Sunday, September 21, 2025

Qt console hello world

Qt console hello world

This guide shows how a Qt console hello world looks like.

▣ Open Qt Creator and click on Create Project...
▣ Create Qt Console Application by following the section from @1 to @3. 
▣ In Project Location window provide a project name, i.e., HelloWorldConsole
▣ In Define Build System select CMake
▣ In Translation File, take the default values
▣ In Kit Selection, select the toolchain kit to be used. Below shows only one which is MinGW 64-bit. 
▣ In Project Management, take the default. 
▣ In line 6, I have added an instruction to output Hello World in to the console. Also changed to return 0 to exit the application as event loop is not needed.

▣ Gist source code shown below for convenience
In Qt Creator 17.0.1/Qt 6.9.2, need to add QTextStream
▣ Running it using Qt Creator is well and good but we probably want to run it external to the IDE. To deploy the binary with all the dependencies, open the compiler environment used to build the application. In the case above we have used Qt 6.4.1 (MinGW 11.2.0 64-bit). 
▣ Run the following command (change the paths as necessary)
cd \
md tmp
cd tmp
copy C:\Users\t\Documents\build-HelloWorldConsole-Desktop_Qt_6_4_1_MinGW_64_bit-Debug\HelloWorldConsole.exe
windeployqt HelloWorldConsole.exe
▣ The folder structure should look like this. It also shows a sample out from the application. 


Keywords: CPP, Qt, Hello World
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Wednesday, December 28, 2022

Qt Widget hello world code only

Qt Widget hello world code only

This post shows how to create a Hello World Qt Widget application in pure code, not using the UI Designer.

▣ Create a console application - consult this link for a quick guide.
▣ Change main.cpp like below
▣ Update CMakeList.txt like below
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Sunday, December 25, 2022

Qt Widget hello world

Qt Widget hello world

Qt Widget "Hello World" using the Designer 

▣ Open Qt Creator and click on Create Project...

▣ Create Qt Widgets Application

▣ Set project location and provide a name - HelloWorld

▣ Use CMake for the build system

▣ Use the default when defining the main class

▣ For the translation file, do the default for now

▣ Select the Kit (toolchain) to use - if you have followed this installation instruction then you will only have one option as below

▣ In the Summary, just do the default

▣ The HelloWorld project should show the editor with main.cpp files content.  Double click on mainwindow.ui to open the designer.

▣ In the Controls palette, scroll all the way down and look for Label, then drag and drop into the canvas, see below. Then double click to change the text to Hello World. Change the size to show the entire text.  

▣ Click on the Run button, see below for the location

▣ An application with MainWindow title bar and Hello World text should show up. Congratulations on your first Qt application!

Keywords: Qt Creator, Hello World
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Saturday, December 24, 2022

Installing Qt Creator 9.0.1 on Windows 10

Installing Qt Creator 9.0.1 on Windows 10

This is a quick guide on installing Qt Creator 9.0.1 on Windows 10. As of December 24, 2022, the latest available online installer is qt-unified-windows-x64-4.5.1-online.exe. Binaries can be downloaded from https://www.qt.io/download, I was using Qt for open source use.

What follows are the screen captures to get working installation of Qt Creator (Qt 6.4.1).

Welcome Screen

Accept open source obligations

Welcome to open source Qt setup

Contribute to Qt development

Installation Folder - Custom installation

Select Components - Use default, add "MinGW 11.2.0 64-bit"

License Agreement

Start Menu Shortcuts

Ready to Install

Installing

Finished

Keywords: Qt Creator, CPP
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Installing Qt Creator 4.11.x on Windows 10

This is a quick guide on installing Qt Creator 4.11.x on Windows 10.

* Download the QT Online Installer (as of March 2020 it can be downloaded from here).
* Run qt-unified-windows-x86-3.2.2-online.exe and follow the installation wizard like below
Welcome screen
Create an account or login 
Accept Qt Open Source obligations
Setup Qt
Contribute to Qt Create User Experience Development
Select installation folder
Select Components - Default selection
Select MinGW 7.3.0 32-bit and MinGW 7.3.0 64-bit
Under Developer and Designer Tools - check MinGW 7.3.0 32-bit/64-bit
Accept License Agreement
Start Menu Shortcuts
Ready to Install
Installing Qt
Creating Maintenance Tool
Completing the Qt Wizard
Qt Creator!
Keywords: Qt Creator, MinGW 7.3.x
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