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