添加选中框和变换中心点的实时绘制

include/graphicsItem/graphicsBaseItem.h

@@ -235,6 +235,8 @@ public:
                 break;
             }
         }
+
+        m_boundingRect_selected = boundRect.adjusted(-nMargin, -nMargin, nMargin, nMargin);
     }
 
     virtual QRectF boundingRect() const { return m_boundingRect; }
@@ -250,6 +252,7 @@ protected:
     double   m_dWidth;
     double   m_dHeight;
     QRectF   m_boundingRect;
+    QRectF   m_boundingRect_selected;//选中矩形框
 
     QGraphicsPathItem*  m_pOperationCopy; //图元移动和旋转时的操作副本
     QPointF             m_movingIniPos; //移动副本开始移动初始点

source/graphicsItem/graphicsPolygonItem.cpp

@@ -2,6 +2,7 @@
 #include "graphicsItem/itemControlHandle.h"
 
 #include <QPainter>
+#include <QStyleOption>
 
 GraphicPolygonItem::GraphicPolygonItem(QGraphicsItem *parent)
     : GraphicsBaseItem(parent)
@@ -65,6 +66,18 @@ void GraphicPolygonItem::paint(QPainter* painter, const QStyleOptionGraphicsItem
     painter->setPen(m_pen);
     painter->setBrush(m_brush);
     painter->drawPolygon(m_points);
+    //绘制变换原点
+    QPointF originPoint = transformOriginPoint();
+    painter->setBrush(Qt::red);
+    painter->drawEllipse(originPoint, 4, 4);
+
+    if (option->state & QStyle::State_Selected) //是选中状态,绘制选中框
+    {
+        int nPenWidth = 1;
+        painter->setPen(QPen(QColor(70,70,70), nPenWidth, Qt::DashLine)); //蓝色的外框
+        painter->setBrush(Qt::NoBrush);
+        painter->drawRect(m_boundingRect_selected);
+    }
 }
 
 void GraphicPolygonItem::resize(int nHandle,double dSX, double dSY, const QPointF& basePoint)

source/graphicsItem/graphicsRectItem.cpp

@@ -2,6 +2,7 @@
 #include "graphicsItem/itemControlHandle.h"
 
 #include <QPainter>
+#include <QStyleOption>
 
 GraphicsRectItem::GraphicsRectItem(const QRect &rect, bool isRound, QGraphicsItem *parent)
     : GraphicsBaseItem(parent), m_bIsRound(isRound), m_dRatioX(1 / 10.0), m_dRatioY(1 / 10.0)
@@ -104,9 +105,17 @@ void GraphicsRectItem::paint(QPainter* painter, const QStyleOptionGraphicsItem*
         painter->drawRect(m_boundingRect);
 
     //绘制变换原点
-    // QPointF originPoint = transformOriginPoint();
+    QPointF originPoint = transformOriginPoint();
-    // painter->setPen(Qt::red);
+    painter->setBrush(Qt::red);
-    // painter->drawEllipse(originPoint, 5, 5);
+    painter->drawEllipse(originPoint, 4, 4);
+
+    if (option->state & QStyle::State_Selected) //是选中状态,绘制选中框
+    {
+        int nPenWidth = 1;
+        painter->setPen(QPen(QColor(70,70,70), nPenWidth, Qt::DashLine)); //蓝色的外框
+        painter->setBrush(Qt::NoBrush);
+        painter->drawRect(m_boundingRect_selected);
+    }
 }
 
 void GraphicsRectItem::resize(int nHandle,double dSX, double dSY, const QPointF& basePoint)

source/graphicsItem/itemControlHandle.cpp

@@ -1,7 +1,7 @@
 #include "graphicsItem/itemControlHandle.h"
 #include <QPainter>
 
-#define HNDLE_SIZE 6
+#define HNDLE_SIZE 8
 
 ItemControlHandle::ItemControlHandle(QGraphicsItem *parent)
     : QGraphicsRectItem(-HNDLE_SIZE / 2,