class

Opal::UI::ContentSwitcher

Inherits Opal::UI::Control < Opal::UI::InputHookable < Opal::UI::Element < Opal::UI::Themable < Reference < Object

Container that manages multiple child views and displays only the active one by key. Inspired by Python Textual's ContentSwitcher. Preserves child element states across view switches without rebuilding trees.

Constructors

new(views : Hash(String, Element) = {} of String => Element, current : String | Nil = nil)

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Instance methods

active_element

Returns currently active element

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children

Returns child elements for hierarchical tree traversal and DOM querying

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current

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current=(current : String | Nil)

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handle_key(event : Terminal::KeyEvent) : Bool

Default key event handler. Override in subclasses if not using @default_input_proc.

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handle_mouse(event : Terminal::MouseEvent) : Bool

Default mouse event handler. Override in subclasses if not using @default_input_proc.

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preferred_size(available_w : Int32, available_h : Int32) : Tuple(Int32, Int32)

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render(buffer : Buffer, x : Int32, y : Int32, width : Int32, height : Int32) : Nil

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set_view(name : String, element : Element) : self

Adds a named child view to the switcher

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switch_to(name : String) : self

Switches active view by name

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views

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