struct TUI::ScrollControl

• TUI::ScrollControl
• Struct
• Value
• Object

Overview

A narrow handle onto a Window's Scroller, handed to Scrollable content so it can drive scrolling (reveal-on-select, page up/down, wheel ticks) without owning the Scroller itself or knowing its own viewport size beyond what's captured here at construction time.

Defined in:

tui/widget/scroll_control.cr

Constructors

• .new(scroller : Scroller, visible : Int32)

Instance Method Summary

• #down(by : Int32 = 1, total : Int32 = Int32::MAX) : Nil
• #offset : Int32
• #reset : Nil
• #reveal(index : Int32) : Nil
• #up(by : Int32 = 1) : Nil
• #visible : Int32

  The viewport size this control was constructed with — content uses this as the page-size for PageUp/PageDown (matching what Window itself measured as the visible content area for this frame).

• #wheel_down(by : Int32 = Scroller::WHEEL_STEP, total : Int32 = Int32::MAX) : Nil
• #wheel_up(by : Int32 = Scroller::WHEEL_STEP) : Nil

Constructor Detail

Instance Method Detail