Switcher Binders

The Switcher pattern: bool → one of two preset values.

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Overview

A Switcher binder takes a bool and returns one of two values:

• true → _trueValue
• false → _falseValue

An alternative to converters for simple "if/else" cases.

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SwitcherBinder<T>

The base class (not a MonoBehaviour):

public abstract class SwitcherBinder<T> : Binder, IBinder<bool>
{
    // Serialized in the Inspector:
    protected T _trueValue;
    protected T _falseValue;

    public void SetValue(bool value)
    {
        SetValue(value ? _trueValue : _falseValue);
    }

    protected abstract void SetValue(T value);
}

Modes: OneWay, OneTime. TwoWay and OneWayToSource are not supported.

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Ready-made Switcher binders

Almost every standard binder has a Switcher variant:

Switcher binder	Picks between	Example
TextSwitcherBinder	two strings	"Active" / "Inactive"
TextFontSwitcherBinder	two fonts	Bold / Regular
TextFontSizeSwitcherBinder	two sizes	24 / 16
TextAlignmentSwitcherBinder	two alignments	Center / Left
ImageSpriteSwitcherBinder	two sprites	CheckOn / CheckOff
ImageFillSwitcherBinder	two fillAmount values	1.0 / 0.0
SliderMinMaxSwitcherBinder	two min/max pairs	(0,100) / (0,10)
GraphicColorSwitcherBinder	two colors	Green / Red
CanvasGroupAlphaSwitcherBinder	two alpha values	1.0 / 0.3
RendererMaterialsColorSwitcherBinder	two colors	Lit / Dark
SelectableColorBlockSwitcherBinder	two ColorBlocks	Normal / Disabled

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SwitcherMonoBinder

The MonoBehaviour variant for the Inspector:

// Three generic overloads:
SwitcherMonoBinder<T>                    // no converter
SwitcherMonoBinder<T, TTarget>           // with a target component
SwitcherMonoBinder<T, TTarget, TConv>    // with a converter

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Example

ViewModel

[ViewModel]
public partial class TaskViewModel
{
    [OneWayBind] private bool _isCompleted;
}

Inspector

1. Add TextSwitcherBinder to the object with TextMeshPro
2. Set:
   • True Value = "Done"
   • False Value = "In progress"
3. Bind to IsCompleted

Result: the text switches whenever IsCompleted changes.

Status colors

1. Add GraphicColorSwitcherBinder
2. True Value = green
3. False Value = red

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Switcher vs converter

Switcher	Converter
Two fixed values	Arbitrary transformation
Configured in the Inspector	Logic in code
bool input only	Any input type
Quick setup	Reusable logic

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See also

• Converters, arbitrary transformations
• StarterKit overview, every component in one table