WebThe cacheExtent describes how many pixels the cache area extends before the leading edge and after the trailing edge of the viewport. The total extent, which the viewport will try to cover with children, is cacheExtent before the leading edge + extent of the main axis + cacheExtent after the trailing edge. Web17 dec. 2024 · cacheExtent is the size of the area drawn before the visible part of the screen, it has two parts: one part for items already displayed before the visible area, and one part for after the visible area. When you make the size of the cacheExtent very large, you can almost make the ListView.builder draw all of its children before and ...
cacheExtent is not working as expected #31768 - Github
http://easck.com/cos/2024/1027/1059762.shtml Web30 mrt. 2024 · The cacheExtent describes how many pixels the cache area extends before the leading edge and after the trailing edge of the viewport. The total extent, which the viewport will try to cover with children, is cacheExtent before the leading edge + extent of the main axis + cacheExtent after the trailing edge. how many taxes are in india
ListView class - widgets library - Dart API
WebListView is the most commonly used scrolling widget. It displays its children one after another in the scroll direction. In the cross axis, the children are required to fill the ListView. If non-null, the itemExtent forces the children to have the given extent in the scroll direction. WebListView is the most commonly used scrolling widget. It displays its children one after another in the scroll direction. In the cross axis, the children are required to fill the ListView.. If non-null, the itemExtent forces the children to have the given extent in the scroll direction.. If non-null, the prototypeItem forces the children to have the same extent as the given … Webchild: ListView(cacheExtent: 500.0, children: const [SizedBox(height: 100.0,),],),),),),); expect(find.byType(Viewport), isNot(paints..clipRect()));}); testWidgets('ListView (fixed extent) clips if overflow is smaller than cacheExtent', (WidgetTester tester) async {// Regression test for … how many taxes are there in california