com/android/systemui/statusbar/phone/StatusIconContainer.java - platform/prebuilts/fullsdk/sources/android-29 - Git at Google

 /*
  * Copyright (C) 2017 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 static com.android.systemui.statusbar.StatusBarIconView.STATE_DOT;
 import static com.android.systemui.statusbar.StatusBarIconView.STATE_HIDDEN;
 import static com.android.systemui.statusbar.StatusBarIconView.STATE_ICON;

 import android.annotation.Nullable;
 import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Paint.Style;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.View;

 import com.android.keyguard.AlphaOptimizedLinearLayout;
 import com.android.systemui.R;
 import com.android.systemui.statusbar.StatusIconDisplayable;
 import com.android.systemui.statusbar.notification.stack.AnimationFilter;
 import com.android.systemui.statusbar.notification.stack.AnimationProperties;
 import com.android.systemui.statusbar.notification.stack.ViewState;

 import java.util.ArrayList;
 import java.util.List;

 /**
  * A container for Status bar system icons. Limits the number of system icons and handles overflow
  * similar to {@link NotificationIconContainer}.
  *
  * Children are expected to implement {@link StatusIconDisplayable}
  */
 public class StatusIconContainer extends AlphaOptimizedLinearLayout {

     private static final String TAG = "StatusIconContainer";
     private static final boolean DEBUG = false;
     private static final boolean DEBUG_OVERFLOW = false;
     // Max 8 status icons including battery
     private static final int MAX_ICONS = 7;
     private static final int MAX_DOTS = 1;

     private int mDotPadding;
     private int mStaticDotDiameter;
     private int mUnderflowWidth;
     private int mUnderflowStart = 0;
     // Whether or not we can draw into the underflow space
     private boolean mNeedsUnderflow;
     // Individual StatusBarIconViews draw their etc dots centered in this width
     private int mIconDotFrameWidth;
     private boolean mShouldRestrictIcons = true;
     // Used to count which states want to be visible during layout
     private ArrayList<StatusIconState> mLayoutStates = new ArrayList<>();
     // So we can count and measure properly
     private ArrayList<View> mMeasureViews = new ArrayList<>();
     // Any ignored icon will never be added as a child
     private ArrayList<String> mIgnoredSlots = new ArrayList<>();

     public StatusIconContainer(Context context) {
         this(context, null);
     }

     public StatusIconContainer(Context context, AttributeSet attrs) {
         super(context, attrs);
         initDimens();
         setWillNotDraw(!DEBUG_OVERFLOW);
     }

     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
     }

     public void setShouldRestrictIcons(boolean should) {
         mShouldRestrictIcons = should;
     }

     public boolean isRestrictingIcons() {
         return mShouldRestrictIcons;
     }

     private void initDimens() {
         // This is the same value that StatusBarIconView uses
         mIconDotFrameWidth = getResources().getDimensionPixelSize(
                 com.android.internal.R.dimen.status_bar_icon_size);
         mDotPadding = getResources().getDimensionPixelSize(R.dimen.overflow_icon_dot_padding);
         int radius = getResources().getDimensionPixelSize(R.dimen.overflow_dot_radius);
         mStaticDotDiameter = 2 * radius;
         mUnderflowWidth = mIconDotFrameWidth + (MAX_DOTS - 1) * (mStaticDotDiameter + mDotPadding);
     }

     @Override
     protected void onLayout(boolean changed, int l, int t, int r, int b) {
         float midY = getHeight() / 2.0f;

         // Layout all child views so that we can move them around later
         for (int i = 0; i < getChildCount(); i++) {
             View child = getChildAt(i);
             int width = child.getMeasuredWidth();
             int height = child.getMeasuredHeight();
             int top = (int) (midY - height / 2.0f);
             child.layout(0, top, width, top + height);
         }

         resetViewStates();
         calculateIconTranslations();
         applyIconStates();
     }

     @Override
     protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);
         if (DEBUG_OVERFLOW) {
             Paint paint = new Paint();
             paint.setStyle(Style.STROKE);
             paint.setColor(Color.RED);

             // Show bounding box
             canvas.drawRect(getPaddingStart(), 0, getWidth() - getPaddingEnd(), getHeight(), paint);

             // Show etc box
             paint.setColor(Color.GREEN);
             canvas.drawRect(
                     mUnderflowStart, 0, mUnderflowStart + mUnderflowWidth, getHeight(), paint);
         }
     }

     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         mMeasureViews.clear();
         int mode = MeasureSpec.getMode(widthMeasureSpec);
         final int width = MeasureSpec.getSize(widthMeasureSpec);
         final int count = getChildCount();
         // Collect all of the views which want to be laid out
         for (int i = 0; i < count; i++) {
             StatusIconDisplayable icon = (StatusIconDisplayable) getChildAt(i);
             if (icon.isIconVisible() && !icon.isIconBlocked()
                     && !mIgnoredSlots.contains(icon.getSlot())) {
                 mMeasureViews.add((View) icon);
             }
         }

         int visibleCount = mMeasureViews.size();
         int maxVisible = visibleCount <= MAX_ICONS ? MAX_ICONS : MAX_ICONS - 1;
         int totalWidth = mPaddingLeft + mPaddingRight;
         boolean trackWidth = true;

         // Measure all children so that they report the correct width
         int childWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.UNSPECIFIED);
         mNeedsUnderflow = mShouldRestrictIcons && visibleCount > MAX_ICONS;
         for (int i = 0; i < mMeasureViews.size(); i++) {
             // Walking backwards
             View child = mMeasureViews.get(visibleCount - i - 1);
             measureChild(child, childWidthSpec, heightMeasureSpec);
             if (mShouldRestrictIcons) {
                 if (i < maxVisible && trackWidth) {
                     totalWidth += getViewTotalMeasuredWidth(child);
                 } else if (trackWidth) {
                     // We've hit the icon limit; add space for dots
                     totalWidth += mUnderflowWidth;
                     trackWidth = false;
                 }
             } else {
                 totalWidth += getViewTotalMeasuredWidth(child);
             }
         }

         if (mode == MeasureSpec.EXACTLY) {
             if (!mNeedsUnderflow && totalWidth > width) {
                 mNeedsUnderflow = true;
             }
             setMeasuredDimension(width, MeasureSpec.getSize(heightMeasureSpec));
         } else {
             if (mode == MeasureSpec.AT_MOST && totalWidth > width) {
                 mNeedsUnderflow = true;
                 totalWidth = width;
             }
             setMeasuredDimension(totalWidth, MeasureSpec.getSize(heightMeasureSpec));
         }
     }

     @Override
     public void onViewAdded(View child) {
         super.onViewAdded(child);
         StatusIconState vs = new StatusIconState();
         vs.justAdded = true;
         child.setTag(R.id.status_bar_view_state_tag, vs);
     }

     @Override
     public void onViewRemoved(View child) {
         super.onViewRemoved(child);
         child.setTag(R.id.status_bar_view_state_tag, null);
     }

     /**
      * Add a name of an icon slot to be ignored. It will not show up nor be measured
      * @param slotName name of the icon as it exists in
      * frameworks/base/core/res/res/values/config.xml
      */
     public void addIgnoredSlot(String slotName) {
         addIgnoredSlotInternal(slotName);
         requestLayout();
     }

     /**
      * Add a list of slots to be ignored
      * @param slots names of the icons to ignore
      */
     public void addIgnoredSlots(List<String> slots) {
         for (String slot : slots) {
             addIgnoredSlotInternal(slot);
         }

         requestLayout();
     }

     private void addIgnoredSlotInternal(String slotName) {
         if (!mIgnoredSlots.contains(slotName)) {
             mIgnoredSlots.add(slotName);
         }
     }

     /**
      * Remove a slot from the list of ignored icon slots. It will then be shown when set to visible
      * by the {@link StatusBarIconController}.
      * @param slotName name of the icon slot to remove from the ignored list
      */
     public void removeIgnoredSlot(String slotName) {
         if (mIgnoredSlots.contains(slotName)) {
             mIgnoredSlots.remove(slotName);
         }

         requestLayout();
     }

     /**
      * Sets the list of ignored icon slots clearing the current list.
      * @param slots names of the icons to ignore
      */
     public void setIgnoredSlots(List<String> slots) {
         mIgnoredSlots.clear();
         addIgnoredSlots(slots);
     }

     /**
      * Layout is happening from end -> start
      */
     private void calculateIconTranslations() {
         mLayoutStates.clear();
         float width = getWidth();
         float translationX = width - getPaddingEnd();
         float contentStart = getPaddingStart();
         int childCount = getChildCount();
         // Underflow === don't show content until that index
         if (DEBUG) android.util.Log.d(TAG, "calculateIconTranslations: start=" + translationX
                 + " width=" + width + " underflow=" + mNeedsUnderflow);

         // Collect all of the states which want to be visible
         for (int i = childCount - 1; i >= 0; i--) {
             View child = getChildAt(i);
             StatusIconDisplayable iconView = (StatusIconDisplayable) child;
             StatusIconState childState = getViewStateFromChild(child);

             if (!iconView.isIconVisible() || iconView.isIconBlocked()
                     || mIgnoredSlots.contains(iconView.getSlot())) {
                 childState.visibleState = STATE_HIDDEN;
                 if (DEBUG) Log.d(TAG, "skipping child (" + iconView.getSlot() + ") not visible");
                 continue;
             }

             childState.visibleState = STATE_ICON;
             childState.xTranslation = translationX - getViewTotalWidth(child);
             mLayoutStates.add(0, childState);

             translationX -= getViewTotalWidth(child);
         }

         // Show either 1-MAX_ICONS icons, or (MAX_ICONS - 1) icons + overflow
         int totalVisible = mLayoutStates.size();
         int maxVisible = totalVisible <= MAX_ICONS ? MAX_ICONS : MAX_ICONS - 1;

         mUnderflowStart = 0;
         int visible = 0;
         int firstUnderflowIndex = -1;
         for (int i = totalVisible - 1; i >= 0; i--) {
             StatusIconState state = mLayoutStates.get(i);
             // Allow room for underflow if we found we need it in onMeasure
             if (mNeedsUnderflow && (state.xTranslation < (contentStart + mUnderflowWidth))||
                     (mShouldRestrictIcons && visible >= maxVisible)) {
                 firstUnderflowIndex = i;
                 break;
             }
             mUnderflowStart = (int) Math.max(contentStart, state.xTranslation - mUnderflowWidth);
             visible++;
         }

         if (firstUnderflowIndex != -1) {
             int totalDots = 0;
             int dotWidth = mStaticDotDiameter + mDotPadding;
             int dotOffset = mUnderflowStart + mUnderflowWidth - mIconDotFrameWidth;
             for (int i = firstUnderflowIndex; i >= 0; i--) {
                 StatusIconState state = mLayoutStates.get(i);
                 if (totalDots < MAX_DOTS) {
                     state.xTranslation = dotOffset;
                     state.visibleState = STATE_DOT;
                     dotOffset -= dotWidth;
                     totalDots++;
                 } else {
                     state.visibleState = STATE_HIDDEN;
                 }
             }
         }

         // Stole this from NotificationIconContainer. Not optimal but keeps the layout logic clean
         if (isLayoutRtl()) {
             for (int i = 0; i < childCount; i++) {
                 View child = getChildAt(i);
                 StatusIconState state = getViewStateFromChild(child);
                 state.xTranslation = width - state.xTranslation - child.getWidth();
             }
         }
     }

     private void applyIconStates() {
         for (int i = 0; i < getChildCount(); i++) {
             View child = getChildAt(i);
             StatusIconState vs = getViewStateFromChild(child);
             if (vs != null) {
                 vs.applyToView(child);
             }
         }
     }

     private void resetViewStates() {
         for (int i = 0; i < getChildCount(); i++) {
             View child = getChildAt(i);
             StatusIconState vs = getViewStateFromChild(child);
             if (vs == null) {
                 continue;
             }

             vs.initFrom(child);
             vs.alpha = 1.0f;
             vs.hidden = false;
         }
     }

     private static @Nullable StatusIconState getViewStateFromChild(View child) {
         return (StatusIconState) child.getTag(R.id.status_bar_view_state_tag);
     }

     private static int getViewTotalMeasuredWidth(View child) {
         return child.getMeasuredWidth() + child.getPaddingStart() + child.getPaddingEnd();
     }

     private static int getViewTotalWidth(View child) {
         return child.getWidth() + child.getPaddingStart() + child.getPaddingEnd();
     }

     public static class StatusIconState extends ViewState {
         /// StatusBarIconView.STATE_*
         public int visibleState = STATE_ICON;
         public boolean justAdded = true;

         // How far we are from the end of the view actually is the most relevant for animation
         float distanceToViewEnd = -1;

         @Override
         public void applyToView(View view) {
             float parentWidth = 0;
             if (view.getParent() instanceof View) {
                 parentWidth = ((View) view.getParent()).getWidth();
             }

             float currentDistanceToEnd = parentWidth - xTranslation;

             if (!(view instanceof StatusIconDisplayable)) {
                 return;
             }
             StatusIconDisplayable icon = (StatusIconDisplayable) view;
             AnimationProperties animationProperties = null;
             boolean animateVisibility = true;

             // Figure out which properties of the state transition (if any) we need to animate
             if (justAdded
                     || icon.getVisibleState() == STATE_HIDDEN && visibleState == STATE_ICON) {
                 // Icon is appearing, fade it in by putting it where it will be and animating alpha
                 super.applyToView(view);
                 view.setAlpha(0.f);
                 icon.setVisibleState(STATE_HIDDEN);
                 animationProperties = ADD_ICON_PROPERTIES;
             } else if (icon.getVisibleState() != visibleState) {
                 if (icon.getVisibleState() == STATE_ICON && visibleState == STATE_HIDDEN) {
                     // Disappearing, don't do anything fancy
                     animateVisibility = false;
                 } else {
                     // all other transitions (to/from dot, etc)
                     animationProperties = ANIMATE_ALL_PROPERTIES;
                 }
             } else if (visibleState != STATE_HIDDEN && distanceToViewEnd != currentDistanceToEnd) {
                 // Visibility isn't changing, just animate position
                 animationProperties = X_ANIMATION_PROPERTIES;
             }

             icon.setVisibleState(visibleState, animateVisibility);
             if (animationProperties != null) {
                 animateTo(view, animationProperties);
             } else {
                 super.applyToView(view);
             }

             justAdded = false;
             distanceToViewEnd = currentDistanceToEnd;

         }
     }

     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 static final AnimationProperties X_ANIMATION_PROPERTIES = new AnimationProperties() {
         private AnimationFilter mAnimationFilter = new AnimationFilter().animateX();

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

     private static final AnimationProperties ANIMATE_ALL_PROPERTIES = new AnimationProperties() {
         private AnimationFilter mAnimationFilter = new AnimationFilter().animateX().animateY()
                 .animateAlpha().animateScale();

         @Override
         public AnimationFilter getAnimationFilter() {
             return mAnimationFilter;
         }
     }.setDuration(200);
 }
	/*
	* Copyright (C) 2017 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 static com.android.systemui.statusbar.StatusBarIconView.STATE_DOT;
	import static com.android.systemui.statusbar.StatusBarIconView.STATE_HIDDEN;
	import static com.android.systemui.statusbar.StatusBarIconView.STATE_ICON;

	import android.annotation.Nullable;
	import android.content.Context;
	import android.graphics.Canvas;
	import android.graphics.Color;
	import android.graphics.Paint;
	import android.graphics.Paint.Style;
	import android.util.AttributeSet;
	import android.util.Log;
	import android.view.View;

	import com.android.keyguard.AlphaOptimizedLinearLayout;
	import com.android.systemui.R;
	import com.android.systemui.statusbar.StatusIconDisplayable;
	import com.android.systemui.statusbar.notification.stack.AnimationFilter;
	import com.android.systemui.statusbar.notification.stack.AnimationProperties;
	import com.android.systemui.statusbar.notification.stack.ViewState;

	import java.util.ArrayList;
	import java.util.List;

	/**
	* A container for Status bar system icons. Limits the number of system icons and handles overflow
	* similar to {@link NotificationIconContainer}.
	*
	* Children are expected to implement {@link StatusIconDisplayable}
	*/
	public class StatusIconContainer extends AlphaOptimizedLinearLayout {

	private static final String TAG = "StatusIconContainer";
	private static final boolean DEBUG = false;
	private static final boolean DEBUG_OVERFLOW = false;
	// Max 8 status icons including battery
	private static final int MAX_ICONS = 7;
	private static final int MAX_DOTS = 1;

	private int mDotPadding;
	private int mStaticDotDiameter;
	private int mUnderflowWidth;
	private int mUnderflowStart = 0;
	// Whether or not we can draw into the underflow space
	private boolean mNeedsUnderflow;
	// Individual StatusBarIconViews draw their etc dots centered in this width
	private int mIconDotFrameWidth;
	private boolean mShouldRestrictIcons = true;
	// Used to count which states want to be visible during layout
	private ArrayList<StatusIconState> mLayoutStates = new ArrayList<>();
	// So we can count and measure properly
	private ArrayList<View> mMeasureViews = new ArrayList<>();
	// Any ignored icon will never be added as a child
	private ArrayList<String> mIgnoredSlots = new ArrayList<>();

	public StatusIconContainer(Context context) {
	this(context, null);
	}

	public StatusIconContainer(Context context, AttributeSet attrs) {
	super(context, attrs);
	initDimens();
	setWillNotDraw(!DEBUG_OVERFLOW);
	}

	@Override
	protected void onFinishInflate() {
	super.onFinishInflate();
	}

	public void setShouldRestrictIcons(boolean should) {
	mShouldRestrictIcons = should;
	}

	public boolean isRestrictingIcons() {
	return mShouldRestrictIcons;
	}

	private void initDimens() {
	// This is the same value that StatusBarIconView uses
	mIconDotFrameWidth = getResources().getDimensionPixelSize(
	com.android.internal.R.dimen.status_bar_icon_size);
	mDotPadding = getResources().getDimensionPixelSize(R.dimen.overflow_icon_dot_padding);
	int radius = getResources().getDimensionPixelSize(R.dimen.overflow_dot_radius);
	mStaticDotDiameter = 2 * radius;
	mUnderflowWidth = mIconDotFrameWidth + (MAX_DOTS - 1) * (mStaticDotDiameter + mDotPadding);
	}

	@Override
	protected void onLayout(boolean changed, int l, int t, int r, int b) {
	float midY = getHeight() / 2.0f;

	// Layout all child views so that we can move them around later
	for (int i = 0; i < getChildCount(); i++) {
	View child = getChildAt(i);
	int width = child.getMeasuredWidth();
	int height = child.getMeasuredHeight();
	int top = (int) (midY - height / 2.0f);
	child.layout(0, top, width, top + height);
	}

	resetViewStates();
	calculateIconTranslations();
	applyIconStates();
	}

	@Override
	protected void onDraw(Canvas canvas) {
	super.onDraw(canvas);
	if (DEBUG_OVERFLOW) {
	Paint paint = new Paint();
	paint.setStyle(Style.STROKE);
	paint.setColor(Color.RED);

	// Show bounding box
	canvas.drawRect(getPaddingStart(), 0, getWidth() - getPaddingEnd(), getHeight(), paint);

	// Show etc box
	paint.setColor(Color.GREEN);
	canvas.drawRect(
	mUnderflowStart, 0, mUnderflowStart + mUnderflowWidth, getHeight(), paint);
	}
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
	mMeasureViews.clear();
	int mode = MeasureSpec.getMode(widthMeasureSpec);
	final int width = MeasureSpec.getSize(widthMeasureSpec);
	final int count = getChildCount();
	// Collect all of the views which want to be laid out
	for (int i = 0; i < count; i++) {
	StatusIconDisplayable icon = (StatusIconDisplayable) getChildAt(i);
	if (icon.isIconVisible() && !icon.isIconBlocked()
	&& !mIgnoredSlots.contains(icon.getSlot())) {
	mMeasureViews.add((View) icon);
	}
	}

	int visibleCount = mMeasureViews.size();
	int maxVisible = visibleCount <= MAX_ICONS ? MAX_ICONS : MAX_ICONS - 1;
	int totalWidth = mPaddingLeft + mPaddingRight;
	boolean trackWidth = true;

	// Measure all children so that they report the correct width
	int childWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.UNSPECIFIED);
	mNeedsUnderflow = mShouldRestrictIcons && visibleCount > MAX_ICONS;
	for (int i = 0; i < mMeasureViews.size(); i++) {
	// Walking backwards
	View child = mMeasureViews.get(visibleCount - i - 1);
	measureChild(child, childWidthSpec, heightMeasureSpec);
	if (mShouldRestrictIcons) {
	if (i < maxVisible && trackWidth) {
	totalWidth += getViewTotalMeasuredWidth(child);
	} else if (trackWidth) {
	// We've hit the icon limit; add space for dots
	totalWidth += mUnderflowWidth;
	trackWidth = false;
	}
	} else {
	totalWidth += getViewTotalMeasuredWidth(child);
	}
	}

	if (mode == MeasureSpec.EXACTLY) {
	if (!mNeedsUnderflow && totalWidth > width) {
	mNeedsUnderflow = true;
	}
	setMeasuredDimension(width, MeasureSpec.getSize(heightMeasureSpec));
	} else {
	if (mode == MeasureSpec.AT_MOST && totalWidth > width) {
	mNeedsUnderflow = true;
	totalWidth = width;
	}
	setMeasuredDimension(totalWidth, MeasureSpec.getSize(heightMeasureSpec));
	}
	}

	@Override
	public void onViewAdded(View child) {
	super.onViewAdded(child);
	StatusIconState vs = new StatusIconState();
	vs.justAdded = true;
	child.setTag(R.id.status_bar_view_state_tag, vs);
	}

	@Override
	public void onViewRemoved(View child) {
	super.onViewRemoved(child);
	child.setTag(R.id.status_bar_view_state_tag, null);
	}

	/**
	* Add a name of an icon slot to be ignored. It will not show up nor be measured
	* @param slotName name of the icon as it exists in
	* frameworks/base/core/res/res/values/config.xml
	*/
	public void addIgnoredSlot(String slotName) {
	addIgnoredSlotInternal(slotName);
	requestLayout();
	}

	/**
	* Add a list of slots to be ignored
	* @param slots names of the icons to ignore
	*/
	public void addIgnoredSlots(List<String> slots) {
	for (String slot : slots) {
	addIgnoredSlotInternal(slot);
	}

	requestLayout();
	}

	private void addIgnoredSlotInternal(String slotName) {
	if (!mIgnoredSlots.contains(slotName)) {
	mIgnoredSlots.add(slotName);
	}
	}

	/**
	* Remove a slot from the list of ignored icon slots. It will then be shown when set to visible
	* by the {@link StatusBarIconController}.
	* @param slotName name of the icon slot to remove from the ignored list
	*/
	public void removeIgnoredSlot(String slotName) {
	if (mIgnoredSlots.contains(slotName)) {
	mIgnoredSlots.remove(slotName);
	}

	requestLayout();
	}

	/**
	* Sets the list of ignored icon slots clearing the current list.
	* @param slots names of the icons to ignore
	*/
	public void setIgnoredSlots(List<String> slots) {
	mIgnoredSlots.clear();
	addIgnoredSlots(slots);
	}

	/**
	* Layout is happening from end -> start
	*/
	private void calculateIconTranslations() {
	mLayoutStates.clear();
	float width = getWidth();
	float translationX = width - getPaddingEnd();
	float contentStart = getPaddingStart();
	int childCount = getChildCount();
	// Underflow === don't show content until that index
	if (DEBUG) android.util.Log.d(TAG, "calculateIconTranslations: start=" + translationX
	+ " width=" + width + " underflow=" + mNeedsUnderflow);

	// Collect all of the states which want to be visible
	for (int i = childCount - 1; i >= 0; i--) {
	View child = getChildAt(i);
	StatusIconDisplayable iconView = (StatusIconDisplayable) child;
	StatusIconState childState = getViewStateFromChild(child);

	if (!iconView.isIconVisible() \|\| iconView.isIconBlocked()
	\|\| mIgnoredSlots.contains(iconView.getSlot())) {
	childState.visibleState = STATE_HIDDEN;
	if (DEBUG) Log.d(TAG, "skipping child (" + iconView.getSlot() + ") not visible");
	continue;
	}

	childState.visibleState = STATE_ICON;
	childState.xTranslation = translationX - getViewTotalWidth(child);
	mLayoutStates.add(0, childState);

	translationX -= getViewTotalWidth(child);
	}

	// Show either 1-MAX_ICONS icons, or (MAX_ICONS - 1) icons + overflow
	int totalVisible = mLayoutStates.size();
	int maxVisible = totalVisible <= MAX_ICONS ? MAX_ICONS : MAX_ICONS - 1;

	mUnderflowStart = 0;
	int visible = 0;
	int firstUnderflowIndex = -1;
	for (int i = totalVisible - 1; i >= 0; i--) {
	StatusIconState state = mLayoutStates.get(i);
	// Allow room for underflow if we found we need it in onMeasure
	if (mNeedsUnderflow && (state.xTranslation < (contentStart + mUnderflowWidth))\|\|
	(mShouldRestrictIcons && visible >= maxVisible)) {
	firstUnderflowIndex = i;
	break;
	}
	mUnderflowStart = (int) Math.max(contentStart, state.xTranslation - mUnderflowWidth);
	visible++;
	}

	if (firstUnderflowIndex != -1) {
	int totalDots = 0;
	int dotWidth = mStaticDotDiameter + mDotPadding;
	int dotOffset = mUnderflowStart + mUnderflowWidth - mIconDotFrameWidth;
	for (int i = firstUnderflowIndex; i >= 0; i--) {
	StatusIconState state = mLayoutStates.get(i);
	if (totalDots < MAX_DOTS) {
	state.xTranslation = dotOffset;
	state.visibleState = STATE_DOT;
	dotOffset -= dotWidth;
	totalDots++;
	} else {
	state.visibleState = STATE_HIDDEN;
	}
	}
	}

	// Stole this from NotificationIconContainer. Not optimal but keeps the layout logic clean
	if (isLayoutRtl()) {
	for (int i = 0; i < childCount; i++) {
	View child = getChildAt(i);
	StatusIconState state = getViewStateFromChild(child);
	state.xTranslation = width - state.xTranslation - child.getWidth();
	}
	}
	}

	private void applyIconStates() {
	for (int i = 0; i < getChildCount(); i++) {
	View child = getChildAt(i);
	StatusIconState vs = getViewStateFromChild(child);
	if (vs != null) {
	vs.applyToView(child);
	}
	}
	}

	private void resetViewStates() {
	for (int i = 0; i < getChildCount(); i++) {
	View child = getChildAt(i);
	StatusIconState vs = getViewStateFromChild(child);
	if (vs == null) {
	continue;
	}

	vs.initFrom(child);
	vs.alpha = 1.0f;
	vs.hidden = false;
	}
	}

	private static @Nullable StatusIconState getViewStateFromChild(View child) {
	return (StatusIconState) child.getTag(R.id.status_bar_view_state_tag);
	}

	private static int getViewTotalMeasuredWidth(View child) {
	return child.getMeasuredWidth() + child.getPaddingStart() + child.getPaddingEnd();
	}

	private static int getViewTotalWidth(View child) {
	return child.getWidth() + child.getPaddingStart() + child.getPaddingEnd();
	}

	public static class StatusIconState extends ViewState {
	/// StatusBarIconView.STATE_*
	public int visibleState = STATE_ICON;
	public boolean justAdded = true;

	// How far we are from the end of the view actually is the most relevant for animation
	float distanceToViewEnd = -1;

	@Override
	public void applyToView(View view) {
	float parentWidth = 0;
	if (view.getParent() instanceof View) {
	parentWidth = ((View) view.getParent()).getWidth();
	}

	float currentDistanceToEnd = parentWidth - xTranslation;

	if (!(view instanceof StatusIconDisplayable)) {
	return;
	}
	StatusIconDisplayable icon = (StatusIconDisplayable) view;
	AnimationProperties animationProperties = null;
	boolean animateVisibility = true;

	// Figure out which properties of the state transition (if any) we need to animate
	if (justAdded
	\|\| icon.getVisibleState() == STATE_HIDDEN && visibleState == STATE_ICON) {
	// Icon is appearing, fade it in by putting it where it will be and animating alpha
	super.applyToView(view);
	view.setAlpha(0.f);
	icon.setVisibleState(STATE_HIDDEN);
	animationProperties = ADD_ICON_PROPERTIES;
	} else if (icon.getVisibleState() != visibleState) {
	if (icon.getVisibleState() == STATE_ICON && visibleState == STATE_HIDDEN) {
	// Disappearing, don't do anything fancy
	animateVisibility = false;
	} else {
	// all other transitions (to/from dot, etc)
	animationProperties = ANIMATE_ALL_PROPERTIES;
	}
	} else if (visibleState != STATE_HIDDEN && distanceToViewEnd != currentDistanceToEnd) {
	// Visibility isn't changing, just animate position
	animationProperties = X_ANIMATION_PROPERTIES;
	}

	icon.setVisibleState(visibleState, animateVisibility);
	if (animationProperties != null) {
	animateTo(view, animationProperties);
	} else {
	super.applyToView(view);
	}

	justAdded = false;
	distanceToViewEnd = currentDistanceToEnd;

	}
	}

	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 static final AnimationProperties X_ANIMATION_PROPERTIES = new AnimationProperties() {
	private AnimationFilter mAnimationFilter = new AnimationFilter().animateX();

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

	private static final AnimationProperties ANIMATE_ALL_PROPERTIES = new AnimationProperties() {
	private AnimationFilter mAnimationFilter = new AnimationFilter().animateX().animateY()
	.animateAlpha().animateScale();

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