static void hat_widget(struct nk_context* nk, unsigned char state) { float radius; struct nk_rect area; struct nk_vec2 center; if (nk_widget(&area, nk) != NK_WIDGET_VALID) return; center = nk_vec2(area.x + area.w / 2.f, area.y + area.h / 2.f); radius = NK_MIN(area.w, area.h) / 2.f; nk_stroke_circle(nk_window_get_canvas(nk), nk_rect(center.x - radius, center.y - radius, radius * 2.f, radius * 2.f), 1.f, nk_rgb(175, 175, 175)); if (state) { const float angles[] = { 0.f, 0.f, NK_PI * 1.5f, NK_PI * 1.75f, NK_PI, 0.f, NK_PI * 1.25f, 0.f, NK_PI * 0.5f, NK_PI * 0.25f, 0.f, 0.f, NK_PI * 0.75f, 0.f, }; const float cosa = nk_cos(angles[state]); const float sina = nk_sin(angles[state]); const struct nk_vec2 p0 = nk_vec2(0.f, -radius); const struct nk_vec2 p1 = nk_vec2( radius / 2.f, -radius / 3.f); const struct nk_vec2 p2 = nk_vec2(-radius / 2.f, -radius / 3.f); nk_fill_triangle(nk_window_get_canvas(nk), center.x + cosa * p0.x + sina * p0.y, center.y + cosa * p0.y - sina * p0.x, center.x + cosa * p1.x + sina * p1.y, center.y + cosa * p1.y - sina * p1.x, center.x + cosa * p2.x + sina * p2.y, center.y + cosa * p2.y - sina * p2.x, nk_rgb(175, 175, 175)); } }
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; }