Anchor point legend not firmly anchored in template

[qgib]

Author Name: Gert Jan Pieterse (Gert Jan Pieterse)
Original Redmine Issue: 19987
Affected QGIS version: 3.2.1
Redmine category:map_legend
Assignee: Nyall Dawson

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I created the following layout templates with legends:

• Legend in the upper-right corner.
• Anchor point in the upper right corner.
• The legend has 'auto-update' turned on.

My problem is that with a new map using this template, the legend moves. I think this is what happens:

• The legend get rescaled with new items, making it longer / shorter and wider / smaller.
• The upper-left corner stays at the same place as in the template.
• The upper-right corner gets recalculated using the upper-left corner and new width.
• The upper-right corner gets anchored again with the new position.

Calculation example:

• template 19x19 cm page
• legend width during making of the template: 5 cm.
• anchor point upper-right corner: X = 19.0 cm, Y = 0.0 cm.
• legend width in new map: 5.5 cm.
• legend upper-left corner: X = 14.0 cm, Y = 0.0 cm.
• legend new anchor point upper-right: X = 19.5 cm, Y = 0.0 cm.

[qgib]

Author Name: Harrissou Santanna (@DelazJ)

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Actually, afaics no need to use a template. An anchor set for a legend in a print layout is not respected:

1. create a legend item
2. set an anchor other than the upper left
3. Use the filter legend by map content : the legend is resized based on the upper left instead of the right.

This is a regression as it should have been fixed since #19617.

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• regression was changed from 0 to 1
• priority_id was changed from Normal to High

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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• assigned_to_id was configured as Nyall Dawson
• status_id was changed from Open to In Progress

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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Applied in changeset 530397c.

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• done_ratio was changed from 0 to 100
• status_id was changed from In Progress to Closed