Design main window: New tab with network of the study

src/View/MainWindow.py

@@ -61,6 +61,7 @@ from View.WaitingDialog import WaitingDialog
 
 from View.MainWindowTabInfo import WidgetInfo
 from View.MainWindowTabChecker import WidgetChecker
+from View.MainWindowTabGraph import WidgetGraph
 
 from View.Configure.Window import ConfigureWindow
 from View.Study.Window import NewStudyWindow
@@ -235,6 +236,7 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
 
     def setup_tab(self):
         self.setup_tab_info()
+        self.setup_tab_graph()
         self.setup_tab_checker()
 
     def setup_tab_info(self):
@@ -261,6 +263,18 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
             self._trad["tab_checker_name"]
         )
 
+    def setup_tab_graph(self):
+        tab_widget = self.findChild(QTabWidget, "tabWidget")
+
+        self._tab_widget_graph = WidgetGraph(
+            study=self._study, trad=self._trad, parent=self
+        )
+
+        tab_widget.addTab(
+            self._tab_widget_graph,
+            self._trad["tab_graph_name"]
+        )
+
     def enable_actions(self, action: str, enable: bool):
         """Enable of disable an action componant
 
@@ -545,6 +559,7 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
             self._do_propagate_update_rec(window, keys)
 
         self._tab_widget_checker.update(modules=keys)
+        self._tab_widget_graph.update()
 
     def _do_propagate_update_info_tab(self, keys):
         modules = Modules.modelling_list()
@@ -570,6 +585,10 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
             self._tab_widget_info.study = self._study
             self._tab_widget_info.update()
 
+        if self._tab_widget_graph.study != self._study:
+            self._tab_widget_graph.study = self._study
+            self._tab_widget_graph.update()
+
         if self._tab_widget_checker.study != self._study:
             self._tab_widget_checker.study = self._study
             self._tab_widget_checker.update(modules=Modules.STUDY)

src/View/MainWindowTabGraph.py

@@ -0,0 +1,92 @@
+# MainWindowTabGraph.py -- Pamhyr
+# Copyright (C) 2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# -*- coding: utf-8 -*-
+
+from View.Tools.Plot.PamhyrCanvas import MplCanvas
+from View.Tools.Plot.PamhyrToolbar import PamhyrPlotToolbar
+from View.PlotXY import PlotXY
+from View.Network.GraphWidget import GraphWidget
+
+from PyQt5.QtWidgets import QWidget, QHBoxLayout, QVBoxLayout
+
+
+class WidgetGraph(QWidget):
+    """Read-only network graph displayed in the main window."""
+
+    def __init__(self, study=None, trad=None, parent=None):
+        super(WidgetGraph, self).__init__(parent)
+
+        self._study = study
+        self._trad = trad
+
+        layout = QHBoxLayout(self)
+        self._graph_widget = None
+
+        self._graph_layout = QVBoxLayout()
+        layout.addLayout(self._graph_layout, 1)
+
+        self.canvas = MplCanvas(width=5, height=4, dpi=100)
+        self.canvas.setObjectName("canvas_graph")
+        self.toolbar = PamhyrPlotToolbar(
+            self.canvas, self,
+            items=["home", "zoom", "save", "iso", "back/forward", "move"]
+        )
+        self._plot_layout = QVBoxLayout()
+        self._plot_layout.addWidget(self.toolbar)
+        self._plot_layout.addWidget(self.canvas)
+        layout.addLayout(self._plot_layout, 1)
+
+        self.plot = PlotXY(
+            canvas=self.canvas,
+            data=None,
+            trad=self._trad,
+            toolbar=self.toolbar,
+            parent=self
+        )
+
+    @property
+    def study(self):
+        return self._study
+
+    @study.setter
+    def study(self, study):
+        self._study = study
+
+    def update(self):
+        if (self._graph_widget is not None
+            and (self._study is None
+                 or self._graph_widget.graph is not self._study.river)):
+            self._graph_layout.removeWidget(self._graph_widget)
+            self._graph_widget.deleteLater()
+            self._graph_widget = None
+
+        if self._study is not None and self._graph_widget is None:
+            self._graph_widget = GraphWidget(
+                self._study.river,
+                parent=self,
+                only_display=True,
+                trad=self._trad,
+            )
+            self._graph_layout.addWidget(self._graph_widget)
+
+        data = None
+        geotiff = None
+        if self._study is not None:
+            data = self._study.river.enable_edges()
+            geotiff = self._study.river.geotiff
+
+        self.plot = PlotXY(
+            canvas=self.canvas,
+            data=data,
+            geotiff=geotiff,
+            trad=self._trad,
+            toolbar=self.toolbar,
+            parent=self
+        )
+        self.plot.update()

src/View/Translate.py

@@ -175,6 +175,9 @@ class MainTranslate(UnitTranslate):
         self._dict["tab_checker_name"] = _translate(
             "MainWindow", "Checks"
         )
+        self._dict["tab_graph_name"] = _translate(
+            "MainWindow", "Graph"
+        )
 
         self._dict["open_debug"] = _translate(
             "MainWindow", "Open debug window"