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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 package org.chromium.chrome.browser.enhancedbookmarks; |
| 6 |
| 7 import android.animation.Animator; |
| 8 import android.animation.AnimatorListenerAdapter; |
| 9 import android.content.Context; |
| 10 import android.util.AttributeSet; |
| 11 import android.view.View; |
| 12 import android.widget.FrameLayout; |
| 13 import android.widget.ProgressBar; |
| 14 |
| 15 import com.google.android.apps.chrome.R; |
| 16 |
| 17 import org.chromium.ui.interpolators.BakedBezierInterpolator; |
| 18 |
| 19 /** |
| 20 * View for showing loading content animation. The animation logic follows the A
ndroid loading |
| 21 * content UI guideline. |
| 22 */ |
| 23 public class EnhancedBookmarkLoadingView extends FrameLayout { |
| 24 private static final int LOADING_ANIMATION_DELAY_MS = 500; |
| 25 private static final int MINIMUM_ANIMATION_SHOW_TIME_MS = 500; |
| 26 |
| 27 private long mStartTime = -1; |
| 28 |
| 29 private ProgressBar mLoadingProgressBar; |
| 30 |
| 31 private final Runnable mDelayedShow = new Runnable() { |
| 32 @Override |
| 33 public void run() { |
| 34 mStartTime = System.currentTimeMillis(); |
| 35 mLoadingProgressBar.setAlpha(1.0f); |
| 36 mLoadingProgressBar.setVisibility(View.VISIBLE); |
| 37 } |
| 38 }; |
| 39 |
| 40 // Material loading design spec requires us to show progress spinner at leas
t 500ms, so we need |
| 41 // this delayed runnable to implement that. |
| 42 private final Runnable mDelayedHide = new Runnable() { |
| 43 @Override |
| 44 public void run() { |
| 45 animate().alpha(0.0f).setInterpolator(BakedBezierInterpolator.TRANSF
ORM_CURVE) |
| 46 .setListener(new AnimatorListenerAdapter() { |
| 47 @Override |
| 48 public void onAnimationEnd(Animator animation) { |
| 49 setVisibility(GONE); |
| 50 } |
| 51 }); |
| 52 } |
| 53 }; |
| 54 |
| 55 /** |
| 56 * Constructor for inflating from XML. |
| 57 */ |
| 58 public EnhancedBookmarkLoadingView(Context context, AttributeSet attrs) { |
| 59 super(context, attrs); |
| 60 } |
| 61 |
| 62 @Override |
| 63 protected void onFinishInflate() { |
| 64 super.onFinishInflate(); |
| 65 mLoadingProgressBar = (ProgressBar) findViewById(R.id.eb_loading_circle)
; |
| 66 } |
| 67 |
| 68 /** |
| 69 * Show loading UI. It shows the loading animation 500ms after. |
| 70 */ |
| 71 public void showLoadingUI() { |
| 72 removeCallbacks(mDelayedShow); |
| 73 removeCallbacks(mDelayedHide); |
| 74 |
| 75 setVisibility(VISIBLE); |
| 76 setAlpha(1.0f); |
| 77 mLoadingProgressBar.setVisibility(GONE); |
| 78 |
| 79 postDelayed(mDelayedShow, LOADING_ANIMATION_DELAY_MS); |
| 80 } |
| 81 |
| 82 /** |
| 83 * Hide loading UI. If progress bar is not shown, it disappears immediately.
If so, it smoothly |
| 84 * fades out. |
| 85 */ |
| 86 public void hideLoadingUI() { |
| 87 removeCallbacks(mDelayedShow); |
| 88 removeCallbacks(mDelayedHide); |
| 89 |
| 90 if (mLoadingProgressBar.getVisibility() == VISIBLE) { |
| 91 postDelayed(mDelayedHide, Math.max(0, |
| 92 mStartTime + MINIMUM_ANIMATION_SHOW_TIME_MS - System.current
TimeMillis())); |
| 93 } else { |
| 94 setVisibility(GONE); |
| 95 } |
| 96 } |
| 97 } |
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