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 init() {
//
txt[KeyPress] = "KeyPress"
txt[KeyRelease] = "KeyRelease"
txt[ButtonPress] = "ButtonPress"
txt[ButtonRelease] = "ButtonRelease"
txt[MotionNotify] = "MotionNotify"
txt[EnterNotify] = "EnterNotify"
txt[LeaveNotify] = "LeaveNotify"
txt[FocusIn] = "FocusIn"
txt[FocusOut] = "FocusOut"
txt[KeymapNotify] = "KeymapNotify"
txt[Expose] = "Expose"
txt[GraphicsExpose] = "GraphicsExpose"
txt[NoExpose] = "NoExpose"
txt[VisibilityNotify] = "VisibilityNotify"
txt[CreateNotify] = "CreateNotify"
txt[DestroyNotify] = "DestroyNotify"
txt[UnmapNotify] = "UnmapNotify"
txt[MapNotify] = "MapNotify"
txt[MapRequest] = "MapRequest"
txt[ReparentNotify] = "ReparentNotify"
txt[ConfigureNotify] = "ConfigureNotify"
txt[ConfigureRequest] = "ConfigureRequest"
txt[GravityNotify] = "GravityNotify"
txt[ResizeRequest] = "ResizeRequest"
txt[CirculateNotify] = "CirculateNotify"
txt[CirculateRequest] = "CirculateRequest"
txt[PropertyNotify] = "PropertyNotify"
txt[SelectionClear] = "SelectionClear"
txt[SelectionRequest] = "SelectionRequest"
txt[SelectionNotify] = "SelectionNotify"
txt[ColormapNotify] = "ColormapNotify"
txt[ClientMessage] = "ClientMessage"
txt[MappingNotify] = "MappingNotify"
txt[GenericEvent] = "GenericEvent"
txt[LASTEvent] = "LASTEvent"
if C.XInitThreads() == 0 {
panic("XKern.XInitThreads error")
}
}
// GRRTHREADS is a dirty hack to prevent threads related crashs.
//
func GRRTHREADS() {
C.XInitThreads()
}
// !!! make sure XInitThreads is called before gtk_init.
// http://stackoverflow.com/questions/18647475/threading-problems-with-gtk.
func init() {
C.XInitThreads()
}