Datagrid Column Resize Controller

Et2DatagridColumnResizeController Controller

Overview

Header column drag-to-resize for Et2Datagrid.

Binds interact.js draggable listeners to the currently-rendered .dg-col-resize-handle elements. Those elements are replaced by Lit on every render, so hostUpdated() re-binds them after each one rather than trying to track handle identity across re-renders - re-binding is a cheap no-op when the handle set hasn’t actually changed.

helperLeftPx/helperWidthPx position the host’s floating resize-guide overlay while dragging (read directly from this controller in the host’s render()); since they’re plain fields rather than Lit @state() properties, host.requestUpdate() is called explicitly whenever they change. The dg-resizing/dg-resize-limit-min/dg-resize-limit-max classes are toggled directly on the host element instead, since nothing else in the template needs to react to them.

Used by

These widgets create and host this controller.

• Datagrid

Methods