Scale and displacement by code

[mariovillamizar]

Hi @danielgindi , thank you for this great library, it's amazing. I have a question. I have two charts, a chart below the other. I need to synchronize both charts. I mean, when a chart is displaced and/or scaled, the other chart should also do the same. It this possible? How can I do this?

[liuxuan30]

Definitely it's possible, but this will requires some addtional understanding how the scale and scroll works.

There is a class called ChartViewPortHandler, and there are the methods you need to scale/scroll or even give your own matrix.

[mariovillamizar]

Hi again @liuxuan30 and @danielgindi. I managed to synchronize zoom and scroll of both charts. Now the problem that I have is that the size of the charts changes when I zoom or scroll as the y-axis values change.

Example:

I need to synchronize the size of chart too. I need that the size of both charts is always the same.

Example:

[liuxuan30]

1. the size of the charts changes when I zoom or scroll
the size of the chart is controlled by the frame, right? Have you change it? The zoom/scroll will never change the frame. Not sure the meaning
2. as the y-axis values change.
the y-axis value will change, because you are zooming! Right? :)