test.c

一个很好的SDL建立应用程序界面的例子

/*
 * SDL Simple C widget set test
 * Copyright 2004 by
 * Jeffery L. Post
 * [e-mail]
 *
 * test.c - Main File - 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
 *
 */

#include	<stdio.h>
#include	<stdlib.h>
#include	<ctype.h>
#include	<string.h>

#ifndef WIN32
#include	<SDL/SDL_syswm.h>
#else
#include <windows.h>
#endif

#define	DEBUG

#include	"test.h"
#include	"widgets.h"
#include	"fileselect.h"

#ifdef DEBUG
extern void dump_widget_list(void);	// for test only
#endif

// Constants

#define	VERNO		0
#define	MAJORREV	0
#define	MINORREV	3

#define	WINDOW_X_POSITION		20
#define	WINDOW_Y_POSITION		20
#define	KB_DELAY					250	// key repeat start delay
#define	KB_INTERVAL				50		// key repeat interval

// Prototypes

/* none */

// Global variables

SDL_Surface	*screen = NULL;

MENU		*menu = NULL;			// main menu
MENU		*options = NULL;		// options bar (checkboxes)
MENU		*filename = NULL;		// current file name menu
LABEL		*filelabel = NULL;	// current file name label
char		filestr[128];			// the current file name
bool		fileButtonActive = FALSE;
bool		fileSelectionActive = FALSE;
VMENU		*file_menu = NULL;	// file sub-menu
bool		helpButtonActive = FALSE;
VMENU		*help_menu = NULL;	// help screen
bool		aboutButtonActive = FALSE;
VMENU		*about_menu = NULL;	// about screen
TEXTBOX	*tbox_test = NULL;
bool		tboxActive = FALSE;
ALERT		*testAlert = NULL;
bool		quit = FALSE;
bool		checkflag = FALSE;
bool		anotherflag = FALSE;
bool		toggleflag = TRUE;
HSLIDER	*hSlider = NULL;
VSLIDER	*vSlider = NULL;
LABEL		*vSliderLabel = NULL;
LABEL		*hSliderLabel = NULL;
INPUTBOX	*ibox_test = NULL;
bool		iboxActive = FALSE;

INPUTBOX	*mibox_test = NULL;
LABEL		*mibox_label = NULL;

char		vSliderText[] = "Vertical Slider:   0%";
char		hSliderText[] = "Horizontal Slider:   0%";
char		caption[] = "Simple C Widgets for SDL - Version x.xx";
char		font_set[16][17];
char		fileNameInput[128];

char		lineone[128];
char		linetwo[128];
char		linethree[128];
char		linefour[128];

//
//		Code
//

void hSliderCB(SDL_Event *event, HSLIDER *hs)
{
	sprintf(hSliderText, "Horizontal Slider: %3d%%", hs->pc);

//	if (event->type == SDL_MOUSEBUTTONUP)
//		removeCallBack(hs, SDL_MOUSEMOTION);
}

void hSliderAutoCB(void)
{
	hSliderCB(NULL, hSlider);
	showWidget(hSliderLabel);
}

void vSliderCB(SDL_Event *event, VSLIDER *vs)
{
	sprintf(vSliderText, "Vertical Slider: %3d%%", vs->pc);

//	if (event->type == SDL_MOUSEBUTTONUP)
//		removeCallBack(vs, SDL_MOUSEMOTION);
}

void vSliderAutoCB(void)
{
	vSliderCB(NULL, vSlider);
	showWidget(vSliderLabel);
}

void fileButtonCB(SDL_Event *event)
{
	if (fileSelectionActive)
		return;

	fileButtonActive ^= TRUE;
	if (fileButtonActive)
		popUpWidget(file_menu);
	else
		pushDownWidget(file_menu);
}

void editButtonCB(SDL_Event *event)
{
	popUpWidget(testAlert);
}

void configButtonCB(SDL_Event *event)
{
	if (fileSelectionActive)
		return;

	tboxActive ^= TRUE;

	if (tboxActive)
		popUpWidget(tbox_test);
	else
		pushDownWidget(tbox_test);
}

void helpButtonCB(SDL_Event *event)
{
	if (fileSelectionActive)
		return;

	helpButtonActive ^= TRUE;

	if (helpButtonActive)
		popUpWidget(help_menu);
	else
		pushDownWidget(help_menu);
}

void helpMenuCB(SDL_Event *event, BUTTON *b)
{
	if (fileSelectionActive || !helpButtonActive)
		return;

	if (helpButtonActive)
		popUpWidget(help_menu);
}

void aboutButtonCB(SDL_Event *event)
{
	if (fileSelectionActive)
		return;

	aboutButtonActive ^= TRUE;

	if (aboutButtonActive)
		popUpWidget(about_menu);
	else
		pushDownWidget(about_menu);
}

void aboutMenuCB(SDL_Event *event, BUTTON *b)
{
	if (fileSelectionActive || !aboutButtonActive)
		return;

	if (aboutButtonActive)
		popUpWidget(about_menu);
}

void openButtonCB(SDL_Event *event, MENU *m)
{
	char	*cptr;

	if (!fileButtonActive || fileSelectionActive)
		return;

	if (event->type == SDL_MOUSEBUTTONDOWN)
	{
		fileSelectionActive = TRUE;
		cptr = fileSelect(NULL, NULL);
		fileSelectionActive = FALSE;

		if (cptr == (char *) -1)
		{
			quit = TRUE;
		}
		else if (cptr)
		{
			strcpy(filestr, cptr);
			filelabel->text = (char *) &filestr;
		}

		fileButtonActive = FALSE;
		pushDownWidget(file_menu);
	}
}

void saveButtonCB(SDL_Event *event, MENU *m)
{
	if (!fileButtonActive || fileSelectionActive)
		return;

	if (event->type == SDL_MOUSEBUTTONDOWN && !iboxActive)
	{
		iboxActive = TRUE;
		ibox_test->cursorx = 0;
		ibox_test->text->str[0] = '\0';
		popUpWidget(ibox_test);
	}
}

void closeButtonCB(SDL_Event *event, MENU *m)
{
	if (!fileButtonActive || fileSelectionActive)
		return;

	if (event->type == SDL_MOUSEBUTTONDOWN)
	{
		fileButtonActive = FALSE;
		pushDownWidget(file_menu);
	}
}

void alertCB(SDL_Event *event, ALERT *ab)
{
	bool	remove = FALSE;

	if (ab->response == ALERT_CANCEL)
		remove = TRUE;
	else if (ab->response == ALERT_OK)
		remove = TRUE;

	if (remove)
		pushDownWidget(testAlert);
}

void tboxCB(SDL_Event *event, BUTTON *b)
{
	if (fileSelectionActive)
		return;

	if (tboxActive)
		popUpWidget(tbox_test);
}

void iboxCB(SDL_Event *event, INPUTBOX *b)
{
	int	i;
	char	chr;

	if (iboxActive)
	{
		if (event->type == SDL_KEYDOWN)
		{
			chr = event->key.keysym.unicode;

			if (chr == SDLK_RETURN)
			{
				b->cursorx = 0;
				b->cursory = 0;
				iboxActive = FALSE;
				pushDownWidget(ibox_test);

// user input is in fileNameInput, do something with it...

				for (i=0; i<64; i++)				// clear out file name input for next time
					fileNameInput[i] = '\0';
			}
		}
	}
}

void miboxCB(SDL_Event *event, INPUTBOX *b)
{
	if (b != topWidget)
		popUpWidget(b);

	// Do whatever needs to be done with the input
}

void exitButtonCB(SDL_Event *event, MENU *m)
{
	if (!fileButtonActive || fileSelectionActive)
		return;

	quit = TRUE;
	fileButtonActive = FALSE;
	pushDownWidget(file_menu);
}

void checkBoxCB(SDL_Event *event, CHECKBOX *cb)
{
	int	x, y, mx, my;

	if (fileButtonActive || fileSelectionActive)
		return;

	if (event->type == SDL_MOUSEBUTTONDOWN)
	{
		mx = event->button.x;
		my = event->button.y;
		x = cb->x + 4;
		y = cb->y;

		if (mx > x && mx < x + FONT_WIDTH * 3 && my > y && my < y + FONT_HEIGHT)
		{
			*cb->value ^= TRUE;

			if (*cb->value)
				drawChar(x + FONT_WIDTH, y, cb->fg, cb->bg, (char) 0xfb);
			else
				drawChar(x + FONT_WIDTH, y, cb->fg, cb->bg, ' ');
		}
	}
}

void textboxCB(SDL_Event *event, TEXTBOX *tbox)
{
	if (topWidget == tbox_test)
	{
		switch (event->key.keysym.sym)
		{
			case SDLK_UP:
				decTListEntry(tbox_test, 1);
				break;