Assign editor->map to nullptr after clearing map cache

include/mainwindow.h

@@ -128,6 +128,7 @@ private slots:
     void onWildMonDataChanged();
     void openNewMapPopupWindow(int, QVariant);
     void onNewMapCreated();
+    void onMapCacheCleared();
 
     void on_action_NewMap_triggered();
     void on_actionNew_Tileset_triggered();

include/project.h

@@ -219,6 +219,7 @@ private:
 signals:
     void reloadProject();
     void uncheckMonitorFilesAction();
+    void mapCacheCleared();
 };
 
 #endif // PROJECT_H

src/mainwindow.cpp

@@ -326,6 +326,7 @@ bool MainWindow::openProject(QString dir) {
         editor->closeProject();
         editor->project = new Project(this);
         QObject::connect(editor->project, SIGNAL(reloadProject()), this, SLOT(on_action_Reload_Project_triggered()));
+        QObject::connect(editor->project, SIGNAL(mapCacheCleared()), this, SLOT(onMapCacheCleared()));
         QObject::connect(editor->project, &Project::uncheckMonitorFilesAction, [this] () { ui->actionMonitor_Project_Files->setChecked(false); });
         on_actionMonitor_Project_Files_triggered(porymapConfig.getMonitorFiles());
         editor->project->set_root(dir);
@@ -2217,6 +2218,10 @@ void MainWindow::onMapNeedsRedrawing() {
     redrawMapScene();
 }
 
+void MainWindow::onMapCacheCleared() {
+    editor->map = nullptr;
+}
+
 void MainWindow::onTilesetsSaved(QString primaryTilesetLabel, QString secondaryTilesetLabel) {
     this->editor->updatePrimaryTileset(primaryTilesetLabel, true);
     this->editor->updateSecondaryTileset(secondaryTilesetLabel, true);

src/project.cpp

@@ -143,6 +143,7 @@ void Project::clearMapCache() {
         Map *map = mapCache->take(mapName);
         if (map) delete map;
     }
+    emit mapCacheCleared();
 }
 
 void Project::clearTilesetCache() {