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Base: Add manpages for new layout system

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This is far from explaining all implications of the new layout system,
but it covers the basics.
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FrHun 2022-05-11 01:25:18 +02:00 • committed by Sam Atkins
parent 1d6d074536
commit a78f84645c
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Base/usr/share/man/man5/GML-UI-Dimensions.md Normal file
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## Name
UI Dimensions
# Description
UI Dimension (or [GUI::UIDimension](file:///usr/src/serenity/Userland/Libraries/LibGUI/UIDimensions.h) in c++) is a special, union — of positive integer and enum — like, type that is used to represent dimensions in a user interface context.
It can either store positive integers ≥0 or special meaning values from a pre determined set.
## Basic Syntax
In GML UI Dimensions that are "regular" values (integer ≥0) are represented by JSON's int type,
while "special" values are represented by their name as a JSON string type.
# Special Values
Special Values carry size information that would otherwise not be intuitively possible to be transported by an integer (positive or negative) alone.
Importantly, while any "regular" (i.e. int ≥0) UI Dimension values might (by convention) be assigned to any UI Dimension property, many properties only allow a subset of the "special" values to be assigned to them.
| Name | c++ name | GML/JSON representation | General meaning |
|-------------------|--------------------------------------------|-------------------------|-------------------------------------------------|
| Regular | `GUI::SpecialDimension::Regular` (mock) | int ≥0 | This is a regular integer value specifying a specific size |
| Grow | `GUI::SpecialDimension::Grow` | `"grow"` | Grow to the maximum size the surrounding allows |
| OpportunisticGrow | `GUI::SpecialDimension::OpportunisticGrow` | `"opportunistic_grow"` | Grow when the opportunity arises, meaning — only when all other widgets have already grown to their maximum size, and only opportunistically growing widgets are left |
| Fit | `GUI::SpecialDimension::Fit` | `"fit"` | Grow exactly to the size of the surrounding as determined by other factors, but do not call for e.g. expansion of the parent container itself |
| Shrink | `GUI::SpecialDimension::Shrink` | `"shrink"` | Shrink to the smallest size possible |