interface/wx/wrapsizer.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wrapsizer.h
   3 // Purpose:     interface of wxWrapSizer
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxWrapSizer
  11
  12     A wrap sizer lays out its items in a single line, like a box sizer -- as long
  13     as there is space available in that direction.
  14     Once all available space in the primary direction has been used, a new line
  15     is added and items are added there.
  16
  17     So a wrap sizer has a primary orientation for adding items, and adds lines
  18     as needed in the secondary direction.
  19
  20     @library{wxcore}
  21     @category{winlayout}
  22
  23     @see wxBoxSizer, wxSizer, @ref overview_sizer
  24 */
  25 class wxWrapSizer : public wxBoxSizer
  26 {
  27 public:
  28     /**
  29         Constructor for a wxWrapSizer.
  30
  31         @a orient determines the primary direction of the sizer (the most common
  32         case being @c wxHORIZONTAL). The flags parameter can be a combination of
  33         the values @c wxEXTEND_LAST_ON_EACH_LINE which will cause the last item
  34         on each line to use any remaining space on that line and @c wxREMOVE_LEADING_SPACES
  35         which removes any spacer elements from the beginning of a row.
  36
  37         Both of these flags are on by default.
  38     */
  39     wxWrapSizer(int orient = wxHORIZONTAL,
  40                 int flags = wxWRAPSIZER_DEFAULT_FLAGS);
  41
  42     /**
  43         Not used by an application.
  44
  45         This is the mechanism by which sizers can inform sub-items of the first
  46         determined size component.
  47         The sub-item can then better determine its size requirements.
  48
  49         Returns @true if the information was used (and the sub-item min size was
  50         updated).
  51     */
  52     virtual bool InformFirstDirection(int direction, int size,
  53                                       int availableOtherDir);
  54
  55     virtual void RecalcSizes();
  56     virtual wxSize CalcMin();
  57
  58 protected:
  59     /**
  60         Can be overridden in the derived classes to treat some normal items as
  61         spacers.
  62
  63         This method is used to determine whether the given @a item should be
  64         considered to be a spacer for the purposes of @c wxREMOVE_LEADING_SPACES
  65         implementation. By default only returns @true for the real spacers.
  66      */
  67     virtual bool IsSpaceItem(wxSizerItem *item) const;
  68 };
  69