src/generic/progdlgg.cpp

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