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/*
* 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 org.cyanogenmod.audiofx.eq;
import android.content.Context;
import android.provider.Settings;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import org.cyanogenmod.audiofx.R;
import org.cyanogenmod.audiofx.activity.EqualizerManager;
import org.cyanogenmod.audiofx.activity.MasterConfigControl;
import org.cyanogenmod.audiofx.preset.InfiniteViewPager;
public class EqSwipeController extends LinearLayout {
/*
* x velocity max for deciding whether to try to grab a bar
*/
private static final int X_VELOCITY_THRESH = 20;
private static final int MINIMUM_TIME_HOLD_TIME = 100;
EqContainerView mEq;
InfiniteViewPager mPager;
private VelocityTracker mVelocityTracker = null;
long mDownTime;
EqBarView mBar;
boolean mBarActive;
private ViewGroup mControls;
private final EqualizerManager mEqManager;
private float mDownPositionX;
private float mDownPositionY;
public EqSwipeController(Context context, AttributeSet attrs) {
super(context, attrs);
mEqManager = MasterConfigControl.getInstance(context).getEqualizerManager();
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mEq = (EqContainerView) findViewById(R.id.eq_container);
mPager = (InfiniteViewPager) findViewById(R.id.pager);
mControls = (ViewGroup) findViewById(R.id.eq_controls);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
// don't intercept touches over the EQ controls
if (mControls.getRight() > x && mControls.getTop() < y
&& mControls.getBottom() > y && mControls.getLeft() < x) {
return false;
}
return true;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
int index = event.getActionIndex();
int action = event.getActionMasked();
int pointerId = event.getPointerId(index);
switch (action) {
case MotionEvent.ACTION_DOWN:
mDownPositionX = event.getRawX();
mDownPositionY = event.getRawY();
mDownTime = System.currentTimeMillis();
if (mVelocityTracker == null) {
mVelocityTracker = VelocityTracker.obtain();
} else {
mVelocityTracker.clear();
}
mVelocityTracker.addMovement(event);
break;
case MotionEvent.ACTION_MOVE:
if (mVelocityTracker != null) {
mVelocityTracker.addMovement(event);
mVelocityTracker.computeCurrentVelocity(1000);
float xVelocity = mVelocityTracker.getXVelocity(pointerId);
float yVelocity = mVelocityTracker.getYVelocity(pointerId);
final float deltaX = mDownPositionX - event.getRawX();
final float deltaY = mDownPositionY - event.getRawY();
final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
final ViewConfiguration viewConfiguration = ViewConfiguration.get(getContext());
final int touchSlop = viewConfiguration.getScaledTouchSlop();
if (!mBarActive && !mEqManager.isChangingPresets()
&& !mEqManager.isEqualizerLocked()
&& Math.abs(xVelocity) < X_VELOCITY_THRESH
&& System.currentTimeMillis() - mDownTime > MINIMUM_TIME_HOLD_TIME) {
if (distanceSquared < touchSlop * touchSlop) {
mBarActive = true;
mBar = mEq.startTouchingBarUnder(event);
}
}
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
if (mVelocityTracker != null) {
mVelocityTracker.recycle();
mVelocityTracker = null;
}
if (mBarActive) {
// reset state?
if (mBar != null) {
mEq.stopBarInteraction(mBar);
mBar.endInteraction();
}
}
mBar = null;
mBarActive = false;
break;
}
if (mBarActive && mBar != null) {
return mBar.onTouchEvent(event);
} else {
return mPager.onTouchEvent(event);
}
}
}
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