func XMain(callbacks Callbacks) {
dpy := C.XOpenDisplay(nil)
w := C.XCreateSimpleWindow(dpy, C.XDefaultRootWindow(dpy),
0, 0, 600, 400,
0, 0, 0)
C.XSelectInput(dpy, w, C.StructureNotifyMask|C.SubstructureNotifyMask|C.ExposureMask)
C.XMapWindow(dpy, w)
win := Window{dpy: dpy, xw: w}
visual := C.XDefaultVisual(dpy, 0)
surf := cairo.XlibSurfaceCreate(unsafe.Pointer(dpy), uint64(win.xw), unsafe.Pointer(visual), 10, 10)
for {
var e C.XEvent
C.XNextEvent(dpy, &e)
typ := XEventType(*(*C.int)(unsafe.Pointer(&e)))
// log.Printf("X event: %s", typ)
switch typ {
case C.ConfigureNotify:
e := (*C.XConfigureEvent)(unsafe.Pointer(&e))
surf.SetSize(int(e.width), int(e.height))
case C.Expose:
cr := cairo.Create(surf.Surface)
callbacks.Draw(cr, surf)
default:
// log.Printf("unknown X event %s", typ)
}
}
}
func (d *Display) NewWindow(delegate ui.WinDelegate) ui.Win {
w := C.XCreateSimpleWindow(d.dpy, C.XDefaultRootWindow(d.dpy),
0, 0, 640, 400,
0, 0, C.XWhitePixel(d.dpy, 0))
C.XSelectInput(d.dpy, w, C.StructureNotifyMask|C.SubstructureNotifyMask|C.ExposureMask|C.KeyPress|C.KeyRelease|C.ButtonPress)
C.XMapWindow(d.dpy, w)
return &Window{
delegate: delegate,
dpy: d,
xw: w,
}
}
func (window *XWindow) Create(width uint, height uint, title string) bool {
dpy := C.XOpenDisplay(nil)
scr := C.XDefaultScreen(dpy)
root := C.XDefaultRootWindow(dpy)
win := C.XCreateSimpleWindow(dpy, root, 0, 0, C.uint(width), C.uint(height), 0, C.XBlackPixel(dpy, scr), C.XBlackPixel(dpy, scr))
C.XStoreName(dpy, win, C.CString(title))
C.XMapWindow(dpy, win)
window.dpy = dpy
return true
}
func Screen() (C.uint, C.uint, C.uint) {
//
d := C.CString(dspl)
defer C.free(unsafe.Pointer(d))
display = C.XOpenDisplay(d)
if display == nil {
panic("display == nil") /* Terminate (); */ os.Exit(1)
}
window0 = C.XDefaultRootWindow(display)
screen = C.XDefaultScreen(display)
return C.uint(C.XDisplayWidth(display, screen)),
C.uint(C.XDisplayHeight(display, screen)),
C.uint(C.XDefaultDepth(display, screen))
}
func CreateXWindow(width, height int) (*XWindow, error) {
C.XInitThreads()
W := &XWindow{}
W.Display = C.XOpenDisplay(nil)
if W.Display == nil {
return &XWindow{}, errors.New("Can't open display")
}
W.Window = C.XCreateSimpleWindow(W.Display, C.XDefaultRootWindow(W.Display), 0, 0, C.uint(width), C.uint(height), 0, 0, 0xFF151515)
C.XSetWindowBackgroundPixmap(W.Display, W.Window, 0) // This avoids flickering on resize
C.XMapWindow(W.Display, W.Window)
C.XStoreName(W.Display, W.Window, C.CString("gowitt"))
C.XSelectInput(W.Display, W.Window, C.ExposureMask|C.KeyPressMask|C.ButtonPressMask)
C.XFlush(W.Display)
// Cairo
W.Surface = C.cairo_xlib_surface_create(W.Display, C.Drawable(W.Window), C.XDefaultVisual(W.Display, 0), C.int(width), C.int(height))
C.cairo_xlib_surface_set_size(W.Surface, C.int(width), C.int(height))
W.Cairo = C.cairo_create(W.Surface)
// Pango
InitLayoutsCache(W.Cairo)
W.PangoContext = C.pango_cairo_create_context(W.Cairo)
W.FontDesc = C.pango_font_description_from_string(C.CString("Sans 10"))
W.AttrList = C.pango_attr_list_new()
placeholderImage = C.cairo_image_surface_create_from_png(C.CString("test.png"))
W.UserImages = NewImageCache(func() {
var ev C.XEvent
exev := (*C.XExposeEvent)(unsafe.Pointer(&ev))
exev._type = C.Expose
exev.count = 0
exev.window = W.Window
exev.send_event = 1
exev.display = W.Display
C.XSendEvent(W.Display, W.Window, 0, C.ExposureMask, &ev)
C.XFlush(W.Display)
})
return W, nil
}
func setStatus(status string) {
C.XStoreName(dpy, C.XDefaultRootWindow(dpy), C.CString(status))
C.XSync(dpy, 1)
}
func main() {
var dpy *C.Display
var attr C.XWindowAttributes
var start C.XButtonEvent
var ev C.XEvent
var ch *C.char
if dpy != C.XOpenDisplay(ch) {
return
}
C.XGrabKey(
dpy,
C.int(C.XKeysymToKeycode(dpy, C.XStringToKeysym(C.CString("F1")))),
C.Mod1Mask,
C.XDefaultRootWindow(dpy),
1,
C.GrabModeAsync,
C.GrabModeAsync,
)
C.XGrabButton(
dpy,
1,
C.Mod1Mask,
C.XDefaultRootWindow(dpy),
1,
C.ButtonPressMask|C.ButtonReleaseMask|C.PointerMotionMask,
C.GrabModeAsync,
C.GrabModeAsync,
C.None,
C.None,
)
C.XGrabButton(
dpy,
3,
C.Mod1Mask,
C.XDefaultRootWindow(dpy),
1,
C.ButtonPressMask|C.ButtonReleaseMask|C.PointerMotionMask,
C.GrabModeAsync,
C.GrabModeAsync,
C.None,
C.None,
)
start.subwindow = C.None
for {
C.XNextEvent(dpy, &ev)
if unionToInt(ev) == C.KeyPress && unionToXKeyEvent(ev).subwindow != C.None {
C.XRaiseWindow(dpy, unionToXKeyEvent(ev).subwindow)
} else if unionToInt(ev) == C.ButtonPress && unionToXButtonEvent(ev).subwindow != C.None {
C.XGetWindowAttributes(dpy, unionToXButtonEvent(ev).subwindow, &attr)
start = *unionToXButtonEvent(ev)
} else if unionToInt(ev) == C.MotionNotify && start.subwindow != C.None {
xdiff := unionToXButtonEvent(ev).x_root - start.x_root
ydiff := unionToXButtonEvent(ev).y_root - start.y_root
var toDiffX C.int
var toDiffY C.int
if start.button == 1 {
toDiffX = xdiff
toDiffY = ydiff
}
var toWidth C.int
var toHeight C.int
if start.button == 3 {
toWidth = xdiff
toHeight = ydiff
}
C.XMoveResizeWindow(
dpy,
start.subwindow,
attr.x+toDiffX,
attr.y+toDiffY,
max(1, attr.width+toWidth),
max(1, attr.height+toHeight))
} else if unionToInt(ev) == C.ButtonRelease {
start.subwindow = C.None
}
}
}
func setStatus(s *C.char) {
C.XStoreName(dpy, C.XDefaultRootWindow(dpy), s)
C.XSync(dpy, 1)
}