PieChart Auto Height

[mikernet]

Is there some way to have a pie chart calculate the proper required height (including it's legend) so the pie chart fills the available width of the container it is in?

Needing to set an explicit height is problematic for me. I'm trying to replace another charting library where I had a pie chart placed in a grid column (WinUI / Uno) that sizes to a percentage of window width, and it would calculate the appropriate height automatically. As the window is resized (and thus the column it is in gets wider/narrower), it would adjust its height accordingly so that the pie chart filled the available width.

Alternatively, I could draw my own legend (outside of the pie chart control), but then I would still need a way to link the height of the chart to its width (so that height == available width and the circle can fill the space properly).

[beto-rodriguez]

Hi

The pie chart auto scales when the parent size changes, why is that not working for you? I am curious why is that not enough?

The next gif shows the library behaviour, it will always use the minimum of both (width or height) as the constraint to build the pie circumference.

[mikernet]

What I'm basically looking for is for the Measure() pass to automatically calculate the height based on the set width of the pie chart so that it always fills the available width and takes up as much height as it needs.

So in the above, both pies should be the same size, irrespective of how many legend items there are, and the whole chart should only take up as much vertical space as it needs to compactly render the pie and its legend without empty vertical space. The width of those charts is based on the width of the grid column where it is placed (and they are both equal above), but there's no way for me to say "set the height to exactly what is needed to render the pie full width with whatever legend it has".

If I set a predefined height for each pie chart then it changes the size of the pie based on how much space the legend takes up.

[mikernet]

(Sorry fixed the image above so both charts are set to same width and height, was playing with some stuff right before).

[mikernet]

I found a way to set the height of the pie chart to the available width as it changes, so I think my solution will be to just render the legend outside of the pie chart and each pie chart will maintain a square aspect ratio in it's available space ensuring they are the same size given the same available width. Is there a way for me to render just a legend as a separate control so I don't need to do that in an entirely custom manner?