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
Drag to Connect
Drag to Reassign
Create Node on Connection Drop
Remove Connection on Drop
Assign Node to Connection on Drop
Auto Snap
Connection Types (Straight, Segment, Bezier, Adaptive Curve)
Custom Connection Type
Connection Behaviours
Connection Markers
Connection Content
New
Connection Waypoints
New
Connection Gradients
Updated
Connection Connectable Side
New
Extensions
Add Node from Palette
Selection Area
Help in Positioning (Legacy)
Deprecated
Magnetic Lines
New
Magnetic Rects
New
Grid System
Minimap
Zoom
Updated
Background
Updated
Advanced
Large Scene Performance
Updated
Connection Redraw Performance
Updated
Cut/Copy/Paste
New
Undo/Redo
Undo/Redo V2
New
Dagre Layout (Directed Graph)
ELKJS Layout (Directed Graph)
Drag Start/End Events
Custom Event Triggers
Reference Apps
AI Low-Code Platform
New
DB Management
UML Diagram
Tournament Bracket
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

[component.html] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/projects/f-examples/extensions/selection-area/selection-area.component.html [component.ts] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/projects/f-examples/extensions/selection-area/selection-area.component.ts [component.scss] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/projects/f-examples/extensions/selection-area/selection-area.component.scss [common.scss] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/projects/f-examples/_flow-common.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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