include/wx/msw/private/button.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/private/button.h
   3 // Purpose:     helper functions used with native BUTTON control
   4 // Author:      Vadim Zeitlin
   5 // Created:     2008-06-07
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_MSW_PRIVATE_BUTTON_H_
  12 #define _WX_MSW_PRIVATE_BUTTON_H_
  13
  14 // define some standard button constants which may be missing in the headers
  15 #ifndef BS_PUSHLIKE
  16     #define BS_PUSHLIKE 0x00001000L
  17 #endif
  18
  19 #ifndef BST_UNCHECKED
  20     #define BST_UNCHECKED 0x0000
  21 #endif
  22
  23 #ifndef BST_CHECKED
  24     #define BST_CHECKED 0x0001
  25 #endif
  26
  27 #ifndef BST_INDETERMINATE
  28     #define BST_INDETERMINATE 0x0002
  29 #endif
  30
  31 namespace wxMSWButton
  32 {
  33
  34 // returns BS_MULTILINE if the label contains new lines or 0 otherwise
  35 inline int GetMultilineStyle(const wxString& label)
  36 {
  37     return label.find(wxT('\n')) == wxString::npos ? 0 : BS_MULTILINE;
  38 }
  39
  40 // update the style of the specified HWND to include or exclude BS_MULTILINE
  41 // depending on whether the label contains the new lines
  42 void UpdateMultilineStyle(HWND hwnd, const wxString& label);
  43
  44 // flags for ComputeBestSize() and GetFittingSize()
  45 enum
  46 {
  47     Size_AuthNeeded = 1,
  48     Size_ExactFit   = 2
  49 };
  50
  51 // NB: All the functions below are implemented in src/msw/button.cpp
  52
  53 // Compute the button size (as if wxBU_EXACTFIT were specified, i.e. without
  54 // adjusting it to be of default size if it's smaller) for the given label size
  55 WXDLLIMPEXP_CORE wxSize
  56 GetFittingSize(wxWindow *win, const wxSize& sizeLabel, int flags = 0);
  57
  58 // Compute the button size (as if wxBU_EXACTFIT were specified) by computing
  59 // its label size and then calling GetFittingSize().
  60 wxSize ComputeBestFittingSize(wxControl *btn, int flags = 0);
  61
  62 // Increase the size passed as parameter to be at least the standard button
  63 // size if the control doesn't have wxBU_EXACTFIT style and also cache it as
  64 // the best size and return its value -- this is used in DoGetBestSize()
  65 // implementation.
  66 wxSize IncreaseToStdSizeAndCache(wxControl *btn, const wxSize& size);
  67
  68 // helper of wxToggleButton::DoGetBestSize()
  69 inline wxSize ComputeBestSize(wxControl *btn, int flags = 0)
  70 {
  71     return IncreaseToStdSizeAndCache(btn, ComputeBestFittingSize(btn, flags));
  72 }
  73
  74 } // namespace wxMSWButton
  75
  76 #endif // _WX_MSW_PRIVATE_BUTTON_H_
  77