Bug report #13888
Label display not fit with layer order
|Assigned to:||-||% Done:||
|Platform:||Windows + Linux||Pull Request or Patch supplied:||No|
|Platform version:||7 Pro 64 bits + openSUSE Leap 42.1||Affected version:||2.12.0|
|Status info:||Causes crash or corruption:||No|
Even with force layer order, label doesn't respect order.
Bug is not permanent, it seems depending of number of label to display on the canvas.
On screenshot, bigger label should be above small text as layer order indicated (epci is big label, commune is small one)
Note that if I export composer to SVG file, label order rendering is fine.
[FEATURE] Control over label rendering order
A new control for setting a label's "z-index" has been added to
the labeling properties dialog. This control (which also accepts
data-defined overrides for individual features) determines the order
in which label are rendered. Label layers with a higher z-index
are rendered on top of labels from a layer with lower z-index.
Additionally, the logic has been tweaks so that if 2 labels have
matching z-indexes, then:
- if they are from the same layer, a smaller label will be drawn
above a larger label
- if they are from different layers, the labels will be drawn in
the same order as the layers themselves (ie respecting the order
set in the legend)
Diagrams can also have their z-index set (but not data defined)
so that the order of labels and diagrams can be controlled.
Note that this does NOT allow labels to be drawn below the
features from other layers, it just controls the order in which
labels are drawn on top of all the layer's features.
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