openframeworks / openframeworks/openFrameworks
dragEvent bad mouse coordinates (ubuntu 14.04)
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- Dominant language
- C++
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Description
Context : Of 0.9.0 on ubuntu 14.04.
Here is the scenario :
- I drop a file into my OfWindow
- dragEvent is called with ofDragInfo mouse position at X, Y
- I click
- mousePressed is called with mouse position at X, Y
- I move my mouse just a bit 1 pixel right and one pixel left (to force mouse event to occur)
- I click
- mousePressed is called with mouse position at X-10, Y-40
- these last coordinate should be the expected ones.
My workaround for now to avoid this bug is to patch coordinate like this in my dragEvent handler : dragInfo.position - ofPoint(10, 40)
So my guess is mouse coordinates are wrong during dragging since all mouse events gives expected X + 10 and expected Y + 40.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the dragEvent and mousePressed sequence on Ubuntu 14.04 with openFrameworks 0.9.0, comparing the reported X/Y values before and after the one-pixel move. Trace the dragEvent and mousePressed entry points and the ofDragInfo position; done means both event paths report the expected coordinates without the stated (10, 40) correction.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp, linux, ubuntu
- Domain
- desktop, operating-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100