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package com.android.deskclock.widget;
/*
* Copyright (C) 2020 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.
*/
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Outline;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewOutlineProvider;
import androidx.appcompat.widget.AppCompatButton;
import com.android.deskclock.R;
/**
* A MotionButton is an AppCompatButton that can round its edges. <b>Added in 2.0</b>
* <p>
* Subclass of AppCompatButton to handle rounding edges dynamically.
* </p>
* <h2>MotionButton attributes</h2>
* <td>round</td>
* <td>(id) call the TransitionListener with this trigger id</td>
* </tr>
* <tr>
* <td>roundPercent</td>
* <td>Set the corner radius of curvature as a fraction of the smaller side.
* For squares 1 will result in a circle</td>
* </tr>
* <tr>
* <td>round</td>
* <td>Set the corner radius of curvature as a fraction of the smaller side.
* For squares 1 will result in a circle</td>
* </tr>
*
* </table>
*/
public class MotionButton extends AppCompatButton {
private float mRoundPercent = 0; // rounds the corners as a percent
private float mRound = Float.NaN; // rounds the corners in dp if NaN RoundPercent is in effect
private Path mPath;
ViewOutlineProvider mViewOutlineProvider;
RectF mRect;
public MotionButton(Context context) {
super(context);
init(context, null);
}
public MotionButton(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public MotionButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
setPadding(0, 0, 0, 0);
if (attrs != null) {
TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.MotionButton);
final int N = a.getIndexCount();
for (int i = 0; i < N; i++) {
int attr = a.getIndex(i);
if (attr == R.styleable.MotionButton_round) {
setRound(a.getDimension(attr, 0));
} else if (attr == R.styleable.MotionButton_roundPercent) {
setRoundPercent(a.getFloat(attr, 0));
}
}
a.recycle();
}
}
/**
* Set the corner radius of curvature as a fraction of the smaller side.
* For squares 1 will result in a circle
*
* @param round the radius of curvature as a fraction of the smaller width
*/
public void setRoundPercent(float round) {
boolean change = (mRoundPercent != round);
mRoundPercent = round;
if (mRoundPercent != 0.0f) {
if (mPath == null) {
mPath = new Path();
}
if (mRect == null) {
mRect = new RectF();
}
if (mViewOutlineProvider == null) {
mViewOutlineProvider = new ViewOutlineProvider() {
@Override
public void getOutline(View view, Outline outline) {
int w = getWidth();
int h = getHeight();
float r = Math.min(w, h) * mRoundPercent / 2;
outline.setRoundRect(0, 0, w, h, r);
}
};
setOutlineProvider(mViewOutlineProvider);
}
setClipToOutline(true);
int w = getWidth();
int h = getHeight();
float r = Math.min(w, h) * mRoundPercent / 2;
mRect.set(0, 0, w, h);
mPath.reset();
mPath.addRoundRect(mRect, r, r, Path.Direction.CW);
} else {
setClipToOutline(false);
}
if (change) {
invalidateOutline();
}
}
/**
* Set the corner radius of curvature
*
* @param round the radius of curvature NaN = default meaning roundPercent in effect
*/
public void setRound(float round) {
if (Float.isNaN(round)) {
mRound = round;
float tmp = mRoundPercent;
mRoundPercent = -1;
setRoundPercent(tmp); // force eval of roundPercent
return;
}
boolean change = (mRound != round);
mRound = round;
if (mRound != 0.0f) {
if (mPath == null) {
mPath = new Path();
}
if (mRect == null) {
mRect = new RectF();
}
if (mViewOutlineProvider == null) {
mViewOutlineProvider = new ViewOutlineProvider() {
@Override
public void getOutline(View view, Outline outline) {
int w = getWidth();
int h = getHeight();
outline.setRoundRect(0, 0, w, h, mRound);
}
};
setOutlineProvider(mViewOutlineProvider);
}
setClipToOutline(true);
int w = getWidth();
int h = getHeight();
mRect.set(0, 0, w, h);
mPath.reset();
mPath.addRoundRect(mRect, mRound, mRound, Path.Direction.CW);
} else {
setClipToOutline(false);
}
if (change) {
invalidateOutline();
}
}
}
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