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openlp/openlp/core/ui/style.py

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# -*- coding: utf-8 -*-
##########################################################################
# OpenLP - Open Source Lyrics Projection #
# ---------------------------------------------------------------------- #
# Copyright (c) 2008-2022 OpenLP Developers #
# ---------------------------------------------------------------------- #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
##########################################################################
"""
The :mod:`~openlp.core.ui.dark` module looks for and loads a dark theme
"""
from subprocess import Popen, PIPE
from enum import Enum
from PyQt5 import QtCore, QtGui, QtWidgets
from openlp.core.common import is_macosx, is_win
from openlp.core.common.registry import Registry
try:
import qdarkstyle
HAS_DARK_THEME = True
except ImportError:
HAS_DARK_THEME = False
WIN_REPAIR_STYLESHEET = """
QMainWindow::separator
{
border: none;
}
QDockWidget::title
{
border: 1px solid palette(dark);
padding-left: 5px;
padding-top: 2px;
margin: 1px 0;
}
QToolBar
{
border: none;
margin: 0;
padding: 0;
}
"""
MEDIA_MANAGER_STYLE = """
::tab#media_tool_box {
background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,
stop: 0 palette(button), stop: 1.0 palette(mid));
border: 0;
border-radius: 2px;
margin-top: 0;
margin-bottom: 0;
text-align: left;
}
/* This is here to make the tabs on KDE with the Breeze theme work */
::tab:selected {}
"""
PROGRESSBAR_STYLE = """
QProgressBar{
height: 10px;
}
"""
class UiThemes(Enum):
"""
An enumeration for themes.
"""
Automatic = 'automatic'
DefaultLight = 'light:default'
DefaultDark = 'dark:default'
QDarkStyle = 'dark:qdarkstyle'
def is_ui_theme_dark():
ui_theme_name = Registry().get('settings').value('advanced/ui_theme_name')
if ui_theme_name == UiThemes.Automatic:
return is_system_darkmode()
else:
return ui_theme_name.value.startswith('dark:')
def is_ui_theme(ui_theme: UiThemes):
ui_theme_name = Registry().get('settings').value('advanced/ui_theme_name')
return ui_theme_name == ui_theme
def init_ui_theme_if_needed(ui_theme_name):
return not isinstance(ui_theme_name, UiThemes)
def has_ui_theme(ui_theme: UiThemes):
if ui_theme == UiThemes.QDarkStyle:
return HAS_DARK_THEME
return True
IS_SYSTEM_DARKMODE = None
def is_system_darkmode():
global IS_SYSTEM_DARKMODE
if IS_SYSTEM_DARKMODE is None:
try:
if is_win():
IS_SYSTEM_DARKMODE = is_windows_darkmode()
elif is_macosx():
IS_SYSTEM_DARKMODE = is_macosx_darkmode()
else:
IS_SYSTEM_DARKMODE = False
except Exception:
IS_SYSTEM_DARKMODE = False
return IS_SYSTEM_DARKMODE
def is_windows_darkmode():
"""
Detects if Windows is using dark mode system theme.
Source: https://github.com/olivierkes/manuskript/blob/731e017e9e0dd7e4062f1af419705c11b2825515/manuskript/main.py
(GPL3)
Changes:
* Allowed palette to be set on any operating system;
* Split Windows Dark Mode detection to another function.
"""
theme_settings = QtCore.QSettings('HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Themes'
'\\Personalize',
QtCore.QSettings.NativeFormat)
return theme_settings.value('AppsUseLightTheme') == 0
def is_macosx_darkmode():
"""
Detects if Mac OS X is using dark mode system theme.
Source: https://stackoverflow.com/a/65357166 (CC BY-SA 4.0)
Changes:
* Using OpenLP formatting rules
* Handling exceptions
"""
try:
command = 'defaults read -g AppleInterfaceStyle'
process = Popen(command, stdout=PIPE, stderr=PIPE, shell=True)
stdin = process.communicate()[0]
return bool(stdin)
except Exception:
return False
def set_default_theme(app):
"""
Setup theme
"""
if is_ui_theme(UiThemes.DefaultDark) or (is_ui_theme(UiThemes.Automatic) and is_ui_theme_dark()):
set_default_darkmode(app)
elif is_ui_theme(UiThemes.DefaultLight):
set_default_lightmode(app)
def set_default_lightmode(app):
"""
Setup lightmode on the application if Default Lightt theme is enabled in the OpenLP Settings.
"""
app.setStyle('Fusion')
app.setPalette(app.style().standardPalette())
def set_default_darkmode(app):
"""
Setup darkmode on the application if enabled in the OpenLP Settings or using a dark mode system theme.
Source:
https://github.com/olivierkes/manuskript/blob/731e017e9e0dd7e4062f1af419705c11b2825515/manuskript/main.py
(GPL3)
Changes:
* Allowed palette to be set on any operating system;
* Split Windows Dark Mode detection to another function.
"""
app.setStyle('Fusion')
dark_palette = QtGui.QPalette()
dark_color = QtGui.QColor(45, 45, 45)
disabled_color = QtGui.QColor(127, 127, 127)
dark_palette.setColor(QtGui.QPalette.Window, dark_color)
dark_palette.setColor(QtGui.QPalette.WindowText, QtCore.Qt.white)
dark_palette.setColor(QtGui.QPalette.Disabled, QtGui.QPalette.WindowText, disabled_color)
dark_palette.setColor(QtGui.QPalette.Base, QtGui.QColor(18, 18, 18))
dark_palette.setColor(QtGui.QPalette.AlternateBase, dark_color)
dark_palette.setColor(QtGui.QPalette.ToolTipBase, QtCore.Qt.white)
dark_palette.setColor(QtGui.QPalette.ToolTipText, QtCore.Qt.black)
dark_palette.setColor(QtGui.QPalette.Text, QtCore.Qt.white)
dark_palette.setColor(QtGui.QPalette.Disabled, QtGui.QPalette.Text, disabled_color)
dark_palette.setColor(QtGui.QPalette.Button, dark_color)
dark_palette.setColor(QtGui.QPalette.ButtonText, QtCore.Qt.white)
dark_palette.setColor(QtGui.QPalette.Disabled, QtGui.QPalette.ButtonText, disabled_color)
dark_palette.setColor(QtGui.QPalette.BrightText, QtCore.Qt.red)
dark_palette.setColor(QtGui.QPalette.Link, QtGui.QColor(42, 130, 218))
dark_palette.setColor(QtGui.QPalette.Highlight, QtGui.QColor(42, 130, 218))
dark_palette.setColor(QtGui.QPalette.HighlightedText, QtCore.Qt.black)
dark_palette.setColor(QtGui.QPalette.Disabled, QtGui.QPalette.HighlightedText, disabled_color)
# Fixes ugly (not to mention hard to read) disabled menu items.
# Source: https://bugreports.qt.io/browse/QTBUG-10322?focusedCommentId=371060#comment-371060
dark_palette.setColor(QtGui.QPalette.Disabled, QtGui.QPalette.Light, QtCore.Qt.transparent)
# Fixes ugly media manager headers.
dark_palette.setColor(QtGui.QPalette.Mid, QtGui.QColor(64, 64, 64))
app.setPalette(dark_palette)
def get_application_stylesheet():
"""
Return the correct application stylesheet based on the current style and operating system
:return str: The correct stylesheet as a string
"""
stylesheet = ''
if is_ui_theme(UiThemes.QDarkStyle):
stylesheet = qdarkstyle.load_stylesheet_pyqt5()
else:
if not Registry().get('settings').value('advanced/alternate rows'):
base_color = QtWidgets.QApplication.palette().color(QtGui.QPalette.Active, QtGui.QPalette.Base)
alternate_rows_repair_stylesheet = \
'QTableWidget, QListWidget, QTreeWidget {alternate-background-color: ' + base_color.name() + ';}\n'
stylesheet += alternate_rows_repair_stylesheet
if is_win():
stylesheet += WIN_REPAIR_STYLESHEET
return stylesheet
def get_library_stylesheet():
"""
Return the correct stylesheet for the main window
:return str: The correct stylesheet as a string
"""
if not is_ui_theme(UiThemes.QDarkStyle):
return MEDIA_MANAGER_STYLE
else:
return ''
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