Having one finger as pivot, it confuses the gesture engine
Bug #617306 reported by
Ara Pulido
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Grail |
Fix Released
|
Medium
|
Henrik Rydberg | ||
| sparsha |
Invalid
|
Undecided
|
Unassigned | ||
Bug Description
Normally, because how the the thumb is positioned, the thumb normally acts as a pivot.
The gesture engine, as soon as one of the fingers (usually the thumb) is not moved gets confused and usually returns Drag movement, instead of the movement that the user is performing.
I am attaching two files, one performing a pinch with two fingers and one rotation with three fingers. In both cases, the gesture engine returns Drag several times.
Revision history for this message
| Ara Pulido (ara) wrote | #1 |
Revision history for this message
| Ara Pulido (ara) wrote | #2 |
| Changed in sparsha: | |
| status: | New → Invalid |
| visibility: | private → public |
| tags: |
added: hci removed: tci |
| Changed in utouch-grail: | |
| status: | New → In Progress |
| assignee: | nobody → Henrik Rydberg (rydberg) |
Revision history for this message
| Henrik Rydberg (rydberg) wrote | #3 |
| Changed in utouch-grail: | |
| importance: | Undecided → Medium |
| status: | In Progress → Opinion |
| Changed in utouch-grail: | |
| status: | Opinion → Confirmed |
| status: | Confirmed → In Progress |
| Changed in utouch-grail: | |
| status: | In Progress → Fix Committed |
Revision history for this message
| Chase Douglas (chasedouglas) wrote | #4 |
| Changed in utouch-grail: | |
| status: | Fix Committed → Fix Released |
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Ara, we have had days-long discussions around this, and finally decided that there is a natural model that will things work as you expected when writing the bug, but the current implementation is also correct, and will prevail at least for maverick. Thus, it is expected that, during a rotation around a single pivot finger, that you will see both drag events and rotation events, such that if mapping the drag and rotation to the movement of a paper under you hand, the point under the pivot finger will not move. Details can be found here https:/