/* ===============================================================
*
* CUSTOM WIDGET
*
* ===============================================================*/
static int
ui_piemenu(struct nk_context *ctx, struct nk_vec2 pos, float radius,
struct nk_image *icons, int item_count)
{
int ret = -1;
struct nk_rect total_space;
struct nk_rect bounds;
int active_item = 0;
/* pie menu popup */
struct nk_color border = ctx->style.window.border_color;
struct nk_style_item background = ctx->style.window.fixed_background;
ctx->style.window.fixed_background = nk_style_item_hide();
ctx->style.window.border_color = nk_rgba(0,0,0,0);
total_space = nk_window_get_content_region(ctx);
ctx->style.window.spacing = nk_vec2(0,0);
ctx->style.window.padding = nk_vec2(0,0);
if (nk_popup_begin(ctx, NK_POPUP_STATIC, "piemenu", NK_WINDOW_NO_SCROLLBAR,
nk_rect(pos.x - total_space.x - radius, pos.y - radius - total_space.y,
2*radius,2*radius)))
{
int i = 0;
struct nk_command_buffer* out = nk_window_get_canvas(ctx);
const struct nk_input *in = &ctx->input;
total_space = nk_window_get_content_region(ctx);
ctx->style.window.spacing = nk_vec2(4,4);
ctx->style.window.padding = nk_vec2(8,8);
nk_layout_row_dynamic(ctx, total_space.h, 1);
nk_widget(&bounds, ctx);
/* outer circle */
nk_fill_circle(out, bounds, nk_rgb(50,50,50));
{
/* circle buttons */
float step = (2 * 3.141592654f) / (float)(MAX(1,item_count));
float a_min = 0; float a_max = step;
struct nk_vec2 center = nk_vec2(bounds.x + bounds.w / 2.0f, bounds.y + bounds.h / 2.0f);
struct nk_vec2 drag = nk_vec2(in->mouse.pos.x - center.x, in->mouse.pos.y - center.y);
float angle = (float)atan2(drag.y, drag.x);
if (angle < -0.0f) angle += 2.0f * 3.141592654f;
active_item = (int)(angle/step);
for (i = 0; i < item_count; ++i) {
struct nk_rect content;
float rx, ry, dx, dy, a;
nk_fill_arc(out, center.x, center.y, (bounds.w/2.0f),
a_min, a_max, (active_item == i) ? nk_rgb(45,100,255): nk_rgb(60,60,60));
/* separator line */
rx = bounds.w/2.0f; ry = 0;
dx = rx * (float)cos(a_min) - ry * (float)sin(a_min);
dy = rx * (float)sin(a_min) + ry * (float)cos(a_min);
nk_stroke_line(out, center.x, center.y,
center.x + dx, center.y + dy, 1.0f, nk_rgb(50,50,50));
/* button content */
a = a_min + (a_max - a_min)/2.0f;
rx = bounds.w/2.5f; ry = 0;
content.w = 30; content.h = 30;
content.x = center.x + ((rx * (float)cos(a) - ry * (float)sin(a)) - content.w/2.0f);
content.y = center.y + (rx * (float)sin(a) + ry * (float)cos(a) - content.h/2.0f);
nk_draw_image(out, content, &icons[i], nk_rgb(255,255,255));
a_min = a_max; a_max += step;
}
}
{
/* inner circle */
struct nk_rect inner;
inner.x = bounds.x + bounds.w/2 - bounds.w/4;
inner.y = bounds.y + bounds.h/2 - bounds.h/4;
inner.w = bounds.w/2; inner.h = bounds.h/2;
nk_fill_circle(out, inner, nk_rgb(45,45,45));
/* active icon content */
bounds.w = inner.w / 2.0f;
bounds.h = inner.h / 2.0f;
bounds.x = inner.x + inner.w/2 - bounds.w/2;
bounds.y = inner.y + inner.h/2 - bounds.h/2;
nk_draw_image(out, bounds, &icons[active_item], nk_rgb(255,255,255));
}
nk_layout_space_end(ctx);
if (!nk_input_is_mouse_down(&ctx->input, NK_BUTTON_RIGHT)) {
nk_popup_close(ctx);
ret = active_item;
}
} else ret = -2;
ctx->style.window.spacing = nk_vec2(4,4);
ctx->style.window.padding = nk_vec2(8,8);
nk_popup_end(ctx);
ctx->style.window.fixed_background = background;
ctx->style.window.border_color = border;
return ret;
}
int main(int argc, char *argv[]) {
/* register callbacks */
mpx_register_vc(&this_vc);
/* GUI */
static struct nk_context ctx;
static struct nk_canvas canvas;
uint32_t width = 0,
height = 0;
static struct nk_user_font font;
font.userdata.ptr = &width;
font.height = font_vga_8x16.height;
font.width = your_text_width_calculation;
nk_init_default(&ctx, &font);
width = this_vc.fb->var.xres;
height = this_vc.fb->var.yres;
/* Draw */
while (1)
{
/* what to draw */
canvas_begin(&ctx, &canvas, 0, 0, 0, width, height, nk_rgb(100,100,100));
{
canvas.painter->use_clipping = NK_CLIPPING_OFF;
nk_fill_rect(canvas.painter, nk_rect(15,15,140,140), 5, nk_rgb(247, 230, 154));
nk_fill_rect(canvas.painter, nk_rect(20,20,135,135), 5, nk_rgb(188, 174, 118));
nk_draw_text(canvas.painter, nk_rect(30, 30, 100, 20), "Text to draw", 12, &font, nk_rgb(188,174,118), nk_rgb(0,0,0));
nk_fill_rect(canvas.painter, nk_rect(160,20,70,70), 0, nk_rgb(0,0,255));
nk_fill_circle(canvas.painter, nk_rect(20,160,60,60), nk_rgb(255,0,0));
nk_fill_triangle(canvas.painter, 160, 160, 230, 160, 195, 220, nk_rgb(0,255,0));
nk_fill_arc(canvas.painter, 195, 120, 30, 0, 3.141592654f * 3.0f / 4.0f, nk_rgb(255,255,0));
nk_stroke_line(canvas.painter, 15, 10, 100, 10, 2.0f, nk_rgb(189,45,75));
nk_stroke_rect(canvas.painter, nk_rect(235, 20, 70, 70), 10, 3, nk_rgb(0,0,255));
nk_stroke_curve(canvas.painter, 235, 130, 252, 170, 288, 80, 305, 130, 1, nk_rgb(0,150,220));
nk_stroke_triangle(canvas.painter, 235, 160, 305, 160, 270, 220, 10, nk_rgb(255,0,143));
nk_stroke_circle(canvas.painter, nk_rect(90, 160, 60, 60), 2, nk_rgb(0,255,120));
/* load some image */
// uint32_t im_w, im_h, im_format;
// images[0] = stbi_load("SPBGU_logo.png", &im_w, &im_h, &im_format, 0);
// if (images[0] == NULL)
// printf("\nstbi_load doesn't work. :(\n");
// else {
// printf("\nLoaded image: id = %i width = %i\theight = %i\tformat = %i", (int)*images[0], im_w, im_h, im_format);
struct nk_image im;
im.handle.ptr = "SPBGU_logo.png";
im.handle.id = 0;
im.w = 0;
im.h = 0;
im.region[0] = 0;
im.region[1] = 0;
im.region[2] = 267;
im.region[3] = 333;
nk_draw_image(canvas.painter, nk_rect(320, 10, 130, 150), &im, nk_rgb(100, 0, 0));
// }
// stbi_image_free(images[0]);
}
canvas_end(&ctx, &canvas);
/* Draw each element */
draw(&this_vc, &ctx, width, height);
}
nk_free(&ctx);
printf("\nEnd of program.\nIf you see it then something goes wrong.\n");
return 0;
}
