qmenu.c

著名游戏quake2原代码最新版本(vc6.0可以编译的)

	height = ( ( menucommon_s * ) menu->items[menu->nitems-1])->y;
	height += 10;

	menu->y = ( VID_HEIGHT - height ) / 2;
}

void Menu_Draw( menuframework_s *menu )
{
	int i;
	menucommon_s *item;

	/*
	** draw contents
	*/
	for ( i = 0; i < menu->nitems; i++ )
	{
		switch ( ( ( menucommon_s * ) menu->items[i] )->type )
		{
		case MTYPE_FIELD:
			Field_Draw( ( menufield_s * ) menu->items[i] );
			break;
		case MTYPE_SLIDER:
			Slider_Draw( ( menuslider_s * ) menu->items[i] );
			break;
		case MTYPE_LIST:
			MenuList_Draw( ( menulist_s * ) menu->items[i] );
			break;
		case MTYPE_SPINCONTROL:
			SpinControl_Draw( ( menulist_s * ) menu->items[i] );
			break;
		case MTYPE_ACTION:
			Action_Draw( ( menuaction_s * ) menu->items[i] );
			break;
		case MTYPE_SEPARATOR:
			Separator_Draw( ( menuseparator_s * ) menu->items[i] );
			break;
		}
	}

	item = Menu_ItemAtCursor( menu );

	if ( item && item->cursordraw )
	{
		item->cursordraw( item );
	}
	else if ( menu->cursordraw )
	{
		menu->cursordraw( menu );
	}
	else if ( item && item->type != MTYPE_FIELD )
	{
		if ( item->flags & QMF_LEFT_JUSTIFY )
		{
			Draw_Char( menu->x + item->x - 24 + item->cursor_offset, menu->y + item->y, 12 + ( ( int ) ( Sys_Milliseconds()/250 ) & 1 ) );
		}
		else
		{
			Draw_Char( menu->x + item->cursor_offset, menu->y + item->y, 12 + ( ( int ) ( Sys_Milliseconds()/250 ) & 1 ) );
		}
	}

	if ( item )
	{
		if ( item->statusbarfunc )
			item->statusbarfunc( ( void * ) item );
		else if ( item->statusbar )
			Menu_DrawStatusBar( item->statusbar );
		else
			Menu_DrawStatusBar( menu->statusbar );

	}
	else
	{
		Menu_DrawStatusBar( menu->statusbar );
	}
}

void Menu_DrawStatusBar( const char *string )
{
	if ( string )
	{
		int l = strlen( string );
		int maxrow = VID_HEIGHT / 8;
		int maxcol = VID_WIDTH / 8;
		int col = maxcol / 2 - l / 2;

		Draw_Fill( 0, VID_HEIGHT-8, VID_WIDTH, 8, 4 );
		Menu_DrawString( col*8, VID_HEIGHT - 8, string );
	}
	else
	{
		Draw_Fill( 0, VID_HEIGHT-8, VID_WIDTH, 8, 0 );
	}
}

void Menu_DrawString( int x, int y, const char *string )
{
	unsigned i;

	for ( i = 0; i < strlen( string ); i++ )
	{
		Draw_Char( ( x + i*8 ), y, string[i] );
	}
}

void Menu_DrawStringDark( int x, int y, const char *string )
{
	unsigned i;

	for ( i = 0; i < strlen( string ); i++ )
	{
		Draw_Char( ( x + i*8 ), y, string[i] + 128 );
	}
}

void Menu_DrawStringR2L( int x, int y, const char *string )
{
	unsigned i;

	for ( i = 0; i < strlen( string ); i++ )
	{
		Draw_Char( ( x - i*8 ), y, string[strlen(string)-i-1] );
	}
}

void Menu_DrawStringR2LDark( int x, int y, const char *string )
{
	unsigned i;

	for ( i = 0; i < strlen( string ); i++ )
	{
		Draw_Char( ( x - i*8 ), y, string[strlen(string)-i-1]+128 );
	}
}

void *Menu_ItemAtCursor( menuframework_s *m )
{
	if ( m->cursor < 0 || m->cursor >= m->nitems )
		return 0;

	return m->items[m->cursor];
}

qboolean Menu_SelectItem( menuframework_s *s )
{
	menucommon_s *item = ( menucommon_s * ) Menu_ItemAtCursor( s );

	if ( item )
	{
		switch ( item->type )
		{
		case MTYPE_FIELD:
			return Field_DoEnter( ( menufield_s * ) item ) ;
		case MTYPE_ACTION:
			Action_DoEnter( ( menuaction_s * ) item );
			return true;
		case MTYPE_LIST:
//			Menulist_DoEnter( ( menulist_s * ) item );
			return false;
		case MTYPE_SPINCONTROL:
//			SpinControl_DoEnter( ( menulist_s * ) item );
			return false;
		}
	}
	return false;
}

void Menu_SetStatusBar( menuframework_s *m, const char *string )
{
	m->statusbar = string;
}

void Menu_SlideItem( menuframework_s *s, int dir )
{
	menucommon_s *item = ( menucommon_s * ) Menu_ItemAtCursor( s );

	if ( item )
	{
		switch ( item->type )
		{
		case MTYPE_SLIDER:
			Slider_DoSlide( ( menuslider_s * ) item, dir );
			break;
		case MTYPE_SPINCONTROL:
			SpinControl_DoSlide( ( menulist_s * ) item, dir );
			break;
		}
	}
}

int Menu_TallySlots( menuframework_s *menu )
{
	int i;
	int total = 0;

	for ( i = 0; i < menu->nitems; i++ )
	{
		if ( ( ( menucommon_s * ) menu->items[i] )->type == MTYPE_LIST )
		{
			int nitems = 0;
			const char **n = ( ( menulist_s * ) menu->items[i] )->itemnames;

			while (*n)
				nitems++, n++;

			total += nitems;
		}
		else
		{
			total++;
		}
	}

	return total;
}

void Menulist_DoEnter( menulist_s *l )
{
	int start;

	start = l->generic.y / 10 + 1;

	l->curvalue = l->generic.parent->cursor - start;

	if ( l->generic.callback )
		l->generic.callback( l );
}

void MenuList_Draw( menulist_s *l )
{
	const char **n;
	int y = 0;

	Menu_DrawStringR2LDark( l->generic.x + l->generic.parent->x + LCOLUMN_OFFSET, l->generic.y + l->generic.parent->y, l->generic.name );

	n = l->itemnames;

  	Draw_Fill( l->generic.x - 112 + l->generic.parent->x, l->generic.parent->y + l->generic.y + l->curvalue*10 + 10, 128, 10, 16 );
	while ( *n )
	{
		Menu_DrawStringR2LDark( l->generic.x + l->generic.parent->x + LCOLUMN_OFFSET, l->generic.y + l->generic.parent->y + y + 10, *n );

		n++;
		y += 10;
	}
}

void Separator_Draw( menuseparator_s *s )
{
	if ( s->generic.name )
		Menu_DrawStringR2LDark( s->generic.x + s->generic.parent->x, s->generic.y + s->generic.parent->y, s->generic.name );
}

void Slider_DoSlide( menuslider_s *s, int dir )
{
	s->curvalue += dir;

	if ( s->curvalue > s->maxvalue )
		s->curvalue = s->maxvalue;
	else if ( s->curvalue < s->minvalue )
		s->curvalue = s->minvalue;

	if ( s->generic.callback )
		s->generic.callback( s );
}

#define SLIDER_RANGE 10

void Slider_Draw( menuslider_s *s )
{
	int	i;

	Menu_DrawStringR2LDark( s->generic.x + s->generic.parent->x + LCOLUMN_OFFSET,
		                s->generic.y + s->generic.parent->y, 
						s->generic.name );

	s->range = ( s->curvalue - s->minvalue ) / ( float ) ( s->maxvalue - s->minvalue );

	if ( s->range < 0)
		s->range = 0;
	if ( s->range > 1)
		s->range = 1;
	Draw_Char( s->generic.x + s->generic.parent->x + RCOLUMN_OFFSET, s->generic.y + s->generic.parent->y, 128);
	for ( i = 0; i < SLIDER_RANGE; i++ )
		Draw_Char( RCOLUMN_OFFSET + s->generic.x + i*8 + s->generic.parent->x + 8, s->generic.y + s->generic.parent->y, 129);
	Draw_Char( RCOLUMN_OFFSET + s->generic.x + i*8 + s->generic.parent->x + 8, s->generic.y + s->generic.parent->y, 130);
	Draw_Char( ( int ) ( 8 + RCOLUMN_OFFSET + s->generic.parent->x + s->generic.x + (SLIDER_RANGE-1)*8 * s->range ), s->generic.y + s->generic.parent->y, 131);
}

void SpinControl_DoEnter( menulist_s *s )
{
	s->curvalue++;
	if ( s->itemnames[s->curvalue] == 0 )
		s->curvalue = 0;

	if ( s->generic.callback )
		s->generic.callback( s );
}

void SpinControl_DoSlide( menulist_s *s, int dir )
{
	s->curvalue += dir;

	if ( s->curvalue < 0 )
		s->curvalue = 0;
	else if ( s->itemnames[s->curvalue] == 0 )
		s->curvalue--;

	if ( s->generic.callback )
		s->generic.callback( s );
}

void SpinControl_Draw( menulist_s *s )
{
	char buffer[100];

	if ( s->generic.name )
	{
		Menu_DrawStringR2LDark( s->generic.x + s->generic.parent->x + LCOLUMN_OFFSET, 
							s->generic.y + s->generic.parent->y, 
							s->generic.name );
	}
	if ( !strchr( s->itemnames[s->curvalue], '\n' ) )
	{
		Menu_DrawString( RCOLUMN_OFFSET + s->generic.x + s->generic.parent->x, s->generic.y + s->generic.parent->y, s->itemnames[s->curvalue] );
	}
	else
	{
		strcpy( buffer, s->itemnames[s->curvalue] );
		*strchr( buffer, '\n' ) = 0;
		Menu_DrawString( RCOLUMN_OFFSET + s->generic.x + s->generic.parent->x, s->generic.y + s->generic.parent->y, buffer );
		strcpy( buffer, strchr( s->itemnames[s->curvalue], '\n' ) + 1 );
		Menu_DrawString( RCOLUMN_OFFSET + s->generic.x + s->generic.parent->x, s->generic.y + s->generic.parent->y + 10, buffer );
	}
}