ViewSpline.java
/*
* 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.
*/
package androidx.constraintlayout.motion.utils;
import android.os.Build;
import android.util.Log;
import android.util.SparseArray;
import android.view.View;
import androidx.constraintlayout.core.motion.utils.CurveFit;
import androidx.constraintlayout.core.motion.utils.SplineSet;
import androidx.constraintlayout.motion.widget.Key;
import androidx.constraintlayout.motion.widget.MotionLayout;
import androidx.constraintlayout.widget.ConstraintAttribute;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public abstract class ViewSpline extends SplineSet {
private static final String TAG = "ViewSpline";
/**
* @TODO: add description
* @param str
* @param attrList
* @return
*/
public static ViewSpline makeCustomSpline(String str,
SparseArray<ConstraintAttribute> attrList) {
return new CustomSet(str, attrList);
}
/**
* @TODO: add description
* @param str
* @return
*/
public static ViewSpline makeSpline(String str) {
switch (str) {
case Key.ALPHA:
return new AlphaSet();
case Key.ELEVATION:
return new ElevationSet();
case Key.ROTATION:
return new RotationSet();
case Key.ROTATION_X:
return new RotationXset();
case Key.ROTATION_Y:
return new RotationYset();
case Key.PIVOT_X:
return new PivotXset();
case Key.PIVOT_Y:
return new PivotYset();
case Key.TRANSITION_PATH_ROTATE:
return new PathRotate();
case Key.SCALE_X:
return new ScaleXset();
case Key.SCALE_Y:
return new ScaleYset();
case Key.WAVE_OFFSET:
return new AlphaSet();
case Key.WAVE_VARIES_BY:
return new AlphaSet();
case Key.TRANSLATION_X:
return new TranslationXset();
case Key.TRANSLATION_Y:
return new TranslationYset();
case Key.TRANSLATION_Z:
return new TranslationZset();
case Key.PROGRESS:
return new ProgressSet();
default:
return null;
}
}
/**
* the main interface to setting a view property
* @param view the view
* @param t the point of time
*/
public abstract void setProperty(View view, float t);
static class ElevationSet extends ViewSpline {
@Override
public void setProperty(View view, float t) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
view.setElevation(get(t));
}
}
}
static class AlphaSet extends ViewSpline {
@Override
public void setProperty(View view, float t) {
view.setAlpha(get(t));
}
}
static class RotationSet extends ViewSpline {
@Override
public void setProperty(View view, float t) {
view.setRotation(get(t));
}
}
static class RotationXset extends ViewSpline {
@Override
public void setProperty(View view, float t) {
view.setRotationX(get(t));
}
}
static class RotationYset extends ViewSpline {
@Override
public void setProperty(View view, float t) {
view.setRotationY(get(t));
}
}
static class PivotXset extends ViewSpline {
@Override
public void setProperty(View view, float t) {
view.setPivotX(get(t));
}
}
static class PivotYset extends ViewSpline {
@Override
public void setProperty(View view, float t) {
view.setPivotY(get(t));
}
}
public static class PathRotate extends ViewSpline {
@Override
public void setProperty(View view, float t) {
}
/**
* Use to set the rotation relative to the path
* @param view the view to set
* @param t the time point
* @param dx the path velocity in x
* @param dy the path velocity in y
*/
public void setPathRotate(View view, float t, double dx, double dy) {
view.setRotation(get(t) + (float) Math.toDegrees(Math.atan2(dy, dx)));
}
}
static class ScaleXset extends ViewSpline {
@Override
public void setProperty(View view, float t) {
view.setScaleX(get(t));
}
}
static class ScaleYset extends ViewSpline {
@Override
public void setProperty(View view, float t) {
view.setScaleY(get(t));
}
}
static class TranslationXset extends ViewSpline {
@Override
public void setProperty(View view, float t) {
view.setTranslationX(get(t));
}
}
static class TranslationYset extends ViewSpline {
@Override
public void setProperty(View view, float t) {
view.setTranslationY(get(t));
}
}
static class TranslationZset extends ViewSpline {
@Override
public void setProperty(View view, float t) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
view.setTranslationZ(get(t));
}
}
}
public static class CustomSet extends ViewSpline {
String mAttributeName;
SparseArray<ConstraintAttribute> mConstraintAttributeList;
float[] mTempValues;
public CustomSet(String attribute, SparseArray<ConstraintAttribute> attrList) {
mAttributeName = attribute.split(",")[1];
mConstraintAttributeList = attrList;
}
/**
* @TODO: add description
* @param curveType
*/
public void setup(int curveType) {
int size = mConstraintAttributeList.size();
int dimensionality =
mConstraintAttributeList.valueAt(0).numberOfInterpolatedValues();
double[] time = new double[size];
mTempValues = new float[dimensionality];
double[][] values = new double[size][dimensionality];
for (int i = 0; i < size; i++) {
int key = mConstraintAttributeList.keyAt(i);
ConstraintAttribute ca = mConstraintAttributeList.valueAt(i);
time[i] = key * 1E-2;
ca.getValuesToInterpolate(mTempValues);
for (int k = 0; k < mTempValues.length; k++) {
values[i][k] = mTempValues[k];
}
}
mCurveFit = CurveFit.get(curveType, time, values);
}
/**
* this call will throw RuntimeException
* @param position the position
* @param value the value
*/
public void setPoint(int position, float value) {
throw new RuntimeException("call of custom attribute setPoint");
}
/**
* set the CustomAttribute
* @param position
* @param value
*/
public void setPoint(int position, ConstraintAttribute value) {
mConstraintAttributeList.append(position, value);
}
@Override
public void setProperty(View view, float t) {
mCurveFit.getPos(t, mTempValues);
CustomSupport.setInterpolatedValue(mConstraintAttributeList.valueAt(0),
view, mTempValues);
}
}
static class ProgressSet extends ViewSpline {
boolean mNoMethod = false;
@Override
public void setProperty(View view, float t) {
if (view instanceof MotionLayout) {
((MotionLayout) view).setProgress(get(t));
} else {
if (mNoMethod) {
return;
}
Method method = null;
try {
method = view.getClass().getMethod("setProgress", Float.TYPE);
} catch (NoSuchMethodException e) {
mNoMethod = true;
}
if (method != null) {
try {
method.invoke(view, get(t));
} catch (IllegalAccessException e) {
Log.e(TAG, "unable to setProgress", e);
} catch (InvocationTargetException e) {
Log.e(TAG, "unable to setProgress", e);
}
}
}
}
}
}