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

	#include <QApplication>
	#include <QLabel>
	int main(int argc, char *argv[])
	{
	QApplication a(argc, argv);
	QLabel* label = new QLabel("Hello world", 0);
	label->resize(300,40);
	label->show();
	return a.exec();
	}

view raw helloworldmain.cpp hosted with ❤ by GitHub

▣ Update CMakeList.txt like below

	cmake_minimum_required(VERSION 3.14)
	project(HelloWorldWidgetCode LANGUAGES CXX)
	set(CMAKE_AUTOUIC ON)
	set(CMAKE_AUTOMOC ON)
	set(CMAKE_AUTORCC ON)
	set(CMAKE_CXX_STANDARD 17)
	set(CMAKE_CXX_STANDARD_REQUIRED ON)
	find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets)
	find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets)
	add_executable(HelloWorldWidgetCode
	main.cpp
	)
	target_link_libraries(HelloWorldWidgetCode Qt${QT_VERSION_MAJOR}::Widgets)
	install(TARGETS HelloWorldWidgetCode
	LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})

view raw CMakeList.txt hosted with ❤ by GitHub