campo-sirio/include/controls.cpp

#if XVT_OS == XVT_OS_WIN
#define STRICT
#include <windows.h>
#endif

#include <colors.h>
#include <config.h>
#include <controls.h>
#include <mask.h>
#include <urldefid.h>
#include <window.h>

#ifndef STX_DATA
// Very deep hacking
typedef struct _stx_data
{
  int cid;
  WINDOW win;
  RCT rct;
  unsigned long attrib;
} STX_DATA;

#endif

short get_focus_id(WINDOW win)
{
  XI_OBJ * itf = xi_get_itf(win);
  XI_OBJ * obj = xi_get_focus(itf);

  if (obj == NULL || obj->type == XIT_ITF)
   return -1;
  if (obj->type == XIT_CELL || (obj->type == XIT_BTN && obj->v.btn->type == XIBT_RADIOBTN))
    obj = obj->parent;
  return obj->cid;
}


// #define CAMPI_SCAVATI FALSE
HIDDEN int X_FU_MULTIPLE = 0;
HIDDEN int Y_FU_MULTIPLE = 0;
HIDDEN const int ITF_CID = 30000;

KEY TControl::xiev_to_key(const XI_EVENT* xiev)
{
  KEY key = xiev->v.chr.ch;
  if (key < K_INS || key > K_HELP)
  {
    if (xiev->v.chr.shift && (key < ' ' || key >= K_UP)) key += K_SHIFT;
    if (xiev->v.chr.control && key >=  ' ') key += K_CTRL;
  }
  return key;
}


// @doc INTERNAL

///////////////////////////////////////////////////////////
// TPicture_array
///////////////////////////////////////////////////////////

class TPicture_array : public TArray
{
public:
  TImage& add(short id, bool convert = FALSE);

  const TImage& image(short id) const { return (const TImage&)operator[](id); }
  bool exist(short id) const { return objptr(id) != NULL; }

  TPicture_array() : TArray(128) {}
  virtual ~TPicture_array() {}
};

TImage& TPicture_array::add(short id, bool convert)
{
  TImage* i = (TImage*)objptr(id);

  if (i == NULL)
  {
    i = new TImage(id);
    TArray::add(i, id);
    if (convert)
      i->convert_transparent_color();
  }

  return *i;
}

///////////////////////////////////////////////////////////
// Utility functions
///////////////////////////////////////////////////////////

HIDDEN TPicture_array* _picture = NULL;
HIDDEN XVT_FNTID DEF_FONT = NULL;
HIDDEN XVT_FNTID FAT_FONT = NULL;

XVT_FNTID xvt_default_font(bool bold)
{
  if (DEF_FONT == NULL)
  {
    DEF_FONT = xvt_dwin_get_font(TASK_WIN);

    TConfig font(CONFIG_USER, "Font");
    TString font_ser_desc(font.get("FontDesc"));
    if (font_ser_desc.empty())
      font_ser_desc << "01\\Courier\\0\\10\\WIN01/-13/0/0/0/400/0/0/0/0/1/2/1/49/Courier";
    xvt_font_deserialize(DEF_FONT, (char *)(const char *) font_ser_desc);
    xvt_font_map_using_default(DEF_FONT);
    CHECK(xvt_font_is_mapped(DEF_FONT), "Can't map native font");

    xvt_dwin_set_font(TASK_WIN, DEF_FONT);
    xvt_menu_set_font_sel(TASK_WIN, DEF_FONT);

    FAT_FONT = xvt_font_create();
    xvt_font_copy(FAT_FONT, DEF_FONT, XVT_FA_ALL);
    xvt_font_set_style(FAT_FONT, XVT_FS_BOLD);
    xvt_font_map_using_default(FAT_FONT);
    CHECK(xvt_font_is_mapped(FAT_FONT), "Can't map native font");
    // Get true text size
#if XVT_OS == XVT_OS_WIN
    TEXTMETRIC tm;
    HDC hdc = (HDC)xvt_vobj_get_attr(TASK_WIN, ATTR_NATIVE_GRAPHIC_CONTEXT);
    GetTextMetrics(hdc, &tm);

    const int COLX = GetSystemMetrics(SM_CXSCREEN) / 80;
    CHARX = tm.tmAveCharWidth+1;
    if (CHARX > COLX) CHARX = COLX;

    CHARY = tm.tmHeight;
    BASEY = tm.tmAscent;
    if (CHARY > ROWY-2) CHARY = ROWY-2;
#endif
  }

  return bold ? FAT_FONT : DEF_FONT;
}

static byte event_map[XIE_POST_NAVIGATION+1];
enum event_action { a_ignore, a_xvt, a_xvt_post, a_obj, a_child, a_update, a_select, a_post, a_debug };

void init_controls()
{
  xi_set_font_id(xvt_default_font());

  xi_set_pref(XI_PREF_NATIVE_CTRLS, FALSE);
  xi_set_pref(XI_PREF_3D_LOOK,      TRUE);

  xi_set_pref(XI_PREF_COLOR_LIGHT,    MASK_LIGHT_COLOR);
  xi_set_pref(XI_PREF_COLOR_CTRL,     MASK_BACK_COLOR);
  xi_set_pref(XI_PREF_COLOR_DARK,     MASK_DARK_COLOR);
  xi_set_pref(XI_PREF_COLOR_DISABLED, DISABLED_COLOR);

//  xi_set_pref(XI_PREF_AUTOSEL_ON_MOUSE, TRUE); // Da' problemi nelle ricerche
  xi_set_pref(XI_PREF_CARET_WIDTH,  2);

  xi_init();

  event_map[XIE_CHAR_FIELD]     = a_obj;
  event_map[XIE_DBL_FIELD]      = a_obj;
  event_map[XIE_CHG_FIELD]      = a_obj;
  event_map[XIE_OFF_FIELD]      = a_obj;
  event_map[XIE_ON_FIELD]       = a_obj;
  event_map[XIE_OFF_GROUP]      = a_ignore;
  event_map[XIE_ON_GROUP]       = a_ignore;
  event_map[XIE_OFF_FORM]       = a_ignore;
  event_map[XIE_ON_FORM]        = a_ignore;
  event_map[XIE_VIR_PAN]        = a_ignore;
  event_map[XIE_XVT_EVENT]      = a_xvt;
  event_map[XIE_XVT_POST_EVENT] = a_xvt_post;
  event_map[XIE_INIT]           = a_ignore;
  event_map[XIE_BUTTON]         = a_obj;
  event_map[XIE_CHAR_CELL]      = a_child;
  event_map[XIE_CLEANUP]        = a_ignore;
  event_map[XIE_CLOSE]          = a_ignore;
  event_map[XIE_COMMAND]        = a_ignore;
  event_map[XIE_DBL_CELL]       = a_child;
  event_map[XIE_GET_FIRST]      = a_obj;
  event_map[XIE_GET_LAST]       = a_obj;
  event_map[XIE_GET_NEXT]       = a_obj;
  event_map[XIE_GET_PERCENT]    = a_obj;
  event_map[XIE_GET_PREV]       = a_obj;
  event_map[XIE_CELL_REQUEST]   = a_obj;
  event_map[XIE_CHG_CELL]       = a_child;
  event_map[XIE_OFF_CELL]       = a_child;
  event_map[XIE_ON_CELL]        = a_child;
  event_map[XIE_OFF_ROW]        = a_child;
  event_map[XIE_ON_ROW]         = a_child;
  event_map[XIE_OFF_COLUMN]     = a_ignore;
  event_map[XIE_ON_COLUMN]      = a_ignore;
  event_map[XIE_OFF_LIST]       = a_obj;
  event_map[XIE_ON_LIST]        = a_obj;
  event_map[XIE_REC_ALLOCATE]   = a_ignore;
  event_map[XIE_REC_FREE]       = a_ignore;
  event_map[XIE_ROW_SIZE]       = a_ignore;
  event_map[XIE_SELECT]         = a_select;
  event_map[XIE_UPDATE]         = a_update;
  event_map[XIE_COL_DELETE]     = a_ignore;
  event_map[XIE_COL_MOVE]       = a_ignore;
  event_map[XIE_COL_SIZE]       = a_ignore;
  event_map[XIE_POST_NAVIGATION]= a_post;

  if (_picture == NULL)
    _picture = new TPicture_array;
}

void free_controls()
{
  if (_picture)
  {
    delete _picture;
    _picture = NULL;
  }
  if (DEF_FONT)
  {
    xvt_font_destroy(DEF_FONT);
    DEF_FONT = NULL;
  }
  if (FAT_FONT)
  {
    xvt_font_destroy(FAT_FONT);
    FAT_FONT = NULL;
  }
}

///////////////////////////////////////////////////////////
// Interface creation
///////////////////////////////////////////////////////////

HIDDEN void xi_event_handler(XI_OBJ *itf, XI_EVENT *xiev);

WINDOW create_interface(WINDOW parent, short x, short y, short dx, short dy,
                        const char* caption, TWindow* msk, bool tag)
{
  if (parent == NULL_WIN)
    parent = TASK_WIN;

  short left   =  x * CHARX;
  short top    =  y * ROWY;
  short width  = dx * CHARX;
  short height = dy * ROWY;

  if (x <= 0 || y <= 0 || dx <= 0 || dy <= 0)
  {
    RCT max; xvt_vobj_get_client_rect(parent, &max);
    if (parent == TASK_WIN)
      max.bottom -= 26;              // Non contare la status bar

    if (dy <= 0)
      height = max.bottom - top + dy * ROWY;

    if (dx <= 0)
    {
      width = max.right - left + dx * CHARX;
      if (!tag && dx == 0 && y > 0)           // Aggiusta toolbar
        top++;
    }

    if (x < 0) left = (max.right - width) >> 1;
    if (y < 0) top = (max.bottom - height) >> 1;
  }
  RCT r; xvt_rect_set(&r, left, top, left+width, top+height);

  const WIN_TYPE wt = (dx == 0) ? W_PLAIN : W_DOC;
  long wsf = WSF_INVISIBLE | WSF_NO_MENUBAR;

  WINDOW win = xvt_win_create(wt, &r, (char*)caption, NULL, parent, wsf,
                              EM_ALL, (EVENT_HANDLER)xi_event, (long)msk);
  CHECK(win, "Can't create an XVT window for an interface");

  XI_OBJ_DEF* def = xi_create_itf_def(ITF_CID, xi_event_handler, &r, (char*)caption, (long)msk);
  CHECK(def, "Can't define an interface");

  def->v.itf->automatic_back_color = FALSE;
  def->v.itf->back_color = MASK_BACK_COLOR;
  def->v.itf->tab_on_enter = TRUE;
  def->v.itf->win = win;

  XI_OBJ* itf = xi_create(NULL, def);
  CHECK(itf, "Can't create an interface");

  xi_dequeue();
  xi_tree_free(def);

  if (Y_FU_MULTIPLE == 0)
  {
    RCT max; xvt_vobj_get_client_rect(TASK_WIN, &max);
    xi_pu_to_fu(itf, (PNT*)&max, 2);
    X_FU_MULTIPLE = max.right  / 80;
    Y_FU_MULTIPLE = max.bottom / 25;

    PNT f1 = { XI_FU_MULTIPLE, XI_FU_MULTIPLE };
    xi_fu_to_pu(itf, &f1, 1);
    const int spacing = ROWY - f1.v;
    if (spacing > 0)
      xi_set_pref(XI_PREF_VERT_PIXEL_SPACING, spacing);
  }

  if (dx > 0)
  {
    xi_pu_to_fu(itf, (PNT*)&r, 2);
    r.right  = r.left + (dx+1) * XI_FU_MULTIPLE;
    r.bottom = r.top  + (dy+1) * Y_FU_MULTIPLE;
    xi_fu_to_pu(itf, (PNT*)&r, 2);
    xvt_vobj_move(win, &r);
  }

  if (tag)
  {
    XI_RCT rct; xi_get_xi_rct(itf, &rct);
    rct.top += Y_FU_MULTIPLE;                // Lascia lo spazio per i Bottoni di cambio pagina

    def = xi_add_rect_def(NULL, DLG_PAGETAGS, &rct, XI_ATR_VISIBLE, 0, 0);
    XI_OBJ* obj = xi_create(itf, def);
    CHECK(obj, "Can't create page rectangle");

    // Fa coincidere esattamente il rettangolo con la finestra che lo contiene
    RCT& rect = obj->v.rect->rct;
    const int oldy = rect.top;
    xvt_vobj_get_client_rect(win, &rect);
    rect.top = oldy;

    xi_dequeue();
    xi_tree_free(def);
  }

  return win;
}

void attach_interface(WINDOW win, COLOR back)
{
  xvt_win_set_handler(win, (EVENT_HANDLER)xi_event);
  RCT rc; xvt_vobj_get_client_rect(win, &rc);
  WINDOW wp = xvt_vobj_get_parent(win);
  xvt_vobj_translate_points(win, wp, (PNT*)&rc, 2);
  char caption[80]; xvt_vobj_get_title(win, caption, 80);
  TWindow* parent = (TWindow*)xvt_vobj_get_data(win);
  XI_OBJ_DEF* def = xi_create_itf_def(ITF_CID, xi_event_handler, &rc, caption, (long)parent);
  CHECK(def, "Can't define an interface");

  def->v.itf->automatic_back_color = FALSE;
  def->v.itf->back_color = back;
  def->v.itf->tab_on_enter = TRUE;
  def->v.itf->win = win;

  XI_OBJ* itf = xi_create(NULL, def);
  CHECK(itf, "Can't create an interface");

  xi_dequeue();
  xi_tree_free(def);
}

HIDDEN void xi_event_handler(XI_OBJ* itf, XI_EVENT* xiev)
{
  static bool notify_xvt = TRUE;

  TControl* ctl = NULL;

  switch (event_map[xiev->type])
  {
  case a_obj:
    ctl = (TControl*)xi_get_app_data(xiev->v.xi_obj);
    break;
  case a_child:
    ctl = (TControl*)xi_get_app_data(xiev->v.xi_obj->parent);
    break;
  case a_update:
    {
      int num;
      XI_OBJ** button = xi_get_member_list(itf, &num);
      for (int i = num-1; i >= 0; i--)
      {
        XI_OBJ* b = button[i];
        if (b->type == XIT_BTN && b->v.btn->drawable)
        {
          if (xvt_rect_intersect(NULL, &b->v.btn->rct, &xiev->v.xvte.v.update.rct))
          {
            TPushbutton_control* p = (TPushbutton_control*)b->app_data;
            p->update();
          }
        }
      }
    }
    break;
  case a_select:
    if (xiev->v.xi_obj->type == XIT_LIST)
      ctl = (TControl*)xi_get_app_data(xiev->v.xi_obj);
    else
      ctl = (TControl*)xi_get_app_data(xiev->v.xi_obj->parent);
    break;
  case a_xvt:
    if (xiev->v.xvte.type == E_CHAR)
    {
      XI_OBJ* fo = xi_get_focus(itf);
      if (fo != NULL && fo->type == XIT_CELL)
        ctl = (TControl*)xi_get_app_data(fo->parent);
    }
    break;
  case a_xvt_post:
    if (notify_xvt)
    {
      TWindow* w = (TWindow*)xi_get_app_data(itf);
      CHECK(w, "Can't send XVT event to a null window");
      w->handler(w->win(), &xiev->v.xvte);
    }
    else
      notify_xvt = TRUE;
    break;
  case a_post:
    {
      XI_OBJ * obj = xi_get_focus(itf);


      if ((obj != NULL && obj->type != XIT_ITF))
      {
        if ((obj->type == XIT_CELL || (obj->type == XIT_BTN && obj->v.btn->type == XIBT_RADIOBTN)))
          obj = obj->parent;
        CHECK(obj != NULL, "Unexpected null obj");
        ctl = (TControl*)xi_get_app_data(obj);
      }
    }
    break;
  case a_debug:
    break;         // Put your breakpoint here
  default:
    break;
  }

  if (ctl != NULL)
  {
    const bool ok = ctl->event_handler(itf, xiev);
    if (!ok)
    {
      xiev->refused = TRUE;
      if (xiev->type == XIE_CHAR_FIELD || xiev->type == XIE_CHAR_CELL ||
          xiev->type == XIE_XVT_EVENT)
        notify_xvt = FALSE;
    }
  }
}

///////////////////////////////////////////////////////////
// TControl
///////////////////////////////////////////////////////////

// @doc INTERNAL

TControl::TControl()
        : _obj(NULL), _fld(NULL)
{}

// Virtual destructor needed to make derived descrutors live!
TControl::~TControl()
{}

XI_OBJ* TControl::get_interface(WINDOW win) const
{
  XI_OBJ* itf;
  if (win == NULL_WIN)
  {
    CHECK(_obj, "Can't get the interface from NULL XI object");
    itf = _obj->itf;
  }
  else
  {
    itf = xi_get_itf(win);
    CHECK(itf, "Can't get the interface from a window");
  }
  return itf;
}

void TControl::set_tab_cid(short cid)
{
  CHECK(_obj, "Can't update tab_cid of a NULL control");
  switch(_obj->type)
  {
  case XIT_BTN:
    _obj->v.btn->tab_cid = cid; break;
  case XIT_CONTAINER:
    _obj->v.container->tab_cid = _obj->cid;
    if (_obj->nbr_children > 0)
      _obj->children[_obj->nbr_children-1]->v.btn->tab_cid = cid;
    break;
  case XIT_FIELD:
    _obj->v.field->tab_cid = cid;
    _obj->parent->v.form->tab_cid = _obj->parent->cid;
    break;
  case XIT_LIST:
    _obj->v.list->tab_cid = cid; break;
  default:
    NFCHECK(0, "Can't set tab_cid to a static control: ", _obj->cid); break;
  }
}


TControl& TControl::find_operable_ctl(bool forward) const
{
  int num;
  XI_OBJ** child = xi_get_member_list(get_interface(), &num);
  const int first = forward ? 0 : num-2;
  const int last  = forward ? num-1 : -1;
  const int delta = forward ? +1 : -1;
  XI_OBJ* obj = NULL;
  for (int c = first; c != last && obj == NULL; c += delta)
  {
    const XI_OBJ_TYPE t = child[c]->type;
    if (t == XIT_FORM || t == XIT_BTN || t == XIT_LIST || t == XIT_CONTAINER)
      obj = child[c];
  }
  TControl* ctl = obj == NULL ? (TControl*)this : (TControl*)xi_get_app_data(obj);
  CHECK(ctl, "Can't update NULL control");
  return *ctl;
}

void TControl::update_tab_cid()
{
  TControl& lc = find_operable_ctl(FALSE);
  lc.set_tab_cid(id());

  const TControl& fc = find_operable_ctl(TRUE);
  set_tab_cid(fc.id());
}


void TControl::coord2rct(WINDOW win, short x, short y, short dx, short dy, XI_RCT& rct) const
{
  // Spazio da lasciare prima di toccare i bordi
  const int X_FU_DELTA = XI_FU_MULTIPLE / 4;
  const int Y_FU_DELTA = XI_FU_MULTIPLE / 8;

  XI_OBJ* itf = get_interface(win);

  // Se ci sono i tab controls sulla pagina salta una riga
  if (y >= 0)
  {
    int num;
    XI_OBJ** child = xi_get_member_list(itf, &num);
    if (num > 0 && child[0]->cid == DLG_PAGETAGS)
      y++;
  }

  RCT max; xvt_vobj_get_client_rect(win, &max);
  xi_pu_to_fu(itf, (PNT*)&max, 2);
  const int& MAXX = max.right;
  const int& MAXY = max.bottom;

  int width = XI_FU_MULTIPLE;
  if (dx > 0)
    width = dx * XI_FU_MULTIPLE;

  int height = XI_FU_MULTIPLE;
  if (dy > 1)
    height += (dy-1) * Y_FU_MULTIPLE;

  if (x < 0)
  {
    x = -x;
    if (x > 10)
    {
      const int num = x / 10 -1;
      const int tot = x % 10;
      const int spc = (MAXX - tot*width) / (tot+1);
      rct.left = spc + num * (spc+width);
    }
    else
      rct.left = MAXX - width - x * XI_FU_MULTIPLE;
  }
  else
  {
    rct.left = x * XI_FU_MULTIPLE + X_FU_DELTA;

    if (dx > 0 && MAXX > 80 * XI_FU_MULTIPLE)
      rct.left += (MAXX - 80 * XI_FU_MULTIPLE) / 2;
  }

  if (y < 0)
  {
    y = -y;
    if (y > 10)
    {
      const int num = y / 10 -1;
      const int tot = y % 10;
      const int spc = (MAXY - tot*height) / (tot+1);
      rct.top = spc + num * (spc+height);
    }
    else
      rct.top = MAXY - height - (y-1) * Y_FU_MULTIPLE - Y_FU_DELTA;
  }
  else
    rct.top = y * Y_FU_MULTIPLE + Y_FU_DELTA;

  if (dx > 0)
    rct.right = rct.left + width;
  else
    rct.right = MAXX + (dx-1) * XI_FU_MULTIPLE - X_FU_DELTA;

  if (dy > 0)
    rct.bottom = rct.top + height;
  else
    rct.bottom = MAXY + dy * Y_FU_MULTIPLE - X_FU_DELTA;
}

RCT& TControl::get_rect(RCT& r) const
{
  xi_get_rect(_obj, &r);
  return r;
}

void TControl::set_rect(const RCT&)
{
  CHECK(0, "Can't set_rect to generic TControl");
}

unsigned long TControl::flags2attr(const char* flags) const
{
  unsigned long attrib = XI_ATR_VISIBLE | XI_ATR_ENABLED;
  for (const char* f = flags; *f; f++)
  {
    switch(toupper(*f))
    {
      case '*': attrib |= XI_ATR_PASSWORD; break;
      case 'C': attrib |= XI_ATR_HCENTER;  break;
      case 'D': attrib &= ~XI_ATR_ENABLED; break;
      case 'H': attrib &= ~XI_ATR_VISIBLE; break;
      case 'R': attrib |= XI_ATR_RJUST;    break;
      default : break;
    }
  }
  return attrib;
}

const char* TControl::parse_caption(const char* cap, bool& bold, COLOR& color) const
{
  bold = FALSE;
  color = NORMAL_COLOR;
  for (const char* t = cap; *t == '@' || *t == '$'; t++)
  {
    if (*t == '@')
    {
      const char code = toupper(*(t+1));
      if (code == 'B')
      {
        bold = TRUE;
        t++;
      }
      else
      {
        NFCHECK(0, "Bad character after @ in prompt");
        break;
      }
    }
    else
    {
      if (*(t+1) == '[')
      {
        t += 2;                          // Skip [
        if (isalpha(*t))
           color = trans_color(*t);
        else
        {
          int r = 0, g = 0, b = 0;
          sscanf(t, "%d,%d,%d", &r, &g, &b);
          color = MAKE_COLOR(r, g, b);
        }
        while (*t && *t != ']') t++;
      }
      else
      {
        NFCHECK(0, "Bad character after $ in prompt");
        break;
      }
    }
  }
  return t;
}

WINDOW TControl::parent() const
{
  return xi_get_window(_obj->itf);
}

void TControl::set_focus() const
{
  xi_set_focus(_obj);
}

bool TControl::notify_key(KEY k)
{
  bool ok = TRUE;

  if (_fld == NULL)
  {
    TWindow* msk = (TWindow*)xi_get_app_data(get_interface());
    CHECK(msk, "Can't get TMask from XI interface");
    if (msk->is_kind_of(CLASS_MASK))
    {
      const TMask& m = (TMask&)*msk;
      const int pos = m.id2pos(id());
      if (pos >= 0)
        _fld = &m.fld(pos);
    }
  }
  if (_fld)
    ok = _fld->on_key(k);

  return ok;
}

bool TControl::is_edit_key(KEY k) const
{
  return k >= ' ' && k < 255 && k != K_DEL;
}

bool TControl::event_handler(XI_OBJ* itf, XI_EVENT* xiev)
{
  bool ok = TRUE;
  return ok;
}

void TControl::change_attrib(unsigned long mask, bool on, XI_OBJ* obj)
{
  if (obj == NULL) obj = _obj;
  const unsigned long old_attr = xi_get_attrib(obj);
  unsigned long attr = old_attr;
  if (on) attr |= mask;
  else    attr &= ~mask;
  if (attr != old_attr)     // C'e' un vero cambiamento d'attributo
  {
    // Se la finestra e' chiusa e il campo e un bottone o e' editabile allora cambia l'attributo
    // senza ridisegnare il campo, il che provocherebbe problemi di funzionamento degli sheet
    if (_obj->type == XIT_BTN || _obj->type == XIT_FIELD)
    {
      const TWindow* w = (const TWindow*)_obj->itf->app_data;
      if (!w->is_open())
      {
        if (_obj->type == XIT_FIELD)
          ((STX_DATA*)_obj->v.field->stx)->attrib = attr;
        else
          _obj->v.btn->attrib = attr;
        return;
      }
    }
    // Usa tranquillamente il metodo ortodosso
    xi_set_attrib(obj, attr);
  }
}

// @doc INTERNAL

// @mfunc Mostra/Nasconde il controllo
void TControl::show(
     bool on)  // @parm Operazione da svolgere sul controllo:
         // @flag TRUE | Il controllo viene mostrato
         // @flag FALSE | Il controllo viene nascosto
{
  change_attrib(XI_ATR_VISIBLE, on);
}

// @doc INTERNAL

// @mfunc Abilita/disabilita il controllo
void TControl::enable(
     bool on)  // @parm Operazione da svolgere sul controllo:
         // @flag TRUE | Il controllo viene abilitato
         // @flag FALSE | Il controllo viene disabilitato
{
  change_attrib(XI_ATR_ENABLED, on);
}

// @mfunc Abilita/disabilita l'autoselezione del testo
void TControl::autoselect(bool on)
{
  change_attrib(XI_ATR_AUTOSELECT, on);
}

// @doc INTERNAL

const char* TControl::caption() const
{
  const char* c = xi_get_text(_obj, NULL, 512);
  return c;
}

void TControl::set_caption(const char* c)
{
  xi_set_text(_obj, (char*)c);
}

///////////////////////////////////////////////////////////
// TText
///////////////////////////////////////////////////////////

TText_control::TText_control(WINDOW win, short cid,
                             short left, short top, short width, short height,
                             const char* flags, const char* text)
{
  bool bold;
  COLOR color;
  TString t = parse_caption(text, bold, color);
  t.rtrim();
  if (width <= 0)
    width = t.len();

  XI_RCT rct; coord2rct(win, left, top, width, height, rct);
  rct.right += bold ? (width*XI_FU_MULTIPLE/4) : XI_FU_MULTIPLE;

  const unsigned long attrib = flags2attr(flags);
  XI_OBJ_DEF* def = xi_add_text_def(NULL, cid, &rct, attrib, (char*)(const char*)t);
  CHECKS(def, "Can't create the definition of TText_control:", text);
  def->v.text->fore_color = color;
  if (bold)
    def->v.text->font_id = xvt_default_font(TRUE);
  _obj = xi_create(get_interface(win), def);
  CHECKS(_obj, "Can't create TText_control ", text);

  xi_dequeue();
  xi_tree_free(def);
}

void TText_control::set_caption(const char* text)
{
  bool bold;
  COLOR color;
  const char* c = parse_caption(text, bold, color);
  xi_set_text(_obj, (char*)c);
  _obj->v.text->fore_color = color;
}


///////////////////////////////////////////////////////////
// TGroupbox_control
///////////////////////////////////////////////////////////

TGroupbox_control::TGroupbox_control(WINDOW win, short cid,
                                     short left, short top, short width, short height,
                                     const char* flags, const char* text)
                 : TText_control(win, cid, left, top, width, 1, flags, text)
{
  // Alza di un pixel il rettangolo per non coprire il rettangolo
  RCT& tr = _obj->v.text->rct;
  tr.top--; tr.bottom--;

  XI_RCT rct; coord2rct(win, left, top, width, height, rct);
  rct.top += XI_FU_MULTIPLE - 2;
  rct.bottom -= Y_FU_MULTIPLE / 2;

  XI_OBJ_DEF* def = xi_add_rect_def(NULL, cid, &rct, XI_ATR_VISIBLE, 0, 0); // Ignore colors
  CHECKS(def, "Can't create the definition of TGroupbox_control ", text);
  def->v.rect->hilight_color = MASK_LIGHT_COLOR;
  def->v.rect->back_color    = MASK_BACK_COLOR;
  def->v.rect->shadow_color  = MASK_DARK_COLOR;

  const bool erre = strchr(flags, 'R') != NULL;
  if (erre)
  {
    def->v.rect->well = TRUE;                  // Mette in rilievo il rettangolo
    change_attrib(XI_ATR_RJUST, FALSE, _obj);  // Toglie l'erroneo allineamento a destra del titolo
  }
  _rct = xi_create(get_interface(win), def);
  CHECKD(_rct, "Can't create Groupbox_control ", cid);

  RCT& rt = _obj->v.text->rct;
  rt.top--; rt.bottom--;

  xi_dequeue();
  xi_tree_free(def);
}

void TGroupbox_control::show(bool on)
{
  TText_control::show(on);
  change_attrib(XI_ATR_VISIBLE, on, _rct);
}

///////////////////////////////////////////////////////////
// TField
///////////////////////////////////////////////////////////

static bool in_create = FALSE;

TField_control::TField_control(WINDOW win, short cid,
                               short left, short top, short width, short maxlen,
                               const char* flags, const char* text)
{
  const bool button = strchr(flags, 'B') != NULL;
  create(win, cid, left, top, width, 1, maxlen, flags, text, button);
}

void TField_control::create(WINDOW win, short cid,
                       short left, short top, short width, short height, short maxlen,
                       const char* flags, const char* text, bool button)
{
  in_create = TRUE;

  const short fcid = cid + 1000;
  XI_OBJ_DEF* frm_def = xi_add_form_def(NULL, fcid, fcid);
  frm_def->app_data = (long)this;

  XI_RCT rct; coord2rct(win, left, top, width, height, rct);
  rct.right += XI_FU_MULTIPLE/4;

  unsigned long attrib = flags2attr(flags) | XI_ATR_AUTOSELECT;
  if (!CAMPI_SCAVATI)
    attrib |= XI_ATR_BORDER;
  if (maxlen > width)
    attrib |= XI_ATR_AUTOSCROLL;

  XI_OBJ_DEF* def = xi_add_field_def(frm_def, cid,
                                     rct.top, rct.left,
                                     rct.right - rct.left,
                                     attrib, cid, maxlen+1,
                                     NORMAL_COLOR, NORMAL_BACK_COLOR,
                                     NORMAL_COLOR, DISABLED_BACK_COLOR,
                                     FOCUS_COLOR);

  def->app_data = (long)this;
  XI_FIELD_DEF* f = def->v.field;
  f->well = CAMPI_SCAVATI;
  f->auto_tab = TRUE;
  f->active_back_color = FOCUS_BACK_COLOR;
  if (button)
  {
    f->button = TRUE;
    f->pixel_button_distance = 1;
  }
  if (height > 1)   // E' un multiline, quindi setto il rettangolo
    f->xi_rct = rct;

  XI_OBJ* itf = get_interface(win);
  XI_OBJ* form = xi_create(itf, frm_def);
  CHECKD(form, "Can't create the form for field ", cid);
  _obj = xi_get_obj(form, cid);
  CHECKD(_obj, "Can't create field ", cid);
  STX_DATA * stx = (STX_DATA*)_obj->v.field->stx;

  const int offset = _obj->v.field->btn_rct.left - stx->rct.right + 1;
  _obj->v.field->btn_rct.left -= offset ;
  _obj->v.field->btn_rct.right -= offset;

  update_tab_cid();

  xi_dequeue();
  xi_tree_free(frm_def);

  in_create = FALSE;
}

void TField_control::show_button(bool on)
{
  XI_FIELD_DATA* f = _obj->v.field;
  if (f->button != on)
  {
    f->button = on;
    xi_invalidate_rect(parent(), &f->btn_rct);
  }
}

bool TField_control::event_handler(XI_OBJ* itf, XI_EVENT* xiev)
{
  if (in_create)
    return FALSE;

  bool ok = TRUE;

  switch(xiev->type)
  {
  case XIE_OFF_FIELD:
    ok = notify_key(K_TAB);
    break;
  case XIE_ON_FIELD:
    notify_key(K_CTRL+K_TAB);
    break;
  case XIE_DBL_FIELD:
    notify_key(K_F9);
    break;
  case XIE_CHAR_FIELD:
    {
      KEY k = xiev_to_key(xiev);
      if (k == K_PREV || k == K_NEXT || (k >= K_CTRL+K_F1 && k <= K_CTRL+K_F12))
        k = K_TAB;
      if (k == K_TAB || is_edit_key(k) || (k > K_F1 && k < K_F12))
        ok = notify_key(k);
    }
    break;
  case XIE_CHG_FIELD:
    notify_key(K_CTRL+K_SPACE);
    break;
  case XIE_BUTTON:
    notify_key(K_F9);
    break;
  default:
    ok = TControl::event_handler(itf, xiev);
    break;
  }
  return ok;
}

void TField_control::set_focus() const
{
  TControl::set_focus();
}

///////////////////////////////////////////////////////////
// TMultiline_control
///////////////////////////////////////////////////////////
TMultiline_control::TMultiline_control(WINDOW win, short cid,
                                       short left, short top,
                                       short width, short height, short maxlen,
                                       const char* flags, const char* text)
{
  create(win, cid, left, top, width, height, maxlen, flags, text, FALSE);
}

///////////////////////////////////////////////////////////
// TButton_control
///////////////////////////////////////////////////////////

void TButton_control::create(WINDOW win, short cid,
                             short left, short top, short width, short height,
                             const char* flags, const char* text,
                             WIN_TYPE wc, XI_OBJ* container)
{
  bool bold;
  COLOR color;
  TString txt(text); txt.strip("&~");
  const char* t = parse_caption(txt, bold, color);
  if (width <= 0) width = strlen(t)+3;

  RCT rct; coord2rct(win, left, top, width, height, rct);

  const unsigned long attrib = flags2attr(flags);
  XI_OBJ_DEF* def = xi_add_button_def(NULL, cid, &rct, attrib, (char*)t, cid);
  CHECKD(def, "Can't create the interface of TButton_control ", cid);
  def->v.btn->fore_color = color;
  def->app_data = (long)this;
  switch (wc)
  {
    case WC_PUSHBUTTON : def->v.btn->type = XIBT_BUTTON; break;
    case WC_CHECKBOX   : def->v.btn->type = XIBT_CHECKBOX; break;
    case WC_RADIOBUTTON: def->v.btn->type = XIBT_RADIOBTN; break;
    default            : def->v.btn->type = XIBT_TABBTN; break;
  }

  if (container == NULL)
    container = get_interface(win);
  _obj = xi_create(container, def);
  CHECKD(_obj, "Can't create TButton_control ", cid);

  // Aggiusta bottoni con icona a sinistra
  if (wc == WC_CHECKBOX || wc == WC_RADIOBUTTON)
  {
    RCT& r = _obj->v.btn->rct;
    r.top++; r.bottom++;
    r.right += XI_FU_MULTIPLE / 2;
  }


  xi_dequeue();
  xi_tree_free(def);

  update_tab_cid();
}

XI_BTN_TYPE TButton_control::button_type() const
{
  return _obj->v.btn->type;
}

XI_OBJ* TButton_control::container() const
{
  return _obj->parent;
}

void TButton_control::check(bool on)
{
  xi_check(_obj, on);
}

bool TButton_control::checked() const
{
  return xi_is_checked(_obj) ? TRUE : FALSE;
}

bool TButton_control::toggle()
{
  const bool on = !checked();
  check(on);
  return on;
}

void TButton_control::set_rect(const RCT& r)
{
  _obj->v.btn->rct = r;
}

bool TButton_control::event_handler(XI_OBJ* itf, XI_EVENT* xiev)
{
  bool ok = TRUE;

  if (xiev->type == XIE_BUTTON)
  {
    if (xi_move_focus(_obj))
    {
      switch (_obj->v.btn->type)
      {
        case XIBT_CHECKBOX:
        case XIBT_BUTTON_CHECKBOX:
          toggle();
          break;
        default:
          break;
      }
      ok = notify_key(K_SPACE);
    }
    else
      ok = FALSE;
  }
  else
    if (xiev->type == XIE_POST_NAVIGATION)
      ok == notify_key(K_CTRL + K_TAB);
    else
      ok = TControl::event_handler(itf, xiev);

  return ok;
}

///////////////////////////////////////////////////////////
// TPushbutton_control
///////////////////////////////////////////////////////////

TPushbutton_control::TPushbutton_control(WINDOW win, short cid,
                                         short left, short top, short width, short height,
                                         const char* flags, const char* text,
                                         short bmp_up, short bmp_dn)
                   : _bmp_up(bmp_up), _bmp_dn(bmp_dn)

{
  if (bmp_up > 0)
    text = "";
  create(win, cid, left, top, width, height, flags, text, WC_PUSHBUTTON, NULL);
  set_bmp(bmp_up, bmp_dn);
}

void TPushbutton_control::set_bmp(short bmp_up, short bmp_dn)
{
  if (bmp_up > 0)
  {
    _obj->v.btn->drawable = TRUE;
    _picture->add(_bmp_up = bmp_up, TRUE);
    if (bmp_dn > 0)
      _picture->add(_bmp_dn = bmp_dn, TRUE);
    else
      _bmp_dn = _bmp_up;
    if (_obj->v.btn->text)
      *_obj->v.btn->text = '\0';
  }
  else
  {
    _obj->v.btn->drawable = FALSE;
    _bmp_up = _bmp_dn = 0;
  }
}

void TPushbutton_control::update()
{
  const long attrib = xi_get_attrib(_obj);
  if (attrib & XI_ATR_VISIBLE)
  {
    const short bmp = (_bmp_dn > 0 && _obj->v.btn->down) ? _bmp_dn : _bmp_up;
    if (bmp > 0)
    {
      const TImage& i = _picture->image(bmp);
      const RCT& rct = _obj->v.btn->rct;
      int x = rct.left + (rct.right - rct.left - i.width()) / 2;
      int y = rct.top + (rct.bottom - rct.top - i.height()) / 2;
      if (_obj->v.btn->down)
      {
        x += 2;
        y += 2;
      }

      const WINDOW w = parent();
      i.draw(w, x, y);
      if (!(attrib & XI_ATR_ENABLED))
      {
        CPEN pen;
        pen.width = 1;
        pen.pat   = PAT_SOLID;
        pen.style = P_SOLID;
        pen.color = MASK_BACK_COLOR;
        xvt_dwin_set_cpen(w, &pen);
        for (int py = y + i.height(); py >= y; py -= 2)
        {
          PNT p; p.v = py; p.h = x;
          xvt_dwin_draw_set_pos(w, p);
          p.h += i.width();
          xvt_dwin_draw_line(w, p);
        }
        for (int px = x + i.width(); px >= x; px -= 2)
        {
          PNT p; p.v = y; p.h = px;
          xvt_dwin_draw_set_pos(w, p);
          p.v += i.height();
          xvt_dwin_draw_line(w, p);
        }
      }
    }
  }
}

bool TPushbutton_control::event_handler(XI_OBJ* itf, XI_EVENT* xiev)
{
  bool ok = TButton_control::event_handler(itf, xiev);

  switch (xiev->type)
  {
    case XIE_BUTTON:
      {
        TWindow* w = (TWindow*)xi_get_app_data(get_interface());
        w->on_button(id());
      }
      break;
    default:
      break;
  }

  return ok;
}

///////////////////////////////////////////////////////////
// TCheckbox_control
///////////////////////////////////////////////////////////

TCheckbox_control::TCheckbox_control(WINDOW win, short cid,
                                     short left, short top, short width,
                                     const char* flags, const char* text)
{ create(win, cid, left, top, width, 1, flags, text, WC_CHECKBOX, NULL); }

///////////////////////////////////////////////////////////
// TRadiobutton_control
///////////////////////////////////////////////////////////

TRadiobutton_control::TRadiobutton_control(WINDOW win, short cid,
                                           short left, short top, short width, short height,
                                           const char* flags, const char* text)
{
  TToken_string testo(text); testo.strip("&~");
  const int tot = testo.items();

  const XI_CONTAINER_ORIENTATION orient = height == 1 ? XI_STACK_HORIZONTAL : XI_STACK_VERTICAL;
  XI_RCT rct; coord2rct(win, left, top, width, height, rct);

  if (height > 1)
  {
    // Aggiusta rettangolo in modo da centrare i bottoni
    const int extra = rct.bottom - rct.top - tot * XI_FU_MULTIPLE;
    if (extra > 0)
      rct.top += extra / 2;
    else
      if (extra < 0)
        rct.bottom -= extra;
  }
  XI_OBJ_DEF* def = xi_add_container_def(NULL, cid, &rct, orient, cid);
  def->app_data = (long)this;

  const unsigned long attrib = flags2attr(flags);
  for (int b = 1; b <= tot; b++)
  {
    bool bold;
    COLOR color;
    const char* t = parse_caption(testo.get(), bold, color);

    const int next = cid + (b+1)*1000;
    XI_OBJ_DEF* btn_def = xi_add_button_def(def, cid + b*1000, NULL, attrib, (char*)t, next);
    CHECKD(btn_def, "Can't create definition for radio-button ", cid);
    btn_def->app_data = (long)this;

    XI_BTN_DEF* btn = btn_def->v.btn;
    btn->type = XIBT_RADIOBTN;
    btn->fore_color = color;
    btn->checked = b == 1;
  }

  XI_OBJ* itf = get_interface(win);
  _obj = xi_create(itf, def);
  CHECKD(_obj, "Can't create radio-button container ", cid);

  update_tab_cid();

  xi_dequeue();
  xi_tree_free(def);
}

void TRadiobutton_control::show(bool on)
{
  int children;
  XI_OBJ** child = xi_get_member_list(_obj, &children);
  for (int c = children-1; c >= 0; c--)
    change_attrib(XI_ATR_VISIBLE, on, child[c]);
}

void TRadiobutton_control::enable(bool on)
{
  int children;
  XI_OBJ** child = xi_get_member_list(_obj, &children);
  for (int c = children-1; c >= 0; c--)
    change_attrib(XI_ATR_ENABLED, on, child[c]);
}

byte TRadiobutton_control::get_checked() const
{
  int children;
  XI_OBJ** child = xi_get_member_list(_obj, &children);
  for (int c = children-1; c > 0; c--)
    if (xi_is_checked(child[c])) break;
  return (byte)c;
}

void TRadiobutton_control::check_button(byte c)
{
  int children;
  XI_OBJ** child = xi_get_member_list(_obj, &children);
  CHECKD(c < children, "This radio is rather old, it doesn't have button ", c);
  if (!xi_is_checked(child[c]))
    xi_check(child[c], TRUE);
}

void TRadiobutton_control::show_button(byte c, bool on)
{
  int children;
  XI_OBJ** child = xi_get_member_list(_obj, &children);
  CHECKD(c < children, "This radio is rather old, it doesn't have button ", c);
  change_attrib(XI_ATR_VISIBLE, on, child[c]);
}

bool TRadiobutton_control::event_handler(XI_OBJ* itf, XI_EVENT* xiev)
{
  bool ok = TRUE;
  if (xiev->type == XIE_BUTTON)
  {
    XI_OBJ* obj = xiev->v.xi_obj;       // Elemento del gruppo di radio buttons da premere
    if (xi_move_focus(obj))             // Tenta di dargli il focus
    {
      if (!xi_is_checked(obj))          // Se non e' gia' premuto ...
      {
        xi_check(obj, TRUE);            // ... allora premilo e ...
        ok = notify_key(K_SPACE);       // ... avverti il mask_field proprietario
      }
    }
    else
      ok = FALSE;
  }
  else
    ok = TButton_control::event_handler(itf, xiev);
  return ok;
}

void TRadiobutton_control::set_focus() const
{
  int children;
  XI_OBJ** child = xi_get_member_list(_obj, &children);
  for (int c = children-1; c > 0; c--)
    if (xi_is_checked(child[c])) break;
  xi_set_focus(child[c]);
}


///////////////////////////////////////////////////////////
// TTagbutton_control
///////////////////////////////////////////////////////////


TTagbutton_control::TTagbutton_control(WINDOW win, short cid,
                                       short left, short top, short width, short height,
                                       const char* flags, const char* text, int tag)
{
  XI_OBJ* itf = get_interface(win);
  XI_RCT rct; xi_get_xi_rct(itf, &rct);
  rct.bottom = rct.top + Y_FU_MULTIPLE;
  XI_OBJ_DEF* cnt_def = xi_add_container_def(NULL, cid, &rct, XI_STACK_HORIZONTAL, cid);
  cnt_def->app_data = (long)this;

  const unsigned long attrib = flags2attr(flags);

  TToken_string titolo(text);
  const int tot = titolo.items();

  for (int b = 1; b <= tot; b++)
  {
    bool bold;
    COLOR color;
    const char* t = parse_caption(titolo.get(), bold, color);

    const int next_bid = b == tot ? cid+1 : cid+b+1;
    XI_OBJ_DEF* btn_def = xi_add_button_def(cnt_def, cid+b, NULL, attrib, (char*)t, next_bid);
    btn_def->v.btn->type = XIBT_TABBTN;
    btn_def->v.btn->fore_color = color;
    btn_def->v.btn->checked = tag == b-1;
    btn_def->app_data = (long)this;
  }

  _obj = xi_create(itf, cnt_def);
  CHECKD(_obj, "Can't create tab-button container ", cid);

  xi_dequeue();
  xi_tree_free(cnt_def);
}

bool TTagbutton_control::event_handler(XI_OBJ* itf, XI_EVENT* xiev)
{
  bool ok = TRUE;
  if (xiev->type == XIE_BUTTON)
  {
    XI_OBJ* obj = xiev->v.xi_obj;        // Elemento del gruppo di radio buttons da premere
    if (!xi_is_checked(obj))             // Se e' gia' selezionato ignoralo completamente
    {
      if (xi_move_focus(itf))            // Controlla se si puo' cambiare pagina
      {
        TWindow* w = (TWindow*)xi_get_app_data(itf);
        KEY k = K_CTRL + K_F1 + xiev->v.xi_obj->cid - id() - 1;
        w->on_key(k);
      }
    }
  }
  else
    ok = TRadiobutton_control::event_handler(itf, xiev);
  return ok;
}

void TTagbutton_control::set_caption(const char* text)
{
  TToken_string cap = text;
  int num;
  XI_OBJ** tag = xi_get_member_list(_obj, &num);
   for (int i = 0; i < num; i++)
  {
    text = cap.get();
    if (text == NULL)
      text = cap.get(0);
    xi_set_text(tag[i], (char*)text);
  }
}

///////////////////////////////////////////////////////////
// TListbox_control
///////////////////////////////////////////////////////////

long TDropDownList::row2rec(int row) const
{
  int rows;
  const long* handle = xi_get_list_info(_xi_lst, &rows);

  if (row < 0) row = 0;
  else
    if (row >= rows)
      row = rows-1;
  const long r = handle[row];
  CHECKD(r >= 0 && r < items(), "Sheet line out of range: ", row);

  return r;
}

int TDropDownList::rec2row(long rec) const
{
  int rows;
  const long* handle = xi_get_list_info(_xi_lst, &rows);

  int r = int(rec - handle[0]);
  if (r < 0 || r >= rows)
    r = -1;

  return r;
}


void TDropDownList::ddl_str_eh(XI_OBJ* itf, XI_EVENT* xiev)
{
   TDropDownList* ddl = (TDropDownList*)xi_get_app_data(itf);
   const char* row = NULL;
   long rec = 0l;

   if (!ddl->is_open()) return;

   switch(xiev->type)
   {
     case XIE_CELL_REQUEST:
       rec = xiev->v.cell_request.rec;
       row = ddl->item((int)rec);
       strncpy(xiev->v.cell_request.s, (char *)row, xiev->v.cell_request.len);
       xiev->v.cell_request.s[xiev->v.cell_request.len - 1] = '\0';
       break;
     case XIE_GET_FIRST:
       if (ddl->items() == 0)
         xiev->refused = TRUE;
       else
         xiev->v.rec_request.data_rec = ddl->items() * xiev->v.rec_request.percent/100;
       break;
     case XIE_GET_LAST:
       xiev->v.rec_request.data_rec = ddl->items() - 1;
       break;
     case XIE_GET_NEXT:
       if (xiev->v.rec_request.spec_rec >= ddl->items()-1)
         xiev->refused = TRUE;
       else
         xiev->v.rec_request.data_rec = xiev->v.rec_request.spec_rec + 1;
       break;
     case XIE_GET_PREV:
       if (xiev->v.rec_request.spec_rec == 0)
         xiev->refused = TRUE;
       else
         xiev->v.rec_request.data_rec = xiev->v.rec_request.spec_rec - 1;
       break;
     case XIE_GET_PERCENT:
       if (ddl->items() > 1)
          xiev->v.get_percent.percent = (int)((xiev->v.get_percent.record * 100l)/((long)ddl->items()-1l));
       break;
     case XIE_DBL_CELL:
       ddl->select((int)(ddl->row2rec(xiev->v.xi_obj->v.cell.row)));
       ddl->close();
      break;
     case XIE_ON_ROW:
       if (ddl->displayed())
         ddl->select((int)(ddl->row2rec(xiev->v.xi_obj->v.row)));
       break;
     case XIE_XVT_EVENT:
       if ((xiev->v.xvte.type == E_FOCUS && xiev->v.xvte.v.active == FALSE) || xiev->v.xvte.type == E_MOUSE_UP)
         ddl->close();
       else if (xiev->v.xvte.type == E_CHAR)
       {
         const KEY k = xiev->v.xvte.v.chr.ch;
         if (k == K_ENTER || k == K_ESC)
           ddl->close();
         else
           if (k >= ' ' && k <= 'z')
             ddl->select_by_initial(k);
       }
       break;
     case XIE_CHAR_CELL:   // TBI: questa e' copiata da edit
        break;
     default:
       break;
   }
}

void TDropDownList::close()
{
  if (_open)
  {
    _open = _displayed = FALSE;
    xvt_vobj_destroy(xi_get_window(_xi_lst->itf));
    xvt_dwin_update (xi_get_window(_obj->itf));
  }
}

bool TDropDownList::select(int i, bool force)
{
  if (force || i != _selected)
  {
    _selected = i;

    if (_obj->type == XIT_FIELD)
    {
      xi_set_text(_obj, (char*)_values.get(i));
      TListbox_control* listbox = (TListbox_control *)xi_get_app_data(_obj);
      listbox->notify_key(K_SPACE);
    }
    else
      xi_set_text(_obj, (char*)_codes.get(i));

    if (is_open())
    {
      int r = rec2row(i);
      if (r < 0)
      {
        xi_scroll_rec(_xi_lst, i, FOCUS_COLOR, XI_ATR_ENABLED, 0);
        r = rec2row(i);
      }
      CHECKD(r >= 0, "Can't select listbox item ", r);
      XI_OBJ cell; XI_MAKE_CELL(&cell, _xi_lst, r, 0);
      xi_set_focus(&cell);
    }

    return TRUE;
  }

  return FALSE;
}

bool TDropDownList::select_by_initial(char c)
{
  int next  = _selected < _values.items() - 1 ?  _selected + 1 : 0;
  int first = -1;
  for (int i = 0; i < _values.items(); i++)
    if (toupper(*(_values.get(i))) == toupper(c))
    {
      first = i;
      break;
    }
  if (first == -1)
    return FALSE;

  for (i = next; i < _values.items(); i++)
    if (toupper(*(_values.get(i))) == toupper(c))
      break;
  if (i == _values.items() && first >= 0)
    i = first;

  return select(i);
}

bool TDropDownList::select_by_ofs(int i)
{
  i += _selected;
  if (i >= 0 && i < _values.items())
    return select(i);
  return FALSE;
}

TDropDownList::TDropDownList(XI_OBJ* o, const char* codes, const char* values, int width)
  : _obj(o), _codes(codes), _values(values),
    _open(FALSE), _xi_lst(NULL), _width(width),
    _displayed(FALSE), _selected(0)
{}

void TDropDownList::set_values(const char* c, const char* v)
{
  _codes = c;
  _values = v;
}

void TDropDownList::open()
{
  if (_open) return;

  XI_OBJ_DEF* itfdef = xi_create_itf_def(ITF_CID, (XI_EVENT_HANDLER)ddl_str_eh, NULL, "",
                                         (long)this);
  // qui si vedra' se e cosa modificare
  itfdef->v.itf->automatic_back_color = TRUE;
  // compute size of field with button

  RCT r; xi_get_rect(_obj, &r);

  XI_RCT xr = r;
  xi_pu_to_fu(_obj->itf, (PNT*)&xr, 2);

  if (_width == 0)  // usually in spreadsheet cells
    _width = (xr.right - xr.left)/XI_FU_MULTIPLE;

  if ((xr.right - xr.left) < (_width * XI_FU_MULTIPLE))
  {
    xr.right = xr.left + (_width * XI_FU_MULTIPLE);
    r = xr;
    xi_fu_to_pu(_obj->itf, (PNT*)&r, 2);
  }

  int hei = items() <= 1 ? 2*XI_FU_MULTIPLE + 1 : (min(6,items()) * XI_FU_MULTIPLE) + 1;
  XI_OBJ_DEF* lstdef = xi_add_list_def(itfdef, _obj->cid+1000, 0, 0, hei,
                                       XI_ATR_ENABLED|XI_ATR_VISIBLE, NORMAL_COLOR, NORMAL_BACK_COLOR,
                                       DISABLED_COLOR, DISABLED_BACK_COLOR, FOCUS_COLOR, 0);

  lstdef->v.list->active_back_color = FOCUS_BACK_COLOR;
  lstdef->v.list->scroll_bar = items() > 6;
  lstdef->v.list->no_heading = TRUE;
  lstdef->v.list->no_horz_lines = TRUE;
  lstdef->v.list->no_vert_lines = TRUE;
  lstdef->v.list->resize_with_window = TRUE;

/*
  int len;
  if (_in_cell)
    len = items() <= 6 ?  r.right - r.left - 2 : (_width-1) * XI_FU_MULTIPLE;
  else
    len  = items() <= 6 ?  _obj->v.field->rct.right - _obj->v.field->rct.left - 2 :
          (_width-1) * XI_FU_MULTIPLE;
*/
  int len = xr.right - xr.left - 2;
  if (items() > 6) len = (_width-1) * XI_FU_MULTIPLE;

  XI_OBJ_DEF* coldef = xi_add_column_def(lstdef, _obj->cid+2000,
                         XI_ATR_VISIBLE|XI_ATR_ENABLED|XI_ATR_READONLY,
                         0, len, 80, "");

  RCT l; xi_get_def_rect(lstdef, &l);
  PNT p; p.h = r.left;
  WINDOW pwin = xi_get_window(_obj->itf);
  RCT w; xvt_vobj_get_client_rect(pwin, &w);
  // place rectangle
  if (r.bottom + l.bottom - l.top <= w.bottom)
    p.v = r.bottom;
  else
  {
    p.v = r.top - l.bottom - l.top;
    if (p.v < w.top) p.v = w.top;
  }
  RCT wr;
  wr.left = p.h; wr.top = p.v;
  xi_get_def_rect(lstdef, &l);
  wr.right  = r.right; // wr.left + (l.right - l.left) -1;
  wr.bottom = wr.top + l.bottom - l.top;
  const int delta_x = _obj->itf->v.itf->delta_x;
  const int delta_y = _obj->itf->v.itf->delta_y;
  wr.left   -= delta_x;
  wr.right  -= delta_x;
  wr.top    -= delta_y;
  wr.bottom -= delta_y;

  WINDOW win = xvt_win_create(W_PLAIN, &wr, "", 0, pwin, WSF_NO_MENUBAR, EM_ALL,
                             (EVENT_HANDLER)xi_event, 0L);
  itfdef->v.itf->win  = win;
  itfdef->v.itf->rctp = &wr;
  XI_OBJ* itfobj = xi_create(NULL, itfdef);
  xi_tree_free(itfdef);

  CHECK(itfobj != NULL, "Oggetto del cazzo!");

  _xi_lst = xi_get_obj(itfobj, _obj->cid+1000);

  CHECK(_xi_lst != NULL, "Lista del cazzo!");

  _open = TRUE;
  xi_cell_request(_xi_lst);
  xvt_scr_set_focus_vobj(win);
  xvt_vobj_raise(win);
  _displayed = TRUE;

/*
  xi_scroll_rec(_xi_lst, _selected, NORMAL_COLOR, XI_ATR_ENABLED, 0);
  const int row = rec2row(_selected);
  XI_OBJ cell;
  XI_MAKE_CELL(&cell, _xi_lst, row, 0);
  xi_set_focus(&cell);
*/
  select(_selected, TRUE);

  xi_dequeue();
}

// ------------------------------------------------------------------

bool TListbox_control::event_handler(XI_OBJ* itf, XI_EVENT* xiev)
{
  bool ok = TRUE;
  switch (xiev->type)
  {
    case XIE_DBL_FIELD:
    case XIE_BUTTON:
      _ddl->open();
      break;
    case XIE_CHAR_FIELD:
      {
        const KEY k = xiev_to_key(xiev);
        if (k >= ' ' && k <= 'z')
          _ddl->select_by_initial(k);
        else if (k == K_F9)
          _ddl->open();
        else if (k == K_RIGHT)   // poor man's substitute for down arrow
          _ddl->select_by_ofs(1);
        else if (k == K_LEFT)   // poor man's substitute for up arrow
          _ddl->select_by_ofs(-1);
        xiev->refused = TRUE;
      }
      break;
    case XIE_CHG_FIELD:
      // Ignore changes: they are notified by the drop-down list
      break;
    default:
      ok =  TField_control::event_handler(itf, xiev);
      break;
  }
  return ok;
}

void TListbox_control::set_values(const char* cod, const char* val)
{
  _ddl->set_values(cod, val);
  if (selected() >= items())
    _ddl->select(0, TRUE);
  else
    _ddl->select(selected(), TRUE);
}

TListbox_control::TListbox_control(WINDOW win, short cid,
                                   short left, short top, short width,
                                   const char* flags, const char* text,
                                   const char* codes, const char* values)
{
   create(win, cid, left, top, width , 1, width, flags, text, TRUE);
   _ddl = new TDropDownList(_obj, codes, values, width);
  _ddl->select(0, TRUE);
}

TListbox_control::~TListbox_control()
{
  delete _ddl;
}