Python urwid.emit_signal() Examples

def _execute_on_selected(self, p_cmd_str, p_execute_signal):
        """
        Executes command specified by p_cmd_str on selected todo item.

        p_cmd_str should be a string with one replacement field ('{}') which
        will be substituted by id of the selected todo item.

        p_execute_signal is the signal name passed to the main loop. It should
        be one of 'execute_command' or 'execute_command_silent'.
        """
        try:
            todo = self.listbox.focus.todo
            todo_id = str(self.view.todolist.number(todo))

            urwid.emit_signal(self, p_execute_signal, p_cmd_str, todo_id)

            # force screen redraw after editing
            if p_cmd_str.startswith('edit'):
                urwid.emit_signal(self, 'refresh')
        except AttributeError:
            # No todo item selected
            pass 

def keypress(self, size, key):
        if key == "enter":
            command = self._edit_box.edit_text

            if self._prompt_mode:
                # We're in prompt mode, return the value
                # to the queue which unblocks the prompt method.
                self._prompt_queue.put(command)
                self._prompt_mode = False
                self.clear()
            else:
                # Normal mode, call listeners.
                urwid.emit_signal(self, "line_entered", command)

            self._edit_box.edit_text = ""
        else:
            urwid.Edit.keypress(self._edit_box, size, key) 

def resolve_action(self, p_action_str, p_size=None):
        """
        Checks whether action specified in p_action_str is "built-in" or
        contains topydo command (i.e. starts with 'cmd') and forwards it to
        proper executing methods.

        p_size should be specified for some of the builtin actions like 'up' or
        'home' as they can interact with urwid.ListBox.keypress or
        urwid.ListBox.calculate_visible.
        """
        if p_action_str.startswith(('cmd ', 'cmdv ')):
            prefix, cmd = p_action_str.split(' ', 1)
            execute_signal = get_execute_signal(prefix)

            if '{}' in cmd:
                self._execute_on_selected(cmd, execute_signal)
            else:
                urwid.emit_signal(self, execute_signal, cmd)
        else:
            self.execute_builtin_action(p_action_str, p_size) 

def handle_floating_date(self, size):
        # No messages, no date
        if not self.focus:
            urwid.emit_signal(self, 'set_date', None)
            return
        middle, top, _ = self.calculate_visible(size, self.focus)
        row_offset, widget, focus_position, _, _ = middle
        index = focus_position - row_offset + top[0]
        all_before = self.body[:index]
        all_before.reverse()
        text_divider = None
        for row in all_before:
            if isinstance(row, TextDivider):
                text_divider = row
                break
        urwid.emit_signal(self, 'set_date', text_divider) 

def keypress(self, size, key):
        reserved_keys = ('up', 'down', 'page up', 'page down')
        if key in reserved_keys:
            return super(SetSnoozeWidget, self).keypress(size, key)
        elif key == 'enter':
            focus = self.snooze_time_list.body.get_focus()
            if focus[0]:
                urwid.emit_signal(self, 'set_snooze_time', focus[0].id)
                urwid.emit_signal(self, 'close_set_snooze')
                return True
        elif key == 'esc':
            focus = self.snooze_time_list.body.get_focus()
            if focus[0]:
                urwid.emit_signal(self, 'close_set_snooze')
                return True

        self.header.keypress((size[0],), key) 

def set_insert_mode(self):
        urwid.emit_signal(self, 'set_insert_mode') 

def mouse_event(self, size, event, button, col, row, focus):
        if event == 'mouse press':
            now = time.time()
            if self.last_time_clicked and (now - self.last_time_clicked < 0.5):
                urwid.emit_signal(self, 'go_to_channel', self.id)
            self.last_time_clicked = now 

def mark_as_read(self, data):
        urwid.emit_signal(self, 'mark_read', data) 

def auto_scroll(self, switch):
        if type(switch) != bool:
            return

        self._auto_scroll = switch
        urwid.emit_signal(self, 'set_auto_scroll', switch) 

def mark_read_emit(self, loop, data):
        urwid.emit_signal(self, 'mark_read', data) 

def keypress(self, size, key):
        keymap = Store.instance.config['keymap']
        self.handle_floating_date(size)

        if key in (keymap['cursor_up'], keymap['cursor_down'], 'up', 'down', ):
            now = time.time()
            max_focus = self.get_focus()[1]

            if now - self.last_keypress[0] < MARK_READ_ALARM_PERIOD and self.last_keypress[1] is not None:
                if max_focus < self.last_keypress[2]:
                    max_focus = self.last_keypress[2]

                self.event_loop.remove_alarm(self.last_keypress[1])

            self.last_keypress = (
                now,
                self.event_loop.set_alarm_in(MARK_READ_ALARM_PERIOD, self.mark_read_emit, max_focus),
                max_focus
            )

        # Go to insert mode
        if key == 'down' and self.get_focus()[1] == len(self.body) - 1:
            urwid.emit_signal(self, 'set_insert_mode')
            return True

        super(ChatBoxMessages, self).keypress(size, key)

        if key in ('page up', 'page down'):
            self.auto_scroll = self.get_focus()[1] == len(self.body) - 1

        if key == keymap['cursor_up']:
            self.keypress(size, 'up')
        if key == keymap['cursor_down']:
            self.keypress(size, 'down') 

def keypress(self, size, key):
        if key == 'enter':
            urwid.emit_signal(self, 'submit_message', self.get_edit_text())
            return True
        elif key == 'up':
            urwid.emit_signal(self, 'go_to_last_message')
            return True
        return super(MessagePrompt, self).keypress(size, key) 

def mouse_event(self, size, event, button, col, row, focus):
        if event == 'mouse press':
            now = time.time()
            if self.last_time_clicked and (now - self.last_time_clicked < 0.5):
                urwid.emit_signal(self, 'select_workspace', self.number)
            self.last_time_clicked = now 

def switch_workspace(self, number):
        if number - 1 != self.selected:
            self.select(number)
            urwid.emit_signal(self, 'switch_workspace', number) 

def keypress(self, size, key):
        if key == 'esc':
            urwid.emit_signal(self, 'exit_command')

        if key == 'tab':
            autoComplete(self)

        if key == 'enter':
            command = self.edit_text.strip()
            if command:
                self.edit_text = u''
                self.historyList.append(command)
                urwid.emit_signal(self, 'command_entered', command)
            self.historyIndex = len(self.historyList)
            self.edit_text = u''

        if key == 'up':
            self.historyIndex -= 1

            if self.historyIndex < 0:
                self.historyIndex = 0
            else:
                self.edit_text = self.historyList[self.historyIndex]

        if key == 'down':
            self.historyIndex += 1

            if self.historyIndex >= len(self.historyList):
                self.historyIndex = len(self.historyList)
                self.edit_text = u''
            else:
                self.edit_text = self.historyList[self.historyIndex]
        else:
            urwid.Edit.keypress(self, size, key) 

def start_station(self):
        """
        Start playing the selected station
        """
        urwid.emit_signal(self, 'activate', self) 

def item_activated(self, mystationlistitem):
        """
        Called when a specific station  is selected.
        Re-emits this event.
        """
        urwid.emit_signal(self, 'activate', mystationlistitem) 

def start_playlist(self):
        """
        Start playing the selected playlist
        """
        urwid.emit_signal(self, 'activate', self) 

def item_activated(self, myplaylistlistitem):
        """
        Called when a specific playlist is selected.
        Re-emits this event.
        """
        urwid.emit_signal(self, 'activate', myplaylistlistitem) 

def send_query(self):
        """
        Send a message to urwid to search the filled in search query
        """
        urwid.emit_signal(self, 'search-requested', self.query.edit_text) 

def _send_signal(self, signal):
        urwid.emit_signal(self, signal, self) 

def close(self, *_):
        """
        Close this menu.
        """
        urwid.emit_signal(self, 'close') 

def completion_mode(self, p_enable):
        if p_enable is True:
            urwid.emit_signal(self, 'show_completions')
        elif p_enable is False:
            self._surrounding_text = None
            if self.completion_mode:
                self.completion_box.clear()
                urwid.emit_signal(self, 'hide_completions') 

def __init__(self, p_todolist):
        self._todolist = p_todolist

        self.titleedit = urwid.Edit("Title: ", "")
        self.sortedit = urwid.Edit("Sort expression: ", "")
        self.groupedit = urwid.Edit("Group expression: ", "")
        self.filteredit = urwid.Edit("Filter expression: ", "")

        radiogroup = []
        self.relevantradio = urwid.RadioButton(radiogroup, "Only show relevant todo items", True)
        self.allradio = urwid.RadioButton(radiogroup, "Show all todo items")

        self.pile = urwid.Pile([
            self.filteredit,
            self.titleedit,
            self.sortedit,
            self.groupedit,
            self.relevantradio,
            self.allradio,
            urwid.Button("Save", lambda _: urwid.emit_signal(self, 'save')),
            urwid.Button("Cancel", lambda _: self.close()),
        ])

        self.reset()

        super().__init__(self.pile)

        urwid.register_signal(ViewWidget, ['save', 'close']) 

def close(self):
        urwid.emit_signal(self, 'close') 

def keystate(self, p_keystate):
        self._keystate = p_keystate
        keystate_to_show = p_keystate if p_keystate else ''
        urwid.emit_signal(self, 'show_keystate', keystate_to_show) 

def _mark_all(self):
        for todo in self.listbox.body:
            if isinstance(todo, TodoWidget):
                todo_id = str(self.view.todolist.number(todo.todo))
                urwid.emit_signal(self, 'toggle_mark', todo_id, 'mark')
                todo.mark() 

def _add_pending_action(self, p_action, p_size):
        """
        Creates action waiting for execution and forwards it to the mainloop.
        """
        def generate_callback():
            def callback(*args):
                self.resolve_action(p_action, p_size)
                self.keystate = None

            return callback

        urwid.emit_signal(self, 'add_pending_action', generate_callback()) 

def _blur(self):
        self.clear()
        urwid.emit_signal(self, 'blur') 

def _emit_command(self):
        if len(self.edit_text) > 0:
            urwid.emit_signal(self, 'execute_command', self.edit_text)
            self._save_to_history()
            self.clear()