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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
""" parlatype-example.py demonstrates libparlatype. """
import os
import sys
import gi
gi.require_version('Parlatype', '4.0')
gi.require_version('Gtk', '3.0')
from gi.repository import Parlatype as Pt
from gi.repository import Gtk
from gi.repository import GObject
def error_message(message, parent):
msg = Gtk.MessageDialog(parent=parent,
modal=True,
message_type=Gtk.MessageType.ERROR,
buttons=Gtk.ButtonsType.OK,
text=message)
msg.run()
msg.destroy()
class ParlatypeExample:
def __init__(self):
self.player = Pt.Player.new()
self.player.connect("error", self.player_error)
self.player.connect("end-of-stream", self.player_end_of_stream)
builder = Gtk.Builder()
builder.add_from_file('parlatype-example.ui')
builder.connect_signals(self)
self.win = builder.get_object('window')
self.win.connect("delete-event", Gtk.main_quit)
self.viewer = builder.get_object('waveviewer')
self.player.connect_waveviewer(self.viewer)
self.progress = builder.get_object('progress')
self.viewer.connect('load-progress', self.update_progress)
self.button = builder.get_object('button_play')
self.label = builder.get_object('pos_label')
follow_cursor = builder.get_object('follow_cursor')
GObject.GObject.bind_property(follow_cursor, "active",
self.viewer, "follow-cursor",
GObject.BindingFlags.BIDIRECTIONAL |
GObject.BindingFlags.SYNC_CREATE)
volumebutton = builder.get_object('volumebutton')
GObject.GObject.bind_property(volumebutton, "value",
self.player, "volume",
GObject.BindingFlags.BIDIRECTIONAL |
GObject.BindingFlags.SYNC_CREATE)
pause = builder.get_object('pause_spin')
back = builder.get_object('back_spin')
forward = builder.get_object('forward_spin')
self.player.set_property("pause", pause.get_value() * 1000)
self.player.set_property("back", back.get_value() * 1000)
self.player.set_property("forward", forward.get_value() * 1000)
self.timer = 0
self.win.show_all()
def update_progress(self, viewer, value):
self.progress.set_fraction(value)
def open_file(self, filename):
try:
self.player.open_uri(filename)
except Exception as err:
error_message(err.args[0], self.win)
if self.timer > 0:
self.viewer.remove_tick_callback(self.timer)
self.timer = 0
return
# this could also fail, skip checking in this example
self.viewer.load_wave_async(filename, None, None)
self.timer = self.viewer.add_tick_callback(self.update_cursor)
def filechooser(self, button):
dialog = Gtk.FileChooserDialog(
title="Please choose a file",
parent=self.win,
action=Gtk.FileChooserAction.OPEN)
dialog.add_button("_Cancel", Gtk.ResponseType.CANCEL)
dialog.add_button("_Open", Gtk.ResponseType.OK)
response = dialog.run()
if response == Gtk.ResponseType.OK:
self.open_file(dialog.get_uri())
dialog.destroy()
def player_error(self, player, error):
error_message(error.args[0], self.win)
Gtk.main_quit
def player_end_of_stream(self, player):
GObject.GObject.handler_block_by_func(self.button, self.button_toggled)
self.button.set_active(False)
GObject.GObject.handler_unblock_by_func(self.button, self.button_toggled)
self.player.pause()
def button_toggled(self, button):
if button.get_active():
self.viewer.set_property("follow-cursor", True)
self.player.play()
else:
self.player.pause_and_rewind()
def update_cursor(self, viewer, frame_clock):
viewer.set_property("playback-cursor", self.player.get_position())
text = self.player.get_current_time_string(
Pt.PrecisionType.SECOND_10TH)
# Sometimes the position can't be retrieved and None is returned.
if (text):
self.label.set_text(text)
# Continue updating
return True
def show_ruler_toggled(self, button):
self.viewer.set_property("show-ruler", button.get_active())
def fixed_cursor_toggled(self, button):
self.viewer.set_property("fixed-cursor", button.get_active())
def speed_value_changed(self, gtkrange):
self.player.set_speed(gtkrange.get_value())
def pause_value_changed(self, gtkrange):
self.player.set_property("pause", gtkrange.get_value() * 1000)
def back_value_changed(self, gtkrange):
self.player.set_property("back", gtkrange.get_value() * 1000)
def forward_value_changed(self, gtkrange):
self.player.set_property("forward", gtkrange.get_value() * 1000)
def back_clicked(self, button):
self.player.jump_back()
def forward_clicked(self, button):
self.player.jump_forward()
def main():
app = ParlatypeExample()
Gtk.main()
if __name__ == "__main__":
sys.exit(main()) |
