first working prototype

lightdm-mobile-greeter

@@ -0,0 +1,128 @@
+#!/usr/bin/python3
+import gi
+
+gi.require_version("Gtk", "3.0")
+gi.require_version("Handy", "0.0")
+#gi.require_version("LightDM", 0.0)
+from gi.repository import Gtk, Handy, LightDM, Gdk
+
+# main window
+window = Gtk.Window()
+window.connect("destroy", Gtk.main_quit)
+display = Gdk.Display.get_default()
+monitor = display.get_monitor(0)
+screen_size = monitor.get_geometry()
+window.set_size_request(screen_size.width, screen_size.height)
+# window.set_resizable(False)
+
+# scrollable view
+scroll = Gtk.ScrolledWindow(visible=True)
+window.add(scroll)
+viewport = Gtk.Viewport(visible=True)
+scroll.add(viewport)
+print("2", file=sys.stderr)
+# collomn box
+container = Gtk.Box(
+    visible=True,
+    can_focus=False,
+    orientation="vertical",
+    halign="center",
+    valign="center",
+    hexpand=True,
+    vexpand=True,
+    spacing=12
+)
+container.set_size_request(screen_size.width * 0.9, screen_size.height * 0.9)
+viewport.add(container)
+
+# entry buffer
+entry_buffer = Gtk.EntryBuffer()
+
+
+# backspace
+def backspace(btn):
+    length = entry_buffer.get_length()
+    if length <= 0:
+        # theres no text left to delete
+        return
+    text = entry_buffer.get_text()
+    print(text)
+    entry_buffer.delete_text(length - 1, 1)
+    text2 = entry_buffer.get_text()
+    print(text2)
+
+
+delete_btn = Gtk.Button(visible=True, can_focus=True, focus_on_click=False)
+db_img = Gtk.Image(visible=True, icon_name="edit-clear-symbolic")
+delete_btn.add(db_img)
+delete_btn.connect("clicked", backspace)
+
+# entry
+pin_entry = Gtk.Entry(
+    visible=True,
+    can_focus=False,
+    has_frame=False,
+    margin_top=12,
+    margin_bottom=12,
+    visibility=False,
+    buffer=entry_buffer,
+    input_purpose=Gtk.InputPurpose.PIN,
+    xalign=0.5,
+    caps_lock_warning=False,
+    hexpand=True,
+    vexpand=True,
+)
+container.add(pin_entry)
+
+# keypad
+keypad = Handy.Keypad(
+    visible=True,
+    can_focus=False,
+    halign="fill",
+    valign="fill",
+    margin_top=12,
+    margin_bottom=12,
+    only_digits=True,
+    show_symbols=False,
+    right_action=delete_btn,
+    entry=pin_entry,
+)
+container.add(keypad)
+
+# greeter
+greeter = LightDM.Greeter()
+
+print("4", file=sys.stderr)
+def login_clicked(btn):
+#    greeter.authenticate("demo")
+    greeter.respond(pin_entry.get_text())
+    if greeter.get_is_authenticated():
+        greeter.start_session_sync(None)
+
+
+# login button
+login_btn = Gtk.Button(label="Login", visible=True)
+login_btn.connect("clicked", login_clicked)
+container.add(login_btn)
+
+# prompt label
+prompt_label = Gtk.Label(visible=True)
+container.add(prompt_label)
+
+# message label
+message_label = Gtk.Label(visible=True)
+container.add(message_label)
+
+
+greeter.connect(
+    "authentication-complete",
+    lambda g: g.get_is_authenticated() and g.start_session_sync(None),
+)
+greeter.connect("show-message", lambda g, m, pt: message_label.set_text(m))
+greeter.connect("show-prompt", lambda g, m, t: prompt_label.set_text(m))
+greeter.connect_sync()
+greeter.authenticate("demo")
+
+window.show()
+window.fullscreen()
+Gtk.main()

lightdm-phosh-greeter.desktop

@@ -0,0 +1,5 @@
+[Desktop Entry]
+Name=Mobile Greeter
+Comment=A simple lightdm greeter for mobile
+Exec=lightdm-mobile-greeter
+Type=Application