wrote viewmodel model for project browsing

app/widget/projectexplorer/projectexplorer.cpp

@@ -2,9 +2,11 @@
 
 ProjectExplorer::ProjectExplorer(QWidget *parent) :
   QStackedWidget(parent),
-  view_type_(TreeView)
+  view_type_(TreeView),
+  model_(this)
 {
   tree_view_ = new QTreeView(this);
+  tree_view_->setModel(&model_);
   addWidget(tree_view_);
 }
 
@@ -17,3 +19,13 @@ void ProjectExplorer::set_view_type(const ProjectExplorer::ViewType &type)
 {
   view_type_ = type;
 }
+
+Project *ProjectExplorer::project()
+{
+  return model_.project();
+}
+
+void ProjectExplorer::set_project(Project *p)
+{
+  model_.set_project(p);
+}