func main() {
X, err := xgbutil.NewConn()
if err != nil {
log.Fatal(err)
}
keybind.Initialize(X) // call once before using keybind package
// Read an example gopher image into a regular png image.
img, _, err := image.Decode(bytes.NewBuffer(gopher.GopherPng()))
if err != nil {
log.Fatal(err)
}
// Now convert it into an X image.
ximg := xgraphics.NewConvert(X, img)
// Now show it in a new window.
// We set the window title and tell the program to quit gracefully when
// the window is closed.
// There is also a convenience method, XShow, that requires no parameters.
win := showImage(ximg, "The Go Gopher!", true)
// Listen for key press events.
win.Listen(xproto.EventMaskKeyPress)
err = keybind.KeyPressFun(
func(X *xgbutil.XUtil, ev xevent.KeyPressEvent) {
println("fullscreen!")
err := ewmh.WmStateReq(X, win.Id, ewmh.StateToggle,
"_NET_WM_STATE_FULLSCREEN")
if err != nil {
log.Fatal(err)
}
}).Connect(X, win.Id, "f", false)
if err != nil {
log.Fatal(err)
}
err = keybind.KeyPressFun(
func(X *xgbutil.XUtil, ev xevent.KeyPressEvent) {
println("quit fullscreen!")
err := ewmh.WmStateReq(X, win.Id, ewmh.StateToggle,
"_NET_WM_STATE_FULLSCREEN")
if err != nil {
log.Fatal(err)
}
}).Connect(X, win.Id, "Escape", false)
if err != nil {
log.Fatal(err)
}
// If we don't block, the program will end and the window will disappear.
// We could use a 'select{}' here, but xevent.Main will emit errors if
// something went wrong, so use that instead.
xevent.Main(X)
}
// 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 (self *SessionModule) addState(id xproto.Window, state string) error {
return ewmh.WmStateReq(self.X, id, 0, state)
}
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
}
