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/*
* 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.launcher2;
import android.appwidget.AppWidgetHostView;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import com.android.launcher.R;
/**
* {@inheritDoc}
*/
public class LauncherAppWidgetHostView extends AppWidgetHostView
implements VisibilityChangedBroadcaster {
private boolean mHasPerformedLongPress;
private CheckForLongPress mPendingCheckForLongPress;
private LayoutInflater mInflater;
private VisibilityChangedListener mOnVisibilityChangedListener;
public LauncherAppWidgetHostView(Context context) {
super(context);
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
protected View getErrorView() {
return mInflater.inflate(R.layout.appwidget_error, this, false);
}
public boolean onInterceptTouchEvent(MotionEvent ev) {
// Consume any touch events for ourselves after longpress is triggered
if (mHasPerformedLongPress) {
mHasPerformedLongPress = false;
return true;
}
// Watch for longpress events at this level to make sure
// users can always pick up this widget
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN: {
postCheckForLongClick();
break;
}
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
mHasPerformedLongPress = false;
if (mPendingCheckForLongPress != null) {
removeCallbacks(mPendingCheckForLongPress);
}
break;
}
// Otherwise continue letting touch events fall through to children
return false;
}
class CheckForLongPress implements Runnable {
private int mOriginalWindowAttachCount;
public void run() {
if ((mParent != null) && hasWindowFocus()
&& mOriginalWindowAttachCount == getWindowAttachCount()
&& !mHasPerformedLongPress) {
if (performLongClick()) {
mHasPerformedLongPress = true;
}
}
}
public void rememberWindowAttachCount() {
mOriginalWindowAttachCount = getWindowAttachCount();
}
}
private void postCheckForLongClick() {
mHasPerformedLongPress = false;
if (mPendingCheckForLongPress == null) {
mPendingCheckForLongPress = new CheckForLongPress();
}
mPendingCheckForLongPress.rememberWindowAttachCount();
postDelayed(mPendingCheckForLongPress, ViewConfiguration.getLongPressTimeout());
}
@Override
public void cancelLongPress() {
super.cancelLongPress();
mHasPerformedLongPress = false;
if (mPendingCheckForLongPress != null) {
removeCallbacks(mPendingCheckForLongPress);
}
}
public void setVisibilityChangedListener(VisibilityChangedListener listener) {
mOnVisibilityChangedListener = listener;
}
@Override
protected void onVisibilityChanged(View changedView, int visibility) {
if (mOnVisibilityChangedListener != null) {
mOnVisibilityChangedListener.receiveVisibilityChangedMessage(this);
}
super.onVisibilityChanged(changedView, visibility);
}
}
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