func main() {
// Connect to the X server using the DISPLAY environment variable.
X, err := xgbutil.NewConn()
if err != nil {
log.Fatal(err)
}
// Get a list of all client ids.
clientids, err := ewmh.ClientListGet(X)
if err != nil {
log.Fatal(err)
}
// Iterate through each client, find its name and find its size.
for _, clientid := range clientids {
name, err := ewmh.WmNameGet(X, clientid)
// If there was a problem getting _NET_WM_NAME or if its empty,
// try the old-school version.
if err != nil || len(name) == 0 {
name, err = icccm.WmNameGet(X, clientid)
// If we still can't find anything, give up.
if err != nil || len(name) == 0 {
name = "N/A"
}
}
// Now find the geometry, including decorations, of the client window.
// Note that DecorGeometry actually traverses the window tree by
// issuing QueryTree requests until a top-level window (i.e., its
// parent is the root window) is found. The geometry of *that* window
// is then returned.
dgeom, err := xwindow.New(X, clientid).DecorGeometry()
if err != nil {
log.Printf("Could not get geometry for %s (0x%X) because: %s",
name, clientid, err)
continue
}
fmt.Printf("%s (0x%x)\n", name, clientid)
fmt.Printf("\tGeometry: %s\n", dgeom)
}
}
func main() {
X, err := xgbutil.NewConn()
if err != nil {
log.Fatal(err)
}
// Start generating other source events.
otherChan := otherSource()
// Start generating X events (by sending client messages to root window).
go xSource(X)
// Listen to those X events.
xwindow.New(X, X.RootWin()).Listen(xproto.EventMaskSubstructureNotify)
// Respond to those X events.
xevent.ClientMessageFun(
func(X *xgbutil.XUtil, ev xevent.ClientMessageEvent) {
atmName, err := xprop.AtomName(X, ev.Type)
if err != nil {
log.Fatal(err)
}
fmt.Printf("ClientMessage: %d. %s\n", ev.Data.Data32[0], atmName)
}).Connect(X, X.RootWin())
// Instead of using the usual xevent.Main, we use xevent.MainPing.
// It runs the main event loop inside a goroutine and returns ping
// channels, which are sent benign values right before an event is
// dequeued and right after that event has finished running all callbacks
// associated with it, respectively.
pingBefore, pingAfter, pingQuit := xevent.MainPing(X)
for {
select {
case <-pingBefore:
// Wait for the event to finish processing.
<-pingAfter
case otherVal := <-otherChan:
fmt.Printf("Processing other event: %d\n", otherVal)
case <-pingQuit:
fmt.Printf("xevent loop has quit")
return
}
}
}
func main() {
// Connect to the X server using the DISPLAY environment variable.
X, err := xgbutil.NewConn()
if err != nil {
log.Fatal(err)
}
// Wrap the root window in a nice Window type.
root := xwindow.New(X, X.RootWin())
// Get the geometry of the root window.
rgeom, err := root.Geometry()
if err != nil {
log.Fatal(err)
}
// Get the rectangles for each of the active physical heads.
// These are returned sorted in order from left to right and then top
// to bottom.
// But first check if Xinerama is enabled. If not, use root geometry.
var heads xinerama.Heads
if X.ExtInitialized("XINERAMA") {
heads, err = xinerama.PhysicalHeads(X)
if err != nil {
log.Fatal(err)
}
} else {
heads = xinerama.Heads{rgeom}
}
// Fetch the list of top-level client window ids currently managed
// by the running window manager.
clients, err := ewmh.ClientListGet(X)
if err != nil {
log.Fatal(err)
}
// Output the head geometry before modifying them.
fmt.Println("Workarea for each head:")
for i, head := range heads {
fmt.Printf("\tHead #%d: %s\n", i+1, head)
}
// For each client, check to see if it has struts, and if so, apply
// them to our list of head rectangles.
for _, clientid := range clients {
strut, err := ewmh.WmStrutPartialGet(X, clientid)
if err != nil { // no struts for this client
continue
}
// Apply the struts to our heads.
// This modifies 'heads' in place.
xrect.ApplyStrut(heads, uint(rgeom.Width()), uint(rgeom.Height()),
strut.Left, strut.Right, strut.Top, strut.Bottom,
strut.LeftStartY, strut.LeftEndY,
strut.RightStartY, strut.RightEndY,
strut.TopStartX, strut.TopEndX,
strut.BottomStartX, strut.BottomEndX)
}
// Now output the head geometry again after modification.
fmt.Println("Workarea for each head after applying struts:")
for i, head := range heads {
fmt.Printf("\tHead #%d: %s\n", i+1, head)
}
}