src/com/android/launcher3/LauncherAppWidgetHostView.java - platform/packages/apps/Launcher3 - Git at Google

 /*
  * Copyright (C) 2009 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.launcher3;

 import android.appwidget.AppWidgetHostView;
 import android.appwidget.AppWidgetProviderInfo;
 import android.content.Context;
 import android.graphics.Rect;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewConfiguration;
 import android.view.ViewDebug;
 import android.view.ViewGroup;
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.widget.RemoteViews;

 import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.dragndrop.DragLayer.TouchCompleteListener;

 import java.util.ArrayList;

 /**
  * {@inheritDoc}
  */
 public class LauncherAppWidgetHostView extends AppWidgetHostView implements TouchCompleteListener {

     LayoutInflater mInflater;

     private CheckLongPressHelper mLongPressHelper;
     private StylusEventHelper mStylusEventHelper;
     private Context mContext;
     @ViewDebug.ExportedProperty(category = "launcher")
     private int mPreviousOrientation;
     private DragLayer mDragLayer;

     private float mSlop;

     @ViewDebug.ExportedProperty(category = "launcher")
     private boolean mChildrenFocused;

     public LauncherAppWidgetHostView(Context context) {
         super(context);
         mContext = context;
         mLongPressHelper = new CheckLongPressHelper(this);
         mStylusEventHelper = new StylusEventHelper(new SimpleOnStylusPressListener(this), this);
         mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         mDragLayer = ((Launcher) context).getDragLayer();
         setAccessibilityDelegate(LauncherAppState.getInstance().getAccessibilityDelegate());

         setBackgroundResource(R.drawable.widget_internal_focus_bg);
     }

     @Override
     protected View getErrorView() {
         return mInflater.inflate(R.layout.appwidget_error, this, false);
     }

     public void updateLastInflationOrientation() {
         mPreviousOrientation = mContext.getResources().getConfiguration().orientation;
     }

     @Override
     public void updateAppWidget(RemoteViews remoteViews) {
         // Store the orientation in which the widget was inflated
         updateLastInflationOrientation();
         super.updateAppWidget(remoteViews);
     }

     public boolean isReinflateRequired() {
         // Re-inflate is required if the orientation has changed since last inflated.
         int orientation = mContext.getResources().getConfiguration().orientation;
         if (mPreviousOrientation != orientation) {
            return true;
        }
        return false;
     }

     public boolean onInterceptTouchEvent(MotionEvent ev) {
         // Just in case the previous long press hasn't been cleared, we make sure to start fresh
         // on touch down.
         if (ev.getAction() == MotionEvent.ACTION_DOWN) {
             mLongPressHelper.cancelLongPress();
         }

         // Consume any touch events for ourselves after longpress is triggered
         if (mLongPressHelper.hasPerformedLongPress()) {
             mLongPressHelper.cancelLongPress();
             return true;
         }

         // Watch for longpress or stylus button press events at this level to
         // make sure users can always pick up this widget
         if (mStylusEventHelper.onMotionEvent(ev)) {
             mLongPressHelper.cancelLongPress();
             return true;
         }
         switch (ev.getAction()) {
             case MotionEvent.ACTION_DOWN: {
                 if (!mStylusEventHelper.inStylusButtonPressed()) {
                     mLongPressHelper.postCheckForLongPress();
                 }
                 mDragLayer.setTouchCompleteListener(this);
                 break;
             }

             case MotionEvent.ACTION_UP:
             case MotionEvent.ACTION_CANCEL:
                 mLongPressHelper.cancelLongPress();
                 break;
             case MotionEvent.ACTION_MOVE:
                 if (!Utilities.pointInView(this, ev.getX(), ev.getY(), mSlop)) {
                     mLongPressHelper.cancelLongPress();
                 }
                 break;
         }

         // Otherwise continue letting touch events fall through to children
         return false;
     }

     public boolean onTouchEvent(MotionEvent ev) {
         // If the widget does not handle touch, then cancel
         // long press when we release the touch
         switch (ev.getAction()) {
             case MotionEvent.ACTION_UP:
             case MotionEvent.ACTION_CANCEL:
                 mLongPressHelper.cancelLongPress();
                 break;
             case MotionEvent.ACTION_MOVE:
                 if (!Utilities.pointInView(this, ev.getX(), ev.getY(), mSlop)) {
                     mLongPressHelper.cancelLongPress();
                 }
                 break;
         }
         return false;
     }

     @Override
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
         mSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
     }

     @Override
     public void cancelLongPress() {
         super.cancelLongPress();
         mLongPressHelper.cancelLongPress();
     }

     @Override
     public AppWidgetProviderInfo getAppWidgetInfo() {
         AppWidgetProviderInfo info = super.getAppWidgetInfo();
         if (info != null && !(info instanceof LauncherAppWidgetProviderInfo)) {
             throw new IllegalStateException("Launcher widget must have"
                     + " LauncherAppWidgetProviderInfo");
         }
         return info;
     }

     public LauncherAppWidgetProviderInfo getLauncherAppWidgetProviderInfo() {
         return (LauncherAppWidgetProviderInfo) getAppWidgetInfo();
     }

     @Override
     public void onTouchComplete() {
         if (!mLongPressHelper.hasPerformedLongPress()) {
             // If a long press has been performed, we don't want to clear the record of that since
             // we still may be receiving a touch up which we want to intercept
             mLongPressHelper.cancelLongPress();
         }
     }

     @Override
     public int getDescendantFocusability() {
         return mChildrenFocused ? ViewGroup.FOCUS_BEFORE_DESCENDANTS
                 : ViewGroup.FOCUS_BLOCK_DESCENDANTS;
     }

     @Override
     public boolean dispatchKeyEvent(KeyEvent event) {
         if (mChildrenFocused && event.getKeyCode() == KeyEvent.KEYCODE_ESCAPE
                 && event.getAction() == KeyEvent.ACTION_UP) {
             mChildrenFocused = false;
             requestFocus();
             return true;
         }
         return super.dispatchKeyEvent(event);
     }

     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         if (!mChildrenFocused && keyCode == KeyEvent.KEYCODE_ENTER) {
             event.startTracking();
             return true;
         }
         return super.onKeyDown(keyCode, event);
     }

     @Override
     public boolean onKeyUp(int keyCode, KeyEvent event) {
         if (event.isTracking()) {
             if (!mChildrenFocused && keyCode == KeyEvent.KEYCODE_ENTER) {
                 mChildrenFocused = true;
                 ArrayList<View> focusableChildren = getFocusables(FOCUS_FORWARD);
                 focusableChildren.remove(this);
                 int childrenCount = focusableChildren.size();
                 switch (childrenCount) {
                     case 0:
                         mChildrenFocused = false;
                         break;
                     case 1: {
                         if (getTag() instanceof ItemInfo) {
                             ItemInfo item = (ItemInfo) getTag();
                             if (item.spanX == 1 && item.spanY == 1) {
                                 focusableChildren.get(0).performClick();
                                 mChildrenFocused = false;
                                 return true;
                             }
                         }
                         // continue;
                     }
                     default:
                         focusableChildren.get(0).requestFocus();
                         return true;
                 }
             }
         }
         return super.onKeyUp(keyCode, event);
     }

     @Override
     protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
         if (gainFocus) {
             mChildrenFocused = false;
             dispatchChildFocus(false);
         }
         super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
     }

     @Override
     public void requestChildFocus(View child, View focused) {
         super.requestChildFocus(child, focused);
         dispatchChildFocus(focused != null);
         if (focused != null) {
             focused.setFocusableInTouchMode(false);
         }
     }

     @Override
     public void clearChildFocus(View child) {
         super.clearChildFocus(child);
         dispatchChildFocus(false);
     }

     @Override
     public boolean dispatchUnhandledMove(View focused, int direction) {
         return mChildrenFocused;
     }

     private void dispatchChildFocus(boolean childIsFocused) {
         // The host view's background changes when selected, to indicate the focus is inside.
         setSelected(childIsFocused);
     }

     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         try {
             super.onLayout(changed, left, top, right, bottom);
         } catch (final RuntimeException e) {
             post(new Runnable() {
                 @Override
                 public void run() {
                     // Update the widget with 0 Layout id, to reset the view to error view.
                     updateAppWidget(new RemoteViews(getAppWidgetInfo().provider.getPackageName(), 0));
                 }
             });
         }
     }

     @Override
     public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
         super.onInitializeAccessibilityNodeInfo(info);
         info.setClassName(getClass().getName());
     }
 }
	/*
	* Copyright (C) 2009 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.launcher3;

	import android.appwidget.AppWidgetHostView;
	import android.appwidget.AppWidgetProviderInfo;
	import android.content.Context;
	import android.graphics.Rect;
	import android.view.KeyEvent;
	import android.view.LayoutInflater;
	import android.view.MotionEvent;
	import android.view.View;
	import android.view.ViewConfiguration;
	import android.view.ViewDebug;
	import android.view.ViewGroup;
	import android.view.accessibility.AccessibilityNodeInfo;
	import android.widget.RemoteViews;

	import com.android.launcher3.dragndrop.DragLayer;
	import com.android.launcher3.dragndrop.DragLayer.TouchCompleteListener;

	import java.util.ArrayList;

	/**
	* {@inheritDoc}
	*/
	public class LauncherAppWidgetHostView extends AppWidgetHostView implements TouchCompleteListener {

	LayoutInflater mInflater;

	private CheckLongPressHelper mLongPressHelper;
	private StylusEventHelper mStylusEventHelper;
	private Context mContext;
	@ViewDebug.ExportedProperty(category = "launcher")
	private int mPreviousOrientation;
	private DragLayer mDragLayer;

	private float mSlop;

	@ViewDebug.ExportedProperty(category = "launcher")
	private boolean mChildrenFocused;

	public LauncherAppWidgetHostView(Context context) {
	super(context);
	mContext = context;
	mLongPressHelper = new CheckLongPressHelper(this);
	mStylusEventHelper = new StylusEventHelper(new SimpleOnStylusPressListener(this), this);
	mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
	mDragLayer = ((Launcher) context).getDragLayer();
	setAccessibilityDelegate(LauncherAppState.getInstance().getAccessibilityDelegate());

	setBackgroundResource(R.drawable.widget_internal_focus_bg);
	}

	@Override
	protected View getErrorView() {
	return mInflater.inflate(R.layout.appwidget_error, this, false);
	}

	public void updateLastInflationOrientation() {
	mPreviousOrientation = mContext.getResources().getConfiguration().orientation;
	}

	@Override
	public void updateAppWidget(RemoteViews remoteViews) {
	// Store the orientation in which the widget was inflated
	updateLastInflationOrientation();
	super.updateAppWidget(remoteViews);
	}

	public boolean isReinflateRequired() {
	// Re-inflate is required if the orientation has changed since last inflated.
	int orientation = mContext.getResources().getConfiguration().orientation;
	if (mPreviousOrientation != orientation) {
	return true;
	}
	return false;
	}

	public boolean onInterceptTouchEvent(MotionEvent ev) {
	// Just in case the previous long press hasn't been cleared, we make sure to start fresh
	// on touch down.
	if (ev.getAction() == MotionEvent.ACTION_DOWN) {
	mLongPressHelper.cancelLongPress();
	}

	// Consume any touch events for ourselves after longpress is triggered
	if (mLongPressHelper.hasPerformedLongPress()) {
	mLongPressHelper.cancelLongPress();
	return true;
	}

	// Watch for longpress or stylus button press events at this level to
	// make sure users can always pick up this widget
	if (mStylusEventHelper.onMotionEvent(ev)) {
	mLongPressHelper.cancelLongPress();
	return true;
	}
	switch (ev.getAction()) {
	case MotionEvent.ACTION_DOWN: {
	if (!mStylusEventHelper.inStylusButtonPressed()) {
	mLongPressHelper.postCheckForLongPress();
	}
	mDragLayer.setTouchCompleteListener(this);
	break;
	}

	case MotionEvent.ACTION_UP:
	case MotionEvent.ACTION_CANCEL:
	mLongPressHelper.cancelLongPress();
	break;
	case MotionEvent.ACTION_MOVE:
	if (!Utilities.pointInView(this, ev.getX(), ev.getY(), mSlop)) {
	mLongPressHelper.cancelLongPress();
	}
	break;
	}

	// Otherwise continue letting touch events fall through to children
	return false;
	}

	public boolean onTouchEvent(MotionEvent ev) {
	// If the widget does not handle touch, then cancel
	// long press when we release the touch
	switch (ev.getAction()) {
	case MotionEvent.ACTION_UP:
	case MotionEvent.ACTION_CANCEL:
	mLongPressHelper.cancelLongPress();
	break;
	case MotionEvent.ACTION_MOVE:
	if (!Utilities.pointInView(this, ev.getX(), ev.getY(), mSlop)) {
	mLongPressHelper.cancelLongPress();
	}
	break;
	}
	return false;
	}

	@Override
	protected void onAttachedToWindow() {
	super.onAttachedToWindow();
	mSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
	}

	@Override
	public void cancelLongPress() {
	super.cancelLongPress();
	mLongPressHelper.cancelLongPress();
	}

	@Override
	public AppWidgetProviderInfo getAppWidgetInfo() {
	AppWidgetProviderInfo info = super.getAppWidgetInfo();
	if (info != null && !(info instanceof LauncherAppWidgetProviderInfo)) {
	throw new IllegalStateException("Launcher widget must have"
	+ " LauncherAppWidgetProviderInfo");
	}
	return info;
	}

	public LauncherAppWidgetProviderInfo getLauncherAppWidgetProviderInfo() {
	return (LauncherAppWidgetProviderInfo) getAppWidgetInfo();
	}

	@Override
	public void onTouchComplete() {
	if (!mLongPressHelper.hasPerformedLongPress()) {
	// If a long press has been performed, we don't want to clear the record of that since
	// we still may be receiving a touch up which we want to intercept
	mLongPressHelper.cancelLongPress();
	}
	}

	@Override
	public int getDescendantFocusability() {
	return mChildrenFocused ? ViewGroup.FOCUS_BEFORE_DESCENDANTS
	: ViewGroup.FOCUS_BLOCK_DESCENDANTS;
	}

	@Override
	public boolean dispatchKeyEvent(KeyEvent event) {
	if (mChildrenFocused && event.getKeyCode() == KeyEvent.KEYCODE_ESCAPE
	&& event.getAction() == KeyEvent.ACTION_UP) {
	mChildrenFocused = false;
	requestFocus();
	return true;
	}
	return super.dispatchKeyEvent(event);
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
	if (!mChildrenFocused && keyCode == KeyEvent.KEYCODE_ENTER) {
	event.startTracking();
	return true;
	}
	return super.onKeyDown(keyCode, event);
	}

	@Override
	public boolean onKeyUp(int keyCode, KeyEvent event) {
	if (event.isTracking()) {
	if (!mChildrenFocused && keyCode == KeyEvent.KEYCODE_ENTER) {
	mChildrenFocused = true;
	ArrayList<View> focusableChildren = getFocusables(FOCUS_FORWARD);
	focusableChildren.remove(this);
	int childrenCount = focusableChildren.size();
	switch (childrenCount) {
	case 0:
	mChildrenFocused = false;
	break;
	case 1: {
	if (getTag() instanceof ItemInfo) {
	ItemInfo item = (ItemInfo) getTag();
	if (item.spanX == 1 && item.spanY == 1) {
	focusableChildren.get(0).performClick();
	mChildrenFocused = false;
	return true;
	}
	}
	// continue;
	}
	default:
	focusableChildren.get(0).requestFocus();
	return true;
	}
	}
	}
	return super.onKeyUp(keyCode, event);
	}

	@Override
	protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
	if (gainFocus) {
	mChildrenFocused = false;
	dispatchChildFocus(false);
	}
	super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
	}

	@Override
	public void requestChildFocus(View child, View focused) {
	super.requestChildFocus(child, focused);
	dispatchChildFocus(focused != null);
	if (focused != null) {
	focused.setFocusableInTouchMode(false);
	}
	}

	@Override
	public void clearChildFocus(View child) {
	super.clearChildFocus(child);
	dispatchChildFocus(false);
	}

	@Override
	public boolean dispatchUnhandledMove(View focused, int direction) {
	return mChildrenFocused;
	}

	private void dispatchChildFocus(boolean childIsFocused) {
	// The host view's background changes when selected, to indicate the focus is inside.
	setSelected(childIsFocused);
	}

	@Override
	protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
	try {
	super.onLayout(changed, left, top, right, bottom);
	} catch (final RuntimeException e) {
	post(new Runnable() {
	@Override
	public void run() {
	// Update the widget with 0 Layout id, to reset the view to error view.
	updateAppWidget(new RemoteViews(getAppWidgetInfo().provider.getPackageName(), 0));
	}
	});
	}
	}

	@Override
	public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
	super.onInitializeAccessibilityNodeInfo(info);
	info.setClassName(getClass().getName());
	}
	}