Legend placement when wider than individual panels

[sbuis]

Description

When generating multi-panel plots with plot() in CroPlotR, the legend is currently positioned beside the panels (default behavior).

However, when the legend is wider than a single panel (e.g., many groups, long labels, or both), this results in compressed panels and poor readability.

In such cases, placing the legend to the right of the panels negatively impacts the visual clarity of the figure.

Expected behavior

If the legend width exceeds the width of a single panel, the legend should automatically be placed below the plots, rather than beside them.

Suggested implementation

• Detect legend grob width relative to panel width.
• If legend width > panel width:
  • Switch legend position to "bottom".
• Otherwise, keep the default placement.

[sbuis]

Seems to be rather complex to implement :-(

I updated the README in v1.0.1 to illustrate the possibility to switch the legend position using ggplot2.

Maybe a simpler solution for automatisation would be to switch the position when there is (strictly) more than 2 plots and a legend size superior to XXX characters (and when the legend size is superiori to YYY characters whatever is the number of plots)