Section 3: library functions
XTextWidth, XTextWidth16 – compute text width Syntax int XTextWidth(XFontStruct *font_struct, char *string, int count); int XTextWidth16(XFontStruct *font_struct, XChar2b *string, int count); Arguments count Specifies the character count in the specified string. font_struct Specifies the font used for the width computation. string Specifies the character string. Description The XTextWidth and XTextWidth16 functions return the width of…
XTextWidth, XTextWidth16 – compute text width Syntax int XTextWidth(XFontStruct *font_struct, char *string, int count); int XTextWidth16(XFontStruct *font_struct, XChar2b *string, int count); Arguments count Specifies the character count in the specified string. font_struct Specifies the font used for the width computation. string Specifies the character string. Description The XTextWidth and XTextWidth16 functions return the width of…
XStringListToTextProperty, XTextPropertyToStringList, XFreeStringList, XTextProperty – convert string lists and text property structure Syntax Status XStringListToTextProperty(char **list, int count, XTextProperty *text_prop_return); Status XTextPropertyToStringList(XTextProperty *text_prop, char ***list_return, int *count_return); void XFreeStringList(char **list); Arguments count Specifies the number of strings. count_return Returns the number of strings. list Specifies the list of strings to be freed. list Specifies a…
XStringListToTextProperty, XTextPropertyToStringList, XFreeStringList, XTextProperty – convert string lists and text property structure Syntax Status XStringListToTextProperty(char **list, int count, XTextProperty *text_prop_return); Status XTextPropertyToStringList(XTextProperty *text_prop, char ***list_return, int *count_return); void XFreeStringList(char **list); Arguments count Specifies the number of strings. count_return Returns the number of strings. list Specifies the list of strings to be freed. list Specifies a…
XDrawText, XDrawText16, XTextItem, XTextItem16 – draw polytext text and text drawing structures Syntax int XDrawText(Display *display, Drawable d, GC gc, int x, int y, XTextItem *items, int nitems); int XDrawText16(Display *display, Drawable d, GC gc, int x, int y, XTextItem16 *items, int nitems); Arguments d Specifies the drawable. display Specifies the connection to the X…
XDrawText, XDrawText16, XTextItem, XTextItem16 – draw polytext text and text drawing structures Syntax int XDrawText(Display *display, Drawable d, GC gc, int x, int y, XTextItem *items, int nitems); int XDrawText16(Display *display, Drawable d, GC gc, int x, int y, XTextItem16 *items, int nitems); Arguments d Specifies the drawable. display Specifies the connection to the X…
XTextExtents, XTextExtents16, XQueryTextExtents, XQueryTextExtents16 – compute or query text extents Syntax int XTextExtents(XFontStruct *font_struct, char *string, int nchars, int *direction_return, int *font_ascent_return, int *font_descent_return, XCharStruct *overall_return); int XTextExtents16(XFontStruct *font_struct, XChar2b *string, int nchars, int *direction_return, int *font_ascent_return, int *font_descent_return, XCharStruct *overall_return); int XQueryTextExtents(Display *display, XID font_ID, char *string, int nchars, int *direction_return, int *font_ascent_return, int…
XTextExtents, XTextExtents16, XQueryTextExtents, XQueryTextExtents16 – compute or query text extents Syntax int XTextExtents(XFontStruct *font_struct, char *string, int nchars, int *direction_return, int *font_ascent_return, int *font_descent_return, XCharStruct *overall_return); int XTextExtents16(XFontStruct *font_struct, XChar2b *string, int nchars, int *direction_return, int *font_ascent_return, int *font_descent_return, XCharStruct *overall_return); int XQueryTextExtents(Display *display, XID font_ID, char *string, int nchars, int *direction_return, int *font_ascent_return, int…
XTestQueryExtension, XTestCompareCursorWithWindow, XTestCompareCurrentCursorWithWindow, XTestFakeKeyEvent, XTestFakeButtonEvent, XTestFakeMotionEvent, XTestFakeRelativeMotionEvent, XTestGrabControl, XTestSetGContextOfGC, XTestSetVisualIDOfVisual, XTestDiscard – XTest extension functions Synopsis cc [ flag … ] file … -lXtst [ library … ] #include <X11/extensions/XTest.h> Bool XTestQueryExtension(display, event_base_return, error_base_return, major_version_return, minor_version_return); Display *display; int *event_base_return; int *error_base_return; int *major_version_return; int *minor_version_return; Bool XTestCompareCursorWithWindow(display, window, cursor); Display *display; Window window; Cursor…
XSynchronize, XSetAfterFunction – enable or disable synchronization Syntax int (*XSynchronize(Display *display, Bool onoff))(); int (*XSetAfterFunction(Display *display, int (*procedure)()))(); Arguments display Specifies the connection to the X server. procedure Specifies the procedure to be called. onoff Specifies a Boolean value that indicates whether to enable or disable synchronization. Description The XSynchronize function returns the previous after…
XFlush, XSync, XEventsQueued, XPending – handle output buffer or event queue Syntax int XFlush(Display *display); int XSync(Display *display, Bool discard); int XEventsQueued(Display *display, int mode); int XPending(Display *display); Arguments discard Specifies a Boolean value that indicates whether XSync discards all events on the event queue. display Specifies the connection to the X server. mode Specifies…
XSupportsLocale, XSetLocaleModifiers – determine locale support and configure locale modifiers Syntax Bool XSupportsLocale(void); char *XSetLocaleModifiers(char *modifier_list); Arguments modifier_list Specifies the modifiers. Description The XSupportsLocale function returns True if Xlib functions are capable of operating under the current locale. If it returns False, Xlib locale-dependent functions for which the XLocaleNotSupported return status is defined will return…
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…
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…
XStringToKeysym, XKeysymToString, XKeycodeToKeysym, XKeysymToKeycode, XConvertCase – convert keysyms Syntax KeySym XStringToKeysym(char *string); char *XKeysymToString(KeySym keysym); KeySym XKeycodeToKeysym(Display *display, KeyCode keycode, int index); KeyCode XKeysymToKeycode(Display *display, KeySym keysym); void XConvertCase(KeySym keysym, KeySym *lower_return, KeySym *upper_return); Arguments display Specifies the connection to the X server. index Specifies the element of KeyCode vector. keycode Specifies the KeyCode. keysym…
XStringListToTextProperty, XTextPropertyToStringList, XFreeStringList, XTextProperty – convert string lists and text property structure Syntax Status XStringListToTextProperty(char **list, int count, XTextProperty *text_prop_return); Status XTextPropertyToStringList(XTextProperty *text_prop, char ***list_return, int *count_return); void XFreeStringList(char **list); Arguments count Specifies the number of strings. count_return Returns the number of strings. list Specifies the list of strings to be freed. list Specifies a…
XStoreColors, XStoreColor, XStoreNamedColor – set colors Syntax int XStoreColors(Display *display, Colormap colormap, XColor color[], int ncolors); int XStoreColor(Display *display, Colormap colormap, XColor *color); int XStoreNamedColor(Display *display, Colormap colormap, char *color, unsigned long pixel, int flags); Arguments color Specifies the pixel and RGB values or the color name string (for example, red). color Specifies an array…
XSetWMName, XGetWMName, XStoreName, XFetchName – set or read a window’s WM_NAME property Syntax void XSetWMName(Display *display, Window w, XTextProperty *text_prop); Status XGetWMName(Display *display, Window w, XTextProperty *text_prop_return); int XStoreName(Display *display, Window w, char *window_name); Status XFetchName(Display *display, Window w, char **window_name_return); Arguments display Specifies the connection to the X server. text_prop Specifies the XTextProperty structure…
XStoreColors, XStoreColor, XStoreNamedColor – set colors Syntax int XStoreColors(Display *display, Colormap colormap, XColor color[], int ncolors); int XStoreColor(Display *display, Colormap colormap, XColor *color); int XStoreNamedColor(Display *display, Colormap colormap, char *color, unsigned long pixel, int flags); Arguments color Specifies the pixel and RGB values or the color name string (for example, red). color Specifies an array…
XStoreColors, XStoreColor, XStoreNamedColor – set colors Syntax int XStoreColors(Display *display, Colormap colormap, XColor color[], int ncolors); int XStoreColor(Display *display, Colormap colormap, XColor *color); int XStoreNamedColor(Display *display, Colormap colormap, char *color, unsigned long pixel, int flags); Arguments color Specifies the pixel and RGB values or the color name string (for example, red). color Specifies an array…