// WMGracefulClose will do all the necessary setup to implement the
// WM_DELETE_WINDOW protocol. This will prevent well-behaving window managers
// from killing your client whenever one of your windows is closed. (Killing
// a client is bad because it will destroy your X connection and any other
// clients you have open.)
// You must provide a callback function that is called when the window manager
// asks you to close your window. (You may provide some means of confirmation
// to the user, i.e., "Do you really want to quit?", but you should probably
// just wrap things up and call DestroyWindow.)
func (w *Window) WMGracefulClose(cb func(w *Window)) {
// Get the current protocols so we don't overwrite anything.
prots, _ := icccm.WmProtocolsGet(w.X, w.Id)
// If WM_DELETE_WINDOW isn't here, add it. Otherwise, move on.
wmdelete := false
for _, prot := range prots {
if prot == "WM_DELETE_WINDOW" {
wmdelete = true
break
}
}
if !wmdelete {
icccm.WmProtocolsSet(w.X, w.Id, append(prots, "WM_DELETE_WINDOW"))
}
// Attach a ClientMessage event handler. It will determine whether the
// ClientMessage is a 'close' request, and if so, run the callback 'cb'
// provided.
xevent.ClientMessageFun(
func(X *xgbutil.XUtil, ev xevent.ClientMessageEvent) {
if icccm.IsDeleteProtocol(X, ev) {
cb(w)
}
}).Connect(w.X, w.Id)
}
func (w *Window) handleEvents() {
var noX int32 = 1<<31 - 1
noX++
var lastX, lastY int32 = noX, 0
var button wde.Button
downKeys := map[string]bool{}
for {
e, err := w.conn.WaitForEvent()
if err != nil {
fmt.Println("[go.wde X error] ", err)
continue
}
switch e := e.(type) {
case xproto.ButtonPressEvent:
button = button | buttonForDetail(e.Detail)
var bpe wde.MouseDownEvent
bpe.Which = buttonForDetail(e.Detail)
bpe.Where.X = int(e.EventX)
bpe.Where.Y = int(e.EventY)
lastX = int32(e.EventX)
lastY = int32(e.EventY)
w.events <- bpe
case xproto.ButtonReleaseEvent:
button = button & ^buttonForDetail(e.Detail)
var bue wde.MouseUpEvent
bue.Which = buttonForDetail(e.Detail)
bue.Where.X = int(e.EventX)
bue.Where.Y = int(e.EventY)
lastX = int32(e.EventX)
lastY = int32(e.EventY)
w.events <- bue
case xproto.LeaveNotifyEvent:
var wee wde.MouseExitedEvent
wee.Where.X = int(e.EventX)
wee.Where.Y = int(e.EventY)
if lastX != noX {
wee.From.X = int(lastX)
wee.From.Y = int(lastY)
} else {
wee.From.X = wee.Where.X
wee.From.Y = wee.Where.Y
}
lastX = int32(e.EventX)
lastY = int32(e.EventY)
w.events <- wee
case xproto.EnterNotifyEvent:
var wee wde.MouseEnteredEvent
wee.Where.X = int(e.EventX)
wee.Where.Y = int(e.EventY)
if lastX != noX {
wee.From.X = int(lastX)
wee.From.Y = int(lastY)
} else {
wee.From.X = wee.Where.X
wee.From.Y = wee.Where.Y
}
lastX = int32(e.EventX)
lastY = int32(e.EventY)
w.events <- wee
case xproto.MotionNotifyEvent:
var mme wde.MouseMovedEvent
mme.Where.X = int(e.EventX)
mme.Where.Y = int(e.EventY)
if lastX != noX {
mme.From.X = int(lastX)
mme.From.Y = int(lastY)
} else {
mme.From.X = mme.Where.X
mme.From.Y = mme.Where.Y
}
lastX = int32(e.EventX)
lastY = int32(e.EventY)
if button == 0 {
w.events <- mme
} else {
var mde wde.MouseDraggedEvent
mde.MouseMovedEvent = mme
mde.Which = button
w.events <- mde
}
case xproto.KeyPressEvent:
var ke wde.KeyEvent
code := keybind.LookupString(w.xu, e.State, e.Detail)
ke.Key = keyForCode(code)
w.events <- wde.KeyDownEvent(ke)
downKeys[ke.Key] = true
kpe := wde.KeyTypedEvent{
KeyEvent: ke,
Glyph: letterForCode(code),
Chord: wde.ConstructChord(downKeys),
}
w.events <- kpe
case xproto.KeyReleaseEvent:
var ke wde.KeyUpEvent
ke.Key = keyForCode(keybind.LookupString(w.xu, e.State, e.Detail))
delete(downKeys, ke.Key)
w.events <- ke
case xproto.ConfigureNotifyEvent:
var re wde.ResizeEvent
re.Width = int(e.Width)
re.Height = int(e.Height)
if re.Width != w.width || re.Height != w.height {
w.width, w.height = re.Width, re.Height
w.bufferLck.Lock()
w.buffer.Destroy()
w.buffer = xgraphics.New(w.xu, image.Rect(0, 0, re.Width, re.Height))
w.bufferLck.Unlock()
w.events <- re
}
case xproto.ClientMessageEvent:
if icccm.IsDeleteProtocol(w.xu, xevent.ClientMessageEvent{&e}) {
w.events <- wde.CloseEvent{}
}
case xproto.DestroyNotifyEvent:
case xproto.ReparentNotifyEvent:
case xproto.MapNotifyEvent:
case xproto.UnmapNotifyEvent:
case xproto.PropertyNotifyEvent:
default:
fmt.Printf("unhandled event: type %T\n%+v\n", e, e)
}
}
close(w.events)
}