Bug report #13695
Extents (Print Composer): Data defined override not working
| Status: | Closed | ||
|---|---|---|---|
| Priority: | High | ||
| Assignee: | - | ||
| Category: | Map Composer/Printing | ||
| Affected QGIS version: | master | Regression?: | No |
| Operating System: | Windows 7 | Easy fix?: | No |
| Pull Request or Patch supplied: | No | Resolution: | |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 21725 |
Description
In the print composer (QGIS 2.12) the data defined override for 'Extents' is ignored.
@
X min:
xmin(geometry(getFeature('layer', 'gid', 1)))
Y min:
ymin(geometry(getFeature('layer', 'gid', 1)))
X max:
xmax(geometry(getFeature('layer', 'gid', 1)))
Y max
ymax(geometry(getFeature('layer', 'gid', 1)))@
There is also no 'Output preview' in the 'Expression string builder'. Everything works fine in QGIS 2.10
Associated revisions
Fix FilterExpression feature requests will ignore expression if
using virtual fields or other complex filters
refs #13695
Fix expression get_feature function was not fetching feature's
geometry
Fix #13695
Fix FilterExpression feature requests will ignore expression if
using virtual fields or other complex filters
refs #13695
(cherry-picked from dddd043491deefe1e4c9606a87a771d22736ff05)
Fix expression get_feature function was not fetching feature's
geometry
Fix #13695
(cherry-picked from c445ac1eef0a2f94d1e334b1439d593e706f1395)
History
#1
Updated by Nyall Dawson almost 10 years ago
That expression looks very odd. What are you trying to do?
#2
Updated by Paul Kanelli almost 10 years ago
I've to define map extents based on a feature's geometry:
http://gis.stackexchange.com/questions/150042/how-to-define-map-extents-based-on-a-features-geometry
#3
Updated by Nyall Dawson almost 10 years ago
So you have a single feature in the 'layer' table which dictates the extent for all your atlas pages?
#4
Updated by Paul Kanelli almost 10 years ago
It's just an example. The name of my layer is "sheet_lines". Every feature (rectangles in portrait and/or landscape format) represents a composer page.
#5
Updated by Nyall Dawson almost 10 years ago
I'm still confused as to why you aren't just directly setting "controlled by atlas" on your map and letting it automatically set the map extent.
This expression:
xmin(geometry(getFeature('layer', 'gid', 1)))Will always return the same number. It will just get the first feature from 'layer' with a 'gid' of 1 and return the min x coordinate of it.
Any chance you could share a project/sample data which demonstrates this issue?
#6
Updated by Paul Kanelli almost 10 years ago
- File map_canvas.jpg added
- File composer_1_A0_Portrait.jpg added
- File composer_2_A1_Landscape.jpg added
I haven't testet if "controlled by atlas" can handle different paper formats and orientations (see attachment). However QGIS 2.12 fails data defined override for 'Extents'. It's working in QGIS 2.10.
#7
Updated by Harrissou Santanna almost 10 years ago
Maybe, you are looking for something like this?
Indeed, there's an issue. But I wonder if it isn't with get_feature function in 2.12. using a formule in the "data defined override" for extent, without get_feature, works :
Case WHEN @layout_pageheight>@layout_pagewidth then 437000 else 437500 end changes the X min value according to the orientation of the composition page.
To test the issue with get_feature, on the same data, I use the "Select by expression tool" with:
- attribute(getFeature('commune','insee','49080'),'gid') > "gid" in 2.8.3 : retrieves 77 features, what is expected
- attribute(get_feature('commune','insee','49080'),'gid') > "gid" in 2.12 and master : retrieves ALL the features in the table
#8
Updated by Nyall Dawson almost 10 years ago
- Status changed from Open to Closed
Fixed in changeset c445ac1eef0a2f94d1e334b1439d593e706f1395.