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#include "yasl/yasl.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
static bool running = true;
static int mouse_x = -1;
static int mouse_y = -1;
static bool mouse_down = false;
static int color_theme = 0;
static uint16_t pen_pressure = 0;
static int8_t pen_tilt_x = 0;
static int8_t pen_tilt_y = 0;
static enum yasl_pointer_device pointer_device = YASL_PTR_DEV_MOUSE;
static const char *device_name(enum yasl_pointer_device dev)
{
switch (dev) {
case YASL_PTR_DEV_PEN: return "Pen/Stylus";
case YASL_PTR_DEV_ERASER: return "Eraser";
case YASL_PTR_DEV_TOUCH: return "Touch";
default: return "Mouse";
}
}
static void on_draw(struct yasl_surface *s, struct yasl_frame *frame, void *ud)
{
(void)ud;
int w = frame->target.size.x;
int h = frame->target.size.y;
uint32_t *pixels = frame->target.pixels;
if (!pixels || w <= 0 || h <= 0)
return;
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x++) {
uint8_t r, g, b;
uint8_t u = (uint8_t)((x * 255) / (w > 0 ? w : 1));
uint8_t v = (uint8_t)((y * 255) / (h > 0 ? h : 1));
switch (color_theme % 3) {
case 0:
r = u;
g = v;
b = 160;
break;
case 1:
r = 40;
g = u;
b = v;
break;
default:
r = v;
g = 60;
b = u;
break;
}
/* Draw interactive pointer / stylus indicator */
if (mouse_x >= 0 && mouse_y >= 0) {
int dx = x - mouse_x;
int dy = y - mouse_y;
int dist_sq = dx * dx + dy * dy;
/* Pressure-sensitive radius: scales dynamically from 8px to 64px */
int radius;
if (pen_pressure > 0) {
radius = 8 + (int)(((uint32_t)pen_pressure * 56) / 65535);
} else {
radius = mouse_down ? 36 : 18;
}
if (dist_sq < radius * radius) {
r = (uint8_t)(255 - r / 2);
g = (uint8_t)(255 - g / 2);
b = (uint8_t)(255 - b / 2);
}
}
pixels[y * w + x] = (255u << 24) | ((uint32_t)r << 16) | ((uint32_t)g << 8) | b;
}
}
struct yasl_damage_list dmg = { .n = -1 };
yasl_surface_present(s, &frame->target, &dmg);
}
static void on_configure(struct yasl_surface *s, struct yasl_geometry geo, void *ud)
{
(void)ud;
printf("[YASL] Resized to %dx%d (scale: %.2fx)\n",
geo.size.x, geo.size.y, (double)geo.scale_120 / YASL_SCALE_UNIT);
yasl_surface_schedule_redraw(s);
}
static void on_close(struct yasl_surface *s, void *ud)
{
(void)s;
(void)ud;
printf("[YASL] Window close requested\n");
running = false;
}
static void on_quit(void *ud)
{
(void)ud;
running = false;
}
int main(void)
{
struct yasl_display_cbs disp_cbs = { .quit = on_quit };
struct yasl_display_spec disp_spec = {
.app_id = "org.yasl.example",
.cbs = &disp_cbs,
};
struct yasl_display *d = yasl_display_open(NULL, &disp_spec);
if (!d) {
fprintf(stderr, "Failed to open display\n");
return 1;
}
struct yasl_surface_spec surf_spec = {
.title = "YASL Interactive Window (Pen & Touch Enabled)",
.size = { .x = 640, .y = 480 },
};
struct yasl_surface *s = yasl_surface_create_toplevel(d, &surf_spec);
if (!s) {
fprintf(stderr, "Failed to create surface\n");
yasl_display_close(d);
return 1;
}
struct yasl_surface_cbs surf_cbs = {
.draw = on_draw,
.configure = on_configure,
.close = on_close,
};
yasl_surface_set_callbacks(s, &surf_cbs, NULL);
yasl_surface_schedule_redraw(s);
printf("=== YASL Demo Running ===\n");
printf(" - Stylus/Pen: full pressure (0..65535) and tilt detection\n");
printf(" - Mouse/Touch: interactive click/motion highlights\n");
printf(" - Space: cycle background themes\n");
printf(" - Escape: exit\n\n");
while (running) {
yasl_display_dispatch(d, -1);
struct yasl_input_event ev;
while (yasl_surface_input_poll(s, &ev)) {
if (ev.kind == YASL_INPUT_KEY) {
if (ev.key.action == YASL_KEY_PRESS) {
if (ev.key.key == YASL_KEY_ESCAPE) { /* Escape */
running = false;
} else if (ev.key.key == YASL_KEY_SPACE || ev.key.key == YASL_KEY_ENTER) { /* Space or Return */
color_theme++;
yasl_surface_schedule_redraw(s);
}
}
} else if (ev.kind == YASL_INPUT_MOUSE) {
mouse_x = ev.mouse.pos.x;
mouse_y = ev.mouse.pos.y;
pen_pressure = ev.mouse.pen.pressure;
pen_tilt_x = ev.mouse.pen.tilt_x;
pen_tilt_y = ev.mouse.pen.tilt_y;
pointer_device = ev.mouse.device;
if (ev.mouse.kind == YASL_PTR_PRESS) {
mouse_down = true;
if (pen_pressure > 0 || pointer_device == YASL_PTR_DEV_PEN) {
printf("[Pen Down] Pressure: %5u/65535 (%.1f%%) | Tilt: (%+3d°, %+3d°) | Device: %s\n",
pen_pressure, (pen_pressure * 100.0) / 65535.0,
pen_tilt_x, pen_tilt_y, device_name(pointer_device));
}
} else if (ev.mouse.kind == YASL_PTR_RELEASE) {
mouse_down = false;
pen_pressure = 0;
} else if (ev.mouse.kind == YASL_PTR_MOTION && pen_pressure > 0) {
printf("[Pen Move] Pressure: %5u/65535 (%.1f%%) | Tilt: (%+3d°, %+3d°) | Device: %s\n",
pen_pressure, (pen_pressure * 100.0) / 65535.0,
pen_tilt_x, pen_tilt_y, device_name(pointer_device));
} else if (ev.mouse.kind == YASL_PTR_LEAVE) {
mouse_x = -1;
mouse_y = -1;
mouse_down = false;
pen_pressure = 0;
}
yasl_surface_schedule_redraw(s);
}
}
yasl_display_flush(d);
}
yasl_surface_destroy(s);
yasl_display_close(d);
return 0;
}
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