I need to put a semi-transparent background to a PyQt5 window (by semi-transparent I mean it is possible to see what is behind it.).
What I saw in many other subjects is that the idea is to use a rgba color. For example putting something like this self.setStyleSheet('background-color: rgba(128, 128, 128, 120);'), where 120 correspond to alpha.
But I tried this and it is not working (see example below) and I don't understand why.
Any help would be greatly appreciated !
ps : I also tried to test setStyleSheet("background:transparent;") and this is also not working...
#!/usr/bin/env python3
"""
The MIT License (MIT)
Copyright (c) 2017 fbjorn
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.
"""
import sys
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from pyqtspinner.spinner import WaitingSpinner
class Demo(QWidget):
sb_roundness = None
sb_opacity = None
sb_fadeperc = None
sb_lines = None
sb_line_length = None
sb_line_width = None
sb_inner_radius = None
sb_rev_s = None
btn_start = None
btn_stop = None
btn_pick_color = None
spinner = None
def __init__(self):
super().__init__()
self.init_ui()
def init_ui(self):
grid = QGridLayout()
groupbox1 = QGroupBox()
groupbox1_layout = QHBoxLayout()
groupbox2 = QGroupBox()
groupbox2_layout = QGridLayout()
button_hbox = QHBoxLayout()
self.setLayout(grid)
self.setWindowTitle("QtWaitingSpinner Demo")
self.setStyleSheet('background-color: rgba(128, 128, 128, 120);')
self.setWindowFlags(Qt.Dialog)
# SPINNER
self.spinner = WaitingSpinner(self)
# Spinboxes
self.sb_roundness = QDoubleSpinBox()
self.sb_opacity = QDoubleSpinBox()
self.sb_fadeperc = QDoubleSpinBox()
self.sb_lines = QSpinBox()
self.sb_line_length = QDoubleSpinBox()
self.sb_line_width = QDoubleSpinBox()
self.sb_inner_radius = QDoubleSpinBox()
self.sb_rev_s = QDoubleSpinBox()
# set spinbox default values
self.sb_roundness.setValue(70)
self.sb_roundness.setRange(0, 9999)
self.sb_opacity.setValue(15)
self.sb_opacity.setRange(0, 9999)
self.sb_fadeperc.setValue(70)
self.sb_fadeperc.setRange(0, 9999)
self.sb_lines.setValue(12)
self.sb_lines.setRange(1, 9999)
self.sb_line_length.setValue(10)
self.sb_line_length.setRange(0, 9999)
self.sb_line_width.setValue(5)
self.sb_line_width.setRange(0, 9999)
self.sb_inner_radius.setValue(10)
self.sb_inner_radius.setRange(0, 9999)
self.sb_rev_s.setValue(1)
self.sb_rev_s.setRange(0.1, 9999)
# Buttons
self.btn_start = QPushButton("Start")
self.btn_stop = QPushButton("Stop")
self.btn_pick_color = QPushButton("Pick Color")
self.btn_show_init = QPushButton("Show init args")
# Connects
self.sb_roundness.valueChanged.connect(self.set_roundness)
self.sb_opacity.valueChanged.connect(self.set_opacity)
self.sb_fadeperc.valueChanged.connect(self.set_fadeperc)
self.sb_lines.valueChanged.connect(self.set_lines)
self.sb_line_length.valueChanged.connect(self.set_line_length)
self.sb_line_width.valueChanged.connect(self.set_line_width)
self.sb_inner_radius.valueChanged.connect(self.set_inner_radius)
self.sb_rev_s.valueChanged.connect(self.set_rev_s)
self.btn_start.clicked.connect(self.spinner_start)
self.btn_stop.clicked.connect(self.spinner_stop)
self.btn_pick_color.clicked.connect(self.show_color_picker)
self.btn_show_init.clicked.connect(self.show_init_args)
# Layout adds
groupbox1_layout.addWidget(self.spinner)
groupbox1.setLayout(groupbox1_layout)
groupbox2_layout.addWidget(QLabel("Roundness:"), *(1, 1))
groupbox2_layout.addWidget(self.sb_roundness, *(1, 2))
groupbox2_layout.addWidget(QLabel("Opacity:"), *(2, 1))
groupbox2_layout.addWidget(self.sb_opacity, *(2, 2))
groupbox2_layout.addWidget(QLabel("Fade Perc:"), *(3, 1))
groupbox2_layout.addWidget(self.sb_fadeperc, *(3, 2))
groupbox2_layout.addWidget(QLabel("Lines:"), *(4, 1))
groupbox2_layout.addWidget(self.sb_lines, *(4, 2))
groupbox2_layout.addWidget(QLabel("Line Length:"), *(5, 1))
groupbox2_layout.addWidget(self.sb_line_length, *(5, 2))
groupbox2_layout.addWidget(QLabel("Line Width:"), *(6, 1))
groupbox2_layout.addWidget(self.sb_line_width, *(6, 2))
groupbox2_layout.addWidget(QLabel("Inner Radius:"), *(7, 1))
groupbox2_layout.addWidget(self.sb_inner_radius, *(7, 2))
groupbox2_layout.addWidget(QLabel("Rev/s:"), *(8, 1))
groupbox2_layout.addWidget(self.sb_rev_s, *(8, 2))
groupbox2.setLayout(groupbox2_layout)
button_hbox.addWidget(self.btn_start)
button_hbox.addWidget(self.btn_stop)
button_hbox.addWidget(self.btn_pick_color)
button_hbox.addWidget(self.btn_show_init)
grid.addWidget(groupbox1, *(1, 1))
grid.addWidget(groupbox2, *(1, 2))
grid.addLayout(button_hbox, *(2, 1))
self.spinner.start()
self.show()
def set_roundness(self):
self.spinner.setRoundness(self.sb_roundness.value())
def set_opacity(self):
self.spinner.setMinimumTrailOpacity(self.sb_opacity.value())
def set_fadeperc(self):
self.spinner.setTrailFadePercentage(self.sb_fadeperc.value())
def set_lines(self):
self.spinner.setNumberOfLines(self.sb_lines.value())
def set_line_length(self):
self.spinner.setLineLength(self.sb_line_length.value())
def set_line_width(self):
self.spinner.setLineWidth(self.sb_line_width.value())
def set_inner_radius(self):
self.spinner.setInnerRadius(self.sb_inner_radius.value())
def set_rev_s(self):
self.spinner.setRevolutionsPerSecond(self.sb_rev_s.value())
def spinner_start(self):
self.spinner.start()
def spinner_stop(self):
self.spinner.stop()
def show_color_picker(self):
self.spinner.setColor(QColorDialog.getColor())
def show_init_args(self):
text = (
'WaitingSpinner(\n'
' parent,\n'
' roundness={}, opacity={},\n'
' fade={}, radius={}, lines={},\n'
' line_length={}, line_width={},\n'
' speed={}, color={}\n'
')\n'
).format(
self.sb_roundness.value(), self.sb_opacity.value(),
self.sb_fadeperc.value(), self.sb_inner_radius.value(),
self.sb_lines.value(), self.sb_line_length.value(),
self.sb_line_width.value(), self.sb_rev_s.value(),
self.spinner.color.getRgb()[:3]
)
msg_box = QMessageBox(text=text)
msg_box.setWindowTitle('Text was copied to clipboard')
cb = QApplication.clipboard()
cb.clear(mode=cb.Clipboard)
cb.setText(text, mode=cb.Clipboard)
print(text)
msg_box.exec_()
if __name__ == '__main__':
app = QApplication(sys.argv)
main = Demo()
sys.exit(app.exec())
ps: I am sorry but I am afraid no solution is provided it the "duplicates" that are mentionned and the comments... Please reopen the subject. Hello ?