From bcc9dd1a0df795bc8c829a0a700e9601468c0058 Mon Sep 17 00:00:00 2001
From: Dylan Jeannin <dylanjeannin@gmail.com>
Date: Tue, 8 Sep 2026 14:02:53 +0200
Subject: [PATCH] View main window: keep zoom on the geographical graph after a
 change in the geometry

---
 src/View/MainWindowTabGraph.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/View/MainWindowTabGraph.py b/src/View/MainWindowTabGraph.py
index 8da4968a..5d4b9e15 100644
--- a/src/View/MainWindowTabGraph.py
+++ b/src/View/MainWindowTabGraph.py
@@ -27,6 +27,7 @@ class WidgetGraph(QWidget):
 
         self._study = study
         self._trad = trad
+        self._plot_river = None
 
         layout = QHBoxLayout(self)
         self._splitter = QSplitter(Qt.Horizontal, self)
@@ -87,6 +88,14 @@ class WidgetGraph(QWidget):
         )
 
     def update(self):
+        river = self._study.river if self._study is not None else None
+        view = None
+        if river is not None and river is self._plot_river:
+            axes = self.canvas.axes
+            if axes.has_data():
+                view = (axes.get_xlim(), axes.get_ylim(),
+                        axes.get_aspect(), axes.get_adjustable())
+
         self._update_graph_title()
         if (self._graph_widget is not None
             and (self._study is None
@@ -121,3 +130,10 @@ class WidgetGraph(QWidget):
             parent=self
         )
         self.plot.update()
+        self._plot_river = river
+        if view is not None:
+            x_limits, y_limits, aspect, adjustable = view
+            self.canvas.axes.set_aspect(aspect, adjustable=adjustable)
+            self.canvas.axes.set_xlim(x_limits)
+            self.canvas.axes.set_ylim(y_limits)
+            self.canvas.draw_idle()