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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.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import org.cyanogenmod.audiofx.R;
import org.cyanogenmod.audiofx.activity.EqualizerManager;
import org.cyanogenmod.audiofx.activity.MasterConfigControl;
import org.cyanogenmod.audiofx.activity.StateCallbacks;
public class EqBarView extends FrameLayout implements StateCallbacks.EqUpdatedCallback {
private static final String TAG = EqBarView.class.getSimpleName();
private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
private EqualizerManager mEqManager;
private float mNormalWidth;
private float mParentHeight = -1;
private float mLastTouchX;
private float mLastTouchY;
private float mPosX;
private float mPosY = -1;
private boolean mUserInteracting;
private int mParentTop;
private Integer mIndex;
private float mInitialLevel;
public EqBarView(Context context) {
super(context);
init();
}
public EqBarView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public EqBarView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init() {
mEqManager = MasterConfigControl.getInstance(mContext).getEqualizerManager();
mNormalWidth = getResources().getDimension(R.dimen.eq_bar_width);
}
@Override
public boolean hasOverlappingRendering() {
return false;
}
private EqContainerView.EqBandInfo getInfo() {
return (EqContainerView.EqBandInfo) getTag();
}
public void setParentHeight(float h, int top) {
mParentHeight = h;
mParentTop = top;
updateHeight();
}
void updateHeight() {
if (DEBUG) Log.d(TAG, "updateHeight()");
if (getInfo() != null) {
float level = mEqManager.getLevel(getIndex());
float yProjection = 1 - mEqManager.projectY(level);
float height = (yProjection * (mParentHeight));
mPosY = height;
if (DEBUG) {
Log.d(TAG, getIndex() + "level: " + level + ", yProjection: "
+ yProjection + ", mPosY: " + mPosY);
}
updateHeight((int) mPosY);
} else {
if (DEBUG) Log.d(TAG, "could not updateHeight()");
}
}
public int getIndex() {
if (mIndex == null) {
mIndex = (getInfo()).mIndex;
}
return mIndex;
}
public boolean isUserInteracting() {
return mUserInteracting;
}
/* package */ void startInteraction(float x, float y) {
mLastTouchX = x;
mLastTouchY = y;
mUserInteracting = true;
if (DEBUG) Log.d(TAG, "initial level: " + mInitialLevel);
mInitialLevel = (1 - (mPosY / mParentHeight)) * (mEqManager.getMinDB() - mEqManager.getMaxDB())
- mEqManager.getMinDB();
updateWidth((int) (mNormalWidth * 2));
}
/* package */ void endInteraction() {
mUserInteracting = false;
updateWidth((int) mNormalWidth);
}
private void updateHeight(int h) {
if (!isInLayout()) {
final ViewGroup.LayoutParams params = getLayoutParams();
params.height = h;
setLayoutParams(params);
}
}
private void updateWidth(int w) {
final ViewGroup.LayoutParams params = getLayoutParams();
params.width = w;
setLayoutParams(params);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (mEqManager.isEqualizerLocked()) {
return false;
}
final float x = event.getRawX();
final float y = event.getRawY() - mParentTop;
switch (event.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
startInteraction(x, y);
break;
case MotionEvent.ACTION_MOVE:
// Calculate the distance moved
final float dx = x - mLastTouchX;
final float dy = y - mLastTouchY;
mPosX += dx;
mPosY -= dy;
// Remember this touch position for the next move event
mLastTouchX = x;
mLastTouchY = y;
int wy = (int) mParentHeight;
float level = (1 - (mPosY / wy)) * (mEqManager.getMinDB() - mEqManager.getMaxDB())
- mEqManager.getMinDB();
if (DEBUG) Log.d(TAG, "new level: " + level);
if (level < mEqManager.getMinDB()) {
level = mEqManager.getMinDB();
} else if (level > mEqManager.getMaxDB()) {
level = mEqManager.getMaxDB();
}
if (mInitialLevel != level) {
mEqManager.setLevel(getInfo().mIndex, level, false);
} else {
updateHeight();
}
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
endInteraction();
break;
}
return true;
}
public float getPosY() {
return mPosY;
}
@Override
public void onBandLevelChange(int band, float dB, boolean fromSystem) {
if (getInfo().mIndex != band) {
return;
}
updateHeight();
}
@Override
public void onPresetChanged(int newPresetIndex) {
}
@Override
public void onPresetsChanged() {
}
}
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