Implemented a button. Not quite usable yet though.

CMakeLists.txt

@@ -35,7 +35,12 @@ if (NOT WIN32)
 endif (NOT WIN32)
 
 if (NOT WIN32)
-	add_definitions("-std=gnu11 -pedantic -Wall -Wextra -Wshadow -Wpointer-arith -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes")
+	add_definitions(-std=gnu11
+		-pedantic -Wall -Wextra -Wshadow
+		-Wpointer-arith -Wcast-qual
+		-Wstrict-prototypes
+		-Wmissing-prototypes
+		)
 endif (NOT WIN32)
 
 # PROGRAMS:
@@ -62,6 +67,7 @@ add_executable(breakhack
 	src/item
 	src/item_builder
 	src/pointer
+	src/gui_button
 	)
 
 target_link_libraries(breakhack

src/gui_button.c

@@ -0,0 +1,31 @@
+#include <stdlib.h>
+#include "util.h"
+#include "gui_button.h"
+
+GuiButton *
+gui_button_create(SDL_Rect area)
+{
+	GuiButton *button = ec_malloc(sizeof(GuiButton));
+	button->area = area;
+	button->hover = false;
+	return button;
+}
+
+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;
+
+	if (button->hover)
+		debug("Pointer is over button");
+}
+
+void
+gui_button_destroy(GuiButton *button)
+{
+	free(button);
+}

src/gui_button.h

@@ -0,0 +1,24 @@
+#ifndef GUI_BUTTON_H_
+#define	GUI_BUTTON_H_
+
+#include <SDL2/SDL.h>
+#include "pointer.h"
+#include "sprite.h"
+#include "linkedlist.h"
+#include "camera.h"
+
+typedef struct GuiButton_t {
+	SDL_Rect area;
+	bool hover;
+} GuiButton;
+
+GuiButton *
+gui_button_create(SDL_Rect);
+
+void
+gui_button_check_pointer(GuiButton*, Pointer*);
+
+void
+gui_button_destroy(GuiButton*);
+
+#endif // GUI_BUTTON_H_

src/main.c

@@ -17,6 +17,7 @@
 #include "util.h"
 #include "item_builder.h"
 #include "pointer.h"
+#include "gui_button.h"
 
 static SDL_Window	*gWindow	= NULL;
 static SDL_Renderer	*gRenderer	= NULL;
@@ -25,6 +26,7 @@ static Map		*gMap		= NULL;
 static RoomMatrix	*gRoomMatrix	= NULL;
 static Gui		*gGui		= NULL;
 static Pointer		*gPointer	= NULL;
+static GuiButton	*gButton	= NULL;
 static unsigned int	cLevel		= 1;
 static double		renderScale	= 1.0;
 static GameState	gGameState;
@@ -134,6 +136,7 @@ bool init(void)
 		gGui = gui_create(gRenderer);
 		item_builder_init(gRenderer);
 		gPointer = pointer_create(gRenderer);
+		gButton = gui_button_create((SDL_Rect) { 100, 100, 100, 100 });
 	}
 
 	gGameState = PLAYING;
@@ -165,6 +168,9 @@ bool handle_events(void)
 		}
 		pointer_handle_event(gPointer, &event);
 	}
+
+	gui_button_check_pointer(gButton, gPointer);
+
 	return quit;
 }
 
@@ -292,6 +298,7 @@ void close(void)
 	roommatrix_destroy(gRoomMatrix);
 	gui_destroy(gGui);
 	pointer_destroy(gPointer);
+	gui_button_destroy(gButton);
 	item_builder_close();
 	SDL_DestroyRenderer(gRenderer);
 	SDL_DestroyWindow(gWindow);