[Qgis-developer] undisplayed elements are selected

[Nathan Woodrow]

I agree.

This is a bug then.  Fill a ticket if none exists.

- Nathan

On Fri, Mar 16, 2012 at 7:39 PM, Andreas Neumann <a.neumann at carto.net>wrote:

> For me it would be ok if I can select invisible features from the table,
> but it feels strange to select invisible features in the map.
>
> After all my filter is there for a reason - I want them to be invisible
> and therefore I don't want them to be selectable if they are invisible.
> QGIS server with GetFeatureInfo behaves like this and I think it is logical.
>
> It even gets more complicated if you digitize and have snapping settings
> on a rule-based layer. Think about it - you digitize and suddenly it snaps
> to some invisible feature - it would be a usability nightmare ...
>
> Andreas
>
> On Fri, 16 Mar 2012 09:40:37 +0100,  wrote:
>
>  some thoughts (unordered):
>>
>> A) thinking from the table side I can always select any feature there
>> regardless if it is currently visible or not. When I zoom to the
>> selection then I am responsible that all features are visible in order
>> to see my selection. So the current behaviour is just the other way
>> round. If I want to exclude features I have to define a query on the
>> layer filtering out unwanted features.
>>
>> B) map visibility can be controlled by three ways:
>> 1) visibility of the layer on/off => features are not selectable in map
>> 2) scale-based visibility of the whole layer => features get
>> selected, even when not visible
>> 3) rule based style with scale based visibility for rules (Denis'
>> case) => features get selected, even when not visible
>> To me case 1 is expected behaviour, cases 2 and 3 are not (although
>> not too unexpected when considering thought A), but hard to explain to
>> a user)
>>
>> - possible solution to accompany A) and B): show all selected
>> features in selection color regardless of their individual scale-based
>> visibility. No idea if that is feasible.
>>
>> Bernhard
>>
>> Am 16.03.2012 09:12, schrieb Andreas Neumann:
>>
>>> hm - I agree with Denis. Features invisible because of scale ranges
>>> should not be selectable and should not react to map tips.
>>>
>>> In QGIS Server we filtered the invisible features away in GetFeatureInfo
>>> requests. The same should be done for selecting features in QGIS desktop
>>> and for the map tips. The rule-based renderer V2 offers a method called
>>> willRenderFeature() (see
>>>
>>> http://doc.qgis.org/api/**classQgsRuleBasedRendererV2.**html#**
>>> b514bc63bd9e744faca24236a89b7e**4d<http://doc.qgis.org/api/classQgsRuleBasedRendererV2.html#b514bc63bd9e744faca24236a89b7e4d>
>>> )
>>> that could be used to see if such a feature is displayed or not. But the
>>> method says that it has to be called between startRender() and
>>> stopRender() calls - so I don't know if it would work for
>>> querying/selection features?
>>>
>>> Any thoughts?
>>> Andreas
>>>
>>> On Fri, 16 Mar 2012 00:44:02 -0700, Nathan Woodrow wrote:
>>>
>>>> I would say this could be an expected behaviour as styling is only a
>>>> visual thing and doesn't affect the data....maybe.
>>>>
>>>> - Nathan
>>>>
>>>> Sent from my Windows Phone
>>>> From: Denis Rouzaud
>>>> Sent: 16/03/2012 5:20 PM
>>>> To: Qgis-developer at lists.osgeo.org
>>>> Subject: [Qgis-developer] undisplayed elements are selected
>>>> Hi all,
>>>>
>>>> When using the rules style for a layer and defining a scale range, if
>>>> you select by rectangle on the map, everything is selected including
>>>> undisplayed features.
>>>>
>>>> Is there already an issue opened, I searched without any result.
>>>>
>>>> Greetings,
>>>>
>>>> Denis
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>>>
>>>
>>
>>
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>
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> Andreas Neumann
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