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specs: clarify button state in touch events

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Emulated pointer events will have button 1 logically down, but touch events
only represent the actual button state, irrespective of the touches.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>
Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
This commit is contained in:
Peter Hutterer 2011-12-14 08:56:59 +10:00 • committed by Chase Douglas
parent b1d71fe4cd
commit 8687f155d8
1 changed files with 7 additions and 2 deletions
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9
specs/XI2proto.txt
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@ -467,10 +467,12 @@ Pointer events are emulated as follows:
touch with the same axis values of the touch event, followed by a button press
event for button 1.
- A TouchUpdate event generates a pointer motion event to the location of the
touch and/or to update axis values of the pointer device.
touch and/or to update axis values of the pointer device. The button state
as seen from the protocol includes button 1 set.
- A TouchEnd event generates a pointer motion event to the location of the touch
and/or to update the axis values if either have changed, followed by a button
release event for button 1.
release event for button 1. The button state as seen from the protocol
includes button 1 set.
If a touch sequence emulates pointer events and an emulated pointer event
triggers the activation of a passive grab, the grabbing client becomes the
@ -2150,6 +2152,9 @@ of IDs. The increment between two touch IDs is indeterminate. Clients may not
assume that any future touches will have specific touch IDs. IDs are globally
unique.
The button state in touch events represents the state of the device's
physical buttons only, even if that sequence is emulating pointer events.
Touch events do not generate enter/leave events.
[[events-rawevent]]