class Opal::UI::ScrollBar

Overview

Focusable, interactive ScrollBar component supporting Vertical and Horizontal orientations, proportional thumb sizing, arrow stepper buttons, mouse dragging, and keyboard paging navigation.

Defined in:

opal/ui/components/scrollbar.cr

Constructors

Instance Method Summary

Constructor methods inherited from class Opal::UI::Control

new new

Instance methods inherited from module Opal::UI::InputHookable

custom_inputs=(custom_inputs : Bool) custom_inputs=, custom_inputs? : Bool custom_inputs?, default_input_proc : Proc(InputEvent, Bool) | Nil default_input_proc, default_input_proc=(default_input_proc : Proc(InputEvent, Bool) | Nil) default_input_proc=, fallback_to_defaults!(enabled : Bool = true) : self fallback_to_defaults!, fallback_to_defaults=(fallback_to_defaults : Bool) fallback_to_defaults=, fallback_to_defaults? : Bool fallback_to_defaults?, focus : self focus, focused=(focused : Bool) focused=, focused? : Bool focused?, handle_default_input(event : InputEvent) : Bool handle_default_input, handle_input(event : InputEvent) : Bool handle_input, handle_key(key : Terminal::KeyEvent) : Bool handle_key, handle_mouse(event : Terminal::MouseEvent) : Bool handle_mouse, input_hook : Proc(InputEvent, Bool) | Nil input_hook, input_hook=(input_hook : Proc(InputEvent, Bool) | Nil) input_hook=, on_input(&block : self, InputEvent -> Bool) : self on_input, puppet(&block : self, InputEvent -> Bool) : self puppet, reset_inputs : self reset_inputs, setup_default_inputs : Nil setup_default_inputs, unfocus : self unfocus, use_custom_inputs!(enabled : Bool = true) : self use_custom_inputs!

Instance methods inherited from class Opal::UI::Element

add_class(name : String) : self add_class, children : Array(Element) children, classes : Set(String) classes, classes=(classes : Set(String)) classes=, has_class?(name : String) : Bool has_class?, id : String | Nil id, id=(id : String | Nil) id=, preferred_print_size(available_w : Int32) : Tuple(Int32, Int32) preferred_print_size, preferred_size(available_w : Int32, available_h : Int32) : Tuple(Int32, Int32) preferred_size, print(io : IO = STDOUT, width : Int32 | Nil = nil, color : Bool | Nil = nil, theme : Theme | Nil = nil) : Nil print, query(selector : String) : Array(Element)
query(klass : T.class) : Array(T) forall T query, query_one(selector : String) : Element
query_one(klass : T.class) : T forall T query_one, query_one?(selector : String) : Element | Nil
query_one?(klass : T.class) : T | Nil forall T query_one?, remove_class(name : String) : self remove_class, render(buffer : Buffer, x : Int32, y : Int32, width : Int32, height : Int32) : Nil render, render_print(buffer : Buffer, width : Int32, height : Int32) : Nil render_print, to_print_s(width : Int32 | Nil = nil, color : Bool | Nil = nil, theme : Theme | Nil = nil) : String to_print_s, to_string(width : Int32 | Nil = nil, color : Bool | Nil = nil, theme : Theme | Nil = nil) : String to_string

Instance methods inherited from module Opal::UI::Themable

current_theme : Theme current_theme, style(&block : self -> Nil) : self style, theme : Theme | Nil theme, theme=(theme : Theme | Nil) theme=, with_theme(new_theme : Theme | Symbol | String) : self with_theme

Constructor Detail

def self.new(orientation : Orientation | Symbol = Orientation::Vertical, min_value : Int32 = 0, max_value : Int32 = 100, value : Int32 = 0, page_size : Int32 = 10, show_arrows : Bool = true, on_change : Proc(Int32, Nil) | Nil = nil) #

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def self.new(orientation : Orientation = Orientation::Vertical, min_value : Int32 = 0, max_value : Int32 = 100, value : Int32 = 0, page_size : Int32 = 10, show_arrows : Bool = true, &block : Int32 -> Nil) : ScrollBar #

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Instance Method Detail

def arrow_down_char : Char | Nil #

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def arrow_down_char=(arrow_down_char : Char | Nil) #

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def arrow_fg : Color | Nil #

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def arrow_fg=(arrow_fg : Color | Nil) #

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def arrow_left_char : Char | Nil #

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def arrow_left_char=(arrow_left_char : Char | Nil) #

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def arrow_right_char : Char | Nil #

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def arrow_right_char=(arrow_right_char : Char | Nil) #

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def arrow_up_char : Char | Nil #

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def arrow_up_char=(arrow_up_char : Char | Nil) #

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def handle_key(key : Terminal::KeyEvent) : Bool #
Description copied from module Opal::UI::InputHookable

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


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def handle_mouse(event : Terminal::MouseEvent) : Bool #
Description copied from module Opal::UI::InputHookable

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


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def max_value : Int32 #

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def max_value=(max_value : Int32) #

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def min_value : Int32 #

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def min_value=(min_value : Int32) #

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def on_change : Proc(Int32, Nil) | Nil #

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def on_change(&block : Int32 -> Nil) : self #

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def on_change=(on_change : Proc(Int32, Nil) | Nil) #

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def orientation : Orientation #

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def orientation=(orientation : Orientation) #

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def page_size : Int32 #

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def page_size=(page_size : Int32) #

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

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

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def scroll(delta : Int32) : self #

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def set_value(new_val : Int32) : self #

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def show_arrows=(show_arrows : Bool) #

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def show_arrows? : Bool #

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def thumb_bg : Color | Nil #

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def thumb_bg=(thumb_bg : Color | Nil) #

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def thumb_char : Char | Nil #

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def thumb_char=(thumb_char : Char | Nil) #

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def thumb_fg : Color | Nil #

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def thumb_fg=(thumb_fg : Color | Nil) #

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def track_bg : Color | Nil #

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def track_bg=(track_bg : Color | Nil) #

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def track_char : Char | Nil #

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def track_char=(track_char : Char | Nil) #

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def track_fg : Color | Nil #

Manipulable theme properties and character swaps


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def track_fg=(track_fg : Color | Nil) #

Manipulable theme properties and character swaps


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def value : Int32 #

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def value=(value : Int32) #

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