| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.documentsui.dirlist; |
| |
| import androidx.annotation.IntDef; |
| import androidx.fragment.app.FragmentTransaction; |
| |
| import android.content.Context; |
| import android.os.Bundle; |
| import android.util.AttributeSet; |
| import android.widget.LinearLayout; |
| |
| import com.android.documentsui.R; |
| import com.android.documentsui.base.Shared; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| |
| /** |
| * This class exists solely to support animated transition of our directory fragment. |
| * The structure of this class is tightly coupled with the static animations defined in |
| * res/animator, specifically the "position" property referenced by |
| * res/animator/dir_{enter,leave}.xml. |
| */ |
| public class AnimationView extends LinearLayout { |
| |
| @IntDef(flag = true, value = { |
| ANIM_NONE, |
| ANIM_SIDE, |
| ANIM_LEAVE, |
| ANIM_ENTER |
| }) |
| @Retention(RetentionPolicy.SOURCE) |
| public @interface AnimationType {} |
| public static final int ANIM_NONE = 1; |
| public static final int ANIM_SIDE = 2; |
| public static final int ANIM_LEAVE = 3; |
| public static final int ANIM_ENTER = 4; |
| |
| private float mPosition = 0f; |
| |
| // The distance the animation will cover...currently matches the height of the |
| // content area. |
| private int mSpan; |
| |
| public AnimationView(Context context) { |
| super(context); |
| } |
| |
| public AnimationView(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| @Override |
| protected void onSizeChanged(int w, int h, int oldw, int oldh) { |
| super.onSizeChanged(w, h, oldw, oldh); |
| mSpan = h; |
| setPosition(mPosition); |
| } |
| |
| public float getPosition() { |
| return mPosition; |
| } |
| |
| public void setPosition(float position) { |
| mPosition = position; |
| // Warning! If we ever decide to switch this to setX (slide left/right) |
| // please remember to add RLT variations of the animations under res/animator-ldrtl. |
| setY((mSpan > 0) ? (mPosition * mSpan) : 0); |
| |
| if (mPosition != 0) { |
| setTranslationZ(getResources().getDimensionPixelSize(R.dimen.dir_elevation)); |
| } else { |
| setTranslationZ(0); |
| } |
| } |
| |
| /** |
| * Configures custom animations on the transaction according to the specified |
| * @AnimationType. |
| */ |
| static void setupAnimations( |
| FragmentTransaction ft, @AnimationType int anim, Bundle args) { |
| switch (anim) { |
| case AnimationView.ANIM_SIDE: |
| args.putBoolean(Shared.EXTRA_IGNORE_STATE, true); |
| break; |
| case AnimationView.ANIM_ENTER: |
| // TODO: Document which behavior is being tailored |
| // by passing this bit. Remove if possible. |
| args.putBoolean(Shared.EXTRA_IGNORE_STATE, true); |
| ft.setCustomAnimations(R.animator.dir_enter, R.animator.fade_out); |
| break; |
| case AnimationView.ANIM_LEAVE: |
| ft.setCustomAnimations(R.animator.fade_in, R.animator.dir_leave); |
| break; |
| } |
| } |
| } |