Implementing blitting for colorbar indicators #168
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pshriwise
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Jan 23, 2026
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pshriwise
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Looks great! I updated the name of the PlotImage.colorbar attribute to something a little more descriptive that was pre-existing (the corresponding colorbar background cache name as well). Hope that's alright. There was a section of code that was throwing me a bit in PlotImage._blit_indicator where a background cache is selected. It helps there in particular I think.
I don't know that I've used the data indicator feature in a while, so thanks for noticing and addressing this!
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I recently tried using the data indicator with a mesh tally displayed in the plotter and found that it was practically unusable because it caused a full redraw of the image each time the mouse moved. This PR changes the indicator updates to use blitting so that updating the indicator line can be done quickly without redrawing the full image.