53 lines
2.0 KiB
C#
53 lines
2.0 KiB
C#
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using System;
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using UnityEngine.InputSystem.Layouts;
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using UnityEngine.InputSystem.LowLevel;
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using UnityEngine.InputSystem.Utilities;
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namespace UnityEngine.InputSystem.Controls
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{
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/// <summary>
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/// A button that reads its pressed state from <see cref="TouchControl.phase"/>.
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/// </summary>
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/// <remarks>
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/// This control is used by <see cref="TouchControl"/> to link <see cref="TouchControl.press"/>
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/// to <see cref="TouchControl.phase"/>. It will return 1 as long as the value of
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/// phase is <see cref="TouchPhase.Began"/>, <see cref="TouchPhase.Stationary"/>, or
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/// <see cref="TouchPhase.Moved"/>, i.e. as long as the touch is in progress. For
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/// all other phases, it will return 0.
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/// </remarks>
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/// <seealso cref="TouchControl"/>
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[InputControlLayout(hideInUI = true)]
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public class TouchPressControl : ButtonControl
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{
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/// <inheritdoc />
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protected override void FinishSetup()
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{
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base.FinishSetup();
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if (!stateBlock.format.IsIntegerFormat())
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throw new NotSupportedException(
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$"Non-integer format '{stateBlock.format}' is not supported for TouchButtonControl '{this}'");
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}
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/// <inheritdoc />
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public override unsafe float ReadUnprocessedValueFromState(void* statePtr)
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{
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var valuePtr = (byte*)statePtr + (int)m_StateBlock.byteOffset;
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var uintValue = MemoryHelpers.ReadMultipleBitsAsUInt(valuePtr, m_StateBlock.bitOffset, m_StateBlock.sizeInBits);
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var phaseValue = (TouchPhase)uintValue;
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var value = 0.0f;
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if (phaseValue == TouchPhase.Began || phaseValue == TouchPhase.Stationary ||
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phaseValue == TouchPhase.Moved)
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value = 1;
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return Preprocess(value);
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}
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public override unsafe void WriteValueIntoState(float value, void* statePtr)
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{
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throw new NotSupportedException();
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}
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}
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}
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