feat: AR-VMS-Seaman initial commit — Python FastAPI + PySide6 (runtime server + desktop studio client)

vmssailor/studio/main_window.py

@@ -20,6 +20,7 @@ from PySide6.QtWidgets import (
     QMessageBox,
     QPushButton,
     QSplitter,
+    QStackedWidget,
     QStatusBar,
     QTabWidget,
     QToolBar,
@@ -42,6 +43,7 @@ from vmssailor.studio.theme import (
 )
 from vmssailor.studio.widgets.system_sidebar import SystemSidebar
 from vmssailor.studio.widgets.vessel_canvas import VesselCanvas
+from vmssailor.studio.widgets.welcome_screen import WelcomeScreen
 from vmssailor.studio.wizard.wizard import VesselWizard
 
 logger = logging.getLogger(__name__)
@@ -119,7 +121,10 @@ class MainWindow(QMainWindow):
         self._topbar = bar
 
     def _build_central(self) -> None:
-        # Splitter horizontal: sidebar | canvas
+        # Welcome screen (visible al arrancar sin proyecto)
+        self._welcome = WelcomeScreen()
+
+        # Workspace splitter (visible cuando hay proyecto cargado)
         self._splitter = QSplitter(Qt.Horizontal)
         self._splitter.setHandleWidth(1)
         self._splitter.setChildrenCollapsible(False)
@@ -129,7 +134,6 @@ class MainWindow(QMainWindow):
         self._sidebar.setMinimumWidth(260)
         self._sidebar.setMaximumWidth(380)
 
-        # Right pane: vertical splitter with canvas on top + editor tabs below
         self._canvas = VesselCanvas()
         self._equipment_editor = EquipmentEditor()
         self._mimic_editor = MimicEditor()
@@ -153,13 +157,18 @@ class MainWindow(QMainWindow):
         self._splitter.addWidget(right_splitter)
         self._splitter.setSizes([280, 1160])
 
-        # Compose central widget: topbar (top) + splitter (rest)
+        # StackedWidget conmuta entre welcome y workspace
+        self._main_stack = QStackedWidget()
+        self._main_stack.addWidget(self._welcome)   # index 0
+        self._main_stack.addWidget(self._splitter)  # index 1
+
+        # Compose central widget: topbar (top) + stack (rest)
         wrapper = QWidget()
         outer = QVBoxLayout(wrapper)
         outer.setContentsMargins(0, 0, 0, 0)
         outer.setSpacing(0)
         outer.addWidget(self._topbar)
-        outer.addWidget(self._splitter, 1)
+        outer.addWidget(self._main_stack, 1)
         self.setCentralWidget(wrapper)
 
     def _build_statusbar(self) -> None:
@@ -254,6 +263,9 @@ class MainWindow(QMainWindow):
         self._equipment_editor.projectMutated.connect(self._on_project_mutated)
         self._tag_editor.projectMutated.connect(self._on_project_mutated)
         self._alarm_editor.projectMutated.connect(self._on_project_mutated)
+        # Welcome screen CTAs disparan las mismas acciones que el menú
+        self._welcome.newProjectRequested.connect(self.on_new_wizard)
+        self._welcome.openProjectRequested.connect(self.on_open)
 
     # ----- Slots --------------------------------------------------------
 
@@ -360,6 +372,8 @@ class MainWindow(QMainWindow):
         self._btn_save_top.setEnabled(has_project)
         self._btn_validate.setEnabled(has_project)
         self._btn_compile.setEnabled(has_project)
+        # Conmuta entre welcome screen (0) y workspace (1)
+        self._main_stack.setCurrentIndex(1 if has_project else 0)
         self._update_window_title()
         self._update_stats()
         if project is not None: