/**
* This code was modified by me, Paul Woitaschek. All these changes are licensed under GPLv3. The
* original source can be found here: {@link https://github.com/alexjlockwood/material-pause-play-
* animation/blob/master/app/src/main/java/com/alexjlockwood/example/playpauseanimation/
* PlayPauseView.java}
* <p/>
* The original licensing is as follows:
* <p/>
* <p/>
* The MIT License (MIT)
* <p/>
* Copyright (c) 2015 Alex Lockwood
* <p/>
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
* associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute,
* sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* <p/>
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
* <p/>
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package io.hefuyi.listener.widget;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.support.annotation.ColorInt;
import android.util.Property;
public class PlayPauseDrawable extends Drawable {
private static final Property<PlayPauseDrawable, Float> PROGRESS = new Property<PlayPauseDrawable, Float>(Float.class, "progress") {
@Override
public Float get(PlayPauseDrawable d) {
return d.getProgress();
}
@Override
public void set(PlayPauseDrawable d, Float value) {
d.setProgress(value);
}
};
private final Path mLeftPauseBar = new Path();
private final Path mRightPauseBar = new Path();
private final Paint mPaint = new Paint();
private final RectF mBounds = new RectF();
private float mPauseBarWidth;
private float mPauseBarHeight;
private float mPauseBarDistance;
private float mWidth;
private float mHeight;
private float mProgress;
private boolean mIsPlay;
public void setmIsPlay(boolean mIsPlay) {
this.mIsPlay = mIsPlay;
}
public PlayPauseDrawable(Context context) {
final Resources res = context.getResources();
mPaint.setAntiAlias(true);
mPaint.setStyle(Paint.Style.FILL);
mPaint.setColor(Color.BLACK);
}
public PlayPauseDrawable(Context context, @ColorInt int color) {
final Resources res = context.getResources();
mPaint.setAntiAlias(true);
mPaint.setStyle(Paint.Style.FILL);
mPaint.setColor(color);
}
@Override
protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
mBounds.set(bounds);
mWidth = mBounds.width();
mHeight = mBounds.height();
mPauseBarWidth = mWidth / 8;
mPauseBarHeight = mHeight * 0.40f;
mPauseBarDistance = mPauseBarWidth;
}
@Override
public void draw(Canvas canvas) {
mLeftPauseBar.rewind();
mRightPauseBar.rewind();
// The current distance between the two pause bars.
final float barDist = lerp(mPauseBarDistance, 0, mProgress);
// The current width of each pause bar.
final float barWidth = lerp(mPauseBarWidth, mPauseBarHeight / 2f, mProgress);
// The current position of the left pause bar's top left coordinate.
final float firstBarTopLeft = lerp(0, barWidth, mProgress);
// The current position of the right pause bar's top right coordinate.
final float secondBarTopRight = lerp(2 * barWidth + barDist, barWidth + barDist, mProgress);
// Draw the left pause bar. The left pause bar transforms into the
// top half of the play button triangle by animating the position of the
// rectangle's top left coordinate and expanding its bottom width.
mLeftPauseBar.moveTo(0, 0);
mLeftPauseBar.lineTo(firstBarTopLeft, -mPauseBarHeight);
mLeftPauseBar.lineTo(barWidth, -mPauseBarHeight);
mLeftPauseBar.lineTo(barWidth, 0);
mLeftPauseBar.close();
// Draw the right pause bar. The right pause bar transforms into the
// bottom half of the play button triangle by animating the position of
// the
// rectangle's top right coordinate and expanding its bottom width.
mRightPauseBar.moveTo(barWidth + barDist, 0);
mRightPauseBar.lineTo(barWidth + barDist, -mPauseBarHeight);
mRightPauseBar.lineTo(secondBarTopRight, -mPauseBarHeight);
mRightPauseBar.lineTo(2 * barWidth + barDist, 0);
mRightPauseBar.close();
canvas.save();
// Translate the play button a tiny bit to the right so it looks more
// centered.
canvas.translate(lerp(0, mPauseBarHeight / 8f, mProgress), 0);
// (1) Pause --> Play: rotate 0 to 90 degrees clockwise.
// (2) Play --> Pause: rotate 90 to 180 degrees clockwise.
final float rotationProgress = mIsPlay ? 1 - mProgress : mProgress;
final float startingRotation = mIsPlay ? 90 : 0;
canvas.rotate(lerp(startingRotation, startingRotation + 90, rotationProgress), mWidth / 2f, mHeight / 2f);
// Position the pause/play button in the center of the drawable's
// bounds.
canvas.translate(mWidth / 2f - ((2 * barWidth + barDist) / 2f), mHeight / 2f + (mPauseBarHeight / 2f));
// Draw the two bars that form the animated pause/play button.
canvas.drawPath(mLeftPauseBar, mPaint);
canvas.drawPath(mRightPauseBar, mPaint);
canvas.restore();
}
public Animator getPausePlayAnimator() {
final Animator anim = ObjectAnimator.ofFloat(this, PROGRESS, mIsPlay ? 1 : 0, mIsPlay ? 0 : 1);
anim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mIsPlay = !mIsPlay;
}
});
return anim;
}
public boolean isPlay() {
return mIsPlay;
}
private void setProgress(float progress) {
mProgress = progress;
invalidateSelf();
}
private float getProgress() {
return mProgress;
}
@Override
public void setAlpha(int alpha) {
mPaint.setAlpha(alpha);
invalidateSelf();
}
public void setDrawableColor(@ColorInt int color) {
mPaint.setColor(color);
invalidateSelf();
}
@Override
public void setColorFilter(ColorFilter cf) {
mPaint.setColorFilter(cf);
invalidateSelf();
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
/**
* Linear interpolate between a and b with parameter t.
*/
private static float lerp(float a, float b, float t) {
return a + (b - a) * t;
}
}