SysTutorials Posts

XGetVisualInfo, XMatchVisualInfo, XVisualIDFromVisual, XVisualInfo – obtain visual information and visual structure Syntax XVisualInfo *XGetVisualInfo(Display *display, long vinfo_mask, XVisualInfo *vinfo_template, int *nitems_return); Status XMatchVisualInfo(Display *display, int screen, int depth, int class, XVisualInfo *vinfo_return); VisualID XVisualIDFromVisual(Visual *visual); Arguments class Specifies the class of the screen. depth Specifies the depth of the screen. display Specifies the connection to…

XGetVisualInfo, XMatchVisualInfo, XVisualIDFromVisual, XVisualInfo – obtain visual information and visual structure Syntax XVisualInfo *XGetVisualInfo(Display *display, long vinfo_mask, XVisualInfo *vinfo_template, int *nitems_return); Status XMatchVisualInfo(Display *display, int screen, int depth, int class, XVisualInfo *vinfo_return); VisualID XVisualIDFromVisual(Visual *visual); Arguments class Specifies the class of the screen. depth Specifies the depth of the screen. display Specifies the connection to…

XVisibilityEvent – VisibilityNotify event structure Structures The structure for VisibilityNotify events contains: typedef struct {         int type;       /* VisibilityNotify */         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 window;         int state; } XVisibilityEvent; When you receive this event, the structure members are…

XVaCreateNestedList – allocate a nested variable argument list Syntax typedef void * XVaNestedList; XVaNestedList XVaCreateNestedList(int dummy, …); Arguments dummy Specifies an unused argument (required by ANSI C). … Specifies the variable length argument list. Description The XVaCreateNestedList function allocates memory and copies its arguments into a single list pointer, which may be used as a…

XSetICFocus, XUnsetICFocus – set and unset input context focus Syntax void XSetICFocus(XIC ic); void XUnsetICFocus(XIC ic); Arguments ic Specifies the input context. Description The XSetICFocus function allows a client to notify an input method that the focus window attached to the specified input context has received keyboard focus. The input method should take action to…

XOpenIM, XCloseIM, XSetIMValues, XGetIMValues, XDisplayOfIM, XLocaleOfIM, XRegisterIMInstantiateCallback, XUnregisterIMInstantiateCallback – open, close, and obtain input method information Syntax XIM XOpenIM(Display *display, XrmDatabase db, char *res_name, char *res_class); Status XCloseIM(XIM im); char *XSetIMValues(XIM im, …); char *XGetIMValues(XIM im, …); Display *XDisplayOfIM(XIM im); char *XLocaleOfIM(XIM im); Bool XRegisterIMInstantiateCallback(Display *display, XrmDatabase db, char *res_name, char *res_class, XIDProc callback, XPointer…

XUnmapWindow, XUnmapSubwindows – unmap windows Syntax int XUnmapWindow(Display *display, Window w); int XUnmapSubwindows(Display *display, Window w); Arguments display Specifies the connection to the X server. w Specifies the window. Description The XUnmapWindow function unmaps the specified window and causes the X server to generate an UnmapNotify event. If the specified window is already unmapped, XUnmapWindow…

XUnmapWindow, XUnmapSubwindows – unmap windows Syntax int XUnmapWindow(Display *display, Window w); int XUnmapSubwindows(Display *display, Window w); Arguments display Specifies the connection to the X server. w Specifies the window. Description The XUnmapWindow function unmaps the specified window and causes the X server to generate an UnmapNotify event. If the specified window is already unmapped, XUnmapWindow…

XUnmapEvent – UnmapNotify event structure Structures The structure for UnmapNotify events contains: typedef struct {         int type;       /* UnmapNotify */         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;         Bool from_configure; } XUnmapEvent; When you receive this event, the structure…

XInitThreads, XLockDisplay, XUnlockDisplay – multi-threading support Syntax Status XInitThreads(void); void XLockDisplay(Display *display); void XUnlockDisplay(Display *display); Arguments display Specifies the connection to the X server. Description The XInitThreads function initializes Xlib support for concurrent threads. This function must be the first Xlib function a multi-threaded program calls, and it must complete before any other Xlib call…

XLoadFont, XQueryFont, XLoadQueryFont, XFreeFont, XGetFontProperty, XUnloadFont, XCharStruct, XFontProp, XChar2b, XFontStruct – load or unload fonts and font metric structures Syntax Font XLoadFont(Display *display, char *name); XFontStruct *XQueryFont(Display *display, XID font_ID); XFontStruct *XLoadQueryFont(Display *display, char *name); int XFreeFont(Display *display, XFontStruct *font_struct); Bool XGetFontProperty(XFontStruct *font_struct, Atom atom, unsigned long *value_return); int XUnloadFont(Display *display, Font font); Arguments atom…

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…

XIntersectRegion, XUnionRegion, XUnionRectWithRegion, XSubtractRegion, XXorRegion, XOffsetRegion, XShrinkRegion – region arithmetic Syntax int XIntersectRegion(Region sra, Region srb, Region dr_return); int XUnionRegion(Region sra, Region srb, Region dr_return); int XUnionRectWithRegion(XRectangle *rectangle, Region src_region, Region dest_region_return); int XSubtractRegion(Region sra, Region srb, Region dr_return); int XXorRegion(Region sra, Region srb, Region dr_return); int XOffsetRegion(Region r, int dx, int dy); int XShrinkRegion(Region…

XIntersectRegion, XUnionRegion, XUnionRectWithRegion, XSubtractRegion, XXorRegion, XOffsetRegion, XShrinkRegion – region arithmetic Syntax int XIntersectRegion(Region sra, Region srb, Region dr_return); int XUnionRegion(Region sra, Region srb, Region dr_return); int XUnionRectWithRegion(XRectangle *rectangle, Region src_region, Region dest_region_return); int XSubtractRegion(Region sra, Region srb, Region dr_return); int XXorRegion(Region sra, Region srb, Region dr_return); int XOffsetRegion(Region r, int dx, int dy); int XShrinkRegion(Region…

XInstallColormap, XUninstallColormap, XListInstalledColormaps – control colormaps Syntax int XInstallColormap(Display *display, Colormap colormap); int XUninstallColormap(Display *display, Colormap colormap); Colormap *XListInstalledColormaps(Display *display, Window w, int *num_return); Arguments colormap Specifies the colormap. display Specifies the connection to the X server. num_return Returns the number of currently installed colormaps. w Specifies the window that determines the screen. Description The…

XGrabServer, XUngrabServer – grab the server Syntax int XGrabServer(Display *display); int XUngrabServer(Display *display); Arguments display Specifies the connection to the X server. Description The XGrabServer function disables processing of requests and close downs on all other connections than the one this request arrived on. You should not grab the X server any more than is…

XGrabPointer, XUngrabPointer, XChangeActivePointerGrab – grab the pointer Syntax int XGrabPointer(Display *display, Window grab_window, Bool owner_events, unsigned int event_mask, int pointer_mode, int keyboard_mode, Window confine_to, Cursor cursor, Time time); int XUngrabPointer(Display *display, Time time); int XChangeActivePointerGrab(Display *display, unsigned int event_mask, Cursor cursor, Time time); Arguments confine_to Specifies the window to confine the pointer in or None….

XGrabKeyboard, XUngrabKeyboard – grab the keyboard Syntax int XGrabKeyboard(Display *display, Window grab_window, Bool owner_events, int pointer_mode, int keyboard_mode, Time time); int XUngrabKeyboard(Display *display, Time time); Arguments display Specifies the connection to the X server. grab_window Specifies the grab window. keyboard_mode Specifies further processing of keyboard events. You can pass GrabModeSync or GrabModeAsync. owner_events Specifies a…

XGrabKey, XUngrabKey – grab keyboard keys Syntax int XGrabKey(Display *display, int keycode, unsigned int modifiers, Window grab_window, Bool owner_events, int pointer_mode, int keyboard_mode); int XUngrabKey(Display *display, int keycode, unsigned int modifiers, Window grab_window); Arguments display Specifies the connection to the X server. grab_window Specifies the grab window. keyboard_mode Specifies further processing of keyboard events. You…

XGrabDeviceKey, XUngrabDeviceKey – grab/ungrab extension input device Keys Synopsis #include <X11/extensions/XInput.h> int XGrabDeviceKey( Display *display, XDevice *device, unsigned int key, unsigned int modifiers, XDevice *modifier_device, Window grab_window, Bool owner_events, unsigned int event_count, XEventClass *event_list, int this_device_mode, int other_devices_mode); int XUngrabDeviceKey( Display *display, XDevice *device, unsigned int key, unsigned int modifiers, XDevice *modifier_device, Window grab_window); display…