How to install Qt in Ubuntu environment

With the rapid development of software engineering, developers are faced with increasingly complex tasks, and it is becoming increasingly important to find ways to simplify the development process. In this context, the open source programming language Golang has begun to become the new favorite of developers. Golang is increasingly used in fields such as web applications and cloud services due to its efficiency, simplicity, and security. Among them, when developing GUI applications, many developers tend to use interface libraries written in Qt because their code is streamlined and easy to manage. Therefore, many Golang developers want to install Golang through Qt to simplify the development process. This article will introduce in detail how to install Qt and use it to develop Golang GUI applications in Ubuntu environment.

Part 1: Install Qt

Qt is a cross-platform GUI library that can greatly simplify GUI development work. In order to install Qt, you need to perform the following steps:

1. Check the dependency packages:

In Ubuntu system, execute the following command to check the required dependency packages:

sudo apt-get install build-essential libfontconfig1 mesa-common-dev libglu1-mesa-dev libxrender-dev libxi-dev

2. Download and install Qt:

In Ubuntu system, you can download and install Qt 5.15.0 version through the following command:

wget https://download.qt.io/archive/qt/5.15/5.15.0/qt-opensource-linux-x64-5.15.0.run
chmod +x qt-opensource-linux-x64-5.15.0.run
sudo ./qt-opensource-linux-x64-5.15.0.run

In the installation process , you need to select the required components, especially in Golang application development, you need to select the installation component of Qt Creator. After the installation is complete, environment variables need to be set. In Ubuntu system, you can edit the ~/.bashrc file and add the following two lines of commands:

export QTDIR=/opt/Qt/5.15.0/gcc_64
export PATH=$QTDIR/bin:$PATH

Save the file and execute the following commands to update the environment variables:

source ~/.bashrc

After completing the above steps, Qt was successfully installed.

Part 2: Writing Golang GUI Applications using Qt

Now, you can write applications using Golang and Qt. The following is a simple sample code:

package main

import (
    "github.com/therecipe/qt/core"
    "github.com/therecipe/qt/gui"
    "github.com/therecipe/qt/widgets"
)

func main() {
    app := widgets.NewQApplication(len(core.QCoreApplication_Args()), core.QCoreApplication_Argv())

    window := widgets.NewQMainWindow(nil, 0)
    window.SetWindowTitle("Hello, Qt for Golang!")
    window.SetMinimumSize2(640, 480)

    label := widgets.NewQLabel2(window, core.Qt__Widget)
    label.SetText("Welcome to the Golang world of Qt!")
    label.SetAlignment(core.Qt__AlignCenter)

    font := gui.NewQFont2("Helvetica", 24, 1, false)
    label.SetFont(font)

    window.SetCentralWidget(label)
    window.Show()

    app.Exec()
}

The above code uses the QtLibrary and QtWidgets component libraries in the Qt installation directory. Use the go mod command to import dependent libraries. The example is as follows:

go mod init demo
go mod tidy

Run the code~

The above is the entire process of writing Golang applications using Qt. Using Qt simplifies the development of graphical interfaces and helps Golang developers quickly build complex GUI applications. I hope readers can learn from this article how to install Qt and use it to develop Golang GUI applications.

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