private void Start()
{
startHeight = buttons[0].GetComponent <RectTransform>().rect.height;
buttonRects = new RectTransform[buttons.Length];
buttonBoxes = new Image[buttons.Length];
buttonTexts = new TextMeshProUGUI[buttons.Length];
for (int x = 0; x < buttons.Length; x++)
{
buttonRects[x] = buttons[x].GetComponent <RectTransform>();
buttonBoxes[x] = buttons[x].GetComponent <Image>();
buttonTexts[x] = buttons[x].GetComponentInChildren <TextMeshProUGUI>();
RectTransformAssistant.SetHeight(buttonRects[x], 0);
buttons[x].SetActive(false);
}
buttonsVisible = new bool[buttons.Length];
}
/* Animates buttons either appearing or disappearing.
* @param buttonRect Rect to animate. Shrink/expand height.
* @param buttonIndex Index of animating button.
*/
IEnumerator ButtonAnim(RectTransform buttonRect, int buttonIndex)
{
if (buttonsVisible[buttonIndex])
{
buttons[buttonIndex].SetActive(true);
buttons[buttonIndex].GetComponent <Button>().interactable = false;
buttonBoxes[buttonIndex].CrossFadeAlpha(1, FADE_TIME, false);
buttonTexts[buttonIndex].CrossFadeAlpha(1, FADE_TIME, false);
while (buttonRect.rect.height < startHeight - LERPING_THRESHOLD)
{
RectTransformAssistant.SetHeight(
buttonRect,
Mathf.Lerp(RectTransformAssistant.GetHeight(buttonRect), startHeight, 1 / GROWING_SMOOTHNESS));
yield return(new WaitForFixedUpdate());
}
RectTransformAssistant.SetHeight(buttonRect, startHeight);
buttons[buttonIndex].GetComponent <Button>().interactable = true;
buttonRect.rect.Set(buttonRect.rect.x, buttonRect.rect.y, buttonRect.rect.width, startHeight);
}
else
{
buttons[buttonIndex].GetComponent <Button>().interactable = false;
buttonBoxes[buttonIndex].CrossFadeAlpha(0, FADE_TIME, false);
buttonTexts[buttonIndex].CrossFadeAlpha(0, FADE_TIME, false);
float timeToStopShrink = Time.time + FADE_TIME;
while (timeToStopShrink > Time.time)
{
RectTransformAssistant.SetHeight(
buttonRect,
Mathf.Lerp(RectTransformAssistant.GetHeight(buttonRect), 0, 1 / SHRINKING_SMOOTHNESS));
yield return(new WaitForFixedUpdate());
}
buttonRect.rect.Set(buttonRect.rect.x, buttonRect.rect.y, buttonRect.rect.width, 0);
buttons[buttonIndex].SetActive(false);
}
}
