func (d *Display) NewKeyBinding(f func(), key string) error {
err := keybind.KeyReleaseFun(
func(X *xgbutil.XUtil, e xevent.KeyReleaseEvent) {
f()
}).Connect(d.x, d.x.RootWin(), key, true)
if err != nil {
return err
}
return nil
}
func (kcmd keyCommand) attach(run func()) {
if run == nil {
return
}
if kcmd.cmd == "PromptCyclePrev" || kcmd.cmd == "PromptCycleNext" {
// We've got to parse the key string first and make sure
// there are some modifiers; otherwise this utterly fails!
mods, _, _ := keybind.ParseString(X, kcmd.keyStr)
if mods == 0 {
logger.Warning.Printf("Sorry but the key binding '%s' for the %s "+
"command is invalid. It must have a modifier "+
"to work properly. i.e., Mod1-tab where 'Mod1' "+
"is the modifier.", kcmd.keyStr, kcmd.cmd)
return
}
keybind.KeyPressFun(
func(X *xgbutil.XUtil, ev xevent.KeyPressEvent) {
run()
}).Connect(X, wingo.root.Id, kcmd.keyStr, true)
keybind.KeyPressFun(
func(X *xgbutil.XUtil, ev xevent.KeyPressEvent) {
run()
}).Connect(X, X.Dummy(), kcmd.keyStr, true)
} else {
if kcmd.down {
keybind.KeyPressFun(
func(X *xgbutil.XUtil, ev xevent.KeyPressEvent) {
run()
}).Connect(X, wingo.root.Id, kcmd.keyStr, true)
} else {
keybind.KeyReleaseFun(
func(X *xgbutil.XUtil, ev xevent.KeyReleaseEvent) {
run()
}).Connect(X, wingo.root.Id, kcmd.keyStr, true)
}
}
}
func (kcmd keyCommand) attach() {
if kcmd.cmdName == "CycleClientPrev" || kcmd.cmdName == "CycleClientNext" {
// We've got to parse the key string first and make sure
// there are some modifiers; otherwise this utterly fails!
mods, _, _ := keybind.ParseString(X, kcmd.keyStr)
if mods == 0 {
logger.Warning.Printf("Sorry but the key binding '%s' for the %s "+
"command is invalid. It must have a modifier "+
"to work properly. i.e., Mod1-tab where 'Mod1' "+
"is the modifier.", kcmd.keyStr, kcmd.cmdName)
return
}
run, err := cmdHacks.CycleClientRunWithKeyStr(kcmd.keyStr, kcmd.cmdStr)
if err != nil {
logger.Warning.Printf("Could not setup %s: %s", kcmd.cmdName, err)
return
}
err = keybind.KeyPressFun(
func(X *xgbutil.XUtil, ev xevent.KeyPressEvent) {
go run()
}).Connect(X, Root.Id, kcmd.keyStr, true)
if err != nil {
logger.Warning.Printf("Could not bind '%s': %s", kcmd.keyStr, err)
}
err = keybind.KeyPressFun(
func(X *xgbutil.XUtil, ev xevent.KeyPressEvent) {
go run()
}).Connect(X, X.Dummy(), kcmd.keyStr, true)
if err != nil {
logger.Warning.Printf("Could not bind '%s': %s", kcmd.keyStr, err)
}
} else {
run := func() {
go func() {
_, err := gribbleEnv.Run(kcmd.cmdStr)
if err != nil {
logger.Warning.Println(err)
}
}()
}
if kcmd.down {
err := keybind.KeyPressFun(
func(X *xgbutil.XUtil, ev xevent.KeyPressEvent) {
run()
}).Connect(X, Root.Id, kcmd.keyStr, true)
if err != nil {
logger.Warning.Printf("Could not bind '%s': %s",
kcmd.keyStr, err)
}
} else {
err := keybind.KeyReleaseFun(
func(X *xgbutil.XUtil, ev xevent.KeyReleaseEvent) {
run()
}).Connect(X, Root.Id, kcmd.keyStr, true)
if err != nil {
logger.Warning.Printf("Could not bind '%s': %s",
kcmd.keyStr, err)
}
}
}
}
func main() {
// Connect to the X server using the DISPLAY environment variable.
X, err := xgbutil.NewConn()
if err != nil {
log.Fatal(err)
}
// Anytime the keybind (mousebind) package is used, keybind.Initialize
// *should* be called once. It isn't strictly necessary, but allows your
// keybindings to persist even if the keyboard mapping is changed during
// run-time. (Assuming you're using the xevent package's event loop.)
keybind.Initialize(X)
// Before attaching callbacks, wrap them in a callback function type.
// The keybind package exposes two such callback types: keybind.KeyPressFun
// and keybind.KeyReleaseFun.
cb1 := keybind.KeyPressFun(
func(X *xgbutil.XUtil, e xevent.KeyPressEvent) {
log.Println("Key press!")
})
// We can now attach the callback to a particular window and key
// combination. This particular example grabs a key on the root window,
// which makes it a global keybinding.
// Also, "Mod4-j" typically corresponds to pressing down the "Super" or
// "Windows" key on your keyboard, and then pressing the letter "j".
// N.B. This approach works by issuing a passive grab on the window
// specified. To respond to Key{Press,Release} events without a grab, use
// the xevent.Key{Press,Release}Fun callback function types instead.
err = cb1.Connect(X, X.RootWin(), "Mod4-j", true)
// A keybinding can fail if the key string could not be parsed, or if you're
// trying to bind a key that has already been grabbed by another client.
if err != nil {
log.Fatal(err)
}
// We can even attach multiple callbacks to the same key.
err = keybind.KeyPressFun(
func(X *xgbutil.XUtil, e xevent.KeyPressEvent) {
log.Println("A second handler always happens after the first.")
}).Connect(X, X.RootWin(), "Mod4-j", true)
if err != nil {
log.Fatal(err)
}
// Finally, if we want this client to stop responding to key events, we
// can attach another handler that, when run, detaches all previous
// handlers.
// This time, we'll show an example of a KeyRelease binding.
err = keybind.KeyReleaseFun(
func(X *xgbutil.XUtil, e xevent.KeyReleaseEvent) {
// Use keybind.Detach to detach the root window
// from all KeyPress *and* KeyRelease handlers.
keybind.Detach(X, X.RootWin())
log.Printf("Detached all Key{Press,Release}Events from the "+
"root window (%d).", X.RootWin())
}).Connect(X, X.RootWin(), "Mod4-Shift-q", true)
if err != nil {
log.Fatal(err)
}
// Finally, start the main event loop. This will route any appropriate
// KeyPressEvents to your callback function.
log.Println("Program initialized. Start pressing keys!")
xevent.Main(X)
}