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 = wxGetTopLevelParent(parent);
 119
 120     wxLayoutConstraints *c;
 121
 122     wxClientDC dc(this);
 123     dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 124     long widthText;
 125     dc.GetTextExtent(message, &widthText, NULL, NULL, NULL, NULL);
 126
 127     m_msg = new wxStaticText(this, -1, message);
 128     c = new wxLayoutConstraints;
 129     c->left.SameAs(this, wxLeft, 2*LAYOUT_X_MARGIN);
 130     c->top.SameAs(this, wxTop, 2*LAYOUT_Y_MARGIN);
 131     c->width.AsIs();
 132     c->height.AsIs();
 133     m_msg->SetConstraints(c);
 134
 135     wxSize sizeDlg,
 136            sizeLabel = m_msg->GetSize();
 137     sizeDlg.y = 2*LAYOUT_Y_MARGIN + sizeLabel.y;
 138
 139     wxWindow *lastWindow = m_msg;
 140
 141     if ( maximum > 0 )
 142     {
 143         // note that we can't use wxGA_SMOOTH because it happens to
 144         // cause the dialog to be modal. Have an extra
 145         // style argument to wxProgressDialog, perhaps.
 146         m_gauge = new wxGauge(this, -1, m_maximum,
 147                               wxDefaultPosition, wxDefaultSize,
 148                               wxGA_HORIZONTAL);
 149
 150         c = new wxLayoutConstraints;
 151         c->left.SameAs(this, wxLeft, 2*LAYOUT_X_MARGIN);
 152         c->top.Below(m_msg, 2*LAYOUT_Y_MARGIN);
 153         c->right.SameAs(this, wxRight, 2*LAYOUT_X_MARGIN);
 154         c->height.AsIs();
 155         m_gauge->SetConstraints(c);
 156         m_gauge->SetValue(0);
 157         lastWindow = m_gauge;
 158
 159         wxSize sizeGauge = m_gauge->GetSize();
 160         sizeDlg.y += 2*LAYOUT_Y_MARGIN + sizeGauge.y;
 161     }
 162     else
 163         m_gauge = (wxGauge *)NULL;
 164
 165     // create the estimated/remaining/total time zones if requested
 166     m_elapsed = m_estimated = m_remaining = (wxStaticText*)NULL;
 167
 168     // if we are going to have at least one label, remmeber it in this var
 169     wxStaticText *label = NULL;
 170
 171     // also count how many labels we really have
 172     size_t nTimeLabels = 0;
 173
 174     if ( style & wxPD_ELAPSED_TIME )
 175     {
 176         nTimeLabels++;
 177
 178         label =
 179         m_elapsed = CreateLabel(_("Elapsed time : "), &lastWindow);
 180     }
 181
 182     if ( style & wxPD_ESTIMATED_TIME )
 183     {
 184         nTimeLabels++;
 185
 186         label =
 187         m_estimated = CreateLabel(_("Estimated time : "), &lastWindow);
 188     }
 189
 190     if ( style & wxPD_REMAINING_TIME )
 191     {
 192         nTimeLabels++;
 193
 194         label =
 195         m_remaining = CreateLabel(_("Remaining time : "), &lastWindow);
 196     }
 197
 198     if ( nTimeLabels > 0 )
 199     {
 200         // set it to the current time
 201         m_timeStart = wxGetCurrentTime();
 202         sizeDlg.y += nTimeLabels * (label->GetSize().y + LAYOUT_Y_MARGIN);
 203     }
 204
 205     if ( hasAbortButton )
 206     {
 207         m_btnAbort = new wxButton(this, wxID_CANCEL, _("Cancel"));
 208         c = new wxLayoutConstraints;
 209
 210         // Windows dialogs usually have buttons in the lower right corner
 211 #if defined(__WXMSW__) || defined(__WXPM__)
 212         c->right.SameAs(this, wxRight, 2*LAYOUT_X_MARGIN);
 213 #else // !MSW
 214         c->centreX.SameAs(this, wxCentreX);
 215 #endif // MSW/!MSW
 216         c->bottom.SameAs(this, wxBottom, 2*LAYOUT_Y_MARGIN);
 217
 218         c->width.AsIs();
 219         c->height.AsIs();
 220
 221         m_btnAbort->SetConstraints(c);
 222
 223         sizeDlg.y += 2*LAYOUT_Y_MARGIN + wxButton::GetDefaultSize().y;
 224     }
 225     else // no "Cancel" button
 226     {
 227         m_btnAbort = (wxButton *)NULL;
 228     }
 229
 230     SetAutoLayout(TRUE);
 231     Layout();
 232
 233     sizeDlg.y += 2*LAYOUT_Y_MARGIN;
 234
 235     // try to make the dialog not square but rectangular of reasonabel width
 236     sizeDlg.x = (wxCoord)wxMax(widthText, 4*sizeDlg.y/3);
 237     sizeDlg.x *= 3;
 238     sizeDlg.x /= 2;
 239     SetClientSize(sizeDlg);
 240
 241     Centre(wxCENTER_FRAME | wxBOTH);
 242
 243     if ( style & wxPD_APP_MODAL )
 244     {
 245         m_winDisabler = new wxWindowDisabler(this);
 246     }
 247     else
 248     {
 249         if ( m_parentTop )
 250             m_parentTop->Enable(FALSE);
 251         m_winDisabler = NULL;
 252     }
 253
 254     Show(TRUE);
 255     Enable(TRUE); // enable this window
 256
 257     // this one can be initialized even if the others are unknown for now
 258     //
 259     // NB: do it after calling Layout() to keep the labels correctly aligned
 260     if ( m_elapsed )
 261     {
 262         SetTimeLabel(0, m_elapsed);
 263     }
 264
 265     Update();
 266 }
 267
 268 wxStaticText *wxProgressDialog::CreateLabel(const wxString& text,
 269                                             wxWindow **lastWindow)
 270 {
 271     wxLayoutConstraints *c;
 272
 273     wxStaticText *label = new wxStaticText(this, -1, _("unknown"));
 274     c = new wxLayoutConstraints;
 275
 276     // VZ: I like the labels be centered - if the others don't mind, you may
 277     //     remove "#ifdef __WXMSW__" and use it for all ports
 278 #if defined(__WXMSW__) || defined(__WXPM__) || defined(__WXMAC__)
 279     c->left.SameAs(this, wxCentreX, LAYOUT_X_MARGIN);
 280 #else // !MSW
 281     c->right.SameAs(this, wxRight, 2*LAYOUT_X_MARGIN);
 282 #endif // MSW/!MSW
 283     c->top.Below(*lastWindow, LAYOUT_Y_MARGIN);
 284     c->width.AsIs();
 285     c->height.AsIs();
 286     label->SetConstraints(c);
 287
 288     wxStaticText *dummy = new wxStaticText(this, -1, text);
 289     c = new wxLayoutConstraints;
 290     c->right.LeftOf(label);
 291     c->top.SameAs(label, wxTop, 0);
 292     c->width.AsIs();
 293     c->height.AsIs();
 294     dummy->SetConstraints(c);
 295
 296     *lastWindow = label;
 297
 298     return label;
 299 }
 300
 301 // ----------------------------------------------------------------------------
 302 // wxProgressDialog operations
 303 // ----------------------------------------------------------------------------
 304
 305 bool
 306 wxProgressDialog::Update(int value, const wxString& newmsg)
 307 {
 308     wxASSERT_MSG( value == -1 || m_gauge, wxT("cannot update non existent dialog") );
 309
 310 #ifdef __WXMSW__
 311     value /= m_factor;
 312 #endif // __WXMSW__
 313
 314     wxASSERT_MSG( value <= m_maximum, wxT("invalid progress value") );
 315
 316     if ( m_gauge && value < m_maximum )
 317     {
 318         m_gauge->SetValue(value + 1);
 319     }
 320
 321     if ( !newmsg.IsEmpty() )
 322     {
 323         m_msg->SetLabel(newmsg);
 324
 325         wxYieldIfNeeded() ;
 326     }
 327
 328     if ( (m_elapsed || m_remaining || m_estimated) && (value != 0) )
 329     {
 330         unsigned long elapsed = wxGetCurrentTime() - m_timeStart;
 331         unsigned long estimated = (unsigned long)(( (double) elapsed * m_maximum ) / ((double)value)) ;
 332         unsigned long remaining = estimated - elapsed;
 333
 334         SetTimeLabel(elapsed, m_elapsed);
 335         SetTimeLabel(estimated, m_estimated);
 336         SetTimeLabel(remaining, m_remaining);
 337     }
 338
 339     if ( value == m_maximum )
 340     {
 341         // so that we return TRUE below and that out [Cancel] handler knew what
 342         // to do
 343         m_state = Finished;
 344         if( !(GetWindowStyle() & wxPD_AUTO_HIDE) )
 345         {
 346             if ( m_btnAbort )
 347             {
 348                 // tell the user what he should do...
 349                 m_btnAbort->SetLabel(_("Close"));
 350             }
 351 #if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
 352             else // enable the button to give the user a way to close the dlg
 353             {
 354                 EnableCloseButton(TRUE);
 355             }
 356 #endif // __WXMSW__
 357
 358             if ( !newmsg )
 359             {
 360                 // also provide the finishing message if the application didn't
 361                 m_msg->SetLabel(_("Done."));
 362             }
 363
 364             wxYieldIfNeeded() ;
 365
 366             (void)ShowModal();
 367         }
 368         else // auto hide
 369         {
 370             // reenable other windows before hiding this one because otherwise
 371             // Windows wouldn't give the focus back to the window which had
 372             // been previously focused because it would still be disabled
 373             ReenableOtherWindows();
 374
 375             Hide();
 376         }
 377     }
 378     else
 379     {
 380         // we have to yield because not only we want to update the display but
 381         // also to process the clicks on the cancel button
 382         wxYieldIfNeeded() ;
 383     }
 384
 385     // update the display in case yielding above didn't do it
 386     Update();
 387
 388     return m_state != Canceled;
 389 }
 390
 391 void wxProgressDialog::Resume()
 392 {
 393     m_state = Continue;
 394
 395     // it may have been disabled by OnCancel(), so enable it back to let the
 396     // user interrupt us again if needed
 397     m_btnAbort->Enable();
 398 }
 399
 400 bool wxProgressDialog::Show( bool show )
 401 {
 402     // reenable other windows before hiding this one because otherwise
 403     // Windows wouldn't give the focus back to the window which had
 404     // been previously focused because it would still be disabled
 405     if(!show)
 406         ReenableOtherWindows();
 407
 408     return wxDialog::Show(show);
 409 }
 410
 411 // ----------------------------------------------------------------------------
 412 // event handlers
 413 // ----------------------------------------------------------------------------
 414
 415 void wxProgressDialog::OnCancel(wxCommandEvent& event)
 416 {
 417     if ( m_state == Finished )
 418     {
 419         // this means that the count down is already finished and we're being
 420         // shown as a modal dialog - so just let the default handler do the job
 421         event.Skip();
 422     }
 423     else
 424     {
 425         // request to cancel was received, the next time Update() is called we
 426         // will handle it
 427         m_state = Canceled;
 428
 429         // update the button state immediately so that the user knows that the
 430         // request has been noticed
 431         m_btnAbort->Disable();
 432     }
 433 }
 434
 435 void wxProgressDialog::OnClose(wxCloseEvent& event)
 436 {
 437     if ( m_state == Uncancelable )
 438     {
 439         // can't close this dialog
 440         event.Veto(TRUE);
 441     }
 442     else if ( m_state == Finished )
 443     {
 444         // let the default handler close the window as we already terminated
 445         event.Skip();
 446     }
 447     else
 448     {
 449         // next Update() will notice it
 450         m_state = Canceled;
 451     }
 452 }
 453
 454 // ----------------------------------------------------------------------------
 455 // destruction
 456 // ----------------------------------------------------------------------------
 457
 458 wxProgressDialog::~wxProgressDialog()
 459 {
 460     // normally this should have been already done, but just in case
 461     ReenableOtherWindows();
 462 }
 463
 464 void wxProgressDialog::ReenableOtherWindows()
 465 {
 466     if ( GetWindowStyle() & wxPD_APP_MODAL )
 467     {
 468         delete m_winDisabler;
 469         m_winDisabler = (wxWindowDisabler *)NULL;
 470     }
 471     else
 472     {
 473         if ( m_parentTop )
 474             m_parentTop->Enable(TRUE);
 475     }
 476 }
 477
 478 // ----------------------------------------------------------------------------
 479 // private functions
 480 // ----------------------------------------------------------------------------
 481
 482 static void SetTimeLabel(unsigned long val, wxStaticText *label)
 483 {
 484     if ( label )
 485     {
 486         wxString s;
 487         unsigned long hours = val / 3600;
 488         unsigned long minutes = (val % 3600) / 60;
 489         unsigned long seconds = val % 60;
 490         s.Printf(wxT("%lu:%02lu:%02lu"), hours, minutes, seconds);
 491
 492         if ( s != label->GetLabel() )
 493             label->SetLabel(s);
 494     }
 495 }
 496
 497 #endif // wxUSE_PROGRESSDLG