fix: memory leak involving ExplorerModel

editor/mainwindow.cpp

@@ -83,9 +83,7 @@ MainWindow::MainWindow(QWidget *parent)
         if (!path) return;
         std::shared_ptr<DataModel> newModel = DataModel::LoadFromFile(path.value());
         dataModel = newModel;
-        delete ui->explorerView->selectionModel();
-        ui->explorerView->reset();
-        ui->explorerView->setModel(new ExplorerModel(dataModel));
+        ui->explorerView->updateRoot(newModel);
     });
 
     connect(ui->actionDelete, &QAction::triggered, this, [&]() {

editor/panes/explorermodel.cpp

@@ -234,6 +234,12 @@ bool ExplorerModel::dropMimeData(const QMimeData *data, Qt::DropAction action, i
     return true;
 }
 
+void ExplorerModel::updateRoot(InstanceRef newRoot) {
+    beginResetModel();
+    rootItem = newRoot;
+    endResetModel();
+}
+
 QMimeData* ExplorerModel::mimeData(const QModelIndexList& indexes) const {
     // application/x-openblocks-instance-pointers
     DragDropSlot* slot = new DragDropSlot();

editor/panes/explorermodel.h

@@ -1,18 +1,12 @@
 #pragma once
 
 #include "objects/base/instance.h"
-#include "objects/part.h"
 #include "qabstractitemmodel.h"
 #include "qevent.h"
-#include "qmenu.h"
 #include "qnamespace.h"
-#include "qtreeview.h"
 #include <QOpenGLWidget>
 #include <QWidget>
-#include <memory>
 
-// #ifndef EXPLORERMODEL_H
-// #define EXPLORERMODEL_H
 
 class ExplorerModel : public QAbstractItemModel {
     Q_OBJECT
@@ -42,6 +36,8 @@ public:
     Qt::DropActions supportedDropActions() const override;
     InstanceRef fromIndex(const QModelIndex index) const;
     QModelIndex ObjectToIndex(InstanceRef item);
+
+    void updateRoot(InstanceRef newRoot);
 private:
     InstanceRef rootItem;
     QModelIndex toIndex(InstanceRef item);

editor/panes/explorerview.cpp

@@ -73,7 +73,6 @@ void ExplorerView::keyPressEvent(QKeyEvent* event) {
     }
 }
 
-
 void ExplorerView::buildContextMenu() {
     contextMenu.addAction(M_mainWindow->ui->actionDelete);
     contextMenu.addSeparator();
@@ -84,4 +83,8 @@ void ExplorerView::buildContextMenu() {
     contextMenu.addSeparator();
     contextMenu.addAction(M_mainWindow->ui->actionSaveModel);
     contextMenu.addAction(M_mainWindow->ui->actionInsertModel);
+}
+
+void ExplorerView::updateRoot(InstanceRef newRoot) {
+    model.updateRoot(newRoot);
 }

editor/panes/explorerview.h

@@ -22,6 +22,7 @@ public:
     // void dropEvent(QDropEvent*) override;
 
     void buildContextMenu();
+    void updateRoot(InstanceRef newRoot);
 private:
     ExplorerModel model;
     QMenu contextMenu;