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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/dialog.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/msw/wrapcdlg.h"
  31     #include "wx/utils.h"
  32     #include "wx/frame.h"
  33     #include "wx/app.h"
  34     #include "wx/button.h"
  35     #include "wx/settings.h"
  36     #include "wx/intl.h"
  37     #include "wx/log.h"
  38     #include "wx/toolbar.h"
  39 #endif
  40
  41 #include "wx/msw/private.h"
  42 #include "wx/evtloop.h"
  43 #include "wx/ptr_scpd.h"
  44
  45 #if defined(__SMARTPHONE__) && defined(__WXWINCE__)
  46     #include "wx/msw/wince/resources.h"
  47 #endif // __SMARTPHONE__ && __WXWINCE__
  48
  49 // ----------------------------------------------------------------------------
  50 // wxWin macros
  51 // ----------------------------------------------------------------------------
  52
  53 #if wxUSE_EXTENDED_RTTI
  54 WX_DEFINE_FLAGS( wxDialogStyle )
  55
  56 wxBEGIN_FLAGS( wxDialogStyle )
  57     // new style border flags, we put them first to
  58     // use them for streaming out
  59     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  60     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  61     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  62     wxFLAGS_MEMBER(wxBORDER_RAISED)
  63     wxFLAGS_MEMBER(wxBORDER_STATIC)
  64     wxFLAGS_MEMBER(wxBORDER_NONE)
  65
  66     // old style border flags
  67     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  68     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  69     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  70     wxFLAGS_MEMBER(wxRAISED_BORDER)
  71     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  72     wxFLAGS_MEMBER(wxNO_BORDER)
  73
  74     // standard window styles
  75     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  76     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  77
  78     // dialog styles
  79     wxFLAGS_MEMBER(wxWS_EX_VALIDATE_RECURSIVELY)
  80     wxFLAGS_MEMBER(wxSTAY_ON_TOP)
  81     wxFLAGS_MEMBER(wxCAPTION)
  82 #if WXWIN_COMPATIBILITY_2_6
  83     wxFLAGS_MEMBER(wxTHICK_FRAME)
  84 #endif // WXWIN_COMPATIBILITY_2_6
  85     wxFLAGS_MEMBER(wxSYSTEM_MENU)
  86     wxFLAGS_MEMBER(wxRESIZE_BORDER)
  87 #if WXWIN_COMPATIBILITY_2_6
  88     wxFLAGS_MEMBER(wxRESIZE_BOX)
  89 #endif // WXWIN_COMPATIBILITY_2_6
  90     wxFLAGS_MEMBER(wxCLOSE_BOX)
  91     wxFLAGS_MEMBER(wxMAXIMIZE_BOX)
  92     wxFLAGS_MEMBER(wxMINIMIZE_BOX)
  93 wxEND_FLAGS( wxDialogStyle )
  94
  95 IMPLEMENT_DYNAMIC_CLASS_XTI(wxDialog, wxTopLevelWindow,"wx/dialog.h")
  96
  97 wxBEGIN_PROPERTIES_TABLE(wxDialog)
  98     wxPROPERTY( Title, wxString, SetTitle, GetTitle, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
  99     wxPROPERTY_FLAGS( WindowStyle , wxDialogStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 100 wxEND_PROPERTIES_TABLE()
 101
 102 wxBEGIN_HANDLERS_TABLE(wxDialog)
 103 wxEND_HANDLERS_TABLE()
 104
 105 wxCONSTRUCTOR_6( wxDialog , wxWindow* , Parent , wxWindowID , Id , wxString , Title , wxPoint , Position , wxSize , Size , long , WindowStyle)
 106
 107 #else
 108 IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxTopLevelWindow)
 109 #endif
 110
 111 // ----------------------------------------------------------------------------
 112 // wxDialogModalData
 113 // ----------------------------------------------------------------------------
 114
 115 // this is simply a container for any data we need to implement modality which
 116 // allows us to avoid changing wxDialog each time the implementation changes
 117 class wxDialogModalData
 118 {
 119 public:
 120     wxDialogModalData(wxDialog *dialog) : m_evtLoop(dialog) { }
 121
 122     void RunLoop()
 123     {
 124         m_evtLoop.Run();
 125     }
 126
 127     void ExitLoop()
 128     {
 129         m_evtLoop.Exit();
 130     }
 131
 132 private:
 133     wxModalEventLoop m_evtLoop;
 134 };
 135
 136 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxDialogModalData)
 137
 138 // ============================================================================
 139 // implementation
 140 // ============================================================================
 141
 142 // ----------------------------------------------------------------------------
 143 // wxDialog construction
 144 // ----------------------------------------------------------------------------
 145
 146 void wxDialog::Init()
 147 {
 148     m_oldFocus = (wxWindow *)NULL;
 149     m_isShown = false;
 150     m_modalData = NULL;
 151     m_endModalCalled = false;
 152 #if wxUSE_TOOLBAR && defined(__POCKETPC__)
 153     m_dialogToolBar = NULL;
 154 #endif
 155     m_hGripper = 0;
 156 }
 157
 158 bool wxDialog::Create(wxWindow *parent,
 159                       wxWindowID id,
 160                       const wxString& title,
 161                       const wxPoint& pos,
 162                       const wxSize& size,
 163                       long style,
 164                       const wxString& name)
 165 {
 166     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
 167
 168     // save focus before doing anything which can potentially change it
 169     m_oldFocus = FindFocus();
 170
 171     // All dialogs should really have this style
 172     style |= wxTAB_TRAVERSAL;
 173
 174     if ( !wxTopLevelWindow::Create(parent, id, title, pos, size, style, name) )
 175         return false;
 176
 177     if ( !m_hasFont )
 178         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 179
 180 #if defined(__SMARTPHONE__) && defined(__WXWINCE__)
 181     SetLeftMenu(wxID_OK, _("OK"));
 182 #endif
 183 #if wxUSE_TOOLBAR && defined(__POCKETPC__)
 184     CreateToolBar();
 185 #endif
 186
 187     if ( HasFlag(wxRESIZE_BORDER) )
 188     {
 189         CreateGripper();
 190
 191         Connect(wxEVT_CREATE,
 192                 wxWindowCreateEventHandler(wxDialog::OnWindowCreate));
 193     }
 194
 195     return true;
 196 }
 197
 198 wxDialog::~wxDialog()
 199 {
 200     m_isBeingDeleted = true;
 201
 202     // this will also reenable all the other windows for a modal dialog
 203     Show(false);
 204
 205     DestroyGripper();
 206 }
 207
 208 // ----------------------------------------------------------------------------
 209 // showing the dialogs
 210 // ----------------------------------------------------------------------------
 211
 212 wxWindow *wxDialog::FindSuitableParent() const
 213 {
 214     // first try to use the currently active window
 215     HWND hwndFg = ::GetForegroundWindow();
 216     wxWindow *parent = hwndFg ? wxFindWinFromHandle((WXHWND)hwndFg)
 217                               : NULL;
 218     if ( !parent )
 219     {
 220         // next try the main app window
 221         parent = wxTheApp->GetTopWindow();
 222     }
 223
 224     // finally, check if the parent we found is really suitable
 225     if ( !parent || parent == (wxWindow *)this || !parent->IsShown() )
 226     {
 227         // don't use this one
 228         parent = NULL;
 229     }
 230
 231     return parent;
 232 }
 233
 234 bool wxDialog::Show(bool show)
 235 {
 236     if ( show == IsShown() )
 237         return false;
 238
 239     if ( !show && m_modalData )
 240     {
 241         // we need to do this before calling wxDialogBase version because if we
 242         // had disabled other app windows, they must be reenabled right now as
 243         // if they stay disabled Windows will activate another window (one
 244         // which is enabled, anyhow) when we're hidden in the base class Show()
 245         // and we will lose activation
 246         m_modalData->ExitLoop();
 247     }
 248
 249     if ( show )
 250     {
 251         if (CanDoLayoutAdaptation())
 252             DoLayoutAdaptation();
 253
 254         // this usually will result in TransferDataToWindow() being called
 255         // which will change the controls values so do it before showing as
 256         // otherwise we could have some flicker
 257         InitDialog();
 258     }
 259
 260     wxDialogBase::Show(show);
 261
 262     if ( show )
 263     {
 264         // dialogs don't get WM_SIZE message from ::ShowWindow() for some
 265         // reason so generate it ourselves for consistency with frames and
 266         // dialogs in other ports
 267         //
 268         // NB: normally we should call it just the first time but doing it
 269         //     every time is simpler than keeping a flag
 270         const wxSize size = GetClientSize();
 271         ::SendMessage(GetHwnd(), WM_SIZE,
 272                       SIZE_RESTORED, MAKELPARAM(size.x, size.y));
 273     }
 274
 275     return true;
 276 }
 277
 278 void wxDialog::Raise()
 279 {
 280     ::SetForegroundWindow(GetHwnd());
 281 }
 282
 283 // show dialog modally
 284 int wxDialog::ShowModal()
 285 {
 286     wxASSERT_MSG( !IsModal(), _T("ShowModal() can't be called twice") );
 287
 288     m_endModalCalled = false;
 289
 290     Show();
 291
 292     // EndModal may have been called from InitDialog handler (called from
 293     // inside Show()), which would cause an infinite loop if we didn't take it
 294     // into account
 295     if ( !m_endModalCalled )
 296     {
 297         // modal dialog needs a parent window, so try to find one
 298         wxWindow *parent = GetParent();
 299         if ( !parent )
 300         {
 301             parent = FindSuitableParent();
 302         }
 303
 304         // remember where the focus was
 305         wxWindow *oldFocus = m_oldFocus;
 306         if ( !oldFocus )
 307         {
 308             // VZ: do we really want to do this?
 309             oldFocus = parent;
 310         }
 311
 312         // We have to remember the HWND because we need to check
 313         // the HWND still exists (oldFocus can be garbage when the dialog
 314         // exits, if it has been destroyed)
 315         HWND hwndOldFocus = oldFocus ? GetHwndOf(oldFocus) : NULL;
 316
 317
 318         // enter and run the modal loop
 319         {
 320             wxDialogModalDataTiedPtr modalData(&m_modalData,
 321                                                new wxDialogModalData(this));
 322             modalData->RunLoop();
 323         }
 324
 325
 326         // and restore focus
 327         // Note that this code MUST NOT access the dialog object's data
 328         // in case the object has been deleted (which will be the case
 329         // for a modal dialog that has been destroyed before calling EndModal).
 330         if ( oldFocus && (oldFocus != this) && ::IsWindow(hwndOldFocus))
 331         {
 332             // This is likely to prove that the object still exists
 333             if (wxFindWinFromHandle((WXHWND) hwndOldFocus) == oldFocus)
 334                 oldFocus->SetFocus();
 335         }
 336     }
 337
 338     return GetReturnCode();
 339 }
 340
 341 void wxDialog::EndModal(int retCode)
 342 {
 343     wxASSERT_MSG( IsModal(), _T("EndModal() called for non modal dialog") );
 344
 345     m_endModalCalled = true;
 346     SetReturnCode(retCode);
 347
 348     Hide();
 349 }
 350
 351 // ----------------------------------------------------------------------------
 352 // wxDialog gripper handling
 353 // ----------------------------------------------------------------------------
 354
 355 void wxDialog::SetWindowStyleFlag(long style)
 356 {
 357     wxDialogBase::SetWindowStyleFlag(style);
 358
 359     if ( HasFlag(wxRESIZE_BORDER) )
 360         CreateGripper();
 361     else
 362         DestroyGripper();
 363 }
 364
 365 void wxDialog::CreateGripper()
 366 {
 367     if ( !m_hGripper )
 368     {
 369         // just create it here, it will be positioned and shown later
 370         m_hGripper = (WXHWND)::CreateWindow
 371                                (
 372                                     wxT("SCROLLBAR"),
 373                                     wxT(""),
 374                                     WS_CHILD |
 375                                     WS_CLIPSIBLINGS |
 376                                     SBS_SIZEGRIP |
 377                                     SBS_SIZEBOX |
 378                                     SBS_SIZEBOXBOTTOMRIGHTALIGN,
 379                                     0, 0, 0, 0,
 380                                     GetHwnd(),
 381                                     0,
 382                                     wxGetInstance(),
 383                                     NULL
 384                                );
 385     }
 386 }
 387
 388 void wxDialog::DestroyGripper()
 389 {
 390     if ( m_hGripper )
 391     {
 392         // we used to have trouble with gripper appearing on top (and hence
 393         // overdrawing) the other, real, dialog children -- check that this
 394         // isn't the case automatically (but notice that this could be false if
 395         // we're not shown at all as in this case ResizeGripper() might not
 396         // have been called yet)
 397         wxASSERT_MSG( !IsShown() ||
 398                       ::GetWindow((HWND)m_hGripper, GW_HWNDNEXT) == 0,
 399             _T("Bug in wxWidgets: gripper should be at the bottom of Z-order") );
 400         ::DestroyWindow((HWND) m_hGripper);
 401         m_hGripper = 0;
 402     }
 403 }
 404
 405 void wxDialog::ShowGripper(bool show)
 406 {
 407     wxASSERT_MSG( m_hGripper, _T("shouldn't be called if we have no gripper") );
 408
 409     if ( show )
 410         ResizeGripper();
 411
 412     ::ShowWindow((HWND)m_hGripper, show ? SW_SHOW : SW_HIDE);
 413 }
 414
 415 void wxDialog::ResizeGripper()
 416 {
 417     wxASSERT_MSG( m_hGripper, _T("shouldn't be called if we have no gripper") );
 418
 419     HWND hwndGripper = (HWND)m_hGripper;
 420
 421     const wxRect rectGripper = wxRectFromRECT(wxGetWindowRect(hwndGripper));
 422     const wxSize size = GetClientSize() - rectGripper.GetSize();
 423
 424     ::SetWindowPos(hwndGripper, HWND_BOTTOM,
 425                    size.x, size.y,
 426                    rectGripper.width, rectGripper.height,
 427                    SWP_NOACTIVATE);
 428 }
 429
 430 void wxDialog::OnWindowCreate(wxWindowCreateEvent& event)
 431 {
 432     if ( m_hGripper && IsShown() &&
 433             event.GetWindow() && event.GetWindow()->GetParent() == this )
 434     {
 435         // Put gripper below the newly created child window
 436         ::SetWindowPos((HWND)m_hGripper, HWND_BOTTOM, 0, 0, 0, 0,
 437                        SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE);
 438     }
 439
 440     event.Skip();
 441 }
 442
 443 // ----------------------------------------------------------------------------
 444 // wxWin event handlers
 445 // ----------------------------------------------------------------------------
 446
 447 #ifdef __POCKETPC__
 448 // Responds to the OK button in a PocketPC titlebar. This
 449 // can be overridden, or you can change the id used for
 450 // sending the event, by calling SetAffirmativeId.
 451 bool wxDialog::DoOK()
 452 {
 453     const int idOk = GetAffirmativeId();
 454     if ( EmulateButtonClickIfPresent(idOk) )
 455         return true;
 456
 457     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, GetAffirmativeId());
 458     event.SetEventObject(this);
 459
 460     return HandleWindowEvent(event);
 461 }
 462 #endif // __POCKETPC__
 463
 464 #if wxUSE_TOOLBAR && defined(__POCKETPC__)
 465 // create main toolbar by calling OnCreateToolBar()
 466 wxToolBar* wxDialog::CreateToolBar(long style, wxWindowID winid, const wxString& name)
 467 {
 468     m_dialogToolBar = OnCreateToolBar(style, winid, name);
 469
 470     return m_dialogToolBar;
 471 }
 472
 473 // return a new toolbar
 474 wxToolBar *wxDialog::OnCreateToolBar(long style,
 475                                        wxWindowID winid,
 476                                        const wxString& name)
 477 {
 478     return new wxToolMenuBar(this, winid,
 479                          wxDefaultPosition, wxDefaultSize,
 480                          style, name);
 481 }
 482 #endif
 483
 484 // ---------------------------------------------------------------------------
 485 // dialog Windows messages processing
 486 // ---------------------------------------------------------------------------
 487
 488 WXLRESULT wxDialog::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 489 {
 490     WXLRESULT rc = 0;
 491     bool processed = false;
 492
 493     switch ( message )
 494     {
 495 #ifdef __WXWINCE__
 496         // react to pressing the OK button in the title
 497         case WM_COMMAND:
 498         {
 499             switch ( LOWORD(wParam) )
 500             {
 501 #ifdef __POCKETPC__
 502                 case IDOK:
 503                     processed = DoOK();
 504                     if (!processed)
 505                         processed = !Close();
 506 #endif
 507 #ifdef __SMARTPHONE__
 508                 case IDM_LEFT:
 509                 case IDM_RIGHT:
 510                     processed = HandleCommand( LOWORD(wParam) , 0 , NULL );
 511                     break;
 512 #endif // __SMARTPHONE__
 513             }
 514             break;
 515         }
 516 #endif
 517         case WM_CLOSE:
 518             // if we can't close, tell the system that we processed the
 519             // message - otherwise it would close us
 520             processed = !Close();
 521             break;
 522
 523         case WM_SIZE:
 524             if ( m_hGripper )
 525             {
 526                 switch ( wParam )
 527                 {
 528                     case SIZE_MAXIMIZED:
 529                         ShowGripper(false);
 530                         break;
 531
 532                     case SIZE_RESTORED:
 533                         ShowGripper(true);
 534                 }
 535             }
 536
 537             // the Windows dialogs unfortunately are not meant to be resizeable
 538             // at all and their standard class doesn't include CS_[VH]REDRAW
 539             // styles which means that the window is not refreshed properly
 540             // after the resize and no amount of WS_CLIPCHILDREN/SIBLINGS can
 541             // help with it - so we have to refresh it manually which certainly
 542             // creates flicker but at least doesn't show garbage on the screen
 543             rc = wxWindow::MSWWindowProc(message, wParam, lParam);
 544             processed = true;
 545             if ( HasFlag(wxFULL_REPAINT_ON_RESIZE) )
 546             {
 547                 ::InvalidateRect(GetHwnd(), NULL, false /* erase bg */);
 548             }
 549             break;
 550
 551 #ifndef __WXMICROWIN__
 552         case WM_SETCURSOR:
 553             // we want to override the busy cursor for modal dialogs:
 554             // typically, wxBeginBusyCursor() is called and then a modal dialog
 555             // is shown, but the modal dialog shouldn't have hourglass cursor
 556             if ( IsModal() && wxIsBusy() )
 557             {
 558                 // set our cursor for all windows (but see below)
 559                 wxCursor cursor = m_cursor;
 560                 if ( !cursor.Ok() )
 561                     cursor = wxCURSOR_ARROW;
 562
 563                 ::SetCursor(GetHcursorOf(cursor));
 564
 565                 // in any case, stop here and don't let wxWindow process this
 566                 // message (it would set the busy cursor)
 567                 processed = true;
 568
 569                 // but return false to tell the child window (if the event
 570                 // comes from one of them and not from ourselves) that it can
 571                 // set its own cursor if it has one: thus, standard controls
 572                 // (e.g. text ctrl) still have correct cursors in a dialog
 573                 // invoked while wxIsBusy()
 574                 rc = false;
 575             }
 576             break;
 577 #endif // __WXMICROWIN__
 578     }
 579
 580     if ( !processed )
 581         rc = wxWindow::MSWWindowProc(message, wParam, lParam);
 582
 583     return rc;
 584 }