gui.h

typedef struct gcolor   GColor;
typedef struct gfont    GFont;
typedef struct grect    GRect;
typedef struct gevent   GEvent;
typedef enum   gpointer GPointer;

enum gpointer {
	GPNormal,
	GPResize,
};

struct gcolor {
	unsigned char red;
	unsigned char green;
	unsigned char blue;
	unsigned char x;
};

#define GBlack      (GColor){ 0, 0, 0, 0 }
#define GGray       (GColor){ 150, 150, 150, 0 }
#define GPaleBlue   (GColor){ 208, 235, 255, 0 }
#define GPaleGreen  (GColor){ 231, 255, 221, 0 }
#define GPalePink   (GColor){ 255, 248, 221, 0 }
#define GPaleYellow (GColor){ 255, 255, 234, 0 }
#define GPinkLace   (GColor){ 255, 221, 244, 0 }
#define GXBlack     (GColor){ 0, 0, 0, 1 }

struct gfont {
	int ascent;
	int descent;
	int height;
};

struct grect {
	int x, y;
	int w, h;
};

struct gevent {
	enum {
		GResize,
		GKey,
		GMouseDown,
		GMouseUp,
		GMouseSelect,
	} type;

	union {
		struct {
			int width;
			int height;
		} resize;
		Rune key;
		struct {
			enum {
				GBLeft,
				GBMiddle,
				GBRight,
				GBWheelUp,
				GBWheelDown,
			} button;
			int x;
			int y;
		} mouse;
	};
};

enum {
	GKEsc = 0x1b,

	GKF1 = 0xe001, /* unicode private use area */
	GKF2,
	GKF3,
	GKF4,
	GKF5,
	GKF6,
	GKF7,
	GKF8,
	GKF9,
	GKF10,
	GKF11,
	GKF12,
	GKLeft,
	GKRight,
	GKUp,
	GKDown,
	GKPageUp,
	GKPageDown,
	GKBackspace,
};

#define CTRL(x) ((x) ^ 64)

struct gui {
	int (*init)(void);
	void (*fini)(void);
	void (*getfont)(GFont *fret);
	void (*decorate)(GRect *clip, int dirty, GColor color);
	void (*drawtext)(GRect *clip, Rune *str, int len,
	                 int x, int y, GColor color);
	void (*drawrect)(GRect *clip, int x, int y, int w, int h, GColor c);
	void (*drawcursor)(GRect *clip, int insert, int x, int y, int w);
	void (*setpointer)(GPointer pt);
	int (*sync)(void);
	int (*textwidth)(Rune *str, int len);
	int (*nextevent)(GEvent *eret);
	int hmargin;
	int vmargin;
	int border;
	GRect actionr;
};

/* Available gui modules */
extern struct gui gui_x11;
extern struct gui gui_sdl;