Example #1
0
// newWindow creates a new window with a random background color. It sets the
// WM_PROTOCOLS property to contain the WM_DELETE_WINDOW atom. It also sets
// up a ClientMessage event handler so that we know when to destroy the window.
// We also set up a mouse binding so that clicking inside a window will
// create another one.
func newWindow(X *xgbutil.XUtil) {
	counter++
	win, err := xwindow.Generate(X)
	if err != nil {
		log.Fatal(err)
	}

	// Get a random background color, create the window (ask to receive button
	// release events while we're at it) and map the window.
	bgColor := rand.Intn(0xffffff + 1)
	win.Create(X.RootWin(), 0, 0, 200, 200,
		xproto.CwBackPixel|xproto.CwEventMask,
		uint32(bgColor), xproto.EventMaskButtonRelease)

	// WMGracefulClose does all of the work for us. It sets the appropriate
	// values for WM_PROTOCOLS, and listens for ClientMessages that implement
	// the WM_DELETE_WINDOW protocol. When one is found, the provided callback
	// is executed.
	win.WMGracefulClose(
		func(w *xwindow.Window) {
			// Detach all event handlers.
			// This should always be done when a window can no longer
			// receive events.
			xevent.Detach(w.X, w.Id)
			mousebind.Detach(w.X, w.Id)
			w.Destroy()

			// Exit if there are no more windows left.
			counter--
			if counter == 0 {
				os.Exit(0)
			}
		})

	// It's important that the map comes after setting WMGracefulClose, since
	// the WM isn't obliged to watch updates to the WM_PROTOCOLS property.
	win.Map()

	// A mouse binding so that a left click will spawn a new window.
	// Note that we don't issue a grab here. Typically, window managers will
	// grab a button press on the client window (which usually activates the
	// window), so that we'd end up competing with the window manager if we
	// tried to grab it.
	// Instead, we set a ButtonRelease mask when creating the window and attach
	// a mouse binding *without* a grab.
	err = mousebind.ButtonReleaseFun(
		func(X *xgbutil.XUtil, ev xevent.ButtonReleaseEvent) {
			newWindow(X)
		}).Connect(X, win.Id, "1", false, false)
	if err != nil {
		log.Fatal(err)
	}
}
Example #2
0
func NewWindow(width, height int) (wde.Window, error) {
	var err error

	w := new(Window)
	w.width, w.height = width, height

	w.xu, err = xgbutil.NewConn()
	if err != nil {
		return nil, err
	}

	w.conn = w.xu.Conn()
	screen := w.xu.Screen()

	w.win, err = xwindow.Generate(w.xu)
	if err != nil {
		return nil, err
	}

	err = w.win.CreateChecked(screen.Root, 600, 500, width, height, 0)
	if err != nil {
		return nil, err
	}

	w.win.Listen(AllEventsMask)

	err = icccm.WmProtocolsSet(w.xu, w.win.Id, []string{"WM_DELETE_WINDOW"})
	if err != nil {
		fmt.Println(err)
		err = nil
	}

	w.bufferLck = &sync.Mutex{}
	w.buffer = xgraphics.New(w.xu, image.Rect(0, 0, width, height))
	w.buffer.XSurfaceSet(w.win.Id)

	keyMap, modMap := keybind.MapsGet(w.xu)
	keybind.KeyMapSet(w.xu, keyMap)
	keybind.ModMapSet(w.xu, modMap)

	w.events = make(chan interface{})

	w.SetIcon(Gordon)
	w.SetIconName("Go")

	go w.handleEvents()

	return w, nil
}
Example #3
0
// newWindow creates a new window that listens to MotionNotify events with
// the given backgroundcolor.
func newWindow(X *xgbutil.XUtil, color uint32) *xwindow.Window {
	win, err := xwindow.Generate(X)
	if err != nil {
		log.Fatal(err)
	}

	err = win.CreateChecked(X.RootWin(), 0, 0, 400, 400,
		xproto.CwBackPixel|xproto.CwEventMask,
		color, xproto.EventMaskPointerMotion)
	if err != nil {
		log.Fatal(err)
	}

	win.Map()
	return win
}
Example #4
0
func main() {
	X, err := xgbutil.NewConn()
	if err != nil {
		log.Fatal(err)
	}

	// Create the cursor. You can find a list of available cursors in
	// xcursor/cursordef.go.
	// We'll make an umbrella here, with an orange foreground and a blue
	// background. (The background it typically the outline of the cursor.)
	// Note that each component of the RGB color is a 16 bit color. I think
	// using the most significant byte to specify each component is good
	// enough.
	cursor, err := xcursor.CreateCursorExtra(X, xcursor.Umbrella,
		0xff00, 0x5500, 0x0000,
		0x3300, 0x6600, 0xff00)
	if err != nil {
		log.Fatal(err)
	}

	// Create a new window. In the create window request, we'll set the
	// background color and set the cursor we created above.
	// This results in changing the cursor only when it moves into this window.
	win, err := xwindow.Generate(X)
	if err != nil {
		log.Fatal(err)
	}
	win.Create(X.RootWin(), 0, 0, 500, 500,
		xproto.CwBackPixel|xproto.CwCursor,
		0xffffffff, uint32(cursor))
	win.Map()

	// We can free the cursor now that we've set it.
	// If you plan on using this cursor again, then it shouldn't be freed.
	// (i.e., if you try to free this before setting it as the cursor in a
	// window, you'll get a BadCursor error when trying to use it.)
	xproto.FreeCursor(X.Conn(), cursor)

	// Block. No need to process any events.
	select {}
}