From ff4f77ec223c5a0b1a015789d34177d8ddb4a4b2 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 06 Aug 2021 01:55:22 -0400
Subject: tk: Add container pointer to widget

---
diff --git a/src/tk/box.c b/src/tk/box.c
index ced5b3c..10a4ec3 100644
--- a/src/tk/box.c
+++ b/src/tk/box.c
@@ -132,5 +132,7 @@ mftk_box_new(int container_w, int container_h, int own_w, int own_h,
 	b->bg_color    = bg_color;
 	b->child       = child;
 
+	child->container = w;
+
 	return w;
 }
diff --git a/src/tk/grid.c b/src/tk/grid.c
index 62c5612..9d12b3c 100644
--- a/src/tk/grid.c
+++ b/src/tk/grid.c
@@ -229,6 +229,7 @@ mftk_grid_new_a(int rows, int cols, int row_spacing, int col_spacing,
 {
 	struct mftk_widget *w;
 	struct mftk_grid   *g;
+	int                 i;
 
 	mftk_widget_init(w, g, grid);
 
@@ -259,6 +260,10 @@ mftk_grid_new_a(int rows, int cols, int row_spacing, int col_spacing,
 	g->children    = children;
 	g->alignments  = alignments;
 
+	for (i = 0; i < rows * cols; ++i) {
+		children[i]->container = w;
+	}
+
 	return w;
 }
 
diff --git a/src/tk/widget.h b/src/tk/widget.h
index 310dc56..64b8b58 100644
--- a/src/tk/widget.h
+++ b/src/tk/widget.h
@@ -24,14 +24,17 @@
 #include <stdarg.h>
 
 struct mftk_widget {
-	int    w;
-	int    h;
-	int    vis;
-	int    can_focus;
-	void (*layout)(struct mftk_widget *);
-	int  (*event)(struct mftk_widget *, SDL_Event *, int, int);
-	int  (*render)(struct mftk_widget *, SDL_Renderer *, int, int);
-	void (*destroy)(struct mftk_widget *);
+	int                  w;
+	int                  h;
+	struct mftk_widget  *container;
+	int                  vis;
+	int                  can_focus;
+	void               (*layout)(struct mftk_widget *);
+	int                (*event)(struct mftk_widget *, SDL_Event *,
+			int, int);
+	int                (*render)(struct mftk_widget *, SDL_Renderer *,
+			int, int);
+	void               (*destroy)(struct mftk_widget *);
 };
 
 struct mftk_widget *
--
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