widgets.h

一个很好的SDL建立应用程序界面的例子

/*
 * widgets.h - SDL widget set in C
 *
 * Copyright 2004 by Jeffery L. Post
 * theposts<AT>pacbell<DOT>net
 * Version 0.0.3 - 11/26/04
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef	_WIDGETS_H_
#define	_WIDGETS_H_

#ifdef WIN32
#include <windows.h>
#endif

#include	<assert.h>
#include	<SDL/SDL.h>

#define	DEBUG

#ifndef	bool
#define	bool	int
#endif

#ifndef	FALSE
#define	FALSE		0
#endif

#ifndef	TRUE
#define	TRUE		1
#endif

#ifdef	WIN32
#define	strcasecmp(a,b)	stricmp(a,b)
#define	lstat	stat
#endif

#define	FONT_WIDTH				6
#define	FONT_HEIGHT				13

#define	SLIDERSIZE				4		// minimum size of slider handle in pixels
#define	SLIDERBUTTONSIZE		10		// size of adjust buttons on sliders
#define	SLIDER_AUTO_CALLBACK	(SDL_NUMEVENTS + 1)
#define	TIMER_EVENT				(SDL_NUMEVENTS + 2)

#define	IBOX_INSERT_MODE		0
#define	IBOX_OVERWRITE_MODE	1

// For Slider auto callbacks, slider->state tells where the
// mouse is currently located by one of the following codes.

enum SliderMouseCodes {
	MOUSE_NOT_IN_SLIDER,				// mouse not positioned within slider
	MOUSE_IN_SLIDER_UPBUTTON,		// mouse is in the up/left button
	MOUSE_IN_SLIDER_DOWNBUTTON,	// mouse is in the down/right button
	MOUSE_IN_UPPER_SLIDER,			// mouse within slider region above marker
	MOUSE_IN_LOWER_SLIDER,			// mouse within slider region below marker
	MOUSE_ON_SLIDER					// mouse is on the marker
};

// AlertBox responses

enum alertResponses {
	ALERT_NO_RESPONSE,
	ALERT_CANCEL,
	ALERT_OK
};

// Graphic characters

#define	UPPER_LEFT_CORNER		0xda
#define	UPPER_RIGHT_CORNER	0xbf
#define	LOWER_LEFT_CORNER		0xc0
#define	LOWER_RIGHT_CORNER	0xd9
#define	HORIZONTAL_LINE		0xc4
#define	VERTICAL_LINE			0xb3
#define	CHECK_MARK				0xfb

enum WidgetType {			// types of widgets
	WindowType,				// 0
	MenuType,				// 1
	VMenuType,				// 2
	ButtonType,				// 3
	CheckBoxType,			// 4
	LabelType,				// 5
	HLabelType,				// 6
	AlertType,				// 7
	NoticeType,				// 8
	TextBoxType,			// 9
	InputBoxType,			// 10
	VSliderType,			// 11
	HSliderType,			// 12
	MaxWidgetType			// Invalid type
};

// Button widget

typedef struct {
	int	type;				// ButtonType
	int	id;
	int	x;					// x location relative to parent
	int	y;					// y location relative to parent
	int	w;					// width
	int	h;					// height
	int	fg;				// text foreground color
	int	bg;				// text background color
	int	hi;				// border highlight color
	int	lo;				// border lowlight color
	void	*mdfunc;			// function to call when mouse button down within window
	void	*mufunc;			// function to call when mouse button up within window
	void	*mmfunc;			// function to call when mouse button motion within window
	void	*kdfunc;			// function to call on keypress
	void	*kufunc;			// function to call on keyrelease
	void	*parent;

	bool	border;			// true = show left/right borders
	char	*text;			// text of button
} BUTTON;

// Checkbox widget

typedef struct {
	int	type;				// CheckBoxType
	int	id;
	int	x;					// x location relative to parent
	int	y;					// y location relative to parent
	int	w;					// width
	int	h;					// height
	int	fg;				// text foreground color
	int	bg;				// text background color
	int	hi;				// border highlight color
	int	lo;				// border lowlight color
	void	*mdfunc;			// function to call when mouse button down within window
	void	*mufunc;			// function to call when mouse button up within window
	void	*mmfunc;			// function to call when mouse button motion within window
	void	*kdfunc;			// function to call on keypress
	void	*kufunc;			// function to call on keyrelease
	void	*parent;

	bool	border;			// true = show left/right borders
	char	*text;			// text of checkbox
	bool	*value;
} CHECKBOX;

// Label widget

typedef struct {
	int	type;				// LabelType
	int	id;
	int	x;					// x location relative to parent
	int	y;					// y location relative to parent
	int	w;					// width
	int	h;					// height
	int	fg;				// text foreground color
	int	bg;				// text background color
	int	hi;				// border highlight color
	int	lo;				// border lowlight color
	void	*mdfunc;			// function to call when mouse button down within window
	void	*mufunc;			// function to call when mouse button up within window
	void	*mmfunc;			// function to call when mouse button motion within window
	void	*kdfunc;			// function to call on keypress
	void	*kufunc;			// function to call on keyrelease
	void	*parent;

	bool	border;			// true = show left/right borders
	char	*text;			// text of button
} LABEL;

// Highlighted Label widget

typedef struct {
	int	type;				// HLabelType
	int	id;
	int	x;					// x location relative to parent
	int	y;					// y location relative to parent
	int	w;					// width
	int	h;					// height
	int	fg;				// text foreground color
	int	bg;				// text background color
	int	hi;				// border highlight color
	int	lo;				// border lowlight color
	void	*mdfunc;			// function to call when mouse button down within window
	void	*mufunc;			// function to call when mouse button up within window
	void	*mmfunc;			// function to call when mouse button motion within window
	void	*kdfunc;			// function to call on keypress
	void	*kufunc;			// function to call on keyrelease
	void	*parent;

	bool	border;			// true = show left/right borders
	char	*text;			// text of button
	bool	hlflag;			// TRUE = enable highlight text
} HLABEL;

union LISTMEMBER{
	BUTTON	*button;
	CHECKBOX	*checkbox;
	LABEL		*label;
	HLABEL	*hlabel;
};

typedef struct buttonList {
	union LISTMEMBER	thislist;
	struct buttonList	*next;
} BLIST;

typedef BLIST	CLIST;

// Window widget

typedef struct {
	int	type;				// WindowType
	int	id;
	int	x;					// x location relative to parent
	int	y;					// y location relative to parent
	int	w;					// width
	int	h;					// height
	int	fg;				// text foreground color
	int	bg;				// text background color
	int	hi;				// border highlight color
	int	lo;				// border lowlight color
	void	*mdfunc;			// function to call when mouse button down within window
	void	*mufunc;			// function to call when mouse button up within window
	void	*mmfunc;			// function to call when mouse button motion within window
	void	*kdfunc;			// function to call on keypress
	void	*kufunc;			// function to call on keyrelease
	void	*parent;

	BLIST	*list;			// buttons attached to window
} WINDOW;

// Menu widget

typedef struct {
	int	type;				// MenuType
	int	id;
	int	x;					// x location relative to parent
	int	y;					// y location relative to parent
	int	w;					// width
	int	h;					// height
	int	fg;				// text foreground color
	int	bg;				// text background color
	int	hi;				// border highlight color
	int	lo;				// border lowlight color
	void	*mdfunc;			// function to call when mouse button down within window
	void	*mufunc;			// function to call when mouse button up within window
	void	*mmfunc;			// function to call when mouse button motion within window
	void	*kdfunc;			// function to call on keypress
	void	*kufunc;			// function to call on keyrelease
	void	*parent;

	BLIST	*list;			// buttons attached to window
} MENU;

// Vertical Menu widget

typedef struct {
	int	type;				// VMenuType
	int	id;
	int	x;					// x location relative to parent
	int	y;					// y location relative to parent
	int	w;					// width
	int	h;					// height
	int	fg;				// text foreground color
	int	bg;				// text background color
	int	hi;				// border highlight color
	int	lo;				// border lowlight color
	void	*mdfunc;			// function to call when mouse button down within window
	void	*mufunc;			// function to call when mouse button up within window
	void	*mmfunc;			// function to call when mouse button motion within window
	void	*kdfunc;			// function to call on keypress
	void	*kufunc;			// function to call on keyrelease
	void	*parent;

	BLIST	*list;			// buttons attached to window
} VMENU;

// Alert box widget

typedef struct {
	int	type;				// AlertType
	int	id;
	int	x;					// x location relative to parent
	int	y;					// y location relative to parent
	int	w;					// width
	int	h;					// height
	int	fg;				// text foreground color