func (s *screenImpl) setProperty(xw xproto.Window, prop xproto.Atom, values ...xproto.Atom) {
b := make([]byte, len(values)*4)
for i, v := range values {
b[4*i+0] = uint8(v >> 0)
b[4*i+1] = uint8(v >> 8)
b[4*i+2] = uint8(v >> 16)
b[4*i+3] = uint8(v >> 24)
}
xproto.ChangeProperty(s.xc, xproto.PropModeReplace, xw, prop, xproto.AtomAtom, 32, uint32(len(values)), b)
}
func Open(c *xgb.Conn, ctx, title, text string) (*Window, error) {
gc, ok := ctxs[ctx]
if !ok {
return nil, BadContextError(ctx)
}
scr := xproto.Setup(c).DefaultScreen(c)
wdwid, err := xproto.NewWindowId(c)
if err != nil {
return nil, err
}
lines := cutLines(c, gc.width-2*gc.border, gc.font, text)
height := uint32(len(lines)) * gc.fontHeight
var mask uint32 = xproto.CwBackPixel | xproto.CwOverrideRedirect | xproto.CwEventMask
values := make([]uint32, 3)
values[0] = scr.WhitePixel
values[1] = 1
values[2] = xproto.EventMaskExposure
err = xproto.CreateWindowChecked(c, xproto.WindowClassCopyFromParent, wdwid, scr.Root,
0, 0, uint16(gc.width), uint16(height+2*gc.border), 1,
xproto.WindowClassInputOutput, scr.RootVisual,
mask, values).Check()
if err != nil {
return nil, err
}
xproto.ChangeProperty(c, xproto.PropModeReplace, wdwid,
xproto.AtomWmName, xproto.AtomString,
8, uint32(len(title)), []byte(title))
var wdw Window
wdw.id = wdwid
wdw.conn = c
wdw.lines = lines
wdw.gc = gc
wdw.geom = types.Geometry{0, 0, int32(gc.width), int32(height + 2*gc.border)}
return &wdw, nil
}
func main() {
// Open the connection to the X server
X, err := xgb.NewConn()
if err != nil {
log.Fatal(err)
}
defer X.Close()
// geometric objects
points := []xproto.Point{
{10, 10},
{10, 20},
{20, 10},
{20, 20}}
polyline := []xproto.Point{
{50, 10},
{5, 20}, // rest of points are relative
{25, -20},
{10, 10}}
segments := []xproto.Segment{
{100, 10, 140, 30},
{110, 25, 130, 60}}
rectangles := []xproto.Rectangle{
{10, 50, 40, 20},
{80, 50, 10, 40}}
arcs := []xproto.Arc{
{10, 100, 60, 40, 0, 90 << 6},
{90, 100, 55, 40, 0, 270 << 6}}
setup := xproto.Setup(X)
// Get the first screen
screen := setup.DefaultScreen(X)
// Create black (foreground) graphic context
foreground, _ := xproto.NewGcontextId(X)
mask := uint32(xproto.GcForeground | xproto.GcGraphicsExposures)
values := []uint32{screen.BlackPixel, 0}
xproto.CreateGC(X, foreground, xproto.Drawable(screen.Root), mask, values)
// Ask for our window's Id
win, _ := xproto.NewWindowId(X)
winDrawable := xproto.Drawable(win)
// Create the window
mask = uint32(xproto.CwBackPixel | xproto.CwEventMask)
values = []uint32{screen.WhitePixel, xproto.EventMaskExposure}
xproto.CreateWindow(X, // Connection
screen.RootDepth, // Depth
win, // Window Id
screen.Root, // Parent Window
0, 0, // x, y
150, 150, // width, height
10, // border_width
xproto.WindowClassInputOutput, // class
screen.RootVisual, // visual
mask, values) // masks
// Map the window on the screen
xproto.MapWindow(X, win)
// Obey the window-delete protocol
tp := "WM_PROTOCOLS"
prp := "WM_DELETE_WINDOW"
typeAtom, _ := xproto.InternAtom(X, true, uint16(len(tp)), tp).Reply()
propertyAtom, _ := xproto.InternAtom(X, true, uint16(len(prp)), prp).Reply()
// It turns out that we need the window ID as a byte-stream... WTF!!
// xprop.ChangeProp(xu, win, 8, "WM_NAME", "STRING", ([]byte)(name))
// ChangeProp(xu *xgbutil.XUtil, win xproto.Window, format byte, prop string, typ string, data []byte)
data := make([]byte, 4)
xgb.Put32(data, uint32(propertyAtom.Atom))
xproto.ChangeProperty(X, xproto.PropModeReplace, win, typeAtom.Atom, xproto.AtomAtom, 32, 1, data)
for {
evt, err := X.WaitForEvent()
fmt.Printf("An event of type %T occured.\n", evt)
if evt == nil && err == nil {
fmt.Println("Exiting....")
return
} else if err != nil {
log.Fatal(err)
}
switch event := evt.(type) {
case xproto.ExposeEvent:
/* We draw the points */
xproto.PolyPoint(X, xproto.CoordModeOrigin, winDrawable, foreground, points)
/* We draw the polygonal line */
xproto.PolyLine(X, xproto.CoordModePrevious, winDrawable, foreground, polyline)
/* We draw the segments */
xproto.PolySegment(X, winDrawable, foreground, segments)
/* We draw the rectangles */
xproto.PolyRectangle(X, winDrawable, foreground, rectangles)
/* We draw the arcs */
xproto.PolyArc(X, winDrawable, foreground, arcs)
case xproto.ClientMessageEvent:
if len(event.Data.Data32) > 0 {
data := xproto.Atom(event.Data.Data32[0])
if data == propertyAtom.Atom {
return
} else {
atomName, _ := xproto.GetAtomName(X, data).Reply()
fmt.Println(atomName.Name)
}
} else {
atomName, _ := xproto.GetAtomName(X, event.Type).Reply()
fmt.Println(atomName.Name)
}
default:
/* Unknown event type, ignore it */
}
}
return
}
func main() {
// Open the connection to the X server
X, err := xgb.NewConn()
if err != nil {
log.Fatal(err)
}
defer X.Close()
setup := xproto.Setup(X)
// Get the first screen
screen := setup.DefaultScreen(X)
// Replace existing window manager
wmName := fmt.Sprintf("WM_S%d", X.DefaultScreen)
managerAtom, err := xproto.InternAtom(X, true, uint16(len(wmName)), wmName).Reply()
if err != nil {
log.Fatal(err)
}
fakeWindow, _ := xproto.NewWindowId(X)
xproto.CreateWindow(X, // Connection
screen.RootDepth, // Depth
fakeWindow, // Window Id
screen.Root, // Parent Window
-1000, -1000, // x, y
1, 1, // width, height
0, // border_width
xproto.WindowClassInputOutput, // class
screen.RootVisual, // visual
xproto.CwEventMask|xproto.CwOverrideRedirect,
[]uint32{1, xproto.EventMaskPropertyChange}) // masks
xproto.MapWindow(X, fakeWindow)
err = xproto.SetSelectionOwnerChecked(X, fakeWindow, managerAtom.Atom, xproto.TimeCurrentTime).Check()
if err != nil {
fmt.Println("foo")
log.Fatal(err)
}
arcs := []xproto.Arc{
{10, 100, 60, 40, 0, 90 << 6},
{90, 100, 55, 40, 0, 270 << 6}}
// Create black (foreground) graphic context
foreground, _ := xproto.NewGcontextId(X)
mask := uint32(xproto.GcForeground | xproto.GcGraphicsExposures)
values := []uint32{screen.BlackPixel, 0}
xproto.CreateGC(X, foreground, xproto.Drawable(screen.Root), mask, values)
// Ask for our window's Id
win, _ := xproto.NewWindowId(X)
winDrawable := xproto.Drawable(win)
// Create the window
mask = uint32(xproto.CwBackPixel | xproto.CwEventMask)
values = []uint32{screen.WhitePixel, xproto.EventMaskExposure}
xproto.CreateWindow(X, // Connection
screen.RootDepth, // Depth
win, // Window Id
screen.Root, // Parent Window
0, 0, // x, y
150, 150, // width, height
10, // border_width
xproto.WindowClassInputOutput, // class
screen.RootVisual, // visual
mask, values) // masks
// Map the window on the screen
xproto.MapWindow(X, win)
// Obey the window-delete protocol
tp := "WM_PROTOCOLS"
prp := "WM_DELETE_WINDOW"
typeAtom, _ := xproto.InternAtom(X, true, uint16(len(tp)), tp).Reply()
propertyAtom, _ := xproto.InternAtom(X, true, uint16(len(prp)), prp).Reply()
data := make([]byte, 4)
xgb.Put32(data, uint32(propertyAtom.Atom))
xproto.ChangeProperty(X, xproto.PropModeReplace, win, typeAtom.Atom, xproto.AtomAtom, 32, 1, data)
// Main loop
for {
evt, err := X.WaitForEvent()
fmt.Printf("An event of type %T occured.\n", evt)
if evt == nil && err == nil {
fmt.Println("Exiting....")
return
} else if err != nil {
log.Fatal(err)
}
switch event := evt.(type) {
case xproto.ExposeEvent:
/* We draw the arcs */
xproto.PolyArc(X, winDrawable, foreground, arcs)
case xproto.ClientMessageEvent:
if len(event.Data.Data32) > 0 {
data := xproto.Atom(event.Data.Data32[0])
if data == propertyAtom.Atom {
return
} else {
atomName, _ := xproto.GetAtomName(X, data).Reply()
fmt.Println(atomName.Name)
}
} else {
atomName, _ := xproto.GetAtomName(X, event.Type).Reply()
fmt.Println(atomName.Name)
}
default:
/* Unknown event type, ignore it */
}
}
return
}
func setWindowTitle(title []byte, X *xgb.Conn, window xproto.Window) {
xproto.ChangeProperty(X, xproto.PropModeReplace, window, xproto.AtomWmName,
xproto.AtomString, byte(8), uint32(len(title)), title)
}