bugFreeciv - Bugs: bug #21803, Map canvas sliding after...

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bug #21803: Map canvas sliding after reconnecting

Submitted by:  Marko Lindqvist <cazfi>
Submitted on:  Sun 16 Mar 2014 12:35:32 PM UTC  
Category: NoneSeverity: 3 - Normal
Priority: 5 - NormalStatus: None
Assigned to: NoneOpen/Closed: Open
Release: Operating System: None
Planned Release: 

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Sun 16 Mar 2014 12:35:32 PM UTC, original submission:

I have not tried to setup actual test, but reading the sources...

Client remembers the old mapview canvas position so it can smoothly slide the view when new position is set. There's two exceptions:
- When client is first started, static variable "first" in center_tile_mapcanvas() tells that there's no old position to slide from
- set_mapview_scroll_pos() that's called for scroll bar handling disables sliding temporarily

Neither of these seem to handle the case of client to remembering position from the previous server when connecting new one. In theory this can result in at least unnecessary sliding from randomish position to the position game should start from. Worse things may happen if old server had bigger map than new one and the client remembers position outside new map boundaries.

Marko Lindqvist <cazfi>
Project Administrator


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