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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/os2/dialog.cpp
3 // Purpose: wxDialog class
4 // Author: David Webster
5 // Modified by:
6 // Created: 10/14/99
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 #include "wx/dialog.h"
16
17 #ifndef WX_PRECOMP
18 #include "wx/utils.h"
19 #include "wx/frame.h"
20 #include "wx/app.h"
21 #include "wx/settings.h"
22 #include "wx/intl.h"
23 #include "wx/log.h"
24 #endif
25
26 #include "wx/os2/private.h"
27 #include "wx/evtloop.h"
28 #include "wx/ptr_scpd.h"
29
30 #define wxDIALOG_DEFAULT_X 300
31 #define wxDIALOG_DEFAULT_Y 300
32
33 #define wxDIALOG_DEFAULT_WIDTH 500
34 #define wxDIALOG_DEFAULT_HEIGHT 500
35
36 IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxTopLevelWindow)
37
38 // ----------------------------------------------------------------------------
39 // wxDialogModalData
40 // ----------------------------------------------------------------------------
41
42 // this is simply a container for any data we need to implement modality which
43 // allows us to avoid changing wxDialog each time the implementation changes
44 class wxDialogModalData
45 {
46 public:
47 wxDialogModalData(wxDialog *dialog) : m_evtLoop(dialog) { }
48
49 void RunLoop()
50 {
51 m_evtLoop.Run();
52 }
53
54 void ExitLoop()
55 {
56 m_evtLoop.Exit();
57 }
58
59 private:
60 wxModalEventLoop m_evtLoop;
61 };
62
63 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxDialogModalData);
64
65 // ============================================================================
66 // implementation
67 // ============================================================================
68
69 // ----------------------------------------------------------------------------
70 // wxDialog construction
71 // ----------------------------------------------------------------------------
72
73 void wxDialog::Init()
74 {
75 m_pOldFocus = (wxWindow *)NULL;
76 m_isShown = false;
77 m_pWindowDisabler = (wxWindowDisabler *)NULL;
78 m_modalData = NULL;
79 SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
80 } // end of wxDialog::Init
81
82 bool wxDialog::Create( wxWindow* pParent,
83 wxWindowID vId,
84 const wxString& rsTitle,
85 const wxPoint& rPos,
86 const wxSize& rSize,
87 long lStyle,
88 const wxString& rsName )
89 {
90 Init();
91 SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
92
93 //
94 // Save focus before doing anything which can potentially change it
95 //
96 m_pOldFocus = FindFocus();
97
98 //
99 // All dialogs should really have this style
100 //
101 lStyle |= wxTAB_TRAVERSAL;
102
103 if (!wxTopLevelWindow::Create( pParent
104 ,vId
105 ,rsTitle
106 ,rPos
107 ,rSize
108 ,lStyle
109 ,rsName
110 ))
111 return false;
112
113 SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
114
115 //
116 // Must defer setting the title until after dialog is created and sized
117 //
118 if (!rsTitle.IsNull())
119 SetTitle(rsTitle);
120 return true;
121 } // end of wxDialog::Create
122
123 #if WXWIN_COMPATIBILITY_2_6
124
125 // deprecated ctor
126 wxDialog::wxDialog(wxWindow *parent,
127 const wxString& title,
128 bool WXUNUSED(modal),
129 int x,
130 int y,
131 int w,
132 int h,
133 long style,
134 const wxString& name)
135 {
136 Init();
137
138 Create(parent, wxID_ANY, title, wxPoint(x, y), wxSize(w, h), style, name);
139 }
140
141 void wxDialog::SetModal(bool WXUNUSED(bFlag))
142 {
143 // nothing to do, obsolete method
144 } // end of wxDialog::SetModal
145
146 #endif // WXWIN_COMPATIBILITY_2_6
147
148 wxDialog::~wxDialog()
149 {
150 m_isBeingDeleted = true;
151
152 // this will also reenable all the other windows for a modal dialog
153 Show(false);
154 } // end of wxDialog::~wxDialog
155
156 // ----------------------------------------------------------------------------
157 // showing the dialogs
158 // ----------------------------------------------------------------------------
159
160 #if WXWIN_COMPATIBILITY_2_6
161
162 bool wxDialog::IsModalShowing() const
163 {
164 return IsModal();
165 } // end of wxDialog::IsModalShowing
166
167 #endif // WXWIN_COMPATIBILITY_2_6
168
169 wxWindow *wxDialog::FindSuitableParent() const
170 {
171 // first try to use the currently active window
172 HWND hwndFg = ::WinQueryActiveWindow(HWND_DESKTOP);
173 wxWindow *parent = hwndFg ? wxFindWinFromHandle((WXHWND)hwndFg)
174 : NULL;
175 if ( !parent )
176 {
177 // next try the main app window
178 parent = wxTheApp->GetTopWindow();
179 }
180
181 // finally, check if the parent we found is really suitable
182 if ( !parent || parent == (wxWindow *)this || !parent->IsShown() )
183 {
184 // don't use this one
185 parent = NULL;
186 }
187
188 return parent;
189 }
190
191 bool wxDialog::Show( bool bShow )
192 {
193 if ( bShow == IsShown() )
194 return false;
195
196 if (!bShow && m_modalData )
197 {
198 // we need to do this before calling wxDialogBase version because if we
199 // had disabled other app windows, they must be reenabled right now as
200 // if they stay disabled Windows will activate another window (one
201 // which is enabled, anyhow) when we're hidden in the base class Show()
202 // and we will lose activation
203 m_modalData->ExitLoop();
204 #if 0
205 if (m_pWindowDisabler)
206 {
207 delete m_pWindowDisabler;
208 m_pWindowDisabler = NULL;
209 }
210 #endif
211 }
212
213 if (bShow)
214 {
215 // this usually will result in TransferDataToWindow() being called
216 // which will change the controls values so do it before showing as
217 // otherwise we could have some flicker
218 InitDialog();
219 }
220
221 wxDialogBase::Show(bShow);
222
223 wxString title = GetTitle();
224 if (!title.empty())
225 ::WinSetWindowText((HWND)GetHwnd(), (PSZ)title.c_str());
226
227 if ( bShow )
228 {
229 // dialogs don't get WM_SIZE message after creation unlike most (all?)
230 // other windows and so could start their life not laid out correctly
231 // if we didn't call Layout() from here
232 //
233 // NB: normally we should call it just the first time but doing it
234 // every time is simpler than keeping a flag
235 Layout();
236 }
237
238 return true;
239 } // end of wxDialog::Show
240
241 //
242 // Replacement for Show(true) for modal dialogs - returns return code
243 //
244 int wxDialog::ShowModal()
245 {
246 wxASSERT_MSG( !IsModal(), _T("wxDialog::ShowModal() reentered?") );
247
248 m_endModalCalled = false;
249
250 Show();
251
252 // EndModal may have been called from InitDialog handler (called from
253 // inside Show()), which would cause an infinite loop if we didn't take it
254 // into account
255 if ( !m_endModalCalled )
256 {
257 // modal dialog needs a parent window, so try to find one
258 wxWindow *parent = GetParent();
259 if ( !parent )
260 {
261 parent = FindSuitableParent();
262 }
263
264 // remember where the focus was
265 wxWindow *oldFocus = m_pOldFocus;
266 if ( !oldFocus )
267 {
268 // VZ: do we really want to do this?
269 oldFocus = parent;
270 }
271
272 // We have to remember the HWND because we need to check
273 // the HWND still exists (oldFocus can be garbage when the dialog
274 // exits, if it has been destroyed)
275 HWND hwndOldFocus = oldFocus ? GetHwndOf(oldFocus) : NULL;
276
277
278 //
279 // Before entering the modal loop, reset the "is in OnIdle()" flag (see
280 // comment in app.cpp)
281 //
282 extern bool gbInOnIdle;
283 bool bWasInOnIdle = gbInOnIdle;
284
285 gbInOnIdle = false;
286
287 // enter and run the modal loop
288 {
289 wxDialogModalDataTiedPtr modalData(&m_modalData,
290 new wxDialogModalData(this));
291 modalData->RunLoop();
292 }
293 gbInOnIdle = bWasInOnIdle;
294
295 // and restore focus
296 // Note that this code MUST NOT access the dialog object's data
297 // in case the object has been deleted (which will be the case
298 // for a modal dialog that has been destroyed before calling EndModal).
299 if ( oldFocus && (oldFocus != this) && ::WinIsWindow(vHabmain, hwndOldFocus))
300 {
301 // This is likely to prove that the object still exists
302 if (wxFindWinFromHandle((WXHWND) hwndOldFocus) == oldFocus)
303 oldFocus->SetFocus();
304 }
305 }
306
307 return GetReturnCode();
308 } // end of wxDialog::ShowModal
309
310 void wxDialog::EndModal(
311 int nRetCode
312 )
313 {
314 wxASSERT_MSG( IsModal(), _T("EndModal() called for non modal dialog") );
315
316 m_endModalCalled = true;
317 SetReturnCode(nRetCode);
318
319 Hide();
320 } // end of wxDialog::EndModal
321
322 MRESULT wxDialog::OS2WindowProc( WXUINT uMessage, WXWPARAM wParam, WXLPARAM lParam )
323 {
324 MRESULT rc = 0;
325 bool bProcessed = false;
326
327 switch (uMessage)
328 {
329 case WM_CLOSE:
330 //
331 // If we can't close, tell the system that we processed the
332 // message - otherwise it would close us
333 //
334 bProcessed = !Close();
335 break;
336 }
337
338 if (!bProcessed)
339 rc = wxWindow::OS2WindowProc( uMessage
340 ,wParam
341 ,lParam
342 );
343 return rc;
344 } // end of wxDialog::OS2WindowProc