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 license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  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 #ifdef __WXMSW__
 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 #ifdef __WXMSW__
 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     // Update the display (especially on X, GTK)
 270     wxYield();
 271     wxYield();
 272
 273 #ifdef __WXMAC__
 274     MacUpdateImmediately();
 275 #endif
 276 }
 277
 278 wxStaticText *wxProgressDialog::CreateLabel(const wxString& text,
 279                                             wxWindow **lastWindow)
 280 {
 281     wxLayoutConstraints *c;
 282
 283     wxStaticText *label = new wxStaticText(this, -1, _("unknown"));
 284     c = new wxLayoutConstraints;
 285
 286     // VZ: I like the labels be centered - if the others don't mind, you may
 287     //     remove "#ifdef __WXMSW__" and use it for all ports
 288 #ifdef __WXMSW__
 289     c->left.SameAs(this, wxCentreX, LAYOUT_X_MARGIN);
 290 #else // !MSW
 291     c->right.SameAs(this, wxRight, 2*LAYOUT_X_MARGIN);
 292 #endif // MSW/!MSW
 293     c->top.Below(*lastWindow, LAYOUT_Y_MARGIN);
 294     c->width.AsIs();
 295     c->height.AsIs();
 296     label->SetConstraints(c);
 297
 298     wxStaticText *dummy = new wxStaticText(this, -1, text);
 299     c = new wxLayoutConstraints;
 300     c->right.LeftOf(label);
 301     c->top.SameAs(label, wxTop, 0);
 302     c->width.AsIs();
 303     c->height.AsIs();
 304     dummy->SetConstraints(c);
 305
 306     *lastWindow = label;
 307
 308     return label;
 309 }
 310
 311 // ----------------------------------------------------------------------------
 312 // wxProgressDialog operations
 313 // ----------------------------------------------------------------------------
 314
 315 bool
 316 wxProgressDialog::Update(int value, const wxString& newmsg)
 317 {
 318     wxASSERT_MSG( value == -1 || m_gauge, wxT("cannot update non existent dialog") );
 319
 320 #ifdef __WXMSW__
 321     value /= m_factor;
 322 #endif // __WXMSW__
 323
 324     wxASSERT_MSG( value <= m_maximum, wxT("invalid progress value") );
 325
 326     if ( m_gauge )
 327     {
 328         m_gauge->SetValue(value + 1);
 329     }
 330
 331     if ( !newmsg.IsEmpty() )
 332     {
 333         m_msg->SetLabel(newmsg);
 334
 335         wxYield();
 336         wxYield();
 337     }
 338
 339     if ( (m_elapsed || m_remaining || m_estimated) && (value != 0) )
 340     {
 341         unsigned long elapsed = wxGetCurrentTime() - m_timeStart;
 342         unsigned long estimated = elapsed * m_maximum / value;
 343         unsigned long remaining = estimated - elapsed;
 344
 345         SetTimeLabel(elapsed, m_elapsed);
 346         SetTimeLabel(estimated, m_estimated);
 347         SetTimeLabel(remaining, m_remaining);
 348     }
 349
 350     if ( (value == m_maximum ) )
 351     {
 352         // so that we return TRUE below and that out [Cancel] handler knew what
 353         // to do
 354         m_state = Finished;
 355         if( !(GetWindowStyle() & wxPD_AUTO_HIDE) )
 356         {
 357             if ( m_btnAbort )
 358             {
 359                 // tell the user what he should do...
 360                 m_btnAbort->SetLabel(_("Close"));
 361             }
 362 #if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
 363             else // enable the close button to give the user a way to close the dlg
 364             {
 365                 EnableCloseButton(TRUE);
 366             }
 367 #endif // __WXMSW__
 368
 369             if ( !newmsg )
 370             {
 371                 // also provide the finishing message if the application didn't
 372                 m_msg->SetLabel(_("Done."));
 373             }
 374
 375             wxYield();
 376             wxYield();
 377
 378             (void)ShowModal();
 379         }
 380         else
 381         {
 382             Hide();
 383             ReenableOtherWindows();
 384         }
 385     }
 386     else
 387     {
 388         // update the display
 389         wxYield();
 390         wxYield();
 391     }
 392
 393 #ifdef __WXMAC__
 394     MacUpdateImmediately();
 395 #endif
 396
 397     return m_state != Canceled;
 398 }
 399
 400 void wxProgressDialog::Resume()
 401 {
 402     m_state = Continue;
 403
 404     // it may have been disabled by OnCancel(), so enable it back to let the
 405     // user interrupt us again if needed
 406     m_btnAbort->Enable();
 407 }
 408
 409 // ----------------------------------------------------------------------------
 410 // event handlers
 411 // ----------------------------------------------------------------------------
 412
 413 void wxProgressDialog::OnCancel(wxCommandEvent& event)
 414 {
 415     if ( m_state == Finished )
 416     {
 417         // this means that the count down is already finished and we're being
 418         // shown as a modal dialog - so just let the default handler do the job
 419         event.Skip();
 420     }
 421     else
 422     {
 423         // request to cancel was received, the next time Update() is called we
 424         // will handle it
 425         m_state = Canceled;
 426
 427         // update the button state immediately so that the user knows that the
 428         // request has been noticed
 429         m_btnAbort->Disable();
 430     }
 431 }
 432
 433 void wxProgressDialog::OnClose(wxCloseEvent& event)
 434 {
 435     if ( m_state == Uncancelable )
 436     {
 437         // can't close this dialog
 438         event.Veto(TRUE);
 439     }
 440     else if ( m_state == Finished )
 441     {
 442         // let the default handler close the window as we already terminated
 443         event.Skip();
 444     }
 445     else
 446     {
 447         // next Update() will notice it
 448         m_state = Canceled;
 449     }
 450 }
 451
 452 // ----------------------------------------------------------------------------
 453 // destruction
 454 // ----------------------------------------------------------------------------
 455
 456 wxProgressDialog::~wxProgressDialog()
 457 {
 458     // normally this should have been already done, but just in case
 459     ReenableOtherWindows();
 460 }
 461
 462 void wxProgressDialog::ReenableOtherWindows()
 463 {
 464     if ( GetWindowStyle() & wxPD_APP_MODAL )
 465     {
 466         delete m_winDisabler;
 467         m_winDisabler = (wxWindowDisabler *)NULL;
 468     }
 469     else
 470     {
 471         if ( m_parentTop )
 472             m_parentTop->Enable(TRUE);
 473     }
 474 }
 475
 476 // ----------------------------------------------------------------------------
 477 // private functions
 478 // ----------------------------------------------------------------------------
 479
 480 static void SetTimeLabel(unsigned long val, wxStaticText *label)
 481 {
 482     if ( label )
 483     {
 484         wxString s;
 485         unsigned long hours = val / 3600;
 486         unsigned long minutes = (val % 3600) / 60;
 487         unsigned long seconds = val % 60;
 488         s.Printf(wxT("%lu:%02lu:%02lu"), hours, minutes, seconds);
 489
 490         if ( s != label->GetLabel() )
 491             label->SetLabel(s);
 492     }
 493 }
 494
 495 #endif // wxUSE_PROGRESSDLG