用Qt插件机制在Vs2022编译器上实现简易计算器功能的具体代码

好的，下面是一个简单的示例代码，用于演示如何使用 Qt 插件机制在 Visual Studio 2022 编译器上实现一个简易计算器：

首先是 `CalculatorWidget` 类，用于实现计算器界面和逻辑：

#ifndef CALCULATORWIDGET_H
#define CALCULATORWIDGET_H

#include <QWidget>
#include <QLineEdit>
#include <QPushButton>

class CalculatorWidget : public QWidget
{
    Q_OBJECT

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

private slots:
    void onDigitClicked();
    void onOperatorClicked();
    void onEqualClicked();
    void onClearClicked();

private:
    QLineEdit *m_display;
    QPushButton *m_digitButtons[10];
    QPushButton *m_operatorButtons[4];
    QString m_currentNumber;
    QString m_pendingOperator;
    double m_pendingOperand;
    bool m_waitingForOperand;
};

#endif // CALCULATORWIDGET_H

接下来是 `CalculatorPlugin` 类，用于实现 Qt 插件接口：

#ifndef CALCULATORPLUGIN_H
#define CALCULATORPLUGIN_H

#include <QObject>
#include <QtDesigner/QDesignerCustomWidgetInterface>

class CalculatorPlugin : public QObject, public QDesignerCustomWidgetInterface
{
    Q_OBJECT
    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QDesignerCustomWidgetInterface")
    Q_INTERFACES(QDesignerCustomWidgetInterface)

public:
    explicit CalculatorPlugin(QObject *parent = nullptr);

    QString name() const override;
    QString group() const override;
    QString toolTip() const override;
    QString whatsThis() const override;
    QIcon icon() const override;
    bool isContainer() const override;
    QWidget *createWidget(QWidget *parent) override;
    void initialize(QDesignerFormEditorInterface *formEditor) override;
    bool isInitialized() const override;
    void uninitialize() override;

private:
    bool m_initialized;
};

#endif // CALCULATORPLUGIN_H

最后是 `CalculatorPlugin` 类的实现：

#include "calculatorplugin.h"
#include "calculatorwidget.h"

#include <QtPlugin>

CalculatorPlugin::CalculatorPlugin(QObject *parent)
    : QObject(parent)
{
    m_initialized = false;
}

QString CalculatorPlugin::name() const
{
    return QStringLiteral("CalculatorWidget");
}

QString CalculatorPlugin::group() const
{
    return QStringLiteral("Custom Widgets");
}

QString CalculatorPlugin::toolTip() const
{
    return QStringLiteral("A simple calculator widget");
}

QString CalculatorPlugin::whatsThis() const
{
    return QStringLiteral("A simple calculator widget");
}

QIcon CalculatorPlugin::icon() const
{
    return QIcon();
}

bool CalculatorPlugin::isContainer() const
{
    return false;
}

QWidget *CalculatorPlugin::createWidget(QWidget *parent)
{
    return new CalculatorWidget(parent);
}

void CalculatorPlugin::initialize(QDesignerFormEditorInterface *formEditor)
{
    if (m_initialized)
        return;

    m_initialized = true;
}

bool CalculatorPlugin::isInitialized() const
{
    return m_initialized;
}

void CalculatorPlugin::uninitialize()
{
    if (!m_initialized)
        return;

    m_initialized = false;
}

Q_EXPORT_PLUGIN2(calculatorplugin, CalculatorPlugin)

这些代码只是一个简单的示例，实现了一个基本的计算器功能。如果你需要更详细的代码实现，可以参考 Qt 的官方文档和示例代码。