BreezeStyleSheets/example/slider.py

230 lines
7.4 KiB
Python

#!/usr/bin/env python
#
# The MIT License (MIT)
#
# Copyright (c) <2022-Present> <Alex Huszagh>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the 'Software'), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
'''
slider
======
Example showing how to add ticks to a QSlider. Note that this does
not work with stylesheets, so it's merely an example of how to
get customized styling behavior with a QSlider.
'''
import argparse
import os
import sys
example_dir = os.path.dirname(os.path.realpath(__file__))
home = os.path.dirname(example_dir)
dist = os.path.join(home, 'dist')
# Create our arguments.
parser = argparse.ArgumentParser(description='Configurations for the Qt5 application.')
parser.add_argument(
'--stylesheet',
help='''stylesheet name''',
default='native'
)
# Know working styles include:
# 1. Fusion
# 2. Windows
parser.add_argument(
'--style',
help='''application style, which is different than the stylesheet''',
default='native'
)
parser.add_argument(
'--font-size',
help='''font size for the application''',
type=float,
default=-1
)
parser.add_argument(
'--font-family',
help='''the font family'''
)
parser.add_argument(
'--scale',
help='''scale factor for the UI''',
type=float,
default=1,
)
parser.add_argument(
'--pyqt6',
help='''use PyQt6 rather than PyQt5.''',
action='store_true'
)
parser.add_argument(
'--use-x11',
help='''force the use of x11 on compatible systems.''',
action='store_true'
)
args, unknown = parser.parse_known_args()
if args.pyqt6:
from PyQt6 import QtCore, QtGui, QtWidgets
QtCore.QDir.addSearchPath(args.stylesheet, f'{dist}/pyqt6/{args.stylesheet}/')
resource_format = f'{args.stylesheet}:'
else:
sys.path.insert(0, home)
from PyQt5 import QtCore, QtGui, QtWidgets
import breeze_resources
resource_format = f':/{args.stylesheet}/'
stylesheet = f'{resource_format}stylesheet.qss'
# Compat definitions, between Qt5 and Qt6.
if args.pyqt6:
AlignHCenter = QtCore.Qt.AlignmentFlag.AlignHCenter
ReadOnly = QtCore.QFile.OpenModeFlag.ReadOnly
Text = QtCore.QFile.OpenModeFlag.Text
Horizontal = QtCore.Qt.Orientation.Horizontal
NoTicks = QtWidgets.QSlider.TickPosition.NoTicks
TicksAbove = QtWidgets.QSlider.TickPosition.TicksAbove
TicksBelow = QtWidgets.QSlider.TickPosition.TicksBelow
TicksBothSides = QtWidgets.QSlider.TickPosition.TicksBothSides
CC_Slider = QtWidgets.QStyle.ComplexControl.CC_Slider
SC_SliderHandle = QtWidgets.QStyle.SubControl.SC_SliderHandle
SC_SliderGroove = QtWidgets.QStyle.SubControl.SC_SliderGroove
else:
AlignHCenter = QtCore.Qt.AlignHCenter
ReadOnly = QtCore.QFile.ReadOnly
Text = QtCore.QFile.Text
Horizontal = QtCore.Qt.Horizontal
NoTicks = QtWidgets.QSlider.NoTicks
TicksAbove = QtWidgets.QSlider.TicksAbove
TicksBelow = QtWidgets.QSlider.TicksBelow
TicksBothSides = QtWidgets.QSlider.TicksBothSides
CC_Slider = QtWidgets.QStyle.CC_Slider
SC_SliderHandle = QtWidgets.QStyle.SC_SliderHandle
SC_SliderGroove = QtWidgets.QStyle.SC_SliderGroove
class Slider(QtWidgets.QSlider):
'''QSlider with a custom paint event.'''
def __init__(self, *args, **kwds):
super().__init__(*args, **kwds)
def paintEvent(self, event):
'''Override the paint event to ensure the ticks are painted.'''
painter = QtWidgets.QStylePainter(self)
options = QtWidgets.QStyleOptionSlider()
self.initStyleOption(options)
style = self.style()
handle = style.subControlRect(CC_Slider, options, SC_SliderHandle, self)
interval = self.tickInterval() or self.pageStep()
position = self.tickPosition()
if position != NoTicks and interval != 0:
minimum = self.minimum()
maximum = self.maximum()
color = self.palette().color(self.foregroundRole())
painter.setPen(color)
for i in range(minimum, maximum + interval, interval):
percent = (i - minimum) / (maximum - minimum + 1) + 0.005
width = (self.width() - handle.width()) + handle.width() / 2
x = int(percent * width)
h = 4
if position == TicksBothSides or position == TicksAbove:
y = self.rect().top()
painter.drawLine(x, y, x, y + h)
if position == TicksBothSides or position == TicksBelow:
y = self.rect().bottom()
painter.drawLine(x, y, x, y - h)
options.subControls = SC_SliderGroove
painter.drawComplexControl(CC_Slider, options)
options.subControls = SC_SliderHandle
painter.drawComplexControl(CC_Slider, options)
class Ui:
'''Main class for the user interface.'''
def setup(self, MainWindow):
MainWindow.setObjectName('MainWindow')
MainWindow.resize(1068, 824)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName('centralwidget')
self.layout = QtWidgets.QVBoxLayout(self.centralwidget)
self.layout.setObjectName('layout')
self.layout.setAlignment(AlignHCenter)
MainWindow.setCentralWidget(self.centralwidget)
self.slider = Slider(self.centralwidget)
self.slider.setOrientation(Horizontal)
self.slider.setTickInterval(5)
self.slider.setTickPosition(TicksAbove)
self.slider.setObjectName('slider')
self.layout.addWidget(self.slider)
def main():
'Application entry point'
if args.scale != 1:
os.environ['QT_SCALE_FACTOR'] = str(args.scale)
else:
os.environ['QT_AUTO_SCREEN_SCALE_FACTOR'] = '1'
app = QtWidgets.QApplication(sys.argv[:1] + unknown)
if args.style != 'native':
style = QtWidgets.QStyleFactory.create(args.style)
app.setStyle(style)
window = QtWidgets.QMainWindow()
# setup ui
ui = Ui()
ui.setup(window)
window.setWindowTitle('QSlider with Ticks.')
# use the default font size
font = app.font()
if args.font_size > 0:
font.setPointSizeF(args.font_size)
if args.font_family:
font.setFamily(args.font_family)
app.setFont(font)
# setup stylesheet
if args.stylesheet != 'native':
file = QtCore.QFile(stylesheet)
file.open(ReadOnly | Text)
stream = QtCore.QTextStream(file)
app.setStyleSheet(stream.readAll())
# run
window.show()
if args.pyqt6:
return app.exec()
else:
return app.exec_()
if __name__ == '__main__':
sys.exit(main())