func newWindow(X *xgbutil.XUtil) {
win, err := xwindow.Generate(X)
if err != nil {
log.Fatal(err)
}
win.Create(X.RootWin(), 0, 0, 200, 200,
xproto.CwBackPixel|xproto.CwEventMask,
0, xproto.EventMaskButtonRelease)
win.WMGracefulClose(
func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
w.Destroy()
xevent.Quit(X)
Done <- true
})
win.Map()
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)
}
}
func newWindow(controlCh *controlCh, X *xgbutil.XUtil, width, height int) *xwindow.Window {
var (
err error
win *xwindow.Window
)
win, err = xwindow.Generate(X)
if err != nil {
panic(err)
}
win.Create(X.RootWin(), 0, 0, width, height,
xproto.CwBackPixel|xproto.CwEventMask,
0, xproto.EventMaskButtonRelease)
// Xorg application exits when the window is closed.
win.WMGracefulClose(
func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
w.Destroy()
xevent.Quit(X)
controlCh.exit <- true
})
// In order to get ConfigureNotify events, we must listen to the window
// using the 'StructureNotify' mask.
win.Listen(xproto.EventMaskButtonPress |
xproto.EventMaskButtonRelease |
xproto.EventMaskKeyPress |
xproto.EventMaskKeyRelease |
xproto.EventMaskStructureNotify)
win.Map()
return win
}
// 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()
}
func newWindow(X *xgbutil.XUtil, width, height int) *xwindow.Window {
var (
err error
win *xwindow.Window
)
win, err = xwindow.Generate(X)
if err != nil {
log.Fatal(err)
}
win.Create(X.RootWin(), 0, 0, width, height,
xproto.CwBackPixel|xproto.CwEventMask,
0, xproto.EventMaskButtonRelease)
win.WMGracefulClose(
func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
w.Destroy()
xevent.Quit(X)
})
win.Map()
if err != nil {
log.Fatal(err)
}
return win
}
// 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)
}
}
// 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 newWindow(X *xgbutil.XUtil, width, height int) *xwindow.Window {
var (
err error
win *xwindow.Window
)
win, err = xwindow.Generate(X)
if err != nil {
log.Fatal(err)
}
win.Create(X.RootWin(), 0, 0, width, height,
xproto.CwBackPixel|xproto.CwEventMask,
0, xproto.EventMaskButtonRelease)
win.WMGracefulClose(
func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
// w.Destroy()
xevent.Quit(X)
application.Exit()
})
// In order to get ConfigureNotify events, we must listen to the window
// using the 'StructureNotify' mask.
win.Listen(xproto.EventMaskStructureNotify)
win.Map()
xevent.ConfigureNotifyFun(
func(X *xgbutil.XUtil, ev xevent.ConfigureNotifyEvent) {
reshape(int(ev.Width), int(ev.Height))
}).Connect(X, win.Id)
// 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)
}
return win
}
// 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 main() {
// Connect to the X server using the DISPLAY environment variable.
X, err := xgbutil.NewConn()
if err != nil {
log.Fatal(err)
}
// Anytime the mousebind (keybind) package is used, mousebind.Initialize
// *should* be called once. In the case of the mousebind package, this
// isn't strictly necessary, but the 'Drag' features of the mousebind
// package won't work without it.
mousebind.Initialize(X)
// Before attaching callbacks, wrap them in a callback function type.
// The mouse package exposes two such callback types:
// mousebind.ButtonPressFun and mousebind.ButtonReleaseFun.
cb1 := mousebind.ButtonPressFun(
func(X *xgbutil.XUtil, e xevent.ButtonPressEvent) {
log.Println("Button press!")
})
// We can now attach the callback to a particular window and button
// combination. This particular example grabs a button on the root window,
// which makes it a global mouse binding.
// Also, "Mod4-1" typically corresponds to pressing down the "Super" or
// "Windows" key on your keyboard, and then pressing the left mouse button.
// The last two parameters are whether to make a synchronous grab and
// whether to actually issue a grab, respectively.
// (The parameters used here are the common case.)
// See the documentation for the Connect method for more details.
err = cb1.Connect(X, X.RootWin(), "Mod4-1", false, true)
// A mouse binding can fail if the mouse string could not be parsed, or if
// you're trying to bind a button that has already been grabbed by another
// client.
if err != nil {
log.Fatal(err)
}
// We can even attach multiple callbacks to the same button.
err = mousebind.ButtonPressFun(
func(X *xgbutil.XUtil, e xevent.ButtonPressEvent) {
log.Println("A second handler always happens after the first.")
}).Connect(X, X.RootWin(), "Mod4-1", false, true)
if err != nil {
log.Fatal(err)
}
// Finally, if we want this client to stop responding to mouse events, we
// can attach another handler that, when run, detaches all previous
// handlers.
// This time, we'll show an example of a ButtonRelease binding.
err = mousebind.ButtonReleaseFun(
func(X *xgbutil.XUtil, e xevent.ButtonReleaseEvent) {
// Use mousebind.Detach to detach the root window
// from all ButtonPress *and* ButtonRelease handlers.
mousebind.Detach(X, X.RootWin())
mousebind.Detach(X, X.RootWin())
log.Printf("Detached all Button{Press,Release}Events from the "+
"root window (%d).", X.RootWin())
}).Connect(X, X.RootWin(), "Mod4-Shift-1", false, true)
if err != nil {
log.Fatal(err)
}
// Finally, start the main event loop. This will route any appropriate
// ButtonPressEvents to your callback function.
log.Println("Program initialized. Start pressing mouse buttons!")
xevent.Main(X)
}
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
}
// Creates and displays a new plot window.
// Defaults to an all white background with the upper left corner at (0,0).
// If title is "" then the title will be an auto incrementing "Figure - #"
func NewPlotWindow(width, height int, title string) (*PlotWindow, error) {
if width <= 0 {
err := errors.New("Width is negative or 0, this is invalid.")
return nil, err
}
if height <= 0 {
err := errors.New("Height is negative or 0, this is invalid.")
return nil, err
}
system, err := Initialize()
if system == nil {
return nil, err
}
resultantPlotWindow := new(PlotWindow)
win, err := xwindow.Generate(system.X)
if err != nil {
return nil, err
}
resultantPlotWindow.window = win
xpos := 0
ypos := 0
var backgroundColor uint32
backgroundColor = 0xffffffff
// Create window, checked because we want to fail if this doesn't work.
err = win.CreateChecked(
system.X.RootWin(),
xpos,
ypos,
width,
height,
xproto.CwBackPixel|xproto.CwEventMask,
backgroundColor,
xproto.EventMaskButtonRelease)
if err != nil {
return nil, err
}
// Gracefully removes event handling system on window close.
// In addition it removes the plotWindow from the DVSystem which
// sends off all the required plotWindow closing messages.
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()
// We need to remove the plot from the DVSystem list since it's now
// no longer visible.
system.removePlotWindow(resultantPlotWindow)
})
if title == "" {
title = system.getNextPlotWindowDefaultName()
}
resultantPlotWindow.SetTitle(title)
system.addPlotWindow(resultantPlotWindow)
// Show the underlying window
win.Map()
// Hand back the PlotWindow
return resultantPlotWindow, nil
}