src/msw/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/dialog.cpp
   3 // Purpose:     wxDialog class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   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 "dialog.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 #ifndef WX_PRECOMP
  32     #include "wx/dialog.h"
  33     #include "wx/utils.h"
  34     #include "wx/frame.h"
  35     #include "wx/app.h"
  36     #include "wx/settings.h"
  37     #include "wx/intl.h"
  38     #include "wx/log.h"
  39 #endif
  40
  41 #include "wx/msw/private.h"
  42 #include "wx/log.h"
  43 #include "wx/evtloop.h"
  44 #include "wx/ptr_scpd.h"
  45
  46 #if wxUSE_COMMON_DIALOGS && !defined(__WXMICROWIN__)
  47     #include <commdlg.h>
  48 #endif
  49
  50 #if defined(__SMARTPHONE__) && defined(__WXWINCE__)
  51     #include "wx/msw/wince/resources.h"
  52 #endif // __SMARTPHONE__ && __WXWINCE__
  53
  54 // ----------------------------------------------------------------------------
  55 // wxWin macros
  56 // ----------------------------------------------------------------------------
  57
  58 #if wxUSE_EXTENDED_RTTI
  59 WX_DEFINE_FLAGS( wxDialogStyle )
  60
  61 wxBEGIN_FLAGS( wxDialogStyle )
  62     // new style border flags, we put them first to
  63     // use them for streaming out
  64     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  65     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  66     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  67     wxFLAGS_MEMBER(wxBORDER_RAISED)
  68     wxFLAGS_MEMBER(wxBORDER_STATIC)
  69     wxFLAGS_MEMBER(wxBORDER_NONE)
  70
  71     // old style border flags
  72     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  73     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  74     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  75     wxFLAGS_MEMBER(wxRAISED_BORDER)
  76     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  77     wxFLAGS_MEMBER(wxNO_BORDER)
  78
  79     // standard window styles
  80     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  81     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  82
  83     // dialog styles
  84     wxFLAGS_MEMBER(wxWS_EX_VALIDATE_RECURSIVELY)
  85     wxFLAGS_MEMBER(wxSTAY_ON_TOP)
  86     wxFLAGS_MEMBER(wxCAPTION)
  87     wxFLAGS_MEMBER(wxTHICK_FRAME)
  88     wxFLAGS_MEMBER(wxSYSTEM_MENU)
  89     wxFLAGS_MEMBER(wxRESIZE_BORDER)
  90     wxFLAGS_MEMBER(wxRESIZE_BOX)
  91     wxFLAGS_MEMBER(wxCLOSE_BOX)
  92     wxFLAGS_MEMBER(wxMAXIMIZE_BOX)
  93     wxFLAGS_MEMBER(wxMINIMIZE_BOX)
  94 wxEND_FLAGS( wxDialogStyle )
  95
  96 IMPLEMENT_DYNAMIC_CLASS_XTI(wxDialog, wxTopLevelWindow,"wx/dialog.h")
  97
  98 wxBEGIN_PROPERTIES_TABLE(wxDialog)
  99     wxPROPERTY( Title, wxString, SetTitle, GetTitle, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 100     wxPROPERTY_FLAGS( WindowStyle , wxDialogStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 101 wxEND_PROPERTIES_TABLE()
 102
 103 wxBEGIN_HANDLERS_TABLE(wxDialog)
 104 wxEND_HANDLERS_TABLE()
 105
 106 wxCONSTRUCTOR_6( wxDialog , wxWindow* , Parent , wxWindowID , Id , wxString , Title , wxPoint , Position , wxSize , Size , long , WindowStyle)
 107
 108 #else
 109 IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxTopLevelWindow)
 110 #endif
 111
 112 BEGIN_EVENT_TABLE(wxDialog, wxDialogBase)
 113     EVT_BUTTON(wxID_OK, wxDialog::OnOK)
 114     EVT_BUTTON(wxID_APPLY, wxDialog::OnApply)
 115     EVT_BUTTON(wxID_CANCEL, wxDialog::OnCancel)
 116
 117     EVT_SYS_COLOUR_CHANGED(wxDialog::OnSysColourChanged)
 118
 119     EVT_CLOSE(wxDialog::OnCloseWindow)
 120 END_EVENT_TABLE()
 121
 122 // ----------------------------------------------------------------------------
 123 // wxDialogModalData
 124 // ----------------------------------------------------------------------------
 125
 126 // this is simply a container for any data we need to implement modality which
 127 // allows us to avoid changing wxDialog each time the implementation changes
 128 class wxDialogModalData
 129 {
 130 public:
 131     wxDialogModalData(wxDialog *dialog) : m_evtLoop(dialog) { }
 132
 133     void RunLoop()
 134     {
 135         m_evtLoop.Run();
 136     }
 137
 138     void ExitLoop()
 139     {
 140         m_evtLoop.Exit();
 141     }
 142
 143 private:
 144     wxModalEventLoop m_evtLoop;
 145 };
 146
 147 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxDialogModalData);
 148
 149 // ============================================================================
 150 // implementation
 151 // ============================================================================
 152
 153 // ----------------------------------------------------------------------------
 154 // wxDialog construction
 155 // ----------------------------------------------------------------------------
 156
 157 void wxDialog::Init()
 158 {
 159     m_oldFocus = (wxWindow *)NULL;
 160     m_isShown = false;
 161     m_modalData = NULL;
 162     m_endModalCalled = false;
 163 }
 164
 165 bool wxDialog::Create(wxWindow *parent,
 166                       wxWindowID id,
 167                       const wxString& title,
 168                       const wxPoint& pos,
 169                       const wxSize& size,
 170                       long style,
 171                       const wxString& name)
 172 {
 173     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
 174
 175     // save focus before doing anything which can potentially change it
 176     m_oldFocus = FindFocus();
 177
 178     // All dialogs should really have this style
 179     style |= wxTAB_TRAVERSAL;
 180
 181     if ( !wxTopLevelWindow::Create(parent, id, title, pos, size, style, name) )
 182         return false;
 183
 184     if ( !m_hasFont )
 185         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 186
 187 #if defined(__SMARTPHONE__) && defined(__WXWINCE__)
 188     SetLeftMenu(wxID_OK, _("OK"));
 189 #endif
 190
 191     return true;
 192 }
 193
 194 // deprecated ctor
 195 wxDialog::wxDialog(wxWindow *parent,
 196                    const wxString& title,
 197                    bool WXUNUSED(modal),
 198                    int x,
 199                    int y,
 200                    int w,
 201                    int h,
 202                    long style,
 203                    const wxString& name)
 204 {
 205     Init();
 206
 207     Create(parent, wxID_ANY, title, wxPoint(x, y), wxSize(w, h), style, name);
 208 }
 209
 210 void wxDialog::SetModal(bool WXUNUSED(flag))
 211 {
 212     // nothing to do, obsolete method
 213 }
 214
 215 wxDialog::~wxDialog()
 216 {
 217     m_isBeingDeleted = true;
 218
 219     // this will also reenable all the other windows for a modal dialog
 220     Show(false);
 221 }
 222
 223 // ----------------------------------------------------------------------------
 224 // showing the dialogs
 225 // ----------------------------------------------------------------------------
 226
 227 bool wxDialog::IsModalShowing() const
 228 {
 229     return IsModal();
 230 }
 231
 232 wxWindow *wxDialog::FindSuitableParent() const
 233 {
 234     // first try to use the currently active window
 235     HWND hwndFg = ::GetForegroundWindow();
 236     wxWindow *parent = hwndFg ? wxFindWinFromHandle((WXHWND)hwndFg)
 237                               : NULL;
 238     if ( !parent )
 239     {
 240         // next try the main app window
 241         parent = wxTheApp->GetTopWindow();
 242     }
 243
 244     // finally, check if the parent we found is really suitable
 245     if ( !parent || parent == (wxWindow *)this || !parent->IsShown() )
 246     {
 247         // don't use this one
 248         parent = NULL;
 249     }
 250
 251     return parent;
 252 }
 253
 254 bool wxDialog::Show(bool show)
 255 {
 256     if ( show == IsShown() )
 257         return false;
 258
 259     if ( !show && m_modalData )
 260     {
 261         // we need to do this before calling wxDialogBase version because if we
 262         // had disabled other app windows, they must be reenabled right now as
 263         // if they stay disabled Windows will activate another window (one
 264         // which is enabled, anyhow) when we're hidden in the base class Show()
 265         // and we will lose activation
 266         m_modalData->ExitLoop();
 267     }
 268
 269     if ( show )
 270     {
 271         // this usually will result in TransferDataToWindow() being called
 272         // which will change the controls values so do it before showing as
 273         // otherwise we could have some flicker
 274         InitDialog();
 275     }
 276
 277     wxDialogBase::Show(show);
 278
 279     if ( show )
 280     {
 281         // dialogs don't get WM_SIZE message after creation unlike most (all?)
 282         // other windows and so could start their life non laid out correctly
 283         // if we didn't call Layout() from here
 284         //
 285         // NB: normally we should call it just the first time but doing it
 286         //     every time is simpler than keeping a flag
 287         Layout();
 288     }
 289
 290     return true;
 291 }
 292
 293 void wxDialog::Raise()
 294 {
 295     ::SetForegroundWindow(GetHwnd());
 296 }
 297
 298 // show dialog modally
 299 int wxDialog::ShowModal()
 300 {
 301     wxASSERT_MSG( !IsModal(), _T("wxDialog::ShowModal() reentered?") );
 302
 303     m_endModalCalled = false;
 304
 305     Show();
 306
 307     // EndModal may have been called from InitDialog handler (called from
 308     // inside Show()), which would cause an infinite loop if we didn't take it
 309     // into account
 310     if ( !m_endModalCalled )
 311     {
 312         // modal dialog needs a parent window, so try to find one
 313         wxWindow *parent = GetParent();
 314         if ( !parent )
 315         {
 316             parent = FindSuitableParent();
 317         }
 318
 319         // remember where the focus was
 320         wxWindow *oldFocus = m_oldFocus;
 321         if ( !oldFocus )
 322         {
 323             // VZ: do we really want to do this?
 324             oldFocus = parent;
 325         }
 326
 327         // We have to remember the HWND because we need to check
 328         // the HWND still exists (oldFocus can be garbage when the dialog
 329         // exits, if it has been destroyed)
 330         HWND hwndOldFocus = oldFocus ? GetHwndOf(oldFocus) : NULL;
 331
 332
 333         // enter and run the modal loop
 334         {
 335             wxDialogModalDataTiedPtr modalData(&m_modalData,
 336                                                new wxDialogModalData(this));
 337             modalData->RunLoop();
 338         }
 339
 340
 341         // and restore focus
 342         // Note that this code MUST NOT access the dialog object's data
 343         // in case the object has been deleted (which will be the case
 344         // for a modal dialog that has been destroyed before calling EndModal).
 345         if ( oldFocus && (oldFocus != this) && ::IsWindow(hwndOldFocus))
 346         {
 347             // This is likely to prove that the object still exists
 348             if (wxFindWinFromHandle((WXHWND) hwndOldFocus) == oldFocus)
 349                 oldFocus->SetFocus();
 350         }
 351     }
 352
 353     return GetReturnCode();
 354 }
 355
 356 void wxDialog::EndModal(int retCode)
 357 {
 358     wxASSERT_MSG( IsModal(), _T("EndModal() called for non modal dialog") );
 359
 360     m_endModalCalled = true;
 361     SetReturnCode(retCode);
 362
 363     Hide();
 364 }
 365
 366 void wxDialog::EndDialog(int rc)
 367 {
 368     if ( IsModal() )
 369         EndModal(rc);
 370     else
 371         Hide();
 372 }
 373
 374 // ----------------------------------------------------------------------------
 375 // wxWin event handlers
 376 // ----------------------------------------------------------------------------
 377
 378 // Standard buttons
 379 void wxDialog::OnOK(wxCommandEvent& WXUNUSED(event))
 380 {
 381   if ( Validate() && TransferDataFromWindow() )
 382   {
 383       EndDialog(wxID_OK);
 384   }
 385 }
 386
 387 void wxDialog::OnApply(wxCommandEvent& WXUNUSED(event))
 388 {
 389     if ( Validate() )
 390         TransferDataFromWindow();
 391
 392     // TODO probably need to disable the Apply button until things change again
 393 }
 394
 395 void wxDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
 396 {
 397     EndDialog(wxID_CANCEL);
 398 }
 399
 400 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 401 {
 402     // We'll send a Cancel message by default, which may close the dialog.
 403     // Check for looping if the Cancel event handler calls Close().
 404
 405     // Note that if a cancel button and handler aren't present in the dialog,
 406     // nothing will happen when you close the dialog via the window manager, or
 407     // via Close(). We wouldn't want to destroy the dialog by default, since
 408     // the dialog may have been created on the stack. However, this does mean
 409     // that calling dialog->Close() won't delete the dialog unless the handler
 410     // for wxID_CANCEL does so. So use Destroy() if you want to be sure to
 411     // destroy the dialog. The default OnCancel (above) simply ends a modal
 412     // dialog, and hides a modeless dialog.
 413
 414     // VZ: this is horrible and MT-unsafe. Can't we reuse some of these global
 415     //     lists here? don't dare to change it now, but should be done later!
 416     static wxList closing;
 417
 418     if ( closing.Member(this) )
 419         return;
 420
 421     closing.Append(this);
 422
 423     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 424     cancelEvent.SetEventObject( this );
 425     GetEventHandler()->ProcessEvent(cancelEvent); // This may close the dialog
 426
 427     closing.DeleteObject(this);
 428 }
 429
 430 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
 431 {
 432     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 433     Refresh();
 434 }
 435
 436 // ---------------------------------------------------------------------------
 437 // dialog window proc
 438 // ---------------------------------------------------------------------------
 439
 440 WXLRESULT wxDialog::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 441 {
 442     WXLRESULT rc = 0;
 443     bool processed = false;
 444
 445     switch ( message )
 446     {
 447 #ifdef __WXWINCE__
 448         // react to pressing the OK button in the title
 449         case WM_COMMAND:
 450         {
 451             switch ( LOWORD(wParam) )
 452             {
 453 #ifndef __SMARTPHONE__
 454                 case IDOK:
 455                     // First, try the OK button, since it's closest in meaning.
 456                     wxButton *btn = wxDynamicCast(FindWindow(wxID_OK), wxButton);
 457
 458                     // Next, try Cancel or Close buttons
 459                     if (!btn)
 460                         btn = wxDynamicCast(FindWindow(wxID_CANCEL), wxButton);
 461                     if (!btn)
 462                         btn = wxDynamicCast(FindWindow(wxID_CLOSE), wxButton);
 463
 464                     if ( btn && btn->IsEnabled() )
 465                     {
 466                         // if we do have a cancel button, do press it
 467                         btn->MSWCommand(BN_CLICKED, 0 /* unused */);
 468                         processed = true;
 469                         break;
 470                     }
 471                     else
 472                     {
 473                         // Finally, if there aren't appropriate buttons,
 474                         // act as if it were the normal close button.
 475                         processed = !Close();
 476                     }
 477
 478 #else // ifdef __SMARTPHONE__
 479                 case IDM_LEFT:
 480                 case IDM_RIGHT:
 481                     processed = HandleCommand( LOWORD(wParam) , 0 , NULL );
 482                     break;
 483 #endif // __SMARTPHONE__
 484             }
 485             break;
 486         }
 487 #endif
 488         case WM_CLOSE:
 489             // if we can't close, tell the system that we processed the
 490             // message - otherwise it would close us
 491             processed = !Close();
 492             break;
 493
 494         case WM_SIZE:
 495             // the Windows dialogs unfortunately are not meant to be resizeable
 496             // at all and their standard class doesn't include CS_[VH]REDRAW
 497             // styles which means that the window is not refreshed properly
 498             // after the resize and no amount of WS_CLIPCHILDREN/SIBLINGS can
 499             // help with it - so we have to refresh it manually which certainly
 500             // creates flicker but at least doesn't show garbage on the screen
 501             rc = wxWindow::MSWWindowProc(message, wParam, lParam);
 502             processed = true;
 503             if ( HasFlag(wxFULL_REPAINT_ON_RESIZE) )
 504             {
 505                 ::InvalidateRect(GetHwnd(), NULL, false /* erase bg */);
 506             }
 507             break;
 508
 509 #ifndef __WXMICROWIN__
 510         case WM_SETCURSOR:
 511             // we want to override the busy cursor for modal dialogs:
 512             // typically, wxBeginBusyCursor() is called and then a modal dialog
 513             // is shown, but the modal dialog shouldn't have hourglass cursor
 514             if ( IsModal() && wxIsBusy() )
 515             {
 516                 // set our cursor for all windows (but see below)
 517                 wxCursor cursor = m_cursor;
 518                 if ( !cursor.Ok() )
 519                     cursor = wxCURSOR_ARROW;
 520
 521                 ::SetCursor(GetHcursorOf(cursor));
 522
 523                 // in any case, stop here and don't let wxWindow process this
 524                 // message (it would set the busy cursor)
 525                 processed = true;
 526
 527                 // but return false to tell the child window (if the event
 528                 // comes from one of them and not from ourselves) that it can
 529                 // set its own cursor if it has one: thus, standard controls
 530                 // (e.g. text ctrl) still have correct cursors in a dialog
 531                 // invoked while wxIsBusy()
 532                 rc = false;
 533             }
 534             break;
 535 #endif // __WXMICROWIN__
 536     }
 537
 538     if ( !processed )
 539         rc = wxWindow::MSWWindowProc(message, wParam, lParam);
 540
 541     return rc;
 542 }
 543