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compositor-rdp: Correct mouse scrolling direction 

The direction of scrolling in the RDP compositor appears to be inverted.
When using Weston directly in X, sending X11 button 4 cuases window
contents to scroll up and button 4 to be reported to xwayland clients.
Conversely, when using Weston through RDP (xfreerdp client), sending
X11 button 4 causes window contents to scroll down and button 5 to be
reported to xwayland clients. The xfreerdp client does not seem to be
the cause of this since scrolling works correctly when connecting to
a Windows host.

Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Reviewed-by: David Fort <contact@hardening-consulting.com>
This commit is contained in:
Jason Gerecke 2018-02-09 08:14:41 -08:00 committed by David Fort
parent 1f7817613a
commit 9fc2e461b3
1 changed files with 1 additions and 1 deletions
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libweston/compositor-rdp.c
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@ -1062,7 +1062,7 @@ xf_mouseEvent(rdpInput *input, UINT16 flags, UINT16 x, UINT16 y)
*
* https://blogs.msdn.microsoft.com/oldnewthing/20130123-00/?p=5473 explains the 120 value
*/
value = (flags & 0xff) / 120.0;
value = -(flags & 0xff) / 120.0;
if (flags & PTR_FLAGS_WHEEL_NEGATIVE)
value = -value;