Artefacts with rubber band

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Author Name: Volker Fröhlich (@volter)
Original Redmine Issue: 2929

Redmine category:digitising
Assignee: nobody -

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I witnessed artefacts while measuring and digitizing. I think these functions are based on rubber band.

Interestingly, I could not reproduce the artefacts in a Windows-Virtualbox on the same machine, so it doesn't seem like the graphics driver is causing that.

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• measuring_artefacts.png (Volker Fröhlich)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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I cannot see this with gnome (Ubuntu).

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Author Name: Volker Fröhlich (@volter)

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lutra: I suppose Karmic or older? It's working perfectly fine there.

It's obviously a regression from Qt 4.5 to 4.6. Ubuntu Lucid ships Qt 4.6 and the artefacts are there. Same with Qt 4.6 and 4.7 in Fedora.

It is not linked with the graphics driver or the window manager.

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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also reproducable on debian unstable (Qt 4.6.3)

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Author Name: Giovanni Manghi (@gioman)

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odd, I cannot set them on Lucid using gnome using the measure line and area tools, but they show using the measure angle tool.

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Author Name: Marco Hugentobler (@mhugent)

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Could you please test with a953fa1 (SVN r14235)? It fixes the artifacts on my system (but could be different depending on window manager, OS, etc.)

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Author Name: Volker Fröhlich (@volter)

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Brilliant, the artefacts are gone for Qt 4.6.3 and KWin. Haven't tested other versions yet.

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• resolution was configured as fixed
• status_id was changed from Open to Closed