pyqt5信号槽机制应用

使用clion工具编写cpp qt demo程序

qt install (windows 平台)

• website

https://doc.qt.io/qt-5/windows.html

• mirror config

https://mirrors.tuna.tsinghua.edu.cn/qt/official_releases/online_installers/

use tools install all components

配置文件

CmakeList.txt

cmake_minimum_required(VERSION 3.26)
project(untitled2)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOUIC ON)

set(CMAKE_PREFIX_PATH "C:/Qt/6.7.2/mingw_64/lib/cmake")

find_package(Qt6 COMPONENTS
        Core
        Gui
        Widgets
        REQUIRED)

add_executable(untitled2 main.cpp)
target_link_libraries(untitled2
        Qt::Core
)

if (WIN32 AND NOT DEFINED CMAKE_TOOLCHAIN_FILE)
    set(DEBUG_SUFFIX)
    if (MSVC AND CMAKE_BUILD_TYPE MATCHES "Debug")
        set(DEBUG_SUFFIX "d")
    endif ()
    set(QT_INSTALL_PATH "${CMAKE_PREFIX_PATH}")
    if (NOT EXISTS "${QT_INSTALL_PATH}/bin")
        set(QT_INSTALL_PATH "${QT_INSTALL_PATH}/..")
        if (NOT EXISTS "${QT_INSTALL_PATH}/bin")
            set(QT_INSTALL_PATH "${QT_INSTALL_PATH}/..")
        endif ()
    endif ()
    if (EXISTS "${QT_INSTALL_PATH}/plugins/platforms/qwindows${DEBUG_SUFFIX}.dll")
        add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
                COMMAND ${CMAKE_COMMAND} -E make_directory
                "$<TARGET_FILE_DIR:${PROJECT_NAME}>/plugins/platforms/")
        add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
                COMMAND ${CMAKE_COMMAND} -E copy
                "${QT_INSTALL_PATH}/plugins/platforms/qwindows${DEBUG_SUFFIX}.dll"
                "$<TARGET_FILE_DIR:${PROJECT_NAME}>/plugins/platforms/")
    endif ()
    foreach (QT_LIB Core)
        add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
                COMMAND ${CMAKE_COMMAND} -E copy
                "${QT_INSTALL_PATH}/bin/Qt6${QT_LIB}${DEBUG_SUFFIX}.dll"
                "$<TARGET_FILE_DIR:${PROJECT_NAME}>")
    endforeach (QT_LIB)
endif ()

cpp code

#include <QCoreApplication>
#include <QDebug>

int main(int argc, char *argv[]) {
    QCoreApplication a(argc, argv);
    qDebug() << "Hello World";

    return QCoreApplication::exec();
}

If exists problem, add follow environment to path

C:\Qt\6.7.2\mingw_64
C:\Qt\Tools\QtCreator\bin

other demo

clion create cpp qt demo

follow pic

• 通过uic创建ui_file.h头文件, 配置如图
  

qt ui cpp demo

• cpp ui(main_ui.cpp)

  //
  // Created by Administrator on 2024/8/16 0016.
  //
  
  // You may need to build the project (run Qt uic code generator) to get "ui_main_ui.h" resolved
  
  #include "main_ui.h"
  #include "ui_main_ui.h"
  
  
  main_ui::main_ui(QWidget *parent) :
          QMainWindow(parent), ui(new Ui::main_ui) {
      ui->setupUi(this);
  }
  
  main_ui::~main_ui() {
      delete ui;
  }

• main_ui.h

//
// Created by Administrator on 2024/8/16 0016.
//

#ifndef CPP_SOCKET_SERVE_MAIN_UI_H
#define CPP_SOCKET_SERVE_MAIN_UI_H

#include <QMainWindow>


QT_BEGIN_NAMESPACE
namespace Ui { class main_ui; }
QT_END_NAMESPACE

class main_ui : public QMainWindow {
//Q_OBJECT 如果注释会报错

public:
    explicit main_ui(QWidget *parent = nullptr);

    ~main_ui() override;

private:
    Ui::main_ui *ui;
};


#endif //CPP_SOCKET_SERVE_MAIN_UI_H

• main_ui.ui (qt ui)

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
    <author/>
    <comment/>
    <exportmacro/>
    <class>main_ui</class>
    <widget class="QMainWindow" name="main_ui">
        <property name="geometry">
            <rect>
                <x>0</x>
                <y>0</y>
                <width>400</width>
                <height>300</height>
            </rect>
        </property>
        <property name="windowTitle">
            <string>main_ui</string>
        </property>
        <widget class="QWidget" name="centralwidget"/>
        <widget class="QMenuBar" name="menubar">
            <property name="geometry">
                <rect>
                    <x>0</x>
                    <y>0</y>
                    <width>400</width>
                    <height>17</height>
                </rect>
            </property>
        </widget>
        <widget class="QStatusBar" name="statusbar"/>
    </widget>
    <pixmapfunction/>
    <connections/>
</ui>

• uic generate code (ui_main_ui.h)

/********************************************************************************
** Form generated from reading UI file 'main_ui.ui'
**
** Created by: Qt User Interface Compiler version 6.7.2
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef UI_MAIN_UI_H
#define UI_MAIN_UI_H

#include <QtCore/QVariant>
#include <QtWidgets/QApplication>
#include <QtWidgets/QMainWindow>
#include <QtWidgets/QMenuBar>
#include <QtWidgets/QStatusBar>
#include <QtWidgets/QWidget>

QT_BEGIN_NAMESPACE

class Ui_main_ui
{
public:
    QWidget *centralwidget;
    QMenuBar *menubar;
    QStatusBar *statusbar;

    void setupUi(QMainWindow *main_ui)
    {
        if (main_ui->objectName().isEmpty())
            main_ui->setObjectName("main_ui");
        main_ui->resize(400, 300);
        centralwidget = new QWidget(main_ui);
        centralwidget->setObjectName("centralwidget");
        main_ui->setCentralWidget(centralwidget);
        menubar = new QMenuBar(main_ui);
        menubar->setObjectName("menubar");
        menubar->setGeometry(QRect(0, 0, 400, 17));
        main_ui->setMenuBar(menubar);
        statusbar = new QStatusBar(main_ui);
        statusbar->setObjectName("statusbar");
        main_ui->setStatusBar(statusbar);

        retranslateUi(main_ui);

        QMetaObject::connectSlotsByName(main_ui);
    } // setupUi

    void retranslateUi(QMainWindow *main_ui)
    {
        main_ui->setWindowTitle(QCoreApplication::translate("main_ui", "main_ui", nullptr));
    } // retranslateUi

};

namespace Ui {
    class main_ui: public Ui_main_ui {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_MAIN_UI_H