func New() *Window {
xWnd := C.XCreateWindow(
dpy,
root,
0,
0,
500,
500,
0,
C.XDefaultDepth(dpy, 0),
C.InputOutput,
C.XDefaultVisual(dpy, 0),
C.CWBackPixel,
&attributes,
)
wdw := C.CString("WM_DELETE_WINDOW")
wmDelete := C.XInternAtom(dpy, wdw, 1)
C.free(unsafe.Pointer(wdw))
fmt.Println(wmDelete)
C.XSetWMProtocols(dpy, xWnd, &wmDelete, 1)
C.XSelectInput(dpy, xWnd, C.ExposureMask|C.KeyPressMask)
C.XMapWindow(dpy, xWnd)
wnd := &Window{
id: uintptr(xWnd),
}
wndMap[wnd.id] = wnd
return wnd
}
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 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
}
// Resize handles a resize of the window.
func (win *Window) resize(w, h int) {
if win.width == w && win.height == h {
return
}
win.width, win.height = w, h
if win.winSurface == nil {
visual := C.XDefaultVisual(win.dpy.dpy, 0)
win.winSurface = cairo.XlibSurfaceCreate(
unsafe.Pointer(win.dpy.dpy), uint64(win.xw), unsafe.Pointer(visual),
w, h)
} else {
win.winSurface.SetSize(w, h)
}
win.bufSurface = &cairo.XlibSurface{win.winSurface.CreateSimilar(cairo.ContentColor, w, h)}
cr := cairo.Create(win.bufSurface.Surface)
win.delegate.Draw(cr)
win.repaint(0, 0, w, h)
}