SysTutorials Posts

XSetErrorHandler, XGetErrorText, XDisplayName, XSetIOErrorHandler, XGetErrorDatabaseText – default error handlers Syntax int (*XSetErrorHandler(int (*handler)(Display *, XErrorEvent *)))(); int XGetErrorText(Display *display, int code, char *buffer_return, int length); char *XDisplayName(char *string); int (*XSetIOErrorHandler(int (*handler)(Display *)))(); int XGetErrorDatabaseText(Display *display, char *name, char *message, char *default_string, char *buffer_return, int length); Arguments buffer_return Returns the error description. code Specifies the error…

XSendEvent, XDisplayMotionBufferSize, XGetMotionEvents, XTimeCoord – send events and pointer motion history structure Syntax Status XSendEvent(Display *display, Window w, Bool propagate, long event_mask, XEvent *event_send); unsigned long XDisplayMotionBufferSize(Display *display); XTimeCoord *XGetMotionEvents(Display *display, Window w, Time start, Time stop, int *nevents_return); Arguments display Specifies the connection to the X server. event_mask Specifies the event mask. event_send Specifies…

XChangeKeyboardMapping, XGetKeyboardMapping, XDisplayKeycodes, XSetModifierMapping, XGetModifierMapping, XNewModifiermap, XInsertModifiermapEntry, XDeleteModifiermapEntry, XFreeModifiermap, XModifierKeymap – manipulate keyboard encoding and keyboard encoding structure Syntax int XChangeKeyboardMapping(Display *display, int first_keycode, int keysyms_per_keycode, KeySym *keysyms, int num_codes); KeySym *XGetKeyboardMapping(Display *display, KeyCode first_keycode, int keycode_count, int *keysyms_per_keycode_return); int XDisplayKeycodes(Display *display, int *min_keycodes_return, int *max_keycodes_return); int XSetModifierMapping(Display *display, XModifierKeymap *modmap); XModifierKeymap *XGetModifierMapping(Display *display); XModifierKeymap…

XAddHost, XAddHosts, XListHosts, XRemoveHost, XRemoveHosts, XSetAccessControl, XEnableAccessControl, XDisableAccessControl, XHostAddress, XServerInterpretedAddress – control host access and host control structure Syntax int XAddHost(Display *display, XHostAddress *host); int XAddHosts(Display *display, XHostAddress *hosts, int num_hosts); XHostAddress *XListHosts(Display *display, int *nhosts_return, Bool state_return); int XRemoveHost(Display *display, XHostAddress *host); int XRemoveHosts(Display *display, XHostAddress *hosts, int num_hosts); int XSetAccessControl(Display *display, int mode);…

XFontsOfFontSet, XBaseFontNameListOfFontSet, XLocaleOfFontSet, XContextDependentDrawing, XContextualDrawing, XDirectionalDependentDrawing – obtain fontset information Syntax int XFontsOfFontSet(XFontSet font_set, XFontStruct ***font_struct_list_return, char ***font_name_list_return); char *XBaseFontNameListOfFontSet(XFontSet font_set); char *XLocaleOfFontSet(XFontSet font_set); Bool XContextDependentDrawing(XFontSet font_set); Bool XContextualDrawing(XFontSet font_set); Bool XDirectionalDependentDrawing(XFontSet font_set); Arguments font_set Specifies the font set. font_name_list_return Returns the list of font names. font_struct_list_return Returns the list of font structs. Description The…

XGetDeviceMotionEvents, XDeviceTimeCoord – get device motion history Synopsis #include <X11/extensions/XInput.h> XDeviceTimeCoord *XGetDeviceMotionEvents( Display *display, XDevice *device, Time start, Time stop, int *nevents_return, int *mode_return, int *axis_count_return); display Specifies the connection to the X server. device Specifies the device whose motion history is to be queried. start, stop Specify the time interval in which the events…

XDeviceBell – ring a bell on a device supported through the input extension Synopsis #include <X11/extensions/XInput.h> Status XDeviceBell( Display *display, XDevice *device, XID feedbackclass, XID feedbackid, int percent); display Specifies the connection to the X server. device Specifies the device with which the bell is associated. feedbackclass Specifies the class of the feedback with which…

XDestroyWindowEvent – DestroyNotify event structure Structures The structure for DestroyNotify events contains: typedef struct {         int type;       /* DestroyNotify */         unsigned long serial;   /* # of last request processed by server */         Bool send_event;        /* true if this came from a SendEvent request */         Display *display;       /* Display the event was read from */         Window event;         Window window; } XDestroyWindowEvent; When you receive this event, the structure members are…

XDestroyWindow, XDestroySubwindows – destroy windows Syntax int XDestroyWindow(Display *display, Window w); int XDestroySubwindows(Display *display, Window w); Arguments display Specifies the connection to the X server. w Specifies the window. Description The XDestroyWindow function destroys the specified window as well as all of its subwindows and causes the X server to generate a DestroyNotify event for…

XDestroyWindow, XDestroySubwindows – destroy windows Syntax int XDestroyWindow(Display *display, Window w); int XDestroySubwindows(Display *display, Window w); Arguments display Specifies the connection to the X server. w Specifies the window. Description The XDestroyWindow function destroys the specified window as well as all of its subwindows and causes the X server to generate a DestroyNotify event for…

XCreateRegion, XSetRegion, XDestroyRegion – create or destroy regions Syntax Region XCreateRegion(void); int XSetRegion(Display *display, GC gc, Region r); int XDestroyRegion(Region r); Arguments display Specifies the connection to the X server. gc Specifies the GC. r Specifies the region. Description The XCreateRegion function creates a new empty region. The XSetRegion function sets the clip-mask in the…

XCreateOC, XDestroyOC, XSetOCValues, XGetOCValues, XOMOfOC – create output contexts Syntax XOC XCreateOC(XOM om); void XDestroyOC(XOC oc); char * XSetOCValues(XOC oc, …); char * XGetOCValues(XOC oc, …); XOM XOMOfOC(XOC oc); Arguments oc Specifies the output context. om Specifies the output method. … Specifies the variable length argument list to set or get XOC values. Description The…

XInitImage, XCreateImage, XGetPixel, XPutPixel, XSubImage, XAddPixel, XDestroyImage – image utilities Syntax Status XInitImage(XImage *image); XImage *XCreateImage(Display *display, Visual *visual, unsigned int depth, int format, int offset, char *data, unsigned int width, unsigned int height, int bitmap_pad, int bytes_per_line); unsigned long XGetPixel(XImage *ximage, int x, int y); int XPutPixel(XImage *ximage, int x, int y, unsigned long…

XCreateIC, XDestroyIC, XIMOfIC – create, destroy, and obtain the input method of an input context Syntax XIC XCreateIC(XIM im, …); void XDestroyIC(XIC ic); XIM XIMOfIC(XIC ic); Arguments ic Specifies the input context. im Specifies the input method. … Specifies the variable length argument list to set XIC values. Description The XCreateIC function creates a context…

XGetWindowProperty, XListProperties, XChangeProperty, XRotateWindowProperties, XDeleteProperty – obtain and change window properties Syntax int XGetWindowProperty(Display *display, Window w, Atom property, long long_offset, long long_length, Bool delete, Atom req_type, Atom *actual_type_return, int *actual_format_return, unsigned long *nitems_return, unsigned long *bytes_after_return, unsigned char **prop_return); Atom *XListProperties(Display *display, Window w, int *num_prop_return); int XChangeProperty(Display *display, Window w, Atom property, Atom…

XChangeKeyboardMapping, XGetKeyboardMapping, XDisplayKeycodes, XSetModifierMapping, XGetModifierMapping, XNewModifiermap, XInsertModifiermapEntry, XDeleteModifiermapEntry, XFreeModifiermap, XModifierKeymap – manipulate keyboard encoding and keyboard encoding structure Syntax int XChangeKeyboardMapping(Display *display, int first_keycode, int keysyms_per_keycode, KeySym *keysyms, int num_codes); KeySym *XGetKeyboardMapping(Display *display, KeyCode first_keycode, int keycode_count, int *keysyms_per_keycode_return); int XDisplayKeycodes(Display *display, int *min_keycodes_return, int *max_keycodes_return); int XSetModifierMapping(Display *display, XModifierKeymap *modmap); XModifierKeymap *XGetModifierMapping(Display *display); XModifierKeymap…

XGetDeviceProperty, XChangeDeviceProperty, XDeleteDeviceProperty – Get, change or delete a device’s property. Synopsis #include <X11/extensions/XInput.h> int XGetDeviceProperty( Display *display, XDevice *device, Atom property, long offset, long length, Bool delete, Atom req_type, Atom *actual_type_return, int *actual_format_return, unsigned long *nitems_return, unsigned long *bytes_after_return, unsigned char **prop_return) void XChangeDeviceProperty( Display *display, XDevice *device, Atom property, Atom type, int format,…

XSaveContext, XFindContext, XDeleteContext, XUniqueContext – associative look-up routines Syntax int XSaveContext(Display *display, XID rid, XContext context, XPointer data); int XFindContext(Display *display, XID rid, XContext context, XPointer *data_return); int XDeleteContext(Display *display, XID rid, XContext context); XContext XUniqueContext(void); Arguments context Specifies the context type to which the data belongs. data Specifies the data to be associated with…

XDefineCursor, XUndefineCursor – define cursors Syntax int XDefineCursor(Display *display, Window w, Cursor cursor); int XUndefineCursor(Display *display, Window w); Arguments cursor Specifies the cursor that is to be displayed or None. display Specifies the connection to the X server. w Specifies the window. Description If a cursor is set, it will be used when the pointer…

XmbTextListToTextProperty, XwcTextListToTextProperty, Xutf8TextListToTextProperty, XmbTextPropertyToTextList, XwcTextPropertyToTextList, Xutf8TextPropertyToTextList, XwcFreeStringList, XDefaultString – convert text lists and text property structures Syntax int XmbTextListToTextProperty(Display *display, char **list, int count, XICCEncodingStyle style, XTextProperty *text_prop_return); int XwcTextListToTextProperty(Display *display, wchar_t **list, int count, XICCEncodingStyle style, XTextProperty *text_prop_return); int Xutf8TextListToTextProperty(Display *display, char **list, int count, XICCEncodingStyle style, XTextProperty *text_prop_return); int XmbTextPropertyToTextList(Display *display, XTextProperty *text_prop,…