Display Large Number of Data"
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| + | If you need to display large number of data points. There are several ways to handle it: | ||
| + | = Show Horizontal Scrollbar= | ||
| + | give a large width and allow overflow-x: | ||
| + | |||
| + | <syntaxhighlight lang='xml'> | ||
| + | <charts id="chart" type="line" width="3000"/> | ||
| + | <style> | ||
| + | .z-charts{ | ||
| + | overflow-x: auto !important; | ||
| + | } | ||
| + | </style> | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | = Enable X-axis Zoom = | ||
| + | After enabling the x-axis zoom: | ||
| + | <syntaxhighlight lang='java'> | ||
| + | chart.setZoomType("x"); | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | You can select a range by drag-and-drop to zoom in on a chart | ||
| + | |||
| + | |||
| + | See https://github.com/zkoss/zkchartsessentials/blob/master/src/main/webapp/event/events.zul | ||
| + | |||
| + | = Load Data of 1 Page One Time= | ||
| + | Define your size of data points for 1 page, then just load 1-page of data at the beginning. Provide 2 buttons for the next and previous page. When users click paging buttons, load the corresponding page of data. | ||
| + | |||
| + | = Change X Extremes Range = | ||
| + | Load all the data first. Set the X-axis data range like <code>chart.getXAxis().setExtremes(1, 10)</code>, so it only shows the first 10 points. Provide 2 buttons for the next and previous page. When users click the paging buttons, change x data extremes to a different range. | ||
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Latest revision as of 04:28, 14 November 2022
If you need to display large number of data points. There are several ways to handle it:
Show Horizontal Scrollbar
give a large width and allow overflow-x:
<charts id="chart" type="line" width="3000"/>
<style>
.z-charts{
overflow-x: auto !important;
}
</style>
Enable X-axis Zoom
After enabling the x-axis zoom:
chart.setZoomType("x");
You can select a range by drag-and-drop to zoom in on a chart
See https://github.com/zkoss/zkchartsessentials/blob/master/src/main/webapp/event/events.zul
Load Data of 1 Page One Time
Define your size of data points for 1 page, then just load 1-page of data at the beginning. Provide 2 buttons for the next and previous page. When users click paging buttons, load the corresponding page of data.
Change X Extremes Range
Load all the data first. Set the X-axis data range like chart.getXAxis().setExtremes(1, 10), so it only shows the first 10 points. Provide 2 buttons for the next and previous page. When users click the paging buttons, change x data extremes to a different range.
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