Table Widget Example

Demonstrates advanced options for the Table widget, including selection, row-level highlighting, and column-level highlighting.

Data grids are complex. Users expect to navigate them with keys, select rows, and clearly see which cell is active. The Table widget provides these features out of the box efficiently.

Features Demonstrated

• Selection State: Managing selected_row and selected_column to track user focus.

• Complex Highlighting:

  • Row: Highlight the entire active row.

  • Highlight Symbol: Adding a visual indicator (like > ) to the selected row.

• Spacing: Adjusting column_spacing and highlight_spacing to control layout density.

• Flex Layout: Switching between different column distribution modes (legacy, start, space_between, etc.).

• Offset Control: Manually controlling the scroll position using offset.

Hotkeys

• Arrows (↑/↓): Navigate Rows (selected_row)

• Arrows (←/→): Navigate Columns (selected_column)

• x: Toggle Row Selection (selected_row = nil)

• s: Cycle Table Style (style)

• p: Cycle Spacing (highlight_spacing)

• c: Toggle Column Highlight (column_highlight_style)

• z: Toggle Cell Highlight (cell_highlight_style)

• o: Cycle Offset Mode (offset)

• f: Cycle Flex Mode (flex)

• q: Quit

Usage

ruby examples/widget_table_demo/app.rb

Learning Outcomes

Use this example if you need to… - Build a file explorer or process list. - Create a data-heavy dashboard. - Handle conflicting style requirements (e.g., “Highlight this row, but make this error cell red”).