src/msw/radiobut.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_RADIOBTN
  28
  29 #include "wx/radiobut.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/settings.h"
  33     #include "wx/dcscreen.h"
  34 #endif
  35
  36 #include "wx/msw/private.h"
  37
  38 // ============================================================================
  39 // wxRadioButton implementation
  40 // ============================================================================
  41
  42 // ----------------------------------------------------------------------------
  43 // wxRadioButton creation
  44 // ----------------------------------------------------------------------------
  45
  46
  47 #if wxUSE_EXTENDED_RTTI
  48 WX_DEFINE_FLAGS( wxRadioButtonStyle )
  49
  50 wxBEGIN_FLAGS( wxRadioButtonStyle )
  51     // new style border flags, we put them first to
  52     // use them for streaming out
  53     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  54     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  55     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  56     wxFLAGS_MEMBER(wxBORDER_RAISED)
  57     wxFLAGS_MEMBER(wxBORDER_STATIC)
  58     wxFLAGS_MEMBER(wxBORDER_NONE)
  59
  60     // old style border flags
  61     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  62     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  63     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  64     wxFLAGS_MEMBER(wxRAISED_BORDER)
  65     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  66     wxFLAGS_MEMBER(wxBORDER)
  67
  68     // standard window styles
  69     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  70     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  71     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  72     wxFLAGS_MEMBER(wxWANTS_CHARS)
  73     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  74     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  75     wxFLAGS_MEMBER(wxVSCROLL)
  76     wxFLAGS_MEMBER(wxHSCROLL)
  77
  78     wxFLAGS_MEMBER(wxRB_GROUP)
  79
  80 wxEND_FLAGS( wxRadioButtonStyle )
  81
  82 IMPLEMENT_DYNAMIC_CLASS_XTI(wxRadioButton, wxControl,"wx/radiobut.h")
  83
  84 wxBEGIN_PROPERTIES_TABLE(wxRadioButton)
  85     wxEVENT_PROPERTY( Click , wxEVT_COMMAND_RADIOBUTTON_SELECTED , wxCommandEvent )
  86     wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
  87     wxPROPERTY( Label,wxString, SetLabel, GetLabel, wxString(), 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
  88     wxPROPERTY( Value ,bool, SetValue, GetValue, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
  89     wxPROPERTY_FLAGS( WindowStyle , wxRadioButtonStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
  90 wxEND_PROPERTIES_TABLE()
  91
  92 wxBEGIN_HANDLERS_TABLE(wxRadioButton)
  93 wxEND_HANDLERS_TABLE()
  94
  95 wxCONSTRUCTOR_6( wxRadioButton , wxWindow* , Parent , wxWindowID , Id , wxString , Label , wxPoint , Position , wxSize , Size , long , WindowStyle )
  96
  97 #else
  98 IMPLEMENT_DYNAMIC_CLASS(wxRadioButton, wxControl)
  99 #endif
 100
 101
 102 void wxRadioButton::Init()
 103 {
 104     m_isChecked = false;
 105 }
 106
 107 bool wxRadioButton::Create(wxWindow *parent,
 108                            wxWindowID id,
 109                            const wxString& label,
 110                            const wxPoint& pos,
 111                            const wxSize& size,
 112                            long style,
 113                            const wxValidator& validator,
 114                            const wxString& name)
 115 {
 116     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 117         return false;
 118
 119     long msStyle = WS_TABSTOP;
 120     if ( HasFlag(wxRB_GROUP) )
 121         msStyle |= WS_GROUP;
 122
 123     /*
 124        wxRB_SINGLE is a temporary workaround for the following problem: if you
 125        have 2 radiobuttons in the same group but which are not consecutive in
 126        the dialog, Windows can enter an infinite loop! The simplest way to
 127        reproduce it is to create radio button, then a panel and then another
 128        radio button: then checking the last button hangs the app.
 129
 130        Ideally, we'd detect (and avoid) such situation automatically but for
 131        now, as I don't know how to do it, just allow the user to create
 132        BS_RADIOBUTTON buttons for such situations.
 133      */
 134     msStyle |= HasFlag(wxRB_SINGLE) ? BS_RADIOBUTTON : BS_AUTORADIOBUTTON;
 135
 136     if ( HasFlag(wxCLIP_SIBLINGS) )
 137         msStyle |= WS_CLIPSIBLINGS;
 138     if ( HasFlag(wxALIGN_RIGHT) )
 139         msStyle |= BS_LEFTTEXT | BS_RIGHT;
 140
 141     if ( !MSWCreateControl(_T("BUTTON"), msStyle, pos, size, label, 0) )
 142         return false;
 143
 144     // for compatibility with wxGTK, the first radio button in a group is
 145     // always checked (this makes sense anyhow as you need to ensure that at
 146     // least one button in the group is checked and this is the simlpest way to
 147     // do it)
 148     if ( HasFlag(wxRB_GROUP) )
 149         SetValue(true);
 150
 151     return true;
 152 }
 153
 154 // ----------------------------------------------------------------------------
 155 // wxRadioButton functions
 156 // ----------------------------------------------------------------------------
 157
 158 void wxRadioButton::SetValue(bool value)
 159 {
 160     (void)::SendMessage(GetHwnd(), BM_SETCHECK, (value?BST_CHECKED:BST_UNCHECKED), 0L);
 161
 162     m_isChecked = value;
 163
 164     // if we set the value of one radio button we also must clear all the other
 165     // buttons in the same group: Windows doesn't do it automatically
 166     if ( m_isChecked )
 167     {
 168         // If another radiobutton in the group currently has the focus, we have to
 169         // set it to this radiobutton, else the old readiobutton will be reselected
 170         // automatically, if a parent window loses the focus and regains it.
 171         bool shouldSetFocus = false;
 172         wxWindow* pFocusWnd = FindFocus();
 173
 174         const wxWindowList& siblings = GetParent()->GetChildren();
 175         wxWindowList::compatibility_iterator nodeThis = siblings.Find(this);
 176         wxCHECK_RET( nodeThis, _T("radio button not a child of its parent?") );
 177
 178         // if it's not the first item of the group ...
 179         if ( !HasFlag(wxRB_GROUP) )
 180         {
 181             // ... turn off all radio buttons before it
 182             for ( wxWindowList::compatibility_iterator nodeBefore = nodeThis->GetPrevious();
 183                   nodeBefore;
 184                   nodeBefore = nodeBefore->GetPrevious() )
 185             {
 186                 wxRadioButton *btn = wxDynamicCast(nodeBefore->GetData(),
 187                                                    wxRadioButton);
 188                 if ( btn && btn->HasFlag(wxRB_SINGLE) )
 189                 {
 190                     // A wxRB_SINGLE button isn't part of this group
 191                     break;
 192                 }
 193
 194                 if (btn)
 195                 {
 196                     if (btn == pFocusWnd)
 197                         shouldSetFocus = true;
 198
 199                     btn->SetValue(false);
 200
 201                     if ( btn->HasFlag(wxRB_GROUP) )
 202                     {
 203                         // even if there are other radio buttons before this one,
 204                         // they're not in the same group with us
 205                         break;
 206                     }
 207                 }
 208             }
 209         }
 210
 211         // ... and also turn off all buttons after this one
 212         for ( wxWindowList::compatibility_iterator nodeAfter = nodeThis->GetNext();
 213               nodeAfter;
 214               nodeAfter = nodeAfter->GetNext() )
 215         {
 216             wxRadioButton *btn = wxDynamicCast(nodeAfter->GetData(),
 217                                                wxRadioButton);
 218
 219             if ( btn && (btn->HasFlag(wxRB_GROUP) || btn->HasFlag(wxRB_SINGLE) ) )
 220             {
 221                 // no more buttons or the first button of the next group
 222                 break;
 223             }
 224
 225             if (btn)
 226             {
 227                 if (btn == pFocusWnd)
 228                         shouldSetFocus = true;
 229
 230                 btn->SetValue(false);
 231             }
 232         }
 233         if (shouldSetFocus)
 234             SetFocus();
 235     }
 236 }
 237
 238 bool wxRadioButton::GetValue() const
 239 {
 240     wxASSERT_MSG( m_isChecked ==
 241                     (::SendMessage(GetHwnd(), BM_GETCHECK, 0, 0L) != 0),
 242                   _T("wxRadioButton::m_isChecked is out of sync?") );
 243
 244     return m_isChecked;
 245 }
 246
 247 // ----------------------------------------------------------------------------
 248 // wxRadioButton event processing
 249 // ----------------------------------------------------------------------------
 250
 251 void wxRadioButton::Command (wxCommandEvent& event)
 252 {
 253     SetValue(event.GetInt() != 0);
 254     ProcessCommand(event);
 255 }
 256
 257 bool wxRadioButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 258 {
 259     if ( param != BN_CLICKED )
 260         return false;
 261
 262     if ( !m_isChecked )
 263     {
 264         // we have to do this for BS_RADIOBUTTON anyhow and, strangely enough,
 265         // sometimes this is needed even for BS_AUTORADIOBUTTON (when we
 266         // receive focus the button gets BN_CLICKED but stays unchecked!)
 267         SetValue(true);
 268
 269         wxCommandEvent event(wxEVT_COMMAND_RADIOBUTTON_SELECTED, GetId());
 270         event.SetEventObject( this );
 271         event.SetInt(true); // always checked
 272
 273         ProcessCommand(event);
 274     }
 275
 276     return true;
 277 }
 278
 279 // ----------------------------------------------------------------------------
 280 // wxRadioButton geometry
 281 // ----------------------------------------------------------------------------
 282
 283 wxSize wxRadioButton::DoGetBestSize() const
 284 {
 285     static int s_radioSize = 0;
 286
 287     if ( !s_radioSize )
 288     {
 289         wxScreenDC dc;
 290         dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 291
 292         s_radioSize = dc.GetCharHeight();
 293     }
 294
 295     wxString str = GetLabel();
 296
 297     int wRadio, hRadio;
 298     if ( !str.empty() )
 299     {
 300         GetTextExtent(wxStripMenuCodes(str), &wRadio, &hRadio);
 301         wRadio += s_radioSize + GetCharWidth();
 302
 303         if ( hRadio < s_radioSize )
 304             hRadio = s_radioSize;
 305     }
 306     else
 307     {
 308         wRadio = s_radioSize;
 309         hRadio = s_radioSize;
 310     }
 311
 312     wxSize best(wRadio, hRadio);
 313     CacheBestSize(best);
 314     return best;
 315 }
 316
 317 #endif // wxUSE_RADIOBTN