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Annotation of previous_trunk/src/gui-sdl/dlgAlert.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Hatari - dlgAlert.c - AES-like AlertBox 
        !             3:  *
        !             4:  * Based on dlgAlert.cpp from the emulator ARAnyM,
        !             5:  * Copyright (c) 2004 Petr Stehlik of ARAnyM dev team
        !             6:  *
        !             7:  * Adaptation to Hatari by Thomas Huth.
        !             8:  *
        !             9:  * This file is free software; you can redistribute it and/or modify
        !            10:  * it under the terms of the GNU General Public License as published by
        !            11:  * the Free Software Foundation; either version 2 of the License, or
        !            12:  * (at your option) any later version.
        !            13:  *
        !            14:  * This file is distributed in the hope that it will be useful,
        !            15:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            16:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            17:  * GNU General Public License (gpl.txt) for more details.
        !            18:  */
        !            19: const char DlgAlert_fileid[] = "Hatari dlgAlert.c : " __DATE__ " " __TIME__;
        !            20: 
        !            21: #include <string.h>
        !            22: 
        !            23: #include "main.h"
        !            24: #include "dialog.h"
        !            25: #include "screen.h"
        !            26: #include "sdlgui.h"
        !            27: 
        !            28: 
        !            29: #define MAX_LINES 4
        !            30: 
        !            31: static char dlglines[MAX_LINES][50+1];
        !            32: 
        !            33: #ifdef ALERT_HOOKS 
        !            34:        // The alert hook functions
        !            35:        int HookedAlertNotice(const char* szMessage);   // Must return true if OK clicked, false otherwise
        !            36:        int HookedAlertQuery(const char* szMessage);            // Must return true if OK clicked, false otherwise
        !            37: #endif
        !            38: 
        !            39: #define DLGALERT_OK       5
        !            40: #define DLGALERT_CANCEL   6
        !            41: 
        !            42: /* The "Alert"-dialog: */
        !            43: static SGOBJ alertdlg[] =
        !            44: {
        !            45:        { SGBOX, 0, 0, 0,0, 52,7, NULL },
        !            46:        { SGTEXT, 0, 0, 1,1, 50,1, dlglines[0] },
        !            47:        { SGTEXT, 0, 0, 1,2, 50,1, dlglines[1] },
        !            48:        { SGTEXT, 0, 0, 1,3, 50,1, dlglines[2] },
        !            49:        { SGTEXT, 0, 0, 1,4, 50,1, dlglines[3] },
        !            50:        { SGBUTTON, SG_DEFAULT, 0, 5,5, 8,1, "OK" },
        !            51:        { SGBUTTON, SG_CANCEL, 0, 24,5, 8,1, "Cancel" },
        !            52:        { -1, 0, 0, 0,0, 0,0, NULL }
        !            53: };
        !            54: 
        !            55: 
        !            56: /*-----------------------------------------------------------------------*/
        !            57: /**
        !            58:  * Breaks long string to several strings of max_width, divided by '\0',
        !            59:  * sets text_width to the longest line width and returns the number of lines
        !            60:  * you need to display the strings.
        !            61:  */
        !            62: static int DlgAlert_FormatTextToBox(char *text, int max_width, int *text_width)
        !            63: {
        !            64:        int columns = 0;
        !            65:        int lines = 1;
        !            66:        int txtlen;
        !            67:        char *p;            /* pointer to begin of actual line */
        !            68:        char *q;            /* pointer to start of next search */
        !            69:        char *llb;          /* pointer to last place suitable for breaking the line */
        !            70:        char *txtend;       /* pointer to end of the text */
        !            71: 
        !            72:        txtlen = strlen(text);
        !            73: 
        !            74:        q = p = text;
        !            75:        llb = text-1;       /* pointer to last line break */
        !            76:        txtend = text + txtlen;
        !            77: 
        !            78:        if (txtlen <= max_width)
        !            79:        {
        !            80:                *text_width = txtlen;
        !            81:                return lines;
        !            82:        }
        !            83: 
        !            84:        while(q < txtend)                             /* q was last place suitable for breaking */
        !            85:        {
        !            86:                char *r = strpbrk(q, " \t/\\\n");     /* find next suitable place for the break */
        !            87:                if (r == NULL)
        !            88:                        r = txtend;                   /* if there's no place then point to the end */
        !            89: 
        !            90:                if ((r-p) <= max_width && *r != '\n') /* '\n' is always used for breaking */
        !            91:                {
        !            92:                        llb = r;                      /* remember new place suitable for breaking */
        !            93:                        q++;
        !            94:                        if ((r-p) > columns)
        !            95:                                columns = r - p;
        !            96:                        continue;                     /* search again */
        !            97:                }
        !            98: 
        !            99:                if ((r-p) > max_width)                /* too long line already? */
        !           100:                {
        !           101:                        if (p > llb)                  /* bad luck - no place for the delimiter. Let's do it the strong way */
        !           102:                                llb = p + max_width;  /* we loose one character */
        !           103:                }
        !           104:                else
        !           105:                        llb = r;                /* break from previous delimiter */
        !           106: 
        !           107:                *llb = '\0';                    /* BREAK */
        !           108:                if ((llb-p) > columns)
        !           109:                        columns = llb - p;      /* longest line so far */
        !           110:                p = q = llb + 1;                /* next line begins here */
        !           111:                lines++;                        /* increment line counter */
        !           112:        }
        !           113: 
        !           114:        *text_width = columns;
        !           115: 
        !           116:        return lines;                           /* return line counter */
        !           117: }
        !           118: 
        !           119: 
        !           120: 
        !           121: /*-----------------------------------------------------------------------*/
        !           122: /**
        !           123:  * Show the "alert" dialog. Return true if user pressed "OK".
        !           124:  */
        !           125: static int DlgAlert_ShowDlg(const char *text)
        !           126: {
        !           127:        static int maxlen = sizeof(dlglines[0])-1;
        !           128:        char *t = (char *)malloc(strlen(text)+1);
        !           129:        char *orig_t = t;
        !           130:        int lines, i, len, offset;
        !           131:        bool bOldMouseVisibility;
        !           132:        int nOldMouseX, nOldMouseY;
        !           133: 
        !           134:        strcpy(t, text);
        !           135:        lines = DlgAlert_FormatTextToBox(t, maxlen, &len);
        !           136:        offset = (maxlen-len)/2;
        !           137: 
        !           138:        for(i=0; i<MAX_LINES; i++)
        !           139:        {
        !           140:                if (i < lines)
        !           141:                {
        !           142:                        /* center text to current dlgline */
        !           143:                        memset(dlglines[i], ' ', offset);
        !           144:                        strcpy(dlglines[i] + offset, t);
        !           145:                        t += strlen(t)+1;
        !           146:                }
        !           147:                else
        !           148:                {
        !           149:                        dlglines[i][0] = '\0';
        !           150:                }
        !           151:        }
        !           152: 
        !           153:        free(orig_t);
        !           154: 
        !           155:        if (SDLGui_SetScreen(sdlscrn))
        !           156:                return false;
        !           157:        SDLGui_CenterDlg(alertdlg);
        !           158: 
        !           159:        SDL_GetMouseState(&nOldMouseX, &nOldMouseY);
        !           160:        bOldMouseVisibility = SDL_ShowCursor(SDL_QUERY);
        !           161:        SDL_ShowCursor(SDL_ENABLE);
        !           162: 
        !           163:        i = SDLGui_DoDialog(alertdlg, NULL);
        !           164: 
        !           165:        SDL_UpdateRect(sdlscrn, 0,0, 0,0);
        !           166:        SDL_ShowCursor(bOldMouseVisibility);
        !           167:        Main_WarpMouse(nOldMouseX, nOldMouseY);
        !           168: 
        !           169:        return (i == DLGALERT_OK);
        !           170: }
        !           171: 
        !           172: 
        !           173: /*-----------------------------------------------------------------------*/
        !           174: /**
        !           175:  * Show a "notice" dialog: (only one button)
        !           176:  */
        !           177: int DlgAlert_Notice(const char *text)
        !           178: {
        !           179: #ifdef ALERT_HOOKS 
        !           180:        return HookedAlertNotice(text);
        !           181: #endif
        !           182: 
        !           183:        /* Hide "cancel" button: */
        !           184:        alertdlg[DLGALERT_CANCEL].type = SGTEXT;
        !           185:        alertdlg[DLGALERT_CANCEL].txt = "";
        !           186:        alertdlg[DLGALERT_CANCEL].w = 0;
        !           187:     alertdlg[DLGALERT_CANCEL].h = 0;
        !           188: 
        !           189:        /* Adjust button position: */
        !           190:        alertdlg[DLGALERT_OK].x = (alertdlg[0].w - alertdlg[DLGALERT_OK].w) / 2;
        !           191: 
        !           192:        return DlgAlert_ShowDlg(text);
        !           193: }
        !           194: 
        !           195: 
        !           196: /*-----------------------------------------------------------------------*/
        !           197: /**
        !           198:  * Show a "query" dialog: (two buttons), return true for OK
        !           199:  */
        !           200: int DlgAlert_Query(const char *text)
        !           201: {
        !           202: #ifdef ALERT_HOOKS
        !           203:        return HookedAlertQuery(text);
        !           204: #endif
        !           205: 
        !           206:        /* Show "cancel" button: */
        !           207:        alertdlg[DLGALERT_CANCEL].type = SGBUTTON;
        !           208:        alertdlg[DLGALERT_CANCEL].txt = "Cancel";
        !           209:        alertdlg[DLGALERT_CANCEL].w = 8;
        !           210:        alertdlg[DLGALERT_CANCEL].h = 1;
        !           211: 
        !           212:        /* Adjust buttons positions: */
        !           213:        alertdlg[DLGALERT_OK].x = (alertdlg[0].w - alertdlg[DLGALERT_OK].w - alertdlg[DLGALERT_CANCEL].w) / 3;
        !           214:        alertdlg[DLGALERT_CANCEL].x = alertdlg[DLGALERT_OK].x * 2 + alertdlg[DLGALERT_OK].w;
        !           215: 
        !           216:        return DlgAlert_ShowDlg(text);
        !           217: }

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