Python pyqt5 designer windows

Install Qt Designer Standalone
Qt Designer Download for Windows, Mac and Linux

Qt Designer is a cross-platform drag and drop GUI designer, which can be used to build UIs for both PyQt and PySide. It is a great tool to simplify the process of building interfaces for your applications.

While Qt Designer is distributed by Qt as part of the Qt Creator integrated IDE, most of that IDE is not useful or helpful for Python development — primarily being designed for C++ developers. If you just want the Designer application, this is not currently available from Qt. But helpfully, other people have stepped up to make this available.

In this guide we’ll look at the various options available for installing Qt Designer as a standalone application on your system.

Since the Qt Designer software is free software, these alternative distributions of Qt Designer are permitted.

PyQt Command line launcher

Qt Designer is available on PyPi via the pyqt5-tools package. This can be pip installed just like any other Python package. This wrapper will download and install Qt Designer for you and provide a command-line launcher to start the program.

After installation you can run Qt Designer from the command line using the built-in launcher.

If this doesn’t work check your Python scripts folder is in your PATH .

PySide6 Command line launcher

In recent versions of PySide6 Qt Designer is installed automatically when you install PySide6 with pip . After installation you can run Qt Designer from the command line using the built-in launcher.

If this doesn’t work check your Python scripts folder is in your PATH .

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Installing from Qt Package

If the above installation options don’t work for you, you can instead follow the following instructions to install Qt Creator or Qt Designer depending on your platform.

If you install Qt Creator you can access Qt Designer through it, even if you don’t use any of the other functionality.

Windows

Qt Designer is available in the installation packages for Qt available from the Qt downloads page. Download and run the appropriate installer for your system and follow the platform-specific instructions below. Installing Qt Designer will not affect your Python PyQt5/6 or PySide2/6 installation.

Qt Designer is not mentioned in the Windows Qt installer, but is automatically installed when you install any version of the Qt core libraries. For example, in the following screenshot we’ve opted to install the MSVC 2017 64-bit version of Qt — what you choose will have no effect on your Designer install.

Installing Qt, will also install Qt Designer.

If you want to install Qt Creator it is listed under «Developer and Designer Tools». Rather confusingly, Qt Designer isn’t in here.

Installing the Qt Creator component.

macOS

Qt Designer is available in the installation packages for Qt available from the Qt downloads page. Download and run the appropriate installer for your system and follow the platform-specific instructions below. Installing Qt Designer will not affect your Python PyQt5/6 or PySide2/6 installation.

Qt Designer is not mentioned in the macOS Qt installer, but is automatically installed when you install any version of the Qt core libraries. Download the installer from the Qt website — you can opt for the open source version.

Inside the downloaded .dmg file you’ll find the installer.

Open the installer to start the installation. Go through to where it asks you to choose which components to install. Select the macOS package under the latest version of Qt.

You only need the macOS package under the latest version.

Once the installation is complete, open the folder where you installed Qt. The launcher for Designer is under /clang_64/bin . You’ll notice that Qt Creator is also installed in the root of the Qt installation folder.

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Install Qt Designer Standalone was written by Martin Fitzpatrick .

Martin Fitzpatrick has been developing Python/Qt apps for 8 years. Building desktop applications to make data-analysis tools more user-friendly, Python was the obvious choice. Starting with Tk, later moving to wxWidgets and finally adopting PyQt.

Install Qt Designer Standalone was published in installation on May 21, 2022 (updated April 08, 2023 )

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pyqt5-tools 5.15.9.3.3

The PyQt5 wheels do not provide tools such as Qt Designer that were included in the old binary installers. This package aims to provide those in a separate package which is useful for developers while the official PyQt5 wheels stay focused on fulfilling the dependencies of PyQt5 applications.

Both Windows and Linux are supported. Adjust paths etc accordingly if applying the explanations below in Linux rather than Windows. macOS support is incomplete but see issue #12 if you want to discuss it.

Installation

You will generally install pyqt5-tools using pip install . In most cases you should be using virtualenv or venv to create isolated environments to install your dependencies in. The above command assumes an env in the directory yourenv . The ~=5.15 specifies a release compatible with 5.15 which will be the latest version of pyqt5-tools built for PyQt5 5.15. If you are using a different PyQt5 version, specify it instead of 5.15. PyPI keeps a list of all available versions.

As of pyqt5-tools v3 the package has been broken down into four pieces. The wrappers remain here but the plugins are located in pyqt5-plugins, some Qt application helpers in qt5-tools, and the applications are in qt5-applications.

Usage

A program is provided available as Scripts/pyqt5-tools.exe . There are subcommands provided for each of Designer, QML Scene, and the QML Test Runner. These wrapper commands provide additional functionality related to launching the underlying programs. A larger set of Qt application are available as subcommands of the Scripts/qt5-tools.exe program. In both cases, passing —help will list the available subcommands.

Additionally, each pyqt5-tools subcommand listed below includes a parameter to run a basic example which can be used to see if the plugins are working. These examples are not intended to be used as examples of good code.

Each subcommand searches up the filesystem tree from your current working directory to find a .env file and loads it if found. If found, the environment variable DOT_ENV_DIRECTORY will be set to the directory containing the .env file. With this extra variable you can specify paths relative to the .env location.

Designer

There is a Scripts/pyqt5-tools.exe designer.exe entry point that will help fill out PYQTDESIGNERPATH from either command line arguments or a .env file. Unknown arguments are passed through to the original Qt Designer program.

Usage: pyqt5-tools designer [OPTIONS] Options: -p, --widget-path DIRECTORY Paths to be combined with PYQTDESIGNERPATH --example-widget-path Include the path for the pyqt5-tools example button (c:\users\sda\testenv\lib\site- packages\pyqt5_plugins) --designer-help Pass through to get Designer's --help --test-exception-dialog Raise an exception to check the exception dialog functionality. --qt-debug-plugins / --no-qt-debug-plugins Set QT_DEBUG_PLUGINS=1 --help Show this message and exit.

If you want to view the generated code from within Designer, you can run Scripts/pyqt5-tools.exe installuic and it will copy pyuic6.exe such that Designer will use it and show you generated Python code. Note that this will enable viewing using the C++ menu item while the Python menu item will be broken. Without having made this adjustment, the C++ option shows C++ code while the Python option shows PySide2 code. pyqt5 must already be installed or this script will be unable to find the original pyuic6.exe to copy.

In addition to the standard features of the official Designer plugin, this provides an exception dialog for your widget’s Python code. Otherwise Designer in Windows silently crashes on Python exceptions.

QML Plugin

The QML plugin is also included. In the future a tool may be provided to handle copying of the plugin to each directory where it is needed. For now this must be done manually.

QML Scene

Usage: pyqt5-tools qmlscene [OPTIONS] Options: -p, --qml2-import-path DIRECTORY Paths to be combined with QML2_IMPORT_PATH --qmlscene-help Pass through to get QML scene's --help --qt-debug-plugins / --no-qt-debug-plugins Set QT_DEBUG_PLUGINS=1 --run-qml-example Run the pyqt5-tools QML example --help Show this message and exit.

QML Test Runner

Usage: pyqt5-tools qmltestrunner [OPTIONS] Options: -p, --qml2-import-path DIRECTORY Paths to be combined with QML2_IMPORT_PATH --qmltestrunner-help Pass through to get QML test runner's --help --qt-debug-plugins / --no-qt-debug-plugins Set QT_DEBUG_PLUGINS=1 --test-qml-example Test the pyqt5-tools QML example --help Show this message and exit.

Special Thanks

Thanks to MacStadium for providing me with a macOS system to develop and test out the final pyqt5-tools platform. This is still ‘in work’. See issue #12.

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