src/generic/logg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/logg.cpp
   3 // Purpose:     wxLog-derived classes which need GUI support (the rest is in
   4 //              src/common/log.cpp)
   5 // Author:      Vadim Zeitlin
   6 // Modified by:
   7 // Created:     20.09.99 (extracted from src/common/log.cpp)
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
  10 // Licence:     wxWindows license
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ============================================================================
  14 // declarations
  15 // ============================================================================
  16
  17 // ----------------------------------------------------------------------------
  18 // headers
  19 // ----------------------------------------------------------------------------
  20
  21 // no #pragma implementation "log.h" because it's already in src/common/log.cpp
  22
  23 // For compilers that support precompilation, includes "wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27   #pragma hdrstop
  28 #endif
  29
  30 #if !wxUSE_GUI
  31     #error "This file can't be compiled without GUI!"
  32 #endif
  33
  34 #ifndef WX_PRECOMP
  35     #include "wx/app.h"
  36     #include "wx/button.h"
  37     #include "wx/intl.h"
  38     #include "wx/log.h"
  39     #include "wx/menu.h"
  40     #include "wx/frame.h"
  41     #include "wx/filedlg.h"
  42     #include "wx/msgdlg.h"
  43     #include "wx/textctrl.h"
  44     #include "wx/sizer.h"
  45     #include "wx/statbmp.h"
  46     #include "wx/button.h"
  47     #include "wx/settings.h"
  48 #endif // WX_PRECOMP
  49
  50 #if wxUSE_LOGGUI || wxUSE_LOGWINDOW
  51
  52 #include "wx/file.h"
  53 #include "wx/textfile.h"
  54 #include "wx/statline.h"
  55 #include "wx/artprov.h"
  56
  57 #ifdef  __WXMSW__
  58   // for OutputDebugString()
  59   #include  "wx/msw/private.h"
  60 #endif // Windows
  61
  62 #if wxUSE_LOG_DIALOG
  63     #include "wx/listctrl.h"
  64     #include "wx/imaglist.h"
  65     #include "wx/image.h"
  66 #else // !wxUSE_LOG_DIALOG
  67     #include "wx/msgdlg.h"
  68 #endif // wxUSE_LOG_DIALOG/!wxUSE_LOG_DIALOG
  69
  70 // the suffix we add to the button to show that the dialog can be expanded
  71 #define EXPAND_SUFFIX _T(" >>")
  72
  73 // ----------------------------------------------------------------------------
  74 // private classes
  75 // ----------------------------------------------------------------------------
  76
  77 #if wxUSE_LOG_DIALOG
  78
  79 // this function is a wrapper around strftime(3)
  80 // allows to exclude the usage of wxDateTime
  81 static wxString TimeStamp(const wxChar *format, time_t t)
  82 {
  83     wxChar buf[4096];
  84     if ( !wxStrftime(buf, WXSIZEOF(buf), format, localtime(&t)) )
  85     {
  86         // buffer is too small?
  87         wxFAIL_MSG(_T("strftime() failed"));
  88     }
  89     return wxString(buf);
  90 }
  91
  92
  93 class wxLogDialog : public wxDialog
  94 {
  95 public:
  96     wxLogDialog(wxWindow *parent,
  97                 const wxArrayString& messages,
  98                 const wxArrayInt& severity,
  99                 const wxArrayLong& timess,
 100                 const wxString& caption,
 101                 long style);
 102     virtual ~wxLogDialog();
 103
 104     // event handlers
 105     void OnOk(wxCommandEvent& event);
 106     void OnDetails(wxCommandEvent& event);
 107 #if wxUSE_FILE
 108     void OnSave(wxCommandEvent& event);
 109 #endif // wxUSE_FILE
 110     void OnListSelect(wxListEvent& event);
 111
 112 private:
 113     // create controls needed for the details display
 114     void CreateDetailsControls();
 115
 116     // the data for the listctrl
 117     wxArrayString m_messages;
 118     wxArrayInt m_severity;
 119     wxArrayLong m_times;
 120
 121     // the "toggle" button and its state
 122     wxButton *m_btnDetails;
 123     bool      m_showingDetails;
 124
 125     // the controls which are not shown initially (but only when details
 126     // button is pressed)
 127     wxListCtrl *m_listctrl;
 128 #if wxUSE_STATLINE
 129     wxStaticLine *m_statline;
 130 #endif // wxUSE_STATLINE
 131 #if wxUSE_FILE
 132     wxButton *m_btnSave;
 133 #endif // wxUSE_FILE
 134
 135     // the translated "Details" string
 136     static wxString ms_details;
 137
 138     DECLARE_EVENT_TABLE()
 139 };
 140
 141 BEGIN_EVENT_TABLE(wxLogDialog, wxDialog)
 142     EVT_BUTTON(wxID_CANCEL, wxLogDialog::OnOk)
 143     EVT_BUTTON(wxID_MORE,   wxLogDialog::OnDetails)
 144 #if wxUSE_FILE
 145     EVT_BUTTON(wxID_SAVE,   wxLogDialog::OnSave)
 146 #endif // wxUSE_FILE
 147     EVT_LIST_ITEM_SELECTED(-1, wxLogDialog::OnListSelect)
 148 END_EVENT_TABLE()
 149
 150 #endif // wxUSE_LOG_DIALOG
 151
 152 // ----------------------------------------------------------------------------
 153 // private functions
 154 // ----------------------------------------------------------------------------
 155
 156 #if wxUSE_FILE && wxUSE_FILEDLG
 157
 158 // pass an uninitialized file object, the function will ask the user for the
 159 // filename and try to open it, returns TRUE on success (file was opened),
 160 // FALSE if file couldn't be opened/created and -1 if the file selection
 161 // dialog was cancelled
 162 static int OpenLogFile(wxFile& file, wxString *filename = NULL);
 163
 164 #endif // wxUSE_FILE
 165
 166 // ----------------------------------------------------------------------------
 167 // global variables
 168 // ----------------------------------------------------------------------------
 169
 170 // we use a global variable to store the frame pointer for wxLogStatus - bad,
 171 // but it's the easiest way
 172 static wxFrame *gs_pFrame = NULL; // FIXME MT-unsafe
 173
 174 // ============================================================================
 175 // implementation
 176 // ============================================================================
 177
 178 // ----------------------------------------------------------------------------
 179 // global functions
 180 // ----------------------------------------------------------------------------
 181
 182 // accepts an additional argument which tells to which frame the output should
 183 // be directed
 184 void wxVLogStatus(wxFrame *pFrame, const wxChar *szFormat, va_list argptr)
 185 {
 186   wxString msg;
 187
 188   wxLog *pLog = wxLog::GetActiveTarget();
 189   if ( pLog != NULL ) {
 190     msg.PrintfV(szFormat, argptr);
 191
 192     wxASSERT( gs_pFrame == NULL ); // should be reset!
 193     gs_pFrame = pFrame;
 194     wxLog::OnLog(wxLOG_Status, msg, time(NULL));
 195     gs_pFrame = (wxFrame *) NULL;
 196   }
 197 }
 198
 199 void wxLogStatus(wxFrame *pFrame, const wxChar *szFormat, ...)
 200 {
 201     va_list argptr;
 202     va_start(argptr, szFormat);
 203     wxVLogStatus(pFrame, szFormat, argptr);
 204     va_end(argptr);
 205 }
 206
 207 // ----------------------------------------------------------------------------
 208 // wxLogGui implementation (FIXME MT-unsafe)
 209 // ----------------------------------------------------------------------------
 210
 211 wxLogGui::wxLogGui()
 212 {
 213     Clear();
 214 }
 215
 216 void wxLogGui::Clear()
 217 {
 218     m_bErrors =
 219     m_bWarnings =
 220     m_bHasMessages = FALSE;
 221
 222     m_aMessages.Empty();
 223     m_aSeverity.Empty();
 224     m_aTimes.Empty();
 225 }
 226
 227 void wxLogGui::Flush()
 228 {
 229     if ( !m_bHasMessages )
 230         return;
 231
 232     // do it right now to block any new calls to Flush() while we're here
 233     m_bHasMessages = FALSE;
 234
 235     wxString appName = wxTheApp->GetAppName();
 236     if ( !!appName )
 237         appName[0u] = wxToupper(appName[0u]);
 238
 239     long style;
 240     wxString titleFormat;
 241     if ( m_bErrors ) {
 242         titleFormat = _("%s Error");
 243         style = wxICON_STOP;
 244     }
 245     else if ( m_bWarnings ) {
 246         titleFormat = _("%s Warning");
 247         style = wxICON_EXCLAMATION;
 248     }
 249     else {
 250         titleFormat = _("%s Information");
 251         style = wxICON_INFORMATION;
 252     }
 253
 254     wxString title;
 255     title.Printf(titleFormat, appName.c_str());
 256
 257     size_t nMsgCount = m_aMessages.Count();
 258
 259     // avoid showing other log dialogs until we're done with the dialog we're
 260     // showing right now: nested modal dialogs make for really bad UI!
 261     Suspend();
 262
 263     wxString str;
 264     if ( nMsgCount == 1 )
 265     {
 266         str = m_aMessages[0];
 267     }
 268     else // more than one message
 269     {
 270 #if wxUSE_LOG_DIALOG
 271
 272         wxLogDialog dlg(NULL,
 273                         m_aMessages, m_aSeverity, m_aTimes,
 274                         title, style);
 275
 276         // clear the message list before showing the dialog because while it's
 277         // shown some new messages may appear
 278         Clear();
 279
 280         (void)dlg.ShowModal();
 281 #else // !wxUSE_LOG_DIALOG
 282         // concatenate all strings (but not too many to not overfill the msg box)
 283         size_t nLines = 0;
 284
 285         // start from the most recent message
 286         for ( size_t n = nMsgCount; n > 0; n-- ) {
 287             // for Windows strings longer than this value are wrapped (NT 4.0)
 288             const size_t nMsgLineWidth = 156;
 289
 290             nLines += (m_aMessages[n - 1].Len() + nMsgLineWidth - 1) / nMsgLineWidth;
 291
 292             if ( nLines > 25 )  // don't put too many lines in message box
 293                 break;
 294
 295             str << m_aMessages[n - 1] << wxT("\n");
 296         }
 297 #endif // wxUSE_LOG_DIALOG/!wxUSE_LOG_DIALOG
 298     }
 299
 300     // this catches both cases of 1 message with wxUSE_LOG_DIALOG and any
 301     // situation without it
 302     if ( !!str )
 303     {
 304         wxMessageBox(str, title, wxOK | style);
 305
 306         // no undisplayed messages whatsoever
 307         Clear();
 308     }
 309
 310     // allow flushing the logs again
 311     Resume();
 312 }
 313
 314 // log all kinds of messages
 315 void wxLogGui::DoLog(wxLogLevel level, const wxChar *szString, time_t t)
 316 {
 317     switch ( level ) {
 318         case wxLOG_Info:
 319             if ( GetVerbose() )
 320         case wxLOG_Message:
 321             {
 322                 m_aMessages.Add(szString);
 323                 m_aSeverity.Add(wxLOG_Message);
 324                 m_aTimes.Add((long)t);
 325                 m_bHasMessages = TRUE;
 326             }
 327             break;
 328
 329         case wxLOG_Status:
 330 #if wxUSE_STATUSBAR
 331             {
 332                 // find the top window and set it's status text if it has any
 333                 wxFrame *pFrame = gs_pFrame;
 334                 if ( pFrame == NULL ) {
 335                     wxWindow *pWin = wxTheApp->GetTopWindow();
 336                     if ( pWin != NULL && pWin->IsKindOf(CLASSINFO(wxFrame)) ) {
 337                         pFrame = (wxFrame *)pWin;
 338                     }
 339                 }
 340
 341                 if ( pFrame && pFrame->GetStatusBar() )
 342                     pFrame->SetStatusText(szString);
 343             }
 344 #endif // wxUSE_STATUSBAR
 345             break;
 346
 347         case wxLOG_Trace:
 348         case wxLOG_Debug:
 349             #ifdef __WXDEBUG__
 350             {
 351                 wxString str;
 352                 TimeStamp(&str);
 353                 str += szString;
 354
 355                 #if defined(__WXMSW__) && !defined(__WXMICROWIN__)
 356                     // don't prepend debug/trace here: it goes to the
 357                     // debug window anyhow
 358                     str += wxT("\r\n");
 359                     OutputDebugString(str);
 360                 #else
 361                     // send them to stderr
 362                     wxFprintf(stderr, wxT("[%s] %s\n"),
 363                               level == wxLOG_Trace ? wxT("Trace")
 364                                                    : wxT("Debug"),
 365                               str.c_str());
 366                     fflush(stderr);
 367                 #endif
 368             }
 369             #endif // __WXDEBUG__
 370
 371             break;
 372
 373         case wxLOG_FatalError:
 374             // show this one immediately
 375             wxMessageBox(szString, _("Fatal error"), wxICON_HAND);
 376             wxExit();
 377             break;
 378
 379         case wxLOG_Error:
 380             if ( !m_bErrors ) {
 381 #if !wxUSE_LOG_DIALOG
 382                 // discard earlier informational messages if this is the 1st
 383                 // error because they might not make sense any more and showing
 384                 // them in a message box might be confusing
 385                 m_aMessages.Empty();
 386                 m_aSeverity.Empty();
 387                 m_aTimes.Empty();
 388 #endif // wxUSE_LOG_DIALOG
 389                 m_bErrors = TRUE;
 390             }
 391             // fall through
 392
 393         case wxLOG_Warning:
 394             if ( !m_bErrors ) {
 395                 // for the warning we don't discard the info messages
 396                 m_bWarnings = TRUE;
 397             }
 398
 399             m_aMessages.Add(szString);
 400             m_aSeverity.Add((int)level);
 401             m_aTimes.Add((long)t);
 402             m_bHasMessages = TRUE;
 403             break;
 404     }
 405 }
 406
 407 // ----------------------------------------------------------------------------
 408 // wxLogWindow and wxLogFrame implementation
 409 // ----------------------------------------------------------------------------
 410
 411 // log frame class
 412 // ---------------
 413 class wxLogFrame : public wxFrame
 414 {
 415 public:
 416     // ctor & dtor
 417     wxLogFrame(wxFrame *pParent, wxLogWindow *log, const wxChar *szTitle);
 418     virtual ~wxLogFrame();
 419
 420     // menu callbacks
 421     void OnClose(wxCommandEvent& event);
 422     void OnCloseWindow(wxCloseEvent& event);
 423 #if wxUSE_FILE
 424     void OnSave (wxCommandEvent& event);
 425 #endif // wxUSE_FILE
 426     void OnClear(wxCommandEvent& event);
 427
 428     void OnIdle(wxIdleEvent&);
 429
 430     // accessors
 431     wxTextCtrl *TextCtrl() const { return m_pTextCtrl; }
 432
 433 private:
 434     // use standard ids for our commands!
 435     enum
 436     {
 437         Menu_Close = wxID_CLOSE,
 438         Menu_Save  = wxID_SAVE,
 439         Menu_Clear = wxID_CLEAR
 440     };
 441
 442     // common part of OnClose() and OnCloseWindow()
 443     void DoClose();
 444
 445     wxTextCtrl  *m_pTextCtrl;
 446     wxLogWindow *m_log;
 447
 448     DECLARE_EVENT_TABLE()
 449 };
 450
 451 BEGIN_EVENT_TABLE(wxLogFrame, wxFrame)
 452     // wxLogWindow menu events
 453     EVT_MENU(Menu_Close, wxLogFrame::OnClose)
 454 #if wxUSE_FILE
 455     EVT_MENU(Menu_Save,  wxLogFrame::OnSave)
 456 #endif // wxUSE_FILE
 457     EVT_MENU(Menu_Clear, wxLogFrame::OnClear)
 458
 459     EVT_CLOSE(wxLogFrame::OnCloseWindow)
 460 END_EVENT_TABLE()
 461
 462 wxLogFrame::wxLogFrame(wxFrame *pParent, wxLogWindow *log, const wxChar *szTitle)
 463           : wxFrame(pParent, -1, szTitle)
 464 {
 465     m_log = log;
 466
 467     m_pTextCtrl = new wxTextCtrl(this, -1, wxEmptyString, wxDefaultPosition,
 468             wxDefaultSize,
 469             wxTE_MULTILINE  |
 470             wxHSCROLL       |
 471             // needed for Win32 to avoid 65Kb limit but it doesn't work well
 472             // when using RichEdit 2.0 which we always do in the Unicode build
 473 #if !wxUSE_UNICODE
 474             wxTE_RICH       |
 475 #endif // !wxUSE_UNICODE
 476             wxTE_READONLY);
 477
 478 #if wxUSE_MENUS
 479     // create menu
 480     wxMenuBar *pMenuBar = new wxMenuBar;
 481     wxMenu *pMenu = new wxMenu;
 482 #if wxUSE_FILE
 483     pMenu->Append(Menu_Save,  _("&Save..."), _("Save log contents to file"));
 484 #endif // wxUSE_FILE
 485     pMenu->Append(Menu_Clear, _("C&lear"), _("Clear the log contents"));
 486     pMenu->AppendSeparator();
 487     pMenu->Append(Menu_Close, _("&Close"), _("Close this window"));
 488     pMenuBar->Append(pMenu, _("&Log"));
 489     SetMenuBar(pMenuBar);
 490 #endif // wxUSE_MENUS
 491
 492 #if wxUSE_STATUSBAR
 493     // status bar for menu prompts
 494     CreateStatusBar();
 495 #endif // wxUSE_STATUSBAR
 496
 497     m_log->OnFrameCreate(this);
 498 }
 499
 500 void wxLogFrame::DoClose()
 501 {
 502     if ( m_log->OnFrameClose(this) )
 503     {
 504         // instead of closing just hide the window to be able to Show() it
 505         // later
 506         Show(FALSE);
 507     }
 508 }
 509
 510 void wxLogFrame::OnClose(wxCommandEvent& WXUNUSED(event))
 511 {
 512     DoClose();
 513 }
 514
 515 void wxLogFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 516 {
 517     DoClose();
 518 }
 519
 520 #if wxUSE_FILE
 521 void wxLogFrame::OnSave(wxCommandEvent& WXUNUSED(event))
 522 {
 523 #if wxUSE_FILEDLG
 524     wxString filename;
 525     wxFile file;
 526     int rc = OpenLogFile(file, &filename);
 527     if ( rc == -1 )
 528     {
 529         // cancelled
 530         return;
 531     }
 532
 533     bool bOk = rc != 0;
 534
 535     // retrieve text and save it
 536     // -------------------------
 537     int nLines = m_pTextCtrl->GetNumberOfLines();
 538     for ( int nLine = 0; bOk && nLine < nLines; nLine++ ) {
 539         bOk = file.Write(m_pTextCtrl->GetLineText(nLine) +
 540                          wxTextFile::GetEOL());
 541     }
 542
 543     if ( bOk )
 544         bOk = file.Close();
 545
 546     if ( !bOk ) {
 547         wxLogError(_("Can't save log contents to file."));
 548     }
 549     else {
 550         wxLogStatus(this, _("Log saved to the file '%s'."), filename.c_str());
 551     }
 552 #endif
 553 }
 554 #endif // wxUSE_FILE
 555
 556 void wxLogFrame::OnClear(wxCommandEvent& WXUNUSED(event))
 557 {
 558     m_pTextCtrl->Clear();
 559 }
 560
 561 wxLogFrame::~wxLogFrame()
 562 {
 563     m_log->OnFrameDelete(this);
 564 }
 565
 566 // wxLogWindow
 567 // -----------
 568
 569 wxLogWindow::wxLogWindow(wxFrame *pParent,
 570                          const wxChar *szTitle,
 571                          bool bShow,
 572                          bool bDoPass)
 573 {
 574     PassMessages(bDoPass);
 575
 576     m_pLogFrame = new wxLogFrame(pParent, this, szTitle);
 577
 578     if ( bShow )
 579         m_pLogFrame->Show(TRUE);
 580 }
 581
 582 void wxLogWindow::Show(bool bShow)
 583 {
 584     m_pLogFrame->Show(bShow);
 585 }
 586
 587 void wxLogWindow::DoLog(wxLogLevel level, const wxChar *szString, time_t t)
 588 {
 589     // first let the previous logger show it
 590     wxLogPassThrough::DoLog(level, szString, t);
 591
 592     if ( m_pLogFrame ) {
 593         switch ( level ) {
 594             case wxLOG_Status:
 595                 // by default, these messages are ignored by wxLog, so process
 596                 // them ourselves
 597                 if ( !wxIsEmpty(szString) )
 598                 {
 599                     wxString str;
 600                     str << _("Status: ") << szString;
 601                     DoLogString(str, t);
 602                 }
 603                 break;
 604
 605                 // don't put trace messages in the text window for 2 reasons:
 606                 // 1) there are too many of them
 607                 // 2) they may provoke other trace messages thus sending a program
 608                 //    into an infinite loop
 609             case wxLOG_Trace:
 610                 break;
 611
 612             default:
 613                 // and this will format it nicely and call our DoLogString()
 614                 wxLog::DoLog(level, szString, t);
 615         }
 616     }
 617
 618     m_bHasMessages = TRUE;
 619 }
 620
 621 void wxLogWindow::DoLogString(const wxChar *szString, time_t WXUNUSED(t))
 622 {
 623     // put the text into our window
 624     wxTextCtrl *pText = m_pLogFrame->TextCtrl();
 625
 626     // remove selection (WriteText is in fact ReplaceSelection)
 627 #ifdef __WXMSW__
 628     long nLen = pText->GetLastPosition();
 629     pText->SetSelection(nLen, nLen);
 630 #endif // Windows
 631
 632     wxString msg;
 633     TimeStamp(&msg);
 634     msg << szString << wxT('\n');
 635
 636     pText->AppendText(msg);
 637
 638     // TODO ensure that the line can be seen
 639 }
 640
 641 wxFrame *wxLogWindow::GetFrame() const
 642 {
 643     return m_pLogFrame;
 644 }
 645
 646 void wxLogWindow::OnFrameCreate(wxFrame * WXUNUSED(frame))
 647 {
 648 }
 649
 650 bool wxLogWindow::OnFrameClose(wxFrame * WXUNUSED(frame))
 651 {
 652     // allow to close
 653     return TRUE;
 654 }
 655
 656 void wxLogWindow::OnFrameDelete(wxFrame * WXUNUSED(frame))
 657 {
 658     m_pLogFrame = (wxLogFrame *)NULL;
 659 }
 660
 661 wxLogWindow::~wxLogWindow()
 662 {
 663     // may be NULL if log frame already auto destroyed itself
 664     delete m_pLogFrame;
 665 }
 666
 667 // ----------------------------------------------------------------------------
 668 // wxLogDialog
 669 // ----------------------------------------------------------------------------
 670
 671 #if wxUSE_LOG_DIALOG
 672
 673 static const size_t MARGIN = 10;
 674
 675 wxString wxLogDialog::ms_details;
 676
 677 wxLogDialog::wxLogDialog(wxWindow *parent,
 678                          const wxArrayString& messages,
 679                          const wxArrayInt& severity,
 680                          const wxArrayLong& times,
 681                          const wxString& caption,
 682                          long style)
 683            : wxDialog(parent, -1, caption,
 684                       wxDefaultPosition, wxDefaultSize,
 685                       wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
 686 {
 687     if ( ms_details.IsEmpty() )
 688     {
 689         // ensure that we won't loop here if wxGetTranslation()
 690         // happens to pop up a Log message while translating this :-)
 691         ms_details = wxTRANSLATE("&Details");
 692         ms_details = wxGetTranslation(ms_details);
 693     }
 694
 695     size_t count = messages.GetCount();
 696     m_messages.Alloc(count);
 697     m_severity.Alloc(count);
 698     m_times.Alloc(count);
 699
 700     for ( size_t n = 0; n < count; n++ )
 701     {
 702         wxString msg = messages[n];
 703         do
 704         {
 705             m_messages.Add(msg.BeforeFirst(_T('\n')));
 706             msg = msg.AfterFirst(_T('\n'));
 707
 708             m_severity.Add(severity[n]);
 709             m_times.Add(times[n]);
 710         }
 711         while ( !!msg );
 712     }
 713
 714     m_showingDetails = FALSE; // not initially
 715     m_listctrl = (wxListCtrl *)NULL;
 716
 717 #if wxUSE_STATLINE
 718     m_statline = (wxStaticLine *)NULL;
 719 #endif // wxUSE_STATLINE
 720
 721 #if wxUSE_FILE
 722     m_btnSave = (wxButton *)NULL;
 723 #endif // wxUSE_FILE
 724
 725     // create the controls which are always shown and layout them: we use
 726     // sizers even though our window is not resizeable to calculate the size of
 727     // the dialog properly
 728     wxBoxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
 729     wxBoxSizer *sizerButtons = new wxBoxSizer(wxVERTICAL);
 730     wxBoxSizer *sizerAll = new wxBoxSizer(wxHORIZONTAL);
 731
 732     // this "Ok" button has wxID_CANCEL id - not very logical, but this allows
 733     // to close the log dialog with <Esc> which wouldn't work otherwise (as it
 734     // translates into click on cancel button)
 735     wxButton *btnOk = new wxButton(this, wxID_CANCEL, _("OK"));
 736     sizerButtons->Add(btnOk, 0, wxCENTRE | wxBOTTOM, MARGIN/2);
 737     m_btnDetails = new wxButton(this, wxID_MORE, ms_details + EXPAND_SUFFIX);
 738     sizerButtons->Add(m_btnDetails, 0, wxCENTRE | wxTOP, MARGIN/2 - 1);
 739
 740 #ifndef __WIN16__
 741     wxBitmap bitmap;
 742     switch ( style & wxICON_MASK )
 743     {
 744         case wxICON_ERROR:
 745             bitmap = wxArtProvider::GetIcon(wxART_ERROR, wxART_MESSAGE_BOX); break;
 746         case wxICON_INFORMATION:
 747             bitmap = wxArtProvider::GetIcon(wxART_INFORMATION, wxART_MESSAGE_BOX); break;
 748         case wxICON_WARNING:
 749             bitmap = wxArtProvider::GetIcon(wxART_WARNING, wxART_MESSAGE_BOX); break;
 750         default:
 751             wxFAIL_MSG(_T("incorrect log style"));
 752     }
 753     sizerAll->Add(new wxStaticBitmap(this, -1, bitmap), 0);
 754 #endif // !Win16
 755
 756     const wxString& message = messages.Last();
 757     sizerAll->Add(CreateTextSizer(message), 1,
 758                   wxALIGN_CENTRE_VERTICAL | wxLEFT | wxRIGHT, MARGIN);
 759     sizerAll->Add(sizerButtons, 0, wxALIGN_RIGHT | wxLEFT, MARGIN);
 760
 761     sizerTop->Add(sizerAll, 0, wxALL | wxEXPAND, MARGIN);
 762
 763     SetAutoLayout(TRUE);
 764     SetSizer(sizerTop);
 765
 766     sizerTop->SetSizeHints(this);
 767     sizerTop->Fit(this);
 768
 769     btnOk->SetFocus();
 770
 771     // this can't happen any more as we don't use this dialog in this case
 772 #if 0
 773     if ( count == 1 )
 774     {
 775         // no details... it's easier to disable a button than to change the
 776         // dialog layout depending on whether we have details or not
 777         m_btnDetails->Disable();
 778     }
 779 #endif // 0
 780
 781     Centre();
 782 }
 783
 784 void wxLogDialog::CreateDetailsControls()
 785 {
 786     // create the save button and separator line if possible
 787 #if wxUSE_FILE
 788     m_btnSave = new wxButton(this, wxID_SAVE, _("&Save..."));
 789 #endif // wxUSE_FILE
 790
 791 #if wxUSE_STATLINE
 792     m_statline = new wxStaticLine(this, -1);
 793 #endif // wxUSE_STATLINE
 794
 795     // create the list ctrl now
 796     m_listctrl = new wxListCtrl(this, -1,
 797                                 wxDefaultPosition, wxDefaultSize,
 798                                 wxSUNKEN_BORDER |
 799                                 wxLC_REPORT |
 800                                 wxLC_NO_HEADER |
 801                                 wxLC_SINGLE_SEL);
 802
 803     // no need to translate these strings as they're not shown to the
 804     // user anyhow (we use wxLC_NO_HEADER style)
 805     m_listctrl->InsertColumn(0, _T("Message"));
 806     m_listctrl->InsertColumn(1, _T("Time"));
 807
 808     // prepare the imagelist
 809     static const int ICON_SIZE = 16;
 810     wxImageList *imageList = new wxImageList(ICON_SIZE, ICON_SIZE);
 811
 812     // order should be the same as in the switch below!
 813     static const wxChar* icons[] =
 814     {
 815         wxART_ERROR,
 816         wxART_WARNING,
 817         wxART_INFORMATION
 818     };
 819
 820     bool loadedIcons = TRUE;
 821
 822 #ifndef __WIN16__
 823     for ( size_t icon = 0; icon < WXSIZEOF(icons); icon++ )
 824     {
 825         wxBitmap bmp = wxArtProvider::GetBitmap(icons[icon], wxART_MESSAGE_BOX,
 826                                                 wxSize(ICON_SIZE, ICON_SIZE));
 827
 828         // This may very well fail if there are insufficient colours available.
 829         // Degrade gracefully.
 830         if ( !bmp.Ok() )
 831         {
 832             loadedIcons = FALSE;
 833
 834             break;
 835         }
 836
 837         imageList->Add(bmp);
 838     }
 839
 840     m_listctrl->SetImageList(imageList, wxIMAGE_LIST_SMALL);
 841 #endif // !Win16
 842
 843     // and fill it
 844     wxString fmt = wxLog::GetTimestamp();
 845     if ( !fmt )
 846     {
 847         // default format
 848         fmt = _T("%c");
 849     }
 850
 851     size_t count = m_messages.GetCount();
 852     for ( size_t n = 0; n < count; n++ )
 853     {
 854         int image;
 855
 856 #ifndef __WIN16__
 857         if ( loadedIcons )
 858         {
 859             switch ( m_severity[n] )
 860             {
 861                 case wxLOG_Error:
 862                     image = 0;
 863                     break;
 864
 865                 case wxLOG_Warning:
 866                     image = 1;
 867                     break;
 868
 869                 default:
 870                     image = 2;
 871             }
 872         }
 873         else // failed to load images
 874 #endif // !Win16
 875         {
 876             image = -1;
 877         }
 878
 879         m_listctrl->InsertItem(n, m_messages[n], image);
 880         m_listctrl->SetItem(n, 1, TimeStamp(fmt, (time_t)m_times[n]));
 881     }
 882
 883     // let the columns size themselves
 884     m_listctrl->SetColumnWidth(0, wxLIST_AUTOSIZE);
 885     m_listctrl->SetColumnWidth(1, wxLIST_AUTOSIZE);
 886
 887     // calculate an approximately nice height for the listctrl
 888     int height = GetCharHeight()*(count + 4);
 889
 890     // but check that the dialog won't fall fown from the screen
 891     //
 892     // we use GetMinHeight() to get the height of the dialog part without the
 893     // details and we consider that the "Save" button below and the separator
 894     // line (and the margins around it) take about as much, hence double it
 895     int heightMax = wxGetDisplaySize().y - GetPosition().y - 2*GetMinHeight();
 896
 897     // we should leave a margin
 898     heightMax *= 9;
 899     heightMax /= 10;
 900
 901     m_listctrl->SetSize(-1, wxMin(height, heightMax));
 902 }
 903
 904 void wxLogDialog::OnListSelect(wxListEvent& event)
 905 {
 906     // we can't just disable the control because this looks ugly under Windows
 907     // (wrong bg colour, no scrolling...), but we still want to disable
 908     // selecting items - it makes no sense here
 909     m_listctrl->SetItemState(event.GetIndex(), 0, wxLIST_STATE_SELECTED);
 910 }
 911
 912 void wxLogDialog::OnOk(wxCommandEvent& WXUNUSED(event))
 913 {
 914     EndModal(wxID_OK);
 915 }
 916
 917 #if wxUSE_FILE
 918
 919 void wxLogDialog::OnSave(wxCommandEvent& WXUNUSED(event))
 920 {
 921 #if wxUSE_FILEDLG
 922     wxFile file;
 923     int rc = OpenLogFile(file);
 924     if ( rc == -1 )
 925     {
 926         // cancelled
 927         return;
 928     }
 929
 930     bool ok = rc != 0;
 931
 932     wxString fmt = wxLog::GetTimestamp();
 933     if ( !fmt )
 934     {
 935         // default format
 936         fmt = _T("%c");
 937     }
 938
 939     size_t count = m_messages.GetCount();
 940     for ( size_t n = 0; ok && (n < count); n++ )
 941     {
 942         wxString line;
 943         line << TimeStamp(fmt, (time_t)m_times[n])
 944              << _T(": ")
 945              << m_messages[n]
 946              << wxTextFile::GetEOL();
 947
 948         ok = file.Write(line);
 949     }
 950
 951     if ( ok )
 952         ok = file.Close();
 953
 954     if ( !ok )
 955         wxLogError(_("Can't save log contents to file."));
 956 #endif // wxUSE_FILEDLG
 957 }
 958
 959 #endif // wxUSE_FILE
 960
 961 void wxLogDialog::OnDetails(wxCommandEvent& WXUNUSED(event))
 962 {
 963     wxSizer *sizer = GetSizer();
 964
 965     if ( m_showingDetails )
 966     {
 967         m_btnDetails->SetLabel(ms_details + EXPAND_SUFFIX);
 968
 969         sizer->Remove(m_listctrl);
 970
 971 #if wxUSE_STATLINE
 972         sizer->Remove(m_statline);
 973 #endif // wxUSE_STATLINE
 974
 975 #if wxUSE_FILE
 976         sizer->Remove(m_btnSave);
 977 #endif // wxUSE_FILE
 978     }
 979     else // show details now
 980     {
 981         m_btnDetails->SetLabel(wxString(_T("<< ")) + ms_details);
 982
 983         if ( !m_listctrl )
 984         {
 985             CreateDetailsControls();
 986         }
 987
 988 #if wxUSE_STATLINE
 989         sizer->Add(m_statline, 0, wxEXPAND | (wxALL & ~wxTOP), MARGIN);
 990 #endif // wxUSE_STATLINE
 991
 992         sizer->Add(m_listctrl, 1, wxEXPAND | (wxALL & ~wxTOP), MARGIN);
 993
 994         // VZ: this doesn't work as this becomes the initial (and not only
 995         //     minimal) listctrl height as well - why?
 996 #if 0
 997         // allow the user to make the dialog shorter than its initial height -
 998         // without this it wouldn't work as the list ctrl would have been
 999         // incompressible
1000         sizer->SetItemMinSize(m_listctrl, 100, 3*GetCharHeight());
1001 #endif // 0
1002
1003 #if wxUSE_FILE
1004         sizer->Add(m_btnSave, 0, wxALIGN_RIGHT | (wxALL & ~wxTOP), MARGIN);
1005 #endif // wxUSE_FILE
1006     }
1007
1008     m_showingDetails = !m_showingDetails;
1009
1010     // in any case, our size changed - update
1011     sizer->SetSizeHints(this);
1012     sizer->Fit(this);
1013
1014 #ifdef __WXGTK__
1015     // VS: this is neccessary in order to force frame redraw under
1016     // WindowMaker or fvwm2 (and probably other broken WMs).
1017     // Otherwise, detailed list wouldn't be displayed.
1018     Show(TRUE);
1019 #endif // wxGTK
1020 }
1021
1022 wxLogDialog::~wxLogDialog()
1023 {
1024     if ( m_listctrl )
1025     {
1026         delete m_listctrl->GetImageList(wxIMAGE_LIST_SMALL);
1027     }
1028 }
1029
1030 #endif // wxUSE_LOG_DIALOG
1031
1032 #if wxUSE_FILE && wxUSE_FILEDLG
1033
1034 // pass an uninitialized file object, the function will ask the user for the
1035 // filename and try to open it, returns TRUE on success (file was opened),
1036 // FALSE if file couldn't be opened/created and -1 if the file selection
1037 // dialog was cancelled
1038 static int OpenLogFile(wxFile& file, wxString *pFilename)
1039 {
1040     // get the file name
1041     // -----------------
1042     wxString filename = wxSaveFileSelector(wxT("log"), wxT("txt"), wxT("log.txt"));
1043     if ( !filename ) {
1044         // cancelled
1045         return -1;
1046     }
1047
1048     // open file
1049     // ---------
1050     bool bOk = FALSE;
1051     if ( wxFile::Exists(filename) ) {
1052         bool bAppend = FALSE;
1053         wxString strMsg;
1054         strMsg.Printf(_("Append log to file '%s' (choosing [No] will overwrite it)?"),
1055                       filename.c_str());
1056         switch ( wxMessageBox(strMsg, _("Question"),
1057                               wxICON_QUESTION | wxYES_NO | wxCANCEL) ) {
1058             case wxYES:
1059                 bAppend = TRUE;
1060                 break;
1061
1062             case wxNO:
1063                 bAppend = FALSE;
1064                 break;
1065
1066             case wxCANCEL:
1067                 return -1;
1068
1069             default:
1070                 wxFAIL_MSG(_("invalid message box return value"));
1071         }
1072
1073         if ( bAppend ) {
1074             bOk = file.Open(filename, wxFile::write_append);
1075         }
1076         else {
1077             bOk = file.Create(filename, TRUE /* overwrite */);
1078         }
1079     }
1080     else {
1081         bOk = file.Create(filename);
1082     }
1083
1084     if ( pFilename )
1085         *pFilename = filename;
1086
1087     return bOk;
1088 }
1089
1090 #endif // wxUSE_FILE
1091
1092 #endif // !(wxUSE_LOGGUI || wxUSE_LOGWINDOW)
1093
1094 #if wxUSE_TEXTCTRL
1095
1096 // ----------------------------------------------------------------------------
1097 // wxLogTextCtrl implementation
1098 // ----------------------------------------------------------------------------
1099
1100 wxLogTextCtrl::wxLogTextCtrl(wxTextCtrl *pTextCtrl)
1101 {
1102     m_pTextCtrl = pTextCtrl;
1103 }
1104
1105 void wxLogTextCtrl::DoLogString(const wxChar *szString, time_t WXUNUSED(t))
1106 {
1107     wxString msg;
1108     TimeStamp(&msg);
1109
1110 #if defined(__WXMAC__)
1111     // VZ: this is a bug in wxMac, it *must* accept '\n' as new line, the
1112     //     translation must be done in wxTextCtrl, not here! (FIXME)
1113     msg << szString << wxT('\r');
1114 #else
1115     msg << szString << wxT('\n');
1116 #endif
1117
1118     m_pTextCtrl->AppendText(msg);
1119 }
1120
1121 #endif // wxUSE_TEXTCTRL
1122