tachyon::LayoutEngine Class Reference

Computes element sizes and positions from styles, content and constraints, in four passes run after construction: More...

#include <gui_core/layout/gui_layout_engine.h>

Public Member Functions
	LayoutEngine (ITextSystem &textSystem, ScrollManagement &scrollManagement) noexcept
void	Layout (OSWindowManager &osWindowManager, ElementStorage &storage)
	Lays out every element in storage; call after EndConstruction.

Detailed Description

Computes element sizes and positions from styles, content and constraints, in four passes run after construction:

1. Horizontal sizing      - bottom-up natural widths
2. Horizontal positioning - top-down flex distribution, X positions
3. Vertical sizing        - bottom-up natural heights, with final widths
4. Vertical positioning   - top-down flex distribution, Y positions

A wrapping flex column breaks its lines on heights in pass 2, so pass 2 sizes its subtree vertically first, from the widths so far (pass 3 sizes it again).

Flex grow / shrink happens in the positioning passes, where the parent's final size is known; it cascades from ancestor to descendant.

Constructor & Destructor Documentation

LayoutEngine()

tachyon::LayoutEngine::LayoutEngine ( ITextSystem & textSystem, ScrollManagement & scrollManagement )

inlineexplicitnoexcept

Member Function Documentation

Layout()

void tachyon::LayoutEngine::Layout	(	OSWindowManager &	osWindowManager,
		ElementStorage &	storage )

Lays out every element in storage; call after EndConstruction.

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The documentation for this class was generated from the following file:

• gui_core/layout/gui_layout_engine.h