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341 lines
10 KiB
Python
341 lines
10 KiB
Python
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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# key-mapper - GUI for device specific keyboard mappings
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# Copyright (C) 2020 sezanzeb <proxima@hip70890b.de>
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#
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# This file is part of key-mapper.
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#
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# key-mapper is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# key-mapper 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 License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with key-mapper. If not, see <https://www.gnu.org/licenses/>.
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"""A single, configurable key mapping."""
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import evdev
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from gi.repository import Gtk, GLib, Gdk
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from keymapper.state import custom_mapping, system_mapping
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from keymapper.logger import logger
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from keymapper.key import Key
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CTX_KEYCODE = 2
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store = Gtk.ListStore(str)
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for name in system_mapping.list_names():
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store.append([name])
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def to_string(key):
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"""A nice to show description of the pressed key."""
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if isinstance(key, Key):
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return ' + '.join([to_string(sub_key) for sub_key in key])
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if isinstance(key[0], tuple):
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raise Exception('deprecated stuff')
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ev_type, code, value = key
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if ev_type not in evdev.ecodes.bytype:
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logger.error('Unknown key type for %s', key)
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return 'unknown'
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if code not in evdev.ecodes.bytype[ev_type]:
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logger.error('Unknown key code for %s', key)
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return 'unknown'
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key_name = evdev.ecodes.bytype[ev_type][code]
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if isinstance(key_name, list):
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key_name = key_name[0]
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if ev_type != evdev.ecodes.EV_KEY:
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direction = {
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(evdev.ecodes.ABS_HAT0X, -1): 'L',
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(evdev.ecodes.ABS_HAT0X, 1): 'R',
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(evdev.ecodes.ABS_HAT0Y, -1): 'U',
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(evdev.ecodes.ABS_HAT0Y, 1): 'D',
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(evdev.ecodes.ABS_HAT1X, -1): 'L',
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(evdev.ecodes.ABS_HAT1X, 1): 'R',
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(evdev.ecodes.ABS_HAT1Y, -1): 'U',
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(evdev.ecodes.ABS_HAT1Y, 1): 'D',
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(evdev.ecodes.ABS_HAT2X, -1): 'L',
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(evdev.ecodes.ABS_HAT2X, 1): 'R',
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(evdev.ecodes.ABS_HAT2Y, -1): 'U',
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(evdev.ecodes.ABS_HAT2Y, 1): 'D',
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}.get((code, value))
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if direction is not None:
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key_name += f' {direction}'
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return key_name.replace('KEY_', '')
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IDLE = 0
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HOLDING = 1
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class Row(Gtk.ListBoxRow):
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"""A single, configurable key mapping."""
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__gtype_name__ = 'ListBoxRow'
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def __init__(self, delete_callback, window, key=None, character=None):
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"""Construct a row widget.
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Parameters
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----------
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key : Key
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"""
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if key is not None and not isinstance(key, Key):
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raise TypeError('Expected key to be a Key object')
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super().__init__()
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self.device = window.selected_device
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self.window = window
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self.delete_callback = delete_callback
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self.character_input = None
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self.keycode_input = None
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self.key = key
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self.put_together(character)
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self.state = IDLE
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def release(self):
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"""Tell the row that no keys are currently pressed down."""
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if self.state == HOLDING:
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# A key was pressed and then released.
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# Switch to the character. idle_add this so that the
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# keycode event won't write into the character input as well.
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window = self.window.window
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GLib.idle_add(lambda: window.set_focus(self.character_input))
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def get_key(self):
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"""Get the Key object from the left column.
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Or None if no code is mapped on this row.
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"""
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return self.key
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def get_character(self):
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"""Get the assigned character from the middle column."""
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character = self.character_input.get_text()
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return character if character else None
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def set_new_key(self, new_key):
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"""Check if a keycode has been pressed and if so, display it.
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Parameters
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----------
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new_key : Key
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"""
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if new_key is not None and not isinstance(new_key, Key):
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raise TypeError('Expected new_key to be a Key object')
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# the newest_keycode is populated since the ui regularly polls it
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# in order to display it in the status bar.
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previous_key = self.get_key()
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# no input
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if new_key is None:
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return
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# it might end up being a key combination
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self.state = HOLDING
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# keycode didn't change, do nothing
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if new_key == previous_key:
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return
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# keycode is already set by some other row
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existing = custom_mapping.get_character(new_key)
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if existing is not None:
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msg = f'"{to_string(new_key)}" already mapped to "{existing}"'
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logger.info(msg)
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self.window.show_status(CTX_KEYCODE, msg)
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return
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# it's legal to display the keycode
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# always ask for get_child to set the label, otherwise line breaking
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# has to be configured again.
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self.set_keycode_input_label(to_string(new_key))
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self.key = new_key
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self.highlight()
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character = self.get_character()
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# the character is empty and therefore the mapping is not complete
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if character is None:
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return
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# else, the keycode has changed, the character is set, all good
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custom_mapping.change(
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new_key=new_key,
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character=character,
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previous_key=previous_key
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)
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def highlight(self):
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"""Mark this row as changed."""
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self.get_style_context().add_class('changed')
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def unhighlight(self):
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"""Mark this row as unchanged."""
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self.get_style_context().remove_class('changed')
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def on_character_input_change(self, _):
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"""When the output character for that keycode is typed in."""
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key = self.get_key()
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character = self.get_character()
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if character is None:
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return
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self.highlight()
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if key is not None:
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custom_mapping.change(
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new_key=key,
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character=character,
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previous_key=None
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)
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def match(self, _, key, tree_iter):
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"""Search the avilable names."""
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value = store.get_value(tree_iter, 0)
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return key in value.lower()
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def show_click_here(self):
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"""Show 'click here' on the keycode input button."""
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if self.get_key() is not None:
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return
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self.set_keycode_input_label('click here')
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self.keycode_input.set_opacity(0.3)
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def show_press_key(self):
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"""Show 'press key' on the keycode input button."""
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if self.get_key() is not None:
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return
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self.set_keycode_input_label('press key')
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self.keycode_input.set_opacity(1)
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def on_keycode_input_focus(self, *_):
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"""Refresh useful usage information."""
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self.show_press_key()
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self.window.can_modify_mapping()
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def on_keycode_input_unfocus(self, *_):
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"""Refresh useful usage information and set some state stuff."""
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self.show_click_here()
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self.keycode_input.set_active(False)
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self.state = IDLE
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def set_keycode_input_label(self, label):
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"""Set the label of the keycode input."""
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self.keycode_input.set_label(label)
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# make the child label widget break lines, important for
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# long combinations
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label = self.keycode_input.get_child()
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label.set_line_wrap(True)
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label.set_line_wrap_mode(2)
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label.set_max_width_chars(13)
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label.set_justify(Gtk.Justification.CENTER)
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def put_together(self, character):
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"""Create all child GTK widgets and connect their signals."""
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delete_button = Gtk.EventBox()
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delete_button.add(Gtk.Image.new_from_icon_name(
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'window-close',
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Gtk.IconSize.BUTTON
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))
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delete_button.connect(
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'button-press-event',
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self.on_delete_button_clicked
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)
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delete_button.set_size_request(50, -1)
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keycode_input = Gtk.ToggleButton()
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self.keycode_input = keycode_input
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keycode_input.set_size_request(140, -1)
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if self.key is not None:
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self.set_keycode_input_label(to_string(self.key))
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else:
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self.show_click_here()
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# make the togglebutton go back to its normal state when doing
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# something else in the UI
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keycode_input.connect(
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'focus-in-event',
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self.on_keycode_input_focus
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)
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keycode_input.connect(
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'focus-out-event',
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self.on_keycode_input_unfocus
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)
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# don't leave the input when using arrow keys or tab. wait for the
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# window to consume the keycode from the reader
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keycode_input.connect(
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'key-press-event',
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lambda *args: Gdk.EVENT_STOP
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)
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character_input = Gtk.Entry()
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self.character_input = character_input
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character_input.set_alignment(0.5)
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character_input.set_width_chars(4)
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character_input.set_has_frame(False)
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completion = Gtk.EntryCompletion()
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completion.set_model(store)
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completion.set_text_column(0)
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completion.set_match_func(self.match)
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character_input.set_completion(completion)
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if character is not None:
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character_input.set_text(character)
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character_input.connect(
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'changed',
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self.on_character_input_change
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)
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box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
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box.set_homogeneous(False)
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box.set_spacing(0)
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box.pack_start(keycode_input, expand=False, fill=True, padding=0)
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box.pack_start(character_input, expand=True, fill=True, padding=0)
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box.pack_start(delete_button, expand=False, fill=True, padding=0)
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box.show_all()
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box.get_style_context().add_class('row-box')
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self.add(box)
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self.show_all()
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def on_delete_button_clicked(self, *_):
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"""Destroy the row and remove it from the config."""
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key = self.get_key()
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if key is not None:
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custom_mapping.clear(key)
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self.character_input.set_text('')
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self.set_keycode_input_label('')
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self.key = None
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self.delete_callback(self)
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