UI: add layout save/restore

src/main/python/keyboard_container.py

@@ -151,3 +151,10 @@ class KeyboardContainer(QWidget):
                 self.selected_col = col
                 break
         self.refresh_layer_display()
+
+    def save_layout(self):
+        return self.keyboard.save_layout()
+
+    def restore_layout(self, data):
+        self.keyboard.restore_layout(data)
+        self.refresh_layer_display()

src/main/python/main_window.py

@@ -1,7 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 from PyQt5.QtCore import Qt
-from PyQt5.QtWidgets import QWidget, QComboBox, QToolButton, QHBoxLayout, QVBoxLayout
+from PyQt5.QtWidgets import QWidget, QComboBox, QToolButton, QHBoxLayout, QVBoxLayout, QMainWindow, QAction, qApp, \
+    QFileDialog, QDialog
 
 from keyboard import Keyboard
 from keyboard_container import KeyboardContainer
@@ -10,7 +11,7 @@ from tabbed_keycodes import TabbedKeycodes
 from util import tr, find_vial_keyboards, open_device
 
 
-class MainWindow(QWidget):
+class MainWindow(QMainWindow):
 
     def __init__(self):
         super().__init__()
@@ -39,11 +40,54 @@ class MainWindow(QWidget):
         layout.addLayout(layout_combobox)
         layout.addWidget(self.keyboard_container)
         layout.addWidget(self.tabbed_keycodes)
-        self.setLayout(layout)
+        w = QWidget()
+        w.setLayout(layout)
+        self.setCentralWidget(w)
+
+        self.init_menu()
 
         # make sure initial state is valid
         self.on_click_refresh()
 
+    def init_menu(self):
+        layout_load_act = QAction(tr("MenuFile", "Load saved layout"), self)
+        layout_load_act.setShortcut("Ctrl+O")
+        layout_load_act.triggered.connect(self.on_layout_load)
+
+        layout_save_act = QAction(tr("MenuFile", "Save current layout"), self)
+        layout_save_act.setShortcut("Ctrl+S")
+        layout_save_act.triggered.connect(self.on_layout_save)
+
+        exit_act = QAction(tr("MenuFile", "Exit"), self)
+        exit_act.setShortcut("Ctrl+Q")
+        exit_act.triggered.connect(qApp.exit)
+
+        menubar = self.menuBar()
+        file_menu = self.menuBar().addMenu(tr("Menu", "File"))
+        file_menu.addAction(layout_load_act)
+        file_menu.addAction(layout_save_act)
+        file_menu.addSeparator()
+        file_menu.addAction(exit_act)
+
+    def on_layout_load(self):
+        dialog = QFileDialog()
+        dialog.setDefaultSuffix("vil")
+        dialog.setAcceptMode(QFileDialog.AcceptOpen)
+        dialog.setNameFilters(["Vial layout (*.vil)"])
+        if dialog.exec_() == QDialog.Accepted:
+            with open(dialog.selectedFiles()[0], "rb") as inf:
+                data = inf.read()
+            self.keyboard_container.restore_layout(data)
+
+    def on_layout_save(self):
+        dialog = QFileDialog()
+        dialog.setDefaultSuffix("vil")
+        dialog.setAcceptMode(QFileDialog.AcceptSave)
+        dialog.setNameFilters(["Vial layout (*.vil)"])
+        if dialog.exec_() == QDialog.Accepted:
+            with open(dialog.selectedFiles()[0], "wb") as outf:
+                outf.write(self.keyboard_container.save_layout())
+
     def on_click_refresh(self):
         self.devices = find_vial_keyboards()
         self.combobox_devices.clear()