tk: Add box widget

2 files changed, 120 insertions, 0 deletions

diff --git a/src/tk/box.c b/src/tk/box.c
new file mode 100644
index 0000000..1a45589
--- /dev/null
+++ b/src/tk/box.c
@@ -0,0 +1,119 @@
+/*
+ * 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_box {
+	struct mftk_widget  parent;
+	int                 container_w;
+	int                 container_h;
+	int                 padding;
+	SDL_Color          *bg_color;
+	struct mftk_widget *child;
+	int                 child_x;
+	int                 child_y;
+};
+
+static void
+_mftk_box_layout(struct mftk_widget *w)
+{
+	struct mftk_box *b = (struct mftk_box *) w;
+
+	mftk_widget_layout(b->child);
+	if (w->w == 0) {
+		w->w = b->child->w + b->padding * 2;
+	}
+	if (w->h == 0) {
+		w->h = b->child->h + b->padding * 2;
+	}
+	b->child_x = (b->container_w - w->w) / 2 + b->padding;
+	b->child_y = (b->container_h - w->h) / 2 + b->padding;
+}
+
+static int
+_mftk_box_event(struct mftk_widget *w, SDL_Event *e, int x, int y)
+{
+	struct mftk_box   *b = (struct mftk_box *) w;
+	SDL_Point          p;
+	SDL_Rect           rect;
+
+	switch (e->type) {
+		case SDL_MOUSEBUTTONUP:
+			p.x = e->button.x;
+			p.y = e->button.y;
+			rect.x = x + b->child_x;
+			rect.y = y + b->child_y;
+			rect.w = b->child->w;
+			rect.h = b->child->h;
+			if (SDL_PointInRect(&p, &rect) == SDL_TRUE) {
+				return mftk_widget_event(b->child, e, x, y);
+			}
+			break;
+		default:
+			break;
+	}
+
+	return 0;
+}
+
+static int
+_mftk_box_render(struct mftk_widget *w, SDL_Renderer *renderer, int x, int y)
+{
+	struct mftk_box *b = (struct mftk_box *) w;
+
+	if (mftk_widget_render(b->child, renderer,
+				x + b->child_x, y + b->child_y) < 0) {
+		return -1;
+	}
+
+	return 0;
+}
+
+static void
+_mftk_box_destroy(struct mftk_widget *w)
+{
+	struct mftk_box *b = (struct mftk_box *) w;
+
+	mftk_widget_destroy(&b->child);
+}
+
+struct mftk_widget *
+mftk_box_new(int container_w, int container_h, int own_w, int own_h,
+		int padding, SDL_Color *bg_color, struct mftk_widget *child)
+{
+	struct mftk_widget *w;
+	struct mftk_box    *b;
+
+	mftk_widget_init(w, b, box);
+
+	b->container_w = container_w;
+	b->container_h = container_h;
+	w->w           = own_w;
+	w->h           = own_h;
+	b->padding     = padding;
+	b->bg_color    = bg_color;
+	b->child       = child;
+
+	return w;
+}
diff --git a/src/tk/local.mk b/src/tk/local.mk
index a15bd33..12c07d7 100644
--- a/src/tk/local.mk
+++ b/src/tk/local.mk
@@ -1,4 +1,5 @@
 mazefight_SOURCES += \
+	%reldir%/box.c \
 	%reldir%/button.c \
 	%reldir%/grid.c \
 	%reldir%/label.c \