L_ILM_GETVIEWSIZE

Send this message to get the ImageList Control's view size.

Returns

Comments

This message returns the size of the ImageList control's viewing area in rows or columns. The size includes partially visible rows/columns.

The value returned depends on the current scroll style . If the scroll style is SCROLLSTYLE_VERTICAL, then the value returned indicates rows. If the scroll style is SCROLLSTYLE_HORIZONTAL, then the value returned indicates columns.

The associated macro is

L_ImgListGetViewSize(hWnd)

For a complete list of available macros, refer to the Ltlst.h file.

See Also

Example

L_INT ILM_GETVIEWSIZEExample(HWND hCtrl)
{
   if(IsWindow(hCtrl))
   {
      L_INT32 nSize;
      L_INT32 nFirst;
      L_INT32 nLast;
      L_INT32 nCols;
      L_INT32 nCount;

      //NOTE: assume scroll style = SCROLLSTYLE_VERTICAL
      //get the view size
      nSize = (L_INT32)SendMessage(hCtrl, L_ILM_GETVIEWSIZE, 0, 0);
      //get the first visible item
      nFirst = (L_INT32)SendMessage(hCtrl, L_ILM_GETFIRSTVISIBLE, 0, 0);
      //get the column count
      nCols = (L_INT32)SendMessage(hCtrl, L_ILM_GETCOLCOUNT, 0, 0);
      //calculate the index of last visible item
      nLast = nFirst + (nSize*nCols) - 1;//0 based index
      nCount = (L_INT32)SendMessage(hCtrl, L_ILM_GETITEMCOUNT, 0, 0);
      if(nLast > nCount-1)
         nLast = nCount-1;

      return SUCCESS;
   }
   else
      return ERROR_INVALID_PARAMETER;
}