Fix bug #9060: Area is wrong in QGIS master (again)

[ahuarte47]

This PR try fix bug #9060 (http://hub.qgis.org/issues/9060) and weird behabior detected in issue #7441 (http://hub.qgis.org/issues/7441#note-4) :

"... To add to the confusion there's 2 "WGS84" ellipsoids listed - one is "WGS84" and one is "WGS 84". Choosing "WGS84" actually results in "Clarke 1986" being saved for the project! ..."

Changes:

• Fix bad selection of ellipsoid from active CRS in QgsProjectProperties dialog
• Notify with a tooltip the new mapunits and ellipsoid automatically selected when the CRS is changed
• Disable map units selection when OTF is ON
• Preserve the units and ellipsoid from current project settings when the project properties dialog (QgsProjectProperties) is loaded

[ahuarte47]

This patch it is pending of verification.
I have requested help for users who have detected the problem in the related issue #9060

http://hub.qgis.org/issues/9060

[mhugent]

assigned to @mhugent

[NathanW2]

@mhugent any thoughts on this.

[nirvn]

That's one of the few remaining pull request which I feel should make its way into 2.4.

[wonder-sk]

I think we should be prudent and not apply this PR just few days before the release... I find the current logic relatively complicated and it is easy to break something.

I just gave it a quick test as I thought that the change "Preserve the units and ellipsoid from current project settings when the project properties dialog (QgsProjectProperties) is loaded" would fix http://hub.qgis.org/issues/10392 - but it does not help...

[gioman]

This was closed because the issue was fixed anyway?

[ahuarte47]

Hi Giovanni, this fix is very old, the QgsProjectProperties form has been edited many times and I supposse that this fix is obsolete,