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Analysis

Overview

Users need to be able to align frames. Alignment is done via a HUD to the current selection. Alignment is only viable when the selection contains more than one item. See the related section of this task for the multi-select task, which should be done before this task.

Alignment should be undoable, and may rely on the PRO_CHANGE tasks (see related). Alignment via the sides and centers of objects is a good start. Later we can add distribution if deemed necessary.

Task requirements

• Add a halo for alignment to frames if there is more than one frame selected
• The halo's hud will have buttons for choosing the alignment (see implementation idea)
• Alignment operations should be undoable (might be blocked by PRO_CHANGE work)

Task result

The result of this task is code

Implementation idea

• Use the PAGE_ELEMENT_MULTI_SELECT_R0 changes to determine if there is more than one item selected
• Due to the fact that we don't have grouping yet, put the alignment halo on the last frame added to the selection (this may be part of PAGE_ELEMENT_MULTI_SELECT_R0 that I missed)
• Support the following alignments:
  • Align left sides
  • Align top sides
  • Align bottom sides
  • Align right sides
  • Align vertical centers
  • Align horizontal centers

• The first frame in the selection is the master frame in terms of which frame to align to

Related

PAGE_ELEMENT_GROUPING_R0
PAGE_ELEMENT_MULTI_MANIPULATION_R0
PAGE_ELEMENT_MULTI_SELECT_R0
GROUP_PAGE_ELEMENTS_GROUP_ALIGN_R0

How to demo

Demo the alignment hud, selecting several frames and aligning them

Design

Implementation

^{(Implementation results should be described and linked here (from the wiki or the repository))}

Testing

Comments

^{(Write comments for this or later revisions here.)}