From 31e006b69ff5ab6e0cd4c23012efaf3f72b53015 Mon Sep 17 00:00:00 2001
From: Linus Probert <linus.probert@gmail.com>
Date: Fri, 9 Feb 2018 06:53:06 +0100
Subject: [PATCH] Working on menus. Still pretty broken game.

---
 CMakeLists.txt   |  1 +
 src/collisions.c |  8 ++++++++
 src/collisions.h | 12 ++++++++++++
 src/gui_button.c | 20 ++++++++------------
 src/menu.c       | 38 ++++++++++++++++++++++++++++++++------
 5 files changed, 61 insertions(+), 18 deletions(-)
 create mode 100644 src/collisions.c
 create mode 100644 src/collisions.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d09ece2..9ca1cb6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,6 +72,7 @@ add_executable(breakhack
 	src/gui_button
 	src/particle_engine
 	src/menu
+	src/collisions
 	)
 
 target_link_libraries(breakhack
diff --git a/src/collisions.c b/src/collisions.c
new file mode 100644
index 0000000..72777dc
--- /dev/null
+++ b/src/collisions.c
@@ -0,0 +1,8 @@
+#include "collisions.h"
+
+bool
+position_in_rect(Position *p, SDL_Rect *r)
+{
+	return r->x <= p->x && r->x + r->w >= p->x &&
+		r->y <= p->y && r->y + r->h >= p->y;
+}
diff --git a/src/collisions.h b/src/collisions.h
new file mode 100644
index 0000000..02ff9cf
--- /dev/null
+++ b/src/collisions.h
@@ -0,0 +1,12 @@
+#ifndef COLLISIONS_H_
+#define	COLLISIONS_H_
+
+#include <SDL2/SDL.h>
+#include <stdbool.h>
+
+#include "position.h"
+
+bool
+position_in_rect(Position*, SDL_Rect*);
+
+#endif // COLLISIONS_H_
diff --git a/src/gui_button.c b/src/gui_button.c
index 676d7c5..bd691c2 100644
--- a/src/gui_button.c
+++ b/src/gui_button.c
@@ -1,6 +1,7 @@
 #include <stdlib.h>
 #include "util.h"
 #include "gui_button.h"
+#include "collisions.h"
 
 GuiButton *
 gui_button_create(SDL_Rect area, void (*event)(void*), void *usrdata)
@@ -16,26 +17,21 @@ gui_button_create(SDL_Rect area, void (*event)(void*), void *usrdata)
 void
 gui_button_check_pointer(GuiButton *button, Pointer *pointer)
 {
-	SDL_Rect *r = &button->area;
-	Position *p = &pointer->sprite->pos;
-
-	button->hover = r->x <= p->x && r->x + r->w >= p->x &&
-		r->y <= p->y && r->y + r->h >= p->y;
-
+	button->hover = position_in_rect(&pointer->sprite->pos, &button->area);
 	pointer_toggle_clickable_pointer(pointer, button->hover);
 }
 
 void
 gui_button_handle_event(GuiButton *button, SDL_Event *event)
 {
-	if (event->type != SDL_MOUSEBUTTONDOWN)
-		return;
+	if (event->type == SDL_MOUSEBUTTONDOWN) {
 
-	if (event->button.button != SDL_BUTTON_LEFT)
-		return;
+		if (event->button.button != SDL_BUTTON_LEFT)
+			return;
 
-	if (button->hover)
-		button->event(button->usrdata);
+		if (button->hover)
+			button->event(button->usrdata);
+	}
 }
 
 void
diff --git a/src/menu.c b/src/menu.c
index c20beee..150a0a6 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -3,12 +3,13 @@
 #include "util.h"
 #include "sprite.h"
 #include "defines.h"
+#include "gui_button.h"
 
 typedef struct MenuItems_t {
 	Sprite *sprite;
 	Sprite *hsprite;
+	GuiButton *button;
 	bool selected;
-	void (*onClick)(void);
 } MenuItem;
 
 Menu *
@@ -23,11 +24,22 @@ menu_create(void)
 void
 menu_handle_event(Menu *m, SDL_Event *event)
 {
+	UNUSED(m);
+	LinkedList *items;
+
 	if (event->type != SDL_KEYDOWN && event->type != SDL_MOUSEMOTION) {
 		return;
 	}
-	error("Menu events need implementation still");
-	UNUSED(m);
+
+	items = m->items;
+	if (event->type == SDL_MOUSEMOTION) {
+		while (items) {
+			MenuItem *item = items->data;
+			items = items->next;
+			gui_button_handle_event(item->button, event);
+			item->selected = item->button->hover;
+		}
+	}
 }
 
 void
@@ -37,7 +49,14 @@ menu_item_add(Menu *m, Sprite *s1, Sprite *s2)
 	item->sprite = s1;
 	item->hsprite = s2;
 	item->selected = false;
-	item->onClick = NULL;
+
+	SDL_Rect area = {
+		item->sprite->pos.x,
+		item->sprite->pos.y,
+		item->sprite->textures[0]->dim.width,
+		item->sprite->textures[0]->dim.height
+	};
+	item->button = gui_button_create(area, NULL, NULL);
 	linkedlist_append(&m->items, item);
 }
 
@@ -48,7 +67,10 @@ menu_render(Menu *m, Camera *cam)
 
 	while (items) {
 		MenuItem *item = items->data;
-		sprite_render(item->sprite, cam);
+		if (item->selected)
+			sprite_render(item->hsprite, cam);
+		else
+			sprite_render(item->sprite, cam);
 		items = items->next;
 	}
 }
@@ -56,7 +78,11 @@ menu_render(Menu *m, Camera *cam)
 static void
 menu_item_destroy(MenuItem *item)
 {
-	sprite_destroy(item->sprite);
+	if (item->sprite)
+		sprite_destroy(item->sprite);
+	if (item->hsprite)
+		sprite_destroy(item->hsprite);
+	gui_button_destroy(item->button);
 	free(item);
 }