bpo-37902: IDLE: Add scrolling for IDLE browsers. (#15368)
Modify the wheel event handler so it can also be used for module, path, and stack browsers.
Patch by George Zhang.
diff --git a/Lib/idlelib/editor.py b/Lib/idlelib/editor.py
index 793ed3a..5cbf704 100644
--- a/Lib/idlelib/editor.py
+++ b/Lib/idlelib/editor.py
@@ -26,6 +26,7 @@
from idlelib import query
from idlelib import replace
from idlelib import search
+from idlelib.tree import wheel_event
from idlelib import window
# The default tab setting for a Text widget, in average-width characters.
@@ -151,9 +152,10 @@
else:
# Elsewhere, use right-click for popup menus.
text.bind("<3>",self.right_menu_event)
- text.bind('<MouseWheel>', self.mousescroll)
- text.bind('<Button-4>', self.mousescroll)
- text.bind('<Button-5>', self.mousescroll)
+
+ text.bind('<MouseWheel>', wheel_event)
+ text.bind('<Button-4>', wheel_event)
+ text.bind('<Button-5>', wheel_event)
text.bind('<Configure>', self.handle_winconfig)
text.bind("<<cut>>", self.cut)
text.bind("<<copy>>", self.copy)
@@ -502,23 +504,6 @@
self.text.yview(event, *args)
return 'break'
- def mousescroll(self, event):
- """Handle scrollwheel event.
-
- For wheel up, event.delta = 120*n on Windows, -1*n on darwin,
- where n can be > 1 if one scrolls fast. Flicking the wheel
- generates up to maybe 20 events with n up to 10 or more 1.
- Macs use wheel down (delta = 1*n) to scroll up, so positive
- delta means to scroll up on both systems.
-
- X-11 sends Control-Button-4 event instead.
- """
- up = {EventType.MouseWheel: event.delta > 0,
- EventType.Button: event.num == 4}
- lines = -5 if up[event.type] else 5
- self.text.yview_scroll(lines, 'units')
- return 'break'
-
rmenu = None
def right_menu_event(self, event):