lv_refr.h File Reference

#include "lv_obj.h"
#include <stdbool.h>

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Functions
void	lv_refr_init (void)
void	lv_refr_now (lv_disp_t *disp)
void	lv_inv_area (lv_disp_t *disp, const lv_area_t *area_p)
lv_disp_t *	lv_refr_get_disp_refreshing (void)
void	lv_refr_set_disp_refreshing (lv_disp_t *disp)
void	lv_disp_refr_task (lv_task_t *task)

Function Documentation

lv_refr_init()

void lv_refr_init

(

void

)

Initialize the screen refresh subsystem

lv_refr_now()

void lv_refr_now

(

lv_disp_t *

disp

)

Redraw the invalidated areas now. Normally the redrawing is periodically executed in lv_task_handler but a long blocking process can prevent the call of lv_task_handler. In this case if the the GUI is updated in the process (e.g. progress bar) this function can be called when the screen should be updated.

Parameters

disp	pointer to display to refresh. NULL to refresh all displays.

lv_inv_area()

void lv_inv_area	(	lv_disp_t *	disp,
		const lv_area_t *	area_p
	)

Invalidate an area on display to redraw it

Parameters

area_p	pointer to area which should be invalidated (NULL: delete the invalidated areas)
disp	pointer to display where the area should be invalidated (NULL can be used if there is only one display)

lv_refr_get_disp_refreshing()

lv_disp_t* lv_refr_get_disp_refreshing

(

void

)

Get the display which is being refreshed

Returns

the display being refreshed

lv_refr_set_disp_refreshing()

void lv_refr_set_disp_refreshing

(

lv_disp_t *

disp

)

Set the display which is being refreshed. It shouldn1t be used directly by the user. It can be used to trick the drawing functions about there is an active display.

Parameters

the	display being refreshed

lv_disp_refr_task()

void lv_disp_refr_task

(

lv_task_t *

task

)

Called periodically to handle the refreshing

Parameters

task	pointer to the task itself