Golang XUtil.RootWin方法代碼示例

// _NET_DESKTOP_LAYOUT set
func DesktopLayoutSet(xu *xgbutil.XUtil, orientation, columns, rows,
	startingCorner uint) error {

	return xprop.ChangeProp32(xu, xu.RootWin(), "_NET_DESKTOP_LAYOUT",
		"CARDINAL", orientation, columns, rows,
		startingCorner)
}

// sendClientMessages is a goroutine that sends client messages to the root
// window. We then listen to them later as a demonstration of responding to
// X events. (They are sent with SubstructureNotify and SubstructureRedirect
// masks set. So in order to receive them, we'll have to explicitly listen
// to events of that type on the root window.)
func xSource(X *xgbutil.XUtil) {
	i := 1
	for {
		ewmh.ClientEvent(X, X.RootWin(), "NOOP", i)
		i++
		time.Sleep(200 * time.Millisecond)
	}
}

// _NET_SUPPORTED set
// This will create any atoms in the argument if they don't already exist.
func SupportedSet(xu *xgbutil.XUtil, atomNames []string) error {
	atoms, err := xprop.StrToAtoms(xu, atomNames)
	if err != nil {
		return err
	}

	return xprop.ChangeProp32(xu, xu.RootWin(), "_NET_SUPPORTED", "ATOM",
		atoms...)
}

// _NET_SHOWING_DESKTOP req
func ShowingDesktopReq(xu *xgbutil.XUtil, show bool) error {
	var showInt uint
	if show {
		showInt = 1
	} else {
		showInt = 0
	}
	return ClientEvent(xu, xu.RootWin(), "_NET_SHOWING_DESKTOP", showInt)
}

// _NET_DESKTOP_GEOMETRY get
func DesktopGeometryGet(xu *xgbutil.XUtil) (*DesktopGeometry, error) {
	geom, err := xprop.PropValNums(xprop.GetProperty(xu, xu.RootWin(),
		"_NET_DESKTOP_GEOMETRY"))
	if err != nil {
		return nil, err
	}

	return &DesktopGeometry{Width: int(geom[0]), Height: int(geom[1])}, nil
}

// _NET_DESKTOP_NAMES set
func DesktopNamesSet(xu *xgbutil.XUtil, names []string) error {
	nullterm := make([]byte, 0)
	for _, name := range names {
		nullterm = append(nullterm, name...)
		nullterm = append(nullterm, 0)
	}
	return xprop.ChangeProp(xu, xu.RootWin(), 8, "_NET_DESKTOP_NAMES",
		"UTF8_STRING", nullterm)
}

// _NET_SHOWING_DESKTOP set
func ShowingDesktopSet(xu *xgbutil.XUtil, show bool) error {
	var showInt uint
	if show {
		showInt = 1
	} else {
		showInt = 0
	}
	return xprop.ChangeProp32(xu, xu.RootWin(), "_NET_SHOWING_DESKTOP",
		"CARDINAL", showInt)
}

// _NET_WM_HANDLED_ICONS set
func WmHandledIconsSet(xu *xgbutil.XUtil, handle bool) error {
	var handled uint
	if handle {
		handled = 1
	} else {
		handled = 0
	}
	return xprop.ChangeProp32(xu, xu.RootWin(), "_NET_WM_HANDLED_ICONS",
		"CARDINAL", handled)
}

// _NET_DESKTOP_VIEWPORT set
func DesktopViewportSet(xu *xgbutil.XUtil, viewports []DesktopViewport) error {
	coords := make([]uint, len(viewports)*2)
	for i, viewport := range viewports {
		coords[i*2] = uint(viewport.X)
		coords[i*2+1] = uint(viewport.Y)
	}

	return xprop.ChangeProp32(xu, xu.RootWin(), "_NET_DESKTOP_VIEWPORT",
		"CARDINAL", coords...)
}

// newWindow creates a new window with a random background color. It sets the
// WM_PROTOCOLS property to contain the WM_DELETE_WINDOW atom. It also sets
// up a ClientMessage event handler so that we know when to destroy the window.
// We also set up a mouse binding so that clicking inside a window will
// create another one.
func newWindow(X *xgbutil.XUtil) {
	counter++
	win, err := xwindow.Generate(X)
	if err != nil {
		log.Fatal(err)
	}

	// Get a random background color, create the window (ask to receive button
	// release events while we're at it) and map the window.
	bgColor := rand.Intn(0xffffff + 1)
	win.Create(X.RootWin(), 0, 0, 200, 200,
		xproto.CwBackPixel|xproto.CwEventMask,
		uint32(bgColor), xproto.EventMaskButtonRelease)

	// WMGracefulClose does all of the work for us. It sets the appropriate
	// values for WM_PROTOCOLS, and listens for ClientMessages that implement
	// the WM_DELETE_WINDOW protocol. When one is found, the provided callback
	// is executed.
	win.WMGracefulClose(
		func(w *xwindow.Window) {
			// Detach all event handlers.
			// This should always be done when a window can no longer
			// receive events.
			xevent.Detach(w.X, w.Id)
			mousebind.Detach(w.X, w.Id)
			w.Destroy()

			// Exit if there are no more windows left.
			counter--
			if counter == 0 {
				os.Exit(0)
			}
		})

	// It's important that the map comes after setting WMGracefulClose, since
	// the WM isn't obliged to watch updates to the WM_PROTOCOLS property.
	win.Map()

	// A mouse binding so that a left click will spawn a new window.
	// Note that we don't issue a grab here. Typically, window managers will
	// grab a button press on the client window (which usually activates the
	// window), so that we'd end up competing with the window manager if we
	// tried to grab it.
	// Instead, we set a ButtonRelease mask when creating the window and attach
	// a mouse binding *without* a grab.
	err = mousebind.ButtonReleaseFun(
		func(X *xgbutil.XUtil, ev xevent.ButtonReleaseEvent) {
			newWindow(X)
		}).Connect(X, win.Id, "1", false, false)
	if err != nil {
		log.Fatal(err)
	}
}

// _NET_WORKAREA set
func WorkareaSet(xu *xgbutil.XUtil, workareas []Workarea) error {
	rects := make([]uint, len(workareas)*4)
	for i, workarea := range workareas {
		rects[i*4+0] = uint(workarea.X)
		rects[i*4+1] = uint(workarea.Y)
		rects[i*4+2] = workarea.Width
		rects[i*4+3] = workarea.Height
	}

	return xprop.ChangeProp32(xu, xu.RootWin(), "_NET_WORKAREA", "CARDINAL",
		rects...)
}

// _NET_SHOWING_DESKTOP get
func ShowingDesktopGet(xu *xgbutil.XUtil) (bool, error) {
	reply, err := xprop.GetProperty(xu, xu.RootWin(), "_NET_SHOWING_DESKTOP")
	if err != nil {
		return false, err
	}

	val, err := xprop.PropValNum(reply, nil)
	if err != nil {
		return false, err
	}

	return val == 1, nil
}

// _NET_DESKTOP_VIEWPORT get
func DesktopViewportGet(xu *xgbutil.XUtil) ([]DesktopViewport, error) {
	coords, err := xprop.PropValNums(xprop.GetProperty(xu, xu.RootWin(),
		"_NET_DESKTOP_VIEWPORT"))
	if err != nil {
		return nil, err
	}

	viewports := make([]DesktopViewport, len(coords)/2)
	for i, _ := range viewports {
		viewports[i] = DesktopViewport{
			X: int(coords[i*2]),
			Y: int(coords[i*2+1]),
		}
	}
	return viewports, nil
}

// dragGrab is a shortcut for grabbing the pointer for a drag.
func dragGrab(xu *xgbutil.XUtil, grabwin xproto.Window, win xproto.Window,
	cursor xproto.Cursor) bool {

	status, err := GrabPointer(xu, grabwin, xu.RootWin(), cursor)
	if err != nil {
		xgbutil.Logger.Printf("Mouse dragging was unsuccessful because: %v",
			err)
		return false
	}
	if !status {
		xgbutil.Logger.Println("Mouse dragging was unsuccessful because " +
			"we could not establish a pointer grab.")
		return false
	}

	mouseDragSet(xu, true)
	return true
}

// _NET_WM_PING req extra
func WmPingExtra(xu *xgbutil.XUtil, win xproto.Window, response bool,
	time xproto.Timestamp) error {

	pingAtom, err := xprop.Atm(xu, "_NET_WM_PING")
	if err != nil {
		return err
	}

	var evWindow xproto.Window
	if response {
		evWindow = xu.RootWin()
	} else {
		evWindow = win
	}

	return ClientEvent(xu, evWindow, "WM_PROTOCOLS", int(pingAtom), int(time),
		int(win))
}