// create creates the window, initializes the keybind and mousebind packages
// and sets up the window to act like a real top-level client.
func (w *window) create() {
keybind.Initialize(w.X)
mousebind.Initialize(w.X)
err := w.CreateChecked(w.X.RootWin(), 0, 0, flagWidth, flagHeight,
xproto.CwBackPixel, 0xffffff)
if err != nil {
errLg.Fatalf("Could not create window: %s", err)
}
// Make the window close gracefully using the WM_DELETE_WINDOW protocol.
w.WMGracefulClose(func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
keybind.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
w.Destroy()
xevent.Quit(w.X)
})
// Set WM_STATE so it is interpreted as top-level and is mapped.
err = icccm.WmStateSet(w.X, w.Id, &icccm.WmState{
State: icccm.StateNormal,
})
if err != nil { // not a fatal error
lg("Could not set WM_STATE: %s", err)
}
// _NET_WM_STATE = _NET_WM_STATE_NORMAL
ewmh.WmStateSet(w.X, w.Id, []string{"_NET_WM_STATE_NORMAL"})
// Set the name to something.
w.nameSet("Decoding all images...")
w.Map()
}
// This is a slightly modified version of xgraphics.XShowExtra that does
// not set any resize constraints on the window (so that it can go
// fullscreen).
func showImage(im *xgraphics.Image, name string, quit bool) *xwindow.Window {
if len(name) == 0 {
name = "xgbutil Image Window"
}
w, h := im.Rect.Dx(), im.Rect.Dy()
win, err := xwindow.Generate(im.X)
if err != nil {
xgbutil.Logger.Printf("Could not generate new window id: %s", err)
return nil
}
// Create a very simple window with dimensions equal to the image.
win.Create(im.X.RootWin(), 0, 0, w, h, 0)
// Make this window close gracefully.
win.WMGracefulClose(func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
keybind.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
w.Destroy()
if quit {
xevent.Quit(w.X)
}
})
// Set WM_STATE so it is interpreted as a top-level window.
err = icccm.WmStateSet(im.X, win.Id, &icccm.WmState{
State: icccm.StateNormal,
})
if err != nil { // not a fatal error
xgbutil.Logger.Printf("Could not set WM_STATE: %s", err)
}
// Set _NET_WM_NAME so it looks nice.
err = ewmh.WmNameSet(im.X, win.Id, name)
if err != nil { // not a fatal error
xgbutil.Logger.Printf("Could not set _NET_WM_NAME: %s", err)
}
// Paint our image before mapping.
im.XSurfaceSet(win.Id)
im.XDraw()
im.XPaint(win.Id)
// Now we can map, since we've set all our properties.
// (The initial map is when the window manager starts managing.)
win.Map()
return win
}
func bindall(configfile string, X *xgbutil.XUtil) (err error) {
config, err := ioutil.ReadFile(configfile)
if err != nil {
log.Fatal("Could not find config file: ", err)
return
}
hotkeys := []Hotkey{}
err = json.Unmarshal(config, &hotkeys)
if err != nil {
log.Fatal("Could not parse config file:", err)
return
}
keybind.Detach(X, X.RootWin())
for _, hotkey := range hotkeys {
hotkey.attach(X)
}
return
}
// newWindow creates the window, initializes the keybind and mousebind packages
// and sets up the window to act like a real top-level client.
func newWindow(X *xgbutil.XUtil) *Window {
w, err := xwindow.Generate(X)
if err != nil {
errLg.Fatalf("Could not create window: %s", err)
}
keybind.Initialize(w.X)
mousebind.Initialize(w.X)
err = w.CreateChecked(w.X.RootWin(), 0, 0, 600, 600, xproto.CwBackPixel, 0xffffff)
if err != nil {
errLg.Fatalf("Could not create window: %s", err)
}
// Make the window close gracefully using the WM_DELETE_WINDOW protocol.
w.WMGracefulClose(func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
keybind.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
w.Destroy()
xevent.Quit(w.X)
})
// Set WM_STATE so it is interpreted as top-level and is mapped.
err = icccm.WmStateSet(w.X, w.Id, &icccm.WmState{State: icccm.StateNormal})
if err != nil {
lg("Could not set WM_STATE: %s", err)
}
// _NET_WM_STATE = _NET_WM_STATE_NORMAL
// not needed because we we set FS later anyway?
//ewmh.WmStateSet(w.X, w.Id, []string{"_NET_WM_STATE_NORMAL"})
w.Map()
err = ewmh.WmStateReq(w.X, w.Id, ewmh.StateToggle, "_NET_WM_STATE_FULLSCREEN")
if err != nil {
lg("Failed to go FullScreen:", err)
}
return &Window{w}
}
func NewWindow() *Window {
win, err := xwindow.Generate(X)
if err != nil {
log.Fatal("cannot generate window %v\n", err)
return nil
}
width, height := 800, 600
win.Create(X.RootWin(), 0, 0, width, height, xproto.CwBackPixel, 0x0)
win.WMGracefulClose(func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
keybind.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
w.Destroy()
xevent.Quit(w.X)
})
icccm.WmStateSet(X, win.Id, &icccm.WmState{
State: icccm.StateNormal,
})
win.Listen(xproto.EventMaskKeyPress)
win.Clear(0, 0, 0, 0)
win.Map()
self := &Window{
win,
nil,
false,
nil,
}
self.bindKeys()
return self
}
// Detach will detach this window's event handlers from all xevent, keybind
// and mousebind callbacks.
func (w *Window) Detach() {
keybind.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
xevent.Detach(w.X, w.Id)
}
func makeWindow(ximage *xgraphics.Image) (*xwindow.Window, *bool) {
w, h := ximage.Rect.Dx(), ximage.Rect.Dy()
window, err := xwindow.Generate(ximage.X)
if err != nil {
xgbutil.Logger.Printf("Could not generate new window id: %s", err)
return nil, nil
}
window.Create(ximage.X.RootWin(), 0, 0, w, h, xproto.CwBackPixel, 0x00000000)
window.Listen(xproto.EventMaskExposure,
xproto.EventMaskKeyPress,
xproto.EventMaskStructureNotify,
xproto.EventMaskVisibilityChange)
window.WMGracefulClose(func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
keybind.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
w.Destroy()
xevent.Quit(w.X)
})
err = icccm.WmStateSet(ximage.X, window.Id, &icccm.WmState{
State: icccm.StateNormal,
})
if err != nil {
xgbutil.Logger.Printf("Could not set WM_STATE: %s", err)
}
err = ewmh.WmNameSet(ximage.X, window.Id, "Computer System Monitor")
if err != nil {
xgbutil.Logger.Printf("Could not set _NET_WM_NAME: %s", err)
}
err = keybind.KeyPressFun(
func(X *xgbutil.XUtil, ev xevent.KeyPressEvent) {
err := ewmh.WmStateReq(ximage.X, window.Id, ewmh.StateToggle,
"_NET_WM_STATE_FULLSCREEN")
if err != nil {
log.Fatal(err)
}
}).Connect(ximage.X, window.Id, "f", false)
if err != nil {
log.Fatal(err)
}
xevent.ExposeFun(
func(xu *xgbutil.XUtil, event xevent.ExposeEvent) {
ximage.XExpPaint(window.Id, 0, 0)
}).Connect(ximage.X, window.Id)
obscured := false
xevent.VisibilityNotifyFun(
func(xu *xgbutil.XUtil, event xevent.VisibilityNotifyEvent) {
obscured = event.State == xproto.VisibilityFullyObscured
}).Connect(ximage.X, window.Id)
window.Map()
return window, &obscured
}
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)
}
