From 41829434c29da9cb1d59654bca7c02016dbd4d85 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Thu, 05 Aug 2021 00:29:01 -0400
Subject: tk: Add check widget

---
(limited to 'src/tk/check.c')

diff --git a/src/tk/check.c b/src/tk/check.c
new file mode 100644
index 0000000..b5f91b8
--- /dev/null
+++ b/src/tk/check.c
@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2021  P. J. McDermott
+ *
+ * This file is part of Maze Fight
+ *
+ * Maze Fight is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Maze Fight is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Maze Fight.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <SDL.h>
+#include "../tk.h"
+#include "widget.h"
+
+struct mftk_check {
+	struct mftk_widget   parent;
+	int                  butn_width;
+	int                  butn_padding;
+	SDL_Color           *butn_color;
+	SDL_Color           *mark_color;
+	int                  state;
+	int                  label_padding;
+	struct mftk_widget  *label;
+	int                (*action)(void *, int);
+	void                *user_data;
+};
+
+static void
+_mftk_check_layout(struct mftk_widget *w)
+{
+	struct mftk_check *c = (struct mftk_check *) w;
+
+	mftk_widget_layout(c->label);
+
+	w->w = c->butn_width;
+	if (c->label != NULL) {
+		w->w += c->label_padding + c->label->w;
+	}
+	w->h = c->butn_width;
+	if (c->label != NULL && c->label->h > w->h) {
+		w->h = c->label->h;
+	}
+}
+
+static int
+_mftk_check_event(struct mftk_widget *w, SDL_Event *e,
+		int x __attribute__((__unused__)),
+		int y __attribute__((__unused__)))
+{
+	struct mftk_check *c = (struct mftk_check *) w;
+
+	switch (e->type) {
+		case SDL_MOUSEBUTTONUP:
+			if (e->button.button == SDL_BUTTON_LEFT) {
+				c->state = !c->state;
+				return c->action(c->user_data, c->state);
+			}
+			break;
+		default:
+			break;
+	}
+
+	return 0;
+}
+
+static int
+_mftk_check_render(struct mftk_widget *w, SDL_Renderer *renderer, int x, int y)
+{
+	struct mftk_check *c = (struct mftk_check *) w;
+	SDL_Rect           rect;
+
+	rect.x = x;
+	rect.y = y;
+	rect.w = c->butn_width;
+	rect.h = c->butn_width;
+	if (SDL_SetRenderDrawColor(renderer,
+				c->butn_color->r, c->butn_color->g,
+				c->butn_color->b, c->butn_color->a) < 0 ||
+			SDL_RenderFillRect(renderer, &rect) < 0) {
+		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
+				"Couldn't render widget: %s",
+				SDL_GetError());
+		return -1;
+	}
+
+	if (c->state == SDL_TRUE) {
+		rect.x += c->butn_padding;
+		rect.y += c->butn_padding;
+		rect.w -= c->butn_padding * 2;
+		rect.h -= c->butn_padding * 2;
+		if (SDL_SetRenderDrawColor(renderer,
+					c->mark_color->r, c->mark_color->g,
+					c->mark_color->b, c->mark_color->a) < 0
+				|| SDL_RenderFillRect(renderer, &rect) < 0) {
+			SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
+					"Couldn't render widget: %s",
+					SDL_GetError());
+			return -1;
+		}
+	}
+
+	if (c->label != NULL && mftk_widget_render(c->label, renderer,
+				x + c->butn_width + c->label_padding, y) < 0) {
+		return -1;
+	}
+
+	return 0;
+}
+
+static void
+_mftk_check_destroy(struct mftk_widget *w)
+{
+	struct mftk_check *c = (struct mftk_check *) w;
+
+	if (c->label != NULL) {
+		mftk_widget_destroy(&c->label);
+	}
+}
+
+struct mftk_widget *
+mftk_check_new(int butn_width, int butn_padding, SDL_Color *butn_color,
+		SDL_Color *mark_color, int state, int label_padding,
+		TTF_Font *font, const char *text, SDL_Color *text_color,
+		int (*action)(void *, int), void *user_data,
+		SDL_Renderer *renderer)
+{
+	struct mftk_widget *w;
+	struct mftk_check  *c;
+
+	mftk_widget_init(w, c, check);
+
+	if (font != NULL && text != NULL && text_color != NULL) {
+		c->label = mftk_label_new(font, text, text_color, renderer);
+		if (c->label == NULL) {
+			free(c);
+			return NULL;
+		}
+	}
+
+	c->butn_width    = butn_width;
+	c->butn_padding  = butn_padding;
+	c->butn_color    = butn_color;
+	c->mark_color    = mark_color;
+	c->state         = state;
+	c->label_padding = label_padding;
+	c->action        = action;
+	c->user_data     = user_data;
+
+	return w;
+}
--
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