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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: radiobut.cpp
3 // Purpose: wxRadioButton
4 // Author: David Webster
5 // Modified by:
6 // Created: 10/12/99
7 // RCS-ID: $Id$
8 // Copyright: (c) David Webster
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // For compilers that support precompilation, includes "wx.h".
13 #include "wx/wxprec.h"
14
15 #ifdef __BORLANDC__
16 #pragma hdrstop
17 #endif
18
19 #ifndef WX_PRECOMP
20 #include <stdio.h>
21 #include "wx/setup.h"
22 #include "wx/radiobut.h"
23 #include "wx/brush.h"
24 #include "wx/dcscreen.h"
25 #include "wx/settings.h"
26 #endif
27
28 #include "wx/os2/private.h"
29
30 IMPLEMENT_DYNAMIC_CLASS(wxRadioButton, wxControl)
31
32 extern void wxAssociateWinWithHandle( HWND hWnd
33 ,wxWindowOS2* pWin
34 );
35
36 void wxRadioButton::Init()
37 {
38 m_bFocusJustSet = FALSE;
39 } // end of wxRadioButton::Init
40
41 void wxRadioButton::Command (
42 wxCommandEvent& rEvent
43 )
44 {
45 SetValue ((rEvent.GetInt() != 0) );
46 ProcessCommand (rEvent);
47 } // end of wxRadioButton::Command
48
49 bool wxRadioButton::Create(
50 wxWindow* pParent
51 , wxWindowID vId
52 , const wxString& rsLabel
53 , const wxPoint& rPos
54 , const wxSize& rSize
55 , long lStyle
56 , const wxValidator& rValidator
57 , const wxString& rsName
58 )
59 {
60 if ( !CreateControl( pParent
61 ,vId
62 ,rPos
63 ,rSize
64 ,lStyle
65 ,rValidator
66 ,rsName))
67 return FALSE;
68
69 long lSstyle = WS_TABSTOP;
70
71 if (HasFlag(wxRB_GROUP))
72 lSstyle |= WS_GROUP;
73
74 //
75 // wxRB_SINGLE is a temporary workaround for the following problem: if you
76 // have 2 radiobuttons in the same group but which are not consecutive in
77 // the dialog, Windows can enter an infinite loop! The simplest way to
78 // reproduce it is to create radio button, then a panel and then another
79 // radio button: then checking the last button hangs the app.
80 //
81 // Ideally, we'd detect (and avoid) such situation automatically but for
82 // now, as I don't know how to do it, just allow the user to create
83 // BS_RADIOBUTTON buttons for such situations.
84 //
85 lSstyle |= HasFlag(wxRB_SINGLE) ? BS_RADIOBUTTON : BS_AUTORADIOBUTTON;
86
87 if (HasFlag(wxCLIP_SIBLINGS))
88 lSstyle |= WS_CLIPSIBLINGS;
89
90 if (!OS2CreateControl( _T("BUTTON")
91 ,lSstyle
92 ,rPos
93 ,rSize
94 ,rsLabel
95 ,0
96 ))
97 return FALSE;
98
99 wxAssociateWinWithHandle(m_hWnd, this);
100 if (HasFlag(wxRB_GROUP))
101 SetValue(TRUE);
102
103 SetFont(*wxSMALL_FONT);
104 SetSize( rPos.x
105 ,rPos.y
106 ,rSize.x
107 ,rSize.y
108 );
109 return TRUE;
110 } // end of wxRadioButton::Create
111
112 wxSize wxRadioButton::DoGetBestSize() const
113 {
114 static int snRadioSize = 0;
115
116 if (!snRadioSize)
117 {
118 wxScreenDC vDC;
119
120 vDC.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
121 snRadioSize = vDC.GetCharHeight();
122 }
123
124 wxString sStr = GetLabel();
125 int nRadioWidth;
126 int nRadioHeight;
127
128 if (!sStr.empty())
129 {
130 GetTextExtent( sStr
131 ,&nRadioWidth
132 ,&nRadioHeight
133 );
134 nRadioWidth += snRadioSize + GetCharWidth();
135 if (nRadioHeight < snRadioSize)
136 nRadioHeight = snRadioSize;
137 }
138 else
139 {
140 nRadioWidth = snRadioSize;
141 nRadioHeight = snRadioSize;
142 }
143 return wxSize( nRadioWidth
144 ,nRadioHeight
145 );
146 } // end of wxRadioButton::DoGetBestSize
147
148 //
149 // Get single selection, for single choice list items
150 //
151 bool wxRadioButton::GetValue() const
152 {
153 return((::WinSendMsg((HWND) GetHWND(), BM_QUERYCHECK, (MPARAM)0L, (MPARAM)0L) != 0));
154 } // end of wxRadioButton::GetValue
155
156 bool wxRadioButton::OS2Command(
157 WXUINT wParam
158 , WXWORD wId
159 )
160 {
161 if (wParam != BN_CLICKED)
162 return FALSE;
163
164 if (m_bFocusJustSet)
165 {
166 //
167 // See above: we want to ignore this event
168 //
169 m_bFocusJustSet = FALSE;
170 }
171 else
172 {
173 bool bIsChecked = GetValue();
174
175 if (HasFlag(wxRB_SINGLE))
176 {
177 //
178 // When we use a "manual" radio button, we have to check the button
179 // ourselves -- but it's reset to unchecked state by the user code
180 // (presumably when another button is pressed)
181 //
182 if (!bIsChecked )
183 SetValue(TRUE);
184 }
185 wxCommandEvent rEvent( wxEVT_COMMAND_RADIOBUTTON_SELECTED
186 ,m_windowId
187 );
188
189 rEvent.SetEventObject(this);
190 ProcessCommand(rEvent);
191 }
192 return TRUE;
193 } // end of wxRadioButton::OS2Command
194
195 void wxRadioButton::SetFocus()
196 {
197 // when the radio button receives a WM_SETFOCUS message it generates a
198 // BN_CLICKED which is totally unexpected and leads to catastrophic results
199 // if you pop up a dialog from the radio button event handler as, when the
200 // dialog is dismissed, the focus is returned to the radio button which
201 // generates BN_CLICKED which leads to showing another dialog and so on
202 // without end!
203 //
204 // to aviod this, we drop the pseudo BN_CLICKED events generated when the
205 // button gains focus
206 m_bFocusJustSet = TRUE;
207
208 wxControl::SetFocus();
209 }
210
211 void wxRadioButton::SetLabel(
212 const wxString& rsLabel
213 )
214 {
215 ::WinSetWindowText((HWND)GetHWND(), (const char *)rsLabel.c_str());
216 } // end of wxRadioButton::SetLabel
217
218 void wxRadioButton::SetValue(
219 bool bValue
220 )
221 {
222 ::WinSendMsg((HWND)GetHWND(), BM_SETCHECK, (MPARAM)bValue, (MPARAM)0);
223 if (bValue)
224 {
225 const wxWindowList& rSiblings = GetParent()->GetChildren();
226 wxWindowList::compatibility_iterator nodeThis = rSiblings.Find(this);
227
228 wxCHECK_RET(nodeThis, _T("radio button not a child of its parent?"));
229
230 //
231 // If it's not the first item of the group ...
232 //
233 if ( !HasFlag(wxRB_GROUP) )
234 {
235 //
236 // ...turn off all radio buttons before this one
237 //
238 for ( wxWindowList::compatibility_iterator nodeBefore = nodeThis->GetPrevious();
239 nodeBefore;
240 nodeBefore = nodeBefore->GetPrevious() )
241 {
242 wxRadioButton* pBtn = wxDynamicCast( nodeBefore->GetData()
243 ,wxRadioButton
244 );
245 if (!pBtn)
246 {
247 //
248 // The radio buttons in a group must be consecutive, so there
249 // are no more of them
250 //
251 break;
252 }
253 pBtn->SetValue(FALSE);
254 if (pBtn->HasFlag(wxRB_GROUP))
255 {
256 //
257 // Even if there are other radio buttons before this one,
258 // they're not in the same group with us
259 //
260 break;
261 }
262 }
263 }
264
265 //
266 // ... and all after this one
267 //
268 for (wxWindowList::compatibility_iterator nodeAfter = nodeThis->GetNext();
269 nodeAfter;
270 nodeAfter = nodeAfter->GetNext())
271 {
272 wxRadioButton* pBtn = wxDynamicCast( nodeAfter->GetData()
273 ,wxRadioButton
274 );
275
276 if (!pBtn || pBtn->HasFlag(wxRB_GROUP) )
277 {
278 //
279 // No more buttons or the first button of the next group
280 //
281 break;
282 }
283 pBtn->SetValue(FALSE);
284 }
285 }
286 } // end of wxRadioButton::SetValue
287
288 MRESULT wxRadioButton::OS2WindowProc(
289 WXUINT uMsg
290 , WXWPARAM wParam
291 , WXLPARAM lParam
292 )
293 {
294 if (uMsg == WM_SETFOCUS)
295 {
296 m_bFocusJustSet = TRUE;
297
298 MRESULT mRc = wxControl::OS2WindowProc( uMsg
299 ,wParam
300 ,lParam
301 );
302
303 m_bFocusJustSet = FALSE;
304 return mRc;
305 }
306 return wxControl::OS2WindowProc( uMsg
307 ,wParam
308 ,lParam
309 );
310 } // end of wxRadioButton::OS2WindowProc