Make labels follow layer z-order

[qgib]

Author Name: Noone Noone (Noone Noone)
Original Redmine Issue: 9277

Redmine category:symbology

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Hi, I guess I found a small bug in label rendering:

Usually a layer is hidden, if add a raster layer on top, so it's rendered below the other layer (or skip rendering). Unfortunatly, if you add a raster layer above an existing vector layer with labels enabled, the symbolizers get hidden as expected, but the labels not :(

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• QGIS_labels_order_2.png (Noone Noone)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Hi,

this is not a bug but rather a feature. I guess that the main purpose is to allow show labels of features without having necessarily to show the feature or have to make a layer entirely transparent.

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• status_id was changed from Open to Closed
• resolution was changed from to invalid

[qgib]

Author Name: Noone Noone (Noone Noone)

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I'm ok to keep is a (optional) feature, but please be aware that this is completely unexpected behavior, as the user keeps the association layer->label and this behaviour breaks this association and so the rendering looks corrupted from this POV.

[qgib]

Author Name: Giovanni Manghi (@gioman)

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noone noone wrote:

I'm ok to keep is a (optional) feature, but please be aware that this is completely unexpected behavior, as the user keeps the association layer->label and this behaviour breaks this association and so the rendering looks corrupted from this POV.

it is so unexpected? how other gis software works in this sense?

[qgib]

Author Name: Markus Straub (@EvoD)

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I would like to reopen this bug since this is a feature I miss as well.

Both behaviours have their use cases.
The current behaviour (drawing labels on top of all layers) is useful for most cases.

The additionally desired behaviour of labels having the same z-order as its parent layer is useful e.g. if we want to create a background map (e.g. a street graph with street names as labels) and then draw more important data on top. The layer on top is then not be "disturbed" by low-priority street names. (This way we would be able to create a background map that behaves exactly like maps added via the OpenLayers plugin.)

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• status_id was changed from Closed to Reopened

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• easy_fix was configured as 0
• regression was configured as 0

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Please test with a recent QGIS release (2.18 or 3), if the issue/request is still valid change the affected version accordingly, if is fixed/implemented then close the ticket. Thanks!

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• status_id was changed from Reopened to Feedback

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• status_id was changed from Feedback to Open
• tracker_id was changed from 1 to 2
• subject was changed from Labels don't follow layer z-order to Make labels follow layer z-order
• description was changed from Hi, I guess I found a small bug in label rendering:

Usually a layer is hidden, if add a raster layer on top, so it's rendered below the other layer (or skip rendering). Unfortunatly, if you add a raster layer above an existing vector layer with labels enabled, the symbolizers get hidden as expected, but the labels not :(

!QGIS_labels_order_2.png! to Hi, I guess I found a small bug in label rendering:

Usually a layer is hidden, if add a raster layer on top, so it's rendered below the other layer (or skip rendering). Unfortunatly, if you add a raster layer above an existing vector layer with labels enabled, the symbolizers get hidden as expected, but the labels not :(

!QGIS_labels_order_2.png!

• resolution was changed from invalid to

[pathmapper]

Just came across this (#51448), it's kind of unexpected if the raster layer covers the whole vector layer. So an option for having the labels matching the layer order would be nice.