I have a heatmap chart, using rect, that connected to other chart.
When using BoxSelectTool to select area, the selected area shown on the other chart.
All works fine.
By default, Bokeh makes unselected rects transparent, but I don’t want it.
What I want is to keep the squared selected area shown on the chart.
Is there a way to achieve it without drawing a new glyph manually?
If not, what is the best approach to draw a square on the area using the indices from the selection event?