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Editor stuff
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/// Credit David Gileadi
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/// Sourced from - https://bitbucket.org/UnityUIExtensions/unity-ui-extensions/pull-requests/12
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using System;
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using System.Collections;
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using UnityEngine.Events;
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using UnityEngine.EventSystems;
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namespace UnityEngine.UI.Extensions
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{
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[AddComponentMenu("UI/Extensions/Segmented Control/Segment")]
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[RequireComponent(typeof(Selectable))]
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public class Segment :
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UIBehaviour,
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IPointerClickHandler,
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ISubmitHandler,
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IPointerEnterHandler, IPointerExitHandler,
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IPointerDownHandler, IPointerUpHandler,
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ISelectHandler, IDeselectHandler
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{
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internal int index;
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internal SegmentedControl segmentedControl;
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internal bool leftmost
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{
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get { return index == 0; }
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}
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internal bool rightmost
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{
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get { return index == segmentedControl.segments.Length - 1; }
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}
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public bool selected
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{
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get { return segmentedControl.selectedSegment == this.button; }
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set { SetSelected(value); }
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}
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internal Selectable button
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{
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get { return GetComponent<Selectable>(); }
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}
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internal Sprite cutSprite;
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protected Segment()
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{ }
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protected override void Start()
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{
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StartCoroutine(DelayedInit());
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}
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IEnumerator DelayedInit()
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{
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yield return null;
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yield return null;
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button.image.overrideSprite = cutSprite;
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if (selected)
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MaintainSelection();
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}
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public virtual void OnPointerClick(PointerEventData eventData)
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{
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if (eventData.button != PointerEventData.InputButton.Left)
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return;
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selected = true;
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}
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public virtual void OnPointerEnter(PointerEventData eventData)
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{
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MaintainSelection();
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}
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public virtual void OnPointerExit(PointerEventData eventData)
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{
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MaintainSelection();
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}
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public virtual void OnPointerDown(PointerEventData eventData)
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{
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MaintainSelection();
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}
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public virtual void OnPointerUp(PointerEventData eventData)
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{
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MaintainSelection();
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}
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public virtual void OnSelect(BaseEventData eventData)
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{
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MaintainSelection();
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}
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public virtual void OnDeselect(BaseEventData eventData)
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{
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MaintainSelection();
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}
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protected override void OnEnable()
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{
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base.OnEnable();
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if (segmentedControl)
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MaintainSelection();
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}
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public virtual void OnSubmit(BaseEventData eventData)
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{
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selected = true;
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}
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private void SetSelected(bool value)
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{
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if (value && button.IsActive() && button.IsInteractable())
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{
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if (segmentedControl.selectedSegment == this.button)
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{
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if (segmentedControl.allowSwitchingOff)
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{
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Deselect();
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}
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else
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{
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MaintainSelection();
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}
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}
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else
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{
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if (segmentedControl.selectedSegment)
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{
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var segment = segmentedControl.selectedSegment.GetComponent<Segment>();
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segmentedControl.selectedSegment = null;
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if (segment)
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{
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segment.TransitionButton();
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}
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}
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segmentedControl.selectedSegment = this.button;
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TransitionButton();
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segmentedControl.onValueChanged.Invoke(index);
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}
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}
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else if (segmentedControl.selectedSegment == this.button)
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{
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Deselect();
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}
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}
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private void Deselect()
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{
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segmentedControl.selectedSegment = null;
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TransitionButton();
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segmentedControl.onValueChanged.Invoke(-1);
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}
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void MaintainSelection()
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{
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if (button != segmentedControl.selectedSegment)
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return;
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TransitionButton(true);
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}
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internal void TransitionButton()
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{
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TransitionButton(false);
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}
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internal void TransitionButton(bool instant)
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{
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Color tintColor = selected ? button.colors.pressedColor : button.colors.normalColor;
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Color textColor = selected ? button.colors.normalColor : button.colors.pressedColor;
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Sprite transitionSprite = selected ? button.spriteState.pressedSprite : cutSprite;
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string triggerName = selected ? button.animationTriggers.pressedTrigger : button.animationTriggers.normalTrigger;
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switch (button.transition)
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{
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case Selectable.Transition.ColorTint:
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button.image.overrideSprite = cutSprite;
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StartColorTween(tintColor * button.colors.colorMultiplier, instant);
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ChangeTextColor(textColor * button.colors.colorMultiplier);
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break;
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case Selectable.Transition.SpriteSwap:
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if (transitionSprite != cutSprite)
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transitionSprite = SegmentedControl.CutSprite(transitionSprite, leftmost, rightmost);
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DoSpriteSwap(transitionSprite);
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break;
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case Selectable.Transition.Animation:
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button.image.overrideSprite = cutSprite;
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TriggerAnimation(triggerName);
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break;
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}
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}
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void StartColorTween(Color targetColor, bool instant)
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{
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if (button.targetGraphic == null)
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return;
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button.targetGraphic.CrossFadeColor(targetColor, instant ? 0f : button.colors.fadeDuration, true, true);
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}
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void ChangeTextColor(Color targetColor)
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{
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var text = GetComponentInChildren<Text>();
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if (!text)
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return;
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text.color = targetColor;
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}
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void DoSpriteSwap(Sprite newSprite)
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{
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if (button.image == null)
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return;
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button.image.overrideSprite = newSprite;
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}
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void TriggerAnimation(string triggername)
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{
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if (button.animator == null || !button.animator.isActiveAndEnabled || !button.animator.hasBoundPlayables || string.IsNullOrEmpty(triggername))
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return;
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button.animator.ResetTrigger(button.animationTriggers.normalTrigger);
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button.animator.ResetTrigger(button.animationTriggers.pressedTrigger);
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button.animator.ResetTrigger(button.animationTriggers.highlightedTrigger);
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button.animator.ResetTrigger(button.animationTriggers.disabledTrigger);
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button.animator.SetTrigger(triggername);
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}
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}
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}
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