Autoscrolling (in FastTable)

> Today we've had a design discussion on slack on autoscrolling with
> Morphic. The idea is to start scrolling up or down when drag-holding
> over a table. A similar approach should hold for scrolling panes.
>
> It started with me describing a working but not so nice approach
> starting stepping on #mouseEnterDragging:, checking the global hand
> position and button state in each #step:, stopping the stepping on
> #mouseLeaveDragging: or #mouseUp:.
>
> Thierry noticed the #newMouseFocus: taking of FastTable on
> #mouseEnterDragging: causes problems when dragging from one table to
> itself without leaving the table bounds.
>
> Henrik then wrote the code for FastTable, removing the mouse focus
> taking by adapting #handleMouseMove: The first results are in the
> latest version of FastTable on estebanlm/FastTable.
> The top and bottom parts of the table will now start scrolling the
> table rows when drag-holding over them.
>
> Further possible improvements:
> - expand/contract tree triangles when holding over them, taking
> priority over the start of autoscrolling;
> - adapt scrolling speed depending on distance from border
> - check starting delay, repeat rate and smoothness of the scrolling
>
> Stephan
>
>
>
>

> This is cool to see such important widgets improving.
>
> Stef
>
> Le 26/11/15 17:28, Stephan Eggermont a écrit :
>> Today we've had a design discussion on slack on autoscrolling with
>> Morphic. The idea is to start scrolling up or down when drag-holding
>> over a table. A similar approach should hold for scrolling panes.
>>
>> It started with me describing a working but not so nice approach
>> starting stepping on #mouseEnterDragging:, checking the global hand
>> position and button state in each #step:, stopping the stepping on
>> #mouseLeaveDragging: or #mouseUp:.
>>
>> Thierry noticed the #newMouseFocus: taking of FastTable on
>> #mouseEnterDragging: causes problems when dragging from one table to
>> itself without leaving the table bounds.
>>
>> Henrik then wrote the code for FastTable, removing the mouse focus
>> taking by adapting #handleMouseMove: The first results are in the
>> latest version of FastTable on estebanlm/FastTable.
>> The top and bottom parts of the table will now start scrolling the
>> table rows when drag-holding over them.
>>
>> Further possible improvements:
>> - expand/contract tree triangles when holding over them, taking
>> priority over the start of autoscrolling;
>> - adapt scrolling speed depending on distance from border
>> - check starting delay, repeat rate and smoothness of the scrolling
>>
>> Stephan
>>
>>
>>
>>
>
>
>

> Yes, this was very interesting. Some of the things we got:
>
> - mouseFocus is in fact more usefull than it seems at first,
> especially if you want to receive events when the mouse doesn't move.
> In particular, it is usefull to know how to get mouseStillDown: events
> (they are sent as soon as the mouse pointer stops moving during a
> drag, but only if you have the mouse focus).
>
> - we should unify alarms and stepMessages. This would make some
> time-based behaviors a lot easier to code, not requiring the addition
> of an instance variable to hold the number of times the step message
> has been sent.

>
> - FastTable could get an insertion point: a blue line where an item
> would be inserted if dropped.
>
> - It is possible, and relatively easy in the current Morphic
> framework, to do the following:
>   - auto-scrolling accelerating the longer you stay with your drag
> either on top or at the bottom of the table.
>   - have a time-threshold to automatically expand tree items
> (triangles) when you drag
>   - accelerate and slow down mouse wheel based scrolling on long lists
> (also applies to two-finger scrolling on trackpads), like it is done
> on our phones :)
>
> Thierry
>
>
> Le 28/11/2015 12:09, stepharo a écrit :
>> This is cool to see such important widgets improving.
>>
>> Stef
>>
>> Le 26/11/15 17:28, Stephan Eggermont a écrit :
>>> Today we've had a design discussion on slack on autoscrolling with
>>> Morphic. The idea is to start scrolling up or down when drag-holding
>>> over a table. A similar approach should hold for scrolling panes.
>>>
>>> It started with me describing a working but not so nice approach
>>> starting stepping on #mouseEnterDragging:, checking the global hand
>>> position and button state in each #step:, stopping the stepping on
>>> #mouseLeaveDragging: or #mouseUp:.
>>>
>>> Thierry noticed the #newMouseFocus: taking of FastTable on
>>> #mouseEnterDragging: causes problems when dragging from one table to
>>> itself without leaving the table bounds.
>>>
>>> Henrik then wrote the code for FastTable, removing the mouse focus
>>> taking by adapting #handleMouseMove: The first results are in the
>>> latest version of FastTable on estebanlm/FastTable.
>>> The top and bottom parts of the table will now start scrolling the
>>> table rows when drag-holding over them.
>>>
>>> Further possible improvements:
>>> - expand/contract tree triangles when holding over them, taking
>>> priority over the start of autoscrolling;
>>> - adapt scrolling speed depending on distance from border
>>> - check starting delay, repeat rate and smoothness of the scrolling
>>>
>>> Stephan
>>>
>>>
>>>
>>>
>>
>>
>>
>
>
>

>
>
> Le 28/11/15 18:32, Thierry Goubier a écrit :
>> Le 28/11/2015 18:24, stepharo a écrit :
>>> We are working on Bloc so I would not invest too much improving
>>> dramatically Morphic.
>>
>> Most of what is being done will port to Bloc. No improvements of
>> Morphic are considered; just using it correctly.
>
> then supercool :)