A simple operating system for the ESP32-based M5StickC
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struct Window
{
int hwnd = 0;
void (*callback)(int, int, int, int, int);
int hwnd_parent = 0;
int layout_mode = 0;
bool placeholder = false;
};
#define LAYOUT_MODE_NONE 0
#define LAYOUT_MODE_SPLIT_VERTICAL 1
#define LAYOUT_MODE_SPLIT_HORIZONTAL 2
#define LAYOUT_MODE_SPLIT_AUTO 3
#define ROTATION_VERTICAL_BUTTON_UP 0
#define ROTATION_HORIZONTAL_BUTTON_RIGHT 1
#define ROTATION_VERTICAL_BUTTON_DOWN 2
#define ROTATION_HORIZONTAL_BUTTON_LEFT 3
int UI(int pid, unsigned int signal);
int UI_create_window(void (*callback)(int, int, int, int, int), int parent = 0, int zorder = 0);
int UI_create_window(int parent = 0, int zorder = 0);
void UI_set_layout_mode(int hwnd, int layout_mode);