SysTutorials Posts

XtInsertEventTypeHandler, XtRemoveEventTypeHandler, XtRegisterExtensionSelector, XtSetEventDispatcher, XtDispatchEventToWidget – extension event handling Syntax #include <X11/Intrinsic.h> void XtInsertEventTypeHandler(Widget widget, int event_type, XtPointer select_data, XtEventHandler proc, XtPointer client_data, XtListPosition position); void XtRemoveEventTypeHandler(Widget widget, int event_type, XtPointer select_data, XtEventHandler proc, XtPointer client_data); void XtRegisterExtensionSelector(Display* display, int min_event_type, int max_event_type, XtExtensionSelectProc proc, XtPointer client_data); XtEventDispatchProc XtSetEventDispatcher(Display* display, int event_type, XtEventDispatchProc proc); Boolean…

XtErrorMsg, XtSetErrorMsgHandler, XtWarningMsg, XtSetWarningMsgHandler – high-level error handlers Syntax #include <X11/Intrinsic.h> void XtErrorMsg(const char *name, const char *type, const char *class, const char *defaultMsg, String *params, Cardinal *num_params); void XtSetErrorMsgHandler(XtErrorMsgHandler msg_handler); void XtSetWarningMsgHandler(XtErrorMsgHandler msg_handler); void XtWarningMsg(const char *name, const char *type, const char *class, const char *defaultMsg, String *params, Cardinal *num_params); Arguments class Specifies the…

XtError, XtSetErrorHandler, XtSetWarningHandler, XtWarning – low-level error handlers Syntax #include <X11/Intrinsic.h> void XtError(const char *message); void XtSetErrorHandler(XtErrorHandler handler); void XtSetWarningHandler(XtErrorHandler handler); void XtWarning(const char *message); Arguments message Specifies the nonfatal error message that is to be reported. handler Specifies the new fatal error procedure, which should not return, or the nonfatal error procedure, which usually…

XtSetArg, XtMergeArgLists – set and merge ArgLists Syntax #include <X11/Intrinsic.h> int XtSetArg(Arg arg, String name, XtArgVal value); ArgList XtMergeArgLists(ArgList args1, Cardinal num_args1, ArgList args2, Cardinal num_args2); Arguments arg Specifies the name-value pair to set. args1 Specifies the first ArgList. args2 Specifies the second ArgList. num_args1 Specifies the number of arguments in the first argument list….

XtSessionGetToken, XtSessionReturnToken – token management for checkpointing Syntax #include <X11/Intrinsic.h> XtCheckpointToken XtSessionGetToken(Widget w); void XtSessionReturnToken(XtCheckpointToken token); Arguments w Specifies the session widget. token Specifies the token to be returned. Description The XtSessionGetToken function will return NULL if the checkpoint operation instigated by the session manager is not currently under way. To indicate the completion of…

XtSessionGetToken, XtSessionReturnToken – token management for checkpointing Syntax #include <X11/Intrinsic.h> XtCheckpointToken XtSessionGetToken(Widget w); void XtSessionReturnToken(XtCheckpointToken token); Arguments w Specifies the session widget. token Specifies the token to be returned. Description The XtSessionGetToken function will return NULL if the checkpoint operation instigated by the session manager is not currently under way. To indicate the completion of…

XtCreateSelectionRequest, XtSendSelectionRequest, XtCancelSelectionRequest – bundle multiple selection conversion requests into a single request using MULTIPLE target Syntax #include <X11/Intrinsic.h> void XtCreateSelectionRequest(Widget requestor, Atom selection); void XtSendSelectionRequest(Widget requestor, Atom selection, Time time); void XtCancelSelectionRequest(Widget requestor, Atom selection); Arguments requestor Specifies the widget making the request. Must be of class Core or a subclass thereof. selection Specifies…

XtDisplay, XtDisplayOfObject, XtScreen, XtScreenOfObject, XtWindow, XtWindowOfObject – obtain window information about a widget Syntax #include <X11/Intrinsic.h> Display *XtDisplay(Widget w); Display *XtDisplayOfObject(Widget object); Screen *XtScreen(Widget w); Screen *XtScreenOfObject(Widget object); Window XtWindow(Widget w); Window XtWindowOfObject(Widget object); Arguments w Specifies the widget. object Specifies the widget. Description XtDisplay returns the display pointer for the specified widget. XtDisplayOfObject returns…

XtDisplayInitialize, XtOpenDisplay, XtDatabase, XtScreenDatabase, XtCloseDisplay – initialize, open, or close a display Syntax #include <X11/Intrinsic.h> void XtDisplayInitialize(XtAppContext app_context, Display *display, const char *application_name, const char *application_class, XrmOptionDescRec *options, Cardinal num_options, int *argc, char **argv); Display *XtOpenDisplay(XtAppContext app_context, const char *display_string, const char *application_name, const char *application_class, XrmOptionDescRec *options, Cardinal num_options, int *argc, char **argv); void…

XtDisplay, XtDisplayOfObject, XtScreen, XtScreenOfObject, XtWindow, XtWindowOfObject – obtain window information about a widget Syntax #include <X11/Intrinsic.h> Display *XtDisplay(Widget w); Display *XtDisplayOfObject(Widget object); Screen *XtScreen(Widget w); Screen *XtScreenOfObject(Widget object); Window XtWindow(Widget w); Window XtWindowOfObject(Widget object); Arguments w Specifies the widget. object Specifies the widget. Description XtDisplay returns the display pointer for the specified widget. XtDisplayOfObject returns…

XtResolvePathname – search for a file using standard substitution Syntax #include <X11/Intrinsic.h> char * XtResolvePathname(Display *display, const char *type, const char *filename, const char *suffix, const char *path, Substitution substitutions, Cardinal num_substitutions, XtFilePredicate predicate); Arguments display Specifies the display to use to find the language for language substitutions. type filename suffix Specify values to substitute…

XtConfigureWidget, XtMoveWidget, XtResizeWidget – move and resize widgets Syntax #include <X11/Intrinsic.h> void XtConfigureWidget(Widget w, Position x, Position y, Dimension width, Dimension height, Dimension border_width); void XtMoveWidget(Widget w, Position x, Position y); void XtResizeWidget(Widget w, Dimension width, Dimension height, Dimension border_width); void XtResizeWindow(Widget w); Arguments width height border_width Specify the new widget size. w Specifies the…

XtReservePropertyAtom, XtReleasePropertyAtom – maintain a cache of property atoms Syntax #include <X11/Intrinsic.h> Atom XtReservePropertyAtom(Widget w); void XtReleasePropertyAtom(Widget w, Atom atom); Arguments w Specifies the widget used to reserve the atom. atom Specifies the atom whose reservation is to be released. Description XtReservePropertyAtom returns an atom that may be used for properties in conjunction with conversion…

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…

XtAddEventHandler, XtAddRawEventHandler, XtRemoveEventHandler, XtRemoveRawEventHandler, XtInsertEventHandler, XtInsertRawEventHandler – add and remove event handlers Syntax #include <X11/Intrinsic.h> void XtAddEventHandler(Widget w, EventMask event_mask, Boolean nonmaskable, XtEventHandler proc, XtPointer client_data); void XtAddRawEventHandler(Widget w, EventMask event_mask, Boolean nonmaskable, XtEventHandler proc, XtPointer client_data); void XtRemoveEventHandler(Widget w, EventMask event_mask, Boolean nonmaskable, XtEventHandler proc, XtPointer client_data); void XtRemoveRawEventHandler(Widget w, EventMask event_mask, Boolean nonmaskable,…

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…

XtAddGrab, XtRemoveGrab – redirect user input to a modal widget Syntax #include <X11/Intrinsic.h> void XtAddGrab(Widget w, Boolean exclusive, Boolean spring_loaded); void XtRemoveGrab(Widget w); Arguments exclusive Specifies whether user events should be dispatched exclusively to this widget or also to previous widgets in the cascade. spring_loaded Specifies whether this widget was popped up because the user…

XtInsertEventTypeHandler, XtRemoveEventTypeHandler, XtRegisterExtensionSelector, XtSetEventDispatcher, XtDispatchEventToWidget – extension event handling Syntax #include <X11/Intrinsic.h> void XtInsertEventTypeHandler(Widget widget, int event_type, XtPointer select_data, XtEventHandler proc, XtPointer client_data, XtListPosition position); void XtRemoveEventTypeHandler(Widget widget, int event_type, XtPointer select_data, XtEventHandler proc, XtPointer client_data); void XtRegisterExtensionSelector(Display* display, int min_event_type, int max_event_type, XtExtensionSelectProc proc, XtPointer client_data); XtEventDispatchProc XtSetEventDispatcher(Display* display, int event_type, XtEventDispatchProc proc); Boolean…