还是主题混合程序设计

以下是针对您现有代码的完整主题化改造方案，实现跨QML/Qt Widgets的阴影主题系统：

一、主题管理系统核心

// thememanager.h
#pragma once
#include <QObject>
#include <QColor>
#include <QMap>
#include <QQmlEngine>class ThemeManager : public QObject
{Q_OBJECTQML_ELEMENTQML_SINGLETONQ_PROPERTY(QColor shadowColor READ shadowColor NOTIFY themeChanged)Q_PROPERTY(qreal shadowRadius READ shadowRadius NOTIFY themeChanged)Q_PROPERTY(QPoint shadowOffset READ shadowOffset NOTIFY themeChanged)public:enum Theme { DarkTheme, LightTheme };Q_ENUM(Theme)static ThemeManager* instance();static ThemeManager* create(QQmlEngine*, QJSEngine*) { return instance(); }Q_INVOKABLE void applyTheme(Theme theme);// 阴影属性QColor shadowColor() const;qreal shadowRadius() const;QPoint shadowOffset() const;signals:void themeChanged();private:explicit ThemeManager(QObject *parent = nullptr);void loadThemeConfig(Theme theme);QColor m_shadowColor;qreal m_shadowRadius;QPoint m_shadowOffset;static ThemeManager* m_instance;
};

// thememanager.cpp
#include "thememanager.h"
#include <QFile>
#include <QJsonDocument>
#include <QJsonObject>ThemeManager* ThemeManager::m_instance = nullptr;ThemeManager* ThemeManager::instance()
{if (!m_instance)m_instance = new ThemeManager();return m_instance;
}ThemeManager::ThemeManager(QObject *parent) : QObject(parent)
{applyTheme(DarkTheme);
}void ThemeManager::applyTheme(Theme theme)
{loadThemeConfig(theme);emit themeChanged();
}void ThemeManager::loadThemeConfig(Theme theme)
{QString themeFile = theme == DarkTheme ? ":/themes/dark.json" : ":/themes/light.json";QFile file(themeFile);if (file.open(QIODevice::ReadOnly)) {QJsonDocument doc = QJsonDocument::fromJson(file.readAll());QJsonObject config = doc.object();QJsonObject shadowConfig = config["shadow"].toObject();m_shadowColor = QColor(shadowConfig["color"].toString());m_shadowRadius = shadowConfig["radius"].toDouble();QJsonArray offset = shadowConfig["offset"].toArray();m_shadowOffset = QPoint(offset[0].toInt(), offset[1].toInt());}
}QColor ThemeManager::shadowColor() const { return m_shadowColor; }
qreal ThemeManager::shadowRadius() const { return m_shadowRadius; }
QPoint ThemeManager::shadowOffset() const { return m_shadowOffset; }

二、可主题化阴影控件

// themedshadowwidget.h
#pragma once
#include <QWidget>
#include <QGraphicsDropShadowEffect>class ThemedShadowWidget : public QWidget
{Q_OBJECT
public:explicit ThemedShadowWidget(QWidget *parent = nullptr);protected:void updateShadowEffect();private slots:void handleThemeChanged();private:QGraphicsDropShadowEffect* m_shadowEffect;
};

// themedshadowwidget.cpp
#include "themedshadowwidget.h"
#include "thememanager.h"ThemedShadowWidget::ThemedShadowWidget(QWidget *parent): QWidget(parent),m_shadowEffect(new QGraphicsDropShadowEffect(this))
{setGraphicsEffect(m_shadowEffect);connect(ThemeManager::instance(), &ThemeManager::themeChanged,this, &ThemedShadowWidget::handleThemeChanged);updateShadowEffect();
}void ThemedShadowWidget::updateShadowEffect()
{m_shadowEffect->setColor(ThemeManager::instance()->shadowColor());m_shadowEffect->setBlurRadius(ThemeManager::instance()->shadowRadius());m_shadowEffect->setOffset(ThemeManager::instance()->shadowOffset());
}void ThemedShadowWidget::handleThemeChanged()
{updateShadowEffect();
}

三、Qt Designer集成步骤

提升现有控件：
- 在Qt Designer中右键点击base_navigationbar控件
- 选择"Promote to…"
- 设置信息：
  - Base class name: QWidget
  - Promoted class name: ThemedShadowWidget
  - Header file: themedshadowwidget.h
- 点击"Add"后选择"Promote"
重复上述步骤为styleBar和graphWorkplace控件

四、修改ResultGraph类

// resultgraph.cpp（修改后）
ResultGraph::ResultGraph(QWidget *parent) : QWidget(parent), ui(new Ui::ResultGraphScreen)
{ui->setupUi(this);// 移除原有的阴影设置代码，改为自动应用主题效果// 初始化主题ThemeManager::instance()->applyTheme(ThemeManager::DarkTheme);// 其他初始化保持不变...prograssBar_V_OP  = new overallValuesPrograssBar(this);// ...保持原有图表初始化代码
}

五、QML集成组件

// ThemedShadowRect.qml
import QtQuick 2.15
import QtGraphicalEffects 1.15Rectangle {id: rootproperty alias shadowEnabled: shadow.visibleproperty alias shadowColor: shadow.colorproperty alias shadowRadius: shadow.radiusproperty alias shadowOffset: shadow.offsetlayer.enabled: truelayer.effect: DropShadow {id: shadowcolor: ThemeManager.shadowColorradius: ThemeManager.shadowRadiushorizontalOffset: ThemeManager.shadowOffset.xverticalOffset: ThemeManager.shadowOffset.ysamples: 16}
}

六、主题配置文件

// themes/dark.json
{"shadow": {"color": "#2B2B2B","radius": 30,"offset": [0, 5]}
}// themes/light.json
{"shadow": {"color": "#969696","radius": 20,"offset": [3, 3]}
}

七、资源文件配置

// application.qrc
<RCC><qresource prefix="/"><file>themes/dark.json</file><file>themes/light.json</file></qresource>
</RCC>

八、混合编程集成

// main.cpp
#include <QApplication>
#include <QQmlApplicationEngine>
#include "thememanager.h"int main(int argc, char *argv[])
{QApplication app(argc, argv);// 注册QML类型qmlRegisterSingletonInstance("App.Theme", 1, 0, "ThemeManager", ThemeManager::instance());// 加载QMLQQmlApplicationEngine engine;engine.load(QUrl("qrc:/main.qml"));// 显示Widgets窗口MainWindow w;w.show();return app.exec();
}

九、主题切换控制示例

// ThemeSwitch.qml
import QtQuick 2.15
import QtQuick.Controls 2.15
import App.Theme 1.0Row {spacing: 10Button {text: "Dark"onClicked: ThemeManager.applyTheme(ThemeManager.DarkTheme)}Button {text: "Light"onClicked: ThemeManager.applyTheme(ThemeManager.LightTheme)}
}

十、性能优化增强

// 阴影效果对象池
class ShadowEffectPool {
public:static QGraphicsDropShadowEffect* getEffect() {static QMap<QString, QGraphicsDropShadowEffect*> pool;QString key = QString("%1-%2-%3x%4").arg(ThemeManager::instance()->shadowColor().name()).arg(ThemeManager::instance()->shadowRadius()).arg(ThemeManager::instance()->shadowOffset().x()).arg(ThemeManager::instance()->shadowOffset().y());if (!pool.contains(key)) {QGraphicsDropShadowEffect* effect = new QGraphicsDropShadowEffect;effect->setColor(ThemeManager::instance()->shadowColor());effect->setBlurRadius(ThemeManager::instance()->shadowRadius());effect->setOffset(ThemeManager::instance()->shadowOffset());pool.insert(key, effect);}return pool.value(key);}
};// 修改ThemedShadowWidget
void ThemedShadowWidget::updateShadowEffect()
{setGraphicsEffect(ShadowEffectPool::getEffect());
}