124 lines
4.0 KiB
C#
124 lines
4.0 KiB
C#
// Copyright 2016 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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using UnityEngine;
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using UnityEngine.UI;
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using UnityEngine.EventSystems;
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using System.Collections;
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/// Jumps to a specified page in a PagedScrollRect when it is clicked on.
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public class JumpToPage : MonoBehaviour, IPointerClickHandler, IPointerEnterHandler, IPointerExitHandler {
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#if UNITY_HAS_GOOGLEVR && (UNITY_ANDROID || UNITY_EDITOR)
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[Tooltip("Destination page.")]
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public RectTransform page;
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[Tooltip("The transform to modify when the pointer is hovering over this script.")]
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public RectTransform hoverTransform;
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[Range(0.01f, 0.5f)]
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[Tooltip("Tile forward distance when the pointer over the tile.")]
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public float hoverPositionZMeters = 0.225f;
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[Range(1.0f, 10.0f)]
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[Tooltip("Speed used for lerping the rotation/scale/position of the tile.")]
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public float interpolationSpeed = 8.0f;
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private Graphic graphic;
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private float desiredPositionZ;
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/// The scroll rect that owns the destination page.
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public PagedScrollRect PageOwnerScrollRect {
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get {
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if (cachedPagedScrollRect != null) {
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return cachedPagedScrollRect;
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}
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if (page != null) {
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cachedPagedScrollRect = page.GetComponentInParent<PagedScrollRect>();
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}
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return cachedPagedScrollRect;
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}
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}
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private PagedScrollRect cachedPagedScrollRect;
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public bool CanClick {
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get {
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if (PageOwnerScrollRect != null) {
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bool isActivePage = PageOwnerScrollRect.ActivePage == page;
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return !PageOwnerScrollRect.IsMoving && !isActivePage;
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}
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return false;
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}
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}
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void Awake() {
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graphic = GetComponent<Graphic>();
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if (graphic == null) {
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Debug.LogWarning("Graphic is null, won't be able to click on JumpToPage.");
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}
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}
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void OnEnable() {
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cachedPagedScrollRect = null;
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}
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void OnDisable() {
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cachedPagedScrollRect = null;
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}
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void Update() {
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if (graphic != null) {
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graphic.raycastTarget = CanClick;
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}
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float finalDesiredPositionZ = desiredPositionZ;
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if (!CanClick) {
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finalDesiredPositionZ = 0.0f;
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}
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if (hoverTransform != null && finalDesiredPositionZ != hoverTransform.localPosition.z) {
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Vector3 localPosition = hoverTransform.localPosition;
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Vector3 desiredPosition = localPosition;
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desiredPosition.z = finalDesiredPositionZ;
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localPosition = Vector3.Lerp(localPosition, desiredPosition, Time.deltaTime * interpolationSpeed);
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hoverTransform.localPosition = localPosition;
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}
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}
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#endif // UNITY_HAS_GOOGLEVR && (UNITY_ANDROID || UNITY_EDITOR)
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public void OnPointerEnter(PointerEventData eventData) {
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#if UNITY_HAS_GOOGLEVR && (UNITY_ANDROID || UNITY_EDITOR)
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// Since canvas graphics render facing the negative Z direction,
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// negative z is the forward direction for a canvas element.
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float metersToCanvasScale = GvrUIHelpers.GetMetersToCanvasScale(page);
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desiredPositionZ = -hoverPositionZMeters / metersToCanvasScale;
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#endif // UNITY_HAS_GOOGLEVR && (UNITY_ANDROID || UNITY_EDITOR)
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}
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public void OnPointerExit(PointerEventData eventData) {
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#if UNITY_HAS_GOOGLEVR && (UNITY_ANDROID || UNITY_EDITOR)
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desiredPositionZ = 0.0f;
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#endif // UNITY_HAS_GOOGLEVR && (UNITY_ANDROID || UNITY_EDITOR)
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}
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public void OnPointerClick(PointerEventData eventData) {
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#if UNITY_HAS_GOOGLEVR && (UNITY_ANDROID || UNITY_EDITOR)
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if (CanClick) {
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PageOwnerScrollRect.SnapToVisiblePage(page);
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}
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#endif // UNITY_HAS_GOOGLEVR && (UNITY_ANDROID || UNITY_EDITOR)
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}
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}
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