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