Refactor: Group main window initialization on opening project

For #168

Author: svetter

src/main/main_window.cpp

@@ -96,13 +96,7 @@ MainWindow::MainWindow() :
 	// Open database
 	QString lastOpen = Settings::lastOpenDatabaseFile.get();
 	if (!lastOpen.isEmpty() && QFile(lastOpen).exists()) {
-		setWindowTitleFilename(lastOpen);
-		db.openExisting(this, lastOpen);
-		updateFilters();
-		setVisible(true);
-		initCompositeBuffers();
-		updateTableSize();
-		setUIEnabled(true);
+		attemptToOpenFile(lastOpen);
 	}
 
 
@@ -449,6 +443,26 @@ void MainWindow::updateContextMenuEditIcon()
 
 // PROJECT SETUP
 
+/**
+ * Attempts to open the given file and only changes UI if database initialization is successful.
+ * 
+ * @param filepath	The file to attempt to open.
+ */
+void MainWindow::attemptToOpenFile(const QString& filepath)
+{
+	bool dbOpened = db.openExisting(this, filepath);
+	
+	if (dbOpened) {
+		setWindowTitleFilename(filepath);
+		updateFilters();
+		setVisible(true);
+		initCompositeBuffers();
+		updateTableSize();
+		setUIEnabled(true);
+		addToRecentFilesList(filepath);
+	}
+}
+
 /**
  * Prepares the composite tables and fills either all of them or only the one currently being
  * shown, with a status bar progress dialog.
@@ -953,14 +967,7 @@ void MainWindow::handle_openDatabase()
 
 	handle_closeDatabase();
 
-	setWindowTitleFilename(filepath);
-	db.openExisting(this, filepath);
-	updateFilters();
-	initCompositeBuffers();
-	updateTableSize();
-	setUIEnabled(true);
-	
-	addToRecentFilesList(filepath);
+	attemptToOpenFile(filepath);
 }
 
 /**
@@ -980,14 +987,7 @@ void MainWindow::handle_openRecentDatabase(QString filepath)
 
 	handle_closeDatabase();
 
-	setWindowTitleFilename(filepath);
-	db.openExisting(this, filepath);
-	updateFilters();
-	initCompositeBuffers();
-	updateTableSize();
-	setUIEnabled(true);
-	
-	addToRecentFilesList(filepath);
+	attemptToOpenFile(filepath);
 }
 
 /**

src/main/main_window.h

@@ -96,6 +96,7 @@ class MainWindow : public QMainWindow, public Ui_MainWindow
 	void updateContextMenuEditIcon();
 
 	// Project setup (on load)
+	void attemptToOpenFile(const QString& filepath);
 	void initCompositeBuffers();
 
 	// UI updates