Check for unsaved changes before changing area/world

src/Editor/CStartWindow.cpp

@@ -33,12 +33,15 @@ void CStartWindow::on_actionOpen_MLVL_triggered()
     QString WorldFile = QFileDialog::getOpenFileName(this, "Open MLVL", "", "Metroid Prime World (*.MLVL)");
     if (WorldFile.isEmpty()) return;
 
+    if (mpWorldEditor->CheckUnsavedChanges())
+    {
         gResCache.SetFolder(TString(WorldFile.toStdString()).GetFileDirectory());
         mpWorld = gResCache.GetResource(WorldFile.toStdString());
         mpWorldEditor->close();
 
         FillWorldUI();
     }
+}
 
 void CStartWindow::FillWorldUI()
 {
@@ -155,6 +158,8 @@ void CStartWindow::on_AttachedAreasList_doubleClicked(const QModelIndex &index)
 }
 
 void CStartWindow::on_LaunchWorldEditorButton_clicked()
+{
+    if (mpWorldEditor->CheckUnsavedChanges())
     {
         u64 AreaID = mpWorld->GetAreaResourceID(mSelectedAreaIndex);
         TResPtr<CGameArea> pArea = gResCache.GetResource(AreaID, "MREA");
@@ -162,7 +167,6 @@ void CStartWindow::on_LaunchWorldEditorButton_clicked()
         if (!pArea)
         {
             QMessageBox::warning(this, "Error", "Couldn't load area!");
-        mpWorldEditor->close();
         }
 
         else
@@ -178,10 +182,11 @@ void CStartWindow::on_LaunchWorldEditorButton_clicked()
 
             if (HasErrors)
                 ErrorDialog.exec();
-    }
 
             gResCache.Clean();
         }
+    }
+}
 
 void CStartWindow::on_actionLaunch_model_viewer_triggered()
 {

src/Editor/WorldEditor/CWorldEditor.cpp

@@ -89,21 +89,7 @@ CWorldEditor::~CWorldEditor()
 
 void CWorldEditor::closeEvent(QCloseEvent *pEvent)
 {
-    bool ShouldClose = true;
-
-    if (isWindowModified())
-    {
-        int Result = QMessageBox::warning(this, "Save", "You have unsaved changes. Save?", QMessageBox::Yes, QMessageBox::No, QMessageBox::Cancel);
-
-        if (Result == QMessageBox::Yes)
-            ShouldClose = Save();
-
-        else if (Result == QMessageBox::No)
-            ShouldClose = true;
-
-        else if (Result == QMessageBox::Cancel)
-            ShouldClose = false;
-    }
+    bool ShouldClose = CheckUnsavedChanges();
 
     if (ShouldClose)
     {
@@ -198,6 +184,28 @@ CGameArea* CWorldEditor::ActiveArea()
     return mpArea;
 }
 
+bool CWorldEditor::CheckUnsavedChanges()
+{
+    // Check whether the user has unsaved changes, return whether it's okay to clear the scene
+    bool OkToClear = !isWindowModified();
+
+    if (!OkToClear)
+    {
+        int Result = QMessageBox::warning(this, "Save", "You have unsaved changes. Save?", QMessageBox::Yes, QMessageBox::No, QMessageBox::Cancel);
+
+        if (Result == QMessageBox::Yes)
+            OkToClear = Save();
+
+        else if (Result == QMessageBox::No)
+            OkToClear = true;
+
+        else if (Result == QMessageBox::Cancel)
+            OkToClear = false;
+    }
+
+    return OkToClear;
+}
+
 // ************ PUBLIC SLOTS ************
 bool CWorldEditor::Save()
 {

src/Editor/WorldEditor/CWorldEditor.h

@@ -44,6 +44,7 @@ public:
     bool eventFilter(QObject *pObj, QEvent *pEvent);
     void SetArea(CWorld *pWorld, CGameArea *pArea, u32 AreaIndex);
     CGameArea* ActiveArea();
+    bool CheckUnsavedChanges();
 
 public slots:
     bool Save();