Array<DataSegment> is available for rainbow charts. A maximum of nine DataSegment are supported in the array. |
effects5+ | boolean | true | No | Whether to enable the effects for progress and rainbow charts. |
animationduration6+ | number | 3000 | No | Animation duration for expanding a rainbow chart, in milliseconds. |
Table 1 ChartOptions
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
xAxis | ChartAxis | - | Yes | X-axis parameters. You can set the minimum value, maximum value, and scale of the x-axis, and whether to display the x-axis. |
yAxis | ChartAxis | - | Yes | Y-axis parameters. You can set the minimum value, maximum value, and scale of the y-axis, and whether to display the y-axis. |
series | ChartSeries | - | No | Data sequence parameters. -Line style, such as the line width and whether the line is smooth. -Style and size of the white point at the start of the line.NOTE:Only line charts support this attribute. |
Table 2 ChartDataset
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
strokeColor | <color> | #ff6384 | No | Line color.NOTE:Only line charts support this attribute. |
fillColor | <color> | #ff6384 | No | Fill color. For line charts, the value indicates the gradient color to fill. |
data | Array<number> | Array<Point>5+ | - | Yes | Data of the drawn line or bar. |
gradient | boolean | false | No | Whether to display the gradient color.NOTE:Only line charts support this attribute. |
Table 3 ChartAxis
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
min | number | 0 | No | Minimum value of the axis.NOTE:Only line charts support negative numbers. |
max | number | 100 | No | Maximum value of the axis.NOTE:Only line charts support negative numbers. |
axisTick | number | 10 | No | Number of scales displayed on the axis.NOTE:The value ranges from 1 to 20. The display effect depends on the calculation result of Number of pixels occupied by the image width/(max-min).In the bar chart, the number of bars in each group of data is the same as the number of scales, and the bars are displayed at the scales. |
display | boolean | false | No | Whether to display the axis. |
color | <color> | #c0c0c0 | No | Axis color. |
Table 4 ChartSeries
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
lineStyle | ChartLineStyle | - | No | Line style, such as the line width and whether the line is smooth. |
headPoint | PointStyle | - | No | Style and size of the white point at the start of the line. |
topPoint | PointStyle | - | No | Style and size of the top point. |
bottomPoint | PointStyle | - | No | Style and size of the bottom point. |
loop | ChartLoop | - | No | Whether to start drawing again when the screen is looped. |
Table 5 ChartLineStyle
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
width | <length> | 1px | No | Line width. |
smooth | boolean | false | No | Whether the line is smooth. |
Table 6 PointStyle
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
shape | string | circle | No | Shape of the highlight point. Available values are as follows: -Circle -Square -Triangle |
size | <length> | 5px | No | Size of the highlight point. |
strokeWidth | <length> | 1px | No | Stroke width. |
strokeColor | <color> | #ff0000 | No | Frame color. |
fillColor | <color> | #ff0000 | No | Fill color. |
Table 7 ChartLoop
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
margin | <length> | 1 | No | Number of erased points (horizontal distance between the latest drawn point and the earliest point). You are not advised to use margin together with topPoint, bottomPoint, or headPoint for lite devices. If you do so, there is a possibility that the point is in the erase area and invisible. |
gradient | boolean | false | No | Whether to perform gradient erase. |
Table 8 Point5+
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
value | number | 0 | Yes | Y coordinate of the point to draw. |
pointStyle | PointStyle | - | No | Style of the point. |
description | string | - | No | Description text of the point. |
textLocation | string | - | No | Description text position relative to the point. Available values are as follows:top: above the pointbottom: below the pointnone: not displayed |
textColor | <color> | #000000 | No | Color of the description text. |
lineDash | string | solid | No | Dashed line pattern. You can set the dash length and space length between the dashes. For example, "dashed, 5, 5" indicates a dashed line with each dash in 5 px and a 5 px space between each two dashes. Default value "solid" indicates a solid line. |
lineColor | <color> | #000000 | No | Line color. If this attribute is not set, the strokeColor is used by default. |
Table 9 DataSegment5+
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
startColor | Color | - | No | Color of the start position. If this attribute is set, endColor must be set. If this attribute is not set, the default color array preset in the system is used. For details about the color values, see the next table. |
endColor | Color | - | No | Color of the end position. If this attribute is set, startColor must be set.If this attribute is not set, the default color array preset in the system is used. |
value | number | 0 | Yes | Percentage for the current data segment. The maximum value is 100. |
name | string | - | No | Name of this data segment. |
Data Segment | Light Mode | Dark Mode |
---|---|---|
0 | Start color: #f7ce00; end color: #f99b11 | Start color: #d1a738; end color: #eb933d |
1 | Start color: #f76223; end color: #f2400a | Start color: #e67d50; end color: #d9542b |
2 | Start color: #f772ac; end color: #e65392 | Start color: #d5749e; end color: #d6568d |
3 | Start color: #a575eb; end color: #a12df7 | Start color: #9973d1; end color: #5552d9 |
4 | Start color: #7b79f7; end color: #4b48f7 | Start color: #7977d9; end color: #f99b11 |
5 | Start color: #4b8af3; end color: #007dff | Start color: #4c81d9; end color: #217bd9 |
6 | Start color: #73c1e6; end color: #4fb4e3 | Start color: #5ea6d1; end color: #4895c2 |
7 | Start color: #a5d61d; end color: #69d14f | Start color: #91c23a; end color: #70ba5d |
8 | Start color: #a2a2b0; end color: #8e8e93 | Start color: #8c8c99; end color: #6b6b76 |
For gauge charts, the following attribute is supported.
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
percent | number | 0 | No | Percentage of the current value to the total value. The value ranges from 0 to 100. |
Styles
In addition to the styles in Universal Styles, the following styles are supported.
Name | Type | Default Value | Mandatory | Description |
---|---|---|---|---|
stroke-width | <length> | 32px (gauge charts)24px (rainbow charts) | No | Width of the scale bar for gaugeand rainbow charts. |
start-angle | <deg> | 240 (gauge charts)0 (rainbow charts) | No | Start angle of the scale bar for gauge and rainbow charts, which starts from the direction of zero o'clock. The value ranges from 0 to 360. |
total-angle | <deg> | 240 (gauge charts)360 (rainbow charts) | No | Total length of the scale bar for gauge and rainbow charts. The value ranges from –360 to 360. A negative number indicates the anticlockwise direction. |
center-x | <length> | - | No | Center of the scale bar of the gauge component. This style is supported by the gauge chart only. This style takes precedence over the position style in the common styles, and must be used together with center-y and radius. This style is supported by the gauge chart only. |
center-y | <length> | - | No | Center of the scale bar of the gauge component. This style is supported by the gauge chart only. This style takes precedence over the position style in the common styles, and must be used together with center-x and radius. This style is supported by the gauge chart only. |
radius | <length> | - | No | Radius of the scale bar of the gauge component. This style is supported by the gauge chart only. This style takes precedence over the width and height in the common styles, and must be used together with center-x and center-y. This style is supported by the gauge chart only. |
colors | Array | - | No | Color of each section for the scale bar of the gauge component.For example, colors: #ff0000, #00ff00. This style is supported by the gauge chart only. |
weights | Array | - | No | Weight of each section for the scale bar of the gauge component.For example, weights: 2, 2. This style is supported by the gauge chart only. |
font-family5+ | Array | - | No | Font style of the description text. You can use Custom Font Styles. |
font-size5+ | <length> | - | No | Font size of the description text. |
Events
Events in Universal Events are supported.
Methods
In addition to the methods in Universal Methods, the following events are supported.
Method | Parameter | Description |
---|---|---|
append | {serial: number, // Set the data subscript of the line chart to be updated.data: Array<number>, // Set the new data.} | Data is dynamically added to an existing data sequence. The target sequence is specified based on serial, which is the subscript of the datasets array and starts from 0. datasets[index].data is not updated. Only line charts support this attribute. The value is incremented by 1 based on the horizontal coordinate and is related to the xAxis min/max setting. |
Example Code
-
Line chart
<!-- xxx.hml --> <div class="container"> <stack class="chart-region"> <image class="chart-background" src="common/background.png"></image> <chart class="chart-data" type="line" ref="linechart" options="{{lineOps}}" datasets="{{lineData}}"></chart> </stack> <button value="Add data" onclick="addData"></button> </div>
/* xxx.css */ .container { flex-direction: column; justify-content: center; align-items: center; } .chart-region { height: 400px; width: 700px; } .chart-background { object-fit: fill; } .chart-data { width: 700px; height: 600px; } button { width: 100%; height: 50px; background-color: #F4F2F1; text-color: #0C81F3; }
// xxx.js export default { data: { lineData: [ { strokeColor: '#0081ff', fillColor: '#cce5ff', data: [763, 550, 551, 554, 731, 654, 525, 696, 595, 628, 791, 505, 613, 575, 475, 553, 491, 680, 657, 716], gradient: true, } ], lineOps: { xAxis: { min: 0, max: 20, display: false, }, yAxis: { min: 0, max: 1000, display: false, }, series: { lineStyle: { width: "5px", smooth: true, }, headPoint: { shape: "circle", size: 20, strokeWidth: 5, fillColor: '#ffffff', strokeColor: '#007aff', display: true, }, loop: { margin: 2, gradient: true, } } }, }, addData() { this.$refs.linechart.append({ serial: 0, data: [Math.floor(Math.random() * 400) + 400] }) } }
-
Bar chart
<!-- xxx.hml --> <div class="container"> <stack class="data-region"> <image class="data-background" src="common/background.png"></image> <chart class="data-bar" type="bar" id="bar-chart" options="{{barOps}}" datasets="{{barData}}"></chart> </stack> </div>
/* xxx.css */ .container { flex-direction: column; justify-content: center; align-items: center; } .data-region { height: 400px; width: 700px; } .data-background { object-fit: fill; } .data-bar { width: 700px; height: 400px; }
// xxx.js export default { data: { barData: [ { fillColor: '#f07826', data: [763, 550, 551, 554, 731, 654, 525, 696, 595, 628], }, { fillColor: '#cce5ff', data: [535, 776, 615, 444, 694, 785, 677, 609, 562, 410], }, { fillColor: '#ff88bb', data: [673, 500, 574, 483, 702, 583, 437, 506, 693, 657], }, ], barOps: { xAxis: { min: 0, max: 20, display: false, axisTick: 10, }, yAxis: { min: 0, max: 1000, display: false, }, }, } }
-
Gauge chart
<!-- xxx.hml --> <div class="container"> <div class="gauge-region"> <chart class="data-gauge" type="gauge" percent = "50"></chart> </div> </div>
/* xxx.css */ .container { flex-direction: column; justify-content: center; align-items: center; } .gauge-region { height: 400px; width: 400px; } .data-gauge { colors: #83f115, #fd3636, #3bf8ff; weights: 4, 2, 1; }