SysTutorials Posts

XtGetResourceList, XtGetConstraintResourceList – obtain resource list Syntax #include <X11/Intrinsic.h> void XtGetResourceList(WidgetClass class, XtResourceList *resources_return, Cardinal *num_resources_return); void XtGetConstraintResourceList(WidgetClass class, XtResourceList *resources_return, Cardinal *num_resources_return); Arguments num_resources_return Specifies a pointer to where to store the number of entries in the resource list. resources_return Specifies a pointer to where to store the returned resource list. The caller must…

XtGetClassExtension – locate a class extension record Syntax #include <X11/Intrinsic.h> XtPointer XtGetClassExtension(WidgetClass object_class, Cardinal byte_offset, XrmQuark type, long version, Cardinal record_size); Arguments object_class Specifies the widget class containing the extension list to be searched. byte_offset Specifies the offset in bytes form the base of the widget class of the extension field to be searched. type…

XtGetApplicationResources, XtVaGetApplicationResources – obtain application resources Syntax #include <X11/Intrinsic.h> void XtGetApplicationResources(Widget w, XtPointer base, XtResourceList resources, Cardinal num_resources, ArgList args, Cardinal num_args); void XtVaGetApplicationResources(Widget w, XtPointer base, XtResourceList resources, Cardinal num_resources, …); Arguments args Specifies the argument list to override resources obtained from the resource database. base Specifies the base address of the subpart data…

XtGetApplicationNameAndClass – retrieve application name and class Syntax #include <X11/Intrinsic.h> void XtGetApplicationNameAndClass(Display* display, String* name_return, String* class_return); Arguments display Specifies an open display connection that has been initialized with XtDisplayInitialize. name_return Returns the application name. class_return Returns the application class. Description XtGetApplicationNameAndClass returns the application name and class passed to XtDisplayInitialize for the specified display….

XtGetActionList – obtain class action list Syntax #include <X11/Intrinsic.h> void XtGetActionList(WidgetClass widget_class, XtActionList* actions_return, Cardinal* num_actions_return); Arguments widget_class Specifies the widget class whose actions are to be returned. actions_return Returns the action list. num_actions_return Returns the number of action procedures declared by the class. Description XtGetActionList returns the action table defined by the specified widget…

XtGetActionKeysym – obtain corresponding keysym Syntax #include <X11/Intrinsic.h> KeySym XtGetActionKeysym(XEvent* event, Modifiers* modifiers_return); Arguments event Specifies the event pointer passed to the action procedure by the Intrinsics. modifiers_return Returns the modifiers that caused the match, if non-NULL. Description If XtGetActionKeysym is called after an action procedure has been invoked by the Intrinsics and before that…

XtMalloc, XtCalloc, XtRealloc, XtFree, XtNew, XtNewString – memory management functions Syntax #include <X11/Intrinsic.h> char *XtMalloc(Cardinal size); char *XtCalloc(Cardinal num, Cardinal size); char *XtRealloc(char *ptr, Cardinal num); void XtFree(char *ptr); type *XtNew(type); String XtNewString(String string); Cardinal XtAsprintf(char **new_string, const char *format, …); Arguments num Specifies the number of bytes or array elements. ptr Specifies a pointer…

XtFindFile – search for a file using substitutions in the path list Syntax #include <X11/Intrinsic.h> char * XtFindFile(const char *path, Substitution substitutions, Cardinal num_substitutions, XtFilePredicate predicate); Arguments path Specifies a path of file names, including substitution characters. substitutions Specifies a list of substitutions to make into a path. num_substitutions Specifies the number of substitutions passed…

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…

XtDisplayToApplicationContext – obtain an application context Syntax #include <X11/Intrinsic.h> XtAppContext XtDisplayToApplicationContext(Display* dpy); Arguments dpy Specifies the display that you want the application context for. Description The XtDisplayToApplicationContext function returns the application context for the specified display. See Also X Toolkit Intrinsics – C Language Interface Xlib – C Language X Interface

XtDisplayStringConversionWarning – issue a conversion warning message Syntax #include <X11/Intrinsic.h> void XtDisplayStringConversionWarning(Display* display, const char *from_value, const char *to_type); Arguments display Specifies the display connection with which the conversion is associated. from_value Specifies the string that could not be converted. to_type Specifies the target representation type requested. Description The XtDisplayStringConversionWarning function issues a warning message…

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…

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…

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…

XtOwnSelection, XtOwnSelectionIncremental, XtDisownSelection – set selection owner Syntax #include <X11/Intrinsic.h> Boolean XtOwnSelection(Widget w, Atom selection, Time time, XtConvertSelectionProc convert_proc, XtLoseSelectionProc lose_selection, XtSelectionDoneProc done_proc); Boolean XtOwnSelectionIncremental(Widget w, Atom selection, Time time, XtConvertSelectionIncrProc convert_callback, XtLoseSelectionIncrProc lose_callback, XtSelectionDoneIncrProc done_callback, XtCancelConvertSelectionProc cancel_callback, XtPointer client_data); void XtDisownSelection(Widget w, Atom selection, Time time); Arguments convert_proc Specifies the procedure that is to…

XtConvert, XtDirectConvert – invoke resource converters Syntax #include <X11/Intrinsic.h> void XtConvert(Widget w, const char *from_type, XrmValuePtr from, const char *to_type, XrmValuePtr to_return); void XtDirectConvert(XtConverter converter, XrmValuePtr args, Cardinal num_args, XrmValuePtr from, XrmValuePtr to_return); Arguments args Specifies the argument list that contains the additional arguments needed to perform the conversion (often NULL). converter Specifies the conversion…

XtCreateWidget, XtVaCreateWidget, XtCreateManagedWidget, XtVaCreateManagedWidget, XtDestroyWidget – create and destroy widgets Syntax #include <X11/Intrinsic.h> Widget XtCreateWidget(const char *name, WidgetClass widget_class, Widget parent, ArgList args, Cardinal num_args); Widget XtVaCreateWidget(const char *name, WidgetClass widget_class, Widget parent, …); Widget XtCreateManagedWidget(const char *name, WidgetClass widget_class, Widget parent, ArgList args, Cardinal num_args); Widget XtVaCreateManagedWidget(const char *name, WidgetClass widget_class, Widget parent, …);…