C++学习之路（十七）C++ 用Qt5实现一个工具箱（增加托盘图标并且增加显示和退出菜单）- 示例代码拆分讲解

上篇文章，我们用 Qt5 实现了在小工具箱中添加了《为屏幕颜色提取功能增加一个点击复制的功能》功能。今天我们增加一个比较正式点的功能，就是增加托盘图标并且增加显示和退出菜单（越来越像回事了吧 😁 ）。下面我们就来看看如何来规划开发这样的小功能并且添加到我们的工具箱中吧。

老规矩，先上图

在这里插入图片描述

需求功能概述：

系统托盘图标的创建：
- 使用 QSystemTrayIcon 类创建了一个系统托盘图标。
- 图标加载了指定路径下的图标文件，并设置了工具提示信息。
托盘菜单的实现：
- 创建了一个托盘菜单 (QMenu) 用于托盘图标右键点击时弹出。
- 托盘菜单包括了两个选项：显示面板和退出应用程序。
主窗口的显示与隐藏：
- 实现了 MyMainWindow 类，重写了关闭事件处理函数，在关闭窗口时隐藏窗口而不是退出应用程序。
- 创建了一个 showPanel() 槽函数，在点击托盘菜单的 “显示面板” 选项时显示主窗口并将其置于其他窗口之上。

功能实现细节：

MyMainWindow 类中的 closeEvent 函数重写，用于控制关闭窗口的行为，实现隐藏窗口而非退出程序。
showPanel() 槽函数负责显示主窗口并将其置于其他窗口之上。
创建了两个菜单选项：一个用于显示主窗口，另一个用于退出应用程序。
使用 QAction 将触发事件与特定功能（如显示主窗口、退出程序）连接起来。

这些功能集合起来，使得应用程序在系统托盘中可以通过右键点击托盘图标，显示主窗口或退出应用程序，同时在关闭窗口时隐藏而非退出应用程序。

核心实现代码：

class MyMainWindow : public QWidget {
Q_OBJECT
public:explicit MyMainWindow(QWidget *parent = nullptr) : QWidget(parent) {// ...}protected:// 重写关闭事件处理函数void closeEvent(QCloseEvent *event) override {if (this->isVisible()) {// 隐藏主窗口，而不是退出程序this->hide();event->ignore(); // 忽略关闭事件，防止程序退出}}
public slots:// ...void showPanel() {this->show(); // 显示主窗口this->raise(); // 将窗口置于其他窗口上方}private:// ...
};int main(int argc, char *argv[]) {// ...// 创建托盘图标auto* trayIcon = new QSystemTrayIcon(QIcon(":/res/icon/logo.png"), &mainWindow);trayIcon->setToolTip("My App Tray Icon");// 创建托盘菜单auto* trayMenu = new QMenu(&mainWindow);auto* showPanelAction = new QAction("显示面板", &mainWindow);QObject::connect(showPanelAction, &QAction::triggered, &mainWindow, &MyMainWindow::showPanel);trayMenu->addAction(showPanelAction);auto* quitAction = new QAction("退出", &mainWindow);QObject::connect(quitAction, &QAction::triggered, &a, &QApplication::quit);trayMenu->addAction(quitAction);trayIcon->setContextMenu(trayMenu);trayIcon->show();// ...
}

核心代码逻辑讲解

让我们逐段分解并解释代码的作用以及各函数的使用：

创建 `MyMainWindow` 类

class MyMainWindow : public QWidget {Q_OBJECT
public:explicit MyMainWindow(QWidget *parent = nullptr) : QWidget(parent) {// ...}protected:void closeEvent(QCloseEvent *event) override {if (this->isVisible()) {this->hide();event->ignore();}}public slots:void showPanel() {this->show();this->raise();}private:// ...
};

MyMainWindow 类：自定义主窗口类，继承自 QWidget，重写了关闭事件处理函数 closeEvent()，在窗口关闭时隐藏而非退出应用程序。另外，实现了 showPanel() 槽函数，用于显示主窗口并置于其他窗口之上。

主函数 `main`

int main(int argc, char *argv[]) {QApplication a(argc, argv);// ...auto* trayIcon = new QSystemTrayIcon(QIcon(":/res/icon/logo.png"), &mainWindow);trayIcon->setToolTip("My App Tray Icon");auto* trayMenu = new QMenu(&mainWindow);auto* showPanelAction = new QAction("显示面板", &mainWindow);QObject::connect(showPanelAction, &QAction::triggered, &mainWindow, &MyMainWindow::showPanel);trayMenu->addAction(showPanelAction);auto* quitAction = new QAction("退出", &mainWindow);QObject::connect(quitAction, &QAction::triggered, &a, &QApplication::quit);trayMenu->addAction(quitAction);trayIcon->setContextMenu(trayMenu);trayIcon->show();// ...return a.exec();
}

main 函数：应用程序入口，创建了 QApplication 实例，并初始化了系统托盘图标、托盘菜单和相关动作。
QSystemTrayIcon：创建了一个系统托盘图标对象，并加载了指定图标文件设置了提示信息。
QMenu：创建了一个托盘菜单对象，用于托盘图标右键点击时弹出。
QAction：创建了两个动作选项并分别与槽函数连接。一个是显示面板 (showPanelAction)，另一个是退出应用程序 (quitAction)。
setContextMenu：将托盘菜单设置为系统托盘图标的右键菜单。
show() 和 raise()：显示主窗口并置于其他窗口之上。

这些代码段集合起来，实现了系统托盘图标、菜单和主窗口的显示控制，允许用户通过托盘图标来控制应用程序的行为。

图标资源文件如何添加到项目中?

在Clion中创建的QT5项目，并没有找到所谓的 Qt Creator ，我们可以通过以下办法来使用相对路径引入图片资源。

在 CLion 中创建的 Qt 项目可以使用资源文件（.qrc）来包含图片资源。你可以手动创建 .qrc 文件并将其添加到你的项目中。

以下是一个示例：

在项目的根目录（和 main.cpp 同级）手动创建一个新的文件，命名为 resources.qrc 或其他你喜欢的名字。
编辑 .qrc 文件，添加资源：

<!DOCTYPE RCC>
<RCC version="1.0"><qresource><file>res/icon/logo.png</file></qresource>
</RCC>

确保路径 res/icon/logo.png 是相对于 .qrc 文件的路径，以正确地引用图片资源。

在 CMakeLists.txt 文件中添加 .qrc 文件到你的项目中：

# 将 resources.qrc 添加到项目中
set(QT_RESOURCES resources.qrc)# 编译项目时包含生成的资源文件
add_executable(YourProjectName${QT_RESOURCES}# ...其他文件...
)

确保将 YourProjectName 替换为你实际的项目名称(也有用 ${PROJECT_NAME}来表示的)，并将 resources.qrc 文件包含到 set() 中。

在你的代码中使用资源文件的路径来加载图标：

QSystemTrayIcon* trayIcon = new QSystemTrayIcon(QIcon(":/res/icon/logo.png"), &window);

这样配置后，重新编译你的项目，图标应该能够正确地被加载和显示了。

核心代码讲解完毕，下面是完整版代码，复制到本地跑一跑吧~

#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QVBoxLayout>
#include <QMessageBox>
#include <QDebug>
#include <QListWidget>
#include <QClipboard>
#include <QMimeData>
#include <QTextEdit>
#include <QJsonDocument>
#include <QJsonObject>
#include <QDateTime>
#include <QLabel>
#include <QComboBox>
#include <QLineEdit>
#include <QXmlStreamReader>
#include <QFile>
#include <QFileDialog>
#include <QScreen>
#include <QCursor>
#include <QPoint>
#include <QGuiApplication>
#include <QPixmap>
#include <QHBoxLayout>
#include <QThread>
#include <QMouseEvent>
#include <QTimer>
#include <QSystemTrayIcon>
#include <QMenu>#define myApp (dynamic_cast<QApplication *>(QCoreApplication::instance()))class ClickableLabel : public QLabel {
Q_OBJECTpublic:explicit ClickableLabel(QWidget *parent = nullptr) : QLabel(parent) {}signals:void clicked();protected:void mousePressEvent(QMouseEvent *event) override {if (event->button() == Qt::LeftButton) {emit clicked();}}
};class ColorConverter : public QWidget {
Q_OBJECT
public:explicit ColorConverter(QWidget *parent = nullptr) : QWidget(parent) {// 在构造函数中初始化定时器colorTimer = new QTimer(this);colorTimer->setInterval(100); // 设置定时器间隔为100毫秒connect(colorTimer, &QTimer::timeout, this, &ColorConverter::extractScreenColor);auto *layout = new QVBoxLayout(this);// 创建颜色值转换部分的输入框和按钮colorInput = new QLineEdit(this);layout->addWidget(colorInput);convertButton = new QPushButton("16进制转RGB", this);connect(convertButton, &QPushButton::clicked, this, &ColorConverter::convertToRgbColor);layout->addWidget(convertButton);convertButton = new QPushButton("RGB转16进制", this);connect(convertButton, &QPushButton::clicked, this, &ColorConverter::convertToHexColor);layout->addWidget(convertButton);convertedColorOutput = new QTextEdit(this);convertedColorOutput->setReadOnly(true);layout->addWidget(convertedColorOutput);// 创建屏幕颜色提取器部分的按钮和显示框extractColorButton = new QPushButton("开始提取屏幕颜色", this);connect(extractColorButton, &QPushButton::clicked, this, &ColorConverter::startColorCapture);layout->addWidget(extractColorButton);// 创建用于存放颜色块和颜色输出的网格布局auto *colorBlockLayout = new QGridLayout();// 创建颜色输出screenColorOutput = new ClickableLabel(this);screenColorOutput->setFixedSize(200, 90);screenColorOutput->setAlignment(Qt::AlignCenter);screenColorOutput->setStyleSheet("border: 1px solid #ddd");// 这里是触发点击事件后的复制到剪切板的函数调用connect(screenColorOutput, &ClickableLabel::clicked, this, &ColorConverter::copyColorToClipboard);colorBlockLayout->addWidget(screenColorOutput, 0, 0); // 将颜色输出放在网格布局的左上角// 创建颜色块screenColorBlock = new QLabel(this);screenColorBlock->setFixedSize(30, 30); // 设置颜色块大小screenColorBlock->setStyleSheet("border: 1px solid #ddd");colorBlockLayout->addWidget(screenColorBlock, 0, 0, Qt::AlignTop | Qt::AlignRight); // 将颜色块放在颜色输出的右上角layout->addLayout(colorBlockLayout);setLayout(layout);installEventFilter(this); // 安装事件过滤器以捕获鼠标事件}protected slots:void convertToHexColor() {// 从输入框获取颜色值QString colorText = colorInput->text();// 按逗号分隔RGB文本QStringList rgbValues = colorText.split(',');if (rgbValues.size() == 3) {// 获取R、G和B的值int red = rgbValues[0].toInt();int green = rgbValues[1].toInt();int blue = rgbValues[2].toInt();// 将RGB值转换为16进制字符串QString hexRed = QString("%1").arg(red, 2, 16, QChar('0')).toUpper();QString hexGreen = QString("%1").arg(green, 2, 16, QChar('0')).toUpper();QString hexBlue = QString("%1").arg(blue, 2, 16, QChar('0')).toUpper();// 构建16进制颜色代码文本QString hexText = QString("#%1%2%3").arg(hexRed).arg(hexGreen).arg(hexBlue);convertedColorOutput->setText(hexText);} else {// 处理无效颜色输入的情况convertedColorOutput->setText("Invalid color input");}}void convertToRgbColor() {// 从输入框获取颜色值QString colorText = colorInput->text();QColor color(colorText);if (color.isValid()) {// 获取16进制颜色码的红、绿、蓝通道值int red = color.red();int green = color.green();int blue = color.blue();// 构建RGB颜色代码文本QString outputText = QString("RGB(%1, %2, %3)").arg(red).arg(green).arg(blue);convertedColorOutput->setText(outputText);} else {// 处理无效颜色输入的情况convertedColorOutput->setText("Invalid color input");}}// 开始捕获颜色的槽函数void startColorCapture() {extractColorButton->setText("请开始移动鼠标 按Tab键终止取色");colorTimer->start();}void extractScreenColor() {QPoint cursorPos = QCursor::pos();QScreen *screen = QGuiApplication::screenAt(cursorPos);if (screen) {QPixmap screenshot = screen->grabWindow(0, cursorPos.x(), cursorPos.y(), 1, 1);if (!screenshot.isNull()) {QColor color = screenshot.toImage().pixel(0, 0);QString colorText = QString("#%1").arg(color.name().mid(1));screenColorOutput->setText(colorText);QString styleSheet = QString("background-color: %1; border: 1px solid #ddd;").arg(color.name());screenColorBlock->setStyleSheet(styleSheet);} else {screenColorOutput->setText("Failed to grab screen color");}} else {screenColorOutput->setText("No screen found at the cursor position");}}// 停止捕获颜色的槽函数void stopColorCapture() {colorTimer->stop();extractColorButton->setText("开始提取屏幕颜色");}void copyColorToClipboard() {// 从screenColorOutput获取颜色信息QString colorText = screenColorOutput->text();// 复制颜色值到剪切板QApplication::clipboard()->setText(colorText);// 弹出提示框显示复制的颜色值QMessageBox::information(this, "颜色已复制", QString("已复制颜色：") + colorText);}
protected:// 捕获松开Tab按键事件bool eventFilter(QObject *watched, QEvent *event) override {if (event->type() == QEvent::WindowDeactivate || event->type() == QEvent::KeyRelease) {stopColorCapture();return true;}return QObject::eventFilter(watched, event);}private:QLineEdit *colorInput;QPushButton *convertButton;QTextEdit *convertedColorOutput;QPushButton *extractColorButton;ClickableLabel *screenColorOutput;QLabel *screenColorBlock;QTimer *colorTimer;
};class Base64ImageConverter : public QWidget {
Q_OBJECT
public:explicit Base64ImageConverter(QWidget *parent = nullptr) : QWidget(parent) {auto *layout = new QVBoxLayout(this);selectImageButton = new QPushButton("选择图片", this);connect(selectImageButton, &QPushButton::clicked, this, &Base64ImageConverter::selectImage);layout->addWidget(selectImageButton);imagePathTextEdit = new QTextEdit(this);imagePathTextEdit->setReadOnly(true);layout->addWidget(imagePathTextEdit);convertToBase64Button = new QPushButton("转换为Base64编码", this);connect(convertToBase64Button, &QPushButton::clicked, this, &Base64ImageConverter::convertToBase64);layout->addWidget(convertToBase64Button);base64OutputTextEdit = new QTextEdit(this);base64OutputTextEdit->setAcceptRichText(false);layout->addWidget(base64OutputTextEdit);convertToImagePreviewButton = new QPushButton("Base64编码转图片预览", this);connect(convertToImagePreviewButton, &QPushButton::clicked, this, &Base64ImageConverter::convertToImagePreview);layout->addWidget(convertToImagePreviewButton);imagePreviewLabel = new QLabel(this);imagePreviewLabel->setFixedHeight(200); // 设置图片高度为 200layout->addWidget(imagePreviewLabel);setLayout(layout);}private slots:void selectImage() {// 创建文件对话框用于选择图片文件QString imagePath = QFileDialog::getOpenFileName(this, tr("选择图片"), "", tr("Images (*.png *.jpg *.bmp)"));// 如果用户选择了图片文件，则显示文件路径if (!imagePath.isEmpty()) {imagePathTextEdit->setText(imagePath);selectedImagePath = imagePath;}}void convertToBase64() {if (selectedImagePath.isEmpty()) {QMessageBox::warning(this, "警告", "请先选择图片");return;}// 读取选定图片文件的内容QFile file(selectedImagePath);if (file.open(QIODevice::ReadOnly)) {QByteArray imageData = file.readAll();QString base64Data = imageData.toBase64();base64OutputTextEdit->setText(base64Data);} else {QMessageBox::critical(this, "错误", "无法读取图片文件");}}void convertToImagePreview() {QString base64Data = base64OutputTextEdit->toPlainText().toUtf8();if (base64Data.isEmpty()) {QMessageBox::warning(this, "警告", "请先转换为Base64编码");return;}// 从Base64数据创建QImage并显示在标签中QByteArray byteArray = QByteArray::fromBase64(base64Data.toUtf8());QImage image;image.loadFromData(byteArray);if (!image.isNull()) {// 水平居中对齐imagePreviewLabel->setAlignment(Qt::AlignHCenter);// 缩放图片到 200x200QPixmap pixmap = QPixmap::fromImage(image.scaled(200, 200, Qt::KeepAspectRatio));imagePreviewLabel->setPixmap(pixmap);} else {QMessageBox::critical(this, "错误", "无法加载图片");}}private:QPushButton *selectImageButton;QTextEdit *imagePathTextEdit;QPushButton *convertToBase64Button;QTextEdit *base64OutputTextEdit;QPushButton *convertToImagePreviewButton;QLabel *imagePreviewLabel;QString selectedImagePath;
};class Base64Converter : public QWidget {
Q_OBJECT
public:explicit Base64Converter(QWidget *parent = nullptr) : QWidget(parent) {auto *layout = new QVBoxLayout(this);inputTextEdit = new QTextEdit(this);layout->addWidget(inputTextEdit);encryptButton = new QPushButton("加密", this);connect(encryptButton, &QPushButton::clicked, this, &Base64Converter::encryptText);layout->addWidget(encryptButton);decryptButton = new QPushButton("解密", this);connect(decryptButton, &QPushButton::clicked, this, &Base64Converter::decryptText);layout->addWidget(decryptButton);outputTextEdit = new QTextEdit(this);outputTextEdit->setReadOnly(true);layout->addWidget(outputTextEdit);setLayout(layout);}private slots:void encryptText() {QString inputText = inputTextEdit->toPlainText().toUtf8();QByteArray byteArray = inputText.toUtf8().toBase64();outputTextEdit->setText(byteArray);}void decryptText() {QString inputText = inputTextEdit->toPlainText();QByteArray byteArray = QByteArray::fromBase64(inputText.toUtf8());outputTextEdit->setText(byteArray);}private:QTextEdit *inputTextEdit;QTextEdit *outputTextEdit;QPushButton *encryptButton;QPushButton *decryptButton;
};class XmlFormatter : public QWidget {
Q_OBJECT
public:explicit XmlFormatter(QWidget *parent = nullptr) : QWidget(parent) {auto *layout = new QVBoxLayout(this);inputTextEdit = new QTextEdit(this);layout->addWidget(inputTextEdit);formatButton = new QPushButton("格式化 XML", this);connect(formatButton, &QPushButton::clicked, this, &XmlFormatter::formatXml);layout->addWidget(formatButton);outputTextEdit = new QTextEdit(this);outputTextEdit->setReadOnly(true);layout->addWidget(outputTextEdit);setLayout(layout);}private slots:void formatXml() {// 获取输入的XML文本QString inputText = inputTextEdit->toPlainText();if (!inputText.isEmpty()) {// 使用 QXmlStreamReader 读取输入的 XML 文本QXmlStreamReader reader(inputText);QString formattedXml;int indentLevel = 0;while (!reader.atEnd() && !reader.hasError()) {if (reader.isStartElement()) {formattedXml += getIndent(indentLevel) + "<" + reader.name().toString() + ">\n";++indentLevel;} else if (reader.isEndElement()) {--indentLevel;formattedXml += getIndent(indentLevel) + "</" + reader.name().toString() + ">\n";} else if (reader.isCharacters() && !reader.isWhitespace()) {formattedXml += getIndent(indentLevel) + reader.text().toString() + "\n";}reader.readNext();}if (reader.hasError()) {outputTextEdit->setText("XML 解析错误：" + reader.errorString());} else {outputTextEdit->setText(formattedXml);}} else {// 如果输入为空，则清空输出区域outputTextEdit->clear();}}static QString getIndent(int level) {return QString(level * 4, ' '); // 4空格作为缩进}private:QTextEdit *inputTextEdit;QPushButton *formatButton;QTextEdit *outputTextEdit;
};class NumberBaseConverter : public QWidget {
Q_OBJECT
public:explicit NumberBaseConverter(QWidget *parent = nullptr) : QWidget(parent) {auto *layout = new QVBoxLayout(this);// 横向排列的输入框和选择框auto *horizontalLayout = new QHBoxLayout();// 创建输入框并添加到水平布局inputLineEdit = new QLineEdit(this);horizontalLayout->addWidget(inputLineEdit);// 连接输入框的文本变化信号到槽函数connect(inputLineEdit, &QLineEdit::textChanged, this, &NumberBaseConverter::convertNumber);// 创建下拉选择框并添加到水平布局baseComboBox = new QComboBox(this);baseComboBox->addItem("二进制");baseComboBox->addItem("八进制");baseComboBox->addItem("十进制");baseComboBox->addItem("十六进制");horizontalLayout->addWidget(baseComboBox);// 将水平布局添加到垂直布局layout->addLayout(horizontalLayout);// 创建四个只读的输出框并添加到垂直布局binaryOutput = new QLineEdit(this);binaryOutput->setReadOnly(true);layout->addWidget(binaryOutput);octalOutput = new QLineEdit(this);octalOutput->setReadOnly(true);layout->addWidget(octalOutput);decimalOutput = new QLineEdit(this);decimalOutput->setReadOnly(true);layout->addWidget(decimalOutput);hexOutput = new QLineEdit(this);hexOutput->setReadOnly(true);layout->addWidget(hexOutput);// 连接下拉选择框的选择变化信号到槽函数，并进行初始转换connect(baseComboBox, QOverload<int>::of(&QComboBox::currentIndexChanged), this,&NumberBaseConverter::convertNumber);convertNumber(); // 初始转换setLayout(layout); // 设置整体布局}private slots:void convertNumber() {QString inputText = inputLineEdit->text();bool ok;int base = baseComboBox->currentIndex();if (!inputText.isEmpty()) {// 根据所选进制进行转换if (base == 0) {int number = inputText.toInt(&ok, 2); // 二进制转十进制if (ok) {binaryOutput->setText(inputText);octalOutput->setText(QString::number(number, 8));decimalOutput->setText(QString::number(number));hexOutput->setText(QString::number(number, 16).toUpper());}} else if (base == 1) {// 八进制转换int number = inputText.toInt(&ok, 8);if (ok) {binaryOutput->setText(QString::number(number, 2));octalOutput->setText(inputText);decimalOutput->setText(QString::number(number));hexOutput->setText(QString::number(number, 16).toUpper());}} else if (base == 2) {// 十进制转换int number = inputText.toInt(&ok, 10);if (ok) {binaryOutput->setText(QString::number(number, 2));octalOutput->setText(QString::number(number, 8));decimalOutput->setText(inputText);hexOutput->setText(QString::number(number, 16).toUpper());}} else if (base == 3) {// 十六进制转换int number = inputText.toInt(&ok, 16);if (ok) {binaryOutput->setText(QString::number(number, 2));octalOutput->setText(QString::number(number, 8));decimalOutput->setText(QString::number(number));hexOutput->setText(inputText.toUpper());}}} else {// 如果输入为空，则清空输出binaryOutput->clear();octalOutput->clear();decimalOutput->clear();hexOutput->clear();}}private:QLineEdit *inputLineEdit;QComboBox *baseComboBox;QLineEdit *binaryOutput;QLineEdit *octalOutput;QLineEdit *decimalOutput;QLineEdit *hexOutput;
};class PlaceholderTextEdit : public QWidget {
Q_OBJECT
public:explicit PlaceholderTextEdit(const QString &placeholderText, QWidget *parent = nullptr) : QWidget(parent) {auto *layout = new QVBoxLayout(this);placeholderLabel = new QLabel(placeholderText, this);layout->addWidget(placeholderLabel);textEdit = new QTextEdit(this);layout->addWidget(textEdit);connect(textEdit, &QTextEdit::textChanged, this, &PlaceholderTextEdit::checkPlaceholder);checkPlaceholder(); // 初始检查setLayout(layout);}QString getText() const {return textEdit->toPlainText();}private slots:void checkPlaceholder() {placeholderLabel->setVisible(textEdit->toPlainText().isEmpty());}private:QLabel *placeholderLabel;QTextEdit *textEdit;
};class DateTimeTimestampConverter : public QWidget {
Q_OBJECT
public:explicit DateTimeTimestampConverter(QWidget *parent = nullptr) : QWidget(parent) {auto *layout = new QVBoxLayout(this);inputTextEdit = new PlaceholderTextEdit("在此输入日期时间或时间戳", this);layout->addWidget(inputTextEdit);convertToTimestampButton = new QPushButton("日期时间转时间戳", this);connect(convertToTimestampButton, &QPushButton::clicked, this, &DateTimeTimestampConverter::convertToTimestamp);layout->addWidget(convertToTimestampButton);convertToDateTimeButton = new QPushButton("时间戳转日期时间", this);connect(convertToDateTimeButton, &QPushButton::clicked, this, &DateTimeTimestampConverter::convertToDateTime);layout->addWidget(convertToDateTimeButton);outputTextEdit = new QTextEdit(this);outputTextEdit->setReadOnly(true);layout->addWidget(outputTextEdit);setLayout(layout);}private slots:void convertToTimestamp() {QString inputText = inputTextEdit->getText();QDateTime dateTime = QDateTime::fromString(inputText, "yyyy-MM-dd HH:mm:ss");if (dateTime.isValid()) {qint64 timestamp = dateTime.toSecsSinceEpoch();outputTextEdit->setText(QString::number(timestamp));} else {outputTextEdit->setText("无效的日期时间格式！");}}void convertToDateTime() {QString inputText = inputTextEdit->getText();bool ok;qint64 timestamp = inputText.toLongLong(&ok);if (ok) {QDateTime dateTime;dateTime.setSecsSinceEpoch(timestamp);outputTextEdit->setText("时间戳 " + inputText + " 对应的日期时间是：" + dateTime.toString("yyyy-MM-dd HH:mm:ss"));} else {outputTextEdit->setText("无效的时间戳格式！");}}private:QPushButton *convertToTimestampButton;QPushButton *convertToDateTimeButton;QTextEdit *outputTextEdit;PlaceholderTextEdit *inputTextEdit;
};class JsonFormatter : public QWidget {
Q_OBJECT
public:explicit JsonFormatter(QWidget *parent = nullptr) : QWidget(parent) {auto *layout = new QVBoxLayout(this);inputTextEdit = new QTextEdit(this);layout->addWidget(inputTextEdit);formatButton = new QPushButton("格式化", this);connect(formatButton, &QPushButton::clicked, this, &JsonFormatter::formatJson);layout->addWidget(formatButton);outputTextEdit = new QTextEdit(this);outputTextEdit->setReadOnly(true);layout->addWidget(outputTextEdit);setLayout(layout);}private slots:void formatJson() {QString inputText = inputTextEdit->toPlainText();QJsonParseError error{};QJsonDocument jsonDoc = QJsonDocument::fromJson(inputText.toUtf8(), &error);if (error.error != QJsonParseError::NoError) {outputTextEdit->setText("JSON 解析错误：" + error.errorString());return;}QJsonObject jsonObj = jsonDoc.object();QJsonDocument formattedJson(jsonObj);outputTextEdit->setText(formattedJson.toJson());}private:QTextEdit *inputTextEdit;QPushButton *formatButton;QTextEdit *outputTextEdit;
};class ClipboardManager : public QWidget {
Q_OBJECT
public:explicit ClipboardManager(QWidget *parent = nullptr) : QWidget(parent) {auto *layout = new QVBoxLayout(this);listWidget = new QListWidget(this);updateList(); // 初始更新列表auto *clearButton = new QPushButton("清空记录", this);connect(clearButton, &QPushButton::clicked, this, &ClipboardManager::clearClipboard);layout->addWidget(listWidget);layout->addWidget(clearButton);setLayout(layout);connect(myApp->clipboard(), &QClipboard::dataChanged, this, &ClipboardManager::updateList);}private slots:void updateList() {const QClipboard *clipboard = myApp->clipboard();const QMimeData *mimeData = clipboard->mimeData();if (mimeData->hasText()) {const QString clipboardText = mimeData->text();if (!clipboardText.isEmpty()) {listWidget->addItem(clipboardText);}}}void clearClipboard() {myApp->clipboard()->clear();listWidget->clear();}private:QListWidget *listWidget;
};class MyMainWindow : public QWidget {
Q_OBJECT
public:explicit MyMainWindow(QWidget *parent = nullptr) : QWidget(parent) {setWindowTitle("天河工具箱");auto *layout = new QVBoxLayout(this);auto *clipboardButton = new QPushButton("显示管理粘贴板记录功能");clipboardButton->setObjectName("clipboardButton");connect(clipboardButton, &QPushButton::clicked, this, &MyMainWindow::toggleClipboardManager);clipboardManager = new ClipboardManager(this);clipboardManager->hide();layout->addWidget(clipboardManager);layout->addWidget(clipboardButton);auto *jsonFormatButton = new QPushButton("显示格式化 JSON 功能");jsonFormatButton->setObjectName("jsonFormatButton");connect(jsonFormatButton, &QPushButton::clicked, this, &MyMainWindow::toggleJsonFormatter);jsonFormatter = new JsonFormatter(this);jsonFormatter->hide();layout->addWidget(jsonFormatter);layout->addWidget(jsonFormatButton);auto *timestampConverterButton = new QPushButton("显示时间戳转换功能");timestampConverterButton->setObjectName("timestampConverterButton");connect(timestampConverterButton, &QPushButton::clicked, this, &MyMainWindow::toggleDateTimeTimestampConverter);timestampConverter = new DateTimeTimestampConverter(this);timestampConverter->hide();layout->addWidget(timestampConverter);layout->addWidget(timestampConverterButton);auto *numberBaseConverterButton = new QPushButton("显示进制转换功能");numberBaseConverterButton->setObjectName("numberBaseConverterButton");connect(numberBaseConverterButton, &QPushButton::clicked, this, &MyMainWindow::toggleNumberBaseConverter);numberBaseConverter = new NumberBaseConverter(this);numberBaseConverter->hide();layout->addWidget(numberBaseConverter);layout->addWidget(numberBaseConverterButton);auto *xmlFormatterButton = new QPushButton("显示XML格式化功能");xmlFormatterButton->setObjectName("xmlFormatterButton");connect(xmlFormatterButton, &QPushButton::clicked, this, &MyMainWindow::toggleXmlFormatter);xmlFormatter = new XmlFormatter(this);xmlFormatter->hide();layout->addWidget(xmlFormatter);layout->addWidget(xmlFormatterButton);auto *base64ConverterButton = new QPushButton("显示Base64加解密功能");base64ConverterButton->setObjectName("base64ConverterButton");connect(base64ConverterButton, &QPushButton::clicked, this, &MyMainWindow::toggleBase64Converter);base64Converter = new Base64Converter(this);base64Converter->hide();layout->addWidget(base64Converter);layout->addWidget(base64ConverterButton);auto *base64ImageConverterButton = new QPushButton("显示Base64图片预览功能");base64ImageConverterButton->setObjectName("base64ImageConverterButton");connect(base64ImageConverterButton, &QPushButton::clicked, this, &MyMainWindow::toggleBase64ImageConverter);base64ImageConverter = new Base64ImageConverter(this);base64ImageConverter->hide();layout->addWidget(base64ImageConverter);layout->addWidget(base64ImageConverterButton);auto *colorConverterButton = new QPushButton("显示色值提取转换功能");colorConverterButton->setObjectName("colorConverterButton");connect(colorConverterButton, &QPushButton::clicked, this, &MyMainWindow::toggleColorConverter);colorConverter = new ColorConverter(this);colorConverter->hide();layout->addWidget(colorConverter);layout->addWidget(colorConverterButton);setLayout(layout);}protected:// 重写关闭事件处理函数void closeEvent(QCloseEvent *event) override {if (this->isVisible()) {// 隐藏主窗口，而不是退出程序this->hide();event->ignore(); // 忽略关闭事件，防止程序退出}}
public slots:void toggleClipboardManager() {auto *curButton = findChild<QPushButton *>("clipboardButton");if (clipboardManager->isHidden()) {if (curButton) {curButton->setText("隐藏管理粘贴板记录");}clipboardManager->show();} else {if (curButton) {curButton->setText("显示管理粘贴板记录");}clipboardManager->hide();}}void toggleJsonFormatter() {auto *curButton = findChild<QPushButton *>("jsonFormatButton");if (jsonFormatter->isHidden()) {if (curButton) {curButton->setText("隐藏格式化 JSON");}jsonFormatter->show();} else {if (curButton) {curButton->setText("显示格式化 JSON");}jsonFormatter->hide();}}void toggleDateTimeTimestampConverter() {auto *curButton = findChild<QPushButton *>("timestampConverterButton");if (timestampConverter->isHidden()) {if (curButton) {curButton->setText("隐藏时间戳转换");}timestampConverter->show();} else {if (curButton) {curButton->setText("显示时间戳转换");}timestampConverter->hide();}}void toggleNumberBaseConverter() {auto *curButton = findChild<QPushButton *>("numberBaseConverterButton");if (numberBaseConverter->isHidden()) {if (curButton) {curButton->setText("隐藏进制转换器");}numberBaseConverter->show();} else {if (curButton) {curButton->setText("显示进制转换器");}numberBaseConverter->hide();}}void toggleXmlFormatter() {auto *curButton = findChild<QPushButton *>("xmlFormatterButton");if (xmlFormatter->isHidden()) {if (curButton) {curButton->setText("隐藏XML格式化");}xmlFormatter->show();} else {if (curButton) {curButton->setText("显示XML格式化");}xmlFormatter->hide();}}void toggleBase64Converter() {auto *curButton = findChild<QPushButton *>("base64ConverterButton");if (base64Converter->isHidden()) {if (curButton) {curButton->setText("隐藏Base64加解密功能");}base64Converter->show();} else {if (curButton) {curButton->setText("显示Base64加解密功能");}base64Converter->hide();}}void toggleBase64ImageConverter() {auto *curButton = findChild<QPushButton *>("base64ImageConverterButton");if (base64ImageConverter->isHidden()) {if (curButton) {curButton->setText("隐藏Base64图片预览功能");}base64ImageConverter->show();} else {if (curButton) {curButton->setText("显示Base64图片预览功能");}base64ImageConverter->hide();}}void toggleColorConverter() {auto *curButton = findChild<QPushButton *>("colorConverterButton");if (colorConverter->isHidden()) {if (curButton) {curButton->setText("隐藏色值提取转换功能");}colorConverter->show();} else {if (curButton) {curButton->setText("显示色值提取转换功能");}colorConverter->hide();}}void showPanel() {this->show(); // 显示主窗口this->raise(); // 将窗口置于其他窗口上方}private:ClipboardManager *clipboardManager;JsonFormatter *jsonFormatter;DateTimeTimestampConverter *timestampConverter;NumberBaseConverter *numberBaseConverter;XmlFormatter *xmlFormatter;Base64Converter *base64Converter;Base64ImageConverter *base64ImageConverter;ColorConverter *colorConverter;
};int main(int argc, char *argv[]) {QApplication a(argc, argv);MyMainWindow mainWindow;// 创建托盘图标auto* trayIcon = new QSystemTrayIcon(QIcon(":/res/icon/logo.png"), &mainWindow);trayIcon->setToolTip("My App Tray Icon");// 创建托盘菜单auto* trayMenu = new QMenu(&mainWindow);auto* showPanelAction = new QAction("显示面板", &mainWindow);QObject::connect(showPanelAction, &QAction::triggered, &mainWindow, &MyMainWindow::showPanel);trayMenu->addAction(showPanelAction);auto* quitAction = new QAction("退出", &mainWindow);QObject::connect(quitAction, &QAction::triggered, &a, &QApplication::quit);trayMenu->addAction(quitAction);trayIcon->setContextMenu(trayMenu);trayIcon->show();mainWindow.show();return QApplication::exec();
}#include "main.moc"

资源文件 `resources.qrc`

<!DOCTYPE RCC>
<RCC version="1.0"><qresource><file>res/icon/logo.png</file></qresource>
</RCC>

CMakeLists.txt 文件变更

# 将 resources.qrc 添加到项目中
set(QT_RESOURCES resources.qrc)add_executable(${PROJECT_NAME} ${QT_RESOURCES} main.cpp)

好了，这次的完整代码就这些了，抓紧动手开始吧~ 💪🏻

想要了解这个小工具是如何发展到现在这个地步的话，就看看往期文章吧~，记得要多跑一跑代码。如果大家有什么想要的功能或者想问的问题的话，就在评论区留言吧。Thanks♪(･ω･)ﾉ

往期文章一览

C++学习之路（一）什么是C++？如何循序渐进的学习C++？【纯干货】

C++学习之路（二）C++如何实现一个超简单的学生信息管理系统？C++示例和小项目实例

C++学习之路（三）解析讲解超简单学生信息管理系统代码知识点 - 《根据实例学知识》

C++学习之路（四）C++ 实现简单的待办事项列表命令行应用 - 示例代码拆分讲解

C++学习之路（五）C++ 实现简单的文件管理系统命令行应用 - 示例代码拆分讲解

C++学习之路（六）C++ 实现简单的工具箱系统命令行应用 - 示例代码拆分讲解

C++学习之路（七）C++ 实现简单的Qt界面（消息弹框、按钮点击事件监听）- 示例代码拆分讲解

C++学习之路（八）C++ 用Qt5实现一个工具箱（增加一个粘贴板记录管理功能）- 示例代码拆分讲解

C++学习之路（九）C++ 用Qt5实现一个工具箱（增加一个JSON数据格式化功能）- 示例代码拆分讲解

C++学习之路（十）C++ 用Qt5实现一个工具箱（增加一个时间戳转换功能）- 示例代码拆分讲解

C++学习之路（十一）C++ 用Qt5实现一个工具箱（增加一个进制转换器功能）- 示例代码拆分讲解

C++学习之路（十二）C++ 用Qt5实现一个工具箱（增加一个XML文本格式化功能）- 示例代码拆分讲解

C++学习之路（十三）C++ 用Qt5实现一个工具箱（增加一个Base64加解密功能）- 示例代码拆分讲解

C++学习之路（十四）C++ 用Qt5实现一个工具箱（增加一个Base64图片编码预览功能）- 示例代码拆分讲解

C++学习之路（十五）C++ 用Qt5实现一个工具箱（增加16进制颜色码转换和屏幕颜色提取功能）- 示例代码拆分讲解

C++学习之路（十六）C++ 用Qt5实现一个工具箱（为屏幕颜色提取功能增加一个点击复制的功能）- 示例代码拆分讲解

好了~ 本文就到这里了，感谢您的阅读，每天还有更多的实例学习文章等着你 🎆。别忘了点赞、收藏~ Thanks♪(･ω･)ﾉ 🍇。