src/generic/progdlgg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/progdlgg.cpp
   3 // Purpose:     wxProgressDialog class
   4 // Author:      Karsten Ballüder
   5 // Modified by:
   6 // Created:     09.05.1999
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Karsten Ballüder
   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 #if wxUSE_PROGRESSDLG
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/utils.h"
  31     #include "wx/frame.h"
  32     #include "wx/button.h"
  33     #include "wx/stattext.h"
  34     #include "wx/sizer.h"
  35     #include "wx/event.h"
  36     #include "wx/gauge.h"
  37     #include "wx/intl.h"
  38     #include "wx/dcclient.h"
  39     #include "wx/timer.h"
  40     #include "wx/settings.h"
  41 #endif
  42
  43 #include "wx/progdlg.h"
  44
  45 // ---------------------------------------------------------------------------
  46 // macros
  47 // ---------------------------------------------------------------------------
  48
  49 /* Macro for avoiding #ifdefs when value have to be different depending on size of
  50    device we display on - take it from something like wxDesktopPolicy in the future
  51  */
  52
  53 #if defined(__SMARTPHONE__)
  54     #define wxLARGESMALL(large,small) small
  55 #else
  56     #define wxLARGESMALL(large,small) large
  57 #endif
  58
  59 // ----------------------------------------------------------------------------
  60 // constants
  61 // ----------------------------------------------------------------------------
  62
  63 #define LAYOUT_MARGIN wxLARGESMALL(8,2)
  64
  65 static const int wxID_SKIP = 32000;  // whatever
  66
  67 // ----------------------------------------------------------------------------
  68 // private functions
  69 // ----------------------------------------------------------------------------
  70
  71 // update the label to show the given time (in seconds)
  72 static void SetTimeLabel(unsigned long val, wxStaticText *label);
  73
  74 // ----------------------------------------------------------------------------
  75 // event tables
  76 // ----------------------------------------------------------------------------
  77
  78 BEGIN_EVENT_TABLE(wxProgressDialog, wxDialog)
  79     EVT_BUTTON(wxID_CANCEL, wxProgressDialog::OnCancel)
  80     EVT_BUTTON(wxID_SKIP, wxProgressDialog::OnSkip)
  81
  82     EVT_CLOSE(wxProgressDialog::OnClose)
  83 END_EVENT_TABLE()
  84
  85 IMPLEMENT_CLASS(wxProgressDialog, wxDialog)
  86
  87 // ============================================================================
  88 // wxProgressDialog implementation
  89 // ============================================================================
  90
  91 // ----------------------------------------------------------------------------
  92 // wxProgressDialog creation
  93 // ----------------------------------------------------------------------------
  94
  95 wxProgressDialog::wxProgressDialog(wxString const &title,
  96                                    wxString const &message,
  97                                    int maximum,
  98                                    wxWindow *parent,
  99                                    int style)
 100                 : wxDialog(parent, wxID_ANY, title),
 101                   m_skip(false),
 102                   m_delay(3),
 103                   m_hasAbortButton(false),
 104                   m_hasSkipButton(false)
 105 {
 106     // we may disappear at any moment, let the others know about it
 107     SetExtraStyle(GetExtraStyle() | wxWS_EX_TRANSIENT);
 108     m_windowStyle |= style;
 109
 110     m_hasAbortButton = (style & wxPD_CAN_ABORT) != 0;
 111     m_hasSkipButton = (style & wxPD_CAN_SKIP) != 0;
 112
 113     bool isPda = (wxSystemSettings::GetScreenType() <= wxSYS_SCREEN_PDA);
 114
 115 #if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
 116     // we have to remove the "Close" button from the title bar then as it is
 117     // confusing to have it - it doesn't work anyhow
 118     //
 119     // FIXME: should probably have a (extended?) window style for this
 120     if ( !m_hasAbortButton )
 121     {
 122         EnableCloseButton(false);
 123     }
 124 #endif // wxMSW
 125
 126 #if defined(__SMARTPHONE__)
 127     SetLeftMenu();
 128 #endif
 129
 130     m_state = m_hasAbortButton ? Continue : Uncancelable;
 131     m_maximum = maximum;
 132
 133 #if defined(__WXMSW__) || defined(__WXPM__)
 134     // we can't have values > 65,536 in the progress control under Windows, so
 135     // scale everything down
 136     m_factor = m_maximum / 65536 + 1;
 137     m_maximum /= m_factor;
 138 #endif // __WXMSW__
 139
 140     m_parentTop = wxGetTopLevelParent(parent);
 141
 142     wxClientDC dc(this);
 143     dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 144     long widthText = 0;
 145     dc.GetTextExtent(message, &widthText, NULL, NULL, NULL, NULL);
 146
 147     wxBoxSizer *sizer = new wxBoxSizer(wxVERTICAL);
 148
 149     m_msg = new wxStaticText(this, wxID_ANY, message);
 150     sizer->Add(m_msg, 0, wxLEFT | wxTOP, 2*LAYOUT_MARGIN);
 151
 152     wxSize sizeDlg,
 153            sizeLabel = m_msg->GetSize();
 154     sizeDlg.y = 2*LAYOUT_MARGIN + sizeLabel.y;
 155
 156     if ( maximum > 0 )
 157     {
 158         int gauge_style = wxGA_HORIZONTAL;
 159         if ( ( style & wxPD_SMOOTH ) == wxPD_SMOOTH )
 160             gauge_style |= wxGA_SMOOTH;
 161         m_gauge = new wxGauge(this, wxID_ANY, m_maximum,
 162                               wxDefaultPosition, wxDefaultSize,
 163                               gauge_style );
 164
 165         sizer->Add(m_gauge, 0, wxLEFT | wxRIGHT | wxTOP | wxEXPAND, 2*LAYOUT_MARGIN);
 166         m_gauge->SetValue(0);
 167
 168         wxSize sizeGauge = m_gauge->GetSize();
 169         sizeDlg.y += 2*LAYOUT_MARGIN + sizeGauge.y;
 170     }
 171     else
 172         m_gauge = (wxGauge *)NULL;
 173
 174     // create the estimated/remaining/total time zones if requested
 175     m_elapsed = m_estimated = m_remaining = (wxStaticText*)NULL;
 176     m_display_estimated = m_last_timeupdate = m_break = 0;
 177     m_ctdelay = 0;
 178
 179     // if we are going to have at least one label, remmeber it in this var
 180     wxStaticText *label = NULL;
 181
 182     // also count how many labels we really have
 183     size_t nTimeLabels = 0;
 184
 185     if ( style & wxPD_ELAPSED_TIME )
 186     {
 187         nTimeLabels++;
 188
 189         label =
 190         m_elapsed = CreateLabel(_("Elapsed time : "), sizer);
 191     }
 192
 193     if ( style & wxPD_ESTIMATED_TIME )
 194     {
 195         nTimeLabels++;
 196
 197         label =
 198         m_estimated = CreateLabel(_("Estimated time : "), sizer);
 199     }
 200
 201     if ( style & wxPD_REMAINING_TIME )
 202     {
 203         nTimeLabels++;
 204
 205         label =
 206         m_remaining = CreateLabel(_("Remaining time : "), sizer);
 207     }
 208
 209     if ( nTimeLabels > 0 )
 210     {
 211         // set it to the current time
 212         m_timeStart = wxGetCurrentTime();
 213         sizeDlg.y += nTimeLabels * (label->GetSize().y + LAYOUT_MARGIN);
 214     }
 215
 216 #if defined(__SMARTPHONE__)
 217     if ( m_hasSkipButton )
 218         SetRightMenu(wxID_SKIP, _("Skip"));
 219     if ( m_hasAbortButton )
 220         SetLeftMenu(wxID_CANCEL);
 221 #else
 222     m_btnAbort = m_btnSkip = (wxButton *)NULL;
 223     bool sizeDlgModified = false;
 224     wxBoxSizer *buttonSizer = new wxBoxSizer(wxHORIZONTAL);
 225
 226     const int sizerFlags =
 227 #if defined(__WXMSW__) || defined(__WXPM__)
 228                            wxALIGN_RIGHT | wxALL
 229 #else // !MSW
 230                            wxALIGN_CENTER_HORIZONTAL | wxBOTTOM | wxTOP
 231 #endif // MSW/!MSW
 232                            ;
 233
 234     if ( m_hasSkipButton )
 235     {
 236         m_btnSkip = new wxButton(this, wxID_SKIP, _("Skip"));
 237
 238         // Windows dialogs usually have buttons in the lower right corner
 239         buttonSizer->Add(m_btnSkip, 0, sizerFlags, LAYOUT_MARGIN);
 240         sizeDlg.y += 2*LAYOUT_MARGIN + wxButton::GetDefaultSize().y;
 241         sizeDlgModified = true;
 242     }
 243
 244     if ( m_hasAbortButton )
 245     {
 246         m_btnAbort = new wxButton(this, wxID_CANCEL);
 247
 248         // Windows dialogs usually have buttons in the lower right corner
 249         buttonSizer->Add(m_btnAbort, 0, sizerFlags, LAYOUT_MARGIN);
 250         if(!sizeDlgModified)
 251             sizeDlg.y += 2*LAYOUT_MARGIN + wxButton::GetDefaultSize().y;
 252     }
 253
 254     sizer->Add(buttonSizer, 0, sizerFlags, LAYOUT_MARGIN );
 255 #endif // __SMARTPHONE__/!__SMARTPHONE__
 256
 257     SetSizerAndFit(sizer);
 258
 259     if (!isPda)
 260     {
 261         sizeDlg.y += 2*LAYOUT_MARGIN;
 262
 263         // try to make the dialog not square but rectangular of reasonable width
 264         sizeDlg.x = (wxCoord)wxMax(widthText, 4*sizeDlg.y/3);
 265         sizeDlg.x *= 3;
 266         sizeDlg.x /= 2;
 267         SetClientSize(sizeDlg);
 268     }
 269
 270     Centre(wxCENTER_FRAME | wxBOTH);
 271
 272     if ( style & wxPD_APP_MODAL )
 273     {
 274         m_winDisabler = new wxWindowDisabler(this);
 275     }
 276     else
 277     {
 278         if ( m_parentTop )
 279             m_parentTop->Disable();
 280         m_winDisabler = NULL;
 281     }
 282
 283     Show();
 284     Enable();
 285
 286     // this one can be initialized even if the others are unknown for now
 287     //
 288     // NB: do it after calling Layout() to keep the labels correctly aligned
 289     if ( m_elapsed )
 290     {
 291         SetTimeLabel(0, m_elapsed);
 292     }
 293
 294     Update();
 295 }
 296
 297 wxStaticText *wxProgressDialog::CreateLabel(const wxString& text,
 298                                             wxSizer *sizer)
 299 {
 300     wxBoxSizer *locsizer = new wxBoxSizer(wxLARGESMALL(wxHORIZONTAL,wxVERTICAL));
 301
 302     wxStaticText *dummy = new wxStaticText(this, wxID_ANY, text);
 303     wxStaticText *label = new wxStaticText(this, wxID_ANY, _("unknown"));
 304
 305     // select placement most native or nice on target GUI
 306 #if defined(__SMARTPHONE__)
 307     // label and time to the left in two rows
 308     locsizer->Add(dummy, 1, wxALIGN_LEFT);
 309     locsizer->Add(label, 1, wxALIGN_LEFT);
 310     sizer->Add(locsizer, 0, wxALIGN_LEFT | wxTOP | wxLEFT, LAYOUT_MARGIN);
 311 #elif defined(__WXMSW__) || defined(__WXPM__) || defined(__WXMAC__) || defined(__WXGTK20__)
 312     // label and time centered in one row
 313     locsizer->Add(dummy, 1, wxLARGESMALL(wxALIGN_RIGHT,wxALIGN_LEFT));
 314     locsizer->Add(label, 1, wxALIGN_LEFT | wxLEFT, LAYOUT_MARGIN);
 315     sizer->Add(locsizer, 0, wxALIGN_CENTER_HORIZONTAL | wxTOP, LAYOUT_MARGIN);
 316 #else
 317     // label and time to the right in one row
 318     sizer->Add(locsizer, 0, wxALIGN_RIGHT | wxRIGHT | wxTOP, LAYOUT_MARGIN);
 319     locsizer->Add(dummy);
 320     locsizer->Add(label, 0, wxLEFT, LAYOUT_MARGIN);
 321 #endif
 322
 323     return label;
 324 }
 325
 326 // ----------------------------------------------------------------------------
 327 // wxProgressDialog operations
 328 // ----------------------------------------------------------------------------
 329
 330 bool
 331 wxProgressDialog::Update(int value, const wxString& newmsg, bool *skip)
 332 {
 333     wxASSERT_MSG( value == -1 || m_gauge, wxT("cannot update non existent dialog") );
 334
 335 #ifdef __WXMSW__
 336     value /= m_factor;
 337 #endif // __WXMSW__
 338
 339     wxASSERT_MSG( value <= m_maximum, wxT("invalid progress value") );
 340
 341     // fill up the gauge if value == maximum because this means that the dialog
 342     // is going to close and the gauge shouldn't be partly empty in this case
 343     if ( m_gauge && value <= m_maximum )
 344     {
 345         m_gauge->SetValue(value == m_maximum ? value : value + 1);
 346     }
 347
 348     UpdateMessage(newmsg);
 349
 350     if ( (m_elapsed || m_remaining || m_estimated) && (value != 0) )
 351     {
 352         unsigned long elapsed = wxGetCurrentTime() - m_timeStart;
 353         if (    m_last_timeupdate < elapsed
 354              || value == m_maximum
 355            )
 356         {
 357             m_last_timeupdate = elapsed;
 358             unsigned long estimated = m_break +
 359                   (unsigned long)(( (double) (elapsed-m_break) * m_maximum ) / ((double)value)) ;
 360             if (    estimated > m_display_estimated
 361                  && m_ctdelay >= 0
 362                )
 363             {
 364                 ++m_ctdelay;
 365             }
 366             else if (    estimated < m_display_estimated
 367                       && m_ctdelay <= 0
 368                     )
 369             {
 370                 --m_ctdelay;
 371             }
 372             else
 373             {
 374                 m_ctdelay = 0;
 375             }
 376             if (    m_ctdelay >= m_delay          // enough confirmations for a higher value
 377                  || m_ctdelay <= (m_delay*-1)     // enough confirmations for a lower value
 378                  || value == m_maximum            // to stay consistent
 379                  || elapsed > m_display_estimated // to stay consistent
 380                  || ( elapsed > 0 && elapsed < 4 ) // additional updates in the beginning
 381                )
 382             {
 383                 m_display_estimated = estimated;
 384                 m_ctdelay = 0;
 385             }
 386         }
 387
 388         long display_remaining = m_display_estimated - elapsed;
 389         if ( display_remaining < 0 )
 390         {
 391             display_remaining = 0;
 392         }
 393
 394         SetTimeLabel(elapsed, m_elapsed);
 395         SetTimeLabel(m_display_estimated, m_estimated);
 396         SetTimeLabel(display_remaining, m_remaining);
 397     }
 398
 399     if ( value == m_maximum )
 400     {
 401         if ( m_state == Finished )
 402         {
 403             // ignore multiple calls to Update(m_maximum): it may sometimes be
 404             // troublesome to ensure that Update() is not called twice with the
 405             // same value (e.g. because of the rounding errors) and if we don't
 406             // return now we're going to generate asserts below
 407             return true;
 408         }
 409
 410         // so that we return true below and that out [Cancel] handler knew what
 411         // to do
 412         m_state = Finished;
 413         if( !(GetWindowStyle() & wxPD_AUTO_HIDE) )
 414         {
 415             EnableClose();
 416             DisableSkip();
 417 #if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
 418             EnableCloseButton();
 419 #endif // __WXMSW__
 420
 421             if ( newmsg.empty() )
 422             {
 423                 // also provide the finishing message if the application didn't
 424                 m_msg->SetLabel(_("Done."));
 425             }
 426
 427             wxYieldIfNeeded() ;
 428
 429             (void)ShowModal();
 430         }
 431         else // auto hide
 432         {
 433             // reenable other windows before hiding this one because otherwise
 434             // Windows wouldn't give the focus back to the window which had
 435             // been previously focused because it would still be disabled
 436             ReenableOtherWindows();
 437
 438             Hide();
 439         }
 440     }
 441     else
 442     {
 443         // we have to yield because not only we want to update the display but
 444         // also to process the clicks on the cancel and skip buttons
 445         wxYieldIfNeeded() ;
 446
 447         if ( (m_skip) && (skip != NULL) && (*skip == false) )
 448         {
 449             *skip = true;
 450             m_skip = false;
 451             EnableSkip();
 452         }
 453     }
 454
 455     // update the display in case yielding above didn't do it
 456     Update();
 457
 458     return m_state != Canceled;
 459 }
 460
 461 bool
 462 wxProgressDialog::UpdatePulse(const wxString& newmsg, bool *skip)
 463 {
 464     wxASSERT_MSG( m_gauge, wxT("cannot update non existent dialog") );
 465
 466     // show a bit of progress
 467     m_gauge->Pulse();
 468
 469     UpdateMessage(newmsg);
 470
 471     if (m_elapsed || m_remaining || m_estimated)
 472     {
 473         unsigned long elapsed = wxGetCurrentTime() - m_timeStart;
 474
 475         SetTimeLabel(elapsed, m_elapsed);
 476         SetTimeLabel((unsigned long)-1, m_estimated);
 477         SetTimeLabel((unsigned long)-1, m_remaining);
 478     }
 479
 480     // we have to yield because not only we want to update the display but
 481     // also to process the clicks on the cancel and skip buttons
 482     wxYieldIfNeeded() ;
 483
 484     if ( (m_skip) && (skip != NULL) && (*skip == false) )
 485     {
 486         *skip = true;
 487         m_skip = false;
 488         EnableSkip();
 489     }
 490
 491     return m_state != Canceled;
 492 }
 493
 494 void wxProgressDialog::Resume()
 495 {
 496     m_state = Continue;
 497     m_ctdelay = m_delay; // force an update of the elapsed/estimated/remaining time
 498     m_break += wxGetCurrentTime()-m_timeStop;
 499
 500     EnableAbort();
 501     EnableSkip();
 502     m_skip = false;
 503 }
 504
 505 bool wxProgressDialog::Show( bool show )
 506 {
 507     // reenable other windows before hiding this one because otherwise
 508     // Windows wouldn't give the focus back to the window which had
 509     // been previously focused because it would still be disabled
 510     if(!show)
 511         ReenableOtherWindows();
 512
 513     return wxDialog::Show(show);
 514 }
 515
 516 // ----------------------------------------------------------------------------
 517 // event handlers
 518 // ----------------------------------------------------------------------------
 519
 520 void wxProgressDialog::OnCancel(wxCommandEvent& event)
 521 {
 522     if ( m_state == Finished )
 523     {
 524         // this means that the count down is already finished and we're being
 525         // shown as a modal dialog - so just let the default handler do the job
 526         event.Skip();
 527     }
 528     else
 529     {
 530         // request to cancel was received, the next time Update() is called we
 531         // will handle it
 532         m_state = Canceled;
 533
 534         // update the buttons state immediately so that the user knows that the
 535         // request has been noticed
 536         DisableAbort();
 537         DisableSkip();
 538
 539         // save the time when the dialog was stopped
 540         m_timeStop = wxGetCurrentTime();
 541     }
 542 }
 543
 544 void wxProgressDialog::OnSkip(wxCommandEvent& WXUNUSED(event))
 545 {
 546     DisableSkip();
 547     m_skip = true;
 548 }
 549
 550 void wxProgressDialog::OnClose(wxCloseEvent& event)
 551 {
 552     if ( m_state == Uncancelable )
 553     {
 554         // can't close this dialog
 555         event.Veto();
 556     }
 557     else if ( m_state == Finished )
 558     {
 559         // let the default handler close the window as we already terminated
 560         event.Skip();
 561     }
 562     else
 563     {
 564         // next Update() will notice it
 565         m_state = Canceled;
 566         DisableAbort();
 567         DisableSkip();
 568
 569         m_timeStop = wxGetCurrentTime();
 570     }
 571 }
 572
 573 // ----------------------------------------------------------------------------
 574 // destruction
 575 // ----------------------------------------------------------------------------
 576
 577 wxProgressDialog::~wxProgressDialog()
 578 {
 579     // normally this should have been already done, but just in case
 580     ReenableOtherWindows();
 581 }
 582
 583 void wxProgressDialog::ReenableOtherWindows()
 584 {
 585     if ( GetWindowStyle() & wxPD_APP_MODAL )
 586     {
 587         delete m_winDisabler;
 588         m_winDisabler = (wxWindowDisabler *)NULL;
 589     }
 590     else
 591     {
 592         if ( m_parentTop )
 593             m_parentTop->Enable();
 594     }
 595 }
 596
 597 // ----------------------------------------------------------------------------
 598 // private functions
 599 // ----------------------------------------------------------------------------
 600
 601 static void SetTimeLabel(unsigned long val, wxStaticText *label)
 602 {
 603     if ( label )
 604     {
 605         wxString s;
 606
 607         if (val != (unsigned long)-1)
 608         {
 609         unsigned long hours = val / 3600;
 610         unsigned long minutes = (val % 3600) / 60;
 611         unsigned long seconds = val % 60;
 612         s.Printf(wxT("%lu:%02lu:%02lu"), hours, minutes, seconds);
 613         }
 614         else
 615         {
 616             s = _("Unknown");
 617         }
 618
 619         if ( s != label->GetLabel() )
 620             label->SetLabel(s);
 621     }
 622 }
 623
 624 void wxProgressDialog::EnableSkip(bool enable)
 625 {
 626     if(m_hasSkipButton)
 627     {
 628 #ifdef __SMARTPHONE__
 629         if(enable)
 630             SetRightMenu(wxID_SKIP, _("Skip"));
 631         else
 632             SetRightMenu();
 633 #else
 634         if(m_btnSkip)
 635             m_btnSkip->Enable(enable);
 636 #endif
 637     }
 638 }
 639
 640 void wxProgressDialog::EnableAbort(bool enable)
 641 {
 642     if(m_hasAbortButton)
 643     {
 644 #ifdef __SMARTPHONE__
 645         if(enable)
 646             SetLeftMenu(wxID_CANCEL); // stock buttons makes Cancel label
 647         else
 648             SetLeftMenu();
 649 #else
 650         if(m_btnAbort)
 651             m_btnAbort->Enable(enable);
 652 #endif
 653     }
 654 }
 655
 656 void wxProgressDialog::EnableClose()
 657 {
 658     if(m_hasAbortButton)
 659     {
 660 #ifdef __SMARTPHONE__
 661         SetLeftMenu(wxID_CANCEL, _("Close"));
 662 #else
 663         if(m_btnAbort)
 664         {
 665             m_btnAbort->Enable();
 666             m_btnAbort->SetLabel(_("Close"));
 667         }
 668 #endif
 669     }
 670 }
 671
 672 void wxProgressDialog::UpdateMessage(const wxString &newmsg)
 673 {
 674     if ( !newmsg.empty() && newmsg != m_msg->GetLabel() )
 675     {
 676         m_msg->SetLabel(newmsg);
 677
 678         wxYieldIfNeeded() ;
 679     }
 680 }
 681
 682 #endif // wxUSE_PROGRESSDLG