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/*
* Copyright (C) 2017 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.tv.menu;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.util.AttributeSet;
import android.view.View;
import com.android.tv.R;
/**
* A progress bar control which has two progresses which start in the middle of the control.
*/
public class PlaybackProgressBar extends View {
private final LayerDrawable mProgressDrawable;
private final Drawable mPrimaryDrawable;
private final Drawable mSecondaryDrawable;
private long mMax = 100;
private long mProgressStart = 0;
private long mProgressEnd = 0;
private long mProgress = 0;
public PlaybackProgressBar(Context context) {
this(context, null);
}
public PlaybackProgressBar(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public PlaybackProgressBar(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public PlaybackProgressBar(Context context, AttributeSet attrs, int defStyleAttr,
int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
TypedArray a = context.obtainStyledAttributes(
attrs, R.styleable.PlaybackProgressBar, defStyleAttr, defStyleRes);
mProgressDrawable =
(LayerDrawable) a.getDrawable(R.styleable.PlaybackProgressBar_progressDrawable);
mPrimaryDrawable = mProgressDrawable.findDrawableByLayerId(android.R.id.progress);
mSecondaryDrawable =
mProgressDrawable.findDrawableByLayerId(android.R.id.secondaryProgress);
a.recycle();
refreshProgress();
}
@Override
protected void onDraw(Canvas canvas) {
final int saveCount = canvas.save();
canvas.translate(getPaddingLeft(), getPaddingTop());
mProgressDrawable.draw(canvas);
canvas.restoreToCount(saveCount);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
refreshProgress();
}
public void setMax(long max) {
if (max < 0) {
max = 0;
}
if (max != mMax) {
mMax = max;
if (mProgressStart > max) {
mProgressStart = max;
}
if (mProgressEnd > max) {
mProgressEnd = max;
}
if (mProgress > max) {
mProgress = max;
}
refreshProgress();
}
}
/**
* Sets the start and end position of the progress.
*/
public void setProgressRange(long start, long end) {
start = constrain(start, 0, mMax);
end = constrain(end, start, mMax);
mProgress = constrain(mProgress, start, end);
if (start != mProgressStart || end != mProgressEnd) {
mProgressStart = start;
mProgressEnd = end;
setProgressLevels();
}
}
/**
* Sets the progress position.
*/
public void setProgress(long progress) {
progress = constrain(progress, mProgressStart, mProgressEnd);
if (progress != mProgress) {
mProgress = progress;
setProgressLevels();
}
}
private long constrain(long value, long min, long max) {
return Math.min(Math.max(value, min), max);
}
private void refreshProgress() {
int width = getWidth() - getPaddingStart() - getPaddingEnd();
int height = getHeight() - getPaddingTop() - getPaddingBottom();
mProgressDrawable.setBounds(0, 0, width, height);
setProgressLevels();
}
private void setProgressLevels() {
boolean progressUpdated = setProgressBound(mPrimaryDrawable, mProgressStart, mProgress);
progressUpdated |= setProgressBound(mSecondaryDrawable, mProgress, mProgressEnd);
if (progressUpdated) {
postInvalidate();
}
}
private boolean setProgressBound(Drawable drawable, long start, long end) {
Rect oldBounds = drawable.getBounds();
if (mMax == 0) {
if (!isEqualRect(oldBounds, 0, 0, 0, 0)) {
drawable.setBounds(0, 0, 0, 0);
return true;
}
return false;
}
int width = mProgressDrawable.getBounds().width();
int height = mProgressDrawable.getBounds().height();
int left = (int) (width * start / mMax);
int right = (int) (width * end / mMax);
if (!isEqualRect(oldBounds, left, 0, right, height)) {
drawable.setBounds(left, 0, right, height);
return true;
}
return false;
}
private boolean isEqualRect(Rect rect, int left, int top, int right, int bottom) {
return rect.left == left && rect.top == top && rect.right == right && rect.bottom == bottom;
}
}
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