map.view.constrainResolution to false by default

[ger-benjamin]

In vars, .gmfOptions.map.view.contrainResolution should be falsy by default. Because if "true", Openlayers makes the map looking "bumpy" on zoom in/out.

This is looks like an issue, especially on the default desktop.
Eventually, we could add constrainResolution: True on the desktop_alt.

See also issue opened in: camptocamp/GeoMapFish#92

Change come from 0819c18#diff-25ddc46a3475e6781818af028a3ee89287e30737c656dcbcd85c0be7a36e3fd6L46

[jwkaltz]

Can we add a small comment in this file to explain why "False" is better?
So we don't make the mistake again of changing this setting?

[ger-benjamin]

It's not better, just... different. It's a pure Openlayers feature.
Well, I documented the commit, and the PR, + two issues and one jira ticket, that's already something.
But we could add this documentation here, or in ngeo directly too https://camptocamp.github.io/ngeo/master/apidoc/types/srcapi_store_config.View.html#__type.constrainResolution or eventually here:
https://camptocamp.github.io/c2cgeoportal/master/integrator/ngeo.html#view

[ochriste]

as a reminder:

constrainResolution | boolean (defaults to false) | If true, the view will always animate to the closest zoom level after an interaction; false means intermediary zoom levels are allowed.

so it may have some side effects when not wanting intermediary zoom levels but I dont remember exactly

[sbrunner]

I suspect that with change the map becomes a little blurry, it's not what we want...

Edit: with WMTS layers

[ger-benjamin]

I'll dig deeper, that's probably not the only and best solution.