TouchInputWidget.cs

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using Engine;
using Engine.Input;
 
namespace Game {
    public class TouchInputWidget : Widget {
        public int? m_touchId;
 
        public Vector2 m_touchLastPosition;
 
        public Vector2 m_touchOrigin;
 
        public Vector2 m_touchOriginLimited;
 
        public bool m_touchMoved;
 
        public double m_touchTime;
 
        public int m_touchFrameIndex;
 
        public TouchInput? m_touchInput;
 
        public float m_radius = 30f;
 
        public float Radius {
            get => m_radius;
            set => m_radius = MathUtils.Max(value, 1f);
        }
 
        public TouchInput? TouchInput {
            get {
                if (IsEnabledGlobal && IsVisibleGlobal) {
                    return m_touchInput;
                }
                return null;
            }
        }
 
        public override void Update() {
            m_touchInput = null;
            double frameStartTime = Time.FrameStartTime;
            int frameIndex = Time.FrameIndex;
            foreach (TouchLocation touchLocation in Input.TouchLocations) {
                if (touchLocation.State == TouchLocationState.Pressed) {
                    if (HitTestGlobal(touchLocation.Position) == this) {
                        m_touchId = touchLocation.Id;
                        m_touchLastPosition = touchLocation.Position;
                        m_touchOrigin = touchLocation.Position;
                        m_touchOriginLimited = touchLocation.Position;
                        m_touchTime = frameStartTime;
                        m_touchFrameIndex = frameIndex;
                        m_touchMoved = false;
                    }
                }
                else if (touchLocation.State == TouchLocationState.Moved) {
                    if (m_touchId.HasValue
                        && touchLocation.Id == m_touchId.Value) {
                        m_touchMoved |= Vector2.Distance(touchLocation.Position, m_touchOrigin) > SettingsManager.MinimumDragDistance * GlobalScale;
                        TouchInput value = default;
                        value.InputType = !m_touchMoved ? TouchInputType.Hold : TouchInputType.Move;
                        value.Duration = (float)(frameStartTime - m_touchTime);
                        value.DurationFrames = frameIndex - m_touchFrameIndex;
                        value.Position = touchLocation.Position;
                        value.Move = touchLocation.Position - m_touchLastPosition;
                        value.TotalMove = touchLocation.Position - m_touchOrigin;
                        value.TotalMoveLimited = touchLocation.Position - m_touchOriginLimited;
                        if (MathF.Abs(value.TotalMoveLimited.X) > m_radius) {
                            m_touchOriginLimited.X = touchLocation.Position.X - MathF.Sign(value.TotalMoveLimited.X) * m_radius;
                        }
                        if (MathF.Abs(value.TotalMoveLimited.Y) > m_radius) {
                            m_touchOriginLimited.Y = touchLocation.Position.Y - MathF.Sign(value.TotalMoveLimited.Y) * m_radius;
                        }
                        m_touchInput = value;
                        m_touchLastPosition = touchLocation.Position;
                    }
                }
                else if (touchLocation.State == TouchLocationState.Released
                    && m_touchId.HasValue
                    && touchLocation.Id == m_touchId.Value) {
                    if (frameStartTime - m_touchTime <= SettingsManager.MinimumHoldDuration
                        && Vector2.Distance(touchLocation.Position, m_touchOrigin) < SettingsManager.MinimumDragDistance * GlobalScale) {
                        TouchInput value2 = default;
                        value2.InputType = TouchInputType.Tap;
                        value2.Duration = (float)(frameStartTime - m_touchTime);
                        value2.DurationFrames = frameIndex - m_touchFrameIndex;
                        value2.Position = touchLocation.Position;
                        m_touchInput = value2;
                    }
                    m_touchId = null;
                }
            }
        }
    }
}