349 lines
11 KiB
Java
349 lines
11 KiB
Java
/*
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* Copyright (C) 2015 Hippo Seven
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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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* 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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*/
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package com.hippo.widget;
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import android.animation.Animator;
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import android.animation.ObjectAnimator;
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import android.animation.PropertyValuesHolder;
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import android.content.Context;
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import android.os.Build;
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import android.os.Bundle;
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import android.os.Parcelable;
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import android.support.annotation.NonNull;
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import android.util.AttributeSet;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.animation.Interpolator;
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import com.hippo.animation.SimpleAnimatorListener;
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import com.hippo.ehviewer.R;
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import com.hippo.util.InterpolatorUtils;
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public class FabLayout extends ViewGroup implements View.OnClickListener {
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private static long ANIMATE_TIME = 300l;
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private static final String STATE_KEY_SUPER = "super";
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private static final String STATE_KEY_AUTO_CANCEL = "auto_cancel";
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private static final String STATE_KEY_EXPANDED = "expanded";
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private int mInterval;
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private boolean mFirst = true;
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private boolean mExpanded = false;
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private boolean mAutoCancel = true;
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private float mMainFabCenterY = -1f;
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private OnCancelListener mOnCancelListener;
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public FabLayout(Context context) {
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super(context);
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init(context);
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}
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public FabLayout(Context context, AttributeSet attrs) {
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super(context, attrs);
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init(context);
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}
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public FabLayout(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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init(context);
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}
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private void init(Context context) {
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setSoundEffectsEnabled(false);
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mInterval = context.getResources().getDimensionPixelOffset(R.dimen.floating_action_bar_layout_interval);
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}
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@Override
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public void addView(@NonNull View child, int index, ViewGroup.LayoutParams params) {
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if (!(child instanceof FloatingActionButton)) {
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throw new IllegalStateException("FloatingActionBarLayout should only " +
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"contain FloatingActionButton, but try to add "+ child.getClass().getName());
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}
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super.addView(child, index, params);
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}
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public FloatingActionButton getPrimaryFab() {
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View v = getChildAt(getChildCount() - 1);
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if (v == null) {
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return null;
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} else {
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return (FloatingActionButton) v;
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}
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}
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public int getSecondaryFabCount() {
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return Math.max(0, getChildCount() - 1);
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}
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public FloatingActionButton getSecondaryFabAt(int index) {
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if (index < 0 || index >= getSecondaryFabCount()) {
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return null;
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}
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return (FloatingActionButton) getChildAt(index);
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}
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private int getChildMeasureSpec(int parentMeasureSpec) {
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int parentMode = MeasureSpec.getMode(parentMeasureSpec);
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int parentSize = MeasureSpec.getSize(parentMeasureSpec);
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int childMode;
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int childSize;
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switch (parentMode) {
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default:
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case MeasureSpec.AT_MOST:
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case MeasureSpec.EXACTLY:
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childMode = MeasureSpec.AT_MOST;
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childSize = parentSize;
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break;
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case MeasureSpec.UNSPECIFIED:
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childMode = MeasureSpec.UNSPECIFIED;
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childSize = parentSize;
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}
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return MeasureSpec.makeMeasureSpec(childSize, childMode);
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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if (mFirst) {
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mFirst = false;
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boolean expanded = mExpanded;
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int count = getChildCount() - 1;
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for (int i = 0; i < count; i++) {
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getChildAt(i).setVisibility(expanded ? View.VISIBLE : View.INVISIBLE);
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}
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}
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int childWidthMeasureSpec = getChildMeasureSpec(widthMeasureSpec);
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int childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec);
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measureChildren(childWidthMeasureSpec, childHeightMeasureSpec);
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int maxWidth = 0;
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int maxHeight = 0;
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boolean firstChild = true;
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int count = getChildCount();
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for (int i = 0; i < count; i++) {
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View child = getChildAt(i);
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if (child.getVisibility() == View.GONE) {
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continue;
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}
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maxWidth = Math.max(maxWidth, child.getMeasuredWidth());
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maxHeight = maxHeight + child.getMeasuredHeight();
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if (firstChild) {
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firstChild = false;
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} else {
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maxHeight += mInterval;
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}
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}
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// Account for padding too
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maxWidth += getPaddingLeft() + getPaddingRight();
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maxHeight += getPaddingTop() + getPaddingBottom();
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// Check against minimum height and width
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maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight());
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maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth());
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setMeasuredDimension(resolveSizeAndState(maxWidth, widthMeasureSpec, 0),
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resolveSizeAndState(maxHeight, heightMeasureSpec, 0));
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}
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@Override
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protected void onLayout(boolean changed, int l, int t, int r, int b) {
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int interval = mInterval;
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int centerX = 0;
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int bottom = getMeasuredHeight() - getPaddingBottom();
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int count = getChildCount();
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int i = count;
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while(--i >= 0) {
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View child = getChildAt(i);
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if (child.getVisibility() == View.GONE) {
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continue;
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}
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int childWidth = child.getMeasuredWidth();
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int childHeight = child.getMeasuredHeight();
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int right;
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if (i == count - 1) {
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right = getMeasuredWidth() - getPaddingRight();
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} else {
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right = centerX + (childWidth / 2);
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}
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child.layout(right - childWidth, bottom - childHeight, right, bottom);
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if (i == count - 1) {
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centerX = right - (childWidth / 2);
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mMainFabCenterY = bottom - (childHeight / 2f);
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}
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bottom -= (childHeight + interval);
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}
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}
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public void setOnCancelListener(OnCancelListener listener) {
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mOnCancelListener = listener;
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}
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public void setAutoCancel(boolean autoCancel) {
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if (mAutoCancel != autoCancel) {
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mAutoCancel = autoCancel;
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if (mExpanded) {
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if (autoCancel) {
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setOnClickListener(this);
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} else {
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setClickable(false);
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}
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}
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}
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}
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public void toggle() {
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setExpanded(!mExpanded);
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}
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public boolean isExpanded() {
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return mExpanded;
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}
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public void setExpanded(boolean expanded) {
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setExpanded(expanded, true);
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}
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public void setExpanded(boolean expanded, boolean animation) {
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if (mExpanded != expanded) {
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mExpanded = expanded;
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if (mAutoCancel) {
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if (expanded) {
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setOnClickListener(this);
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} else {
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setClickable(false);
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}
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}
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if (mMainFabCenterY == -1f) {
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// It is before first onLayout
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int count = getChildCount() - 1;
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for (int i = 0; i < count; i++) {
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getChildAt(i).setVisibility(expanded ? View.VISIBLE : View.INVISIBLE);
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}
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} else {
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int count = getChildCount() - 1;
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for (int i = 0; i < count; i++) {
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View child = getChildAt(i);
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if (animation) {
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setChildAnimation(child, expanded);
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} else {
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child.setVisibility(expanded ? View.VISIBLE : View.INVISIBLE);
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if (expanded) {
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child.setAlpha(1f);
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}
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}
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}
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}
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}
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}
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private void setChildAnimation(final View child, final boolean expanded) {
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float startTranslationY;
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float endTranslationY;
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float startAlpha;
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float endAlpha;
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Interpolator interpolator;
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if (expanded) {
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startTranslationY = mMainFabCenterY -
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(child.getTop() + (child.getHeight() / 2));
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endTranslationY = 0f;
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startAlpha = 0f;
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endAlpha = 1f;
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interpolator = InterpolatorUtils.FAST_SLOW_INTERPOLATOR;
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} else {
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startTranslationY = 0f;
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endTranslationY = mMainFabCenterY -
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(child.getTop() + (child.getHeight() / 2));
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startAlpha = 1f;
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endAlpha = 0f;
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interpolator = InterpolatorUtils.SLOW_FAST_INTERPOLATOR;
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}
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PropertyValuesHolder translationYPvh = PropertyValuesHolder.ofFloat(
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"translationY", startTranslationY, endTranslationY);
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PropertyValuesHolder alphaPvh = PropertyValuesHolder.ofFloat(
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"alpha", startAlpha, endAlpha);
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ObjectAnimator oa = ObjectAnimator.ofPropertyValuesHolder(child, translationYPvh, alphaPvh);
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oa.setDuration(ANIMATE_TIME);
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oa.setInterpolator(interpolator);
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
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oa.setAutoCancel(true);
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}
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oa.addListener(new SimpleAnimatorListener() {
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@Override
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public void onAnimationStart(Animator animation) {
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if (expanded) {
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child.setVisibility(View.VISIBLE);
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}
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}
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@Override
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public void onAnimationEnd(Animator animation) {
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if (!expanded) {
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child.setVisibility(View.INVISIBLE);
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}
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}
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});
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oa.start();
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}
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@Override
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public void onClick(View v) {
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setExpanded(false);
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if (mOnCancelListener != null) {
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mOnCancelListener.onCancel(this);
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}
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}
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@Override
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protected void dispatchSetPressed(boolean pressed) {
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// Don't dispatch it to children
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}
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@Override
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public Parcelable onSaveInstanceState() {
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final Bundle state = new Bundle();
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state.putParcelable(STATE_KEY_SUPER, super.onSaveInstanceState());
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state.putBoolean(STATE_KEY_AUTO_CANCEL, mAutoCancel);
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state.putBoolean(STATE_KEY_EXPANDED, mExpanded);
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return state;
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}
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@Override
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public void onRestoreInstanceState(Parcelable state) {
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if (state instanceof Bundle) {
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final Bundle savedState = (Bundle) state;
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super.onRestoreInstanceState(savedState.getParcelable(STATE_KEY_SUPER));
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setAutoCancel(savedState.getBoolean(STATE_KEY_AUTO_CANCEL));
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setExpanded(savedState.getBoolean(STATE_KEY_EXPANDED), false);
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}
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}
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public interface OnCancelListener {
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void onCancel(FabLayout fabLayout);
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}
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}
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