src/generic/progdlgg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        progdlgg.h
   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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "progdlgg.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_PROGRESSDLG
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/utils.h"
  35     #include "wx/frame.h"
  36     #include "wx/button.h"
  37     #include "wx/stattext.h"
  38     #include "wx/layout.h"
  39     #include "wx/event.h"
  40     #include "wx/gauge.h"
  41     #include "wx/intl.h"
  42     #include "wx/settings.h"
  43     #include "wx/dcclient.h"
  44     #include "wx/timer.h"
  45 #endif
  46
  47 #include "wx/generic/progdlgg.h"
  48
  49 // ----------------------------------------------------------------------------
  50 // constants
  51 // ----------------------------------------------------------------------------
  52
  53 #define LAYOUT_X_MARGIN 8
  54 #define LAYOUT_Y_MARGIN 8
  55
  56 // ----------------------------------------------------------------------------
  57 // private functions
  58 // ----------------------------------------------------------------------------
  59
  60 // update the label to show the given time (in seconds)
  61 static void SetTimeLabel(unsigned long val, wxStaticText *label);
  62
  63 // ----------------------------------------------------------------------------
  64 // event tables
  65 // ----------------------------------------------------------------------------
  66
  67 BEGIN_EVENT_TABLE(wxProgressDialog, wxDialog)
  68     EVT_BUTTON(wxID_CANCEL, wxProgressDialog::OnCancel)
  69
  70     EVT_CLOSE(wxProgressDialog::OnClose)
  71 END_EVENT_TABLE()
  72
  73 IMPLEMENT_CLASS(wxProgressDialog, wxDialog)
  74
  75 // ============================================================================
  76 // wxProgressDialog implementation
  77 // ============================================================================
  78
  79 // ----------------------------------------------------------------------------
  80 // wxProgressDialog creation
  81 // ----------------------------------------------------------------------------
  82
  83 wxProgressDialog::wxProgressDialog(wxString const &title,
  84                                    wxString const &message,
  85                                    int maximum,
  86                                    wxWindow *parent,
  87                                    int style)
  88                 : wxDialog(parent, -1, title)
  89 {
  90     // we may disappear at any moment, let the others know about it
  91     SetExtraStyle(GetExtraStyle() | wxWS_EX_TRANSIENT);
  92
  93     m_windowStyle |= style;
  94
  95     bool hasAbortButton = (style & wxPD_CAN_ABORT) != 0;
  96
  97 #if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
  98     // we have to remove the "Close" button from the title bar then as it is
  99     // confusing to have it - it doesn't work anyhow
 100     //
 101     // FIXME: should probably have a (extended?) window style for this
 102     if ( !hasAbortButton )
 103     {
 104         EnableCloseButton(FALSE);
 105     }
 106 #endif // wxMSW
 107
 108     m_state = hasAbortButton ? Continue : Uncancelable;
 109     m_maximum = maximum;
 110
 111 #if defined(__WXMSW__) || defined(__WXPM__)
 112     // we can't have values > 65,536 in the progress control under Windows, so
 113     // scale everything down
 114     m_factor = m_maximum / 65536 + 1;
 115     m_maximum /= m_factor;
 116 #endif // __WXMSW__
 117
 118     m_parentTop = parent;
 119     while ( m_parentTop && m_parentTop->GetParent() )
 120     {
 121         m_parentTop = m_parentTop->GetParent();
 122     }
 123
 124     wxLayoutConstraints *c;
 125
 126     wxClientDC dc(this);
 127     dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 128     long widthText;
 129     dc.GetTextExtent(message, &widthText, NULL, NULL, NULL, NULL);
 130
 131     m_msg = new wxStaticText(this, -1, message);
 132     c = new wxLayoutConstraints;
 133     c->left.SameAs(this, wxLeft, 2*LAYOUT_X_MARGIN);
 134     c->top.SameAs(this, wxTop, 2*LAYOUT_Y_MARGIN);
 135     c->width.AsIs();
 136     c->height.AsIs();
 137     m_msg->SetConstraints(c);
 138
 139     wxSize sizeDlg,
 140            sizeLabel = m_msg->GetSize();
 141     sizeDlg.y = 2*LAYOUT_Y_MARGIN + sizeLabel.y;
 142
 143     wxWindow *lastWindow = m_msg;
 144
 145     if ( maximum > 0 )
 146     {
 147         // note that we can't use wxGA_SMOOTH because it happens to also mean
 148         // wxDIALOG_MODAL and will cause the dialog to be modal. Have an extra
 149         // style argument to wxProgressDialog, perhaps.
 150         m_gauge = new wxGauge(this, -1, m_maximum,
 151                               wxDefaultPosition, wxDefaultSize,
 152                               wxGA_HORIZONTAL);
 153
 154         c = new wxLayoutConstraints;
 155         c->left.SameAs(this, wxLeft, 2*LAYOUT_X_MARGIN);
 156         c->top.Below(m_msg, 2*LAYOUT_Y_MARGIN);
 157         c->right.SameAs(this, wxRight, 2*LAYOUT_X_MARGIN);
 158         c->height.AsIs();
 159         m_gauge->SetConstraints(c);
 160         m_gauge->SetValue(0);
 161         lastWindow = m_gauge;
 162
 163         wxSize sizeGauge = m_gauge->GetSize();
 164         sizeDlg.y += 2*LAYOUT_Y_MARGIN + sizeGauge.y;
 165     }
 166     else
 167         m_gauge = (wxGauge *)NULL;
 168
 169     // create the estimated/remaining/total time zones if requested
 170     m_elapsed = m_estimated = m_remaining = (wxStaticText*)NULL;
 171
 172     // if we are going to have at least one label, remmeber it in this var
 173     wxStaticText *label = NULL;
 174
 175     // also count how many labels we really have
 176     size_t nTimeLabels = 0;
 177
 178     if ( style & wxPD_ELAPSED_TIME )
 179     {
 180         nTimeLabels++;
 181
 182         label =
 183         m_elapsed = CreateLabel(_("Elapsed time : "), &lastWindow);
 184     }
 185
 186     if ( style & wxPD_ESTIMATED_TIME )
 187     {
 188         nTimeLabels++;
 189
 190         label =
 191         m_estimated = CreateLabel(_("Estimated time : "), &lastWindow);
 192     }
 193
 194     if ( style & wxPD_REMAINING_TIME )
 195     {
 196         nTimeLabels++;
 197
 198         label =
 199         m_remaining = CreateLabel(_("Remaining time : "), &lastWindow);
 200     }
 201
 202     if ( nTimeLabels > 0 )
 203     {
 204         // set it to the current time
 205         m_timeStart = wxGetCurrentTime();
 206         sizeDlg.y += nTimeLabels * (label->GetSize().y + LAYOUT_Y_MARGIN);
 207     }
 208
 209     if ( hasAbortButton )
 210     {
 211         m_btnAbort = new wxButton(this, wxID_CANCEL, _("Cancel"));
 212         c = new wxLayoutConstraints;
 213
 214         // Windows dialogs usually have buttons in the lower right corner
 215 #if defined(__WXMSW__) || defined(__WXPM__)
 216         c->right.SameAs(this, wxRight, 2*LAYOUT_X_MARGIN);
 217 #else // !MSW
 218         c->centreX.SameAs(this, wxCentreX);
 219 #endif // MSW/!MSW
 220         c->bottom.SameAs(this, wxBottom, 2*LAYOUT_Y_MARGIN);
 221
 222         c->width.AsIs();
 223         c->height.AsIs();
 224
 225         m_btnAbort->SetConstraints(c);
 226
 227         sizeDlg.y += 2*LAYOUT_Y_MARGIN + wxButton::GetDefaultSize().y;
 228     }
 229     else // no "Cancel" button
 230     {
 231         m_btnAbort = (wxButton *)NULL;
 232     }
 233
 234     SetAutoLayout(TRUE);
 235     Layout();
 236
 237     sizeDlg.y += 2*LAYOUT_Y_MARGIN;
 238
 239     // try to make the dialog not square but rectangular of reasonabel width
 240     sizeDlg.x = (wxCoord)wxMax(widthText, 4*sizeDlg.y/3);
 241     sizeDlg.x *= 3;
 242     sizeDlg.x /= 2;
 243     SetClientSize(sizeDlg);
 244
 245     Centre(wxCENTER_FRAME | wxBOTH);
 246
 247     if ( style & wxPD_APP_MODAL )
 248     {
 249         m_winDisabler = new wxWindowDisabler(this);
 250     }
 251     else
 252     {
 253         if ( m_parentTop )
 254             m_parentTop->Enable(FALSE);
 255         m_winDisabler = NULL;
 256     }
 257
 258     Show(TRUE);
 259     Enable(TRUE); // enable this window
 260
 261     // this one can be initialized even if the others are unknown for now
 262     //
 263     // NB: do it after calling Layout() to keep the labels correctly aligned
 264     if ( m_elapsed )
 265     {
 266         SetTimeLabel(0, m_elapsed);
 267     }
 268
 269 #ifdef __WXMAC__
 270     Update();
 271 #else
 272     // Update the display (especially on X, GTK)
 273     wxYield();
 274 #endif
 275 }
 276
 277 wxStaticText *wxProgressDialog::CreateLabel(const wxString& text,
 278                                             wxWindow **lastWindow)
 279 {
 280     wxLayoutConstraints *c;
 281
 282     wxStaticText *label = new wxStaticText(this, -1, _("unknown"));
 283     c = new wxLayoutConstraints;
 284
 285     // VZ: I like the labels be centered - if the others don't mind, you may
 286     //     remove "#ifdef __WXMSW__" and use it for all ports
 287 #if defined(__WXMSW__) || defined(__WXPM__) || defined(__WXMAC__)
 288     c->left.SameAs(this, wxCentreX, LAYOUT_X_MARGIN);
 289 #else // !MSW
 290     c->right.SameAs(this, wxRight, 2*LAYOUT_X_MARGIN);
 291 #endif // MSW/!MSW
 292     c->top.Below(*lastWindow, LAYOUT_Y_MARGIN);
 293     c->width.AsIs();
 294     c->height.AsIs();
 295     label->SetConstraints(c);
 296
 297     wxStaticText *dummy = new wxStaticText(this, -1, text);
 298     c = new wxLayoutConstraints;
 299     c->right.LeftOf(label);
 300     c->top.SameAs(label, wxTop, 0);
 301     c->width.AsIs();
 302     c->height.AsIs();
 303     dummy->SetConstraints(c);
 304
 305     *lastWindow = label;
 306
 307     return label;
 308 }
 309
 310 // ----------------------------------------------------------------------------
 311 // wxProgressDialog operations
 312 // ----------------------------------------------------------------------------
 313
 314 bool
 315 wxProgressDialog::Update(int value, const wxString& newmsg)
 316 {
 317     wxASSERT_MSG( value == -1 || m_gauge, wxT("cannot update non existent dialog") );
 318
 319 #ifdef __WXMSW__
 320     value /= m_factor;
 321 #endif // __WXMSW__
 322
 323     wxASSERT_MSG( value <= m_maximum, wxT("invalid progress value") );
 324
 325     if ( m_gauge && value < m_maximum )
 326     {
 327         m_gauge->SetValue(value + 1);
 328     }
 329
 330     if ( !newmsg.IsEmpty() )
 331     {
 332         m_msg->SetLabel(newmsg);
 333
 334 #ifdef __WXMAC__
 335         wxYieldIfNeeded() ;
 336 #else
 337         wxYield();
 338 #endif
 339     }
 340
 341     if ( (m_elapsed || m_remaining || m_estimated) && (value != 0) )
 342     {
 343         unsigned long elapsed = wxGetCurrentTime() - m_timeStart;
 344         unsigned long estimated = (unsigned long)(( (double) elapsed * m_maximum ) / ((double)value)) ;
 345         unsigned long remaining = estimated - elapsed;
 346
 347         SetTimeLabel(elapsed, m_elapsed);
 348         SetTimeLabel(estimated, m_estimated);
 349         SetTimeLabel(remaining, m_remaining);
 350     }
 351
 352     if ( value == m_maximum )
 353     {
 354         // so that we return TRUE below and that out [Cancel] handler knew what
 355         // to do
 356         m_state = Finished;
 357         if( !(GetWindowStyle() & wxPD_AUTO_HIDE) )
 358         {
 359             if ( m_btnAbort )
 360             {
 361                 // tell the user what he should do...
 362                 m_btnAbort->SetLabel(_("Close"));
 363             }
 364 #if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
 365             else // enable the button to give the user a way to close the dlg
 366             {
 367                 EnableCloseButton(TRUE);
 368             }
 369 #endif // __WXMSW__
 370
 371             if ( !newmsg )
 372             {
 373                 // also provide the finishing message if the application didn't
 374                 m_msg->SetLabel(_("Done."));
 375             }
 376
 377 #ifdef __WXMAC__
 378             wxYieldIfNeeded() ;
 379 #else
 380             wxYield();
 381 #endif
 382
 383             (void)ShowModal();
 384         }
 385         else // auto hide
 386         {
 387             // reenable other windows before hiding this one because otherwise
 388             // Windows wouldn't give the focus back to the window which had
 389             // been previously focused because it would still be disabled
 390             ReenableOtherWindows();
 391
 392             Hide();
 393         }
 394     }
 395     else
 396     {
 397         // update the display
 398 #ifdef __WXMAC__
 399         wxYieldIfNeeded() ;
 400 #else
 401         wxYield();
 402 #endif
 403     }
 404
 405 #ifdef __WXMAC__
 406     Update();
 407 #endif
 408
 409     return m_state != Canceled;
 410 }
 411
 412 void wxProgressDialog::Resume()
 413 {
 414     m_state = Continue;
 415
 416     // it may have been disabled by OnCancel(), so enable it back to let the
 417     // user interrupt us again if needed
 418     m_btnAbort->Enable();
 419 }
 420
 421 bool wxProgressDialog::Show( bool show )
 422 {
 423     // reenable other windows before hiding this one because otherwise
 424     // Windows wouldn't give the focus back to the window which had
 425     // been previously focused because it would still be disabled
 426     if(!show)
 427         ReenableOtherWindows();
 428
 429     return wxDialog::Show(show);
 430 }
 431
 432 // ----------------------------------------------------------------------------
 433 // event handlers
 434 // ----------------------------------------------------------------------------
 435
 436 void wxProgressDialog::OnCancel(wxCommandEvent& event)
 437 {
 438     if ( m_state == Finished )
 439     {
 440         // this means that the count down is already finished and we're being
 441         // shown as a modal dialog - so just let the default handler do the job
 442         event.Skip();
 443     }
 444     else
 445     {
 446         // request to cancel was received, the next time Update() is called we
 447         // will handle it
 448         m_state = Canceled;
 449
 450         // update the button state immediately so that the user knows that the
 451         // request has been noticed
 452         m_btnAbort->Disable();
 453     }
 454 }
 455
 456 void wxProgressDialog::OnClose(wxCloseEvent& event)
 457 {
 458     if ( m_state == Uncancelable )
 459     {
 460         // can't close this dialog
 461         event.Veto(TRUE);
 462     }
 463     else if ( m_state == Finished )
 464     {
 465         // let the default handler close the window as we already terminated
 466         event.Skip();
 467     }
 468     else
 469     {
 470         // next Update() will notice it
 471         m_state = Canceled;
 472     }
 473 }
 474
 475 // ----------------------------------------------------------------------------
 476 // destruction
 477 // ----------------------------------------------------------------------------
 478
 479 wxProgressDialog::~wxProgressDialog()
 480 {
 481     // normally this should have been already done, but just in case
 482     ReenableOtherWindows();
 483 }
 484
 485 void wxProgressDialog::ReenableOtherWindows()
 486 {
 487     if ( GetWindowStyle() & wxPD_APP_MODAL )
 488     {
 489         delete m_winDisabler;
 490         m_winDisabler = (wxWindowDisabler *)NULL;
 491     }
 492     else
 493     {
 494         if ( m_parentTop )
 495             m_parentTop->Enable(TRUE);
 496     }
 497 }
 498
 499 // ----------------------------------------------------------------------------
 500 // private functions
 501 // ----------------------------------------------------------------------------
 502
 503 static void SetTimeLabel(unsigned long val, wxStaticText *label)
 504 {
 505     if ( label )
 506     {
 507         wxString s;
 508         unsigned long hours = val / 3600;
 509         unsigned long minutes = (val % 3600) / 60;
 510         unsigned long seconds = val % 60;
 511         s.Printf(wxT("%lu:%02lu:%02lu"), hours, minutes, seconds);
 512
 513         if ( s != label->GetLabel() )
 514             label->SetLabel(s);
 515     }
 516 }
 517
 518 #endif // wxUSE_PROGRESSDLG