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
GetMultilineStyle(const wxString & label)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
77