///////////////////////////////////////////////////////////////////////////// // Name: utils.h // Purpose: interface of various utility classes and functions // Author: wxWidgets team // RCS-ID: $Id$ // Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// /** @class wxWindowDisabler This class disables all windows of the application (may be with the exception of one of them) in its constructor and enables them back in its destructor. This is useful when you want to indicate to the user that the application is currently busy and cannot respond to user input. @library{wxcore} @category{misc} @see wxBusyCursor */ class wxWindowDisabler { public: /** Disables all top level windows of the applications. If @a disable is @c false nothing is done. This can be convenient if the windows should be disabled depending on some condition. @since 2.9.0 */ wxWindowDisabler(bool disable = true); /** Disables all top level windows of the applications with the exception of @a winToSkip if it is not @NULL. */ wxWindowDisabler(wxWindow* winToSkip); /** Reenables the windows disabled by the constructor. */ ~wxWindowDisabler(); }; /** @class wxBusyCursor This class makes it easy to tell your user that the program is temporarily busy. Just create a wxBusyCursor object on the stack, and within the current scope, the hourglass will be shown. For example: @code wxBusyCursor wait; for (int i = 0; i < 100000; i++) DoACalculation(); @endcode It works by calling wxBeginBusyCursor() in the constructor, and wxEndBusyCursor() in the destructor. @library{wxcore} @category{misc} @see wxBeginBusyCursor(), wxEndBusyCursor(), wxWindowDisabler */ class wxBusyCursor { public: /** Constructs a busy cursor object, calling wxBeginBusyCursor(). */ wxBusyCursor(const wxCursor* cursor = wxHOURGLASS_CURSOR); /** Destroys the busy cursor object, calling wxEndBusyCursor(). */ ~wxBusyCursor(); }; // ============================================================================ // Global functions/macros // ============================================================================ /** @ingroup group_funcmacro_dialog */ //@{ /** Changes the cursor to the given cursor for all windows in the application. Use wxEndBusyCursor() to revert the cursor back to its previous state. These two calls can be nested, and a counter ensures that only the outer calls take effect. @see wxIsBusy(), wxBusyCursor @header{wx/utils.h} */ void wxBeginBusyCursor(wxCursor* cursor = wxHOURGLASS_CURSOR); /** Changes the cursor back to the original cursor, for all windows in the application. Use with wxBeginBusyCursor(). @see wxIsBusy(), wxBusyCursor @header{wx/utils.h} */ void wxEndBusyCursor(); /** Returns @true if between two wxBeginBusyCursor() and wxEndBusyCursor() calls. @see wxBusyCursor. @header{wx/utils.h} */ bool wxIsBusy(); /** Ring the system bell. @note This function is categorized as a GUI one and so is not thread-safe. @header{wx/utils.h} */ void wxBell(); /** Shows a message box with the information about the wxWidgets build used, including its version, most important build parameters and the version of the underlying GUI toolkit. This is mainly used for diagnostic purposes and can be invoked by Ctrl-Alt-middle clicking on any wxWindow which doesn't otherwise handle this event. @since 2.9.0 @header{wx/utils.h} */ void wxInfoMessageBox(wxWindow parent = NULL); //@} /** @ingroup group_funcmacro_env */ //@{ /** This is a macro defined as @c getenv() or its wide char version in Unicode mode. Note that under Win32 it may not return correct value for the variables set with wxSetEnv(), use wxGetEnv() function instead. @header{wx/utils.h} */ wxChar* wxGetenv(const wxString& var); /** Returns the current value of the environment variable @c var in @c value. @c value may be @NULL if you just want to know if the variable exists and are not interested in its value. Returns @true if the variable exists, @false otherwise. @header{wx/utils.h} */ bool wxGetEnv(const wxString& var, wxString* value); /** Sets the value of the environment variable @c var (adding it if necessary) to @c value. Returns @true on success. @see wxUnsetEnv() @header{wx/utils.h} */ bool wxSetEnv(const wxString& var, const wxString& value); /** Removes the variable @c var from the environment. wxGetEnv() will return @NULL after the call to this function. Returns @true on success. @header{wx/utils.h} */ bool wxUnsetEnv(const wxString& var); //@} /** @ingroup group_funcmacro_misc */ //@{ /** Returns battery state as one of @c wxBATTERY_NORMAL_STATE, @c wxBATTERY_LOW_STATE, @c wxBATTERY_CRITICAL_STATE, @c wxBATTERY_SHUTDOWN_STATE or @c wxBATTERY_UNKNOWN_STATE. @c wxBATTERY_UNKNOWN_STATE is also the default on platforms where this feature is not implemented (currently everywhere but MS Windows). @header{wx/utils.h} */ wxBatteryState wxGetBatteryState(); /** Returns the type of power source as one of @c wxPOWER_SOCKET, @c wxPOWER_BATTERY or @c wxPOWER_UNKNOWN. @c wxPOWER_UNKNOWN is also the default on platforms where this feature is not implemented (currently everywhere but MS Windows). @header{wx/utils.h} */ wxPowerType wxGetPowerType(); /** Under X only, returns the current display name. @see wxSetDisplayName() @header{wx/utils.h} */ wxString wxGetDisplayName(); /** For normal keys, returns @true if the specified key is currently down. For togglable keys (Caps Lock, Num Lock and Scroll Lock), returns @true if the key is toggled such that its LED indicator is lit. There is currently no way to test whether togglable keys are up or down. Even though there are virtual key codes defined for mouse buttons, they cannot be used with this function currently. @header{wx/utils.h} */ bool wxGetKeyState(wxKeyCode key); /** Returns the mouse position in screen coordinates. @header{wx/utils.h} */ wxPoint wxGetMousePosition(); /** Returns the current state of the mouse. Returns a wxMouseState instance that contains the current position of the mouse pointer in screen coordinates, as well as boolean values indicating the up/down status of the mouse buttons and the modifier keys. @header{wx/utils.h} */ wxMouseState wxGetMouseState(); /** This function enables or disables all top level windows. It is used by wxSafeYield(). @header{wx/utils.h} */ void wxEnableTopLevelWindows(bool enable = true); /** Find the deepest window at the given mouse position in screen coordinates, returning the window if found, or @NULL if not. @header{wx/utils.h} */ wxWindow* wxFindWindowAtPoint(const wxPoint& pt); /** @deprecated Replaced by wxWindow::FindWindowByLabel(). Find a window by its label. Depending on the type of window, the label may be a window title or panel item label. If @a parent is @NULL, the search will start from all top-level frames and dialog boxes; if non-@NULL, the search will be limited to the given window hierarchy. The search is recursive in both cases. @header{wx/utils.h} */ wxWindow* wxFindWindowByLabel(const wxString& label, wxWindow* parent = NULL); /** @deprecated Replaced by wxWindow::FindWindowByName(). Find a window by its name (as given in a window constructor or @e Create function call). If @a parent is @NULL, the search will start from all top-level frames and dialog boxes; if non-@NULL, the search will be limited to the given window hierarchy. The search is recursive in both cases. If no such named window is found, wxFindWindowByLabel() is called. @header{wx/utils.h} */ wxWindow* wxFindWindowByName(const wxString& name, wxWindow* parent = NULL); /** Find a menu item identifier associated with the given frame's menu bar. @header{wx/utils.h} */ int wxFindMenuItemId(wxFrame* frame, const wxString& menuString, const wxString& itemString); /** @deprecated Ids generated by it can conflict with the Ids defined by the user code, use @c wxID_ANY to assign ids which are guaranteed to not conflict with the user-defined ids for the controls and menu items you create instead of using this function. Generates an integer identifier unique to this run of the program. @header{wx/utils.h} */ long wxNewId(); /** Ensures that Ids subsequently generated by wxNewId() do not clash with the given @a id. @header{wx/utils.h} */ void wxRegisterId(long id); /** Opens the @a document in the application associated with the files of this type. The @a flags parameter is currently not used Returns @true if the application was successfully launched. @header{wx/utils.h} */ bool wxLaunchDefaultApplication(const wxString& document, int flags = 0) /** Opens the @a url in user's default browser. If the @a flags parameter contains @c wxBROWSER_NEW_WINDOW flag, a new window is opened for the URL (currently this is only supported under Windows). And unless the @a flags parameter contains @c wxBROWSER_NOBUSYCURSOR flag, a busy cursor is shown while the browser is being launched (using wxBusyCursor). The @a url may also be a local file path (with or without the "file://" prefix), if it doesn't correspond to an existing file and the URL has no scheme "http://" is prepended to it by default. Returns @true if the application was successfully launched. @note For some configurations of the running user, the application which is launched to open the given URL may be URL-dependent (e.g. a browser may be used for local URLs while another one may be used for remote URLs). @header{wx/utils.h} */ bool wxLaunchDefaultBrowser(const wxString& url, int flags = 0); /** Loads a user-defined Windows resource as a string. If the resource is found, the function creates a new character array and copies the data into it. A pointer to this data is returned. If unsuccessful, @NULL is returned. The resource must be defined in the @c .rc file using the following syntax: @code myResource TEXT file.ext @endcode Where @c file.ext is a file that the resource compiler can find. This function is available under Windows only. @header{wx/utils.h} */ wxString wxLoadUserResource(const wxString& resourceName, const wxString& resourceType = "TEXT"); /** @deprecated Replaced by wxWindow::Close(). See the @ref overview_windowdeletion "window deletion overview". Tells the system to delete the specified object when all other events have been processed. In some environments, it is necessary to use this instead of deleting a frame directly with the delete operator, because some GUIs will still send events to a deleted window. @header{wx/utils.h} */ void wxPostDelete(wxObject* object); /** Under X only, sets the current display name. This is the X host and display name such as "colonsay:0.0", and the function indicates which display should be used for creating windows from this point on. Setting the display within an application allows multiple displays to be used. @see wxGetDisplayName() @header{wx/utils.h} */ void wxSetDisplayName(const wxString& displayName); /** Strips any menu codes from @a str and returns the result. By default, the functions strips both the mnemonics character (@c '&') which is used to indicate a keyboard shortkey, and the accelerators, which are used only in the menu items and are separated from the main text by the @c \\t (TAB) character. By using @a flags of @c wxStrip_Mnemonics or @c wxStrip_Accel to strip only the former or the latter part, respectively. Notice that in most cases wxMenuItem::GetLabelFromText() or wxControl::GetLabelText() can be used instead. @header{wx/utils.h} */ wxString wxStripMenuCodes(const wxString& str, int flags = wxStrip_All); //@} /** @ingroup group_funcmacro_networkuseros */ //@{ /** Copies the user's email address into the supplied buffer, by concatenating the values returned by wxGetFullHostName() and wxGetUserId(). @return @true if successful, @false otherwise. @header{wx/utils.h} */ wxString wxGetEmailAddress(); /** @deprecated Use wxGetEmailAddress() instead. @param buf Buffer to store the email address in. @param sz Size of the buffer. @return @true if successful, @false otherwise. @header{wx/utils.h} */ bool wxGetEmailAddress(char* buf, int sz); /** Returns the amount of free memory in bytes under environments which support it, and -1 if not supported or failed to perform measurement. @header{wx/utils.h} */ wxMemorySize wxGetFreeMemory(); /** Return the (current) user's home directory. @see wxGetUserHome(), wxStandardPaths @header{wx/utils.h} */ wxString wxGetHomeDir(); /** Copies the current host machine's name into the supplied buffer. Please note that the returned name is @e not fully qualified, i.e. it does not include the domain name. Under Windows or NT, this function first looks in the environment variable SYSTEM_NAME; if this is not found, the entry @b HostName in the wxWidgets section of the WIN.INI file is tried. @return The hostname if successful or an empty string otherwise. @see wxGetFullHostName() @header{wx/utils.h} */ wxString wxGetHostName(); /** @deprecated Use wxGetHostName() instead. @param buf Buffer to store the host name in. @param sz Size of the buffer. @return @true if successful, @false otherwise. @header{wx/utils.h} */ bool wxGetHostName(char* buf, int sz); /** Returns the FQDN (fully qualified domain host name) or an empty string on error. @see wxGetHostName() @header{wx/utils.h} */ wxString wxGetFullHostName(); /** Returns the home directory for the given user. If the @a user is empty (default value), this function behaves like wxGetHomeDir() (i.e. returns the current user home directory). If the home directory couldn't be determined, an empty string is returned. @header{wx/utils.h} */ wxString wxGetUserHome(const wxString& user = ""); /** This function returns the "user id" also known as "login name" under Unix (i.e. something like "jsmith"). It uniquely identifies the current user (on this system). Under Windows or NT, this function first looks in the environment variables USER and LOGNAME; if neither of these is found, the entry @b UserId in the @b wxWidgets section of the WIN.INI file is tried. @return The login name if successful or an empty string otherwise. @see wxGetUserName() @header{wx/utils.h} */ wxString wxGetUserId(); /** @deprecated Use wxGetUserId() instead. @param buf Buffer to store the login name in. @param sz Size of the buffer. @return @true if successful, @false otherwise. @header{wx/utils.h} */ bool wxGetUserId(char* buf, int sz); /** This function returns the full user name (something like "Mr. John Smith"). Under Windows or NT, this function looks for the entry UserName in the wxWidgets section of the WIN.INI file. If PenWindows is running, the entry Current in the section User of the PENWIN.INI file is used. @return The full user name if successful or an empty string otherwise. @see wxGetUserId() @header{wx/utils.h} */ wxString wxGetUserName(); /** @deprecated Use wxGetUserName() instead. @param buf Buffer to store the full user name in. @param sz Size of the buffer. @return @true if successful, @false otherwise. @header{wx/utils.h} */ bool wxGetUserName(char* buf, int sz); /** Returns the string containing the description of the current platform in a user-readable form. For example, this function may return strings like "Windows NT Version 4.0" or "Linux 2.2.2 i386". @see wxGetOsVersion() @header{wx/utils.h} */ wxString wxGetOsDescription(); /** Gets the version and the operating system ID for currently running OS. See wxPlatformInfo for more details about wxOperatingSystemId. @see wxGetOsDescription(), wxPlatformInfo @header{wx/utils.h} */ wxOperatingSystemId wxGetOsVersion(int* major = NULL, int* minor = NULL); /** Returns @true if the operating system the program is running under is 64 bit. The check is performed at run-time and may differ from the value available at compile-time (at compile-time you can just check if sizeof(void*) == 8) since the program could be running in emulation mode or in a mixed 32/64 bit system (bi-architecture operating system). @note This function is not 100% reliable on some systems given the fact that there isn't always a standard way to do a reliable check on the OS architecture. @header{wx/utils.h} */ bool wxIsPlatform64Bit(); /** Returns @true if the current platform is little endian (instead of big endian). The check is performed at run-time. @see @ref group_funcmacro_byteorder "Byte Order Functions and Macros" @header{wx/utils.h} */ bool wxIsPlatformLittleEndian(); //@} /** @ingroup group_funcmacro_procctrl */ //@{ /** Executes another program in Unix or Windows. In the overloaded versions of this function, if @a flags parameter contains @c wxEXEC_ASYNC flag (the default), flow of control immediately returns. If it contains @c wxEXEC_SYNC, the current application waits until the other program has terminated. In the case of synchronous execution, the return value is the exit code of the process (which terminates by the moment the function returns) and will be -1 if the process couldn't be started and typically 0 if the process terminated successfully. Also, while waiting for the process to terminate, wxExecute() will call wxYield(). Because of this, by default this function disables all application windows to avoid unexpected reentrancies which could result from the users interaction with the program while the child process is running. If you are sure that it is safe to not disable the program windows, you may pass @c wxEXEC_NODISABLE flag to prevent this automatic disabling from happening. For asynchronous execution, however, the return value is the process id and zero value indicates that the command could not be executed. As an added complication, the return value of -1 in this case indicates that we didn't launch a new process, but connected to the running one (this can only happen when using DDE under Windows for command execution). In particular, in this case only, the calling code will not get the notification about process termination. If @a callback isn't @NULL and if execution is asynchronous, wxProcess::OnTerminate() will be called when the process finishes. Specifying this parameter also allows you to redirect the standard input and/or output of the process being launched by calling wxProcess::Redirect(). If the child process IO is redirected, under Windows the process window is not shown by default (this avoids having to flush an unnecessary console for the processes which don't create any windows anyhow) but a @c wxEXEC_NOHIDE flag can be used to prevent this from happening, i.e. with this flag the child process window will be shown normally. Under Unix the flag @c wxEXEC_MAKE_GROUP_LEADER may be used to ensure that the new process is a group leader (this will create a new session if needed). Calling wxKill() passing wxKILL_CHILDREN will kill this process as well as all of its children (except those which have started their own session). The @c wxEXEC_NOEVENTS flag prevents processing of any events from taking place while the child process is running. It should be only used for very short-lived processes as otherwise the application windows risk becoming unresponsive from the users point of view. As this flag only makes sense with @c wxEXEC_SYNC, @c wxEXEC_BLOCK equal to the sum of both of these flags is provided as a convenience. @note Currently wxExecute() can only be used from the main thread, calling this function from another thread will result in an assert failure in debug build and won't work. @param command The command to execute and any parameters to pass to it as a single string, i.e. "emacs file.txt". @param flags Must include either wxEXEC_ASYNC or wxEXEC_SYNC and can also include wxEXEC_NOHIDE, wxEXEC_MAKE_GROUP_LEADER (in either case) or wxEXEC_NODISABLE and wxEXEC_NOEVENTS or wxEXEC_BLOCK, which is equal to their combination, in wxEXEC_SYNC case. @param callback An optional pointer to wxProcess. @see wxShell(), wxProcess, @ref page_samples_exec @header{wx/utils.h} @beginWxPerlOnly This function is called @c Wx::ExecuteStdoutStderr and it only takes the @a command argument, and returns a 3-element list (@c status, @c output, @c errors), where @c output and @c errors are array references. @endWxPerlOnly */ long wxExecute(const wxString& command, int flags = wxEXEC_ASYNC, wxProcess* callback = NULL); //@} /** @ingroup group_funcmacro_procctrl */ //@{ /** This is an overloaded version of wxExecute(const wxString&,int,wxProcess*), please see its documentation for general information. This version takes an array of values: a command, any number of arguments, terminated by @NULL. @param argv The command to execute should be the first element of this array, any additional ones are the command parameters and the array must be terminated with a @NULL pointer. @param flags Must include either wxEXEC_ASYNC or wxEXEC_SYNC and can also include wxEXEC_NOHIDE, wxEXEC_MAKE_GROUP_LEADER (in either case) or wxEXEC_NODISABLE and wxEXEC_NOEVENTS or wxEXEC_BLOCK, which is equal to their combination, in wxEXEC_SYNC case. @param callback An optional pointer to wxProcess. @header{wx/utils.h} */ long wxExecute(char** argv, int flags = wxEXEC_ASYNC, wxProcess* callback = NULL); long wxExecute(wchar_t** argv, int flags = wxEXEC_ASYNC, wxProcess* callback = NULL); //@} /** @ingroup group_funcmacro_procctrl */ //@{ /** This is an overloaded version of wxExecute(const wxString&,int,wxProcess*), please see its documentation for general information. This version can be used to execute a process (always synchronously, the contents of @a flags is or'd with @c wxEXEC_SYNC) and capture its output in the array @e output. @param command The command to execute and any parameters to pass to it as a single string. @param flags Must include either wxEXEC_ASYNC or wxEXEC_SYNC and can also include wxEXEC_NOHIDE, wxEXEC_MAKE_GROUP_LEADER (in either case) or wxEXEC_NODISABLE and wxEXEC_NOEVENTS or wxEXEC_BLOCK, which is equal to their combination, in wxEXEC_SYNC case. @header{wx/utils.h} */ long wxExecute(const wxString& command, wxArrayString& output, int flags = 0); /** This is an overloaded version of wxExecute(const wxString&,int,wxProcess*), please see its documentation for general information. This version adds the possibility to additionally capture the messages from standard error output in the @a errors array. @param command The command to execute and any parameters to pass to it as a single string. @param flags Must include either wxEXEC_ASYNC or wxEXEC_SYNC and can also include wxEXEC_NOHIDE, wxEXEC_MAKE_GROUP_LEADER (in either case) or wxEXEC_NODISABLE and wxEXEC_NOEVENTS or wxEXEC_BLOCK, which is equal to their combination, in wxEXEC_SYNC case. @header{wx/utils.h} */ long wxExecute(const wxString& command, wxArrayString& output, wxArrayString& errors, int flags = 0); /** Returns the number uniquely identifying the current process in the system. If an error occurs, 0 is returned. @header{wx/utils.h} */ unsigned long wxGetProcessId(); /** Equivalent to the Unix kill function: send the given signal @a sig to the process with PID @a pid. The valid signal values are: @code enum wxSignal { wxSIGNONE = 0, // verify if the process exists under Unix wxSIGHUP, wxSIGINT, wxSIGQUIT, wxSIGILL, wxSIGTRAP, wxSIGABRT, wxSIGEMT, wxSIGFPE, wxSIGKILL, // forcefully kill, dangerous! wxSIGBUS, wxSIGSEGV, wxSIGSYS, wxSIGPIPE, wxSIGALRM, wxSIGTERM // terminate the process gently }; @endcode @c wxSIGNONE, @c wxSIGKILL and @c wxSIGTERM have the same meaning under both Unix and Windows but all the other signals are equivalent to @c wxSIGTERM under Windows. Returns 0 on success, -1 on failure. If the @a rc parameter is not @NULL, it will be filled with a value of the the @c wxKillError enum: @code enum wxKillError { wxKILL_OK, // no error wxKILL_BAD_SIGNAL, // no such signal wxKILL_ACCESS_DENIED, // permission denied wxKILL_NO_PROCESS, // no such process wxKILL_ERROR // another, unspecified error }; @endcode The @a flags parameter can be wxKILL_NOCHILDREN (the default), or wxKILL_CHILDREN, in which case the child processes of this process will be killed too. Note that under Unix, for wxKILL_CHILDREN to work you should have created the process by passing wxEXEC_MAKE_GROUP_LEADER to wxExecute(). @see wxProcess::Kill(), wxProcess::Exists(), @ref page_samples_exec @header{wx/utils.h} */ int wxKill(long pid, int sig = wxSIGTERM, wxKillError rc = NULL, int flags = 0); /** Executes a command in an interactive shell window. If no command is specified, then just the shell is spawned. @see wxExecute(), @ref page_samples_exec @header{wx/utils.h} */ bool wxShell(const wxString& command = NULL); /** This function shuts down or reboots the computer depending on the value of the @a flags. @note Note that performing the shutdown requires the corresponding access rights (superuser under Unix, SE_SHUTDOWN privilege under Windows NT) and that this function is only implemented under Unix and MSW. @param flags One of @c wxSHUTDOWN_POWEROFF, @c wxSHUTDOWN_REBOOT or @c wxSHUTDOWN_LOGOFF (currently implemented only for MSW) possibly combined with @c wxSHUTDOWN_FORCE which forces shutdown under MSW by forcefully terminating all the applications. As doing this can result in a data loss, this flag shouldn't be used unless really necessary. @return @true on success, @false if an error occurred. @header{wx/utils.h} */ bool wxShutdown(int flags = wxSHUTDOWN_POWEROFF); //@} /** @ingroup group_funcmacro_time */ //@{ /** Sleeps for the specified number of microseconds. The microsecond resolution may not, in fact, be available on all platforms (currently only Unix platforms with nanosleep(2) may provide it) in which case this is the same as calling wxMilliSleep() with the argument of @e microseconds/1000. @header{wx/utils.h} */ void wxMicroSleep(unsigned long microseconds); /** Sleeps for the specified number of milliseconds. Notice that usage of this function is encouraged instead of calling usleep(3) directly because the standard @e usleep() function is not MT safe. @header{wx/utils.h} */ void wxMilliSleep(unsigned long milliseconds); /** Returns a string representing the current date and time. @header{wx/utils.h} */ wxString wxNow(); /** Sleeps for the specified number of seconds. @header{wx/utils.h} */ void wxSleep(int secs); /** @deprecated This function is deprecated because its name is misleading: notice that the argument is in milliseconds, not microseconds. Please use either wxMilliSleep() or wxMicroSleep() depending on the resolution you need. Sleeps for the specified number of milliseconds. @header{wx/utils.h} */ void wxUsleep(unsigned long milliseconds); //@}