public abstract class BaseSlider<TValueType, THandleValueType> : ExVisualElement, IEventHandler, ITransform, ITransitionAnimations, IExperimentalFeatures, IVisualElementScheduler, IResolvedStyle, IContextOverrideElement, IInputElement<TValueType>, IValidatableElement<TValueType>, INotifyValueChanging<TValueType>, INotifyValueChanged<TValueType> where TValueType : IEquatable<TValueType> where THandleValueType : struct, IComparable, IEquatable<THandleValueType>

Type Parameters

Name	Description
TValueType	A comparable value type.
THandleValueType	A value type for a single handle of the slider. This can be the same as `TValueType`.

Constructors

BaseSlider()

Default constructor.

Declaration

protected BaseSlider()

Fields

m_CurrentDirection

The current direction of the layout.

Declaration

protected Dir m_CurrentDirection

Field Value

Type	Description
Dir

m_DraggerManipulator

The dragger manipulator used to move the slider.

Declaration

protected Draggable m_DraggerManipulator

Field Value

Type	Description
Draggable

m_HighValue

Slider max value.

Declaration

protected THandleValueType m_HighValue

Field Value

Type	Description
THandleValueType

m_LowValue

Slider min value.

Declaration

protected THandleValueType m_LowValue

Field Value

Type	Description
THandleValueType

m_PreviousValue

The previous value of the slider before the user started interacting with it.

Declaration

protected TValueType m_PreviousValue

Field Value

Type	Description
TValueType

m_Value

The current value of the slider.

Declaration

protected TValueType m_Value

Field Value

Type	Description
TValueType

Properties

formatString

The format string used to display the value of the slider.

Declaration

public string formatString { get; set; }

Property Value

Type	Description
string

highValue

Specify the maximum value in the range of this slider.

Declaration

public THandleValueType highValue { get; set; }

Property Value

Type	Description
THandleValueType

invalid

The invalid state of the slider.

Declaration

public bool invalid { get; set; }

Property Value

Type	Description
bool

lowValue

Specify the minimum value in the range of this slider.

Declaration

public THandleValueType lowValue { get; set; }

Property Value

Type	Description
THandleValueType

validateValue

The validation function used to validate the value of the slider.

Declaration

public Func<TValueType, bool> validateValue { get; set; }

Property Value

Type	Description
Func<TValueType, bool>

value

The current value of the slider.

Declaration

public TValueType value { get; set; }

Property Value

Type	Description
TValueType

Methods

Clamp(TValueType, THandleValueType, THandleValueType)

Utility method to clamp a TValueType value between specified bounds.

Declaration

protected abstract TValueType Clamp(TValueType v, THandleValueType lowBound, THandleValueType highBound)

Parameters

Type	Name	Description
TValueType	v	The value to clamp.
THandleValueType	lowBound	Minimum
THandleValueType	highBound	Maximum

Returns

Type	Description
TValueType	The clamped value.

ClampValue()

Called when the low or high value has changed and needs to check if the current value fits in this new range.

Declaration

protected virtual void ClampValue()

ComputeValueFromHandlePosition(float, float)

Returns the value to set as slider value based on a given dragger position.

Declaration

protected virtual TValueType ComputeValueFromHandlePosition(float sliderLength, float dragElementPos)

Parameters

Type	Name	Description
float	sliderLength	The length of the slider.
float	dragElementPos	The position of the dragger.

Returns

Type	Description
TValueType	The value to set as slider value based on a given dragger position.

Decrement(THandleValueType)

Method to implement which returns the decrement of a given value.

Declaration

protected abstract THandleValueType Decrement(THandleValueType val)

Parameters

Type	Name	Description
THandleValueType	val	The value to decrement.

Returns

Type	Description
THandleValueType	The decremented value.

GetClampedValue(TValueType)

Return the clamped value using current lowValue and highValue values. The method also checks if low and high values are inverted.

Declaration

protected virtual TValueType GetClampedValue(TValueType newValue)

Parameters

Type	Name	Description
TValueType	newValue	The value to clamp.

Returns

Type	Description
TValueType

GetSliderRect()

Returns the rect of the interactive part of the slider.

Declaration

protected virtual Rect GetSliderRect()

Returns

Type	Description
Rect	The rect of the interactive part of the slider.

Increment(THandleValueType)

Method to implement which returns the increment of a given value.

Declaration

protected abstract THandleValueType Increment(THandleValueType val)

Parameters

Type	Name	Description
THandleValueType	val	The value to increment.

Returns

Type	Description
THandleValueType	The incremented value.

InvokeValueChangedCallbacks()

Called when the value of the slider has changed via the value property.

Declaration

protected virtual void InvokeValueChangedCallbacks()

OnDirectionChanged(ContextChangedEvent<DirContext>)

Event callback called when the direction of the layout has changed.

Declaration

protected virtual void OnDirectionChanged(ContextChangedEvent<DirContext> evt)

Parameters

Type	Name	Description
ContextChangedEvent<DirContext>	evt

OnGeometryChanged(GeometryChangedEvent)

Event callback called when the geometry of the slider has changed in the layout.

Declaration

protected virtual void OnGeometryChanged(GeometryChangedEvent evt)

Parameters

Type	Name	Description
GeometryChangedEvent	evt	The geometry changed event.

OnSliderRangeChanged()

Called when the low or high value of Slider has changed.

Declaration

protected virtual void OnSliderRangeChanged()

OnTrackClicked()

Called when the track has received a click event. Always check if the mouse has moved using hasMoved.

Declaration

protected virtual void OnTrackClicked()

OnTrackDown(Draggable)

Event callback called when a pointer down event is received.

Declaration

protected virtual void OnTrackDown(Draggable dragger)

Parameters

Type	Name	Description
Draggable	dragger	The dragger manipulator.

OnTrackDragged(Draggable)

Event callback called when the dragger is dragged.

Declaration

protected virtual void OnTrackDragged(Draggable dragger)

Parameters

Type	Name	Description
Draggable	dragger	The dragger manipulator.

OnTrackUp(Draggable)

Event callback called when a pointer up event is received.

Declaration

protected virtual void OnTrackUp(Draggable dragger)

Parameters

Type	Name	Description
Draggable	dragger	The dragger manipulator.

ParseHandleValueToString(THandleValueType)

Method to implement to resolve a TValueType value into a string value.

You can use ToString() for floating point value types for example.

You can also round the value if you want a specific number of decimals.

Declaration

protected virtual string ParseHandleValueToString(THandleValueType val)

Parameters

Type	Name	Description
THandleValueType	val	The `TValueType` value to convert.

Returns

Type	Description
string

ParseRawValueToString(TValueType)

Method to implement to resolve a TValueType value into a string value.

Declaration

protected virtual string ParseRawValueToString(TValueType val)

Parameters

Type	Name	Description
TValueType	val	The `TValueType` value to convert.

Returns

Type	Description
string	The converted value.

Remarks

This method is used to convert the value to a string when the user is editing the value in the input field. This must not use the formatString property.

ParseStringToValue(string, out TValueType)

Method to implement to resolve a string value into a TValueType value.

You can use TryParse(string, out float) for floating point value types for example.

Declaration

protected abstract bool ParseStringToValue(string strValue, out TValueType value)

Parameters

Type	Name	Description
string	strValue	The string value to convert.
TValueType	value	The stringThe converted value.

Returns

Type	Description
bool	True if can be parsed, False otherwise.

ParseValueToString(TValueType)

Method to implement to resolve a TValueType value into a string value.

You can use ToString() for floating point value types for example.

You can also round the value if you want a specific number of decimals.

Declaration

protected virtual string ParseValueToString(TValueType val)

Parameters

Type	Name	Description
TValueType	val	The `TValueType` value to convert.

Returns

Type	Description
string

SetValueFromDrag(float)

Custom implementation of the slider value from the drag position.

Declaration

protected virtual void SetValueFromDrag(float newPos)

Parameters

Type	Name	Description
float	newPos	The new position of the dragger.

SetValueWithoutNotify(TValueType)

Set the value of the slider without sending any event.

Declaration

public abstract void SetValueWithoutNotify(TValueType newValue)

Parameters

Type	Name	Description
TValueType	newValue	The new value of the slider.

SliderLerpUnclamped(THandleValueType, THandleValueType, float)

Method to implement which returns a value based on the linear interpolation of a given interpolant between a specific range.

Usually you can use directly LerpUnclamped(float, float, float) for floating point value types.

Declaration

protected abstract TValueType SliderLerpUnclamped(THandleValueType a, THandleValueType b, float interpolant)

Parameters

Type	Name	Description
THandleValueType	a	The lowest value in the range.
THandleValueType	b	The highest value in the range.
float	interpolant	The normalized value to process.

Returns

Type	Description
TValueType

SliderNormalizeValue(THandleValueType, THandleValueType, THandleValueType)

Method to implement which returns the normalized value of a given value in a specific range.

Usually you can use directly an InverseLerp(float, float, float) for floating point value types.

Declaration

protected abstract float SliderNormalizeValue(THandleValueType currentValue, THandleValueType lowerValue, THandleValueType higherValue)

Parameters

Type	Name	Description
THandleValueType	currentValue	The value to normalize.
THandleValueType	lowerValue	The lowest value in the range.
THandleValueType	higherValue	The highest value in the range.