The skin-neutral slot engine. Builds one layer per slot and repaints them all on a store change. More...

#include "ui/engine/engine.h"
#include "text/cstring_fit.h"
#include <string.h>

Functions
static void	draw_update (Layer layer, GContext ctx)
	Draw-slot update proc: hand the module its own bounds.
static void	build (void)
	Work out the current slots and make one layer per slot.
static void	destroy (void)
	Destroy the slot layers.
void	engine_init (Window *window, EngineBuild build_cb)
	Build the slot layers for a face and paint them once.
void	engine_deinit (void)
	Tear down the slot layers.
void	engine_rebuild (void)
	Rebuild the slot layers (after a layout or theme change).
static void	repaint_slot (uint8_t i)
	Repaint one slot: a text-slot re-pulls and re-fits (skipping an unchanged string), a draw-slot marks its layer dirty.
void	engine_mark_dirty (void)
	Repaint every slot: text-slots re-pull + fit, draw-slots mark dirty.
void	engine_mark_dirty_tags (uint32_t changed)
	Repaint only the slots whose tags intersect changed (plus any slot with no tags). Lets a face route a store change to just the slots that read from it.

Variables
static Window *	s_window
	The window the slots are built in.
static EngineBuild	s_build
	What the face passed to the engine at init.
static EngineSlot	s_slots [ENGINE_SLOTS_MAX]
	The slots as the face defined them.
static Layer *	s_layers [ENGINE_SLOTS_MAX]
	Draw-slot layers, NULL for text-slots.
static TextLayer *	s_text_layers [ENGINE_SLOTS_MAX]
	Text-slot layers, NULL for draw-slots.
static char	s_last_text [ENGINE_SLOTS_MAX][24]
	The last string set on each slot, so an unchanged one skips the re-fit.
static uint8_t	s_count
	How many slots are in use.

Detailed Description

The skin-neutral slot engine. Builds one layer per slot and repaints them all on a store change.

Function Documentation

void draw_update	(	Layer *	layer,
		GContext *	ctx )

static

Draw-slot update proc: hand the module its own bounds.

Parameters

layer	The slot layer (its data holds the slot index).
ctx	The graphics context.

void repaint_slot ( uint8_t i )

static

Repaint one slot: a text-slot re-pulls and re-fits (skipping an unchanged string), a draw-slot marks its layer dirty.

Parameters

i	The slot index.