Merge pull request #25 from exislow/pkce

Pkce

10 files changed, 488 insertions, 36 deletions

diff --git a/tidal_dl_ng/cli.py b/tidal_dl_ng/cli.py
index 1266f98..e84eafc 100644
--- a/tidal_dl_ng/cli.py
+++ b/tidal_dl_ng/cli.py
@@ -95,7 +95,7 @@ def login(ctx: typer.Context) -> bool:
 
     settings = Settings()
     tidal = Tidal(settings)
-    result = tidal.login(print)
+    result = tidal.login(fn_print=print)
     ctx.obj[CTX_TIDAL] = tidal
 
     return result
diff --git a/tidal_dl_ng/config.py b/tidal_dl_ng/config.py
index 12fa061..92eea3b 100644
--- a/tidal_dl_ng/config.py
+++ b/tidal_dl_ng/config.py
@@ -8,7 +8,7 @@ import tidalapi
 from requests import HTTPError
 
 from tidal_dl_ng.helper.decorator import SingletonMeta
-from tidal_dl_ng.helper.path import path_base, path_file_settings, path_file_token
+from tidal_dl_ng.helper.path import path_config_base, path_file_settings, path_file_token
 from tidal_dl_ng.model.cfg import Settings as ModelSettings
 from tidal_dl_ng.model.cfg import Token as ModelToken
 
@@ -17,7 +17,7 @@ class BaseConfig:
     data: ModelSettings | ModelToken
     file_path: str
     cls_model: ModelSettings | ModelToken
-    path_base: str = path_base()
+    path_base: str = path_config_base()
 
     def save(self, config_to_compare: str = None) -> None:
         data_json = self.data.to_json()
@@ -36,7 +36,8 @@ class BaseConfig:
         setattr(self.data, key, value)
 
     def read(self, path: str) -> bool:
-        result = False
+        result: bool = False
+        settings_json: str = ""
 
         try:
             with open(path, encoding="utf-8") as f:
@@ -116,10 +117,7 @@ class Tidal(BaseConfig, metaclass=SingletonMeta):
 
         return result
 
-    def login_oauth_start(self, function=print) -> None:
-        self.session.login_oauth_simple(function)
-
-    def login_oauth_finish(self) -> bool:
+    def login_finalize(self) -> bool:
         result = self.session.check_login()
 
         if result:
@@ -145,9 +143,12 @@ class Tidal(BaseConfig, metaclass=SingletonMeta):
         elif not is_token:
             fn_print("You either do not have a token or your token is invalid.")
             fn_print("No worries, we will handle this...")
-            self.login_oauth_start(fn_print)
+            # Login method: Device linking
+            # self.session.login_oauth_simple(fn_print)
+            # Login method: PKCE authorization (enables HiRes streaming)
+            self.session.login_pkce(fn_print)
 
-            is_login = self.login_oauth_finish()
+            is_login = self.login_finalize()
 
             if is_login:
                 fn_print("The login was successful. I have stored your credentials (token).")
diff --git a/tidal_dl_ng/dialog.py b/tidal_dl_ng/dialog.py
index 5370136..788aeba 100644
--- a/tidal_dl_ng/dialog.py
+++ b/tidal_dl_ng/dialog.py
@@ -1,6 +1,7 @@
 from PySide6.QtWidgets import QDialog
 
 from tidal_dl_ng import __version__
+from tidal_dl_ng.ui.dialog_login import Ui_DialogLogin
 from tidal_dl_ng.ui.dialog_version import Ui_DialogVersion
 
 
@@ -9,11 +10,39 @@ class DialogVersion(QDialog):
 
     def __init__(self, parent=None):
         super().__init__(parent)
+
         # Create an instance of the GUI
         self.ui = Ui_DialogVersion()
+
         # Run the .setupUi() method to show the GUI
         self.ui.setupUi(self)
         # Set the version.
         self.ui.l_version.setText("v" + __version__)
-
+        # Show
         self.exec()
+
+
+class DialogLogin(QDialog):
+    """Version dialog."""
+
+    url_redirect: str
+    return_code: int
+
+    def __init__(self, url_login: str, hint: str, parent=None):
+        super().__init__(parent)
+
+        # Create an instance of the GUI
+        self.ui = Ui_DialogLogin()
+
+        # Run the .setupUi() method to show the GUI
+        self.ui.setupUi(self)
+        # Set data.
+        self.ui.l_url_login.setText(f'<a href="{url_login}">{url_login}</a>')
+        self.ui.l_hint.setText(hint)
+        # Show
+        self.return_code = self.exec()
+
+        self.url_redirect = self.ui.te_url_redirect.toPlainText()
+
+    def accept1(self):
+        pass
diff --git a/tidal_dl_ng/download.py b/tidal_dl_ng/download.py
index 24720fb..5d2fe86 100644
--- a/tidal_dl_ng/download.py
+++ b/tidal_dl_ng/download.py
@@ -198,7 +198,9 @@ class Download:
 
         # Create file name and path
         file_name_relative = format_path_media(file_template, media)
-        path_file = os.path.abspath(os.path.normpath(os.path.join(self.path_base, file_name_relative)))
+        path_file = os.path.abspath(
+            os.path.normpath(os.path.join(os.path.expanduser(self.path_base), file_name_relative))
+        )
 
         # Populate StreamManifest for further download.
         if isinstance(media, Track):
@@ -366,18 +368,14 @@ class Download:
         if AudioExtensions.FLAC.value in stream_url:
             result: str = AudioExtensions.FLAC.value
         elif AudioExtensions.MP4.value in stream_url:
-            # TODO: Need to investigate, what the correct extension is.
-            # if "ac4" in stream_codec or "mha1" in stream_codec:
-            #     result = ".mp4"
-            # elif "flac" in stream_codec:
-            #     result = ".flac"
-            # else:
-            #     result = ".m4a"
-            result: str = AudioExtensions.MP4.value
+            if "ac4" in stream_codec or "mha1" in stream_codec or "flac" in stream_codec or "mp4a" in stream_codec:
+                result: str = AudioExtensions.M4A.value
+            else:
+                result: str = AudioExtensions.MP4.value
         elif VideoExtensions.TS.value in stream_url:
             result: str = VideoExtensions.TS.value
         else:
-            result: str = AudioExtensions.M4A.value
+            result: str = AudioExtensions.MP4.value
 
         return result
 
diff --git a/tidal_dl_ng/gui.py b/tidal_dl_ng/gui.py
index a12cd82..2a1b2d1 100644
--- a/tidal_dl_ng/gui.py
+++ b/tidal_dl_ng/gui.py
@@ -2,8 +2,10 @@ import math
 import sys
 from collections.abc import Callable
 
+from requests.exceptions import HTTPError
+
 from tidal_dl_ng import __version__
-from tidal_dl_ng.dialog import DialogVersion
+from tidal_dl_ng.dialog import DialogLogin, DialogVersion
 from tidal_dl_ng.helper.path import get_format_template
 from tidal_dl_ng.helper.tidal import items_results_all, search_results_all, user_media_lists
 
@@ -85,12 +87,29 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
             result = True
         else:
             self.tidal = Tidal(self.settings)
+            result = self.tidal.login_token()
+
+            if not result:
+                hint: str = "Watiting for user input."
+                while not result:
+                    url_login = self.tidal.session.pkce_login_url()
+                    d_login: DialogLogin = DialogLogin(url_login=url_login, hint=hint, parent=self)
+                    url_redirect: str = d_login.url_redirect
 
-            while True:
-                result = self.tidal.login(logger_gui.info)
+                    if d_login.return_code == 1:
+                        try:
+                            token: dict[str, str | int] = self.tidal.session.pkce_get_auth_token(url_redirect)
+                            self.tidal.session.process_auth_token(token)
+                            self.tidal.login_finalize()
 
-                if result:
-                    break
+                            result = True
+                            logger_gui.info("Login not successful. Have fun!")
+                        except (HTTPError, Exception):
+                            hint = "Something was wrong with your redirect url. Please try again!"
+                            logger_gui.warning("Login not successful. Try again...")
+                    else:
+                        # If user has pressed cancel.
+                        sys.exit(1)
 
         if result:
             # Init `Download` object.
diff --git a/tidal_dl_ng/helper/path.py b/tidal_dl_ng/helper/path.py
index a2ce98c..373f78c 100644
--- a/tidal_dl_ng/helper/path.py
+++ b/tidal_dl_ng/helper/path.py
@@ -23,7 +23,7 @@ def path_home() -> str:
         return os.path.abspath("./")
 
 
-def path_base() -> str:
+def path_config_base() -> str:
     path_config: str = ".config"
     path_base: str = os.path.join(path_home(), path_config, __name_display__)
 
@@ -34,30 +34,30 @@ def path_file_log() -> str:
     # TODO: Remove this soon. Only for migration to new dir.
     old = os.path.join(path_home(), ".tidal-dl-ng.log")
     if os.path.isfile(old):
-        os.makedirs(path_base(), exist_ok=True)
-        os.rename(old, os.path.join(path_base(), "app.log"))
+        os.makedirs(path_config_base(), exist_ok=True)
+        os.rename(old, os.path.join(path_config_base(), "app.log"))
 
-    return os.path.join(path_base(), "app.log")
+    return os.path.join(path_config_base(), "app.log")
 
 
 def path_file_token() -> str:
     # TODO: Remove this soon. Only for migration to new dir.
     old = os.path.join(path_home(), ".tidal-dl-ng_token.json")
     if os.path.isfile(old):
-        os.makedirs(path_base(), exist_ok=True)
-        os.rename(old, os.path.join(path_base(), "token.json"))
+        os.makedirs(path_config_base(), exist_ok=True)
+        os.rename(old, os.path.join(path_config_base(), "token.json"))
 
-    return os.path.join(path_base(), "token.json")
+    return os.path.join(path_config_base(), "token.json")
 
 
 def path_file_settings() -> str:
     # TODO: Remove this soon. Only for migration to new dir.
     old = os.path.join(path_home(), ".tidal-dl-ng_settings.json")
     if os.path.isfile(old):
-        os.makedirs(path_base(), exist_ok=True)
-        os.rename(old, os.path.join(path_base(), "settings.json"))
+        os.makedirs(path_config_base(), exist_ok=True)
+        os.rename(old, os.path.join(path_config_base(), "settings.json"))
 
-    return os.path.join(path_base(), "settings.json")
+    return os.path.join(path_config_base(), "settings.json")
 
 
 def format_path_media(fmt_template: str, media: Track | Album | Playlist | UserPlaylist | Video | Mix) -> str:
diff --git a/tidal_dl_ng/ui/dialog_login.py b/tidal_dl_ng/ui/dialog_login.py
new file mode 100644
index 0000000..ffb8e76
--- /dev/null
+++ b/tidal_dl_ng/ui/dialog_login.py
@@ -0,0 +1,110 @@
+################################################################################
+## Form generated from reading UI file 'dialog_login.ui'
+##
+## Created by: Qt User Interface Compiler version 6.6.1
+##
+## WARNING! All changes made in this file will be lost when recompiling UI file!
+################################################################################
+
+from PySide6.QtCore import QCoreApplication, QMetaObject, QRect, QSize, Qt
+from PySide6.QtGui import QFont
+from PySide6.QtWidgets import QDialogButtonBox, QLabel, QSizePolicy, QTextEdit, QVBoxLayout, QWidget
+
+
+class Ui_DialogLogin:
+    def setupUi(self, DialogLogin):
+        if not DialogLogin.objectName():
+            DialogLogin.setObjectName("DialogLogin")
+        DialogLogin.resize(451, 400)
+        sizePolicy = QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(DialogLogin.sizePolicy().hasHeightForWidth())
+        DialogLogin.setSizePolicy(sizePolicy)
+        self.bb_dialog = QDialogButtonBox(DialogLogin)
+        self.bb_dialog.setObjectName("bb_dialog")
+        self.bb_dialog.setGeometry(QRect(20, 350, 411, 32))
+        sizePolicy.setHeightForWidth(self.bb_dialog.sizePolicy().hasHeightForWidth())
+        self.bb_dialog.setSizePolicy(sizePolicy)
+        self.bb_dialog.setStyleSheet("")
+        self.bb_dialog.setOrientation(Qt.Horizontal)
+        self.bb_dialog.setStandardButtons(QDialogButtonBox.Cancel | QDialogButtonBox.Ok)
+        self.verticalLayoutWidget = QWidget(DialogLogin)
+        self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")
+        self.verticalLayoutWidget.setGeometry(QRect(20, 20, 411, 321))
+        self.lv_main = QVBoxLayout(self.verticalLayoutWidget)
+        self.lv_main.setObjectName("lv_main")
+        self.lv_main.setContentsMargins(0, 0, 0, 0)
+        self.l_header = QLabel(self.verticalLayoutWidget)
+        self.l_header.setObjectName("l_header")
+        sizePolicy.setHeightForWidth(self.l_header.sizePolicy().hasHeightForWidth())
+        self.l_header.setSizePolicy(sizePolicy)
+        font = QFont()
+        font.setPointSize(23)
+        font.setBold(True)
+        self.l_header.setFont(font)
+
+        self.lv_main.addWidget(self.l_header)
+
+        self.l_description = QLabel(self.verticalLayoutWidget)
+        self.l_description.setObjectName("l_description")
+        sizePolicy.setHeightForWidth(self.l_description.sizePolicy().hasHeightForWidth())
+        self.l_description.setSizePolicy(sizePolicy)
+        font1 = QFont()
+        font1.setItalic(True)
+        self.l_description.setFont(font1)
+        self.l_description.setWordWrap(True)
+
+        self.lv_main.addWidget(self.l_description)
+
+        self.l_url_login = QLabel(self.verticalLayoutWidget)
+        self.l_url_login.setObjectName("l_url_login")
+        sizePolicy.setHeightForWidth(self.l_url_login.sizePolicy().hasHeightForWidth())
+        self.l_url_login.setSizePolicy(sizePolicy)
+        self.l_url_login.setMinimumSize(QSize(0, 50))
+        self.l_url_login.setBaseSize(QSize(0, 0))
+        self.l_url_login.setStyleSheet("border: 2px solid red; padding: 6px")
+        self.l_url_login.setWordWrap(True)
+        self.l_url_login.setOpenExternalLinks(True)
+
+        self.lv_main.addWidget(self.l_url_login)
+
+        self.te_url_redirect = QTextEdit(self.verticalLayoutWidget)
+        self.te_url_redirect.setObjectName("te_url_redirect")
+
+        self.lv_main.addWidget(self.te_url_redirect)
+
+        self.l_hint = QLabel(self.verticalLayoutWidget)
+        self.l_hint.setObjectName("l_hint")
+        sizePolicy.setHeightForWidth(self.l_hint.sizePolicy().hasHeightForWidth())
+        self.l_hint.setSizePolicy(sizePolicy)
+        self.l_hint.setFont(font1)
+
+        self.lv_main.addWidget(self.l_hint)
+
+        self.retranslateUi(DialogLogin)
+        self.bb_dialog.accepted.connect(DialogLogin.accept)
+        self.bb_dialog.rejected.connect(DialogLogin.reject)
+
+        QMetaObject.connectSlotsByName(DialogLogin)
+
+    # setupUi
+
+    def retranslateUi(self, DialogLogin):
+        DialogLogin.setWindowTitle(QCoreApplication.translate("DialogLogin", "Dialog", None))
+        self.l_header.setText(QCoreApplication.translate("DialogLogin", "TIDAL PKCE Login", None))
+        self.l_description.setText(
+            QCoreApplication.translate(
+                "DialogLogin",
+                'Click the link below and login with your TIDAL credentials. You will be redirected to an "Ooops" page'
+                ' after a successful login. Copy the URL of this "Ooops" page and post it in the box below.',
+                None,
+            )
+        )
+        self.l_url_login.setText(QCoreApplication.translate("DialogLogin", "PLACEHOLDER URL...", None))
+        self.te_url_redirect.setPlaceholderText(
+            QCoreApplication.translate("DialogLogin", "Copy and paste the redirect URL after login here...", None)
+        )
+        self.l_hint.setText(QCoreApplication.translate("DialogLogin", "Waiting...", None))
+
+    # retranslateUi
diff --git a/tidal_dl_ng/ui/dialog_login.ui b/tidal_dl_ng/ui/dialog_login.ui
new file mode 100644
index 0000000..ae0a25a
--- /dev/null
+++ b/tidal_dl_ng/ui/dialog_login.ui
@@ -0,0 +1,194 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>DialogLogin</class>
+ <widget class="QDialog" name="DialogLogin">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>451</width>
+    <height>400</height>
+   </rect>
+  </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <widget class="QDialogButtonBox" name="bb_dialog">
+   <property name="geometry">
+    <rect>
+     <x>20</x>
+     <y>350</y>
+     <width>411</width>
+     <height>32</height>
+    </rect>
+   </property>
+   <property name="sizePolicy">
+    <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+     <horstretch>0</horstretch>
+     <verstretch>0</verstretch>
+    </sizepolicy>
+   </property>
+   <property name="styleSheet">
+    <string notr="true"/>
+   </property>
+   <property name="orientation">
+    <enum>Qt::Horizontal</enum>
+   </property>
+   <property name="standardButtons">
+    <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+   </property>
+  </widget>
+  <widget class="QWidget" name="verticalLayoutWidget">
+   <property name="geometry">
+    <rect>
+     <x>20</x>
+     <y>20</y>
+     <width>411</width>
+     <height>321</height>
+    </rect>
+   </property>
+   <layout class="QVBoxLayout" name="lv_main">
+    <item>
+     <widget class="QLabel" name="l_header">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="font">
+       <font>
+        <pointsize>23</pointsize>
+        <bold>true</bold>
+       </font>
+      </property>
+      <property name="text">
+       <string>TIDAL PKCE Login</string>
+      </property>
+     </widget>
+    </item>
+    <item>
+     <widget class="QLabel" name="l_description">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="font">
+       <font>
+        <italic>true</italic>
+       </font>
+      </property>
+      <property name="text">
+       <string>Click the link below and login with your TIDAL credentials. You will be redirected to an &quot;Ooops&quot; page after a successful login. Copy the URL of this &quot;Ooops&quot; page and post it in the box below.</string>
+      </property>
+      <property name="wordWrap">
+       <bool>true</bool>
+      </property>
+     </widget>
+    </item>
+    <item>
+     <widget class="QLabel" name="l_url_login">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="minimumSize">
+       <size>
+        <width>0</width>
+        <height>50</height>
+       </size>
+      </property>
+      <property name="baseSize">
+       <size>
+        <width>0</width>
+        <height>0</height>
+       </size>
+      </property>
+      <property name="styleSheet">
+       <string notr="true">border: 2px solid red; padding: 6px</string>
+      </property>
+      <property name="text">
+       <string>PLACEHOLDER URL...</string>
+      </property>
+      <property name="wordWrap">
+       <bool>true</bool>
+      </property>
+      <property name="openExternalLinks">
+       <bool>true</bool>
+      </property>
+     </widget>
+    </item>
+    <item>
+     <widget class="QTextEdit" name="te_url_redirect">
+      <property name="placeholderText">
+       <string>Copy and paste the redirect URL after login here...</string>
+      </property>
+     </widget>
+    </item>
+    <item>
+     <widget class="QLabel" name="l_hint">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="font">
+       <font>
+        <italic>true</italic>
+       </font>
+      </property>
+      <property name="text">
+       <string>Waiting...</string>
+      </property>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>bb_dialog</sender>
+   <signal>accepted()</signal>
+   <receiver>DialogLogin</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>bb_dialog</sender>
+   <signal>rejected()</signal>
+   <receiver>DialogLogin</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>
diff --git a/tidal_dl_ng/ui/dummy_register.py b/tidal_dl_ng/ui/dummy_register.py
new file mode 100644
index 0000000..dfffdc2
--- /dev/null
+++ b/tidal_dl_ng/ui/dummy_register.py
@@ -0,0 +1,33 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+from PySide6.QtDesigner import QPyDesignerCustomWidgetCollection
+
+from .dummy_wiggly import WigglyWidget
+
+# Set PYSIDE_DESIGNER_PLUGINS to point to this directory and load the plugin
+
+
+TOOLTIP = "A cool wiggly widget (Python)"
+DOM_XML = """
+<ui language='c++'>
+    <widget class='WigglyWidget' name='wigglyWidget'>
+        <property name='geometry'>
+            <rect>
+                <x>0</x>
+                <y>0</y>
+                <width>400</width>
+                <height>200</height>
+            </rect>
+        </property>
+        <property name='text'>
+            <string>Hello, world</string>
+        </property>
+    </widget>
+</ui>
+"""
+
+if __name__ == "__main__":
+    QPyDesignerCustomWidgetCollection.registerCustomWidget(
+        WigglyWidget, module="wigglywidget", tool_tip=TOOLTIP, xml=DOM_XML
+    )
diff --git a/tidal_dl_ng/ui/dummy_wiggly.py b/tidal_dl_ng/ui/dummy_wiggly.py
new file mode 100644
index 0000000..e6eb3d3
--- /dev/null
+++ b/tidal_dl_ng/ui/dummy_wiggly.py
@@ -0,0 +1,68 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+from PySide6.QtCore import Property, QBasicTimer
+from PySide6.QtGui import QColor, QFontMetrics, QPainter, QPalette
+from PySide6.QtWidgets import QWidget
+
+
+class WigglyWidget(QWidget):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._step = 0
+        self._text = ""
+        self.setBackgroundRole(QPalette.Midlight)
+        self.setAutoFillBackground(True)
+
+        new_font = self.font()
+        new_font.setPointSize(new_font.pointSize() + 20)
+        self.setFont(new_font)
+        self._timer = QBasicTimer()
+
+    def isRunning(self):
+        return self._timer.isActive()
+
+    def setRunning(self, r):
+        if r == self.isRunning():
+            return
+        if r:
+            self._timer.start(60, self)
+        else:
+            self._timer.stop()
+
+    def paintEvent(self, event):
+        if not self._text:
+            return
+
+        sineTable = [0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100, -92, -71, -38]
+
+        metrics = QFontMetrics(self.font())
+        x = (self.width() - metrics.horizontalAdvance(self.text)) / 2
+        y = (self.height() + metrics.ascent() - metrics.descent()) / 2
+        color = QColor()
+
+        with QPainter(self) as painter:
+            for i in range(len(self.text)):
+                index = (self._step + i) % 16
+                color.setHsv((15 - index) * 16, 255, 191)
+                painter.setPen(color)
+                dy = (sineTable[index] * metrics.height()) / 400
+                c = self._text[i]
+                painter.drawText(x, y - dy, str(c))
+                x += metrics.horizontalAdvance(c)
+
+    def timerEvent(self, event):
+        if event.timerId() == self._timer.timerId():
+            self._step += 1
+            self.update()
+        else:
+            QWidget.timerEvent(event)
+
+    def text(self):
+        return self._text
+
+    def setText(self, text):
+        self._text = text
+
+    running = Property(bool, isRunning, setRunning)
+    text = Property(str, text, setText)