packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationIconContainer.java - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2016 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.systemui.statusbar.phone;

 import android.content.Context;
 import android.content.res.Configuration;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.util.AttributeSet;
 import android.view.View;

 import com.android.systemui.R;
 import com.android.systemui.statusbar.AlphaOptimizedFrameLayout;
 import com.android.systemui.statusbar.StatusBarIconView;
 import com.android.systemui.statusbar.stack.AnimationFilter;
 import com.android.systemui.statusbar.stack.AnimationProperties;
 import com.android.systemui.statusbar.stack.ViewState;

 import java.util.WeakHashMap;

 /**
  * A container for notification icons. It handles overflowing icons properly and positions them
  * correctly on the screen.
  */
 public class NotificationIconContainer extends AlphaOptimizedFrameLayout {
     private static final String TAG = "NotificationIconContainer";
     private static final boolean DEBUG = false;
     private static final AnimationProperties DOT_ANIMATION_PROPERTIES = new AnimationProperties() {
         private AnimationFilter mAnimationFilter = new AnimationFilter().animateX();

         @Override
         public AnimationFilter getAnimationFilter() {
             return mAnimationFilter;
         }
     }.setDuration(200);

     private static final AnimationProperties ADD_ICON_PROPERTIES = new AnimationProperties() {
         private AnimationFilter mAnimationFilter = new AnimationFilter().animateAlpha();

         @Override
         public AnimationFilter getAnimationFilter() {
             return mAnimationFilter;
         }
     }.setDuration(200).setDelay(50);

     private boolean mShowAllIcons = true;
     private WeakHashMap<View, IconState> mIconStates = new WeakHashMap<>();
     private int mDotPadding;
     private int mStaticDotRadius;
     private int mActualLayoutWidth = -1;
     private float mActualPaddingEnd = -1;
     private float mActualPaddingStart = -1;
     private boolean mChangingViewPositions;
     private int mAnimationStartIndex = -1;

     public NotificationIconContainer(Context context, AttributeSet attrs) {
         super(context, attrs);
         initDimens();
         setWillNotDraw(!DEBUG);
     }

     private void initDimens() {
         mDotPadding = getResources().getDimensionPixelSize(R.dimen.overflow_icon_dot_padding);
         mStaticDotRadius = getResources().getDimensionPixelSize(R.dimen.overflow_dot_radius);
     }

     @Override
     protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);
         Paint paint = new Paint();
         paint.setColor(Color.RED);
         paint.setStyle(Paint.Style.STROKE);
         canvas.drawRect(getActualPaddingStart(), 0, getLayoutEnd(), getHeight(), paint);
     }

     @Override
     protected void onConfigurationChanged(Configuration newConfig) {
         super.onConfigurationChanged(newConfig);
         initDimens();
     }
     @Override
     protected void onLayout(boolean changed, int l, int t, int r, int b) {
         float centerY = getHeight() / 2.0f;
         // we layout all our children on the left at the top
         for (int i = 0; i < getChildCount(); i++) {
             View child = getChildAt(i);
             // We need to layout all children even the GONE ones, such that the heights are
             // calculated correctly as they are used to calculate how many we can fit on the screen
             int width = child.getMeasuredWidth();
             int height = child.getMeasuredHeight();
             int top = (int) (centerY - height / 2.0f);
             child.layout(0, top, width, top + height);
         }
         if (mShowAllIcons) {
             resetViewStates();
             calculateIconTranslations();
             applyIconStates();
         }
     }

     public void applyIconStates() {
         for (int i = 0; i < getChildCount(); i++) {
             View child = getChildAt(i);
             ViewState childState = mIconStates.get(child);
             if (childState != null) {
                 childState.applyToView(child);
             }
         }
         mAnimationStartIndex = -1;
     }

     @Override
     public void onViewAdded(View child) {
         super.onViewAdded(child);
         if (!mChangingViewPositions) {
             mIconStates.put(child, new IconState());
         }
         int childIndex = indexOfChild(child);
         if (childIndex < getChildCount() - 1
             && mIconStates.get(getChildAt(childIndex + 1)).iconAppearAmount > 0.0f) {
             if (mAnimationStartIndex < 0) {
                 mAnimationStartIndex = childIndex;
             } else {
                 mAnimationStartIndex = Math.min(mAnimationStartIndex, childIndex);
             }
         }
     }

     @Override
     public void onViewRemoved(View child) {
         super.onViewRemoved(child);
         if (child instanceof StatusBarIconView) {
             final StatusBarIconView icon = (StatusBarIconView) child;
             if (icon.getVisibleState() != StatusBarIconView.STATE_HIDDEN
                     && child.getVisibility() == VISIBLE) {
                 int animationStartIndex = findFirstViewIndexAfter(icon.getTranslationX());
                 if (mAnimationStartIndex < 0) {
                     mAnimationStartIndex = animationStartIndex;
                 } else {
                     mAnimationStartIndex = Math.min(mAnimationStartIndex, animationStartIndex);
                 }
             }
             if (!mChangingViewPositions) {
                 mIconStates.remove(child);
                 addTransientView(icon, 0);
                 icon.setVisibleState(StatusBarIconView.STATE_HIDDEN, true /* animate */,
                         () -> removeTransientView(icon));
             }
         }
     }

     /**
      * Finds the first view with a translation bigger then a given value
      */
     private int findFirstViewIndexAfter(float translationX) {
         for (int i = 0; i < getChildCount(); i++) {
             View view = getChildAt(i);
             if (view.getTranslationX() > translationX) {
                 return i;
             }
         }
         return getChildCount();
     }

     public WeakHashMap<View, IconState> resetViewStates() {
         for (int i = 0; i < getChildCount(); i++) {
             View view = getChildAt(i);
             ViewState iconState = mIconStates.get(view);
             iconState.initFrom(view);
             iconState.alpha = 1.0f;
         }
         return mIconStates;
     }

     /**
      * Calulate the horizontal translations for each notification based on how much the icons
      * are inserted into the notification container.
      * If this is not a whole number, the fraction means by how much the icon is appearing.
      */
     public void calculateIconTranslations() {
         float translationX = getActualPaddingStart();
         int overflowingIconIndex = -1;
         int lastTwoIconWidth = 0;
         int childCount = getChildCount();
         for (int i = 0; i < childCount; i++) {
             View view = getChildAt(i);
             IconState iconState = mIconStates.get(view);
             iconState.xTranslation = translationX;
             iconState.visibleState = StatusBarIconView.STATE_ICON;
             translationX += iconState.iconAppearAmount * view.getWidth();
             if (translationX > getLayoutEnd()) {
                 // we are overflowing it with this icon
                 overflowingIconIndex = i - 1;
                 lastTwoIconWidth = view.getWidth();
                 break;
             }
         }
         if (overflowingIconIndex != -1) {
             int numDots = 1;
             View overflowIcon = getChildAt(overflowingIconIndex);
             IconState overflowState = mIconStates.get(overflowIcon);
             lastTwoIconWidth += overflowIcon.getWidth();
             int dotWidth = mStaticDotRadius * 2 + mDotPadding;
             int totalDotLength = mStaticDotRadius * 6 + 2 * mDotPadding;
             translationX = (getLayoutEnd() - lastTwoIconWidth / 2 - totalDotLength / 2)
                     - overflowIcon.getWidth() * 0.3f + mStaticDotRadius;
             float overflowStart = getLayoutEnd() - lastTwoIconWidth;
             float overlapAmount = (overflowState.xTranslation - overflowStart)
                     / overflowIcon.getWidth();
             translationX += overlapAmount * dotWidth;
             for (int i = overflowingIconIndex; i < childCount; i++) {
                 View view = getChildAt(i);
                 IconState iconState = mIconStates.get(view);
                 iconState.xTranslation = translationX;
                 if (numDots <= 3) {
                     iconState.visibleState = StatusBarIconView.STATE_DOT;
                     translationX += numDots == 3 ? 3 * dotWidth : dotWidth;
                 } else {
                     iconState.visibleState = StatusBarIconView.STATE_HIDDEN;
                 }
                 numDots++;
             }
         }
         if (isLayoutRtl()) {
             for (int i = 0; i < childCount; i++) {
                 View view = getChildAt(i);
                 IconState iconState = mIconStates.get(view);
                 iconState.xTranslation = getWidth() - iconState.xTranslation - view.getWidth();
             }
         }
     }

     private float getLayoutEnd() {
         return getActualWidth() - getActualPaddingEnd();
     }

     private float getActualPaddingEnd() {
         if (mActualPaddingEnd < 0) {
             return getPaddingEnd();
         }
         return mActualPaddingEnd;
     }

     private float getActualPaddingStart() {
         if (mActualPaddingStart < 0) {
             return getPaddingStart();
         }
         return mActualPaddingStart;
     }

     /**
      * Sets whether the layout should always show all icons.
      * If this is true, the icon positions will be updated on layout.
      * If this if false, the layout is managed from the outside and layouting won't trigger a
      * repositioning of the icons.
      */
     public void setShowAllIcons(boolean showAllIcons) {
         mShowAllIcons = showAllIcons;
     }

     public void setActualLayoutWidth(int actualLayoutWidth) {
         mActualLayoutWidth = actualLayoutWidth;
         if (DEBUG) {
             invalidate();
         }
     }

     public void setActualPaddingEnd(float paddingEnd) {
         mActualPaddingEnd = paddingEnd;
         if (DEBUG) {
             invalidate();
         }
     }

     public void setActualPaddingStart(float paddingStart) {
         mActualPaddingStart = paddingStart;
         if (DEBUG) {
             invalidate();
         }
     }

     public int getActualWidth() {
         if (mActualLayoutWidth < 0) {
             return getWidth();
         }
         return mActualLayoutWidth;
     }

     public void setChangingViewPositions(boolean changingViewPositions) {
         mChangingViewPositions = changingViewPositions;
     }

     public class IconState extends ViewState {
         public float iconAppearAmount = 1.0f;
         public int visibleState;
         public boolean justAdded = true;

         @Override
         public void applyToView(View view) {
             if (view instanceof StatusBarIconView) {
                 StatusBarIconView icon = (StatusBarIconView) view;
                 AnimationProperties animationProperties = DOT_ANIMATION_PROPERTIES;
                 if (justAdded) {
                     super.applyToView(icon);
                     icon.setAlpha(0.0f);
                     icon.setVisibleState(StatusBarIconView.STATE_HIDDEN, false /* animate */);
                     animationProperties = ADD_ICON_PROPERTIES;
                 }
                 boolean animate = visibleState != icon.getVisibleState() || justAdded;
                 if (!animate && mAnimationStartIndex >= 0
                         && (icon.getVisibleState() != StatusBarIconView.STATE_HIDDEN
                             || visibleState != StatusBarIconView.STATE_HIDDEN)) {
                     int viewIndex = indexOfChild(view);
                     animate = viewIndex >= mAnimationStartIndex;
                 }
                 icon.setVisibleState(visibleState);
                 if (animate) {
                     animateTo(icon, animationProperties);
                 } else {
                     super.applyToView(view);
                 }
             }
             justAdded = false;
         }
     }
 }
	/*
	* Copyright (C) 2016 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.systemui.statusbar.phone;

	import android.content.Context;
	import android.content.res.Configuration;
	import android.graphics.Canvas;
	import android.graphics.Color;
	import android.graphics.Paint;
	import android.util.AttributeSet;
	import android.view.View;

	import com.android.systemui.R;
	import com.android.systemui.statusbar.AlphaOptimizedFrameLayout;
	import com.android.systemui.statusbar.StatusBarIconView;
	import com.android.systemui.statusbar.stack.AnimationFilter;
	import com.android.systemui.statusbar.stack.AnimationProperties;
	import com.android.systemui.statusbar.stack.ViewState;

	import java.util.WeakHashMap;

	/**
	* A container for notification icons. It handles overflowing icons properly and positions them
	* correctly on the screen.
	*/
	public class NotificationIconContainer extends AlphaOptimizedFrameLayout {
	private static final String TAG = "NotificationIconContainer";
	private static final boolean DEBUG = false;
	private static final AnimationProperties DOT_ANIMATION_PROPERTIES = new AnimationProperties() {
	private AnimationFilter mAnimationFilter = new AnimationFilter().animateX();

	@Override
	public AnimationFilter getAnimationFilter() {
	return mAnimationFilter;
	}
	}.setDuration(200);

	private static final AnimationProperties ADD_ICON_PROPERTIES = new AnimationProperties() {
	private AnimationFilter mAnimationFilter = new AnimationFilter().animateAlpha();

	@Override
	public AnimationFilter getAnimationFilter() {
	return mAnimationFilter;
	}
	}.setDuration(200).setDelay(50);

	private boolean mShowAllIcons = true;
	private WeakHashMap<View, IconState> mIconStates = new WeakHashMap<>();
	private int mDotPadding;
	private int mStaticDotRadius;
	private int mActualLayoutWidth = -1;
	private float mActualPaddingEnd = -1;
	private float mActualPaddingStart = -1;
	private boolean mChangingViewPositions;
	private int mAnimationStartIndex = -1;

	public NotificationIconContainer(Context context, AttributeSet attrs) {
	super(context, attrs);
	initDimens();
	setWillNotDraw(!DEBUG);
	}

	private void initDimens() {
	mDotPadding = getResources().getDimensionPixelSize(R.dimen.overflow_icon_dot_padding);
	mStaticDotRadius = getResources().getDimensionPixelSize(R.dimen.overflow_dot_radius);
	}

	@Override
	protected void onDraw(Canvas canvas) {
	super.onDraw(canvas);
	Paint paint = new Paint();
	paint.setColor(Color.RED);
	paint.setStyle(Paint.Style.STROKE);
	canvas.drawRect(getActualPaddingStart(), 0, getLayoutEnd(), getHeight(), paint);
	}

	@Override
	protected void onConfigurationChanged(Configuration newConfig) {
	super.onConfigurationChanged(newConfig);
	initDimens();
	}
	@Override
	protected void onLayout(boolean changed, int l, int t, int r, int b) {
	float centerY = getHeight() / 2.0f;
	// we layout all our children on the left at the top
	for (int i = 0; i < getChildCount(); i++) {
	View child = getChildAt(i);
	// We need to layout all children even the GONE ones, such that the heights are
	// calculated correctly as they are used to calculate how many we can fit on the screen
	int width = child.getMeasuredWidth();
	int height = child.getMeasuredHeight();
	int top = (int) (centerY - height / 2.0f);
	child.layout(0, top, width, top + height);
	}
	if (mShowAllIcons) {
	resetViewStates();
	calculateIconTranslations();
	applyIconStates();
	}
	}

	public void applyIconStates() {
	for (int i = 0; i < getChildCount(); i++) {
	View child = getChildAt(i);
	ViewState childState = mIconStates.get(child);
	if (childState != null) {
	childState.applyToView(child);
	}
	}
	mAnimationStartIndex = -1;
	}

	@Override
	public void onViewAdded(View child) {
	super.onViewAdded(child);
	if (!mChangingViewPositions) {
	mIconStates.put(child, new IconState());
	}
	int childIndex = indexOfChild(child);
	if (childIndex < getChildCount() - 1
	&& mIconStates.get(getChildAt(childIndex + 1)).iconAppearAmount > 0.0f) {
	if (mAnimationStartIndex < 0) {
	mAnimationStartIndex = childIndex;
	} else {
	mAnimationStartIndex = Math.min(mAnimationStartIndex, childIndex);
	}
	}
	}

	@Override
	public void onViewRemoved(View child) {
	super.onViewRemoved(child);
	if (child instanceof StatusBarIconView) {
	final StatusBarIconView icon = (StatusBarIconView) child;
	if (icon.getVisibleState() != StatusBarIconView.STATE_HIDDEN
	&& child.getVisibility() == VISIBLE) {
	int animationStartIndex = findFirstViewIndexAfter(icon.getTranslationX());
	if (mAnimationStartIndex < 0) {
	mAnimationStartIndex = animationStartIndex;
	} else {
	mAnimationStartIndex = Math.min(mAnimationStartIndex, animationStartIndex);
	}
	}
	if (!mChangingViewPositions) {
	mIconStates.remove(child);
	addTransientView(icon, 0);
	icon.setVisibleState(StatusBarIconView.STATE_HIDDEN, true /* animate */,
	() -> removeTransientView(icon));
	}
	}
	}

	/**
	* Finds the first view with a translation bigger then a given value
	*/
	private int findFirstViewIndexAfter(float translationX) {
	for (int i = 0; i < getChildCount(); i++) {
	View view = getChildAt(i);
	if (view.getTranslationX() > translationX) {
	return i;
	}
	}
	return getChildCount();
	}

	public WeakHashMap<View, IconState> resetViewStates() {
	for (int i = 0; i < getChildCount(); i++) {
	View view = getChildAt(i);
	ViewState iconState = mIconStates.get(view);
	iconState.initFrom(view);
	iconState.alpha = 1.0f;
	}
	return mIconStates;
	}

	/**
	* Calulate the horizontal translations for each notification based on how much the icons
	* are inserted into the notification container.
	* If this is not a whole number, the fraction means by how much the icon is appearing.
	*/
	public void calculateIconTranslations() {
	float translationX = getActualPaddingStart();
	int overflowingIconIndex = -1;
	int lastTwoIconWidth = 0;
	int childCount = getChildCount();
	for (int i = 0; i < childCount; i++) {
	View view = getChildAt(i);
	IconState iconState = mIconStates.get(view);
	iconState.xTranslation = translationX;
	iconState.visibleState = StatusBarIconView.STATE_ICON;
	translationX += iconState.iconAppearAmount * view.getWidth();
	if (translationX > getLayoutEnd()) {
	// we are overflowing it with this icon
	overflowingIconIndex = i - 1;
	lastTwoIconWidth = view.getWidth();
	break;
	}
	}
	if (overflowingIconIndex != -1) {
	int numDots = 1;
	View overflowIcon = getChildAt(overflowingIconIndex);
	IconState overflowState = mIconStates.get(overflowIcon);
	lastTwoIconWidth += overflowIcon.getWidth();
	int dotWidth = mStaticDotRadius * 2 + mDotPadding;
	int totalDotLength = mStaticDotRadius * 6 + 2 * mDotPadding;
	translationX = (getLayoutEnd() - lastTwoIconWidth / 2 - totalDotLength / 2)
	- overflowIcon.getWidth() * 0.3f + mStaticDotRadius;
	float overflowStart = getLayoutEnd() - lastTwoIconWidth;
	float overlapAmount = (overflowState.xTranslation - overflowStart)
	/ overflowIcon.getWidth();
	translationX += overlapAmount * dotWidth;
	for (int i = overflowingIconIndex; i < childCount; i++) {
	View view = getChildAt(i);
	IconState iconState = mIconStates.get(view);
	iconState.xTranslation = translationX;
	if (numDots <= 3) {
	iconState.visibleState = StatusBarIconView.STATE_DOT;
	translationX += numDots == 3 ? 3 * dotWidth : dotWidth;
	} else {
	iconState.visibleState = StatusBarIconView.STATE_HIDDEN;
	}
	numDots++;
	}
	}
	if (isLayoutRtl()) {
	for (int i = 0; i < childCount; i++) {
	View view = getChildAt(i);
	IconState iconState = mIconStates.get(view);
	iconState.xTranslation = getWidth() - iconState.xTranslation - view.getWidth();
	}
	}
	}

	private float getLayoutEnd() {
	return getActualWidth() - getActualPaddingEnd();
	}

	private float getActualPaddingEnd() {
	if (mActualPaddingEnd < 0) {
	return getPaddingEnd();
	}
	return mActualPaddingEnd;
	}

	private float getActualPaddingStart() {
	if (mActualPaddingStart < 0) {
	return getPaddingStart();
	}
	return mActualPaddingStart;
	}

	/**
	* Sets whether the layout should always show all icons.
	* If this is true, the icon positions will be updated on layout.
	* If this if false, the layout is managed from the outside and layouting won't trigger a
	* repositioning of the icons.
	*/
	public void setShowAllIcons(boolean showAllIcons) {
	mShowAllIcons = showAllIcons;
	}

	public void setActualLayoutWidth(int actualLayoutWidth) {
	mActualLayoutWidth = actualLayoutWidth;
	if (DEBUG) {
	invalidate();
	}
	}

	public void setActualPaddingEnd(float paddingEnd) {
	mActualPaddingEnd = paddingEnd;
	if (DEBUG) {
	invalidate();
	}
	}

	public void setActualPaddingStart(float paddingStart) {
	mActualPaddingStart = paddingStart;
	if (DEBUG) {
	invalidate();
	}
	}

	public int getActualWidth() {
	if (mActualLayoutWidth < 0) {
	return getWidth();
	}
	return mActualLayoutWidth;
	}

	public void setChangingViewPositions(boolean changingViewPositions) {
	mChangingViewPositions = changingViewPositions;
	}

	public class IconState extends ViewState {
	public float iconAppearAmount = 1.0f;
	public int visibleState;
	public boolean justAdded = true;

	@Override
	public void applyToView(View view) {
	if (view instanceof StatusBarIconView) {
	StatusBarIconView icon = (StatusBarIconView) view;
	AnimationProperties animationProperties = DOT_ANIMATION_PROPERTIES;
	if (justAdded) {
	super.applyToView(icon);
	icon.setAlpha(0.0f);
	icon.setVisibleState(StatusBarIconView.STATE_HIDDEN, false /* animate */);
	animationProperties = ADD_ICON_PROPERTIES;
	}
	boolean animate = visibleState != icon.getVisibleState() \|\| justAdded;
	if (!animate && mAnimationStartIndex >= 0
	&& (icon.getVisibleState() != StatusBarIconView.STATE_HIDDEN
	\|\| visibleState != StatusBarIconView.STATE_HIDDEN)) {
	int viewIndex = indexOfChild(view);
	animate = viewIndex >= mAnimationStartIndex;
	}
	icon.setVisibleState(visibleState);
	if (animate) {
	animateTo(icon, animationProperties);
	} else {
	super.applyToView(view);
	}
	}
	justAdded = false;
	}
	}
	}