Linux Manuals session 3

XtAppNextEvent, XtAppPending, XtAppPeekEvent, XtAppProcessEvent, XtDispatchEvent, XtAppMainLoop – query and process events and input Syntax #include <X11/Intrinsic.h> void XtAppNextEvent(XtAppContext app_context, XEvent *event_return); Boolean XtAppPeekEvent(XtAppContext app_context, XEvent *event_return); XtInputMask XtAppPending(XtAppContext app_context); void XtAppProcessEvent(XtAppContext app_context, XtInputMask mask); Boolean XtDispatchEvent(XEvent *event); void XtAppMainLoop(XtAppContext app_context); Arguments app_context Specifies the application context that identifies the application. event Specifies a pointer to…

XtAppNextEvent, XtAppPending, XtAppPeekEvent, XtAppProcessEvent, XtDispatchEvent, XtAppMainLoop – query and process events and input Syntax #include <X11/Intrinsic.h> void XtAppNextEvent(XtAppContext app_context, XEvent *event_return); Boolean XtAppPeekEvent(XtAppContext app_context, XEvent *event_return); XtInputMask XtAppPending(XtAppContext app_context); void XtAppProcessEvent(XtAppContext app_context, XtInputMask mask); Boolean XtDispatchEvent(XEvent *event); void XtAppMainLoop(XtAppContext app_context); Arguments app_context Specifies the application context that identifies the application. event Specifies a pointer to…

XtAppLock, XtAppUnlock – lock and unlock application context Syntax #include <X11/Intrinsic.h> void XtAppLock(XtAppContext app_context); void XtAppUnlock(XtAppContext app_context); Arguments app_context Specifies the application context. Description XtAppLock locks the application context including all its related displays and widgets. XtAppUnlock unlocks the application context. See Also X Toolkit Intrinsics – C Language Interface Xlib – C Language X…

XtAppInitialize, XtVaAppInitialize – initialize, open, or close a display Syntax #include <X11/Intrinsic.h> Widget XtAppInitialize(XtAppContext* app_context_return, const char *application_class, XrmOptionDescRec* options, Cardinal num_options, int *argc_in_out, char **argv_in_out, String *fallback_resources, ArgList args, Cardinal num_args); Widget XtVaAppInitialize(XtAppContext* app_context_return, const char *application_class, XrmOptionDescRec* options, Cardinal num_options, int *argc_in_out, char **argv_in_out, String *fallback_resources, …); Arguments app_context_return Specifies the application context….

XtAppGetSelectionTimeout, XtAppSetSelectionTimeout – set and obtain selection timeout values Syntax #include <X11/Intrinsic.h> unsigned long XtAppGetSelectionTimeout(XtAppContext app_context); void XtAppSetSelectionTimeout(XtAppContext app_context, unsigned long timeout); Arguments app_context Specifies the application context. timeout Specifies the selection timeout in milliseconds. Description The XtAppGetSelectionTimeout function returns the current selection timeout value, in milliseconds. The selection timeout is the time within which…

XtAppSetExitFlag, XtAppGetExitFlag – thread support functions Syntax #include <X11/Intrinsic.h> void XtAppSetExitFlag(XtAppContext app_context); Boolean XtAppGetExitFlag(XtAppContext app_context); Arguments app_context Specifies the application context. Description To indicate that an application context should exit, use XtAppSetExitFlag. To test the exit status of an application context, use XtAppGetExitFlag. See Also X Toolkit Intrinsics – C Language Interface Xlib – C…

XtAppGetErrorDatabase, XtAppGetErrorDatabaseText – obtain error database Syntax #include <X11/Intrinsic.h> XrmDatabase *XtAppGetErrorDatabase(XtAppContext app_context); void XtAppGetErrorDatabaseText(XtAppContext app_context, const char *name, const char *type, const char *class, const char *defaultMsg, char *buffer_return, int nbytes, XrmDatabase database); Arguments app_context Specifies the application context. buffer_return Specifies the buffer into which the error message is to be returned. class Specifies the…

XtAppGetErrorDatabase, XtAppGetErrorDatabaseText – obtain error database Syntax #include <X11/Intrinsic.h> XrmDatabase *XtAppGetErrorDatabase(XtAppContext app_context); void XtAppGetErrorDatabaseText(XtAppContext app_context, const char *name, const char *type, const char *class, const char *defaultMsg, char *buffer_return, int nbytes, XrmDatabase database); Arguments app_context Specifies the application context. buffer_return Specifies the buffer into which the error message is to be returned. class Specifies the…

XtAppErrorMsg, XtAppSetErrorMsgHandler, XtAppSetWarningMsgHandler, XtAppWarningMsg – high-level error handlers Syntax #include <X11/Intrinsic.h> void XtAppErrorMsg(XtAppContext app_context, const char *name, const char *type, const char *class, const char *defaultMsg, String *params, Cardinal *num_params); XtErrorMsgHandler XtAppSetErrorMsgHandler(XtAppContext app_context, XtErrorMsgHandler msg_handler); XtErrorMsgHandler XtAppSetWarningMsgHandler(XtAppContext app_context, XtErrorMsgHandler msg_handler); void XtAppWarningMsg(XtAppContext app_context, const char *name, const char *type, const char *class, const char *defaultMsg,…

XtAppError, XtAppSetErrorHandler, XtAppSetWarningHandler, XtAppWarning – low-level error handlers Syntax #include <X11/Intrinsic.h> void XtAppError(XtAppContext app_context, const char *message); XtErrorHandler XtAppSetErrorHandler(XtAppContext app_context, XtErrorHandler handler); XtErrorHandler XtAppSetWarningHandler(XtAppContext app_context, XtErrorHandler handler); void XtAppWarning(XtAppContext app_context, const char *message); Arguments app_context Specifies the application context. message Specifies the nonfatal error message that is to be reported. handler Specifies the new fatal…

XtAppCreateShell, XtVaAppCreateShell – create top-level widget instance Syntax #include <X11/Intrinsic.h> Widget XtAppCreateShell(const char *application_name, const char *application_class, WidgetClass widget_class, Display *display, ArgList args, Cardinal num_args); Widget XtVaAppCreateShell(const char * application_name, const char * application_class, WidgetClass widget_class, Display *display, …); Arguments application_name Specifies the name of the application instance. application_class Specifies the class name of this…

XtAppAddWorkProc, XtRemoveWorkProc – Add and remove background processing procedures Syntax #include <X11/Intrinsic.h> XtWorkProcId XtAppAddWorkProc(XtAppContext app_context, XtWorkProc proc, XtPointer client_data); void XtRemoveWorkProc(XtWorkProcId id); Arguments app_context Specifies the application context that identifies the application. client_data Specifies the argument that is to be passed to the specified procedure when it is called. proc Specifies the procedure that is…

XtAppAddTimeOut, XtRemoveTimeOut – register and remove timeouts Syntax #include <X11/Intrinsic.h> XtIntervalId XtAppAddTimeOut(XtAppContext app_context, unsigned long interval, XtTimerCallbackProc proc, XtPointer client_data); void XtRemoveTimeOut(XtIntervalId timer); Arguments app_context Specifies the application context for which the timer is to be set. client_data Specifies the argument that is to be passed to the specified procedure when handling the callback. interval…

XtAppAddSignal, XtRemoveSignal, XtNoticeSignal – register and remove a signal source Syntax #include <X11/Intrinsic.h> XtSignalId XtAppAddSignal(XtAppContext app_context, XtSignalCallbackProc proc, XtPointer client_data); void XtRemoveSignal(XtSignalId id); void XtNoticeSignal(XtSignalId id); Arguments app_context Specifies the application context. client_data Specifies the argument that is to be passed to the specified procedure when a signal has been raised. id Specifies the ID…

XtAppAddInput, XtRemoveInput – register and remove an input source Syntax #include <X11/Intrinsic.h> XtInputId XtAppAddInput(XtAppContext app_context, int source, XtPointer condition, XtInputCallbackProc proc, XtPointer client_data); void XtRemoveInput(XtInputId id); Arguments app_context Specifies the application context that identifies the application. client_data Specifies the argument that is to be passed to the specified procedure when input is available. condition Specifies…

XtAppAddConverter, XtAddConverter – register resource converter Syntax #include <X11/Intrinsic.h> void XtAppAddConverter(XtAppContext app_context, const char *from_type, const char *to_type, XtConverter converter, XtConvertArgList convert_args, Cardinal num_args); void XtAddConverter(const char *from_type, const char *to_type, XtConverter converter, XtConvertArgList convert_args, Cardinal num_args); Arguments app_context Specifies the application context. converter Specifies the type converter procedure. convert_args Specifies how to compute the…

XtAppAddBlockHook, XtRemoveBlockHook – register a block hook procedure Syntax #include <X11/Intrinsic.h> XtBlockHookId XtAppAddBlockHook(XtAppContext app_context, XtBlockHookProc proc, XtPointer client_data); void XtRemoveBlockHook(XtBlockHookId id); Arguments app_context Specifies the application context. proc Specifies the block hook procedure. num_args Specifies the application-specific data to be passed to the block hook. Description XtAppAddBlockHook registers the specified procedure and returns an identifier…

XtAppAddActions – register an action table Syntax #include <X11/Intrinsic.h> void XtAppAddActions(XtAppContext app_context, XtActionList actions, Cardinal num_actions); Arguments app_context Specifies the application context. actions Specifies the action table to register. num_args Specifies the number of entries in this action table. Description The XtAppAddActions function adds the specified action table and registers it with the translation manager….

XtAppAddActionHook, XtRemoveActionHook – register an action hook procedure Syntax #include <X11/Intrinsic.h> XtActionHookId XtAppAddActionHook(XtAppContext app_context, XtActionHookProc proc, XtPointer client_data); void XtRemoveActionHook(XtActionHookId id); Arguments app_context Specifies the application context. proc Specifies the action hook procedure. num_args Specifies the application-specific data to be passed to the action hook. Description XtAppAddActionHook adds the specified procedure to the front of…

XtAllocateGC – obtain a sharable GC with modifiable fields Syntax #include <X11/Intrinsic.h> GC XtAllocateGC(Widget w, Cardinal depth, XtGCMask value_mask, XGCValues *values, XtGCMask dynamic_mask, XtGCMask unused_mask); Arguments values Specifies the actual values for this GC. value_mask Specifies which fields of the values are specified. w Specifies the widget. depth Specifies the depth for which the returned…