src/msw/radiobut.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/radiobut.cpp
   3 // Purpose:     wxRadioButton
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "radiobut.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_RADIOBTN
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/radiobut.h"
  35     #include "wx/settings.h"
  36     #include "wx/dcscreen.h"
  37 #endif
  38
  39 #include "wx/msw/private.h"
  40
  41 // ============================================================================
  42 // wxRadioButton implementation
  43 // ============================================================================
  44
  45 // ----------------------------------------------------------------------------
  46 // wxRadioButton creation
  47 // ----------------------------------------------------------------------------
  48
  49
  50 #if wxUSE_EXTENDED_RTTI
  51 WX_DEFINE_FLAGS( wxRadioButtonStyle )
  52
  53 wxBEGIN_FLAGS( wxRadioButtonStyle )
  54     // new style border flags, we put them first to
  55     // use them for streaming out
  56     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  57     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  58     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  59     wxFLAGS_MEMBER(wxBORDER_RAISED)
  60     wxFLAGS_MEMBER(wxBORDER_STATIC)
  61     wxFLAGS_MEMBER(wxBORDER_NONE)
  62
  63     // old style border flags
  64     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  65     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  66     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  67     wxFLAGS_MEMBER(wxRAISED_BORDER)
  68     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  69     wxFLAGS_MEMBER(wxBORDER)
  70
  71     // standard window styles
  72     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  73     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  74     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  75     wxFLAGS_MEMBER(wxWANTS_CHARS)
  76     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  77     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  78     wxFLAGS_MEMBER(wxVSCROLL)
  79     wxFLAGS_MEMBER(wxHSCROLL)
  80
  81     wxFLAGS_MEMBER(wxRB_GROUP)
  82
  83 wxEND_FLAGS( wxRadioButtonStyle )
  84
  85 IMPLEMENT_DYNAMIC_CLASS_XTI(wxRadioButton, wxControl,"wx/radiobut.h")
  86
  87 wxBEGIN_PROPERTIES_TABLE(wxRadioButton)
  88     wxEVENT_PROPERTY( Click , wxEVT_COMMAND_RADIOBUTTON_SELECTED , wxCommandEvent )
  89     wxPROPERTY( Font , wxFont , SetFont , GetFont  , , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
  90     wxPROPERTY( Label,wxString, SetLabel, GetLabel, wxString(), 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
  91     wxPROPERTY( Value ,bool, SetValue, GetValue,, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
  92     wxPROPERTY_FLAGS( WindowStyle , wxRadioButtonStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
  93 wxEND_PROPERTIES_TABLE()
  94
  95 wxBEGIN_HANDLERS_TABLE(wxRadioButton)
  96 wxEND_HANDLERS_TABLE()
  97
  98 wxCONSTRUCTOR_6( wxRadioButton , wxWindow* , Parent , wxWindowID , Id , wxString , Label , wxPoint , Position , wxSize , Size , long , WindowStyle )
  99
 100 #else
 101 IMPLEMENT_DYNAMIC_CLASS(wxRadioButton, wxControl)
 102 #endif
 103
 104
 105 void wxRadioButton::Init()
 106 {
 107     m_isChecked = false;
 108 }
 109
 110 bool wxRadioButton::Create(wxWindow *parent,
 111                            wxWindowID id,
 112                            const wxString& label,
 113                            const wxPoint& pos,
 114                            const wxSize& size,
 115                            long style,
 116                            const wxValidator& validator,
 117                            const wxString& name)
 118 {
 119     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 120         return false;
 121
 122     long msStyle = WS_TABSTOP;
 123     if ( HasFlag(wxRB_GROUP) )
 124         msStyle |= WS_GROUP;
 125
 126     /*
 127        wxRB_SINGLE is a temporary workaround for the following problem: if you
 128        have 2 radiobuttons in the same group but which are not consecutive in
 129        the dialog, Windows can enter an infinite loop! The simplest way to
 130        reproduce it is to create radio button, then a panel and then another
 131        radio button: then checking the last button hangs the app.
 132
 133        Ideally, we'd detect (and avoid) such situation automatically but for
 134        now, as I don't know how to do it, just allow the user to create
 135        BS_RADIOBUTTON buttons for such situations.
 136      */
 137     msStyle |= HasFlag(wxRB_SINGLE) ? BS_RADIOBUTTON : BS_AUTORADIOBUTTON;
 138
 139     if ( HasFlag(wxCLIP_SIBLINGS) )
 140         msStyle |= WS_CLIPSIBLINGS;
 141
 142     if ( !MSWCreateControl(_T("BUTTON"), msStyle, pos, size, label, 0) )
 143         return false;
 144
 145     // for compatibility with wxGTK, the first radio button in a group is
 146     // always checked (this makes sense anyhow as you need to ensure that at
 147     // least one button in the group is checked and this is the simlpest way to
 148     // do it)
 149     if ( HasFlag(wxRB_GROUP) )
 150         SetValue(true);
 151
 152     return true;
 153 }
 154
 155 // ----------------------------------------------------------------------------
 156 // wxRadioButton functions
 157 // ----------------------------------------------------------------------------
 158
 159 void wxRadioButton::SetValue(bool value)
 160 {
 161     (void)::SendMessage(GetHwnd(), BM_SETCHECK, (value?BST_CHECKED:BST_UNCHECKED), 0L);
 162
 163     m_isChecked = value;
 164
 165     // if we set the value of one radio button we also must clear all the other
 166     // buttons in the same group: Windows doesn't do it automatically
 167     if ( m_isChecked )
 168     {
 169         const wxWindowList& siblings = GetParent()->GetChildren();
 170         wxWindowList::compatibility_iterator nodeThis = siblings.Find(this);
 171         wxCHECK_RET( nodeThis, _T("radio button not a child of its parent?") );
 172
 173         // if it's not the first item of the group ...
 174         if ( !HasFlag(wxRB_GROUP) )
 175         {
 176             // ... turn off all radio buttons before it
 177             for ( wxWindowList::compatibility_iterator nodeBefore = nodeThis->GetPrevious();
 178                   nodeBefore;
 179                   nodeBefore = nodeBefore->GetPrevious() )
 180             {
 181                 wxRadioButton *btn = wxDynamicCast(nodeBefore->GetData(),
 182                                                    wxRadioButton);
 183                 if ( !btn )
 184                 {
 185                     // the radio buttons in a group must be consecutive, so
 186                     // there are no more of them
 187                     break;
 188                 }
 189
 190                 btn->SetValue(false);
 191
 192                 if ( btn->HasFlag(wxRB_GROUP) )
 193                 {
 194                     // even if there are other radio buttons before this one,
 195                     // they're not in the same group with us
 196                     break;
 197                 }
 198             }
 199         }
 200
 201         // ... and also turn off all buttons after this one
 202         for ( wxWindowList::compatibility_iterator nodeAfter = nodeThis->GetNext();
 203               nodeAfter;
 204               nodeAfter = nodeAfter->GetNext() )
 205         {
 206             wxRadioButton *btn = wxDynamicCast(nodeAfter->GetData(),
 207                                                wxRadioButton);
 208
 209             if ( !btn || btn->HasFlag(wxRB_GROUP) )
 210             {
 211                 // no more buttons or the first button of the next group
 212                 break;
 213             }
 214
 215             btn->SetValue(false);
 216         }
 217     }
 218 }
 219
 220 bool wxRadioButton::GetValue() const
 221 {
 222     wxASSERT_MSG( m_isChecked ==
 223                     (::SendMessage(GetHwnd(), BM_GETCHECK, 0, 0L) != 0),
 224                   _T("wxRadioButton::m_isChecked is out of sync?") );
 225
 226     return m_isChecked;
 227 }
 228
 229 // ----------------------------------------------------------------------------
 230 // wxRadioButton event processing
 231 // ----------------------------------------------------------------------------
 232
 233 void wxRadioButton::Command (wxCommandEvent& event)
 234 {
 235     SetValue(event.m_commandInt != 0);
 236     ProcessCommand(event);
 237 }
 238
 239 bool wxRadioButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 240 {
 241     if ( param != BN_CLICKED )
 242         return false;
 243
 244     if ( !m_isChecked )
 245     {
 246         // we have to do this for BS_RADIOBUTTON anyhow and, strangely enough,
 247         // sometimes this is needed even for BS_AUTORADIOBUTTON (when we
 248         // receive focus the button gets BN_CLICKED but stays unchecked!)
 249         SetValue(true);
 250
 251         wxCommandEvent event(wxEVT_COMMAND_RADIOBUTTON_SELECTED, GetId());
 252         event.SetEventObject( this );
 253         event.SetInt(true); // always checked
 254
 255         ProcessCommand(event);
 256     }
 257
 258     return true;
 259 }
 260
 261 // ----------------------------------------------------------------------------
 262 // wxRadioButton geometry
 263 // ----------------------------------------------------------------------------
 264
 265 wxSize wxRadioButton::DoGetBestSize() const
 266 {
 267     static int s_radioSize = 0;
 268
 269     if ( !s_radioSize )
 270     {
 271         wxScreenDC dc;
 272         dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 273
 274         s_radioSize = dc.GetCharHeight();
 275     }
 276
 277     wxString str = GetLabel();
 278
 279     int wRadio, hRadio;
 280     if ( !str.empty() )
 281     {
 282         GetTextExtent(str, &wRadio, &hRadio);
 283         wRadio += s_radioSize + GetCharWidth();
 284
 285         if ( hRadio < s_radioSize )
 286             hRadio = s_radioSize;
 287     }
 288     else
 289     {
 290         wRadio = s_radioSize;
 291         hRadio = s_radioSize;
 292     }
 293
 294     return wxSize(wRadio, hRadio);
 295 }
 296
 297 #endif // wxUSE_RADIOBTN
 298