tk: Add radio widget

Also fix an #include directive in the grid widget.

3 files changed, 127 insertions, 1 deletions

diff --git a/src/tk/grid.c b/src/tk/grid.c
index 8b6b99a..dc25f75 100644
--- a/src/tk/grid.c
+++ b/src/tk/grid.c
@@ -18,7 +18,7 @@
  */
 
 #include <SDL.h>
-#include "errno.h"
+#include <errno.h>
 #include <stdlib.h>
 #include <string.h>
 #include "../tk.h"
diff --git a/src/tk/local.mk b/src/tk/local.mk
index 679e2a4..9cea068 100644
--- a/src/tk/local.mk
+++ b/src/tk/local.mk
@@ -4,5 +4,6 @@ mazefight_SOURCES += \
 	%reldir%/check.c \
 	%reldir%/grid.c \
 	%reldir%/label.c \
+	%reldir%/radio.c \
 	%reldir%/widget.c \
 	%reldir%/widget.h
diff --git a/src/tk/radio.c b/src/tk/radio.c
new file mode 100644
index 0000000..fcf63b3
--- /dev/null
+++ b/src/tk/radio.c
@@ -0,0 +1,125 @@
+/*
+ * 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 <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include "../tk.h"
+#include "widget.h"
+
+struct mftk_radio {
+	struct mftk_widget   parent;
+	struct mftk_widget  *grid;
+	int                  state;
+	int                (*action)(void *, int);
+	void                *user_data;
+};
+
+static void
+_mftk_radio_layout(struct mftk_widget *w)
+{
+	struct mftk_radio *r = (struct mftk_radio *) w;
+
+	mftk_widget_layout(r->grid);
+	w->w = r->grid->w;
+	w->h = r->grid->h;
+}
+
+static int
+_mftk_radio_event(struct mftk_widget *w, SDL_Event *e, int x, int y)
+{
+	struct mftk_radio *r = (struct mftk_radio *) w;
+
+	return mftk_widget_event(r->grid, e, x, y);
+}
+
+static int
+_mftk_radio_render(struct mftk_widget *w, SDL_Renderer *renderer, int x, int y)
+{
+	struct mftk_radio *r = (struct mftk_radio *) w;
+
+	return mftk_widget_render(r->grid, renderer, x, y);
+}
+
+static void
+_mftk_radio_destroy(struct mftk_widget *w)
+{
+	struct mftk_radio *r = (struct mftk_radio *) w;
+
+	mftk_widget_destroy(&r->grid);
+}
+
+struct mftk_widget *
+mftk_radio_new(int butn_width, int butn_padding, SDL_Color *butn_color,
+		SDL_Color *mark_color, int label_padding, int item_padding,
+		TTF_Font *font, SDL_Color *text_color,
+		int (*action)(void *, int), void *user_data,
+		SDL_Renderer *renderer, int state, int options, ...)
+{
+	struct mftk_widget **children;
+	va_list              ap;
+	int                  i;
+	struct mftk_widget  *w;
+	struct mftk_radio   *r;
+
+	children = calloc(options, sizeof(*children));
+	if (children == NULL) {
+		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
+				"Couldn't create widget: %s",
+				strerror(errno));
+		return NULL;
+	}
+
+	va_start(ap, options);
+	for (i = 0; i < options; ++i) {
+		children[i] = mftk_check_new(butn_width, butn_padding,
+				butn_color, mark_color, (i == state),
+				label_padding, font, va_arg(ap, const char *),
+				text_color, NULL/*TODO*/, NULL/*TODO*/,
+				renderer);
+		if (children[i] == NULL) {
+			for (; i >= 0; --i) {
+				mftk_widget_destroy(&children[i]);
+			}
+			free(children);
+			va_end(ap);
+			return NULL;
+		}
+		mftk_check_set_shape(children[i], MFTK_CHECK_SHAPE_CIR);
+	}
+	va_end(ap);
+
+	mftk_widget_init(w, r, radio);
+
+	r->grid = mftk_grid_new_a(options, 1, item_padding, 0, children);
+	if (r->grid == NULL) {
+		for (i = 0; i < options; ++i) {
+			mftk_widget_destroy(&children[i]);
+		}
+		free(children);
+		free(r);
+	}
+
+	r->state     = state;
+	r->action    = action;
+	r->user_data = user_data;
+
+	return w;
+}