Introduce ChangeFlags and use it instead of bools to track changes in views #6
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Zoxc
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Zoxc
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Thanks for this! I'm thinking it through, but while I'm doing that let me explain a bit why it is the way it is, and a potential downside. My initial concept of the That said, this change puts a (small) additional burden on other potential consumers of the widget tree, they have to set these flags correctly. Not a showstopper, but I think something to be considered. The real question for me is whether we can make the I like |
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I view the current state as having a 1-bit flag, with this PR extending it to n-bit flags. So you could consider the current
I would follow up this PR with the removal of the |
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Yeah, let's go ahead and do this. We can back it out later if it turns out to be a problem. Thanks!
Regarding update, that decision is tracked in #7, as the Widget trait is going to get massively reworked anyway. It might make sense to apply it now so we can experiment with the method missing, but what lands now in Widget won't be staying that way for long.
Zoxc
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Ah, there are merge conflicts now. This is approved, so feel free to resolve those and merge it. |
New tracy image:  New log tracing file: <details><summary>An overview of the new logs</summary> <p> ``` 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}: masonry::passes::update: RootWidget received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}: masonry::passes::update: Flex received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#8}: masonry::passes::update: Flex received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#8}:SizedBox{id=#7}: masonry::passes::update: SizedBox received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#8}:SizedBox{id=#7}:Flex{id=#6}: masonry::passes::update: Flex received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#8}:SizedBox{id=#7}:Flex{id=#6}:Flex{id=#3}: masonry::passes::update: Flex received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#8}:SizedBox{id=#7}:Flex{id=#6}:Flex{id=#3}:Prose{id=#1}: masonry::passes::update: Prose received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#8}:SizedBox{id=#7}:Flex{id=#6}:Flex{id=#3}:Label{id=#2}: masonry::passes::update: Label received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#8}:SizedBox{id=#7}:Flex{id=#6}:Flex{id=#5}: masonry::passes::update: Flex received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#8}:SizedBox{id=#7}:Flex{id=#6}:Flex{id=#5}:VariableLabel{id=#4}: masonry::passes::update: VariableLabel received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#17}: masonry::passes::update: Flex received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#17}:Button{id=#10}: masonry::passes::update: Button received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#17}:Button{id=#10}:Label{id=#9}: masonry::passes::update: Label received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#17}:Button{id=#12}: masonry::passes::update: Button received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#17}:Button{id=#12}:Label{id=#11}: masonry::passes::update: Label received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#17}:Button{id=#14}: masonry::passes::update: Button received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#17}:Button{id=#14}:Label{id=#13}: masonry::passes::update: Label received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#17}:Button{id=#16}: masonry::passes::update: Button received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Flex{id=#17}:Button{id=#16}:Label{id=#15}: masonry::passes::update: Label received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Portal{id=#163}: masonry::passes::update: Portal received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Portal{id=#163}:Flex{id=#160}: masonry::passes::update: Flex received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Portal{id=#163}:Flex{id=#160}:SizedBox{id=#24}: masonry::passes::update: SizedBox received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Portal{id=#163}:Flex{id=#160}:SizedBox{id=#24}:Flex{id=#23}: masonry::passes::update: Flex received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Portal{id=#163}:Flex{id=#160}:SizedBox{id=#24}:Flex{id=#23}:Flex{id=#20}: masonry::passes::update: Flex received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Portal{id=#163}:Flex{id=#160}:SizedBox{id=#24}:Flex{id=#23}:Flex{id=#20}:Prose{id=#18}: masonry::passes::update: Prose received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Portal{id=#163}:Flex{id=#160}:SizedBox{id=#24}:Flex{id=#23}:Flex{id=#20}:Label{id=#19}: masonry::passes::update: Label received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Portal{id=#163}:Flex{id=#160}:SizedBox{id=#24}:Flex{id=#23}:Flex{id=#22}: masonry::passes::update: Flex received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Portal{id=#163}:Flex{id=#160}:SizedBox{id=#24}:Flex{id=#23}:Flex{id=#22}:VariableLabel{id=#21}: masonry::passes::update: VariableLabel received Update::WidgetAdded 14:37:40.365Z TRACE update_new_widgets:RootWidget{id=#165}:Flex{id=#164}:Portal{id=#163}:Flex{id=#160}:SizedBox{id=#31}: masonry::passes::update: SizedBox received Update::WidgetAdded ``` </p> </details> This was originally an experiment into caching spans, but I determined that was non-viable due to the pass names.
This approach has a number of advantages.
set_labelandset_textdo not themselves set the flags and that these functions are the source of these flags.#[must_use]so flags are not accidentally missed, which I have done previously when writing views.updatephase unnecessary.ChangeFlagsorChangescould be some alternative names. The current name could easily be confused with theupdatephase.