One attempt at making a new tab button

onionshare_gui/gui_common.py

@@ -50,6 +50,16 @@ class GuiCommon:
 
         self.css = {
             # OnionShareGui styles
+            "tab_bar_new_tab": """
+                QTabBar::tab:last {
+                    border: 0;
+                    margin: 3px;
+                }""",
+            "tab_bar_new_tab_button": """
+                QToolButton {
+                    font-weight: bold;
+                    font-size: 20px;
+                }""",
             "new_tab_button": """
                 QPushButton {
                     font-weight: bold;

onionshare_gui/main_window.py

@@ -97,10 +97,24 @@ class MainWindow(QtWidgets.QMainWindow):
 
         # Tabs
         self.tabs = QtWidgets.QTabWidget()
+        self.tabs.setStyleSheet(self.common.gui.css["tab_bar_new_tab"])
+        self.tabs.setMovable(True)
+        self.tabs.setTabsClosable(True)
+        self.tabs.setUsesScrollButtons(True)
 
-        # Start with one tab
+        # New tab button
-        self.tab = Tab(self.common, self.system_tray, self.status_bar, filenames)
+        new_tab_button = QtWidgets.QToolButton()
-        self.tabs.addTab(self.tab, "New Tab")
+        new_tab_button.setStyleSheet(self.common.gui.css["tab_bar_new_tab_button"])
+        new_tab_button.setText("+")
+        new_tab_button.setAutoRaise(True)
+        self.tabs.insertTab(0, QtWidgets.QWidget(), "")
+        self.tabs.tabBar().setTabButton(0, QtWidgets.QTabBar.RightSide, new_tab_button)
+        self.tabs.tabBar().setTabToolTip(0, strings._("gui_new_tab_tooltip"))
+
+        # Start with a tab
+        new_tab = Tab(self.common, self.system_tray, self.status_bar, filenames)
+        self.tabs.insertTab(0, new_tab, strings._("gui_new_tab"))
+        self.tabs.setCurrentIndex(0)
 
         # Layout
         layout = QtWidgets.QVBoxLayout()

share/locale/en.json

@@ -180,6 +180,8 @@
     "hours_first_letter": "h",
     "minutes_first_letter": "m",
     "seconds_first_letter": "s",
+    "gui_new_tab": "New Tab",
+    "gui_new_tab_tooltip": "Open a new tab",
     "gui_new_tab_share_button": "Share Files",
     "gui_new_tab_share_description": "Choose files on your computer to send to someone else. The person or people who you want to send files to will need to use Tor Browser to download them from you.",
     "gui_new_tab_receive_button": "Receive Files",