93 lines
3.4 KiB
Java
93 lines
3.4 KiB
Java
package androidx.transition;
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import android.annotation.SuppressLint;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Matrix;
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import android.graphics.Path;
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import android.graphics.PathMeasure;
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import android.util.AttributeSet;
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import androidx.core.content.res.TypedArrayUtils;
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import androidx.core.graphics.PathParser;
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import org.xmlpull.v1.XmlPullParser;
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public class PatternPathMotion extends PathMotion {
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private Path mOriginalPatternPath;
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private final Path mPatternPath;
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private final Matrix mTempMatrix;
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public PatternPathMotion() {
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Path path = new Path();
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this.mPatternPath = path;
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this.mTempMatrix = new Matrix();
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path.lineTo(1.0f, 0.0f);
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this.mOriginalPatternPath = path;
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}
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@SuppressLint({"RestrictedApi"})
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public PatternPathMotion(Context context, AttributeSet attributeSet) {
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this.mPatternPath = new Path();
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this.mTempMatrix = new Matrix();
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TypedArray obtainStyledAttributes = context.obtainStyledAttributes(attributeSet, Styleable.PATTERN_PATH_MOTION);
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try {
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String namedString = TypedArrayUtils.getNamedString(obtainStyledAttributes, (XmlPullParser) attributeSet, "patternPathData", 0);
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if (namedString != null) {
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setPatternPath(PathParser.createPathFromPathData(namedString));
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return;
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}
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throw new RuntimeException("pathData must be supplied for patternPathMotion");
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} finally {
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obtainStyledAttributes.recycle();
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}
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}
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public PatternPathMotion(Path path) {
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this.mPatternPath = new Path();
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this.mTempMatrix = new Matrix();
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setPatternPath(path);
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}
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private static float distance(float f, float f2) {
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return (float) Math.sqrt((double) ((f2 * f2) + (f * f)));
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}
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@Override // androidx.transition.PathMotion
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public Path getPath(float f, float f2, float f3, float f4) {
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float f5 = f3 - f;
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float f6 = f4 - f2;
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float distance = distance(f5, f6);
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double atan2 = Math.atan2((double) f6, (double) f5);
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this.mTempMatrix.setScale(distance, distance);
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this.mTempMatrix.postRotate((float) Math.toDegrees(atan2));
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this.mTempMatrix.postTranslate(f, f2);
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Path path = new Path();
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this.mPatternPath.transform(this.mTempMatrix, path);
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return path;
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}
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public Path getPatternPath() {
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return this.mOriginalPatternPath;
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}
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public void setPatternPath(Path path) {
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PathMeasure pathMeasure = new PathMeasure(path, false);
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float[] fArr = new float[2];
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pathMeasure.getPosTan(pathMeasure.getLength(), fArr, null);
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float f = fArr[0];
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float f2 = fArr[1];
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pathMeasure.getPosTan(0.0f, fArr, null);
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float f3 = fArr[0];
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float f4 = fArr[1];
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if (f3 == f && f4 == f2) {
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throw new IllegalArgumentException("pattern must not end at the starting point");
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}
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this.mTempMatrix.setTranslate(-f3, -f4);
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float f5 = f - f3;
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float f6 = f2 - f4;
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float distance = 1.0f / distance(f5, f6);
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this.mTempMatrix.postScale(distance, distance);
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this.mTempMatrix.postRotate((float) Math.toDegrees(-Math.atan2((double) f6, (double) f5)));
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path.transform(this.mTempMatrix, this.mPatternPath);
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this.mOriginalPatternPath = path;
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}
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}
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