Foblex Flow
Introduction
Overview
Nodes
Custom Nodes
Drag Handle
Node Selection
Resize Handle
Rotate Handle
Grouping
Drag to Group
Connectors
Node as Connector
Connector Inside Node
Connector Outlet
Limiting Connections
Connection Rules
Connectable Side
Updated
Connections - Editing
Drag to Connect
Drag to Reassign
Create Node on Connection Drop
Remove Connection on Drop
Assign Node to Connection on Drop
Auto Snap
Connections - Appearance
Connection Types (Straight, Segment, Bezier, Adaptive Curve)
Custom Connection Type
Connection Behaviours
Connection Markers
Connection Content
Updated
Connection Gradients
Updated
Connections - Routing
Connection Waypoints
New
Connection Connectable Side
New
Viewport
Minimap
Zoom
Background
Auto Pan
New
Canvas Layer Ordering
New
Editor Helpers
Selection Area
Magnetic Lines
New
Magnetic Rects
New
Grid System
Add Node from Palette
Help in Positioning (Legacy)
Deprecated
Layout Engines
Dagre Layout
New
Dagre Auto Layout
New
ELK.js Layout
New
ELK.js Auto Layout
New
Reflow
Reflow on Resize
New
Editor State
Cut/Copy/Paste
Undo/Redo
Undo/Redo V2
Events
Drag Start/End Events
Custom Event Triggers
Performance
Large Scene Performance
Connection Redraw Performance
Updated
Reference Apps
AI Low-Code Platform
Updated
Schema Designer
Updated
Call Center Flow
Updated
UML Diagram
Updated
Tournament Bracket
Updated
Foblex Flow

Selection Area

Description

This guide shows how to add a selection area to the canvas. Use the Shift key and the mouse to select multiple nodes with a rectangle, which is a baseline interaction for larger node editors and workflow tools.

Selection area becomes important as soon as users need to move, delete, group, or inspect several nodes at once. Without it, a graph interface quickly becomes frustrating on dense canvases.

Example

[example.html] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/libs/f-examples/extensions/selection-area/example.html [example.ts] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/libs/f-examples/extensions/selection-area/example.ts [example.scss] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/libs/f-examples/extensions/selection-area/example.scss

When to use it

  • Multi-select nodes before moving or deleting them.
  • Prepare groups or batch operations.
  • Improve keyboard-and-mouse workflows in larger diagrams.

Once your canvas holds more than a handful of nodes, box selection usually becomes a core interaction instead of an optional enhancement.

It also pairs naturally with grouping, alignment helpers, and undo/redo workflows.

Related docs

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