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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

news 来源：原创 2024/5/9 5:33:45

上篇文章，我们用 Qt5 实现了在小工具箱中添加了《颜色代码转换和屏幕颜色提取功能》功能。今天我们把屏幕颜色提取的功能再扩展一下，让它可以点击复制吧。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

屏幕颜色提取功能概述：

  1. 屏幕颜色提取功能：

    • 用户点击“开始提取屏幕颜色”按钮后，程序会启动一个定时器。
    • 当定时器触发时，程序会捕获鼠标当前位置的屏幕颜色。
    • 屏幕颜色以十六进制代码和颜色块的形式显示在界面上。
    • 新增：用户可以点击屏幕颜色文本部分，将颜色信息复制到剪贴板。

  2. 事件处理：

    • 使用事件过滤器捕获鼠标事件，以开始和停止屏幕颜色捕获。

核心实现代码：

// 这里就是点击文本区域的单机事件捕捉
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;
};

核心代码逻辑讲解

ClickableLabel 类
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();}}
};

这个类继承自 QLabel，它允许你创建一个可点击的标签。这里有几个关键点：

  • ClickableLabel 类继承自 QLabel，添加了点击信号 clicked。
  • 通过 mousePressEvent 函数捕获鼠标点击事件，当左键点击时触发 clicked 信号。

这个类允许你创建能够发出点击信号的标签，并在其他地方连接这个信号以执行相关操作。

ColorConverter 类
class ColorConverter : public QWidget {
Q_OBJECT
public:explicit ColorConverter(QWidget *parent = nullptr) : QWidget(parent) {// 构造函数中的初始化// 创建控件和布局// ...// 添加按钮、输入框等控件// ...// 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);// 设置布局setLayout(layout);// 事件过滤器installEventFilter(this);}protected slots:// 各种转换和操作槽函数// ...protected:// 各种转换和操作的实现细节// ...// 以及事件过滤器的实现// ...private:// 控件指针// ...// 定时器指针// ...
};

这个类是一个 QWidget 的子类，用于创建一个包含颜色转换和屏幕颜色提取功能的窗口部件。这里的关键点包括：

  • 构造函数中进行了各种控件和布局的初始化和设置。
  • protected slots 区域包含了颜色转换和操作的槽函数。
  • protected 区域包含了这些功能的实现细节，例如将 RGB 转换为十六进制、捕获屏幕颜色等。
  • private 区域包含了指向各种控件和定时器的指针。
事件触发
connect(screenColorOutput, &ClickableLabel::clicked, this, &ColorConverter::copyColorToClipboard);

这行代码的含义是：

  • 当 screenColorOutput（一个 ClickableLabel 实例）发出 clicked 信号时，
  • 会触发 ColorConverter 类中的 copyColorToClipboard 函数。

这行代码将点击 screenColorOutput 标签所触发的信号与 copyColorToClipboard 槽函数连接起来，实现了点击屏幕颜色输出区域后将颜色信息复制到剪贴板的功能。

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>#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);}private 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();}}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;mainWindow.show();return QApplication::exec();
}#include "main.moc"

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

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 🍇。

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