Widget align system

[mimoham24]

Leader

@KaWaite

ユーザーストーリー / User story

Users want to align multiple widgets to screens. Now where the widgets can be placed are left-top, left-bottom, right-top and right-bottom. After the plugins feature has been released, users might want to use them developed by external developers. Plugins developers can't expect where theirs will be placed and might conflict with others. Users want us to support a widget alignment system that allows them to align plugins well automatically.

Requirements

• Can support these alignments

• When the user moves the widget to a droppable area, it should collapse or expand automatically.
• Can align multiple same kinds of widget
• Droppable area has the option to choose how to align(left, center, right, etc) the widget which is inside of it.

Examples

Image (ToolStrip of Windows Form):

Acceptance criteria

• write document
  • Front-end
  • Back-end

Completion condition

• All PRs were passed CI, code-reviewed, and merged
• Tested on staging env
• Released in the production env
• A demonstration was held