ToggleButtons focus,highlight,hoverElevation = 0 #75454
Merged
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The focus, highlight, and hoverElevation for ToggleButtons should be zero. Till now, these elevations were not specified and the underlying RawMaterialButtonWidget made them 4 by default. This caused the usual problems with elevated Material widgets with translucent backgrounds: the grey elevation shadow fills the widget and shows through the translucent background.
Old ToggleButtons with item 0 focused, item 1 hovered, item 2 selected:
New ToggleButtons
Fixes #73403