add file open dialog

main.py

@@ -24,6 +24,10 @@ class MainWindow(QMainWindow):
         self.setDockNestingEnabled(True)
 
         self.tabs = self.create_tabs()
+        self.create_tab("/home/andi/ws/performanceDb/data/production/logs_2018-09-06_2018-09-06.csv")
+        self.create_tab("/home/andi/ws/ravenlog/example.log")
+
+
         self.setCentralWidget(self.tabs)
         self.main_tool_bar = self.create_main_tool_bar()
         self.addToolBar(self.main_tool_bar)
@@ -54,33 +58,43 @@ class MainWindow(QMainWindow):
         tabs = QTabWidget()
         tabs.setTabsClosable(True)
         tabs.tabCloseRequested.connect(lambda index: tabs.removeTab(index) )
-
-        model = LogFileModel("/home/andi/ws/ravenlog/example.log")
-        big_text = BigText(model, self.settings)
-        tabs.addTab(big_text, model.get_tab_name())
-
-
-        model = LogFileModel("/home/andi/ws/performanceDb/data/production/logs_2018-09-06_2018-09-06.csv")
-        big_text = BigText(model, self.settings)
-        tabs.addTab(big_text, model.get_tab_name())
-
         return tabs
 
+    def create_tab(self, file: str):
+        if not os.path.isfile(file):
+            message = QMessageBox(QMessageBox.Icon.Warning, "File not found", "'%s' is not a file or cannot be opened" % (file))
+            message.exec()
+            return
+
+        model = LogFileModel(file)
+        big_text = BigText(model, self.settings)
+        self.tabs.addTab(big_text, model.get_tab_name())
+        # open the new tab
+        self.tabs.setCurrentIndex(self.tabs.count()-1)
+
     def create_menu_bar(self) -> QMenuBar:
         menu_bar = QMenuBar()
 
         file_menu = QMenu(self.tr("File", "name of the file menu"), self)
+
+        open_file = QAction(self.tr("Open..."), self)
+        open_file.triggered.connect(self._open_file)
+
         close_action = QAction(self.tr("Close", "menu item to close the application"), self)
         close_action.triggered.connect(self.close)
 
+        file_menu.addAction(open_file)
         file_menu.addAction(close_action)
 
         menu_bar.addMenu(file_menu)
 
         return menu_bar
 
-    def onMyToolBarButtonClick(self, s) -> None:
-        print("click", s)
+    def _open_file(self) -> None:
+        dialog = QFileDialog(self)
+        (selected_file, _filter) = dialog.getOpenFileName(caption=self.tr("Open File"))
+        self.create_tab(selected_file)
+
 
 
 if __name__ == "__main__":