cacheExtentStyle property Null safety
Controls how the cacheExtent is interpreted.
If set to CacheExtentStyle.pixel, the cacheExtent will be treated as a logical pixels, and the default cacheExtent is RenderAbstractViewport.defaultCacheExtent.
If set to CacheExtentStyle.viewport, the cacheExtent will be treated as a multiplier for the main axis extent of the viewport. In this case there is no default cacheExtent; it must be explicitly specified.
Changing the cacheExtentStyle without also changing the cacheExtent is rarely the correct choice.
Implementation
CacheExtentStyle get cacheExtentStyle => _cacheExtentStyle;Implementation
set cacheExtentStyle(CacheExtentStyle value) {
assert(value != null);
if (value == _cacheExtentStyle) {
return;
}
_cacheExtentStyle = value;
markNeedsLayout();
}