What are the common problems with the Flex scroll bar

This article will explain in detail what are the common questions about the Flex scroll bar. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

Flex scroll bar problem

The Flex scroll bar is easy to use, but there are always unexpected problems. As I said a few days ago, the problem of blurring the screen after dragging has found a more disgusting problem today. When you adjust the width of the container to 100%, verticalScrollbarPolicy uses the default auto. This is if you zoom the window will appear Flex scroll bar, but the problem is that whenever there is a vertical Flex scroll bar, the horizontal Flex scroll bar is forced to appear.

Viewplaincopytoclipboardprint?

This is because flex takes into account the width of the vertical Flex scroll bar when calculating the previous percentage, which I thought was the bug of flex at first. It makes a gorgeous sentence written in other official documents.

"FlexconsidersscrollbarsinitssizingcalculationsonlyifyouexplicitlysetthescrollpolicytoScrollPolicy.ON.So,ifyouuseanautoscrollpolicy (thedefault), thescrollbaroverlapsthebuttons.Topreventthisbehavior,youcansettheheightpropertyfortheHBoxcontainerorallowtheHBoxcontainertoresizebysettingapercentage-basedwidth.RememberthatchangingtheheightoftheHBoxcontainercausesothercomponentsinyourapplicationtomoveandresizeaccordingtotheirownsizingrules."-FromSizingComponentsintheFlex3help,under "UsingScrollbars"

The question was evaded in this way. But there's a way you can solve this problem by overloading the validateSize method.

Viewplaincopytoclipboardprint? / / InyourApplication,moduleorwhereveryouneedthisworkaround. OverridepublicfunctionvalidateSize (recursive:Boolean=false): void {super.validateSize (recursive); if (! initialized) return; if (height