Draw vertical line in the middle of a line chart (indicator)

Question

I am using a chart library called MPAndroidChart and I am very pleased with it. However, I want to draw a thick vertical line (as a background, not as data) serving as an indicator in the the middle of the line graph. How can I do this?

Best regards.

Philipp Jahoda · Answer 1 · 2017-08-01T13:26:12.647

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You can use the LimitLine class to acheive this.

Basically, that class allows you to draw a customizeable line to a specified position on the y-axis in the chart and add a description to it.

After creating the line, you need to assign it to an XAxis or YAxis.

For more details, have a look at the documentation. You can find limitlines it on the bottom of the page.

Also, this example class shows how to use them: https://github.com/PhilJay/MPAndroidChart/blob/master/MPChartExample/src/com/xxmassdeveloper/mpchartexample/LineChartActivity1.java

UPDATE: Now LimitLines can be assigned to any axis!

edited Aug 01 '17 at 13:26

answered Mar 12 '15 at 14:43

Philipp Jahoda

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Thank you, this will create a horizontal line at the specified y position. What I want is an vertical line at the middle (graphwidth/2) of the graph, but limit lines cannot be assigned to an x-axis. – Moonlit Mar 12 '15 at 16:05
Sorry, I misread. What you described is not possible with limit lines then. You will have to modify the library itself to achieve this. I will consider adding vertical lines in a future update! – Philipp Jahoda Mar 12 '15 at 16:24
Did vertical lines ever get added? I see that sometimes when I touch the graph a verticle line is drawn. Can I hook in to that? – bhspencer Mar 22 '15 at 21:41

score 0 · Answer 2 · edited May 23 '17 at 12:26

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You can draw verctical lines on your graphic using Highlight class. See https://stackoverflow.com/a/42852833/4361772

edited May 23 '17 at 12:26

Community

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answered Mar 17 '17 at 08:48

Daniel Coello

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Draw vertical line in the middle of a line chart (indicator)

2 Answers2