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/scopedptr.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 // ----------------------------------------------------------------------------
  54 // wxDialogModalData
  55 // ----------------------------------------------------------------------------
  56
  57 // this is simply a container for any data we need to implement modality which
  58 // allows us to avoid changing wxDialog each time the implementation changes
  59 class wxDialogModalData
  60 {
  61 public:
  62     wxDialogModalData(wxDialog *dialog) : m_evtLoop(dialog) { }
  63
  64     void RunLoop()
  65     {
  66         m_evtLoop.Run();
  67     }
  68
  69     void ExitLoop()
  70     {
  71         m_evtLoop.Exit();
  72     }
  73
  74 private:
  75     wxModalEventLoop m_evtLoop;
  76 };
  77
  78 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxDialogModalData)
  79
  80 // ============================================================================
  81 // implementation
  82 // ============================================================================
  83
  84 // ----------------------------------------------------------------------------
  85 // wxDialog construction
  86 // ----------------------------------------------------------------------------
  87
  88 void wxDialog::Init()
  89 {
  90     m_isShown = false;
  91     m_modalData = NULL;
  92 #if wxUSE_TOOLBAR && defined(__POCKETPC__)
  93     m_dialogToolBar = NULL;
  94 #endif
  95 #if wxUSE_DIALOG_SIZEGRIP
  96     m_hGripper = 0;
  97 #endif // wxUSE_DIALOG_SIZEGRIP
  98 }
  99
 100 bool wxDialog::Create(wxWindow *parent,
 101                       wxWindowID id,
 102                       const wxString& title,
 103                       const wxPoint& pos,
 104                       const wxSize& size,
 105                       long style,
 106                       const wxString& name)
 107 {
 108     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
 109
 110     // All dialogs should really have this style
 111     style |= wxTAB_TRAVERSAL;
 112
 113     if ( !wxTopLevelWindow::Create(parent, id, title, pos, size, style, name) )
 114         return false;
 115
 116     if ( !m_hasFont )
 117         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 118
 119 #if defined(__SMARTPHONE__) && defined(__WXWINCE__)
 120     SetLeftMenu(wxID_OK, _("OK"));
 121 #endif
 122 #if wxUSE_TOOLBAR && defined(__POCKETPC__)
 123     CreateToolBar();
 124 #endif
 125
 126 #if wxUSE_DIALOG_SIZEGRIP
 127     if ( HasFlag(wxRESIZE_BORDER) )
 128     {
 129         CreateGripper();
 130
 131         Connect(wxEVT_CREATE,
 132                 wxWindowCreateEventHandler(wxDialog::OnWindowCreate));
 133     }
 134 #endif // wxUSE_DIALOG_SIZEGRIP
 135
 136     return true;
 137 }
 138
 139 wxDialog::~wxDialog()
 140 {
 141     // this will also reenable all the other windows for a modal dialog
 142     Show(false);
 143
 144 #if wxUSE_DIALOG_SIZEGRIP
 145     DestroyGripper();
 146 #endif // wxUSE_DIALOG_SIZEGRIP
 147 }
 148
 149 // ----------------------------------------------------------------------------
 150 // showing the dialogs
 151 // ----------------------------------------------------------------------------
 152
 153 bool wxDialog::Show(bool show)
 154 {
 155     if ( show == IsShown() )
 156         return false;
 157
 158     if ( !show && m_modalData )
 159     {
 160         // we need to do this before calling wxDialogBase version because if we
 161         // had disabled other app windows, they must be reenabled right now as
 162         // if they stay disabled Windows will activate another window (one
 163         // which is enabled, anyhow) when we're hidden in the base class Show()
 164         // and we will lose activation
 165         m_modalData->ExitLoop();
 166     }
 167
 168     if ( show )
 169     {
 170         if (CanDoLayoutAdaptation())
 171             DoLayoutAdaptation();
 172
 173         // this usually will result in TransferDataToWindow() being called
 174         // which will change the controls values so do it before showing as
 175         // otherwise we could have some flicker
 176         InitDialog();
 177     }
 178
 179     wxDialogBase::Show(show);
 180
 181     if ( show )
 182     {
 183         // dialogs don't get WM_SIZE message from ::ShowWindow() for some
 184         // reason so generate it ourselves for consistency with frames and
 185         // dialogs in other ports
 186         //
 187         // NB: normally we should call it just the first time but doing it
 188         //     every time is simpler than keeping a flag
 189         const wxSize size = GetClientSize();
 190         ::SendMessage(GetHwnd(), WM_SIZE,
 191                       SIZE_RESTORED, MAKELPARAM(size.x, size.y));
 192     }
 193
 194     return true;
 195 }
 196
 197 void wxDialog::Raise()
 198 {
 199     ::SetForegroundWindow(GetHwnd());
 200 }
 201
 202 // show dialog modally
 203 int wxDialog::ShowModal()
 204 {
 205     wxASSERT_MSG( !IsModal(), wxT("ShowModal() can't be called twice") );
 206
 207     Show();
 208
 209     // EndModal may have been called from InitDialog handler (called from
 210     // inside Show()) and hidden the dialog back again
 211     if ( IsShown() )
 212     {
 213         // enter and run the modal loop
 214         wxDialogModalDataTiedPtr modalData(&m_modalData,
 215                                            new wxDialogModalData(this));
 216         modalData->RunLoop();
 217     }
 218
 219     return GetReturnCode();
 220 }
 221
 222 void wxDialog::EndModal(int retCode)
 223 {
 224     wxASSERT_MSG( IsModal(), wxT("EndModal() called for non modal dialog") );
 225
 226     SetReturnCode(retCode);
 227
 228     Hide();
 229 }
 230
 231 // ----------------------------------------------------------------------------
 232 // wxDialog gripper handling
 233 // ----------------------------------------------------------------------------
 234
 235 #if wxUSE_DIALOG_SIZEGRIP
 236
 237 void wxDialog::SetWindowStyleFlag(long style)
 238 {
 239     wxDialogBase::SetWindowStyleFlag(style);
 240
 241     if ( HasFlag(wxRESIZE_BORDER) )
 242         CreateGripper();
 243     else
 244         DestroyGripper();
 245 }
 246
 247 void wxDialog::CreateGripper()
 248 {
 249     if ( !m_hGripper )
 250     {
 251         // just create it here, it will be positioned and shown later
 252         m_hGripper = (WXHWND)::CreateWindow
 253                                (
 254                                     wxT("SCROLLBAR"),
 255                                     wxT(""),
 256                                     WS_CHILD |
 257                                     WS_CLIPSIBLINGS |
 258                                     SBS_SIZEGRIP |
 259                                     SBS_SIZEBOX |
 260                                     SBS_SIZEBOXBOTTOMRIGHTALIGN,
 261                                     0, 0, 0, 0,
 262                                     GetHwnd(),
 263                                     0,
 264                                     wxGetInstance(),
 265                                     NULL
 266                                );
 267     }
 268 }
 269
 270 void wxDialog::DestroyGripper()
 271 {
 272     if ( m_hGripper )
 273     {
 274         // we used to have trouble with gripper appearing on top (and hence
 275         // overdrawing) the other, real, dialog children -- check that this
 276         // isn't the case automatically (but notice that this could be false if
 277         // we're not shown at all as in this case ResizeGripper() might not
 278         // have been called yet)
 279         wxASSERT_MSG( !IsShown() ||
 280                       ::GetWindow((HWND)m_hGripper, GW_HWNDNEXT) == 0,
 281             wxT("Bug in wxWidgets: gripper should be at the bottom of Z-order") );
 282         ::DestroyWindow((HWND) m_hGripper);
 283         m_hGripper = 0;
 284     }
 285 }
 286
 287 void wxDialog::ShowGripper(bool show)
 288 {
 289     wxASSERT_MSG( m_hGripper, wxT("shouldn't be called if we have no gripper") );
 290
 291     if ( show )
 292         ResizeGripper();
 293
 294     ::ShowWindow((HWND)m_hGripper, show ? SW_SHOW : SW_HIDE);
 295 }
 296
 297 void wxDialog::ResizeGripper()
 298 {
 299     wxASSERT_MSG( m_hGripper, wxT("shouldn't be called if we have no gripper") );
 300
 301     HWND hwndGripper = (HWND)m_hGripper;
 302
 303     const wxRect rectGripper = wxRectFromRECT(wxGetWindowRect(hwndGripper));
 304     const wxSize size = GetClientSize() - rectGripper.GetSize();
 305
 306     ::SetWindowPos(hwndGripper, HWND_BOTTOM,
 307                    size.x, size.y,
 308                    rectGripper.width, rectGripper.height,
 309                    SWP_NOACTIVATE);
 310 }
 311
 312 void wxDialog::OnWindowCreate(wxWindowCreateEvent& event)
 313 {
 314     if ( m_hGripper && IsShown() &&
 315             event.GetWindow() && event.GetWindow()->GetParent() == this )
 316     {
 317         // Put gripper below the newly created child window
 318         ::SetWindowPos((HWND)m_hGripper, HWND_BOTTOM, 0, 0, 0, 0,
 319                        SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE);
 320     }
 321
 322     event.Skip();
 323 }
 324
 325 #endif // wxUSE_DIALOG_SIZEGRIP
 326
 327 // ----------------------------------------------------------------------------
 328 // wxWin event handlers
 329 // ----------------------------------------------------------------------------
 330
 331 #ifdef __POCKETPC__
 332 // Responds to the OK button in a PocketPC titlebar. This
 333 // can be overridden, or you can change the id used for
 334 // sending the event, by calling SetAffirmativeId.
 335 bool wxDialog::DoOK()
 336 {
 337     const int idOk = GetAffirmativeId();
 338     if ( EmulateButtonClickIfPresent(idOk) )
 339         return true;
 340
 341     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, GetAffirmativeId());
 342     event.SetEventObject(this);
 343
 344     return HandleWindowEvent(event);
 345 }
 346 #endif // __POCKETPC__
 347
 348 #if wxUSE_TOOLBAR && defined(__POCKETPC__)
 349 // create main toolbar by calling OnCreateToolBar()
 350 wxToolBar* wxDialog::CreateToolBar(long style, wxWindowID winid, const wxString& name)
 351 {
 352     m_dialogToolBar = OnCreateToolBar(style, winid, name);
 353
 354     return m_dialogToolBar;
 355 }
 356
 357 // return a new toolbar
 358 wxToolBar *wxDialog::OnCreateToolBar(long style,
 359                                        wxWindowID winid,
 360                                        const wxString& name)
 361 {
 362     return new wxToolMenuBar(this, winid,
 363                          wxDefaultPosition, wxDefaultSize,
 364                          style, name);
 365 }
 366 #endif
 367
 368 // ---------------------------------------------------------------------------
 369 // dialog Windows messages processing
 370 // ---------------------------------------------------------------------------
 371
 372 WXLRESULT wxDialog::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 373 {
 374     WXLRESULT rc = 0;
 375     bool processed = false;
 376
 377     switch ( message )
 378     {
 379 #ifdef __WXWINCE__
 380         // react to pressing the OK button in the title
 381         case WM_COMMAND:
 382         {
 383             switch ( LOWORD(wParam) )
 384             {
 385 #ifdef __POCKETPC__
 386                 case IDOK:
 387                     processed = DoOK();
 388                     if (!processed)
 389                         processed = !Close();
 390 #endif
 391 #ifdef __SMARTPHONE__
 392                 case IDM_LEFT:
 393                 case IDM_RIGHT:
 394                     processed = HandleCommand( LOWORD(wParam) , 0 , NULL );
 395                     break;
 396 #endif // __SMARTPHONE__
 397             }
 398             break;
 399         }
 400 #endif
 401         case WM_CLOSE:
 402             // if we can't close, tell the system that we processed the
 403             // message - otherwise it would close us
 404             processed = !Close();
 405             break;
 406
 407         case WM_SIZE:
 408 #if wxUSE_DIALOG_SIZEGRIP
 409             if ( m_hGripper )
 410             {
 411                 switch ( wParam )
 412                 {
 413                     case SIZE_MAXIMIZED:
 414                         ShowGripper(false);
 415                         break;
 416
 417                     case SIZE_RESTORED:
 418                         ShowGripper(true);
 419                 }
 420             }
 421 #endif // wxUSE_DIALOG_SIZEGRIP
 422
 423             // the Windows dialogs unfortunately are not meant to be resizable
 424             // at all and their standard class doesn't include CS_[VH]REDRAW
 425             // styles which means that the window is not refreshed properly
 426             // after the resize and no amount of WS_CLIPCHILDREN/SIBLINGS can
 427             // help with it - so we have to refresh it manually which certainly
 428             // creates flicker but at least doesn't show garbage on the screen
 429             rc = wxWindow::MSWWindowProc(message, wParam, lParam);
 430             processed = true;
 431             if ( HasFlag(wxFULL_REPAINT_ON_RESIZE) )
 432             {
 433                 ::InvalidateRect(GetHwnd(), NULL, false /* erase bg */);
 434             }
 435             break;
 436
 437 #ifndef __WXMICROWIN__
 438         case WM_SETCURSOR:
 439             // we want to override the busy cursor for modal dialogs:
 440             // typically, wxBeginBusyCursor() is called and then a modal dialog
 441             // is shown, but the modal dialog shouldn't have hourglass cursor
 442             if ( IsModal() && wxIsBusy() )
 443             {
 444                 // set our cursor for all windows (but see below)
 445                 wxCursor cursor = m_cursor;
 446                 if ( !cursor.IsOk() )
 447                     cursor = wxCURSOR_ARROW;
 448
 449                 ::SetCursor(GetHcursorOf(cursor));
 450
 451                 // in any case, stop here and don't let wxWindow process this
 452                 // message (it would set the busy cursor)
 453                 processed = true;
 454
 455                 // but return false to tell the child window (if the event
 456                 // comes from one of them and not from ourselves) that it can
 457                 // set its own cursor if it has one: thus, standard controls
 458                 // (e.g. text ctrl) still have correct cursors in a dialog
 459                 // invoked while wxIsBusy()
 460                 rc = false;
 461             }
 462             break;
 463 #endif // __WXMICROWIN__
 464     }
 465
 466     if ( !processed )
 467         rc = wxWindow::MSWWindowProc(message, wParam, lParam);
 468
 469     return rc;
 470 }