include/wx/utils.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        utils.h
   3 // Purpose:     Miscellaneous utilities
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_UTILSH__
  13 #define _WX_UTILSH__
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #if defined(__GNUG__) && !defined(__APPLE__)
  20     #pragma interface "utils.h"
  21 #endif
  22
  23 #include "wx/object.h"
  24 #include "wx/list.h"
  25 #include "wx/filefn.h"
  26
  27 // need this for wxGetDiskSpace() as we can't, unfortunately, forward declare
  28 // wxLongLong
  29 #include "wx/longlong.h"
  30
  31 #ifdef __X__
  32     #include <dirent.h>
  33     #include <unistd.h>
  34 #endif
  35
  36 #include <stdio.h>
  37
  38 // ----------------------------------------------------------------------------
  39 // Forward declaration
  40 // ----------------------------------------------------------------------------
  41
  42 class WXDLLEXPORT wxProcess;
  43 class WXDLLEXPORT wxFrame;
  44 class WXDLLEXPORT wxWindow;
  45 class WXDLLEXPORT wxWindowList;
  46 class WXDLLEXPORT wxPoint;
  47
  48 // ----------------------------------------------------------------------------
  49 // Macros
  50 // ----------------------------------------------------------------------------
  51
  52 #define wxMax(a,b)            (((a) > (b)) ? (a) : (b))
  53 #define wxMin(a,b)            (((a) < (b)) ? (a) : (b))
  54
  55 // ----------------------------------------------------------------------------
  56 // String functions (deprecated, use wxString)
  57 // ----------------------------------------------------------------------------
  58
  59 // Useful buffer (FIXME VZ: To be removed!!!)
  60 // Now only needed in Mac and MSW ports
  61 #if !defined(__WXMOTIF__) && !defined(__WXGTK__) && !defined(__WXX11__) && !defined(__WXMGL__)
  62 WXDLLEXPORT_DATA(extern wxChar*) wxBuffer;
  63 #endif
  64
  65 // Make a copy of this string using 'new'
  66 WXDLLEXPORT wxChar* copystring(const wxChar *s);
  67
  68 #if WXWIN_COMPATIBILITY_2
  69 // Matches string one within string two regardless of case
  70 WXDLLEXPORT bool StringMatch(const wxChar *one, const wxChar *two, bool subString = TRUE, bool exact = FALSE);
  71 #endif
  72
  73 // A shorter way of using strcmp
  74 #define wxStringEq(s1, s2) (s1 && s2 && (wxStrcmp(s1, s2) == 0))
  75
  76 // ----------------------------------------------------------------------------
  77 // Miscellaneous functions
  78 // ----------------------------------------------------------------------------
  79
  80 // Sound the bell
  81 WXDLLEXPORT void wxBell();
  82
  83 // Get OS description as a user-readable string
  84 WXDLLEXPORT wxString wxGetOsDescription();
  85
  86 // Get OS version
  87 WXDLLEXPORT int wxGetOsVersion(int *majorVsn = (int *) NULL,
  88                                int *minorVsn = (int *) NULL);
  89
  90 // Return a string with the current date/time
  91 WXDLLEXPORT wxString wxNow();
  92
  93 // Return path where wxWindows is installed (mostly useful in Unices)
  94 WXDLLEXPORT const wxChar *wxGetInstallPrefix();
  95 // Return path to wxWin data (/usr/share/wx/%{version}) (Unices)
  96 WXDLLEXPORT wxString wxGetDataDir();
  97
  98
  99 #if wxUSE_GUI
 100 // Don't synthesize KeyUp events holding down a key and producing
 101 // KeyDown events with autorepeat. On by default and always on
 102 // in wxMSW.
 103 WXDLLEXPORT bool wxSetDetectableAutoRepeat( bool flag );
 104
 105 // ----------------------------------------------------------------------------
 106 // Window ID management
 107 // ----------------------------------------------------------------------------
 108
 109 // Generate a unique ID
 110 WXDLLEXPORT long wxNewId();
 111 #if !defined(NewId) && defined(WXWIN_COMPATIBILITY)
 112     #define NewId wxNewId
 113 #endif
 114
 115 // Ensure subsequent IDs don't clash with this one
 116 WXDLLEXPORT void wxRegisterId(long id);
 117 #if !defined(RegisterId) && defined(WXWIN_COMPATIBILITY)
 118     #define RegisterId wxRegisterId
 119 #endif
 120
 121 // Return the current ID
 122 WXDLLEXPORT long wxGetCurrentId();
 123
 124 #endif // wxUSE_GUI
 125
 126 // ----------------------------------------------------------------------------
 127 // Various conversions
 128 // ----------------------------------------------------------------------------
 129
 130 WXDLLEXPORT_DATA(extern const wxChar*) wxFloatToStringStr;
 131 WXDLLEXPORT_DATA(extern const wxChar*) wxDoubleToStringStr;
 132
 133 WXDLLEXPORT void StringToFloat(const wxChar *s, float *number);
 134 WXDLLEXPORT wxChar* FloatToString(float number, const wxChar *fmt = wxFloatToStringStr);
 135 WXDLLEXPORT void StringToDouble(const wxChar *s, double *number);
 136 WXDLLEXPORT wxChar* DoubleToString(double number, const wxChar *fmt = wxDoubleToStringStr);
 137 WXDLLEXPORT void StringToInt(const wxChar *s, int *number);
 138 WXDLLEXPORT void StringToLong(const wxChar *s, long *number);
 139 WXDLLEXPORT wxChar* IntToString(int number);
 140 WXDLLEXPORT wxChar* LongToString(long number);
 141
 142 // Convert 2-digit hex number to decimal
 143 WXDLLEXPORT int wxHexToDec(const wxString& buf);
 144
 145 // Convert decimal integer to 2-character hex string
 146 WXDLLEXPORT void wxDecToHex(int dec, wxChar *buf);
 147 WXDLLEXPORT wxString wxDecToHex(int dec);
 148
 149 // ----------------------------------------------------------------------------
 150 // Process management
 151 // ----------------------------------------------------------------------------
 152
 153 // NB: for backwars compatibility reasons the values of wxEXEC_[A]SYNC *must*
 154 //     be 0 and 1, don't change!
 155
 156 enum
 157 {
 158     // execute the process asynchronously
 159     wxEXEC_ASYNC    = 0,
 160
 161     // execute it synchronously, i.e. wait until it finishes
 162     wxEXEC_SYNC     = 1,
 163
 164     // under Windows, don't hide the child even if it's IO is redirected (this
 165     // is done by default)
 166     wxEXEC_NOHIDE   = 2,
 167
 168     // under Unix, if the process is the group leader then killing -pid kills
 169     // all children as well as pid
 170     wxEXEC_MAKE_GROUP_LEADER = 4
 171 };
 172
 173 // Execute another program.
 174 //
 175 // If flags contain wxEXEC_SYNC, return -1 on failure and the exit code of the
 176 // process if everything was ok. Otherwise (i.e. if wxEXEC_ASYNC), return 0 on
 177 // failure and the PID of the launched process if ok.
 178 WXDLLEXPORT long wxExecute(wxChar **argv, int flags = wxEXEC_ASYNC,
 179                            wxProcess *process = (wxProcess *) NULL);
 180 WXDLLEXPORT long wxExecute(const wxString& command, int flags = wxEXEC_ASYNC,
 181                            wxProcess *process = (wxProcess *) NULL);
 182
 183 // execute the command capturing its output into an array line by line, this is
 184 // always synchronous
 185 WXDLLEXPORT long wxExecute(const wxString& command,
 186                            wxArrayString& output);
 187
 188 // also capture stderr (also synchronous)
 189 WXDLLEXPORT long wxExecute(const wxString& command,
 190                            wxArrayString& output,
 191                            wxArrayString& error);
 192
 193 enum wxSignal
 194 {
 195     wxSIGNONE = 0,  // verify if the process exists under Unix
 196     wxSIGHUP,
 197     wxSIGINT,
 198     wxSIGQUIT,
 199     wxSIGILL,
 200     wxSIGTRAP,
 201     wxSIGABRT,
 202     wxSIGIOT = wxSIGABRT,   // another name
 203     wxSIGEMT,
 204     wxSIGFPE,
 205     wxSIGKILL,
 206     wxSIGBUS,
 207     wxSIGSEGV,
 208     wxSIGSYS,
 209     wxSIGPIPE,
 210     wxSIGALRM,
 211     wxSIGTERM
 212
 213     // further signals are different in meaning between different Unix systems
 214 };
 215
 216 enum wxKillError
 217 {
 218     wxKILL_OK,              // no error
 219     wxKILL_BAD_SIGNAL,      // no such signal
 220     wxKILL_ACCESS_DENIED,   // permission denied
 221     wxKILL_NO_PROCESS,      // no such process
 222     wxKILL_ERROR            // another, unspecified error
 223 };
 224
 225 enum wxShutdownFlags
 226 {
 227     wxSHUTDOWN_POWEROFF,    // power off the computer
 228     wxSHUTDOWN_REBOOT       // shutdown and reboot
 229 };
 230
 231 // Shutdown or reboot the PC
 232 WXDLLEXPORT bool wxShutdown(wxShutdownFlags wFlags);
 233
 234 // send the given signal to the process (only NONE and KILL are supported under
 235 // Windows, all others mean TERM), return 0 if ok and -1 on error
 236 //
 237 // return detailed error in rc if not NULL
 238 WXDLLEXPORT int wxKill(long pid,
 239                        wxSignal sig = wxSIGTERM,
 240                        wxKillError *rc = NULL);
 241
 242 // Execute a command in an interactive shell window (always synchronously)
 243 // If no command then just the shell
 244 WXDLLEXPORT bool wxShell(const wxString& command = wxEmptyString);
 245
 246 // As wxShell(), but must give a (non interactive) command and its output will
 247 // be returned in output array
 248 WXDLLEXPORT bool wxShell(const wxString& command, wxArrayString& output);
 249
 250 // Sleep for nSecs seconds
 251 WXDLLEXPORT void wxSleep(int nSecs);
 252
 253 // Sleep for a given amount of milliseconds
 254 WXDLLEXPORT void wxUsleep(unsigned long milliseconds);
 255
 256 // Get the process id of the current process
 257 WXDLLEXPORT unsigned long wxGetProcessId();
 258
 259 // Get free memory in bytes, or -1 if cannot determine amount (e.g. on UNIX)
 260 WXDLLEXPORT long wxGetFreeMemory();
 261
 262 // should wxApp::OnFatalException() be called?
 263 WXDLLEXPORT bool wxHandleFatalExceptions(bool doit = TRUE);
 264
 265 // ----------------------------------------------------------------------------
 266 // Environment variables
 267 // ----------------------------------------------------------------------------
 268
 269 // returns TRUE if variable exists (value may be NULL if you just want to check
 270 // for this)
 271 WXDLLEXPORT bool wxGetEnv(const wxString& var, wxString *value);
 272
 273 // set the env var name to the given value, return TRUE on success
 274 WXDLLEXPORT bool wxSetEnv(const wxString& var, const wxChar *value);
 275
 276 // remove the env var from environment
 277 inline bool wxUnsetEnv(const wxString& var) { return wxSetEnv(var, NULL); }
 278
 279 // ----------------------------------------------------------------------------
 280 // Network and username functions.
 281 // ----------------------------------------------------------------------------
 282
 283 // NB: "char *" functions are deprecated, use wxString ones!
 284
 285 // Get eMail address
 286 WXDLLEXPORT bool wxGetEmailAddress(wxChar *buf, int maxSize);
 287 WXDLLEXPORT wxString wxGetEmailAddress();
 288
 289 // Get hostname.
 290 WXDLLEXPORT bool wxGetHostName(wxChar *buf, int maxSize);
 291 WXDLLEXPORT wxString wxGetHostName();
 292
 293 // Get FQDN
 294 WXDLLEXPORT wxString wxGetFullHostName();
 295 WXDLLEXPORT bool wxGetFullHostName(wxChar *buf, int maxSize);
 296
 297 // Get user ID e.g. jacs (this is known as login name under Unix)
 298 WXDLLEXPORT bool wxGetUserId(wxChar *buf, int maxSize);
 299 WXDLLEXPORT wxString wxGetUserId();
 300
 301 // Get user name e.g. Julian Smart
 302 WXDLLEXPORT bool wxGetUserName(wxChar *buf, int maxSize);
 303 WXDLLEXPORT wxString wxGetUserName();
 304
 305 // Get current Home dir and copy to dest (returns pstr->c_str())
 306 WXDLLEXPORT wxString wxGetHomeDir();
 307 WXDLLEXPORT const wxChar* wxGetHomeDir(wxString *pstr);
 308
 309 // Get the user's home dir (caller must copy --- volatile)
 310 // returns NULL is no HOME dir is known
 311 #if defined(__UNIX__) && wxUSE_UNICODE
 312 WXDLLEXPORT const wxMB2WXbuf wxGetUserHome(const wxString& user = wxEmptyString);
 313 #else
 314 WXDLLEXPORT wxChar* wxGetUserHome(const wxString& user = wxEmptyString);
 315 #endif
 316
 317 // get number of total/free bytes on the disk where path belongs
 318 WXDLLEXPORT bool wxGetDiskSpace(const wxString& path,
 319                                 wxLongLong *pTotal = NULL,
 320                                 wxLongLong *pFree = NULL);
 321
 322 #if wxUSE_GUI // GUI only things from now on
 323
 324 // ----------------------------------------------------------------------------
 325 // Menu accelerators related things
 326 // ----------------------------------------------------------------------------
 327
 328 WXDLLEXPORT wxChar* wxStripMenuCodes(const wxChar *in, wxChar *out = (wxChar *) NULL);
 329 WXDLLEXPORT wxString wxStripMenuCodes(const wxString& str);
 330
 331 #if wxUSE_ACCEL
 332 class WXDLLEXPORT wxAcceleratorEntry;
 333 WXDLLEXPORT wxAcceleratorEntry *wxGetAccelFromString(const wxString& label);
 334 #endif // wxUSE_ACCEL
 335
 336 // ----------------------------------------------------------------------------
 337 // Window search
 338 // ----------------------------------------------------------------------------
 339
 340 // Returns menu item id or -1 if none.
 341 WXDLLEXPORT int wxFindMenuItemId(wxFrame *frame, const wxString& menuString, const wxString& itemString);
 342
 343 // Find the wxWindow at the given point. wxGenericFindWindowAtPoint
 344 // is always present but may be less reliable than a native version.
 345 WXDLLEXPORT wxWindow* wxGenericFindWindowAtPoint(const wxPoint& pt);
 346 WXDLLEXPORT wxWindow* wxFindWindowAtPoint(const wxPoint& pt);
 347
 348 // NB: this function is obsolete, use wxWindow::FindWindowByLabel() instead
 349 //
 350 // Find the window/widget with the given title or label.
 351 // Pass a parent to begin the search from, or NULL to look through
 352 // all windows.
 353 WXDLLEXPORT wxWindow* wxFindWindowByLabel(const wxString& title, wxWindow *parent = (wxWindow *) NULL);
 354
 355 // NB: this function is obsolete, use wxWindow::FindWindowByName() instead
 356 //
 357 // Find window by name, and if that fails, by label.
 358 WXDLLEXPORT wxWindow* wxFindWindowByName(const wxString& name, wxWindow *parent = (wxWindow *) NULL);
 359
 360 // ----------------------------------------------------------------------------
 361 // Message/event queue helpers
 362 // ----------------------------------------------------------------------------
 363
 364 // NB: these functions are obsolete, please use wxApp methods instead!
 365
 366 // Yield to other apps/messages
 367 WXDLLEXPORT bool wxYield();
 368
 369 // Like wxYield, but fails silently if the yield is recursive.
 370 WXDLLEXPORT bool wxYieldIfNeeded();
 371
 372 // Yield to other apps/messages and disable user input
 373 WXDLLEXPORT bool wxSafeYield(wxWindow *win = NULL, bool onlyIfNeeded = FALSE);
 374
 375 // Enable or disable input to all top level windows
 376 WXDLLEXPORT void wxEnableTopLevelWindows(bool enable = TRUE);
 377
 378 // Check whether this window wants to process messages, e.g. Stop button
 379 // in long calculations.
 380 WXDLLEXPORT bool wxCheckForInterrupt(wxWindow *wnd);
 381
 382 // Consume all events until no more left
 383 WXDLLEXPORT void wxFlushEvents();
 384
 385 // a class which disables all windows (except, may be, thegiven one) in its
 386 // ctor and enables them back in its dtor
 387 class WXDLLEXPORT wxWindowDisabler
 388 {
 389 public:
 390     wxWindowDisabler(wxWindow *winToSkip = (wxWindow *)NULL);
 391     ~wxWindowDisabler();
 392
 393 private:
 394     wxWindowList *m_winDisabled;
 395
 396     DECLARE_NO_COPY_CLASS(wxWindowDisabler)
 397 };
 398
 399 // ----------------------------------------------------------------------------
 400 // Cursors
 401 // ----------------------------------------------------------------------------
 402
 403 // Set the cursor to the busy cursor for all windows
 404 class WXDLLEXPORT wxCursor;
 405 WXDLLEXPORT_DATA(extern wxCursor*) wxHOURGLASS_CURSOR;
 406 WXDLLEXPORT void wxBeginBusyCursor(wxCursor *cursor = wxHOURGLASS_CURSOR);
 407
 408 // Restore cursor to normal
 409 WXDLLEXPORT void wxEndBusyCursor();
 410
 411 // TRUE if we're between the above two calls
 412 WXDLLEXPORT bool wxIsBusy();
 413
 414 // Convenience class so we can just create a wxBusyCursor object on the stack
 415 class WXDLLEXPORT wxBusyCursor
 416 {
 417 public:
 418     wxBusyCursor(wxCursor* cursor = wxHOURGLASS_CURSOR)
 419         { wxBeginBusyCursor(cursor); }
 420     ~wxBusyCursor()
 421         { wxEndBusyCursor(); }
 422
 423     // FIXME: These two methods are currently only implemented (and needed?)
 424     //        in wxGTK.  BusyCursor handling should probably be moved to
 425     //        common code since the wxGTK and wxMSW implementations are very
 426     //        similar except for wxMSW using HCURSOR directly instead of
 427     //        wxCursor..  -- RL.
 428     static const wxCursor &GetStoredCursor();
 429     static const wxCursor GetBusyCursor();
 430 };
 431
 432
 433 // ----------------------------------------------------------------------------
 434 // Reading and writing resources (eg WIN.INI, .Xdefaults)
 435 // ----------------------------------------------------------------------------
 436
 437 #if wxUSE_RESOURCES
 438 WXDLLEXPORT bool wxWriteResource(const wxString& section, const wxString& entry, const wxString& value, const wxString& file = wxEmptyString);
 439 WXDLLEXPORT bool wxWriteResource(const wxString& section, const wxString& entry, float value, const wxString& file = wxEmptyString);
 440 WXDLLEXPORT bool wxWriteResource(const wxString& section, const wxString& entry, long value, const wxString& file = wxEmptyString);
 441 WXDLLEXPORT bool wxWriteResource(const wxString& section, const wxString& entry, int value, const wxString& file = wxEmptyString);
 442
 443 WXDLLEXPORT bool wxGetResource(const wxString& section, const wxString& entry, wxChar **value, const wxString& file = wxEmptyString);
 444 WXDLLEXPORT bool wxGetResource(const wxString& section, const wxString& entry, float *value, const wxString& file = wxEmptyString);
 445 WXDLLEXPORT bool wxGetResource(const wxString& section, const wxString& entry, long *value, const wxString& file = wxEmptyString);
 446 WXDLLEXPORT bool wxGetResource(const wxString& section, const wxString& entry, int *value, const wxString& file = wxEmptyString);
 447 #endif // wxUSE_RESOURCES
 448
 449 void WXDLLEXPORT wxGetMousePosition( int* x, int* y );
 450
 451 // MSW only: get user-defined resource from the .res file.
 452 // Returns NULL or newly-allocated memory, so use delete[] to clean up.
 453 #ifdef __WXMSW__
 454     WXDLLEXPORT extern const wxChar* wxUserResourceStr;
 455     WXDLLEXPORT wxChar* wxLoadUserResource(const wxString& resourceName, const wxString& resourceType = wxUserResourceStr);
 456 #endif // MSW
 457
 458 // ----------------------------------------------------------------------------
 459 // Display and colorss (X only)
 460 // ----------------------------------------------------------------------------
 461
 462 #ifdef __WXGTK__
 463     void *wxGetDisplay();
 464 #endif
 465
 466 #ifdef __X__
 467     WXDisplay *wxGetDisplay();
 468     bool wxSetDisplay(const wxString& display_name);
 469     wxString wxGetDisplayName();
 470 #endif // X or GTK+
 471
 472 #ifdef __X__
 473
 474 #ifdef __VMS__ // Xlib.h for VMS is not (yet) compatible with C++
 475                // The resulting warnings are switched off here
 476 #pragma message disable nosimpint
 477 #endif
 478 // #include <X11/Xlib.h>
 479 #ifdef __VMS__
 480 #pragma message enable nosimpint
 481 #endif
 482
 483 #endif //__X__
 484
 485 #endif // wxUSE_GUI
 486
 487 // ----------------------------------------------------------------------------
 488 // Error message functions used by wxWindows (deprecated, use wxLog)
 489 // ----------------------------------------------------------------------------
 490
 491 #if WXWIN_COMPATIBILITY_2_2
 492
 493 // Format a message on the standard error (UNIX) or the debugging
 494 // stream (Windows)
 495 WXDLLEXPORT void wxDebugMsg(const wxChar *fmt ...) ATTRIBUTE_PRINTF_1;
 496
 497 // Non-fatal error (continues)
 498 WXDLLEXPORT_DATA(extern const wxChar*) wxInternalErrorStr;
 499 WXDLLEXPORT void wxError(const wxString& msg, const wxString& title = wxInternalErrorStr);
 500
 501 // Fatal error (exits)
 502 WXDLLEXPORT_DATA(extern const wxChar*) wxFatalErrorStr;
 503 WXDLLEXPORT void wxFatalError(const wxString& msg, const wxString& title = wxFatalErrorStr);
 504
 505 #endif // WXWIN_COMPATIBILITY_2_2
 506
 507 #endif
 508     // _WX_UTILSH__