Xlib â C Language X Interface

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<strong>Xlib</strong> − C LibraryX11, Release 6.7 DRAFT−−−Ifwindow Bisnot a root window, itgenerates a FocusIn event on each windowfrom window B’s root down to but not including window B,with the detail memberof each XFocusInEvent structure set to NotifyNonlinearVirtual.Itgenerates a FocusIn event on window B,with the detail member of each XFocusInEventstructure set to NotifyNonlinear.Ifwindow Pisaninferior of window B,itgenerates a FocusIn event on each windowbelow window Bdown toand including window P,with the detail member ofeach XFocusInEvent structure set to NotifyPointer.• When the focus moves from window Ato PointerRoot (events sent to the window underthe pointer) or None (discard), and the pointer is in window P,the X server does the following:−−−−−Ifwindow Pisaninferior of window A,itgenerates a FocusOut event on each windowfrom window Puptobut not including window A,with the detail member ofeach XFocusOutEvent structure set to NotifyPointer.Itgenerates a FocusOut event on window A,with the detail member of the XFocusOutEventstructure set to NotifyNonlinear.Ifwindow Aisnot a root window, itgenerates a FocusOut event on each windowabove window Auptoand including its root, with the detail member of each XFocusOutEventstructure set to NotifyNonlinearVirtual.Itgenerates a FocusIn event on the root window ofall screens, with the detail memberof each XFocusInEvent structure set to NotifyPointerRoot (or NotifyDetail-None).Ifthe new focus is PointerRoot, itgenerates a FocusIn event on each window fromwindow P’s root down to and including window P,with the detail member of eachXFocusInEvent structure set to NotifyPointer.• When the focus moves from PointerRoot (events sent to the window under the pointer) orNone to window A,and the pointer is in window P,the X server does the following:−−−−−Ifthe old focus is PointerRoot, itgenerates a FocusOut event on each windowfrom window Puptoand including window P’s root, with the detail member of eachXFocusOutEvent structure set to NotifyPointer.Itgenerates a FocusOut event on all root windows, with the detail member of eachXFocusOutEvent structure set to NotifyPointerRoot (or NotifyDetailNone).Ifwindow Aisnot a root window, itgenerates a FocusIn event on each windowfrom window A’s root down to but not including window A,with the detail memberof each XFocusInEvent structure set to NotifyNonlinearVirtual.Itgenerates a FocusIn event on window A,with the detail member of the XFocusInEventstructure set to NotifyNonlinear.Ifwindow Pisaninferior of window A,itgenerates a FocusIn event on each windowbelow window Adown toand including window P,with the detail member ofeach XFocusInEvent structure set to NotifyPointer.• When the focus moves from PointerRoot (events sent to the window under the pointer) toNone (or vice versa), and the pointer is in window P,the X server does the following:−Ifthe old focus is PointerRoot, itgenerates a FocusOut event on each windowfrom window Puptoand including window P’s root, with the detail member of eachXFocusOutEvent structure set to NotifyPointer.213
<strong>Xlib</strong> − C LibraryX11, Release 6.7 DRAFT−−−Itgenerates a FocusOut event on all root windows, with the detail member of eachXFocusOutEvent structure set to either NotifyPointerRoot or NotifyDetailNone.Itgenerates a FocusIn event on all root windows, with the detail member of eachXFocusInEvent structure set to NotifyDetailNone or NotifyPointerRoot.Ifthe new focus is PointerRoot, itgenerates a FocusIn event on each window fromwindow P’s root down to and including window P,with the detail member of eachXFocusInEvent structure set to NotifyPointer.10.7.2. Focus Events Generated by GrabsFocus events in which the keyboard grab activates are identified by XFocusInEvent or XFocusOutEventstructures whose mode member is set to NotifyGrab. Focus events in which thekeyboard grab deactivates are identified by XFocusInEvent or XFocusOutEvent structureswhose mode member is set to NotifyUngrab (see XGrabKeyboard).• When a keyboard grab activates before generating any actual KeyPress event that activatesthe grab, G is the grab_window, and F is the current focus, the X server does the following:−Itgenerates FocusIn and FocusOut events, with the mode members of the XFocusInEventand XFocusOutEvent structures set to NotifyGrab. These events aregenerated as if the focus were to change from F to G.• When a keyboard grab deactivates after generating any actual KeyRelease event that deactivatesthe grab, G is the grab_window, and F is the current focus, the X server does the following:−Itgenerates FocusIn and FocusOut events, with the mode members of the XFocusInEventand XFocusOutEvent structures set to NotifyUngrab. These eventsare generated as if the focus were to change from G to F.10.8. Key Map State Notification EventsThe X server can report KeymapNotify events to clients that want information about changes intheir keyboard state.To receive KeymapNotify events, set the KeymapStateMask bit in the event-mask attribute ofthe window. The X server generates this event immediately after every EnterNotify andFocusIn event.The structure for this event type contains:/* generated on EnterWindow and FocusIn when KeymapState selected */typedef struct {int type; /* KeymapNotify */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;char key_vector[32];}XKeymapEvent;The window member is not used but is present to aid some toolkits. The key_vector member isset to the bit vector of the keyboard. Each bit set to 1 indicates that the corresponding key is currentlypressed. The vector is represented as 32 bytes. Byte N (from 0) contains the bits for keys214
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AcknowledgmentsThe design and imple
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Release 6Stephen Gildea (X Consorti
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Xlib − C LibraryX11, Release 6.7
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4.2. Translating Screen Coordinates
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10.7. Input Focus Events . . . . .
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13.5.6.1. Input Style . . . . . . .
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Xlib â C Language X Interface