From 4834fea6adbeb41898c40c0bd96ece61f7846460 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Fri, 15 Aug 2025 02:38:58 +0000
Subject: [PATCH] feat: Display variable values in VarListWidget

This commit introduces a feature to display the values of each variable in the `VarListWidget` corresponding to the current time, as indicated by the plot cursor.

- A "Show values" checkbox has been added to the `DataFileWidget` to toggle this functionality.
- The `DataModel` has been extended to track the current tick and whether to display values. The `data()` method now formats the display string to include the variable's value when the feature is enabled.
- Signal/slot connections have been added to propagate the cursor's tick from the `PlotManager` to the `DataModel` and to update the view when the cursor moves or the checkbox state changes.
---
 data_file_widget.py | 14 +++++++++++++-
 data_model.py       | 25 ++++++++++++++++++++++---
 main.py             |  1 +
 var_list_widget.py  |  8 ++++++++
 4 files changed, 44 insertions(+), 4 deletions(-)

diff --git a/data_file_widget.py b/data_file_widget.py
index e607fed..17ae106 100644
--- a/data_file_widget.py
+++ b/data_file_widget.py
@@ -104,7 +104,14 @@ def update_checkbox_state():
         # Set callback in the model so it can update the checkbox
         var_list.model()._checkbox_update_callback = update_checkbox_state
 
-        tab_layout.addWidget(derived_checkbox)
+        checkbox_layout = QHBoxLayout()
+        checkbox_layout.addWidget(derived_checkbox)
+
+        show_values_checkbox = QCheckBox("Show values")
+        show_values_checkbox.toggled.connect(var_list.set_show_values)
+        checkbox_layout.addWidget(show_values_checkbox)
+
+        tab_layout.addLayout(checkbox_layout)
         tab_layout.addWidget(var_list)
 
         tab_name = os.path.basename(filepath)
@@ -158,6 +165,11 @@ def get_time(self, idx=0):
             return None
         return self.get_data_file(idx).time
 
+    def update_tick(self, tick):
+        active_widget = self.get_active_data_file()
+        if active_widget:
+            active_widget.update_tick(tick)
+
     @pyqtSlot(QPoint)
     def on_context_menu_request(self, pos):
         # We only want to bring up the context menu when an actual tab is right-clicked. Check that
diff --git a/data_model.py b/data_model.py
index 9c4f9c8..95be7e1 100644
--- a/data_model.py
+++ b/data_model.py
@@ -69,6 +69,8 @@ def __init__(self, data_loader, parent=None):
         logger.info(f"Loaded {data_loader.source} which has a dt of {self._avg_dt:.6f} sec and a sampling rate of {freq} Hz")
 
         self._time_offset = 0
+        self._current_tick = 0
+        self._show_values = False
 
     @property
     def time(self):
@@ -103,16 +105,33 @@ def avg_dt(self):
     def set_time_offset(self, time_offset):
         self._time_offset = time_offset
 
+    def set_current_tick(self, tick):
+        self._current_tick = tick
+
+    def set_show_values(self, show):
+        self._show_values = show
+
     def rowCount(self, parent=QModelIndex()):
         return len(self._data)
 
     def data(self, index, role):
         if role == Qt.DisplayRole:
             item = self._data[index.row()]
-            return QVariant(item.var_name)
+            var_name = item.var_name
+
+            if self._show_values and not isinstance(item, SeparatorItem):
+                try:
+                    value = item.data[self._current_tick]
+                    if isinstance(value, (float, np.floating)):
+                        display_text = f"{var_name}: {value:.4f}"
+                    else:
+                        display_text = f"{var_name}: {value}"
+                    return QVariant(display_text)
+                except IndexError:
+                    return QVariant(f"{var_name}: N/A")
+
+            return QVariant(var_name)
         elif role == Qt.UserRole:
-            # print(type(index))
-            # print(type(index.row()))
             return self._data[index.row()]
         elif role == Qt.ForegroundRole:
             item = self._data[index.row()]
diff --git a/main.py b/main.py
index 23697b8..31515b7 100755
--- a/main.py
+++ b/main.py
@@ -107,6 +107,7 @@ def __init__(self):
         tick_time_indicator = TimeTickWidget()
         self.plot_manager.tickValueChanged.connect(tick_time_indicator.update_tick)
         self.plot_manager.timeValueChanged.connect(tick_time_indicator.update_time)
+        self.plot_manager.tickValueChanged.connect(self.data_file_widget.update_tick)
         self.statusBar().addPermanentWidget(tick_time_indicator)
 
         self._settings = QSettings()
diff --git a/var_list_widget.py b/var_list_widget.py
index 57c0de6..1dca667 100644
--- a/var_list_widget.py
+++ b/var_list_widget.py
@@ -59,6 +59,14 @@ def set_time_offset(self, time_offset):
         self.model().set_time_offset(time_offset)
         self.timeChanged.emit()
 
+    def set_show_values(self, show):
+        self.model().set_show_values(show)
+        self.model().layoutChanged.emit()
+
+    def update_tick(self, tick):
+        self.model().set_current_tick(tick)
+        self.model().layoutChanged.emit()
+
     def close(self):
         self.onClose.emit()
         return super().close()