Buildable, started an example

Makefile

@@ -1,10 +1,15 @@
-OBJS=menu.oo main.oo
+OBJS=menu.oo main.oo utils.oo
 
 all: menu
 
 %.oo: %.cpp
-	g++ -c `sdl-config --cflags` -o $@ $<
+	g++ -Wall -g -c `sdl-config --cflags` -o $@ $<
 
+menu.oo: menu.cpp menu.hh utils.hh Makefile
+
+utils.oo: utils.cpp utils.hh Makefile
+
+main.oo: menu.hh utils.hh Makefile
 
 menu: $(OBJS)
 	g++ `sdl-config --libs` -lSDL -lSDL_image -lSDL_ttf -o $@ $+

main.cpp

@@ -1,6 +1,62 @@
 #include "menu.hh"
+#include "utils.hh"
+
+class PrintMenu : public Menu
+{
+public:
+	PrintMenu(TTF_Font *font) : Menu(font)
+	{
+	}
+
+	virtual void selectCallback(int which)
+	{
+		printf("entry %d selected: %s\n", which, this->pp_msgs[which]);
+	}
+
+	virtual void escapeCallback(int which)
+	{
+		printf("entry %d escaped: %s\n", which, this->pp_msgs[which]);
+	}
+};
+
+SDL_Surface *screen;
+PrintMenu *g_menu;
+
+static void run(void)
+{
+	while(1)
+	{
+		SDL_Event ev;
+	        while (SDL_PollEvent(&ev)) {
+	        	if (ev.type == SDL_QUIT)
+	                	exit(1); break;
+
+	        	g_menu->pushEvent(&ev); break;
+	        }
+	        g_menu->draw(screen, 0, 80, 400, 400);
+
+		SDL_Delay(50);
+	}
+}
+
+static void init(void)
+{
+	TTF_Font *fnt;
+
+	screen = SDL_SetVideoMode(640, 480, 16,
+			SDL_DOUBLEBUF);
+	panic_if(!screen, "Cannot initialize video: %s\n", SDL_GetError());
+	TTF_Init();
+
+
+	fnt = read_and_alloc_font("font.ttf");
+
+	g_menu = new PrintMenu(fnt);
+}
 
 int main(int argc, char *argv[])
 {
+	init();
+	run();
 	return 0;
 }

menu.cpp

@@ -39,7 +39,7 @@ void Menu::printText(SDL_Surface *where, const char *msg, SDL_Color clr,
 		int last_char = w / pixels_per_char;
 
 		/* FIXME! Handle some corner cases here (short strings etc) */
-		panic_if(last_char > strlen(msg),
+		panic_if((unsigned)last_char > strlen(msg),
 				"last character (%d) is after the string length (%d)\n",
 				last_char, strlen(msg));
 		if (last_char > 3)
@@ -106,9 +106,10 @@ void Menu::draw(SDL_Surface *where, int x, int y, int w, int h)
 	int line_height = (font_height + font_height / 4);
 	int x_start = x;
 	int y_start = y + line_height;
-	SDL_Rect r;
 	int entries_visible = h / line_height - 2;
 
+	panic_if(!this->pp_msgs, "Set the messages before drawing, thank you\n");
+
 	if (this->cur_sel - this->start_entry_visible > entries_visible)
 	{
 		while (this->cur_sel - this->start_entry_visible > entries_visible)
@@ -226,7 +227,6 @@ void Menu::selectOne(int which)
 void Menu::selectNext(int dx, int dy)
 {
 	int next;
-	char buffer[256];
 
 	this->cur_sel = this->getNextEntry(dy);
 	next = this->getNextEntry(dy + 1);

menu.hh

@@ -70,9 +70,9 @@ protected:
 	void printText(SDL_Surface *where, const char *msg, SDL_Color clr,
 			int x, int y, int w, int h);
 
-	virtual void selectCallback(int which);
+	virtual void selectCallback(int which) = 0;
 
-	virtual void escapeCallback(int which);
+	virtual void escapeCallback(int which) = 0;
 
 	submenu_t *findSubmenu(int index);
 

utils.cpp

@@ -1,5 +1,7 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <dirent.h>
+#include <sys/stat.h>
 #include <SDL_ttf.h>
 
 #include "utils.hh"
@@ -16,7 +18,7 @@ TTF_Font *read_and_alloc_font(const char *path)
 		exit(1);
 	}
 	if (!fp) {
-		fprintf(stderr, "Could not open font\n");
+		fprintf(stderr, "Could not open font %s\n", path);
 		exit(1);
 	}
 	fread(data, 1, 1 * 1024 * 1024, fp);
@@ -29,7 +31,8 @@ TTF_Font *read_and_alloc_font(const char *path)
 	out = TTF_OpenFontRW(rw, 1, 20);
 	if (!out)
 	{
-		fprintf(stderr, "Unable to open font %s\n", path);
+		fprintf(stderr, "TTF: Unable to create font %s (%s)\n",
+				path, TTF_GetError());
 		exit(1);
 	}
 	fclose(fp);

utils.hh

@@ -5,9 +5,9 @@
 
 #define panic(x...) do \
   { \
-    fprintf(stderr, "============Translator panic===========\n"); \
+    fprintf(stderr, "=============PANIC PANIC PANIC===========\n"); \
     fprintf(stderr, x); \
-    fprintf(stderr, "=======================================\n"); \
+    fprintf(stderr, "=========================================\n"); \
     exit(1); \
   } while(0)
 
@@ -39,4 +39,6 @@ static inline void *xmalloc(size_t sz)
     panic_if(r < 0 || r >= (int)(size), "snprintf failed for %s with %d\n", fmt, r); \
 } while(0)
 
+TTF_Font *read_and_alloc_font(const char *path);
+
 #endif /* __UTILS_H__ */