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main.c
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main.c
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/**
* @file main
*
*/
/*********************
* INCLUDES
*********************/
#define _DEFAULT_SOURCE /* needed for usleep() */
#include <stdlib.h>
#include <unistd.h>
#define SDL_MAIN_HANDLED /*To fix SDL's "undefined reference to WinMain" issue*/
#include <SDL2/SDL.h>
#include "lvgl/lvgl.h"
#include "lv_drivers/display/monitor.h"
#include "lv_drivers/indev/mouse.h"
#include "lv_drivers/indev/mousewheel.h"
#include "lv_drivers/indev/keyboard.h"
#include "lv_examples/lv_apps/demo/demo.h"
#include "lv_examples/lv_apps/benchmark/benchmark.h"
#include "lv_examples/lv_examples.h"
/*********************
* DEFINES
*********************/
/*On OSX SDL needs different handling*/
#if defined(__APPLE__) && defined(TARGET_OS_MAC)
# if __APPLE__ && TARGET_OS_MAC
#define SDL_APPLE
# endif
#endif
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void hal_init(void);
static int tick_thread(void * data);
static void memory_monitor(lv_task_t * param);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
int main(int argc, char ** argv)
{
(void) argc; /*Unused*/
(void) argv; /*Unused*/
/*Initialize LittlevGL*/
lv_init();
/*Initialize the HAL (display, input devices, tick) for LittlevGL*/
hal_init();
/*Create a demo*/
demo_create();
/*Try the benchmark to see how fast your GUI is*/
// benchmark_create();
/*Check the themes too*/
// lv_test_theme_1(lv_theme_night_init(15, NULL));
// lv_test_theme_2();
/*Try the touchpad-less navigation (use the Tab and Arrow keys or the Mousewheel)*/
// lv_test_group_1();
while(1) {
/* Periodically call the lv_task handler.
* It could be done in a timer interrupt or an OS task too.*/
lv_task_handler();
usleep(5 * 1000);
#ifdef SDL_APPLE
SDL_Event event;
while(SDL_PollEvent(&event)) {
#if USE_MOUSE != 0
mouse_handler(&event);
#endif
#if USE_KEYBOARD
keyboard_handler(&event);
#endif
#if USE_MOUSEWHEEL != 0
mousewheel_handler(&event);
#endif
}
#endif
}
return 0;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Initialize the Hardware Abstraction Layer (HAL) for the Littlev graphics library
*/
static void hal_init(void)
{
/* Use the 'monitor' driver which creates window on PC's monitor to simulate a display*/
monitor_init();
/*Create a display buffer*/
static lv_disp_buf_t disp_buf1;
static lv_color_t buf1_1[480*10];
lv_disp_buf_init(&disp_buf1, buf1_1, NULL, 480*10);
/*Create a display*/
lv_disp_drv_t disp_drv;
lv_disp_drv_init(&disp_drv); /*Basic initialization*/
disp_drv.buffer = &disp_buf1;
disp_drv.flush_cb = monitor_flush; /*Used when `LV_VDB_SIZE != 0` in lv_conf.h (buffered drawing)*/
lv_disp_drv_register(&disp_drv);
/* Add the mouse as input device
* Use the 'mouse' driver which reads the PC's mouse*/
mouse_init();
lv_indev_drv_t indev_drv;
lv_indev_drv_init(&indev_drv); /*Basic initialization*/
indev_drv.type = LV_INDEV_TYPE_POINTER;
indev_drv.read_cb = mouse_read; /*This function will be called periodically (by the library) to get the mouse position and state*/
lv_indev_t * mouse_indev = lv_indev_drv_register(&indev_drv);
/*Set a cursor for the mouse*/
LV_IMG_DECLARE(mouse_cursor_icon); /*Declare the image file.*/
lv_obj_t * cursor_obj = lv_img_create(lv_disp_get_scr_act(NULL), NULL); /*Create an image object for the cursor */
lv_img_set_src(cursor_obj, &mouse_cursor_icon); /*Set the image source*/
lv_indev_set_cursor(mouse_indev, cursor_obj); /*Connect the image object to the driver*/
/* Tick init.
* You have to call 'lv_tick_inc()' in periodically to inform LittelvGL about how much time were elapsed
* Create an SDL thread to do this*/
SDL_CreateThread(tick_thread, "tick", NULL);
/* Optional:
* Create a memory monitor task which prints the memory usage in periodically.*/
lv_task_create(memory_monitor, 3000, LV_TASK_PRIO_MID, NULL);
}
/**
* A task to measure the elapsed time for LittlevGL
* @param data unused
* @return never return
*/
static int tick_thread(void * data)
{
(void)data;
while(1) {
SDL_Delay(5); /*Sleep for 5 millisecond*/
lv_tick_inc(5); /*Tell LittelvGL that 5 milliseconds were elapsed*/
}
return 0;
}
/**
* Print the memory usage periodically
* @param param
*/
static void memory_monitor(lv_task_t * param)
{
(void) param; /*Unused*/
lv_mem_monitor_t mon;
lv_mem_monitor(&mon);
printf("used: %6d (%3d %%), frag: %3d %%, biggest free: %6d\n", (int)mon.total_size - mon.free_size,
mon.used_pct,
mon.frag_pct,
(int)mon.free_biggest_size);
}