PyQt5- | PyQt5 learning case
kandi X-RAY | PyQt5- Summary
kandi X-RAY | PyQt5- Summary
PyQt5 learning case
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Top functions reviewed by kandi - BETA
- Initializes the UI .
- Start timer .
- set color
- change changed value
- do action
- Draw the pixmap .
- Open file dialog
- Close the dialog box .
- Changes the title .
- Initialize the widget .
PyQt5- Key Features
PyQt5- Examples and Code Snippets
Community Discussions
Trending Discussions on PyQt5-
QUESTION
When I put Qt widgets in a QHBoxLayout
layout using QT Designer, there seems to be a minimum width for QLineEdit
widgets of 17 x's, at least if this is the current source code:
https://github.com/qt/qtbase/blob/dev/src/widgets/widgets/qlineedit.cpp
I cannot find a way to make PyQt5 lay those widgets out so they will be narrower than this default, but still change size if the font is changed.
As an example, a QComboBox
will be automatically laid out so that it is just wide enough to display the longest text that is entered as a possible value. If the longest text entered for a combobox in Designer is 5 characters, the combobox will be laid out as quite narrow compared to the minimum QLineEdit
width. How can I configure a QLineEdit
with a number of characters so that it is always wide enough for that many characters, whatever the font is set to, and no wider, using just QT Designer? I know in Designer I can enter maxLength
, which will limit the maximum number of characters that can be entered/displayed, but that setting of course has no effect on the layout.
I have some text boxes that will never have more than 5 characters in them, for example, and the layout with Designer makes them at least 3 times wider than I will ever need. This is using the default "Expanding" horizontal policy, but I have tried many combinations of horizontal policy and values for minimum size or base size. I want to allow for people to have different font sizes, so I cannot safely set a maximum pixel size and I cannot safely set a fixed horizontal size. The handling for QComboBox
es is precisely what I want for QLineEdit
s.
This is all in python using the latest versions of PyQt5 available on Pip, pyqt5 5.15.6 and pyqt5-qt5 5.15.2.
...ANSWER
Answered 2022-Mar-11 at 12:17The size hint of QLineEdit is computed considering various aspects, most of them using private functions that are not exposed to the API, and the "x" count is hardcoded, meaning that this cannot be achieved directly from Designer, and can only be done through subclassing.
While we could try to mimic its behavior to implement a custom character size, I believe it is unnecessary for simple cases, so I simplified the concept by taking the default size hint and adapting the width based on the difference between the custom character hint and the default 17 "x" count.
QUESTION
I am building a PyQt5 application by constructing the interfaces with the designer and the exporting to .ui
files. The latter are then loaded by my main class. Here is an example of my source code under the name main.py
:
main.py
...ANSWER
Answered 2022-Mar-08 at 19:16Add this somewhere at the top of your program:
QUESTION
I have a problem installing a PyQt5 python package. I am in Yocto Linux environment (Hardknott kernel 5.10.35) on the Variscite board (DART-MX8M-PLUS). This is the log when I try to install with pip:
...ANSWER
Answered 2022-Mar-01 at 15:02Do not bother installing packages natively on the board,
PyQt5
is already supported by Yocto
in meta-qt5
, link to recipe.
Just add meta-qt5
to your bblayers.conf
and :
QUESTION
I tried to create video player for mp4 in windows 10 os. it is always showing error. i tried multiple method. but always failing
- I tried code from this location https://pythonprogramminglanguage.com/pyqt5-video-widget/
QMediaPlayer error:
- I tried python-vlc. it is working only when I already installed vlc player. if i uninstalled vlc player it is not working
vlc error :
...ANSWER
Answered 2022-Jan-29 at 08:19As couldn't able to find direct player. I used cv module and ffpyplayer to integrate with pyqt5. it is temporarily resolved my issue. the code is given below.
QUESTION
I install new modules via the following command in my miniconda
...ANSWER
Answered 2022-Jan-06 at 20:11Consider creating a separate environment, e.g.,
QUESTION
The specification of the options 'top' and 'bottom' seems to have a strange behavior. The following answered question gave some useful insights, but does not cure everything.
With the code :
...ANSWER
Answered 2022-Jan-01 at 22:59In your example, the line-edit does not literally accept the value 99.55656
. This can be confirmed by calling its hasAcceptableInput method, which returns False
.
The validator is allowing the value to be entered, because doing so produces a valid Intermediate state. According to the docs, this can happen "if it is likely that a little more editing will make the input acceptable". So in the specific case of 99.55656
, deleting a 9
would produce a valid Acceptable state. This would seem to imply that "a little more editing" should be taken to mean adding or removing a single character (where the notation is StandardNotation
).
QUESTION
I have this app where I was trying to close window on right click event, although the event works and my window is closed but the right click is also sent to the app that is present below my python app and therefore a context menu(if present) is opened for that app.
For eg, if I have windows desktop screen below my python app, the context menu of windows will be opened.
This is what I have tried
...ANSWER
Answered 2021-Dec-22 at 05:02On right click of the mouse 2 of the events that gets fired are OnMousePress
and OnMouseRelease
. Most of the desktop apps and the dektop screen as well responds to the OnMouseRelease
event. And since I am closing the window on mousePressEvent
. The window is closed but the release event is sent to the application underneath the window. And hence we are seeing the context menu on the application below our app.
Closing on mouseReleaseEvent
worked for me.
QUESTION
I am using pyvistaqt
and want display a progress bar window when I load data. I have success without using pyvista
with PyQt
(see this SO post), however it isn't working when I add vtk
.
I think something is still blocking the main thread, but I don't know what. Either the progress bar won't show at all, or if it does, half way through the bar stops loading and stops responding. Any help would be much appreciated:
Setup:
...ANSWER
Answered 2021-Dec-17 at 00:12"(Not Responding)" in Windows is usually the consequence of a deadlock. Historically, a lot of confusion has surfaced over whether to override run()
or to use moveToThread()
when dealing with QThread
:
- You're doing it wrong...
- You were not doing so wrong
- QThread documentation: do not discourage the reimplementation of QThread
Though both methods are accepted, I chose to use moveToThread()
because I learned it was best used when you have threads that need to interact with one another through signals and slots (see QThreads: Are You Using Them Wrong?)
After careful consideration, I removed the lambda
from self.thread.started.connect
and replaced it with
QUESTION
Good day
I am getting an error while importing my environment:
...ANSWER
Answered 2021-Dec-03 at 09:22Build tags in you environment.yml are quite strict requirements to satisfy and most often not needed. In your case, changing the yml file to
QUESTION
I tried to install pyqt5-tools with pip but this error occurred:
...ANSWER
Answered 2021-Nov-28 at 10:46Install Python 3.8 from official python website it's on the bottom of the page: https://www.python.org/downloads/release/python-380/
Then install the package with Python 3.8 instead of the version you are currently using like this:
py -3.8 -m pip install pyqt5-tools
This worked for me, and will hopefully work for you too :)
Note that you will need to use python 3.8 for running a code :C
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Install PyQt5-
You can use PyQt5- like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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