From f5880d1b1a8fd268e660318e30f001af85a43148 Mon Sep 17 00:00:00 2001
From: Arda Aydin <arda.aydin@ontrol.com.tr>
Date: Tue, 6 Oct 2026 22:02:38 +0300
Subject: [PATCH] Wiresheet: mouse wheel scrolls the sheet, Shift + wheel
 scrolls sideways

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 app_state.py |  2 +-
 main.py      | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/app_state.py b/app_state.py
index 352bc9f..150851b 100644
--- a/app_state.py
+++ b/app_state.py
@@ -8,7 +8,7 @@ so later rebinding would only ever be seen by the module that did it.
 import configparser
 import os
 
-VERSION = "0.0.0.157"
+VERSION = "0.0.0.158"
 PROPERTIES_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "editor.properties")
 DEFAULT_GRID_SIZE = 10
 DEFAULT_ADD_TIMESTAMP = True
diff --git a/main.py b/main.py
index f224b3b..b74a411 100644
--- a/main.py
+++ b/main.py
@@ -903,6 +903,18 @@ def on_canvas_wheel_zoom(event):
     return "break"
 
 
+def on_canvas_wheel_scroll(event):
+    """Plain wheel pans the sheet up and down, Shift + wheel pans it sideways."""
+    if not event.delta:
+        return "break"
+    units = -1 if event.delta > 0 else 1
+    if event.state & 0x0001:
+        canvas.xview_scroll(units, "units")
+    else:
+        canvas.yview_scroll(units, "units")
+    return "break"
+
+
 # --- Event handlers ---
 
 def on_tree_select(event):
@@ -3364,6 +3376,12 @@ canvas.bind("<Double-1>", on_canvas_double_click)
 canvas.bind("<Control-MouseWheel>", on_canvas_wheel_zoom)
 canvas.bind("<Control-Button-4>", do_zoom_in)
 canvas.bind("<Control-Button-5>", do_zoom_out)
+canvas.bind("<MouseWheel>", on_canvas_wheel_scroll)
+canvas.bind("<Shift-MouseWheel>", on_canvas_wheel_scroll)
+canvas.bind("<Button-4>", lambda e: canvas.yview_scroll(-1, "units"))
+canvas.bind("<Button-5>", lambda e: canvas.yview_scroll(1, "units"))
+canvas.bind("<Shift-Button-4>", lambda e: canvas.xview_scroll(-1, "units"))
+canvas.bind("<Shift-Button-5>", lambda e: canvas.xview_scroll(1, "units"))
 
 paned_window.add(frame_editor, weight=3)