v17/leanback/src/android/support/v17/leanback/app/HeadersSupportFragment.java - platform/frameworks/support - Git at Google

 /* This file is auto-generated from HeadersFragment.java.  DO NOT MODIFY. */

 /*
  * Copyright (C) 2014 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 android.support.v17.leanback.app;

 import android.content.Context;
 import android.graphics.Color;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.GradientDrawable;
 import android.os.Bundle;
 import android.support.v17.leanback.R;
 import android.support.v17.leanback.widget.ClassPresenterSelector;
 import android.support.v17.leanback.widget.DividerPresenter;
 import android.support.v17.leanback.widget.DividerRow;
 import android.support.v17.leanback.widget.FocusHighlightHelper;
 import android.support.v17.leanback.widget.HorizontalGridView;
 import android.support.v17.leanback.widget.ItemBridgeAdapter;
 import android.support.v17.leanback.widget.PresenterSelector;
 import android.support.v17.leanback.widget.Row;
 import android.support.v17.leanback.widget.RowHeaderPresenter;
 import android.support.v17.leanback.widget.SectionRow;
 import android.support.v17.leanback.widget.VerticalGridView;
 import android.support.v7.widget.RecyclerView;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.View.OnLayoutChangeListener;
 import android.widget.FrameLayout;

 /**
  * An internal fragment containing a list of row headers.
  */
 public class HeadersSupportFragment extends BaseRowSupportFragment {

     /**
      * Interface definition for a callback to be invoked when a header item is clicked.
      */
     public interface OnHeaderClickedListener {
         /**
          * Called when a header item has been clicked.
          *
          * @param viewHolder Row ViewHolder object corresponding to the selected Header.
          * @param row Row object corresponding to the selected Header.
          */
         void onHeaderClicked(RowHeaderPresenter.ViewHolder viewHolder, Row row);
     }

     /**
      * Interface definition for a callback to be invoked when a header item is selected.
      */
     public interface OnHeaderViewSelectedListener {
         /**
          * Called when a header item has been selected.
          *
          * @param viewHolder Row ViewHolder object corresponding to the selected Header.
          * @param row Row object corresponding to the selected Header.
          */
         void onHeaderSelected(RowHeaderPresenter.ViewHolder viewHolder, Row row);
     }

     private OnHeaderViewSelectedListener mOnHeaderViewSelectedListener;
     private OnHeaderClickedListener mOnHeaderClickedListener;
     private boolean mHeadersEnabled = true;
     private boolean mHeadersGone = false;
     private int mBackgroundColor;
     private boolean mBackgroundColorSet;

     private static final PresenterSelector sHeaderPresenter = new ClassPresenterSelector()
             .addClassPresenter(DividerRow.class, new DividerPresenter())
             .addClassPresenter(SectionRow.class,
                     new RowHeaderPresenter(R.layout.lb_section_header, false))
             .addClassPresenter(Row.class, new RowHeaderPresenter(R.layout.lb_header));

     public HeadersSupportFragment() {
         setPresenterSelector(sHeaderPresenter);
     }

     public void setOnHeaderClickedListener(OnHeaderClickedListener listener) {
         mOnHeaderClickedListener = listener;
     }

     public void setOnHeaderViewSelectedListener(OnHeaderViewSelectedListener listener) {
         mOnHeaderViewSelectedListener = listener;
     }

     @Override
     VerticalGridView findGridViewFromRoot(View view) {
         return (VerticalGridView) view.findViewById(R.id.browse_headers);
     }

     @Override
     void onRowSelected(RecyclerView parent, RecyclerView.ViewHolder viewHolder,
             int position, int subposition) {
         if (mOnHeaderViewSelectedListener != null) {
             if (viewHolder != null && position >= 0) {
                 ItemBridgeAdapter.ViewHolder vh = (ItemBridgeAdapter.ViewHolder) viewHolder;
                 mOnHeaderViewSelectedListener.onHeaderSelected(
                         (RowHeaderPresenter.ViewHolder) vh.getViewHolder(), (Row) vh.getItem());
             } else {
                 mOnHeaderViewSelectedListener.onHeaderSelected(null, null);
             }
         }
     }

     private final ItemBridgeAdapter.AdapterListener mAdapterListener =
             new ItemBridgeAdapter.AdapterListener() {
         @Override
         public void onCreate(final ItemBridgeAdapter.ViewHolder viewHolder) {
             View headerView = viewHolder.getViewHolder().view;
             headerView.setOnClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
                     if (mOnHeaderClickedListener != null) {
                         mOnHeaderClickedListener.onHeaderClicked(
                                 (RowHeaderPresenter.ViewHolder) viewHolder.getViewHolder(),
                                 (Row) viewHolder.getItem());
                     }
                 }
             });
             if (mWrapper != null) {
                 viewHolder.itemView.addOnLayoutChangeListener(sLayoutChangeListener);
             } else {
                 headerView.addOnLayoutChangeListener(sLayoutChangeListener);
             }
         }

     };

     private static OnLayoutChangeListener sLayoutChangeListener = new OnLayoutChangeListener() {
         @Override
         public void onLayoutChange(View v, int left, int top, int right, int bottom,
             int oldLeft, int oldTop, int oldRight, int oldBottom) {
             v.setPivotX(v.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL ? v.getWidth() : 0);
             v.setPivotY(v.getMeasuredHeight() / 2);
         }
     };

     @Override
     int getLayoutResourceId() {
         return R.layout.lb_headers_fragment;
     }

     @Override
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
         final VerticalGridView listView = getVerticalGridView();
         if (listView == null) {
             return;
         }
         if (getBridgeAdapter() != null) {
             FocusHighlightHelper.setupHeaderItemFocusHighlight(listView);
         }
         if (mBackgroundColorSet) {
             listView.setBackgroundColor(mBackgroundColor);
             updateFadingEdgeToBrandColor(mBackgroundColor);
         } else {
             Drawable d = listView.getBackground();
             if (d instanceof ColorDrawable) {
                 updateFadingEdgeToBrandColor(((ColorDrawable) d).getColor());
             }
         }
         updateListViewVisibility();
     }

     private void updateListViewVisibility() {
         final VerticalGridView listView = getVerticalGridView();
         if (listView != null) {
             getView().setVisibility(mHeadersGone ? View.GONE : View.VISIBLE);
             if (!mHeadersGone) {
                 if (mHeadersEnabled) {
                     listView.setChildrenVisibility(View.VISIBLE);
                 } else {
                     listView.setChildrenVisibility(View.INVISIBLE);
                 }
             }
         }
     }

     void setHeadersEnabled(boolean enabled) {
         mHeadersEnabled = enabled;
         updateListViewVisibility();
     }

     void setHeadersGone(boolean gone) {
         mHeadersGone = gone;
         updateListViewVisibility();
     }

     static class NoOverlappingFrameLayout extends FrameLayout {

         public NoOverlappingFrameLayout(Context context) {
             super(context);
         }

         /**
          * Avoid creating hardware layer for header dock.
          */
         @Override
         public boolean hasOverlappingRendering() {
             return false;
         }
     }

     // Wrapper needed because of conflict between RecyclerView's use of alpha
     // for ADD animations, and RowHeaderPresenter's use of alpha for selected level.
     private final ItemBridgeAdapter.Wrapper mWrapper = new ItemBridgeAdapter.Wrapper() {
         @Override
         public void wrap(View wrapper, View wrapped) {
             ((FrameLayout) wrapper).addView(wrapped);
         }

         @Override
         public View createWrapper(View root) {
             return new NoOverlappingFrameLayout(root.getContext());
         }
     };
     @Override
     void updateAdapter() {
         super.updateAdapter();
         ItemBridgeAdapter adapter = getBridgeAdapter();
         if (adapter != null) {
             adapter.setAdapterListener(mAdapterListener);
             adapter.setWrapper(mWrapper);
         }
         if (adapter != null && getVerticalGridView() != null) {
             FocusHighlightHelper.setupHeaderItemFocusHighlight(getVerticalGridView());
         }
     }

     void setBackgroundColor(int color) {
         mBackgroundColor = color;
         mBackgroundColorSet = true;

         if (getVerticalGridView() != null) {
             getVerticalGridView().setBackgroundColor(mBackgroundColor);
             updateFadingEdgeToBrandColor(mBackgroundColor);
         }
     }

     private void updateFadingEdgeToBrandColor(int backgroundColor) {
         View fadingView = getView().findViewById(R.id.fade_out_edge);
         Drawable background = fadingView.getBackground();
         if (background instanceof GradientDrawable) {
             background.mutate();
             ((GradientDrawable) background).setColors(
                     new int[] {Color.TRANSPARENT, backgroundColor});
         }
     }

     @Override
     public void onTransitionStart() {
         super.onTransitionStart();
         if (!mHeadersEnabled) {
             // When enabling headers fragment,  the RowHeaderView gets a focus but
             // isShown() is still false because its parent is INVISIBLE, accessibility
             // event is not sent.
             // Workaround is: prevent focus to a child view during transition and put
             // focus on it after transition is done.
             final VerticalGridView listView = getVerticalGridView();
             if (listView != null) {
                 listView.setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS);
                 if (listView.hasFocus()) {
                     listView.requestFocus();
                 }
             }
         }
     }

     @Override
     public void onTransitionEnd() {
         if (mHeadersEnabled) {
             final VerticalGridView listView = getVerticalGridView();
             if (listView != null) {
                 listView.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
                 if (listView.hasFocus()) {
                     listView.requestFocus();
                 }
             }
         }
         super.onTransitionEnd();
     }

     public boolean isScrolling() {
         return getVerticalGridView().getScrollState()
                 != HorizontalGridView.SCROLL_STATE_IDLE;
     }
 }
	/* This file is auto-generated from HeadersFragment.java. DO NOT MODIFY. */

	/*
	* Copyright (C) 2014 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 android.support.v17.leanback.app;

	import android.content.Context;
	import android.graphics.Color;
	import android.graphics.drawable.ColorDrawable;
	import android.graphics.drawable.Drawable;
	import android.graphics.drawable.GradientDrawable;
	import android.os.Bundle;
	import android.support.v17.leanback.R;
	import android.support.v17.leanback.widget.ClassPresenterSelector;
	import android.support.v17.leanback.widget.DividerPresenter;
	import android.support.v17.leanback.widget.DividerRow;
	import android.support.v17.leanback.widget.FocusHighlightHelper;
	import android.support.v17.leanback.widget.HorizontalGridView;
	import android.support.v17.leanback.widget.ItemBridgeAdapter;
	import android.support.v17.leanback.widget.PresenterSelector;
	import android.support.v17.leanback.widget.Row;
	import android.support.v17.leanback.widget.RowHeaderPresenter;
	import android.support.v17.leanback.widget.SectionRow;
	import android.support.v17.leanback.widget.VerticalGridView;
	import android.support.v7.widget.RecyclerView;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.View.OnLayoutChangeListener;
	import android.widget.FrameLayout;

	/**
	* An internal fragment containing a list of row headers.
	*/
	public class HeadersSupportFragment extends BaseRowSupportFragment {

	/**
	* Interface definition for a callback to be invoked when a header item is clicked.
	*/
	public interface OnHeaderClickedListener {
	/**
	* Called when a header item has been clicked.
	*
	* @param viewHolder Row ViewHolder object corresponding to the selected Header.
	* @param row Row object corresponding to the selected Header.
	*/
	void onHeaderClicked(RowHeaderPresenter.ViewHolder viewHolder, Row row);
	}

	/**
	* Interface definition for a callback to be invoked when a header item is selected.
	*/
	public interface OnHeaderViewSelectedListener {
	/**
	* Called when a header item has been selected.
	*
	* @param viewHolder Row ViewHolder object corresponding to the selected Header.
	* @param row Row object corresponding to the selected Header.
	*/
	void onHeaderSelected(RowHeaderPresenter.ViewHolder viewHolder, Row row);
	}

	private OnHeaderViewSelectedListener mOnHeaderViewSelectedListener;
	private OnHeaderClickedListener mOnHeaderClickedListener;
	private boolean mHeadersEnabled = true;
	private boolean mHeadersGone = false;
	private int mBackgroundColor;
	private boolean mBackgroundColorSet;

	private static final PresenterSelector sHeaderPresenter = new ClassPresenterSelector()
	.addClassPresenter(DividerRow.class, new DividerPresenter())
	.addClassPresenter(SectionRow.class,
	new RowHeaderPresenter(R.layout.lb_section_header, false))
	.addClassPresenter(Row.class, new RowHeaderPresenter(R.layout.lb_header));

	public HeadersSupportFragment() {
	setPresenterSelector(sHeaderPresenter);
	}

	public void setOnHeaderClickedListener(OnHeaderClickedListener listener) {
	mOnHeaderClickedListener = listener;
	}

	public void setOnHeaderViewSelectedListener(OnHeaderViewSelectedListener listener) {
	mOnHeaderViewSelectedListener = listener;
	}

	@Override
	VerticalGridView findGridViewFromRoot(View view) {
	return (VerticalGridView) view.findViewById(R.id.browse_headers);
	}

	@Override
	void onRowSelected(RecyclerView parent, RecyclerView.ViewHolder viewHolder,
	int position, int subposition) {
	if (mOnHeaderViewSelectedListener != null) {
	if (viewHolder != null && position >= 0) {
	ItemBridgeAdapter.ViewHolder vh = (ItemBridgeAdapter.ViewHolder) viewHolder;
	mOnHeaderViewSelectedListener.onHeaderSelected(
	(RowHeaderPresenter.ViewHolder) vh.getViewHolder(), (Row) vh.getItem());
	} else {
	mOnHeaderViewSelectedListener.onHeaderSelected(null, null);
	}
	}
	}

	private final ItemBridgeAdapter.AdapterListener mAdapterListener =
	new ItemBridgeAdapter.AdapterListener() {
	@Override
	public void onCreate(final ItemBridgeAdapter.ViewHolder viewHolder) {
	View headerView = viewHolder.getViewHolder().view;
	headerView.setOnClickListener(new View.OnClickListener() {
	@Override
	public void onClick(View v) {
	if (mOnHeaderClickedListener != null) {
	mOnHeaderClickedListener.onHeaderClicked(
	(RowHeaderPresenter.ViewHolder) viewHolder.getViewHolder(),
	(Row) viewHolder.getItem());
	}
	}
	});
	if (mWrapper != null) {
	viewHolder.itemView.addOnLayoutChangeListener(sLayoutChangeListener);
	} else {
	headerView.addOnLayoutChangeListener(sLayoutChangeListener);
	}
	}

	};

	private static OnLayoutChangeListener sLayoutChangeListener = new OnLayoutChangeListener() {
	@Override
	public void onLayoutChange(View v, int left, int top, int right, int bottom,
	int oldLeft, int oldTop, int oldRight, int oldBottom) {
	v.setPivotX(v.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL ? v.getWidth() : 0);
	v.setPivotY(v.getMeasuredHeight() / 2);
	}
	};

	@Override
	int getLayoutResourceId() {
	return R.layout.lb_headers_fragment;
	}

	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
	super.onViewCreated(view, savedInstanceState);
	final VerticalGridView listView = getVerticalGridView();
	if (listView == null) {
	return;
	}
	if (getBridgeAdapter() != null) {
	FocusHighlightHelper.setupHeaderItemFocusHighlight(listView);
	}
	if (mBackgroundColorSet) {
	listView.setBackgroundColor(mBackgroundColor);
	updateFadingEdgeToBrandColor(mBackgroundColor);
	} else {
	Drawable d = listView.getBackground();
	if (d instanceof ColorDrawable) {
	updateFadingEdgeToBrandColor(((ColorDrawable) d).getColor());
	}
	}
	updateListViewVisibility();
	}

	private void updateListViewVisibility() {
	final VerticalGridView listView = getVerticalGridView();
	if (listView != null) {
	getView().setVisibility(mHeadersGone ? View.GONE : View.VISIBLE);
	if (!mHeadersGone) {
	if (mHeadersEnabled) {
	listView.setChildrenVisibility(View.VISIBLE);
	} else {
	listView.setChildrenVisibility(View.INVISIBLE);
	}
	}
	}
	}

	void setHeadersEnabled(boolean enabled) {
	mHeadersEnabled = enabled;
	updateListViewVisibility();
	}

	void setHeadersGone(boolean gone) {
	mHeadersGone = gone;
	updateListViewVisibility();
	}

	static class NoOverlappingFrameLayout extends FrameLayout {

	public NoOverlappingFrameLayout(Context context) {
	super(context);
	}

	/**
	* Avoid creating hardware layer for header dock.
	*/
	@Override
	public boolean hasOverlappingRendering() {
	return false;
	}
	}

	// Wrapper needed because of conflict between RecyclerView's use of alpha
	// for ADD animations, and RowHeaderPresenter's use of alpha for selected level.
	private final ItemBridgeAdapter.Wrapper mWrapper = new ItemBridgeAdapter.Wrapper() {
	@Override
	public void wrap(View wrapper, View wrapped) {
	((FrameLayout) wrapper).addView(wrapped);
	}

	@Override
	public View createWrapper(View root) {
	return new NoOverlappingFrameLayout(root.getContext());
	}
	};
	@Override
	void updateAdapter() {
	super.updateAdapter();
	ItemBridgeAdapter adapter = getBridgeAdapter();
	if (adapter != null) {
	adapter.setAdapterListener(mAdapterListener);
	adapter.setWrapper(mWrapper);
	}
	if (adapter != null && getVerticalGridView() != null) {
	FocusHighlightHelper.setupHeaderItemFocusHighlight(getVerticalGridView());
	}
	}

	void setBackgroundColor(int color) {
	mBackgroundColor = color;
	mBackgroundColorSet = true;

	if (getVerticalGridView() != null) {
	getVerticalGridView().setBackgroundColor(mBackgroundColor);
	updateFadingEdgeToBrandColor(mBackgroundColor);
	}
	}

	private void updateFadingEdgeToBrandColor(int backgroundColor) {
	View fadingView = getView().findViewById(R.id.fade_out_edge);
	Drawable background = fadingView.getBackground();
	if (background instanceof GradientDrawable) {
	background.mutate();
	((GradientDrawable) background).setColors(
	new int[] {Color.TRANSPARENT, backgroundColor});
	}
	}

	@Override
	public void onTransitionStart() {
	super.onTransitionStart();
	if (!mHeadersEnabled) {
	// When enabling headers fragment, the RowHeaderView gets a focus but
	// isShown() is still false because its parent is INVISIBLE, accessibility
	// event is not sent.
	// Workaround is: prevent focus to a child view during transition and put
	// focus on it after transition is done.
	final VerticalGridView listView = getVerticalGridView();
	if (listView != null) {
	listView.setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS);
	if (listView.hasFocus()) {
	listView.requestFocus();
	}
	}
	}
	}

	@Override
	public void onTransitionEnd() {
	if (mHeadersEnabled) {
	final VerticalGridView listView = getVerticalGridView();
	if (listView != null) {
	listView.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
	if (listView.hasFocus()) {
	listView.requestFocus();
	}
	}
	}
	super.onTransitionEnd();
	}

	public boolean isScrolling() {
	return getVerticalGridView().getScrollState()
	!= HorizontalGridView.SCROLL_STATE_IDLE;
	}
	}