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/*
* Copyright (C) 2016 Cyanogen, Inc.
* Copyright (C) 2016 The CyanogenMod 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.v4.view;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import org.cyanogenmod.theme.chooser2.R;
public class ThemeViewPager extends ViewPager {
private static final String TAG = ThemeViewPager.class.getSimpleName();
private boolean mExpanded;
private boolean mIsAnimating;
private boolean mIsDragging = false;
private float mSlop;
private float mLastX;
private float mLastY;
private boolean mScrollingEnabled = true;
private boolean mClickedContent = false;
public ThemeViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}
private void initView(Context context) {
mSlop = ViewConfiguration.get(context).getScaledTouchSlop();
}
public void setExpanded(boolean expanded) {
mExpanded = expanded;
}
public void setAnimating(boolean isAnimating) {
mIsAnimating = isAnimating;
}
public boolean isClickedOnContent() {
return mClickedContent;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
boolean intercept = false;
if (!mExpanded && isEnabled() && !mIsAnimating) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
intercept = getChildCount() > 0
&& !isTouching(R.id.overflow, ev)
&& !isTouching(R.id.confirm_cancel_overlay, ev)
&& !isTouching(R.id.customize_reset_theme_layout, ev);
break;
}
}
return intercept;
}
private boolean isTouching(int viewId, MotionEvent ev) {
int x = (int) ev.getRawX();
int y = (int) ev.getRawY();
View v = getViewForPosition(getCurrentItem());
if (v == null) return false;
View touchedView = v.findViewById(viewId);
if (touchedView == null ||
touchedView.getVisibility() != View.VISIBLE ||
!touchedView.isEnabled()) {
return false;
}
int location[] = new int[2];
touchedView.getLocationOnScreen(location);
int viewX = location[0];
int viewY = location[1];
if((x > viewX && x < (viewX + touchedView.getWidth())) &&
( y > viewY && y < (viewY + touchedView.getHeight()))){
return true;
} else {
return false;
}
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mLastX = ev.getX();
mLastY = ev.getY();
break;
case MotionEvent.ACTION_MOVE:
float xDist = Math.abs(mLastX - ev.getX());
float yDist = Math.abs(mLastY - ev.getY());
if (xDist > mSlop || yDist > mSlop) {
mIsDragging = true;
}
break;
case MotionEvent.ACTION_CANCEL:
mIsDragging = false;
break;
case MotionEvent.ACTION_UP:
if (!mIsDragging) {
mClickedContent = isTouching(R.id.clickable_view, ev);
View clickableView = getViewForPosition(getCurrentItem(), R.id.clickable_view);
if (clickableView != null) {
// only play the click sound when we click on the content :)
setSoundEffectsEnabled(mClickedContent &&
clickableView.isSoundEffectsEnabled());
}
performClick();
}
mIsDragging = false;
break;
}
if (mExpanded || (!mScrollingEnabled && mIsDragging)) {
return false;
}
/**
* Work around AOSP issue #18990
* https://code.google.com/p/android/issues/detail?id=18990
*/
try {
return super.onTouchEvent(ev);
} catch (IllegalArgumentException e) {
Log.w(TAG, "Failed while calling super.onTouchEvent()", e);
}
return false;
}
/**
* This method will return the view associated with a given position. This is neccessary
* because the index value in 'getChildAt(index)' does not neccessarily associate with
* the viewpager's position.
*
*/
public View getViewForPosition(int position) {
View view = null;
for(int i=0; i < getChildCount(); i++) {
View v = getChildAt(i);
ItemInfo info = infoForChild(v);
if (info != null && position == info.position) {
view = v;
break;
}
}
return view;
}
/**
* Like getViewForPosition(int position), but will return a specific child view with
* id viewId.
*/
public View getViewForPosition(int position, int id) {
View parent = getViewForPosition(position);
if (parent != null) {
return parent.findViewById(id);
}
return null;
}
public void setScrollingEnabled(boolean enabled) {
mScrollingEnabled = enabled;
}
}
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