Bug 29569 - DataGridView keyboard navigation with hidden cells
Summary: DataGridView keyboard navigation with hidden cells
Status: NEW
Alias: None
Product: Class Libraries
Classification: Mono
Component: Windows.Forms ()
Version: 3.2.x
Hardware: PC Linux
: --- normal
Target Milestone: Community
Assignee: Bugzilla
Depends on:
Reported: 2015-04-30 00:42 UTC by richard.lake
Modified: 2017-09-01 11:56 UTC (History)
1 user (show)

Is this bug a regression?: ---
Last known good build:

Plain text code (3.32 KB, application/octet-stream)
2015-04-30 00:42 UTC, richard.lake

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Description richard.lake 2015-04-30 00:42:34 UTC
Created attachment 10969 [details]
Plain text code

Bug originally found at https://github.com/KSP-CKAN/CKAN-support/issues/119

When navigating a DataGridView by the up and down keys the navigation can get "stuck" below a hidden row. For example in a DGV with three rows with the 2nd row hidden it is impossible to navigate to the first from the third by pressing the up key. On windows this does not occur

Looking at the mono source it seems that the the use of the MoveCurrentCell code. When it is told to move to a hidden row/column it iterates via i++ to the next visible row/col. This is incorrect for the up/left keys in which it should iterate to the previous via i--.

A example program is attached.

Expected behavior / .Net
Click on first row. 
Press down -> Selection goes to second visible row.
Press up -> Selection goes to first visible row.

Observed / Linux mono
Click on first row. Press down -> Selection goes to second visible row.
Press up -> ** Selection remains on second row **

Problem occurs when built by mcs or Visual Studio