Hi Marcel, I updated a fresh Squeak5.1-15113 image.  After the update,
the scrolling jumps to a chunky 9 lines per tick, and Control+[Up
Arrow] or Control+[Down Arrow] seems to "triple scroll" for each press
-- as if I had pressed it three times...

Maybe the problems are related?

On Tue, Jun 7, 2016 at 1:25 AM, marcel.taeumel <Marcel.Taeumel at hpi.de> wrote:
> Chris Muller-3 wrote
>> It makes scrolling very choppy.  Instead of scrolling by 3-lines at a
>> time, it scrolls by about 10...
>>
>> Shouldn't "Send Mouse Wheel Events to Keyboard Focus" be controlled by
>> mouseOverForKeyboardFocus?
>>
>> On Mon, Jun 6, 2016 at 10:50 AM, marcel.taeumel &lt;
>
>> Marcel.Taeumel@
>
>> &gt; wrote:
>>> Hi, there.
>>>
>>> Here is a change set that adds MouseWheelEvent and everything related to
>>> it
>>> (including EventHandler):
>>> mouse-wheel-events.cs
>>> &lt;http://forum.world.st/file/n4899428/mouse-wheel-events.cs&gt;
>>>
>>> You have two new preferences (in "Morphic", "keyboard", "mouse"
>>> categories):
>>>
>>> [x] Synthesize Mouse Wheel Events from Keyboard Events
>>> [x] Send Mouse Wheel Events to Keyboard Focus
>>>
>>> Both are enabled by default.
>>>
>>> I refactored the old-style wheel scrolling to use an event filter in
>>> ScrollPane but this is regarded a fall-back only and can be used for old
>>> applications.
>>>
>>> The mouse wheel event synthesis is implemented as keyboard event capture
>>> filter in HandMorph itself. See the changeset's postload script or
>>> HandMorph
>>>>> #initForEvents. Once our VMs deliver real mouse wheel events, we can
>>> change that and adapt HandMorph >> #generateMouseEvent:.
>>>
>>> The preferences "Send Mouse Wheel Events to Keyboard Focus" can be used
>>> to
>>> switch between Windows and OS X behavior.
>>>
>>> Please, try it out.
>>>
>>> Best,
>>> Marcel
>>>
>>>
>>>
>>> --
>>> View this message in context:
>>> http://forum.world.st/Mouse-Wheel-Events-Point-and-scroll-by-wheel-tp4899428.html
>>> Sent from the Squeak - Dev mailing list archive at Nabble.com.
>>>
>
> Hi Chris,
>
> there should be no change in the observable behavior by this change. In my
> image, it still scrolls 3 text lines in a text morph and 3 items in a list
> morph. This is specified in ScrollPane >> #mouseWheel: (resp: ScrollPane >>
> #scrollByKeyboard:). Could you please inspect the vertical scrollbar of one
> text morph and one list morph and tell me the value of "scrollDelta"? And,
> if you have time, could you try it in a fresh Squeak Trunk image? You are
> working under Ubuntu Linux?
>
> If the preference #mouseOverForKeyboardFocus is enabled, "Send Mouse Wheel
> to Keyboard Focus" has no effect because the keyboard focus is always where
> the mouse cursor is. However, there are many users that do disable
> #mouseOverForKeyboardFocus and wished for the Mac behavior for a very long
> time. Bert, for example. Now, you can make scrolling by mouse wheel behave
> like on the Mac:
>
> [ ] mouseOverForKeyboardFocus
> [x] Send Mouse Wheel Events to Keyboard Focus
> [x] Synthesize Mouse Wheel Events from Keyboard Events
>
> Best,
> Marcel
>
>
>
> --
> View this message in context: http://forum.world.st/Mouse-Wheel-Events-Point-and-scroll-by-wheel-tp4899428p4899504.html
> Sent from the Squeak - Dev mailing list archive at Nabble.com.
>