实现编辑区中能够缩放按钮和指示灯的功能

customgraphics.cpp

@@ -53,6 +53,16 @@ void HmiComponent::paint(QPainter *painter, const QStyleOptionGraphicsItem *opti
         painter->setPen(QPen(Qt::darkRed, 2, Qt::DashLine));
         painter->drawRect(boundingRect());
     }
+
+    // 如果被选中，绘制缩放控制点
+    if (isSelected()) {
+        QRectF rect = boundingRect();
+
+        // 绘制右下角缩放控制点
+        painter->setBrush(Qt::white);
+        painter->setPen(QPen(Qt::black, 1));
+        painter->drawRect(rect.right() - 8, rect.bottom() - 8, 8, 8);
+    }
 }
 
 void HmiComponent::setAddress(int address)
@@ -68,9 +78,31 @@ int HmiComponent::address() const
     return m_address;
 }
 
+void HmiComponent::setSize(double width, double height)
+{
+    prepareGeometryChange();
+    m_width = width;
+    m_height = height;
+    update();
+}
+
 void HmiComponent::mousePressEvent(QGraphicsSceneMouseEvent *event)
 {
-    // 右键不触发选中信号，留给 contextMenuEvent 处理
+    // 检查是否点击了缩放控制点
+    if (event->button() == Qt::LeftButton && isSelected()) {
+        QRectF rect = boundingRect();
+        QRectF handleRect(rect.right() - 8, rect.bottom() - 8, 8, 8);
+
+        if (handleRect.contains(event->pos())) {
+            m_resizing = true;
+            m_resizeStartPos = event->scenePos();
+            m_resizeStartSize = QSizeF(rect.width(), rect.height());
+            event->accept();
+            return;
+        }
+    }
+
+    // 原有的选中处理
     if (event->button() == Qt::LeftButton) {
         emit selected(this);
     }
@@ -229,6 +261,24 @@ void HmiComponent::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
 
 void HmiComponent::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 {
+    if (m_resizing) {
+        // 计算尺寸变化
+        QPointF delta = event->scenePos() - m_resizeStartPos;
+        double newWidth = qMax(20.0, m_resizeStartSize.width() + delta.x());
+        double newHeight = qMax(20.0, m_resizeStartSize.height() + delta.y());
+
+        // 更新组件大小
+        prepareGeometryChange();
+
+        // 子类需要实现setSize函数
+        setSize(newWidth, newHeight);
+
+        // 更新缩放控制点位置
+        update();
+        event->accept();
+        return;
+    }
+
     if (!(flags() & QGraphicsItem::ItemIsMovable)) {
         // 如果项不可移动，直接调用基类处理
         QGraphicsObject::mouseMoveEvent(event);
@@ -263,8 +313,8 @@ void HmiComponent::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
     QRectF newBounds = bounds.translated(newPos);
 
     // 限制组件边界必须完全在视图可见区域内
-    qreal limitedX = newPos.x();
-    qreal limitedY = newPos.y();
+    double limitedX = newPos.x();
+    double limitedY = newPos.y();
 
     if (newBounds.left() < visibleSceneRect.left())
         limitedX += visibleSceneRect.left() - newBounds.left();
@@ -279,6 +329,30 @@ void HmiComponent::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
     event->accept();
 }
 
+void HmiComponent::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (m_resizing && event->button() == Qt::LeftButton) {
+        m_resizing = false;
+        event->accept();
+        return;
+    }
+    QGraphicsObject::mouseReleaseEvent(event);
+}
+
+void HmiComponent::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
+{
+    QRectF rect = boundingRect();
+    QRectF handleRect(rect.right() - 8, rect.bottom() - 8, 8, 8);
+
+    if (isSelected() && handleRect.contains(event->pos())) {
+        setCursor(Qt::SizeFDiagCursor);
+        m_resizeHandle = BottomRight;
+    } else {
+        setCursor(Qt::ArrowCursor);
+        m_resizeHandle = None;
+    }
+    QGraphicsObject::hoverMoveEvent(event);
+}
 
 void HmiComponent::setOnColor(const QColor& color) {
     m_onColor = color;
@@ -300,6 +374,9 @@ QColor HmiComponent::offColor() const {
 
 HmiButton::HmiButton(QGraphicsItem *parent) : HmiComponent(parent), m_isOn(false)
 {
+    // 按钮保持矩形形状
+    m_width = 65.0;
+    m_height = 30.0;
     m_color = Qt::gray;
     m_offColor = m_color;     // OFF状态颜色设为默认颜色
     m_onColor = Qt::green;    // ON状态颜色为绿色
@@ -307,6 +384,11 @@ HmiButton::HmiButton(QGraphicsItem *parent) : HmiComponent(parent), m_isOn(false
     setColor(m_offColor);     // 当前显示OFF颜色
 }
 
+void HmiButton::setSize(double width, double height)
+{
+    HmiComponent::setSize(width, height);
+}
+
 bool HmiButton::isOn() const
 {
     return m_isOn;
@@ -326,7 +408,7 @@ void HmiButton::setOn(bool on)
 
 QRectF HmiButton::boundingRect() const
 {
-    return QRectF(0, 0, 65, 30);
+    return QRectF(0, 0, m_width, m_height);
 }
 
 void HmiButton::paintShape(QPainter *painter)
@@ -338,6 +420,9 @@ void HmiButton::paintShape(QPainter *painter)
 
 HmiIndicator::HmiIndicator(QGraphicsItem *parent) : HmiComponent(parent)
 {
+    // 指示灯初始为圆形
+    m_width = 30.0;
+    m_height = 30.0;
     m_color = Qt::red;
     m_offColor = m_color;     // OFF状态颜色设为默认颜色
     m_onColor = Qt::green;    // ON状态颜色为绿色
@@ -345,11 +430,17 @@ HmiIndicator::HmiIndicator(QGraphicsItem *parent) : HmiComponent(parent)
     setColor(m_offColor);     // 当前显示OFF颜色
 }
 
+void HmiIndicator::setSize(double width, double height)
+{
+    HmiComponent::setSize(width, height);
+}
+
 QRectF HmiIndicator::boundingRect() const
 {
-    return QRectF(0, 0, 30, 30);
+    return QRectF(0, 0, m_width, m_height);
 }
 
+
 void HmiIndicator::paintShape(QPainter *painter)
 {
     painter->setPen(Qt::NoPen);

customgraphics.h

@@ -7,8 +7,10 @@
 class QPainter;
 class QGraphicsSceneMouseEvent;
 class QGraphicsSceneContextMenuEvent;
+class QGraphicsSceneHoverEvent;
 
-enum class ComponentType {
+enum class ComponentType
+{
     Button,
     Indicator
 };
@@ -51,11 +53,16 @@ public:
     void setAddress(int address);
     int address() const;
 
+    void setSize(double width, double height);
+    QSizeF size() const { return QSizeF(m_width, m_height); }
+
 protected:
     void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
     void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) override;
     virtual void paintShape(QPainter* painter) = 0;
     void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+    void hoverMoveEvent(QGraphicsSceneHoverEvent *event) override;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
 
 protected:
     QColor m_color;             // 当前显示颜色（编辑器中为 OFF）
@@ -63,6 +70,16 @@ protected:
     QColor m_offColor;
     QString m_componentName;
     int m_address = 0;
+
+    // 新增尺寸成员
+    double m_width = 65.0;
+    double m_height = 30.0;
+
+    enum ResizeHandle { None, BottomRight }; // 缩放控制点位置
+    ResizeHandle m_resizeHandle = None;
+    bool m_resizing = false;
+    QPointF m_resizeStartPos;
+    QSizeF m_resizeStartSize;
 };
 
 
@@ -73,6 +90,7 @@ class HmiButton : public HmiComponent
 public:
     HmiButton(QGraphicsItem *parent = nullptr);
     QRectF boundingRect() const override;
+    void setSize(double width, double height);
 
     // 新增状态标志，true = ON，false = OFF
     bool isOn() const;
@@ -91,6 +109,7 @@ class HmiIndicator : public HmiComponent
 public:
     HmiIndicator(QGraphicsItem *parent = nullptr);
     QRectF boundingRect() const override;
+    void setSize(double width, double height);
 
 protected:
     void paintShape(QPainter *painter) override;

hmimodule.cpp

@@ -113,6 +113,10 @@ bool HMIModule::saveToFile(const QString& filePath)
             compObj["address"] = component->address();
             // 添加按钮状态
             compObj["isOn"] = false;  // 默认false
+
+            // 保存尺寸
+            compObj["width"] = component->boundingRect().width();
+            compObj["height"] = component->boundingRect().height();
             if (auto btn = dynamic_cast<HmiButton*>(component)) {
                 compObj["isOn"] = btn->isOn();
             }
@@ -255,7 +259,13 @@ bool HMIModule::openFromFile(const QString& filePath)
                 continue;
             }
 
+            // 加载尺寸
+            double width = compObj["width"].toDouble(65); // 默认值
+            double height = compObj["height"].toDouble(30); // 默认值
+
             if (newItem) {
+                // 设置尺寸
+                newItem->setSize(width, height);
                 newItem->setPos(QPointF(x, y));
                 QColor color(colorName);
                 if (color.isValid()) {
@@ -452,11 +462,14 @@ void HMIModule::onCopyRequested()
     }
     m_copiedColor = itemToCopy->color();
 
-    // 新增复制以下属性
+    // 复制以下属性
     m_copiedOnColor = itemToCopy->onColor();
     m_copiedOffColor = itemToCopy->offColor();
     m_copiedComponentName = itemToCopy->componentName();
     m_copiedAddress = itemToCopy->address();
+    // 复制尺寸
+    m_copiedWidth = itemToCopy->size().width();
+    m_copiedHeight = itemToCopy->size().height();
 
     m_hasCopiedItem = true;
 
@@ -488,6 +501,8 @@ void HMIModule::onPasteRequested(const QPointF& scenePos)
         newItem->setOffColor(m_copiedOffColor);
         newItem->setComponentName(m_copiedComponentName);
         newItem->setAddress(m_copiedAddress);
+        // 设置尺寸
+        newItem->setSize(m_copiedWidth, m_copiedHeight);
         newItem->setPos(scenePos);
         currentScene->addItem(newItem); // 使用当前页面的 scene
         setupNewComponent(newItem);

hmimodule.h

@@ -57,6 +57,9 @@ private:
     QColor m_copiedOffColor;
     QString m_copiedComponentName;
     int m_copiedAddress = 0;
+    // 新增复制尺寸变量
+    double m_copiedWidth = 0.0;
+    double m_copiedHeight = 0.0;
 
     bool m_hasCopiedItem = false;       // 指示当前是否已经有组件被复制
     int m_pageCount = 1;                // 初始化页面计数器

mainwindow.cpp

@@ -19,26 +19,10 @@ MainWindow::MainWindow(QWidget *parent)
     // 连接 HMIModule 的信号到 MainWindow 的槽
     connect(hmi_, &HMIModule::logMessageGenerated, this, &MainWindow::appendLog);
 
-    // 新建菜单
-    connect(ui_->action, &QAction::triggered, this, &MainWindow::onNewFile);
-
-    connect(ui_->action_3, &QAction::triggered, this, [this]() {
-        QString fileName = QFileDialog::getSaveFileName(this, "保存HMI文件", "", "JSON文件 (*.hmi)");
-        if (!fileName.isEmpty()) {
-            if (!hmi_->saveToFile(fileName)) {
-                QMessageBox::warning(this, "保存失败", "文件保存失败！");
-            }
-        }
-    });
-
-    connect(ui_->action_2, &QAction::triggered, this, [this]() {
-        QString fileName = QFileDialog::getOpenFileName(this, "打开HMI文件", "", "JSON文件 (*.hmi)");
-        if (!fileName.isEmpty()) {
-            if (!hmi_->openFromFile(fileName)) {
-                QMessageBox::warning(this, "打开失败", "文件打开失败或格式不正确！");
-            }
-        }
-    });
+    // 新建/打开/保存文件
+    connect(ui_->actionNew, &QAction::triggered, this, &MainWindow::onNewFile);
+    connect(ui_->actionOpen, &QAction::triggered, this, &MainWindow::onOpenFile);
+    connect(ui_->actionSave, &QAction::triggered, this, &MainWindow::onSaveFile);
 }
 
 MainWindow::~MainWindow()
@@ -64,31 +48,64 @@ void MainWindow::appendLog(const QString& message)
 void MainWindow::onNewFile()
 {
     if (!hmi_)
+    {
         return;
+    }
 
-    if (hmi_->isModified()) {
+    if (hmi_->isModified())
+    {
         auto ret = QMessageBox::warning(this, "提示",
                                         "当前文件有未保存的更改，是否保存？",
-                                        QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
-                                        QMessageBox::Save);
+                                        QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
 
-        if (ret == QMessageBox::Save) {
-            QString fileName = QFileDialog::getSaveFileName(this, "保存HMI设计", "", "JSON文件 (*.json)");
-            if (!fileName.isEmpty()) {
-                if (!hmi_->saveToFile(fileName)) {
+        if (ret == QMessageBox::Save)
+        {
+            QString fileName = QFileDialog::getSaveFileName(this, "保存HMI文件", "", "HMI文件 (*.json)");
+            if (!fileName.isEmpty())
+            {
+                if (!hmi_->saveToFile(fileName))
+                {
                     QMessageBox::warning(this, "保存失败", "文件保存失败！");
                     return; // 不新建，保存失败
                 }
-            } else {
+            }
+            else
+            {
                 return; // 取消保存，取消新建
             }
-        } else if (ret == QMessageBox::Cancel) {
+        }
+        else if (ret == QMessageBox::Cancel)
+        {
             return; // 取消新建
         }
         // 如果是Discard，直接继续新建，丢弃当前修改
     }
-
     // 清空编辑区，新建页面
     hmi_->resetPages();
 }
 
+void MainWindow::onOpenFile()
+{
+    QString fileName = QFileDialog::getOpenFileName(this, "打开HMI文件", "", "HMI文件 (*.hmi)");
+    if (!fileName.isEmpty())
+    {
+        if (!hmi_->openFromFile(fileName))
+        {
+            QMessageBox::warning(this, "打开失败", "文件打开失败或格式不正确！");
+        }
+    }
+}
+
+void MainWindow::onSaveFile()
+{
+
+    QString fileName = QFileDialog::getSaveFileName(this, "保存HMI文件", "", "HMI文件 (*.hmi)");
+    if (!fileName.isEmpty())
+    {
+        if (!hmi_->saveToFile(fileName))
+        {
+            QMessageBox::warning(this, "保存失败", "文件保存失败！");
+        }
+    }
+}
+

mainwindow.h

@@ -5,7 +5,8 @@
 #include "hmimodule.h"
 
 QT_BEGIN_NAMESPACE
-namespace Ui {
+namespace Ui
+{
 class MainWindow;
 }
 QT_END_NAMESPACE
@@ -23,7 +24,9 @@ private:
 
 private slots:
     void appendLog(const QString& message);
-    void onNewFile();  // 新增槽函数，处理“新建”菜单
+    void onNewFile();
+    void onOpenFile();
+    void onSaveFile();
 
 private:
     Ui::MainWindow *ui_;