src/msw/tglbtn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/tglbtn.cpp
   3 // Purpose:     Definition of the wxToggleButton class, which implements a
   4 //              toggle button under wxMSW.
   5 // Author:      John Norris, minor changes by Axel Schlueter
   6 // Modified by:
   7 // Created:     08.02.01
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 2000 Johnny C. Norris II
  10 // License:     Rocketeer license
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ============================================================================
  14 // declatations
  15 // ============================================================================
  16
  17 // ----------------------------------------------------------------------------
  18 // headers
  19 // ----------------------------------------------------------------------------
  20
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/tglbtn.h"
  28
  29 #if wxUSE_TOGGLEBTN
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/button.h"
  33     #include "wx/brush.h"
  34     #include "wx/dcscreen.h"
  35     #include "wx/settings.h"
  36
  37     #include "wx/log.h"
  38 #endif // WX_PRECOMP
  39
  40 #include "wx/msw/private.h"
  41
  42 // ----------------------------------------------------------------------------
  43 // macros
  44 // ----------------------------------------------------------------------------
  45
  46 IMPLEMENT_DYNAMIC_CLASS(wxToggleButton, wxControl)
  47 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TOGGLEBUTTON_CLICKED)
  48
  49 #define BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cy) (11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)/10)
  50
  51 // ============================================================================
  52 // implementation
  53 // ============================================================================
  54
  55 // ----------------------------------------------------------------------------
  56 // wxToggleButton
  57 // ----------------------------------------------------------------------------
  58
  59 bool wxToggleButton::MSWCommand(WXUINT WXUNUSED(param), WXWORD WXUNUSED(id))
  60 {
  61    wxCommandEvent event(wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, m_windowId);
  62    event.SetInt(GetValue());
  63    event.SetEventObject(this);
  64    ProcessCommand(event);
  65    return TRUE;
  66 }
  67
  68 // Single check box item
  69 bool wxToggleButton::Create(wxWindow *parent, wxWindowID id,
  70                             const wxString& label,
  71                             const wxPoint& pos,
  72                             const wxSize& size, long style,
  73                             const wxValidator& validator,
  74                             const wxString& name)
  75 {
  76    if (!CreateBase(parent, id, pos, size, style, validator, name))
  77       return FALSE;
  78
  79    parent->AddChild(this);
  80
  81    m_backgroundColour = parent->GetBackgroundColour();
  82    m_foregroundColour = parent->GetForegroundColour();
  83
  84 #ifndef BS_PUSHLIKE
  85 #define BS_PUSHLIKE 0x00001000L
  86 #endif
  87
  88    WXDWORD exStyle = 0;
  89    long msStyle = MSWGetStyle(style, & exStyle) ;
  90
  91    msStyle |= BS_AUTOCHECKBOX | BS_PUSHLIKE | WS_TABSTOP ;
  92
  93 #ifdef __WIN32__
  94    if(m_windowStyle & wxBU_LEFT)
  95       msStyle |= BS_LEFT;
  96    if(m_windowStyle & wxBU_RIGHT)
  97       msStyle |= BS_RIGHT;
  98    if(m_windowStyle & wxBU_TOP)
  99       msStyle |= BS_TOP;
 100    if(m_windowStyle & wxBU_BOTTOM)
 101       msStyle |= BS_BOTTOM;
 102 #endif
 103
 104    m_hWnd = (WXHWND)CreateWindowEx(exStyle,
 105                                    wxT("BUTTON"), label,
 106                                    msStyle, 0, 0, 0, 0,
 107                                    (HWND)parent->GetHWND(),
 108                                    (HMENU)m_windowId,
 109                                    wxGetInstance(), NULL);
 110
 111    if ( m_hWnd == 0 )
 112    {
 113         wxLogError(_T("Failed to create a toggle button"));
 114
 115         return FALSE;
 116     }
 117
 118     // Subclass again for purposes of dialog editing mode
 119     SubclassWin(m_hWnd);
 120
 121     SetFont(parent->GetFont());
 122
 123     SetSize(pos.x, pos.y, size.x, size.y);
 124
 125     return TRUE;
 126 }
 127
 128 void wxToggleButton::SetLabel(const wxString& label)
 129 {
 130     SetWindowText(GetHwnd(), label);
 131 }
 132
 133 wxSize wxToggleButton::DoGetBestSize() const
 134 {
 135    wxString label = wxGetWindowText(GetHWND());
 136    int wBtn;
 137    GetTextExtent(label, &wBtn, NULL);
 138
 139    int wChar, hChar;
 140    wxGetCharSize(GetHWND(), &wChar, &hChar, &GetFont());
 141
 142    // add a margin - the button is wider than just its label
 143    wBtn += 3*wChar;
 144
 145    // the button height is proportional to the height of the font used
 146    int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar);
 147
 148    wxSize sz = wxButton::GetDefaultSize();
 149    if (wBtn > sz.x)
 150        sz.x = wBtn;
 151    if (hBtn > sz.y)
 152        sz.y = hBtn;
 153
 154    return sz;
 155 }
 156
 157 void wxToggleButton::SetValue(bool val)
 158 {
 159    SendMessage(GetHwnd(), BM_SETCHECK, val, 0);
 160 }
 161
 162 #ifndef BST_CHECKED
 163 #define BST_CHECKED 0x0001
 164 #endif
 165
 166 bool wxToggleButton::GetValue() const
 167 {
 168 #ifdef __WIN32__
 169    return (SendMessage(GetHwnd(), BM_GETCHECK, 0, 0) == BST_CHECKED);
 170 #else
 171    return ((0x001 & SendMessage(GetHwnd(), BM_GETCHECK, 0, 0)) == 0x001);
 172 #endif
 173 }
 174
 175 void wxToggleButton::Command(wxCommandEvent & event)
 176 {
 177    SetValue((event.GetInt() != 0));
 178    ProcessCommand(event);
 179 }
 180
 181 #endif // wxUSE_TOGGLEBTN
 182