command iterator

test/main.c

@@ -213,25 +213,24 @@ int main(void)
 		// fill background
 		SDL_SetRenderDrawColor(r, 0, 0, 0, 0xff);
 		SDL_RenderClear(r);
-		for (int i = 0; i < ctx->cmd_stack.idx; i++) {
-			ug_cmd_t cmd = ctx->cmd_stack.items[i];
-			switch (cmd.type) {
+		for (ug_cmd_t *cmd = NULL; (cmd = ug_cmd_next(ctx));) {
+			switch (cmd->type) {
 			case UG_CMD_RECT:
 				{
-				ug_color_t col = cmd.rect.color;
+				ug_color_t col = cmd->rect.color;
 				SDL_Rect sr = {
-					.x = cmd.rect.x,
-					.y = cmd.rect.y,
-					.w = cmd.rect.w,
-					.h = cmd.rect.h,
+					.x = cmd->rect.x,
+					.y = cmd->rect.y,
+					.w = cmd->rect.w,
+					.h = cmd->rect.h,
 				};
 				SDL_SetRenderDrawColor(r, col.r, col.g, col.b, col.a);
 				SDL_RenderFillRect(r, &sr);
 				}
 				break;
 			case UG_CMD_TEXT:
-			SDL_SetRenderDrawColor(r, cmd.text.color.r, cmd.text.color.g, cmd.text.color.b, cmd.text.color.a);
-				STBTTF_RenderText(r, font, cmd.text.x, cmd.text.y, cmd.text.str);
+			SDL_SetRenderDrawColor(r, cmd->text.color.r, cmd->text.color.g, cmd->text.color.b, cmd->text.color.a);
+				STBTTF_RenderText(r, font, cmd->text.x, cmd->text.y, cmd->text.str);
 				break;
 			default: break;
 			}

ugui.c

@@ -203,6 +203,16 @@ static void push_text_command(ug_ctx_t *ctx, ug_vec2_t pos, int size, ug_color_t
 }
 
 
+ug_cmd_t *ug_cmd_next(ug_ctx_t *ctx)
+{
+	if(!ctx)
+		return NULL;
+	if (ctx->cmd_it < ctx->cmd_stack.idx)
+		return &ctx->cmd_stack.items[ctx->cmd_it++];
+	return NULL;
+}
+
+
 /*=============================================================================*
  *                          Context Operations                                 *
  *=============================================================================*/
@@ -634,7 +644,7 @@ static void draw_container(ug_ctx_t *ctx, ug_container_t *cnt, const char *text)
 			// TODO: center the text horizontally
 			push_text_command(ctx,
 			                 (ug_vec2_t){.x = draw_rect.x + bl,
-					             .y = draw_rect.y + bt + ts},
+					             .y = draw_rect.y + bt + ts/2},
 					 ts, s->text.color, text);
 		}
 	}
@@ -960,5 +970,7 @@ int ug_frame_end(ug_ctx_t *ctx)
 
 	ctx->frame++;
 
+	ctx->cmd_it = 0;
+
 	return 0;
 }

ugui.h

@@ -172,6 +172,8 @@ typedef struct {
 	struct {
 		ug_id_t cnt, elem;
 	} last_active;
+	// id of the selected container, used for layout
+	ug_id_t selected_cnt;
 	// count the frames for fun
 	unsigned long int frame;
 	// mouse data