实现图元移动

include/graphicsItem/graphicsBaseItem.h

@@ -33,8 +33,11 @@ public:
     double height() { return m_dHeight; }
     void setHeight(double);
 
+    int collidesWithHandle(const QPointF&);
+
     virtual QRectF boundingRect() const { return m_boundingRect; }
 
+    virtual QPainterPath shape() {}
     virtual void updateHandles();
     virtual void resize(int,double, double, const QPointF&) {}
     virtual void updateCoordinate() {}

include/util/baseSelector.h

@@ -61,7 +61,12 @@ protected:
     static int             ms_nDragHandle; //当前抓取的控制点
 
     SelectorType           m_type;
+
+private:
     bool                   m_bHoverOnHandel; //鼠标是否悬停在handel
+    QPointF                m_movingItemIniPos; //图元移动时的初始点
+    QGraphicsPathItem*     m_pMovingItemCopy; //图元移动时的副本
+
 };
 
 #endif

source/graphicsItem/graphicsBaseItem.cpp

@@ -44,6 +44,17 @@ void GraphicsBaseItem::setHeight(double height)
     updateCoordinate();
 }
 
+int GraphicsBaseItem::collidesWithHandle(const QPointF& point)
+{
+    for(auto it = m_vecHanle.begin(); it != m_vecHanle.end(); it++)
+    {
+        QPointF pt = (*it)->mapFromScene(point);
+        if((*it)->contains(pt))
+            return (*it)->getTag();
+    }
+    return HandleTag::H_none;
+}
+
 QVariant GraphicsBaseItem::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant& value)
 {
     if (change == QGraphicsItem::ItemSelectedHasChanged)

source/util/baseSelector.cpp

@@ -13,6 +13,7 @@ BaseSelector::BaseSelector(QObject *parent)
 {
     m_type = ST_base;
     m_bHoverOnHandel = false;
+    m_pMovingItemCopy = nullptr;
 }
 BaseSelector::~BaseSelector()
 {
@@ -39,7 +40,32 @@ void BaseSelector::mousePressEvent(QGraphicsSceneMouseEvent* event, DesignerScen
         item = qgraphicsitem_cast<GraphicsBaseItem*>(items.first());
         if(item)
         {
+            //需要增加当前是否点击在控制点的判断函数
+            if(ms_nDragHandle != H_none && ms_nDragHandle <= H_left) //在缩放控制点上
+                ms_opMode = OM_scale;
+            else if(ms_nDragHandle > H_left) //编辑控制点上
+            {
+                ms_opMode = OM_edit;
+                //setCursor(scene, Qt::ClosedHandCursor);
+            }
+            else
+            {
+                ms_opMode = OM_move;
+                setCursor(scene, Qt::ClosedHandCursor);
 
+                //创建移动时显示的item副本
+                m_pMovingItemCopy = new QGraphicsPathItem(item->shape());
+                m_pMovingItemCopy->setPen(Qt::DashLine);
+                m_pMovingItemCopy->setPos(item->pos());
+                m_pMovingItemCopy->setTransformOriginPoint(item->transformOriginPoint());
+                m_pMovingItemCopy->setTransform(item->transform());
+                m_pMovingItemCopy->setRotation(item->rotation());
+                m_pMovingItemCopy->setScale(item->scale());
+                m_pMovingItemCopy->setZValue(item->zValue());
+                scene->addItem(m_pMovingItemCopy);
+
+                m_movingItemIniPos = item->pos();
+            }
         }
     }
     else if (items.count() > 1) //选中多个
@@ -85,8 +111,23 @@ void BaseSelector::mouseMoveEvent(QGraphicsSceneMouseEvent* event, DesignerScene
 
                 item->resize(ms_nDragHandle, sx, sy, basePoint);
             }
+            else if(ms_nDragHandle > H_left && ms_opMode == OM_edit) //编辑形状
+            {
+
+            }
+            else if(ms_opMode == OM_move)
+            {
+                if(m_pMovingItemCopy)
+                    m_pMovingItemCopy->setPos(m_movingItemIniPos + (ms_ptMouseLast - ms_ptMouseDown));
+            }
         }
     }
+
+    if (ms_opMode != OM_scale && items.count() > 1) //例如多选移动等采用默认行为
+    {
+        scene->callParentEvent(event);
+    }
+
 }
 
 void BaseSelector::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, DesignerScene* scene)
@@ -108,7 +149,7 @@ void BaseSelector::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, DesignerSc
         }
         else if(item && ms_opMode == OM_move && ms_ptMouseLast != ms_ptMouseDown)
         {
-            item->setPos(ms_ptMouseDown + (ms_ptMouseLast - ms_ptMouseDown));
+            item->setPos(m_movingItemIniPos + (ms_ptMouseLast - ms_ptMouseDown));
         }
     }
 
@@ -119,6 +160,13 @@ void BaseSelector::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, DesignerSc
             view->setDragMode(QGraphicsView::NoDrag);
     }
 
+    if(m_pMovingItemCopy)
+    {
+        scene->removeItem(m_pMovingItemCopy);
+        delete m_pMovingItemCopy;
+        m_pMovingItemCopy = nullptr;
+    }
+
     ms_opMode = OM_none;
     m_bHoverOnHandel = false;
     ms_nDragHandle = H_none;