1.ActiveX need export DllRegisitServer.

2.Pixmap Items' coordinates should be recaled when level changed.

qtviewer_planetosm/qtaxviewer_planetosm.def

@@ -5,3 +5,4 @@ DllGetClassObject @2
 DllRegisterServer @3
 DllUnregisterServer @4
 DumpIDL @5
+DllInstall @6

qtvplugin_geomarker/geographicspixmapitem.cpp

@@ -43,36 +43,6 @@ namespace QTVP_GEOMARKER{
 			QGraphicsPixmapItem::setTransformOriginPoint(oldlefttop_x*ratio, oldlefttop_y*ratio );
 		}
 	}
-	void geoGraphicsPixmapItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget /*= nullptr*/)
-	{
-		if (vi())
-		{
-			const int cv = vi()->level();
-			if (cv!=level())
-			{
-				adjust_coords(cv);
-				setLevel(cv);
-			}
-		}
-
-		QGraphicsPixmapItem::paint(painter,option,widget);
-	}
-	QRectF geoGraphicsPixmapItem::boundingRect() const
-	{
-		QRectF rect = QGraphicsPixmapItem::boundingRect();
-		auto v = vi();
-		if (v && v->level()!=level())
-		{
-			double ratio = pow(2.0,(v->level() - level()));
-			QPointF center = rect.center();
-			rect.setRect(center.x() * ratio - rect.width()/2,
-					center.y() * ratio - rect.height()/2,
-					rect.width(),
-					rect.height());
-		}
-		return rect;
-	}
-
 	void geoGraphicsPixmapItem::setPixmap(const tag_icon &icon)
 	{
 		this->m_pIcon = &icon;

qtvplugin_geomarker/geographicspixmapitem.h

@@ -30,8 +30,6 @@ namespace QTVP_GEOMARKER{
 									   ,const tag_icon * pIcon,
 									   qreal cent_lat = 90,
 									   qreal cent_lon = 0);
-		void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr) override;
-		QRectF boundingRect() const override;
 	public:
 		const tag_icon *  icon(){return m_pIcon;}
 		qreal lat() const {return m_lat;}

qtvplugin_geomarker/geographicsscene.cpp

@@ -19,6 +19,27 @@ namespace QTVP_GEOMARKER{
 		:QGraphicsScene(x,y,width,height,parent)
 	{
 
+	}
+
+	/**
+	 * @brief  sequentially call virtual function geoItemBase::adjust_coords for every geoItemBase object.
+	 *
+	 * Since the  scene coord will be zoomed in / out together with level change, all graphics items' coords should
+	 * be recalculated in time. the method adjust_item_coords will do this automatically,
+	 * @param newLevel the level to which current map is zoomed.
+	 */
+	void geoGraphicsScene::adjust_item_coords(int newLevel)
+	{
+		currentNewLevel = newLevel;
+		for (QSet<geoItemBase * >::iterator p = m_set_iconitems.begin();p!=m_set_iconitems.end();++p)
+		{
+			geoItemBase * base = *p;
+			base->adjust_coords(newLevel);
+			//After adjust_coords above, the item "base" is considered to
+			// have a valid coord corresponds to current  newLevel
+			base->setLevel(newLevel);
+		}
+
 	}
 	bool geoGraphicsScene::addItem(geoItemBase * item,int /*reserved*/)
 	{
@@ -35,12 +56,16 @@ namespace QTVP_GEOMARKER{
 					this->removeItem(oldItem,0);
 					this->m_map_items[namec] = item;
 					this->addItem(pg);
+					if (item->item_type()==ITEAMTYPE_PIXMAP)
+						m_set_iconitems.insert(item);
 				}
 			}
 			else
 			{
 				this->addItem(pg);
 				this->m_map_items[namec] = item;
+				if (item->item_type()==ITEAMTYPE_PIXMAP)
+					m_set_iconitems.insert(item);
 			}
 			res = true;
 		}
@@ -58,6 +83,8 @@ namespace QTVP_GEOMARKER{
 			{
 				this->removeItem(pg);
 				m_map_items.remove(c_name);
+				if (item->item_type()==ITEAMTYPE_PIXMAP)
+					m_set_iconitems.remove(item);
 				delete item;
 			}
 		}

qtvplugin_geomarker/geographicsscene.h

@@ -3,6 +3,7 @@
 
 #include <QGraphicsScene>
 #include <QMap>
+#include <QSet>
 namespace QTVP_GEOMARKER{
 	class geoItemBase;
 	/**
@@ -27,8 +28,10 @@ namespace QTVP_GEOMARKER{
 		geoGraphicsScene(const QRectF &sceneRect, QObject *parent = 0);
 		geoGraphicsScene(qreal x, qreal y, qreal width, qreal height, QObject *parent = 0);
 		int currentLevel() const {return currentNewLevel;}
+		void			adjust_item_coords(int currentLevel);
 	private:
 		QMap<QString, geoItemBase * > m_map_items;
+		QSet<geoItemBase * > m_set_iconitems;
 		int currentNewLevel;
 		//Overload public functions to provate.
 		QGraphicsEllipseItem * addEllipse(const QRectF & rect, const QPen & pen = QPen(), const QBrush & brush = QBrush())

qtvplugin_geomarker/qtvplugin_geomarker.cpp

@@ -295,6 +295,7 @@ void qtvplugin_geomarker::cb_levelChanged(int level)
 	//Adjust new Scene rect
 	QRectF rect(0,0,256*(1<<level),256*(1<<level));
 	this->set_visible(false);
+	m_pScene->adjust_item_coords(level);
 	m_pScene->setSceneRect(rect);
 	this->set_visible(true);
 }