Python script, ASCII text executable
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"""
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Kineboard: an experimental touchscreen keyboard using swipes to allow
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having fewer touch targets.
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Copyright 2025-2026, roundabout-host.com <vlad@roundabout-host.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public Licence as published by
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the Free Software Foundation, either version 3 of the Licence, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public Licence for more details.
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You should have received a copy of the GNU General Public Licence
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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import itertools
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import sys
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import os
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import time
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import ruamel.yaml as yaml
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from pathlib import Path
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os.environ["GI_TYPELIB_PATH"] = "/usr/local/lib/x86_64-linux-gnu/girepository-1.0"
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from ctypes import CDLL
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CDLL("libgtk4-layer-shell.so")
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import gi
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gi.require_version("Gtk", "4.0")
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gi.require_version("Gtk4LayerShell", "1.0")
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from gi.repository import (
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Gtk, Gdk, GObject, Gtk4LayerShell, GLib, Gio, GObject
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)
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try:
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gi.require_version("Lfb", "0.0")
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from gi.repository import Lfb
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except ImportError:
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Lfb = None
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from pywayland.client import Display, EventQueue
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from pywayland.protocol.wayland import WlRegistry, WlSeat
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from pywayland.protocol.input_method_unstable_v1 import (
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ZwpInputMethodContextV1,
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ZwpInputMethodV1
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)
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from pywayland.protocol.input_method_unstable_v2 import (
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ZwpInputMethodV2,
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ZwpInputMethodManagerV2
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)
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from pywayland.protocol.virtual_keyboard_unstable_v1 import ZwpVirtualKeyboardManagerV1
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from xkbcommon import xkb
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import ctypes
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from cffi import FFI
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ffi = FFI()
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ffi.cdef("""
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void * gdk_wayland_display_get_wl_display (void * display);
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void * gdk_wayland_surface_get_wl_surface (void * surface);
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void * gdk_wayland_monitor_get_wl_output (void * monitor);
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""")
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gtk = ffi.dlopen("libgtk-4.so.1")
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module_directory = Path(__file__).resolve().parent
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custom_css = """
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.kineboard-selected-character {
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text-decoration: underline;
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}
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"""
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css_provider = Gtk.CssProvider()
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css_provider.load_from_data(custom_css)
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Gtk.StyleContext.add_provider_for_display(
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Gdk.Display.get_default(),
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css_provider,
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100
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)
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def get_layout_directories():
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data_home = Path(os.getenv("XDG_DATA_HOME", Path.home() / ".local" / "share"))
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data_dirs = [Path(d) for d in os.getenv("XDG_DATA_DIRS", "/usr/local/share:/usr/share").split(":")]
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all_paths = [data_home / "kineboard" / "layouts"] + [d / "kineboard" / "layouts" for d in data_dirs]
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return [d for d in all_paths if d.is_dir()]
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class GestureZone(GObject.GEnum):
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NONE = 0
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CENTRAL = 1
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TOP_LEFT = 2
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TOP_RIGHT = 3
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BOTTOM_RIGHT = 4
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BOTTOM_LEFT = 5
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class SwipeButton(Gtk.Frame):
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@GObject.Signal
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def top_left(self):
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pass
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@GObject.Signal
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def top_right(self):
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pass
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@GObject.Signal
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def bottom_left(self):
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pass
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@GObject.Signal
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def bottom_right(self):
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pass
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@GObject.Signal
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def central(self):
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pass
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@GObject.Signal(arg_types=(int,))
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def drag_changed(self, zone):
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pass
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def __init__(self, **kwargs):
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Gtk.Frame.__init__(self, **kwargs)
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self.zone = GestureZone.NONE
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self.gesture_drag = Gtk.GestureDrag()
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self.gesture_drag.connect("drag-end", self.finish_drag)
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self.gesture_drag.connect("drag-update", self.move_drag)
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self.gesture_drag.connect("drag-begin", self.begin_drag)
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self.add_controller(self.gesture_drag)
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def finish_drag(self, gesture, offset_x, offset_y):
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if abs(offset_x) / self.get_width() + abs(offset_y) / self.get_height() > 1 / 2:
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if offset_x > 0 and offset_y > 0:
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self.emit("bottom_right")
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elif offset_x <= 0 and offset_y > 0:
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self.emit("bottom_left")
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elif offset_x > 0 and offset_y <= 0:
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self.emit("top_right")
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elif offset_x <= 0 and offset_y <= 0:
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self.emit("top_left")
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else:
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self.emit("central")
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def move_drag(self, gesture, offset_x, offset_y):
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new_zone = self.zone
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if abs(offset_x) / self.get_width() + abs(offset_y) / self.get_height() > 1 / 2:
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if offset_x > 0 and offset_y > 0:
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new_zone = GestureZone.BOTTOM_RIGHT
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elif offset_x <= 0 and offset_y > 0:
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new_zone = GestureZone.BOTTOM_LEFT
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elif offset_x > 0 and offset_y <= 0:
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new_zone = GestureZone.TOP_RIGHT
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elif offset_x <= 0 and offset_y <= 0:
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new_zone = GestureZone.TOP_LEFT
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else:
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new_zone = GestureZone.CENTRAL
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if new_zone != self.zone:
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self.zone = new_zone
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self.emit("drag_changed", self.zone)
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def begin_drag(self, gesture, start_x, start_y):
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self.emit("drag_changed", GestureZone.CENTRAL)
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class SwipeTyper(SwipeButton):
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@GObject.Signal(arg_types=(str,))
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def typed(self, character):
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if self.release_feedback:
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self.release_feedback.trigger_feedback()
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# Since the drag is finished, remove the underlines
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for label in self.label_map.values():
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label.remove_css_class("kineboard-selected-character")
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def underline(self, zone):
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if self.depress_feedback:
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self.depress_feedback.trigger_feedback()
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for label in self.label_map.values():
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label.remove_css_class("kineboard-selected-character")
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self.label_map[zone].add_css_class("kineboard-selected-character")
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def __init__(self, tl, tr, bl, br, c, depress_feedback, release_feedback, **kwargs):
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SwipeButton.__init__(self, **kwargs)
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self.depress_feedback = depress_feedback
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self.release_feedback = release_feedback
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self.tl = tl
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self.tr = tr
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self.bl = bl
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self.br = br
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self.c = c
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self.grid = Gtk.Grid(hexpand=True, vexpand=True, row_homogeneous=True, column_homogeneous=True, margin_top=4, margin_bottom=4, margin_start=4, margin_end=4)
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self.set_child(self.grid)
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self.tl_label = Gtk.Label(label=tl)
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self.grid.attach(self.tl_label, 0, 0, 1, 1)
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self.tr_label = Gtk.Label(label=tr)
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self.grid.attach(self.tr_label, 2, 0, 1, 1)
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self.bl_label = Gtk.Label(label=bl)
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self.grid.attach(self.bl_label, 0, 2, 1, 1)
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self.br_label = Gtk.Label(label=br)
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self.grid.attach(self.br_label, 2, 2, 1, 1)
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self.c_label = Gtk.Label(label=c)
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self.grid.attach(self.c_label, 1, 1, 1, 1)
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self.label_map = {
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GestureZone.CENTRAL: self.c_label,
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GestureZone.TOP_LEFT: self.tl_label,
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GestureZone.TOP_RIGHT: self.tr_label,
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GestureZone.BOTTOM_RIGHT: self.br_label,
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GestureZone.BOTTOM_LEFT: self.bl_label
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}
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self.connect("top_left", lambda p: self.emit("typed", tl))
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self.connect("top_right", lambda p: self.emit("typed", tr))
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self.connect("bottom_left", lambda p: self.emit("typed", bl))
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self.connect("bottom_right", lambda p: self.emit("typed", br))
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self.connect("central", lambda p: self.emit("typed", c))
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self.connect("drag_changed", lambda p, zone: self.underline(zone))
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class Plane(Gtk.Grid):
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def __init__(self, app, data, depress_feedback, release_feedback, **kwargs):
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Gtk.Grid.__init__(self, **kwargs)
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self.app = app
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self.depress_feedback = depress_feedback
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self.release_feedback = release_feedback
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self.all_characters = ""
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for j, column in enumerate(data):
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for k, key in enumerate(column):
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widget = SwipeTyper(key["top_left"], key["top_right"], key["bottom_left"],
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key["bottom_right"], key["central"], self.depress_feedback, self.release_feedback)
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widget.connect("typed", self.app.typed)
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self.attach(widget, k, j, 1, 1)
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self.all_characters += key["top_left"] + key["top_right"] + key["bottom_left"] + key["bottom_right"] + key["central"]
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def make_xkb_keymap_from_unicodes(unicodes):
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symbols = [
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"key <LEFT> { [ Left ] };"
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"key <RGHT> { [ Right ] };"
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"key <UP> { [ Up ] };"
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"key <DOWN> { [ Down ] };"
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"key <TAB> { [ Tab ] };",
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"key <LCTL> { [ Control_L ] };",
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"key <LALT> { [ Alt_L ] };",
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"key <LSHF> { [ Shift_L ] };",
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"key <LSPR> { [ Super_L ] };",
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"key <ESCP> { [ Escape ] };",
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"key <BKSP> { [ BackSpace ] };",
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"key <RTRN> { [ Return ] };",
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]
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keycodes = [
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"<LEFT> = 4084;",
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"<RGHT> = 4085;",
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"<UP> = 4086;",
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"<DOWN> = 4087;",
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"<TAB> = 4088;",
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"<LCTL> = 4089;",
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"<LALT> = 4090;",
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"<LSHF> = 4091;",
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"<LSPR> = 4092;",
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"<ESCP> = 4093;",
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"<BKSP> = 4094;",
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"<RTRN> = 4095;",
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]
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for i, char in enumerate(unicodes):
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keycode = 0x1000 + i
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keysym = f"U{ord(char):04X}"
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symbols.append(f"key <K{i:03X}> {{ [ {keysym} ] }};")
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keycodes.append(f"<K{i:03X}> = {keycode};")
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return ("xkb_keymap { xkb_keycodes \"kineboard\" { minimum = 8; maximum = 65535; "
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+ " ".join(keycodes) + " }; xkb_symbols \"kineboard\" { " + " ".join(symbols)
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+ " }; xkb_types \"kineboard\" { type \"ONE_LEVEL\" { modifiers = none; level_name[Level1] = \"Any\"; }; }; xkb_compatibility \"kineboard\" {}; };")
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from gi.repository import Gio, GLib
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def register_client(client_id: str):
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bus = Gio.bus_get_sync(Gio.BusType.SESSION, None)
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proxy = Gio.DBusProxy.new_sync(
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bus,
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Gio.DBusProxyFlags.DO_NOT_LOAD_PROPERTIES |
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Gio.DBusProxyFlags.DO_NOT_AUTO_START_AT_CONSTRUCTION,
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None,
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"org.gnome.SessionManager",
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"/org/gnome/SessionManager",
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"org.gnome.SessionManager",
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None
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)
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startup_id = GLib.getenv("DESKTOP_AUTOSTART_ID") or ""
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def on_registered(proxy, result, loop):
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try:
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proxy.call_finish(result)
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except Exception as e:
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print("cannot register client:", e)
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loop.quit()
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loop = GLib.MainLoop()
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proxy.call(
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"RegisterClient",
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GLib.Variant("(ss)", (client_id, startup_id)),
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Gio.DBusCallFlags.NONE,
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-1,
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None,
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lambda p, r, l: on_registered(p, r, loop),
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loop
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)
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loop.run()
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return proxy
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class ModifierButton(Gtk.ToggleButton):
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def __init__(self, app, mask, **kwargs):
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super().__init__(**kwargs)
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self.app = app
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self.mask = mask
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self.connect("toggled", self.toggle_modifier)
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def toggle_modifier(self, button):
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if button.get_active():
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self.app.depressed_modifiers |= self.mask
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else:
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self.app.depressed_modifiers &= ~self.mask
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self.app.send_modifiers()
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class Kineboard(Gtk.Application):
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def __init__(self):
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Gtk.Application.__init__(
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self,
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application_id="sm.puri.OSK0",
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flags=Gio.ApplicationFlags.HANDLES_COMMAND_LINE
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)
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self.depress_feedback = None
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self.release_feedback = None
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self.xkb_context = xkb.Context()
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self.revealer = None
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self.switcher = None
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self.depressed_modifiers = 0
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self.character_index = {}
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self.keymap_fd = None
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self.vk = None
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self.keymap_text = ""
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self.all_characters = ""
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self.context = None
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self.input_method_manager = None
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self.input_method = None
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self.registry = None
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self.box = None
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self.window = None
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self.stack = None
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self.display = None
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self.wl_display = None
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self.seat = None
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self.vkm = None
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self.serial = 0
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self.extra_revealer = None
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self.extra_viewport = None
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self.extra_scroll = None
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self.extra_controls = None
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self.add_main_option(
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"invoke",
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ord("i"),
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GLib.OptionFlags.NONE,
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GLib.OptionArg.NONE,
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"Manually bring up the keyboard",
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None
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)
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self.add_main_option(
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"hide",
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ord("h"),
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GLib.OptionFlags.NONE,
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GLib.OptionArg.NONE,
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"Hide the keyboard",
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None
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)
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def send_modifiers(self):
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self.vk.modifiers(self.depressed_modifiers, 0, 0, 0)
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def do_startup(self):
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Gtk.Application.do_startup(self)
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register_client("sm.puri.OSK0")
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self.depress_feedback = None
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self.release_feedback = None
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if Lfb:
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Lfb.init("sm.puri.OSK0")
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self.depress_feedback = Lfb.Event.new("button-pressed")
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self.release_feedback = Lfb.Event.new("button-released")
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self.display = Gdk.Display.get_default()
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self.window = Gtk.Window(application=self, title="Demo", focus_on_click=False, focusable=False, can_focus=False)
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Gtk4LayerShell.init_for_window(self.window)
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Gtk4LayerShell.set_keyboard_mode(self.window, Gtk4LayerShell.KeyboardMode.NONE)
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self.window.set_default_size(16384, -1) # large width so that it spans the bottom
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Gtk4LayerShell.set_anchor(self.window, Gtk4LayerShell.Edge.BOTTOM, True)
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Gtk4LayerShell.set_anchor(self.window, Gtk4LayerShell.Edge.LEFT, True)
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Gtk4LayerShell.set_anchor(self.window, Gtk4LayerShell.Edge.RIGHT, True)
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Gtk4LayerShell.auto_exclusive_zone_enable(self.window)
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Gtk4LayerShell.set_namespace(self.window, "osk")
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self.box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
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self.main_box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, margin_top=8)
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self.window.set_child(self.main_box)
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self.stack = Gtk.Stack()
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self.box.append(self.stack)
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layouts = itertools.chain.from_iterable((f for f in path.iterdir() if f.is_file()) for path in get_layout_directories())
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self.all_characters = " "
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self.switcher = Gtk.StackSidebar(stack=self.stack)
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self.revealer = Gtk.Revealer(child=self.switcher, transition_type=Gtk.RevealerTransitionType.SLIDE_RIGHT)
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self.box.prepend(self.revealer)
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self.extra_controls = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=8,
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margin_bottom=8, margin_start=8, margin_end=8)
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self.extra_viewport = Gtk.Viewport(child=self.extra_controls)
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self.extra_scroll = Gtk.ScrolledWindow(child=self.extra_viewport, propagate_natural_height=True)
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self.extra_revealer = Gtk.Revealer(child=self.extra_scroll)
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for layout in layouts:
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stack = Gtk.Stack()
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yaml_loader = yaml.YAML(typ="rt")
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data = yaml_loader.load(layout)
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controls = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=8, margin_top=0,
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margin_bottom=8, margin_start=8, margin_end=8)
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layout_button = Gtk.ToggleButton(child=Gtk.Image.new_from_icon_name("edit-symbolic"))
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layout_button.set_size_request(48, -1)
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layout_button.update_property([Gtk.AccessibleProperty.LABEL], ["Switch layout"])
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controls.append(layout_button)
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layout_button.bind_property("active", self.revealer, "reveal-child", GObject.BindingFlags.BIDIRECTIONAL)
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control_button = Gtk.ToggleButton(child=Gtk.Image.new_from_icon_name("utilities-terminal-symbolic"))
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control_button.set_size_request(48, -1)
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control_button.update_property([Gtk.AccessibleProperty.LABEL], ["Terminal controls"])
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controls.append(control_button)
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control_button.bind_property("active", self.extra_revealer, "reveal-child", GObject.BindingFlags.BIDIRECTIONAL)
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if len(data["keys"]) >= 2:
448
shift_button = Gtk.ToggleButton(
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child=Gtk.Image.new_from_icon_name("go-up-symbolic")
450
)
451
shift_button.set_size_request(48, -1)
452
shift_button.update_property([Gtk.AccessibleProperty.LABEL], ["Shift"])
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controls.append(shift_button)
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def shift(button: Gtk.ToggleButton):
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stack.set_visible_child_name(f"plane-{int(button.get_active())}")
457
shift_button.connect("toggled", shift)
459
space_bar = Gtk.Button(hexpand=True)
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space_bar.update_property([Gtk.AccessibleProperty.LABEL], ["Space"])
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space_bar.connect("clicked", lambda x: self.typed(x, " "))
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controls.append(space_bar)
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backspace_button = Gtk.Button(child=Gtk.Image.new_from_icon_name("edit-clear-symbolic"))
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backspace_button.set_size_request(48, -1)
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backspace_button.update_property([Gtk.AccessibleProperty.LABEL], ["Backspace"])
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backspace_button.connect("clicked", lambda x: self.send_keysym(0xFF6))
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controls.append(backspace_button)
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enter_button = Gtk.Button(child=Gtk.Image.new_from_icon_name("keyboard-enter-symbolic"))
472
enter_button.set_size_request(48, -1)
473
enter_button.update_property([Gtk.AccessibleProperty.LABEL], ["Enter"])
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enter_button.add_css_class("suggested-action")
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enter_button.connect("clicked", lambda x: self.send_keysym(0xFF7))
476
controls.append(enter_button)
477
for i, layer in enumerate(data["keys"]):
479
grid = Plane(self, layer, row_spacing=8, column_spacing=8, row_homogeneous=True,
480
column_homogeneous=True, margin_bottom=8,
481
margin_end=8, margin_start=8,
482
depress_feedback=self.depress_feedback,
483
release_feedback=self.release_feedback)
484
self.all_characters += grid.all_characters
485
stack.add_named(grid, f"plane-{i}")
486
outer_box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
488
outer_box.append(stack)
489
outer_box.append(controls)
490
self.stack.add_titled(outer_box, data["symbol"], data["symbol"])
491
self.main_box.append(self.extra_revealer)
493
self.main_box.append(self.box)
494
ctypes.pythonapi.PyCapsule_GetPointer.restype = ctypes.c_void_p
496
ctypes.pythonapi.PyCapsule_GetPointer.argtypes = (ctypes.py_object,)
497
self.wl_display = Display()
499
wl_display_ptr = gtk.gdk_wayland_display_get_wl_display(
500
ffi.cast("void *", ctypes.pythonapi.PyCapsule_GetPointer(self.display.__gpointer__, None)))
501
self.wl_display._ptr = wl_display_ptr
502
self.registry = self.wl_display.get_registry()
503
self.registry.dispatcher["global"] = self.on_global
504
self.registry.dispatcher["global_remove"] = self.on_global_remove
505
self.wl_display.roundtrip()
506
if self.input_method_manager:
508
self.input_method = self.input_method_manager.get_input_method(self.seat)
509
self.input_method.dispatcher["activate"] = self.activate_input
510
self.input_method.dispatcher["deactivate"] = self.deactivate_input
511
else:
512
dialog = Gtk.AlertDialog(message="Input method protocol not supported.")
513
dialog.show()
514
self.keymap_text = make_xkb_keymap_from_unicodes(self.all_characters)
516
xkb_keymap = self.xkb_context.keymap_new_from_string(self.keymap_text)
517
state = xkb_keymap.state_new()
518
519
escape_button = Gtk.Button(label="Escape")
520
escape_button.connect("clicked", lambda x: self.send_keysym(0xFF5))
521
self.extra_controls.append(escape_button)
522
self.extra_controls.append(ModifierButton(self, 1 << xkb_keymap.mod_get_index("Control"), label="Control"))
523
self.extra_controls.append(ModifierButton(self, 1 << xkb_keymap.mod_get_index("Mod1"), label="Alt"))
524
self.extra_controls.append(ModifierButton(self, 1 << xkb_keymap.mod_get_index("Shift"), label="Shift"))
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self.extra_controls.append(ModifierButton(self, 1 << xkb_keymap.mod_get_index("Mod4"), label="Super"))
526
tab_button = Gtk.Button(label="Tab")
527
tab_button.connect("clicked", lambda x: self.send_keysym(0xFF0))
528
self.extra_controls.append(tab_button)
529
left_button = Gtk.Button(child=Gtk.Image.new_from_icon_name("go-previous-symbolic"))
530
left_button.update_property([Gtk.AccessibleProperty.LABEL], ["Left"])
531
left_button.connect("clicked", lambda x: self.send_keysym(0xFEC))
532
self.extra_controls.append(left_button)
533
down_button = Gtk.Button(child=Gtk.Image.new_from_icon_name("go-down-symbolic"))
534
down_button.update_property([Gtk.AccessibleProperty.LABEL], ["Down"])
535
down_button.connect("clicked", lambda x: self.send_keysym(0xFEF))
536
self.extra_controls.append(down_button)
537
up_button = Gtk.Button(child=Gtk.Image.new_from_icon_name("go-up-symbolic"))
538
up_button.update_property([Gtk.AccessibleProperty.LABEL], ["Up"])
539
up_button.connect("clicked", lambda x: self.send_keysym(0xFEE))
540
self.extra_controls.append(up_button)
541
right_button = Gtk.Button(child=Gtk.Image.new_from_icon_name("go-next-symbolic"))
542
right_button.update_property([Gtk.AccessibleProperty.LABEL], ["Right"])
543
right_button.connect("clicked", lambda x: self.send_keysym(0xFED))
544
self.extra_controls.append(right_button)
545
546
self.character_index = {}
547
for i, character in enumerate(self.all_characters):
548
self.character_index[character] = i
549
self.vk = self.vkm.create_virtual_keyboard(self.seat)
550
self.keymap_fd = os.memfd_create("keymap")
552
os.write(self.keymap_fd, self.keymap_text.encode("utf-8"))
553
os.lseek(self.keymap_fd, 0, os.SEEK_SET)
554
self.vk.keymap(1, self.keymap_fd, len(self.keymap_text.encode("utf-8")))
555
def activate_input(self, im):
557
self.window.present()
558
def deactivate_input(self, im):
560
self.window.set_visible(False)
561
self.serial = 0
562
def on_global(self, registry, name, interface, version):
564
if interface == "zwp_input_method_manager_v2":
565
self.input_method_manager = registry.bind(name, ZwpInputMethodManagerV2, version)
566
elif interface == "wl_seat":
567
self.seat = registry.bind(name, WlSeat, version)
568
elif interface == "zwp_virtual_keyboard_manager_v1":
569
self.vkm = registry.bind(name, ZwpVirtualKeyboardManagerV1, version)
570
def on_global_remove(self, registry, name):
572
pass
573
def send_keysym(self, key):
575
clock = int(time.monotonic() * 1000)
576
if self.vk:
577
self.vk.key(clock, key, 1)
578
self.vk.key(clock, key, 0)
579
def typed(self, button, characters):
581
for char in characters:
582
self.send_keysym(0xFF8 + self.character_index[char])
583
def do_activate(self):
585
Gtk.Application.do_activate(self)
586
# self.window.present()
587
def do_command_line(self, command_line: Gio.ApplicationCommandLine):
589
options = command_line.get_options_dict()
590
args = command_line.get_arguments()[1:]
591
if options.contains("invoke"):
592
self.activate_input(None, None)
593
elif options.contains("hide"):
594
self.deactivate_input(None, None)
595
return 0
596
if __name__ == "__main__":
599
kineboard = Kineboard()
600
kineboard.run(sys.argv)
601