按钮和指示灯的缩放

button.cpp

@@ -1,8 +1,10 @@
 #include "button.h"
 #include <QPainter>
 #include <QStyleOptionGraphicsItem>
+#include <QGraphicsSceneMouseEvent>
 #include <QMenu>
 #include <QFileDialog>
+#include <QCursor>
 
 Button::Button(const QString &type) : Item(type)
 {
@@ -11,7 +13,7 @@ Button::Button(const QString &type) : Item(type)
 
 QRectF Button::boundingRect() const
 {
-    return QRectF(0, 0, 50, 50);
+    return QRectF(0, 0, currentSize_.width(), currentSize_.height());
 }
 
 void Button::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
@@ -21,10 +23,10 @@ void Button::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QW
     if (type_ == "按钮") {
         if (!imagePath_.isEmpty() && !customPixmap_.isNull())
         {
-            painter->drawPixmap(0,0,50,50,customPixmap_);
+            painter->drawPixmap(0, 0, currentSize_.width(), currentSize_.height(), customPixmap_);
         }
         else{
-            painter->drawRect(0,0,50,50);
+            painter->drawRect(0, 0, currentSize_.width(), currentSize_.height());
         }
     }
     if (!registerId_.isEmpty()) {
@@ -40,7 +42,7 @@ void Button::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QW
         {
             text = QString("%1\nOFF").arg(registerId());
         }
-        painter->drawText(QRectF(13, 13, 26, 26), Qt::AlignCenter, text);
+        painter->drawText(QRectF(0, 0, currentSize_.width(), currentSize_.height()), Qt::AlignCenter, text);
         painter->restore();
     }
     if (option->state & QStyle::State_Selected) {
@@ -103,8 +105,61 @@ void Button::loadImage()
 {
     if(!imagePath_.isEmpty()){
         customPixmap_ = QPixmap(imagePath_);
-        if (!customPixmap_.isNull()){
-            customPixmap_ = customPixmap_.scaled(50, 50, Qt::KeepAspectRatio, Qt::SmoothTransformation);
-        }
+//        if (!customPixmap_.isNull()){
+//            customPixmap_ = customPixmap_.scaled(50, 50, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+//        }
+    }
+}
+
+void Button::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    // 检查是否点击了调整手柄
+    QRectF resizeHandle = QRectF(currentSize_.width() - resizeHandleSize_,
+                                 currentSize_.height() - resizeHandleSize_,
+                                 resizeHandleSize_,
+                                 resizeHandleSize_);
+
+    if (resizeHandle.contains(event->pos())) {
+        resizing_ = true;
+        resizeStartPos_ = event->scenePos();
+        originalSize_ = currentSize_; // 当前大小
+        event->accept();
+    } else {
+        // 否则调用基类处理（移动等）
+        QGraphicsObject::mousePressEvent(event);
+    }
+}
+
+void Button::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (resizing_) {
+        // 计算新的尺寸
+        QPointF delta = event->scenePos() - resizeStartPos_;
+        qreal newWidth = originalSize_.width() + delta.x();
+        qreal newHeight = originalSize_.height() + delta.y();
+
+        // 限制最小尺寸
+        if (newWidth < 20) newWidth = 20;
+        if (newHeight < 20) newHeight = 20;
+
+        // 更新当前尺寸
+        currentSize_ = QSizeF(newWidth, newHeight);
+
+        // 准备几何变化
+        prepareGeometryChange();
+        update(); // 更新显示
+        event->accept();
+    } else {
+        QGraphicsObject::mouseMoveEvent(event);
+    }
+}
+
+void Button::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (resizing_) {
+        resizing_ = false;
+        event->accept();
+    } else {
+        QGraphicsObject::mouseReleaseEvent(event);
     }
 }

button.h

@@ -15,9 +15,20 @@ public:
     void setCustomImage(const QString& imagePath);
     void loadImage();
 
+    // 鼠标事件处理
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+
 private:
     QString imagePath_;
     QPixmap customPixmap_;
+    bool resizing_ = false;           // 是否正在调整大小
+    QPointF resizeStartPos_;          // 调整大小开始位置
+    QSizeF originalSize_;             // 调整前的原始大小
+    QSizeF currentSize_ = QSizeF(50, 50); // 当前实际尺寸
+    int resizeHandleSize_ = 8;        // 调整手柄大小
+    int resizeMargin_ = 5;            // 调整边距
 };
 
 #endif // BUTTON_H

light.cpp

@@ -3,6 +3,8 @@
 #include <QStyleOptionGraphicsItem>
 #include <QMenu>
 #include <QFileDialog>
+#include <QGraphicsSceneMouseEvent>
+#include <QCursor>
 
 Light::Light(const QString &type) : Item(type)
 {
@@ -11,7 +13,7 @@ Light::Light(const QString &type) : Item(type)
 
 QRectF Light::boundingRect() const
 {
-    return QRectF(0, 0, 50, 50);
+    return QRectF(0, 0, currentSize_.width(), currentSize_.height());
 }
 
 void Light::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
@@ -20,16 +22,16 @@ void Light::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWi
 
     if (type_ == "指示灯") {
         if (state() && !onPixmap_.isNull()) {
-            painter->drawPixmap(0, 0, 50, 50, onPixmap_);
+            painter->drawPixmap(0, 0, currentSize_.width(), currentSize_.height(), onPixmap_);
         } else if (!state() && !offPixmap_.isNull()) {
-            painter->drawPixmap(0, 0, 50, 50, offPixmap_);
+            painter->drawPixmap(0, 0, currentSize_.width(), currentSize_.height(), offPixmap_);
         } else {
             if (state()) {
                 painter->setBrush(Qt::green); // 激活状态
             } else {
                 painter->setBrush(Qt::white); // 未激活状态
             }
-            painter->drawEllipse(0,0,50,50);
+            painter->drawEllipse(0, 0, currentSize_.width(), currentSize_.height());
         }
     }
     if (!registerId_.isEmpty()) {
@@ -37,7 +39,7 @@ void Light::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWi
         painter->setFont(QFont("Arial", 8));
         painter->setPen(Qt::black);
         QString text = QString("%1").arg(registerId());
-        painter->drawText(QRectF(13, 13, 26, 26), Qt::AlignCenter, text);
+        painter->drawText(QRectF(0, 0, currentSize_.width(), currentSize_.height()), Qt::AlignCenter, text);
         painter->restore();
     }
     if (option->state & QStyle::State_Selected) {
@@ -115,14 +117,60 @@ void Light::loadImage()
 {
     if (!onImagePath_.isEmpty()) {
         onPixmap_ = QPixmap(onImagePath_);
-        if (!onPixmap_.isNull()) {
-            onPixmap_ = onPixmap_.scaled(50, 50, Qt::KeepAspectRatio, Qt::SmoothTransformation);
-        }
     }
     if (!offImagePath_.isEmpty()) {
         offPixmap_ = QPixmap(offImagePath_);
-        if (!offPixmap_.isNull()) {
-            offPixmap_ = offPixmap_.scaled(50, 50, Qt::KeepAspectRatio, Qt::SmoothTransformation);
-        }
+    }
+}
+
+void Light::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    // 检查是否点击了调整手柄
+    QRectF resizeHandle = QRectF(currentSize_.width() - resizeHandleSize_,
+                                 currentSize_.height() - resizeHandleSize_,
+                                 resizeHandleSize_, resizeHandleSize_);
+
+    if (resizeHandle.contains(event->pos())) {
+        resizing_ = true;
+        resizeStartPos_ = event->scenePos();
+        originalSize_ = currentSize_; // 当前大小
+        event->accept();
+    } else {
+        // 否则调用基类处理（移动等）
+        QGraphicsObject::mousePressEvent(event);
+    }
+}
+
+void Light::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (resizing_) {
+        // 计算新的尺寸
+        QPointF delta = event->scenePos() - resizeStartPos_;
+        qreal newWidth = originalSize_.width() + delta.x();
+        qreal newHeight = originalSize_.height() + delta.y();
+
+        // 限制最小尺寸
+        if (newWidth < 20) newWidth = 20;
+        if (newHeight < 20) newHeight = 20;
+
+        // 更新当前尺寸
+        currentSize_ = QSizeF(newWidth, newHeight);
+
+        // 准备几何变化
+        prepareGeometryChange();
+        update(); // 更新显示
+        event->accept();
+    } else {
+        QGraphicsObject::mouseMoveEvent(event);
+    }
+}
+
+void Light::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (resizing_) {
+        resizing_ = false;
+        event->accept();
+    } else {
+        QGraphicsObject::mouseReleaseEvent(event);
     }
 }

light.h

@@ -18,11 +18,21 @@ public:
     void setOffImage(const QString& imagePath);
     void loadImage();
 
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+
 private:
     QString onImagePath_;   // ON状态图片路径
     QString offImagePath_;  // OFF状态图片路径
     QPixmap onPixmap_;      // ON状态图片
     QPixmap offPixmap_;     // OFF状态图片
+    bool resizing_ = false;           // 是否正在调整大小
+    QPointF resizeStartPos_;          // 调整大小开始位置
+    QSizeF originalSize_;             // 调整前的原始大小
+    QSizeF currentSize_ = QSizeF(50, 50); // 当前实际尺寸
+    int resizeHandleSize_ = 8;        // 调整手柄大小
+    int resizeMargin_ = 5;            // 调整边距
 };
 
 #endif // LIGHT_H