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 #include "wx/modalhook.h"
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/msw/wrapcdlg.h"
  32     #include "wx/utils.h"
  33     #include "wx/frame.h"
  34     #include "wx/app.h"
  35     #include "wx/button.h"
  36     #include "wx/settings.h"
  37     #include "wx/intl.h"
  38     #include "wx/log.h"
  39     #include "wx/toolbar.h"
  40 #endif
  41
  42 #include "wx/msw/private.h"
  43 #include "wx/evtloop.h"
  44 #include "wx/scopedptr.h"
  45
  46 #if defined(__SMARTPHONE__) && defined(__WXWINCE__)
  47     #include "wx/msw/wince/resources.h"
  48 #endif // __SMARTPHONE__ && __WXWINCE__
  49
  50 // ----------------------------------------------------------------------------
  51 // wxWin macros
  52 // ----------------------------------------------------------------------------
  53
  54 // ----------------------------------------------------------------------------
  55 // wxDialogModalData
  56 // ----------------------------------------------------------------------------
  57
  58 // this is simply a container for any data we need to implement modality which
  59 // allows us to avoid changing wxDialog each time the implementation changes
  60 class wxDialogModalData
  61 {
  62 public:
  63     wxDialogModalData(wxDialog *dialog) : m_evtLoop(dialog) { }
  64
  65     void RunLoop()
  66     {
  67         m_evtLoop.Run();
  68     }
  69
  70     void ExitLoop()
  71     {
  72         m_evtLoop.Exit();
  73     }
  74
  75 private:
  76     wxModalEventLoop m_evtLoop;
  77 };
  78
  79 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxDialogModalData)
  80
  81 // ============================================================================
  82 // implementation
  83 // ============================================================================
  84
  85 // ----------------------------------------------------------------------------
  86 // wxDialog construction
  87 // ----------------------------------------------------------------------------
  88
  89 void wxDialog::Init()
  90 {
  91     m_isShown = false;
  92     m_modalData = NULL;
  93 #if wxUSE_TOOLBAR && defined(__POCKETPC__)
  94     m_dialogToolBar = NULL;
  95 #endif
  96 #if wxUSE_DIALOG_SIZEGRIP
  97     m_hGripper = 0;
  98 #endif // wxUSE_DIALOG_SIZEGRIP
  99 }
 100
 101 bool wxDialog::Create(wxWindow *parent,
 102                       wxWindowID id,
 103                       const wxString& title,
 104                       const wxPoint& pos,
 105                       const wxSize& size,
 106                       long style,
 107                       const wxString& name)
 108 {
 109     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
 110
 111     // All dialogs should really have this style
 112     style |= wxTAB_TRAVERSAL;
 113
 114     if ( !wxTopLevelWindow::Create(parent, id, title, pos, size, style, name) )
 115         return false;
 116
 117     if ( !m_hasFont )
 118         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 119
 120 #if defined(__SMARTPHONE__) && defined(__WXWINCE__)
 121     SetLeftMenu(wxID_OK, _("OK"));
 122 #endif
 123 #if wxUSE_TOOLBAR && defined(__POCKETPC__)
 124     CreateToolBar();
 125 #endif
 126
 127 #if wxUSE_DIALOG_SIZEGRIP
 128     if ( HasFlag(wxRESIZE_BORDER) )
 129     {
 130         CreateGripper();
 131
 132         Connect(wxEVT_CREATE,
 133                 wxWindowCreateEventHandler(wxDialog::OnWindowCreate));
 134     }
 135 #endif // wxUSE_DIALOG_SIZEGRIP
 136
 137     return true;
 138 }
 139
 140 wxDialog::~wxDialog()
 141 {
 142     // this will also reenable all the other windows for a modal dialog
 143     Show(false);
 144
 145 #if wxUSE_DIALOG_SIZEGRIP
 146     DestroyGripper();
 147 #endif // wxUSE_DIALOG_SIZEGRIP
 148 }
 149
 150 // ----------------------------------------------------------------------------
 151 // showing the dialogs
 152 // ----------------------------------------------------------------------------
 153
 154 bool wxDialog::Show(bool show)
 155 {
 156     if ( show == IsShown() )
 157         return false;
 158
 159     if ( !show && m_modalData )
 160     {
 161         // we need to do this before calling wxDialogBase version because if we
 162         // had disabled other app windows, they must be reenabled right now as
 163         // if they stay disabled Windows will activate another window (one
 164         // which is enabled, anyhow) when we're hidden in the base class Show()
 165         // and we will lose activation
 166         m_modalData->ExitLoop();
 167     }
 168
 169     if ( show )
 170     {
 171         if (CanDoLayoutAdaptation())
 172             DoLayoutAdaptation();
 173
 174         // this usually will result in TransferDataToWindow() being called
 175         // which will change the controls values so do it before showing as
 176         // otherwise we could have some flicker
 177         InitDialog();
 178     }
 179
 180     wxDialogBase::Show(show);
 181
 182     if ( show )
 183     {
 184         // dialogs don't get WM_SIZE message from ::ShowWindow() for some
 185         // reason so generate it ourselves for consistency with frames and
 186         // dialogs in other ports
 187         //
 188         // NB: normally we should call it just the first time but doing it
 189         //     every time is simpler than keeping a flag
 190         const wxSize size = GetClientSize();
 191         ::SendMessage(GetHwnd(), WM_SIZE,
 192                       SIZE_RESTORED, MAKELPARAM(size.x, size.y));
 193     }
 194
 195     return true;
 196 }
 197
 198 // show dialog modally
 199 int wxDialog::ShowModal()
 200 {
 201     WX_HOOK_MODAL_DIALOG();
 202
 203     wxASSERT_MSG( !IsModal(), wxT("ShowModal() can't be called twice") );
 204
 205     Show();
 206
 207     // EndModal may have been called from InitDialog handler (called from
 208     // inside Show()) and hidden the dialog back again
 209     if ( IsShown() )
 210     {
 211         // enter and run the modal loop
 212         wxDialogModalDataTiedPtr modalData(&m_modalData,
 213                                            new wxDialogModalData(this));
 214         modalData->RunLoop();
 215     }
 216
 217     return GetReturnCode();
 218 }
 219
 220 void wxDialog::EndModal(int retCode)
 221 {
 222     wxASSERT_MSG( IsModal(), wxT("EndModal() called for non modal dialog") );
 223
 224     SetReturnCode(retCode);
 225
 226     Hide();
 227 }
 228
 229 // ----------------------------------------------------------------------------
 230 // wxDialog gripper handling
 231 // ----------------------------------------------------------------------------
 232
 233 #if wxUSE_DIALOG_SIZEGRIP
 234
 235 void wxDialog::SetWindowStyleFlag(long style)
 236 {
 237     wxDialogBase::SetWindowStyleFlag(style);
 238
 239     if ( HasFlag(wxRESIZE_BORDER) )
 240         CreateGripper();
 241     else
 242         DestroyGripper();
 243 }
 244
 245 void wxDialog::CreateGripper()
 246 {
 247     if ( !m_hGripper )
 248     {
 249         // just create it here, it will be positioned and shown later
 250         m_hGripper = (WXHWND)::CreateWindow
 251                                (
 252                                     wxT("SCROLLBAR"),
 253                                     wxT(""),
 254                                     WS_CHILD |
 255                                     WS_CLIPSIBLINGS |
 256                                     SBS_SIZEGRIP |
 257                                     SBS_SIZEBOX |
 258                                     SBS_SIZEBOXBOTTOMRIGHTALIGN,
 259                                     0, 0, 0, 0,
 260                                     GetHwnd(),
 261                                     0,
 262                                     wxGetInstance(),
 263                                     NULL
 264                                );
 265     }
 266 }
 267
 268 void wxDialog::DestroyGripper()
 269 {
 270     if ( m_hGripper )
 271     {
 272         // we used to have trouble with gripper appearing on top (and hence
 273         // overdrawing) the other, real, dialog children -- check that this
 274         // isn't the case automatically (but notice that this could be false if
 275         // we're not shown at all as in this case ResizeGripper() might not
 276         // have been called yet)
 277         wxASSERT_MSG( !IsShown() ||
 278                       ::GetWindow((HWND)m_hGripper, GW_HWNDNEXT) == 0,
 279             wxT("Bug in wxWidgets: gripper should be at the bottom of Z-order") );
 280         ::DestroyWindow((HWND) m_hGripper);
 281         m_hGripper = 0;
 282     }
 283 }
 284
 285 void wxDialog::ShowGripper(bool show)
 286 {
 287     wxASSERT_MSG( m_hGripper, wxT("shouldn't be called if we have no gripper") );
 288
 289     if ( show )
 290         ResizeGripper();
 291
 292     ::ShowWindow((HWND)m_hGripper, show ? SW_SHOW : SW_HIDE);
 293 }
 294
 295 void wxDialog::ResizeGripper()
 296 {
 297     wxASSERT_MSG( m_hGripper, wxT("shouldn't be called if we have no gripper") );
 298
 299     HWND hwndGripper = (HWND)m_hGripper;
 300
 301     const wxRect rectGripper = wxRectFromRECT(wxGetWindowRect(hwndGripper));
 302     const wxSize size = GetClientSize() - rectGripper.GetSize();
 303
 304     ::SetWindowPos(hwndGripper, HWND_BOTTOM,
 305                    size.x, size.y,
 306                    rectGripper.width, rectGripper.height,
 307                    SWP_NOACTIVATE);
 308 }
 309
 310 void wxDialog::OnWindowCreate(wxWindowCreateEvent& event)
 311 {
 312     if ( m_hGripper && IsShown() &&
 313             event.GetWindow() && event.GetWindow()->GetParent() == this )
 314     {
 315         // Put gripper below the newly created child window
 316         ::SetWindowPos((HWND)m_hGripper, HWND_BOTTOM, 0, 0, 0, 0,
 317                        SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE);
 318     }
 319
 320     event.Skip();
 321 }
 322
 323 #endif // wxUSE_DIALOG_SIZEGRIP
 324
 325 // ----------------------------------------------------------------------------
 326 // wxWin event handlers
 327 // ----------------------------------------------------------------------------
 328
 329 #ifdef __POCKETPC__
 330 // Responds to the OK button in a PocketPC titlebar. This
 331 // can be overridden, or you can change the id used for
 332 // sending the event, by calling SetAffirmativeId.
 333 bool wxDialog::DoOK()
 334 {
 335     const int idOk = GetAffirmativeId();
 336     if ( EmulateButtonClickIfPresent(idOk) )
 337         return true;
 338
 339     wxCommandEvent event(wxEVT_BUTTON, GetAffirmativeId());
 340     event.SetEventObject(this);
 341
 342     return HandleWindowEvent(event);
 343 }
 344 #endif // __POCKETPC__
 345
 346 #if wxUSE_TOOLBAR && defined(__POCKETPC__)
 347 // create main toolbar by calling OnCreateToolBar()
 348 wxToolBar* wxDialog::CreateToolBar(long style, wxWindowID winid, const wxString& name)
 349 {
 350     m_dialogToolBar = OnCreateToolBar(style, winid, name);
 351
 352     return m_dialogToolBar;
 353 }
 354
 355 // return a new toolbar
 356 wxToolBar *wxDialog::OnCreateToolBar(long style,
 357                                        wxWindowID winid,
 358                                        const wxString& name)
 359 {
 360     return new wxToolMenuBar(this, winid,
 361                          wxDefaultPosition, wxDefaultSize,
 362                          style, name);
 363 }
 364 #endif
 365
 366 // ---------------------------------------------------------------------------
 367 // dialog Windows messages processing
 368 // ---------------------------------------------------------------------------
 369
 370 WXLRESULT wxDialog::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 371 {
 372     WXLRESULT rc = 0;
 373     bool processed = false;
 374
 375     switch ( message )
 376     {
 377 #ifdef __WXWINCE__
 378         // react to pressing the OK button in the title
 379         case WM_COMMAND:
 380         {
 381             switch ( LOWORD(wParam) )
 382             {
 383 #ifdef __POCKETPC__
 384                 case IDOK:
 385                     processed = DoOK();
 386                     if (!processed)
 387                         processed = !Close();
 388 #endif
 389 #ifdef __SMARTPHONE__
 390                 case IDM_LEFT:
 391                 case IDM_RIGHT:
 392                     processed = HandleCommand( LOWORD(wParam) , 0 , NULL );
 393                     break;
 394 #endif // __SMARTPHONE__
 395             }
 396             break;
 397         }
 398 #endif
 399         case WM_CLOSE:
 400             // if we can't close, tell the system that we processed the
 401             // message - otherwise it would close us
 402             processed = !Close();
 403             break;
 404
 405         case WM_SIZE:
 406 #if wxUSE_DIALOG_SIZEGRIP
 407             if ( m_hGripper )
 408             {
 409                 switch ( wParam )
 410                 {
 411                     case SIZE_MAXIMIZED:
 412                         ShowGripper(false);
 413                         break;
 414
 415                     case SIZE_RESTORED:
 416                         ShowGripper(true);
 417                 }
 418             }
 419 #endif // wxUSE_DIALOG_SIZEGRIP
 420
 421             // the Windows dialogs unfortunately are not meant to be resizable
 422             // at all and their standard class doesn't include CS_[VH]REDRAW
 423             // styles which means that the window is not refreshed properly
 424             // after the resize and no amount of WS_CLIPCHILDREN/SIBLINGS can
 425             // help with it - so we have to refresh it manually which certainly
 426             // creates flicker but at least doesn't show garbage on the screen
 427             rc = wxWindow::MSWWindowProc(message, wParam, lParam);
 428             processed = true;
 429             if ( HasFlag(wxFULL_REPAINT_ON_RESIZE) )
 430             {
 431                 ::InvalidateRect(GetHwnd(), NULL, false /* erase bg */);
 432             }
 433             break;
 434
 435 #ifndef __WXMICROWIN__
 436         case WM_SETCURSOR:
 437             // we want to override the busy cursor for modal dialogs:
 438             // typically, wxBeginBusyCursor() is called and then a modal dialog
 439             // is shown, but the modal dialog shouldn't have hourglass cursor
 440             if ( IsModal() && wxIsBusy() )
 441             {
 442                 // set our cursor for all windows (but see below)
 443                 wxCursor cursor = m_cursor;
 444                 if ( !cursor.IsOk() )
 445                     cursor = wxCURSOR_ARROW;
 446
 447                 ::SetCursor(GetHcursorOf(cursor));
 448
 449                 // in any case, stop here and don't let wxWindow process this
 450                 // message (it would set the busy cursor)
 451                 processed = true;
 452
 453                 // but return false to tell the child window (if the event
 454                 // comes from one of them and not from ourselves) that it can
 455                 // set its own cursor if it has one: thus, standard controls
 456                 // (e.g. text ctrl) still have correct cursors in a dialog
 457                 // invoked while wxIsBusy()
 458                 rc = false;
 459             }
 460             break;
 461 #endif // __WXMICROWIN__
 462     }
 463
 464     if ( !processed )
 465         rc = wxDialogBase::MSWWindowProc(message, wParam, lParam);
 466
 467     return rc;
 468 }