listbox.c

lpc2478+ucosII+ucgui源码

      LISTBOX_SetSel(hObj, Sel);
    } else {
      Notification = WM_NOTIFICATION_RELEASED;
    }
  } else {     /* Mouse moved out */
    Notification = WM_NOTIFICATION_MOVED_OUT;
  }
  WM_NotifyParent(hObj, Notification);
  return 0;                        /* Message handled */
}

/*********************************************************************
*
*       Callback
*/
static void _LISTBOX_Callback (WM_MESSAGE*pMsg) {
  LISTBOX_Handle hObj = pMsg->hWin;
  LISTBOX_Obj* pObj = LISTBOX_H2P(hObj);
  WM_SCROLL_STATE ScrollState;
  /* Let widget handle the standard messages */
  if (WIDGET_HandleActive(hObj, pMsg) == 0) {
    return;
  }
  switch (pMsg->MsgId) {
  case WM_NOTIFY_PARENT:
    switch (pMsg->Data.v) {
    case WM_NOTIFICATION_VALUE_CHANGED:
      WM_GetScrollState(pMsg->hWinSrc, &ScrollState);
      pObj->ScrollState.v = ScrollState.v;
      WM_InvalidateWindow(hObj);
      break;
    case WM_NOTIFICATION_SCROLLBAR_ADDED:
      _SetScrollState(hObj);
      break;
    }
    break;
  case WM_PAINT:
    _Paint(hObj);
    break;
  case WM_TOUCH:
    if (_OnTouch(hObj, pObj, pMsg) == 0)
      return;
    break;
  case WM_DELETE:
    _FreeAttached(pObj);
    break;       /* No return here ... WM_DefaultProc needs to be called */
 case WM_KEY:
    if ( ((WM_KEY_INFO*)(pMsg->Data.p))->PressedCnt >0) {
      int Key = ((WM_KEY_INFO*)(pMsg->Data.p))->Key;
      switch (Key) {
        case GUI_KEY_TAB:
          break;                    /* Send to parent by not doing anything */
        default:
          LISTBOX_AddKey(hObj, Key);
          return;
      }
    }
    break;
  }
  WM_DefaultProc(pMsg);
}

/*********************************************************************
*
*       Exported routines:  Create
*
**********************************************************************
*/

LISTBOX_Handle LISTBOX_CreateAsChild(
  const GUI_ConstString* ppText,
  WM_HWIN hWinParent,
  int x0, int y0, int xsize, int ysize, int Flags)
{
  LISTBOX_Handle hObj = WM_CreateWindowAsChild(x0, y0, xsize, ysize, 
                                               hWinParent, Flags, _LISTBOX_Callback,
                                               sizeof(LISTBOX_Obj)-sizeof(WM_Obj));
  if (hObj) {
    LISTBOX_Obj* pObj   = LISTBOX_H2P(hObj);
    /* init widget specific variables */
    WIDGET__Init(&pObj->Widget, WIDGET_STATE_FOCUSSABLE | WIDGET_STATE_ENABLED);
    /* pObj->ppText = 0; */   /* Zero init not required */
    pObj->pFont  = _pDefaultFont;
    pObj->aBackColor[0] = LISTBOX_BKCOLOR0_DEFAULT;
    pObj->aBackColor[1] = LISTBOX_BKCOLOR1_DEFAULT;
    pObj->aBackColor[2] = LISTBOX_BKCOLOR2_DEFAULT;
    pObj->aTextColor[0] = LISTBOX_TEXTCOLOR0_DEFAULT;
    pObj->aTextColor[1] = LISTBOX_TEXTCOLOR1_DEFAULT;
    pObj->aTextColor[2] = LISTBOX_TEXTCOLOR2_DEFAULT;
    if (hObj && ppText) {
      LISTBOX_Obj* pObj   = LISTBOX_H2P(hObj);
      INIT_ID(pObj);
      /* init member variables */
      /* Check size */
      if (!xsize) {
        const GUI_FONT* pFontOld = GUI_SetFont(pObj->pFont);
        int i;
		    for (i=0; *(ppText+i); i++) {
          int Size = GUI_GetStringDistX(*(ppText+i));
          if (Size>xsize)
			      xsize = Size;
		    }
        GUI_SetFont(pFontOld);
	    }
      /* Set non-zero attributes */
      LISTBOX_SetText(hObj, ppText);
    }
    _CalcScrollParas(hObj);
  }
  return hObj;
}

LISTBOX_Handle LISTBOX_Create(
                    const GUI_ConstString* ppText,
                    int x0, int y0, int xsize, int ysize, int Flags)
{
   return LISTBOX_CreateAsChild(ppText, WM_HWIN_NULL /*hWin*/, x0, y0, xsize, ysize, Flags);
}

LISTBOX_Handle LISTBOX_CreateIndirect(const GUI_WIDGET_CREATE_INFO* pCreateInfo, WM_HWIN hWinParent, int x0, int y0, WM_CALLBACK* cb) {
  LISTBOX_Handle  hThis;
  GUI_USE_PARA(cb);
  hThis = LISTBOX_CreateAsChild(0,
                                hWinParent,
                                pCreateInfo->x0 + x0, 
                                pCreateInfo->y0 + y0, 
                                pCreateInfo->xSize, 
                                pCreateInfo->ySize, 
                                pCreateInfo->Flags);
  if (hThis) {
    LISTBOX_Obj* pObj = LISTBOX_H2P(hThis);
    INIT_ID(pObj);
    pObj->Widget.Id     = pCreateInfo->Id;
    pObj->Widget.State  = LISTBOX_STATE_INACTIVE;
  }
  return hThis;
}

/*********************************************************************
*
*       Exported routines:  Various methods
*
**********************************************************************
*/

void LISTBOX_AddKey(LISTBOX_Handle hObj, int Key) {
  if (hObj) {
    WM_LOCK();
    switch (Key) {
      case GUI_KEY_DOWN:
        LISTBOX_IncSel(hObj);
        break;
      case GUI_KEY_UP:
        LISTBOX_DecSel(hObj);
        break;
      default:
        _SelectByKey(hObj, Key);
        break;
    }
    WM_UNLOCK();
  }
}

void LISTBOX_AddString(LISTBOX_Handle hObj, const char* s) {
  int len;
  WM_HMEM hNewItem, hNewBuffer;
  WM_HMEM *pOldBuffer;
  WM_HMEM *pNewBuffer;
  char* sNewString;
  LISTBOX_Obj* pObj;
  if (hObj && s) {
    WM_LOCK();
    pObj = LISTBOX_H2P(hObj);
    len = strlen(s);
    if ((hNewItem = WM_ALLOC(len +1)) ==0) {
      GUI_DEBUG_ERROROUT("LISTBOX_AddString failed to alloc buffer");
    } else {
      /* Add the new item to the buffer */
      if ((hNewBuffer = WM_ALLOC(sizeof(WM_HMEM) * (pObj->NumItems + 1))) == 0) {
        GUI_DEBUG_ERROROUT("LISTBOX_AddString failed to alloc buffer");
        WM_FREE(hNewItem);
      } else {
        pNewBuffer = WM_HMEM2Ptr(hNewBuffer);
        sNewString = WM_HMEM2Ptr(hNewItem);
        strcpy(sNewString, s);
        /* Copy contents of handle buffer (if any) */
        if (pObj->haHandle) {
          pOldBuffer = WM_HMEM2Ptr(pObj->haHandle);
          memcpy(pNewBuffer, pOldBuffer, pObj->NumItems * sizeof(WM_HMEM));
          WM_FREE(pObj->haHandle);
        }
        *(pNewBuffer + pObj->NumItems) = hNewItem;
        pObj->haHandle = hNewBuffer;
        pObj->NumItems++;
      }
    }
    LISTBOX_Invalidate(hObj);
    WM_UNLOCK();
  }
}

/*********************************************************************
*
*       LISTBOX_GetNumItems
*/
int LISTBOX_GetNumItems(LISTBOX_Handle hObj) {
  int r = 0;
  LISTBOX_Obj* pObj;
  if (hObj) {
    WM_LOCK();
    pObj = LISTBOX_H2P(hObj);
    ASSERT_IS_VALID_PTR(pObj);
    r = pObj->NumItems;
    WM_UNLOCK();
  }
  return r;
}


void LISTBOX_SetText(LISTBOX_Handle hObj, const GUI_ConstString* ppText) {
  int i;
  const char* s;
  if (hObj) {
    WM_LOCK();
    if (ppText) {
      for (i = 0; (s = *(ppText+i)) != 0; i++) {
        LISTBOX_AddString(hObj, s);
      }
    }
    _CalcScrollParas(hObj);
    LISTBOX_Invalidate(hObj);
    WM_UNLOCK();
  }
}

void LISTBOX_SetFont(LISTBOX_Handle hObj, const GUI_FONT* pfont) {
  LISTBOX_Obj* pObj;
  if (hObj) {
    WM_LOCK();
    pObj = LISTBOX_H2P(hObj);
    ASSERT_IS_VALID_PTR(pObj);
    pObj->pFont = pfont;
    _CalcScrollParas(hObj);
    LISTBOX_Invalidate(hObj);
    WM_UNLOCK();
  }
}


void LISTBOX_SetBackColor(LISTBOX_Handle hObj, int index, GUI_COLOR color) {
  LISTBOX_Obj* pObj;
  if (hObj) {
    WM_LOCK();
    pObj = LISTBOX_H2P(hObj);
    ASSERT_IS_VALID_PTR(pObj);
    pObj->aBackColor[index] = color;
    LISTBOX_Invalidate(hObj);
    WM_UNLOCK();
  }
}

void LISTBOX_SetTextColor(LISTBOX_Handle hObj, int index, GUI_COLOR color) {
  LISTBOX_Obj* pObj;
  if (hObj) {
    WM_LOCK();
    pObj = LISTBOX_H2P(hObj);
    ASSERT_IS_VALID_PTR(pObj);
    pObj->aTextColor[index] = color;
    LISTBOX_Invalidate(hObj);
    WM_UNLOCK();
  }
}

void LISTBOX_SetSel (LISTBOX_Handle hObj, int Sel) {
  int NumItems, MaxSel;
  LISTBOX_Obj* pObj;
  if (hObj) {
    WM_LOCK();
    pObj = LISTBOX_H2P(hObj);
    ASSERT_IS_VALID_PTR(pObj);
    NumItems = _GetNumItems(pObj);
    MaxSel = NumItems ? NumItems-1 : 0;
    if (Sel > MaxSel) {
      Sel = MaxSel;
    }
    if (Sel != pObj->Sel) {
      pObj->Sel = Sel;
      LISTBOX_Invalidate(hObj);
      WM_NotifyParent(hObj, WM_NOTIFICATION_SEL_CHANGED);
    }
    _CheckSel(hObj);
    WM_UNLOCK();
  }
}

void LISTBOX_IncSel      (LISTBOX_Handle hObj) {
  int Sel = LISTBOX_GetSel(hObj);
  LISTBOX_SetSel(hObj, Sel+1);
}

void LISTBOX_DecSel      (LISTBOX_Handle hObj) {
  int Sel = LISTBOX_GetSel(hObj);
  if (Sel)
	  Sel--;
  LISTBOX_SetSel(hObj, Sel);
}

int  LISTBOX_GetSel (LISTBOX_Handle hObj) {
  int r = 0;
  LISTBOX_Obj* pObj;
  if (hObj) {
    WM_LOCK();
    pObj = LISTBOX_H2P(hObj);
    ASSERT_IS_VALID_PTR(pObj);
    r = pObj->Sel;
    WM_UNLOCK();
  }
  return r;
}

void LISTBOX_SetDefaultFont(const GUI_FONT* pFont) {
  _pDefaultFont = pFont;
}

const GUI_FONT* LISTBOX_GetDefaultFont(void) {
  return _pDefaultFont;
}

#else                            /* Avoid problems with empty object modules */
  void LISTBOX_C(void) {}
#endif