Adding scroll to the final output view using ipywidgets - python

I am trying to create an app based on ipywidgets. But unfortunately the scroll is not appearing as I expect it to be. Instead the scrolls are appearing on every output element, whereas I want a single scroll if the height of the content in any of the output element exceeds. Moreover it should not cut the visibility of the content in any of the output.
%%html
<style>
.out1{
width: 700px;
height: 400px;
display: flex;
justify-content: center;
padding: 10px 10px 10px 10px;
border: 1px solid black;
}
.out2{
width: 350px;
height: 400px;
display: flex;
justify-content: center;
padding: 20px 5px 10px 10px;
border: 1px solid black;
}
.out3{
width: 350px;
height: 400px;
display: flex;
justify-content: center;
padding: 20px 5px 10px 10px;
border: 1px solid black;
}
.out4{
width: 700px;
height: 400px;
display: flex;
justify-content: center;
padding: 20px 10px 0px 10px;
border: 1px solid black;
}
.out_box{
border: 1px solid black;
height: 800px;
width: 700px;
overflow: auto;
}
</style>
out1=widgets.Output()
out1.add_class('out1')
out2=widgets.Output()
out2.add_class('out2')
out3=widgets.Output()
out3.add_class('out3')
out4=widgets.Output()
out4.add_class('out4')
box1=widgets.Box([out1], scroll=False)
box2=widgets.HBox([out2,out3], scroll=False)
box3=widgets.Box([out4], scroll=False)
out_box=widgets.VBox([box1,box2,box3])
out_box.add_class('out_box')
Attached is the snap, which I am getting. Results with multiple scroll bars. But I want a single scroll bar at the right end.

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Is there a way to remove the container background (seen in attached pix as white around the rounded top/bottom of the scroll bar.
Here's my stylesheet:
QScrollBar:horizontal, QScrollBar:vertical
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QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal, QScrollBar::add-page:horizontal,
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How can make blackout on my images like when screen blackout due to cookie warning?

I want to do basic augmentation on my train datasets. I'll write the code but I need to help. How can I make blackout like this, can you send an example code (just for blackout) or anything?
As you see on below image, there is blackout on logo that is inside the red rectangle.
Example image:
You can do this
make a black container that fills the hole screen
and change it's opacity like this (or use rgba alpha for opacity).
body {
margin: 0;
padding: 0;
}
.container {
height: 100vh;
width: 100vw;
/* you can use opcity or rgba like below*/
background-color: rgba(0, 0, 0, 0.8);
/*or*/
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background-color: #000000;
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How to use css's :after for widgets in pyqt

I am thinking to create a PyQt6 Application.
I want that application to be more beautiful and modern. So I found some good looking css buttons and chose this codepen button:
* {
margin: 0;
padding: 0;
}
html,
body {
box-sizing: border-box;
height: 100%;
width: 100%;
}
body {
background: #FFF;
font-family: 'Noto Sans JP', sans-serif;
font-weight: 400;
}
.buttons {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
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height: 100%;
margin: 0 auto;
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.container {
align-items: center;
display: flex;
flex-direction: column;
justify-content: center;
text-align: center;
background-color: #FFF;
padding: 40px 0px;
width: 240px;
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h1 {
text-align: left;
color: #444;
letter-spacing: 0.05em;
margin: 0 0 0.4em;
font-size: 1em;
}
p {
text-align: left;
color: #444;
letter-spacing: 0.05em;
font-size: 0.8em;
margin: 0 0 2em;
}
.btn {
letter-spacing: 0.1em;
cursor: pointer;
font-size: 14px;
font-weight: 400;
line-height: 45px;
max-width: 160px;
position: relative;
text-decoration: none;
text-transform: uppercase;
width: 100%;
}
.btn:hover {
text-decoration: none;
}
/*btn_background*/
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color: #FFF;
border: 4px solid #000;
box-shadow:0px 0px 0px 1px #000 inset;
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overflow: hidden;
position: relative;
transition: all 0.3s ease-in-out;
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border: 4px solid #666;
background-color: #FFF;
box-shadow:0px 0px 0px 4px #EEE inset;
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.effect01 span {
transition: all 0.2s ease-out;
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letter-spacing: 0.13em;
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background: #FFF;
border: 0px solid #000;
content: "";
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left: -75px;
opacity: .8;
position: absolute;
top: -50px;
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transition: all 1s cubic-bezier(0.075, 0.82, 0.165, 1);/*easeOutCirc*/
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transform: rotate(40deg);
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<div class="container">
<h1>光の反射</h1>
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My question is: how can I use pyqt's functions to perform the :after.
I guess I cant just use a widget's stylesheet to perform.
Here is the Python Code that I have written so far:
from PyQt6.QtCore import QRect, Qt
from PyQt6.QtGui import QEnterEvent
from PyQt6.QtWidgets import QGraphicsOpacityEffect, QMainWindow, QPushButton
class QButton(QPushButton):
def __init__(self , main_window: QMainWindow):
super().__init__(main_window)
self.main_window = main_window
self.setText("Welcome")
self.render()
def render(self):
self.setStyleSheet("""
QPushButton{
background-color: #2E3440;
letter-spacing: 0.1px;
font-size: 14px;
font-weight: 400;
line-height: 45px;
text-decoration: none;
color: #FFF;
border: 4px solid #4C566A;
}
""")
self.setFlat(True)
self.setCursor(Qt.CursorShape.PointingHandCursor)
self.setGeometry(QRect(200 , 200 , 200 , 50))
def setText(self , text: str):
text = text.upper()
super().setText(text)
def enterEvent(self, event: QEnterEvent) -> None:
self.setStyleSheet("""
background-color: #D8DEE9;
letter-spacing: 0.13em;
color: #2E3440;
border: 0px;
""")
opacity = QGraphicsOpacityEffect()
opacity.setOpacity(.8)
self.setGraphicsEffect(opacity)
return super().enterEvent(event)
class Renderer:
def __init__(self, main_window: QMainWindow) -> None:
self.main_window = main_window
def render(self):
button = QButton(self.main_window)
if __name__ == "__main__":
app = QApplication([])
window = QMainWindow()
renderer = Renderer(window)
renderer.render()
window.show()
exit(app.exec())
Unfortunately, you can't. Qt Style Sheets are fundamentally based on CSS 2.1, and only support its basic implementation (see the syntax documentation).
If you want a more customized and advanced behavior, you have only two options:
subclass the widget and/or use QProxyStyle;
use QML;

I need a div to be pushed down when several options from a dcc.dropdown menu have been selected (dash component, python)

I am having trouble making the div below the 'multi' dropdown (dcc.dropdown from dash) to be pushed down when several options from the menu have been selected instead of overlapping as in the image below (or be sent to the back depending on the z-index). The dropdown is inside another div. I´ve tried changing css display and position with no positive outcome yet.
The code looks something like this:
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html.Div([
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html.Hr(),
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There is also CSS code for some components:
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position: fixed;
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font-size: 20px;
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overflow: hidden;
z-index:5;
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max-width:100%;
text-decoration: none;
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line-height:45px;
margin: 0px 0px 0px 0px;
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position:relative;
z-index:2;
display:inline-block;
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I am hoping the solution is with a change in the display or position property of an element but I believe it has something to do with the default css for the dash component which can be found here.
You can check out the dashboard in link
If I change the position of the .Select-menu-outer to relative as suggested by CBroe in the comments, the following will happen only when the menu is opened:
The problem was to set the height of the dcc.Dropdown to 20px, by just deleting 'height':'20px' the problem got solved

How to remove white background (on top and bottom) from popup of QComboBox?

I am creating a GUI app with qt5 and pyqt5.
I am trying to create a dark theme but I've got a problem with QComboBox.
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I tried a lot of ways, like padding or marge changing of values but nothing helped
I tried something mentioned already here
Remove QListView background
But always the same.
QComboBox {
font: 12pt Fira Sans Condensed;
background-color: #2e2e2e;
border-top: 0px solid #3e3e3e;
border-left: 0px solid #3e3e3e;
border-right: 0px solid #3e3e3e;
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color: white;
selection-background-color: #5e5e5e;
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QComboBox::drop-down {
border: none;
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image: url(icons/QComboBox/down-arrow.png);
width: 25px;
height: 25px;
border-width: 0px;
padding-right: 10px;
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QComboBox::down-arrow:pressed {
position: relative;
top: 1px; left: 1px;
}
QListView {
font: 12pt Fira Sans Condensed;
background-color: #2e2e2e;
outline: 0;
color: white;
selection-background-color: #5e5e5e;
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QListView::item {
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self.window.comboBox.addItem("test2")
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Here is what I get
Add I expect something without the white color on the top and bottom of the list
You have to set the color in the QFrame that is the parent of the view() directly:
self.window.comboBox.view().parentWidget().setStyleSheet('background-color: #2e2e2e;')

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