add combobox

+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+
+# User-specific files
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+
+# Visual Studio 2015 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+**/Properties/launchSettings.json
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# TODO: Comment the next line if you want to checkin your web deploy settings
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# The packages folder can be ignored because of Package Restore
+**/packages/*
+# except build/, which is used as an MSBuild target.
+!**/packages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/packages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Typescript v1 declaration files
+typings/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# JetBrains Rider
+.idea/
+*.sln.iml
+
+# CodeRush
+.cr/
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# C++ objects and libs
+
+*.slo
+*.lo
+*.o
+*.a
+*.la
+*.lai
+*.so
+*.dll
+*.dylib
+
+# Qt-es
+
+/.qmake.cache
+/.qmake.stash
+*.pro.user
+*.pro.user.*
+*.qbs.user
+*.qbs.user.*
+*.moc
+moc_*.cpp
+qrc_*.cpp
+ui_*.h
+Makefile*
+*build-*
+
+# QtCreator
+
+*.autosave
+
+# QtCtreator Qml
+*.qmlproject.user
+*.qmlproject.user.*
+
+# QtCtreator CMake
+CMakeLists.txt.user*
\ No newline at end of file

+#include "EdgeItem.h"
+#include <QtWidgets>
+
+void EdgeItem::mousePressEvent(QGraphicsSceneMouseEvent * event)
+{
+}
+
+void EdgeItem::mouseMoveEvent(QGraphicsSceneMouseEvent * event)
+{
+}
+
+void EdgeItem::mouseReleaseEvent(QGraphicsSceneMouseEvent * event)
+{
+}
+
+EdgeItem::EdgeItem(double x1, double y1, double x2, double y2, QColor color, int width)
+{
+	this->x1 = x1;
+	this->y1 = y1;
+	this->x2 = x2;
+	this->y2 = y2;
+
+	this->color = color;
+	this->width = width;
+	setZValue(0);	//노드 앞 가리지 않도록 ZValue 설정
+
+	/*setFlags(ItemIsSelectable | ItemIsMovable);
+	setAcceptHoverEvents(true);*/
+}
+
+QRectF EdgeItem::boundingRect() const
+{
+	return QRectF(0,0,0,0);
+}
+
+QPainterPath EdgeItem::shape() const
+{
+	QPainterPath path;
+	return path;
+}
+
+void EdgeItem::paint(QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget)
+{
+	Q_UNUSED(widget);
+
+	QPen oldPen = painter->pen();
+	QPen pen = oldPen;
+	pen.setWidth(width);
+	pen.setColor(color);
+	painter->setPen(pen);
+	painter->drawLine(QLineF(x1, y1, x2, y2));
+}

+#ifndef EDGEITEM_H
+#define EDGEITEM_H
+
+#include <QColor>
+#include <QGraphicsItem>
+
+
+class EdgeItem
+	: public QGraphicsItem
+{
+private:
+	double x1, y1, x2, y2;
+	int width;
+	QColor color;
+
+protected:
+	void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+	void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+	void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+
+public:
+	EdgeItem(double x1, double y1, double x2, double y2, QColor color, int width);
+
+	QRectF boundingRect() const override;
+	QPainterPath shape() const override;
+	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
+};
+
+#endif // EDGEITEM_H
\ No newline at end of file

+#include "GraphItem.h"
+
+#include <boost/graph/fruchterman_reingold.hpp>
+#include <boost/graph/random_layout.hpp>
+#include <boost/graph/circle_layout.hpp>
+#include <boost/graph/dijkstra_shortest_paths.hpp>
+#include <boost/algorithm/string.hpp>	//boost::split
+#include <boost/bimap.hpp>
+#include <boost/regex.hpp>
+
+#include <exception>
+#include <iterator>
+#include <string>
+#include <map>
+#include <vector>
+
+#include <QDebug>
+#include <QtWidgets>
+
+
+GraphItem::GraphItem(ifstream& fin)
+{
+	if (!fin)
+		throw std::exception("graph file input is invalid");
+
+	/**
+	 *	Parse Paper dataset
+	 *	- paper_key, [author_list], publish_year
+	 *	Column Delimiter:		||
+	 *	Author list Delimiter:	&&
+	 */
+	std::string line;
+	vector<std::string> tokens;
+	vector<std::string> authors;
+	vector<pair<string, string>> edges;
+	
+	//String <--> int 양방향 변환을 위해 bidirectional map 상숑
+	//map<string, int> -> <vertex label, vertex index>
+	typedef boost::bimap<string, int> bm_type;
+	bm_type node_ids;
+	vector<simple_edge> edges_indexes;	//int로 변환된 edge
+	
+	int node_cnt = 0;
+	qDebug() << "* graph reading start";
+	
+	//한 줄씩 읽어서 Parse
+	while (std::getline(fin, line) && !line.empty()) {
+		//boost::split 이용해 문자열 분리
+		//tokens[0]: Paper-key.	ex) conf/iastedCSN/KeimS06
+		//tokens[1]: Authors.	ex) Werner Keim&&Arpad L. Scholtz
+		//tokens[2]: Published year.
+		boost::split(tokens, line, boost::is_any_of("||"), boost::token_compress_on);
+		boost::split(authors, tokens[1], boost::is_any_of("&&"), boost::token_compress_on);
+			
+		const string& paper_key = tokens[0];
+		if (node_ids.left.find(paper_key) == node_ids.left.end()) {
+			node_ids.insert(bm_type::value_type(paper_key, node_cnt++));
+		}
+	
+		for (auto author : authors) {
+			edges.push_back(pair<string, string>(paper_key, author));
+			if (node_ids.left.find(author) == node_ids.left.end()) {
+				node_ids.insert(bm_type::value_type(author, node_cnt++));
+			}
+		}
+	
+		//debug
+		if (node_cnt > NODE_LIMIT) break;
+	}
+	qDebug() << "* graph reading complete";
+	qDebug() << "* # of nodes: " << node_cnt;
+	qDebug() << "* # of edges: " << edges.size();
+	
+	//edge conversion
+	//<string, string> to <int, int>
+	//using boost::bimap (bidirectional map)
+	for (auto edge : edges) {
+		edges_indexes.push_back({
+			node_ids.left.find(edge.first)->get_right(),
+			node_ids.left.find(edge.second)->get_right()
+		});
+	}
+	//Graph --> defined in "PaperGraphWidget.h"
+	//Graph graph(edges_indexes.begin(), edges_indexes.end(), node_ids.size());
+	graph = new Graph(edges_indexes.begin(), edges_indexes.end(), node_ids.size());
+	
+	//set index property
+	qDebug() << "* set vertex property start";
+	typedef typename graph_traits<Graph>::edge_iterator edge_iterator;
+	typedef typename graph_traits<Graph>::vertex_iterator vertex_iterator;
+	vertex_iterator vi, vi_end;
+	int i = 0;
+	for (boost::tie(vi, vi_end)=vertices(*graph); vi!=vi_end; ++vi) {
+		//Vertex Property 설정
+		//index: 0 ~ ...
+		//name : map의 value(i) 기준으로 찾은 Key
+		//		map --> map<string, int> (boost bidirectional map)
+		boost::put(vertex_index, *graph, *vi, i);
+		boost::put(vertex_name, *graph, *vi,
+			node_ids.right.find(i)->get_left());
+	
+		++i;
+	}
+	qDebug() << "* set vertex property end";
+
+
+	//qDebug("* set edges weight start");
+	////모든 edge의 weight를 1로 설정
+	//typename graph_traits<Graph>::edge_iterator ei, ei_end;
+	//for (boost::tie(ei, ei_end)=boost::edges(*graph); ei!=ei_end; ++ei) {
+	//	boost::put(edge_weight, *graph, *ei, 1);
+	//}
+	//qDebug("* set edges weight end");
+	//
+	//
+	//qDebug("* path highlighting start");
+	////find start, end node's id
+	//int start_idx, end_idx;
+	//for (boost::tie(vi, vi_end)=vertices(*graph); vi!=vi_end; ++vi) {
+	//	string node_name = boost::get(vertex_name, *graph, *vi);
+	//	if (node_name == "Seong Chul Cho") {
+	//		start_idx = boost::get(vertex_index, *graph, *vi);
+	//	} else if (node_name == "Hyung Jin Kim") {
+	//		end_idx = boost::get(vertex_index, *graph, *vi);
+	//	}
+	//}
+
+	//typedef boost::graph_traits<Graph>::vertex_descriptor vertex_descriptor;
+	//vector<vertex_descriptor> parents(num_vertices(*graph));
+	//vector<int> distances(num_vertices(*graph));
+	//vertex_descriptor start_vertex = vertex(start_idx, *graph);
+	//dijkstra_shortest_paths(*graph, start_vertex,
+	//	predecessor_map(&parents[0]).distance_map(&distances[0]));
+	////path finding
+	//vertex_descriptor current = boost::vertex(end_idx, *graph);
+	//while (current != boost::vertex(start_idx, *graph)) {
+	//}
+	//qDebug("* path highlighting end");
+	
+
+	//graph layout calculation
+	//using boost::random_graph_layout and boost::kamada_kawai_spring_layout
+	//vertex마다 계산된 좌표를 property에 적용
+	//예제 코드: http://www.boost.org/doc/libs/1_63_0/libs/graph/test/layout_test.cpp
+	//(-> 콘솔 기반)
+	qDebug() << "* make graph layout start";
+	typedef square_topology<> Topology;
+	minstd_rand gen;
+	Topology topology(gen, (double)SCREEN_SIZE);
+	Topology::point_type origin;
+	origin[0] = origin[1] = (double)SCREEN_SIZE;
+	Topology::point_difference_type extent;
+	extent[0] = extent[1] = (double)SCREEN_SIZE;
+	rectangle_topology<> rect_top(gen,
+		-SCREEN_SIZE/2, -SCREEN_SIZE/2,
+		SCREEN_SIZE/2, SCREEN_SIZE/2);
+		
+	switch (LAYOUT_MODE) {
+	case GRAPH_LAYOUT::RANDOM_LAYOUT:
+		random_graph_layout(*graph, get(vertex_position, *graph), rect_top);
+		break;
+	
+	case GRAPH_LAYOUT::CIRCLE_LAYOUT:
+		circle_graph_layout(*graph, get(vertex_position, *graph), SCREEN_SIZE/2);
+		break;
+	
+	case GRAPH_LAYOUT::FRUCHTERMAN_REINGOLD_LAYOUT:
+		fruchterman_reingold_force_directed_layout(*graph,
+			get(vertex_position, *graph),
+			topology,
+			attractive_force(square_distance_attractive_force())
+			.cooling(linear_cooling<double>(50))
+		);
+		break;
+	}
+	qDebug() << "* make graph layout end";
+
+
+	//add edges
+	typedef square_topology<> Topology;
+	typedef typename Topology::point_type Point;
+	auto position = get(vertex_position, *graph);
+	auto label = get(vertex_name, *graph);
+
+	typedef boost::graph_traits<Graph>::vertex_descriptor vertex_descriptor;
+	typename graph_traits<Graph>::edge_iterator ei, ei_end;
+	vertex_descriptor u, v;
+	for (boost::tie(ei, ei_end)=boost::edges(*graph); ei!=ei_end; ++ei) {
+		u = source(*ei, *graph);
+		v = target(*ei, *graph);
+		Point p1 = position[u];
+		Point p2 = position[v];
+
+		//make edge item and push it to list
+		EdgeItem *edge;
+		
+		//if (label[u] == "conf/sbrn/GomesPSRC10" ||
+		//	label[u] == "conf/iastedCSN/KeimS06" ||
+		//	label[v] == "conf/sbrn/GomesPSRC10" ||
+		//	label[v] == "conf/iastedCSN/KeimS06") {
+		//	//highlight
+		//	edge = new EdgeItem(p1[0], p1[1], p2[0], p2[1], QColor(Qt::blue), 3);
+		//} else {
+		//	edge = new EdgeItem(p1[0], p1[1], p2[0], p2[1], QColor(Qt::black), 0);
+		//}
+		edge = new EdgeItem(p1[0], p1[1], p2[0], p2[1], QColor(Qt::black), 0);
+		edge->setPos(p1[0], p1[1]);
+		edgeList << edge;
+	}
+
+	//add nodes
+	for (boost::tie(vi, vi_end)=vertices(*graph); vi!=vi_end; ++vi) {
+		Point p = position[*vi];
+		std::string name = label[*vi];
+
+		//make node item and push it to list
+		NodeItem *node;
+		//if (name == "conf/sbrn/GomesPSRC10" ||
+		//	name == "conf/iastedCSN/KeimS06") {
+		//	//highlight
+		//	node = new NodeItem(p[0], p[1], QColor(Qt::blue), QString(name.c_str()));
+		//} else {
+		//	node = new NodeItem(p[0], p[1], QColor(Qt::green), QString(name.c_str()));
+		//}
+		node = new NodeItem(p[0], p[1], QColor(Qt::green), QString(name.c_str()));
+		node->setPos(QPointF(p[0], p[1]));
+		nodeList << node;
+	}
+}
+
+//override
+QRectF GraphItem::boundingRect() const
+{
+	//TODO
+	return QRectF(-SCREEN_SIZE/2, -SCREEN_SIZE/2, SCREEN_SIZE, SCREEN_SIZE);
+}
+
+QPainterPath GraphItem::shape() const
+{
+	QPainterPath path;
+	return path;
+}
+
+void GraphItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+	if (!graph)
+		return;
+
+	//debug
+	//-> x, y, w, h
+	//현재 Graph의 bounding rect 출력
+	/*QPen oldPen = painter->pen();
+	QPen pen = oldPen;
+	pen.setColor(Qt::red);
+	painter->setPen(pen);
+	painter->drawRect(QRectF(-SCREEN_SIZE/2, -SCREEN_SIZE/2, SCREEN_SIZE, SCREEN_SIZE));*/
+
+	//print edges
+	for (auto edge: edgeList) {
+		edge->paint(painter, option, widget);
+	}
+	
+	//print nodes
+	for (auto node: nodeList) {
+		node->paint(painter, option, widget);
+	}
+}
+
+//event handler
+void GraphItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+}
+
+void GraphItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+}
+
+void GraphItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+}

+#ifndef GRAPHITEM_H
+#define GRAPHITEM_H
+
+#include <QGraphicsItem>
+#include <QList>
+#include <QColor>
+
+#include <boost/graph/adjacency_list.hpp>
+#include <boost/graph/topology.hpp>
+#include <boost/graph/graph_traits.hpp>
+
+#include <fstream>
+
+#include "NodeItem.h"
+#include "EdgeItem.h"
+
+using namespace std;
+using namespace boost;
+
+
+enum GRAPH_LAYOUT {
+	RANDOM_LAYOUT,
+	CIRCLE_LAYOUT,
+	//KAMADA_KAWAI_LAYOUT,
+	FRUCHTERMAN_REINGOLD_LAYOUT	//slow
+};
+/**
+ *	Constants
+ */
+const int LAYOUT_MODE = GRAPH_LAYOUT::RANDOM_LAYOUT;
+const int SCREEN_SIZE = 300;
+const int NODE_LIMIT = 100;
+
+
+enum vertex_position_t { vertex_position };
+namespace boost {
+	BOOST_INSTALL_PROPERTY(vertex, position);
+}
+typedef square_topology<>::point_type point;
+struct simple_edge {
+	int first, second;
+};
+typedef boost::property<vertex_index_t, int,
+	boost::property<vertex_name_t, std::string,
+	boost::property<vertex_position_t, point>>
+> VertexProperties;
+typedef adjacency_list<
+	listS,	//outEdgeList
+	listS,	//VertexList
+	undirectedS,
+	//vertex properties
+	VertexProperties,
+	//edge properties
+	boost::property<edge_weight_t, double>
+> Graph;
+
+
+class GraphItem
+	: public QGraphicsItem
+{
+public:
+	GraphItem(ifstream& fin);
+
+	//overrides
+	QRectF boundingRect() const override;
+	QPainterPath shape() const override;
+	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
+
+	//methods
+	void path_highlighting(std::string start, std::string end);
+	//
+
+protected:
+	void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+	void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+	void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+
+private:
+	Graph *graph = nullptr;
+	QList<NodeItem *> nodeList;
+	QList<EdgeItem *> edgeList;
+};
+
+#endif // GRAPHITEM_H

 #include "GraphicsView.h"
 #include <qmath.h>
+#include <QKeyEvent>
 
 //View
 View::View(const QString& name, QWidget *parent)
@@ -12,8 +13,6 @@ View::View(const QString& name, QWidget *parent)
 	graphicsView->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
 	graphicsView->setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
 
-	//connect
-
 	//layout
 	QGridLayout *topLayout = new QGridLayout;
 	topLayout->addWidget(graphicsView, 0, 0);
@@ -29,11 +28,27 @@ QGraphicsView* View::view() const
 
 void View::setupMatrix()
 {
-	qreal scale = qPow(qreal(2), qreal(2));
+	qreal scale = qPow(qreal(1), qreal(1));
 
 	QMatrix matrix;
 	matrix.scale(scale, scale);
 	matrix.rotate(qreal(0));
 
 	graphicsView->setMatrix(matrix);
-}
\ No newline at end of file
+}
+
+#ifndef QT_NO_WHEELEVENT
+void GraphicsView::wheelEvent(QWheelEvent * event)
+{
+	scaleView(pow((double)2, event->delta() / 240.0));
+}
+#endif
+
+void GraphicsView::scaleView(qreal scaleFactor)
+{
+	qreal factor = transform().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
+	if (factor < 0.07 || factor > 100)
+		return;
+
+	scale(scaleFactor, scaleFactor);
+}

@@ -16,6 +16,12 @@ class GraphicsView
 private:
 	View* view;
 
+protected:
+#ifndef QT_NO_WHEELEVENT
+	void wheelEvent(QWheelEvent *event) override;
+#endif
+	void scaleView(qreal scaleFactor);
+
 public:
 	GraphicsView(View *v): QGraphicsView(), view(v) {};
 };

 #include "NodeItem.h"
 #include <QtWidgets>
+#include <QMessageBox>
 
 void NodeItem::mousePressEvent(QGraphicsSceneMouseEvent * event)
 {
+	/*if (event->button() == Qt::LeftButton) {
+		QMessageBox msgbox;
+		msgbox.setText("hi");
+		msgbox.setInformativeText("hi2");
+		msgbox.setStandardButtons(QMessageBox::Ok);
+		msgbox.setDefaultButton(QMessageBox::Ok);
+
+		msgbox.exec();
+	}*/
 }
 
 void NodeItem::mouseMoveEvent(QGraphicsSceneMouseEvent * event)
@@ -13,16 +23,17 @@ void NodeItem::mouseReleaseEvent(QGraphicsSceneMouseEvent * event)
 {
 }
 
-NodeItem::NodeItem(int x, int y, QString label)
+NodeItem::NodeItem(double x, double y, QColor color, QString label)
 {
+	//node constructor
 	this->x = x;
 	this->y = y;
-	this->color = QColor(Qt::green);
+	this->color = color;
 	this->label = label;
 	setZValue(1);
 	
-	setFlags(ItemIsSelectable | ItemIsMovable);
-	setAcceptHoverEvents(true);
+	//setFlags(ItemIsSelectable | ItemIsMovable);
+	//setAcceptHoverEvents(true);
 }
 
 QRectF NodeItem::boundingRect() const
@@ -33,7 +44,6 @@ QRectF NodeItem::boundingRect() const
 QPainterPath NodeItem::shape() const
 {
 	QPainterPath path;
-	//path.addRect(14, 14, 82, 42);
 	path.addRect(0, 0, NODE_SIZE, NODE_SIZE);
 	return path;
 }
@@ -42,23 +52,24 @@ void NodeItem::paint(QPainter * painter, const QStyleOptionGraphicsItem * option
 {
 	Q_UNUSED(widget);
 
+	//set node pen style
+	QPen oldPen = painter->pen();
+	QPen pen = oldPen;
+	pen.setWidth(0);
+	pen.setColor(QColor(Qt::black));
+	painter->setPen(pen);
+
 	//label 
-	QFont font("Gulim", 10);
-	font.setStyleStrategy(QFont::ForceOutline);
+	QFont font("Gulim", 3);	//set font, font size
 	painter->setFont(font);
 	painter->save();
-	painter->scale(0.3, 0.3);
-	painter->drawText(0, 0, label);
+	painter->drawText(x, y, label);
 	painter->restore();
 
 
-	//Rectangle 
+	//node rectangle 
 	QColor fillColor = (option->state & QStyle::State_Selected) ? color.dark(150) : color;
 	if (option->state & QStyle::State_MouseOver) fillColor = fillColor.light(125);
-	QPen pen = painter->pen();
-	pen.setWidth(0);
-	pen.setColor(QColor(Qt::black));
-	painter->setPen(pen);
 	painter->setBrush(QBrush(fillColor));
-	painter->drawRect(0, 0, NODE_SIZE, NODE_SIZE);
+	painter->drawRect(x, y, NODE_SIZE, NODE_SIZE);
 }

@@ -11,8 +11,8 @@ class NodeItem
 	: public QGraphicsItem
 {
 private:
-	int x;
-	int y;
+	double x;
+	double y;
 	QColor color;
 	QString label;
 
@@ -22,7 +22,7 @@ protected:
 	void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
 
 public:
-	NodeItem(int x, int y, QString label);
+	NodeItem(double x, double y, QColor color, QString label);
 
 	QRectF boundingRect() const override;
 	QPainterPath shape() const override;

@@ -145,6 +145,7 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="EdgeItem.cpp" />
     <ClCompile Include="GeneratedFiles\Debug\moc_GraphicsView.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
@@ -172,6 +173,7 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="GraphicsView.cpp" />
+    <ClCompile Include="GraphItem.cpp" />
     <ClCompile Include="main.cpp" />
     <ClCompile Include="NodeItem.cpp" />
     <ClCompile Include="PaperGraphWidget.cpp" />
@@ -217,6 +219,7 @@
     </CustomBuild>
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="EdgeItem.h" />
     <ClInclude Include="GeneratedFiles\ui_PaperGraphWidget.h" />
     <CustomBuild Include="GraphicsView.h">
       <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(QTDIR)\bin\moc.exe;%(FullPath)</AdditionalInputs>
@@ -236,6 +239,7 @@
       <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|x64'">.\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp</Outputs>
       <Command Condition="'$(Configuration)|$(Platform)'=='Release|x64'">"$(QTDIR)\bin\moc.exe"  "%(FullPath)" -o ".\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp"  -DUNICODE -DWIN32 -DQT_DLL -DQT_NO_DEBUG -DNDEBUG -DQT_CORE_LIB -DQT_GUI_LIB -DQT_WIDGETS_LIB "-I.\GeneratedFiles" "-I." "-I$(QTDIR)\include" "-I.\GeneratedFiles\$(ConfigurationName)\." "-I$(QTDIR)\include\QtCore" "-I$(QTDIR)\include\QtGui" "-I$(QTDIR)\include\QtWidgets"</Command>
     </CustomBuild>
+    <ClInclude Include="GraphItem.h" />
     <ClInclude Include="NodeItem.h" />
   </ItemGroup>
   <ItemGroup>

@@ -62,6 +62,12 @@
     <ClCompile Include="GeneratedFiles\Release\moc_GraphicsView.cpp">
       <Filter>Generated Files\Release</Filter>
     </ClCompile>
+    <ClCompile Include="GraphItem.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="EdgeItem.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <CustomBuild Include="PaperGraphWidget.h">
@@ -84,5 +90,11 @@
     <ClInclude Include="NodeItem.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="GraphItem.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="EdgeItem.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file

@@ -3,6 +3,9 @@
 #include "GraphicsView.h"
 
 #include <string>
+#include <QComboBox>
+#include <QMessageBox>
+#include <QtGui>
 
 PaperGraphWidget::PaperGraphWidget(QWidget *parent)
 	: QWidget(parent)
@@ -12,77 +15,40 @@ PaperGraphWidget::PaperGraphWidget(QWidget *parent)
 
 	View *view = new View("temp view");
 	view->view()->setScene(scene);
-	QHBoxLayout *layout = new QHBoxLayout;
+
+	QVBoxLayout *layout = new QVBoxLayout;
+	QComboBox *combo = new QComboBox;
+	combo->addItem("conf/iastedCSN/KeimS06");
+	combo->addItem("conf/iastedCSN/Mojumdar06");
+	combo->addItem("conf/iastedCSN/PourKKI06");
+	connect(combo, SIGNAL(currentIndexChanged(int)),
+		this, SLOT(handleSelectionChanged(int)));
+
+	layout->addWidget(combo);
 	layout->addWidget(view);
 	setLayout(layout);
 
 	setWindowTitle(tr("dblp paper graph visualization"));
 }
 
-void PaperGraphWidget::print_graph(const Graph & graph)
+void PaperGraphWidget::print_graph(ifstream& fin)
 {
-	//print graph
-	typedef square_topology<> Topology;
-	typedef typename Topology::point_type Point;
-	const int rect_sz = 4;
-	auto position = get(vertex_position, graph);
-	auto label = get(vertex_name, graph);
-	
-
-
-	//print edges
-	typename graph_traits<Graph>::edge_iterator ei, ei_end;
-	typedef boost::graph_traits<Graph>::vertex_descriptor VertexDescriptor;
-	VertexDescriptor u, v;
-	for (boost::tie(ei, ei_end)=edges(graph); ei!=ei_end; ++ei) {
-		u = source(*ei, graph);
-		v = target(*ei, graph);
-
-		Point p1 = position[u];
-		Point p2 = position[v];
-
-		/*line = scene->addLine(
-			p1[0], p1[1],
-			p2[0], p2[1],
-			QPen(Qt::black)
-		);*/
-		//QGraphicsItem *edge =
-		//	new EdgeItem(p1[0], p1[1], p2[0], p2[1]);
-		//edge->setPos(QPointF(p1[0], p1[1]));
-		//scene->addItem(edge);
-
-		scene->addLine(p1[0], p1[1], p2[0], p2[1], QPen(Qt::black, 0));
-	}
+	QGraphicsItem *graph_item = new GraphItem(fin);
+	graph_item->setPos(0, 0);
+	scene->addItem(graph_item);
+}
 
-	//print nodes
-	typename graph_traits<Graph>::vertex_iterator vi, vi_end;
-	for (boost::tie(vi, vi_end)=vertices(graph); vi!=vi_end; ++vi) {
-		//Point p = position[*vi];
-		//rectangle = scene->addRect(
-		//	p[0], p[1], rect_sz, rect_sz,
-		//	QPen(Qt::black),
-		//	QBrush(Qt::green));
-		Point p = position[*vi];
-		std::string name = label[*vi];
-		QGraphicsItem *node = new NodeItem(p[0], p[1], QString(name.c_str()));
-		node->setPos(QPointF(p[0], p[1]));
-		scene->addItem(node);
+void PaperGraphWidget::handleSelectionChanged(int idx)
+{
+	/*QMessageBox::information(this, "QCombobox", 
+		"idx: "+QString::number(idx));*/
+	if (idx==0) {
+	} else if (idx==1) {
+	} else {
 	}
 }
 
 void PaperGraphWidget::initscene()
 {
 	scene = new QGraphicsScene(this);
-
-	//int x = 0, y;
-	//for (int i=-11000; i<11000; i+=110) {
-	//	++x;
-	//	y = 0;
-	//	for (int j=-7000; j<7000; j+=70) {
-	//		++y;
-	//		QGraphicsItem *item = new NodeItem(x, y);
-	//		item->setPos(QPointF(i, j));
-	//		scene->addItem(item);
-	//	}
-	//}
 }

@@ -4,46 +4,22 @@
 #include <QtWidgets/QWidget>
 #include <QGraphicsScene>
 
-#include <boost/graph/adjacency_list.hpp>
-#include <boost/graph/topology.hpp>
-#include <boost/graph/graph_traits.hpp>
+#include <fstream>
 
+#include "GraphItem.h"
 #include "ui_PaperGraphWidget.h"
 
 
-using namespace boost;
-
-
-enum vertex_position_t { vertex_position };
-namespace boost {
-	BOOST_INSTALL_PROPERTY(vertex, position);
-}
-typedef square_topology<>::point_type point;
-struct simple_edge {
-	int first, second;
-};
-typedef boost::property<vertex_index_t, int,
-	boost::property<vertex_name_t, std::string,
-	boost::property<vertex_position_t, point>>
-> VertexProperties;
-typedef adjacency_list<
-	listS,	//outEdgeList
-	listS,	//VertexList
-	undirectedS,
-	//vertex properties
-	VertexProperties,
-	//edge properties
-	boost::property<edge_weight_t, double>
-> Graph;
-
-
 class PaperGraphWidget : public QWidget
 {
 	Q_OBJECT
 
 public:
 	PaperGraphWidget(QWidget *parent = 0);
-	void print_graph(const Graph& graph);
+	void print_graph(ifstream& fin);
+
+private slots:
+	void handleSelectionChanged(int idx);
 
 private:
 	void initscene();

@@ -14,7 +14,6 @@
 //#include <boost/graph/kamada_kawai_spring_layout.hpp>
 #include <boost/graph/random_layout.hpp>
 #include <boost/graph/circle_layout.hpp>
-#include <boost/graph/dijkstra_shortest_paths.hpp>
 #include <boost/algorithm/string.hpp>	//boost::split
 #include <boost/bimap.hpp>
 
@@ -24,187 +23,22 @@ using namespace std;
  *	Constants
  */
 const char* PAPER_FILENAME = "dblp-paper.txt";
-enum GRAPH_LAYOUT {
-	RANDOM_LAYOUT,
-	CIRCLE_LAYOUT,
-	//KAMADA_KAWAI_LAYOUT,
-	FRUCHTERMAN_REINGOLD_LAYOUT	//slow
-};
-const int LAYOUT_MODE = GRAPH_LAYOUT::RANDOM_LAYOUT;
-const int SCREEN_SIZE = 500;
-const int NODE_LIMIT = 100;
-
-Graph read_graph(ifstream& in) throw(std::exception) {
-	/**
-	 *	Parse Paper dataset
-	 *	- paper_key, [author_list], publish_year
-	 *	Column Delimiter:		||
-	 *	Author list Delimiter:	&&
-	 */
-	std::string line;
-	vector<std::string> tokens;
-	vector<std::string> authors;
-	vector<pair<string, string>> edges;
-
-	//String <--> int 양방향 변환을 위해 bidirectional map 상숑
-	//map<string, int> -> <vertex label, vertex index>
-	typedef boost::bimap<string, int> bm_type;
-	bm_type node_ids;
-	vector<simple_edge> edges_indexes;	//int로 변환된 edge
-
-	int node_cnt = 0;
-	qDebug() << "* graph reading start";
-
-	//한 줄씩 읽어서 Parse
-	while (std::getline(in, line) && !line.empty()) {
-		//boost::split 이용해 문자열 분리
-		//tokens[0]: Paper-key.	ex) conf/iastedCSN/KeimS06
-		//tokens[1]: Authors.	ex) Werner Keim&&Arpad L. Scholtz
-		//tokens[2]: Published year.
-		boost::split(tokens, line, boost::is_any_of("||"), boost::token_compress_on);
-		boost::split(authors, tokens[1], boost::is_any_of("&&"), boost::token_compress_on);
-		
-		const string& paper_key = tokens[0];
-		if (node_ids.left.find(paper_key) == node_ids.left.end()) {
-			node_ids.insert(bm_type::value_type(paper_key, node_cnt++));
-		}
-
-		for (auto author : authors) {
-			edges.push_back(pair<string, string>(paper_key, author));
-			if (node_ids.left.find(author) == node_ids.left.end()) {
-				node_ids.insert(bm_type::value_type(author, node_cnt++));
-			}
-		}
-
-		//debug
-		if (node_cnt > NODE_LIMIT) break;
-	}
-	qDebug() << "* graph reading complete";
-	qDebug() << "* # of nodes: " << node_cnt;
-	qDebug() << "* # of edges: " << edges.size();
-
-	//edge conversion
-	//<string, string> to <int, int>
-	//using boost::bimap (bidirectional map)
-	for (auto edge : edges) {
-		edges_indexes.push_back({
-			node_ids.left.find(edge.first)->get_right(),
-			node_ids.left.find(edge.second)->get_right()
-		});
-	}
-	//Graph --> defined in "PaperGraphWidget.h"
-	Graph graph(edges_indexes.begin(), edges_indexes.end(), node_ids.size());
-
-	//set index property
-	qDebug() << "* set vertex property start";
-	typedef typename graph_traits<Graph>::edge_iterator edge_iterator;
-	typedef typename graph_traits<Graph>::vertex_iterator vertex_iterator;
-	vertex_iterator vi, vi_end;
-	int i = 0;
-	for (boost::tie(vi, vi_end)=vertices(graph); vi!=vi_end; ++vi) {
-		//Vertex Property 설정
-		//index: 0 ~ ...
-		//name : map의 value(i) 기준으로 찾은 Key
-		//		map --> map<string, int> (boost bidirectional map)
-		boost::put(vertex_index, graph, *vi, i);
-		boost::put(vertex_name, graph, *vi,
-			node_ids.right.find(i)->get_left());
-
-		++i;
-	}
-	qDebug() << "* set vertex property end";
-
-
-	//모든 edge weight 1로 만들기
-	//edge_iterator ei, ei_end;
-	//for (boost::tie(ei, ei_end)=boost::edges(graph); ei!=ei_end; ++ei) {
-	//	boost::put(edge_weight, graph, *ei, 1);
-	//}
-	////path finding between two vertices
-	////using dijkstra algorithm
-	////ex) "Werner Keim" ---> "Arpad L. Scholtz" (in dataset 2nd line)
-	//qDebug() << "* path finding start";
-	//typedef graph_traits<Graph>::vertex_descriptor vertex_descriptor;
-	//std::vector<vertex_descriptor> parent(num_vertices(graph));
-	//std::vector<int> distance(num_vertices(graph));
-	//int start_idx = node_ids.left.find("Werner Keim")->get_right();
-	//vertex_descriptor start_v = vertex(start_idx, graph);
-	//dijkstra_shortest_paths(
-	//	graph,
-	//	start_v,
-	//	predecessor_map(
-	//		boost::make_iterator_property_map(parent.begin(), get(boost::vertex_index, graph))
-	//	).distance_map(boost::make_iterator_property_map(distance.begin(), get(boost::vertex_index, graph)))
-	//);
-	//qDebug() << "* path finding end";
-
-
-	//graph layout calculation
-	//using boost::random_graph_layout and boost::kamada_kawai_spring_layout
-	//vertex마다 계산된 좌표를 property에 적용
-	//예제 코드: http://www.boost.org/doc/libs/1_63_0/libs/graph/test/layout_test.cpp
-	//(-> 콘솔 기반)
-	qDebug() << "* make graph layout start";
-	typedef square_topology<> Topology;
-	minstd_rand gen;
-	Topology topology(gen, (double)SCREEN_SIZE);
-	Topology::point_type origin;
-	origin[0] = origin[1] = (double)SCREEN_SIZE;
-	Topology::point_difference_type extent;
-	extent[0] = extent[1] = (double)SCREEN_SIZE;
-	rectangle_topology<> rect_top(gen,
-		-SCREEN_SIZE/2, -SCREEN_SIZE/2,
-		SCREEN_SIZE/2, SCREEN_SIZE/2);
-	
-	switch (LAYOUT_MODE) {
-	case GRAPH_LAYOUT::RANDOM_LAYOUT:
-		random_graph_layout(graph, get(vertex_position, graph), rect_top);
-		break;
-
-	case GRAPH_LAYOUT::CIRCLE_LAYOUT:
-		circle_graph_layout(graph, get(vertex_position, graph), SCREEN_SIZE/2);
-		break;
-
-	//case GRAPH_LAYOUT::KAMADA_KAWAI_LAYOUT:
-	//	kamada_kawai_spring_layout(graph,
-	//		get(vertex_position, graph),
-	//		get(edge_weight, graph),
-	//		topology,
-	//		side_length((double)SCREEN_SIZE)
-	//	);
-	//	break;
-
-	case GRAPH_LAYOUT::FRUCHTERMAN_REINGOLD_LAYOUT:
-		fruchterman_reingold_force_directed_layout(graph,
-			get(vertex_position, graph),
-			topology,
-			attractive_force(square_distance_attractive_force())
-			.cooling(linear_cooling<double>(50))
-		);
-		break;
-	}
-	qDebug() << "* make graph layout end";
-
-	return graph;
-}
 
 int main(int argc, char *argv[])
 {
 	QApplication app(argc, argv);
-	//app.setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
 	
 	PaperGraphWidget w;
 
 	try {
 		ifstream fin(PAPER_FILENAME);
-		w.print_graph(read_graph(fin));
+		w.print_graph(fin);
 		fin.close();
 	} catch (const std::exception& e) {
 		qDebug() << "Error: " << e.what();
 		return EXIT_FAILURE;
 	}
 
-
 	w.show();
 
 	return app.exec();