New way to make a menu (menu/tooltip/popup) #4669
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emilk
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Jun 26, 2024
The menu buttons, combo box menus, and tooltips don't take layer transforms into account when placing their popups, resulting in popups being placed in the wrong location. This PR makes the popups take layer transforms into account, transforming the positions before displaying them on screen. I implemented this fix for menu buttons, combo boxes, and tooltips; let me know if there's anything I missed. Scaling of the popups is purposefully ignored for now. Personally, I think popup scaling isn't necessary but if it is required I can implement it (also it would require doing more invasive things to the code and I want to keep this as simple as possible.) Before the fix: (with a modified version of the "Pan Zoom" web demo) <video src=https://github.com/emilk/egui/assets/104604363/a2d79757-c410-4815-8159-b64d6bd668ee> After: <video src=https://github.com/emilk/egui/assets/104604363/48f8b1d1-d30f-44bf-961f-f10b85964a92> The frame delay seems to be unavoidable unless we can move the popups _after_ the layer transform is set (or apply the transforms to the popup during painting). I think this would be better implemented once the menu/popup/tooltip unification is done (#4669).
hacknus
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Oct 30, 2024
) The menu buttons, combo box menus, and tooltips don't take layer transforms into account when placing their popups, resulting in popups being placed in the wrong location. This PR makes the popups take layer transforms into account, transforming the positions before displaying them on screen. I implemented this fix for menu buttons, combo boxes, and tooltips; let me know if there's anything I missed. Scaling of the popups is purposefully ignored for now. Personally, I think popup scaling isn't necessary but if it is required I can implement it (also it would require doing more invasive things to the code and I want to keep this as simple as possible.) Before the fix: (with a modified version of the "Pan Zoom" web demo) <video src=https://github.com/emilk/egui/assets/104604363/a2d79757-c410-4815-8159-b64d6bd668ee> After: <video src=https://github.com/emilk/egui/assets/104604363/48f8b1d1-d30f-44bf-961f-f10b85964a92> The frame delay seems to be unavoidable unless we can move the popups _after_ the layer transform is set (or apply the transforms to the popup during painting). I think this would be better implemented once the menu/popup/tooltip unification is done (emilk#4669).
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I've been working on this in order to unify menus with tooltips/popups. But due to the lack of time I'm unable to finish it properly. If you have time and like the idea feel free to continue my work.
I didn't touch the
menumodule. All changes are located in thenew_menumodule and some examples in theexamples/new_menuChanges
Menustruct that allows you to create a menu where you can specify the handle that describes the menu's behavior