自学教程：C++ text_height函数代码示例

void AWgtCheckbox::draw(){	int tx;	int ty;	if (checkCheckedBmp) {		if (checked)			draw_sprite(tguiBitmap, checkCheckedBmp, x, y);		else			draw_sprite(tguiBitmap, checkUncheckedBmp, x, y);		tx = x + checkCheckedBmp->w + checkPadding;		ty = y + ((checkCheckedBmp->h - text_height(aWgtFont)) / 2);	}	else {		int w = text_height(aWgtFont);		rect(tguiBitmap, x, y, x+w-1, y+w-1, shadowColor);		rectfill(tguiBitmap, x+1, y+1, x+w-2, y+w-2, textColor);		if (checked) {			line(tguiBitmap, x+1, y+1, x+w-2, y+w-2, shadowColor);			line(tguiBitmap, x+1, y+w-2, x+w-2, y+1, shadowColor);		}		tx = x + w + checkPadding;		ty = y;	}	aWgtTextout(tguiBitmap, aWgtFont, text, tx, ty, textColor, shadowColor,			shadowType);	if (focus) {		drawing_mode(DRAW_MODE_MASKED_PATTERN, linePatternBmp, 0, 0);		rect(tguiBitmap, tx-2, ty-2, tx+text_length(aWgtFont, text)+2,				ty+text_height(aWgtFont)+2, aWgtFocusColor);		drawing_mode(DRAW_MODE_SOLID, 0, 0, 0);	}}

intd_abitmap_list_proc (int msg, DIALOG *d, int c){	if (msg == MSG_DRAW) {		BITMAP *bmp = gui_get_screen();		int height, size, i, len, bar, x, y;		char *sel = d->dp2;		char s[1024];		int c = 0;		if (d->flags & D_GOTFOCUS)			c = 1;		if (d->flags & D_DISABLED)			c = 2;		(*(char *(*)(int, int *)) d->dp) (-1, &size);		height = (d->h - 4) / text_height (font);		bar = (size > height);		abitmap_draw_area (d, B_LIST, 0, 0, bar ? d->w - 12 : d->w, d->h, 0, 0);		if (bar)			abitmap_draw_scroller (d, d->d2, size, height);		/* draw the contents */		for (i = 0; i < height; i++) {			if (d->d2 + i < size) {				int fg = theme->bitmaps[B_LIST][c].color;				x = d->x + 2;				y = d->y + 2 + i * text_height (font);				if (d->d2 + i == d->d1 || ((sel) && (sel[d->d2 + i]))) {					abitmap_draw_area (d, B_LIST_ITEM, 0, y - d->y,						bar ? d->w - 12 : d->w, text_height (font), 0, 0);					fg = theme->bitmaps[B_LIST_ITEM][c].color;				}				ustrzcpy (s, sizeof (s),					(*(char *(*)(int, int *)) d->dp) (i + d->d2, NULL));				x += 8;				len = ustrlen (s);				while (text_length (font, s) >=				MAX (d->w - 1 - (bar ? 22 : 11), 1)) {					len--;					usetat (s, len, 0);				}				textout_ex (bmp, font, s, x, y, fg, -1);				x += text_length (font, s);			}		}		return D_O_K;	}	return d_list_proc (msg, d, c);}

static void gtk_draw_menu_item(MENU *m, int x, int y, int w, int h, int bar, int sel){    BITMAP *bmp = gui_get_screen();    int fg, bg;    int i, j;    char buf[256], *tok;    if (m->flags & D_DISABLED) {        fg = nshadow;        bg = normal;    }    else {        fg = black;        bg = (sel) ? highlight : normal;    }    rectfill(bmp, x+1, y+1, x+w-3, y+h-4, bg);    if (ugetc(m->text)) {        i = 0;        j = ugetc(m->text);        while ((j) && (j != '/t')) {            i += usetc(buf+i, j);            j = ugetc(m->text+i);        }        usetc(buf+i, 0);        gui_textout_ex(bmp, buf, x+8, y+1, fg, bg, FALSE);        if (j == '/t') {            tok = m->text+i + uwidth(m->text+i);            gui_textout_ex(bmp, tok, x+w-gui_strlen(tok)-10, y+1, fg, bg, FALSE);        }        if ((m->child) && (!bar))            draw_sprite(bmp, menu_arrow_bmp, x+w-12, y+(h-menu_arrow_bmp->h)/2);    }    else {        hline(bmp, x+4, y+text_height(font)/2+2, x+w-4, nshadow);        hline(bmp, x+4, y+text_height(font)/2+3, x+w-4, highlight);    }    if (m->flags & D_SELECTED) {        line(bmp, x+1, y+text_height(font)/2+1, x+3, y+text_height(font)+1, fg);        line(bmp, x+3, y+text_height(font)+1, x+6, y+2, fg);    }}

Imagen::Imagen(Fuente *fuente, string texto, int r, int g, int b){    if ( !fuente )    {        bitmap = NULL ;        throw Error::ExcepcionParametro("Graficos::Imagen::Imagen(Fuente *, string)", 1);    }        // Creamos el bitmap con el tama
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