ADD week 5

02-Easy5/E5/sources/androidx/viewpager2/widget/PageTransformerAdapter.java

@@ -0,0 +1,47 @@
+package androidx.viewpager2.widget;
+
+import android.view.View;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.viewpager2.widget.ViewPager2;
+import java.util.Locale;
+
+/* loaded from: classes.dex */
+final class PageTransformerAdapter extends ViewPager2.OnPageChangeCallback {
+    private final LinearLayoutManager mLayoutManager;
+    private ViewPager2.PageTransformer mPageTransformer;
+
+    ViewPager2.PageTransformer getPageTransformer() {
+        return this.mPageTransformer;
+    }
+
+    @Override // androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+    public void onPageScrollStateChanged(int i) {
+    }
+
+    @Override // androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+    public void onPageSelected(int i) {
+    }
+
+    void setPageTransformer(ViewPager2.PageTransformer pageTransformer) {
+        this.mPageTransformer = pageTransformer;
+    }
+
+    PageTransformerAdapter(LinearLayoutManager linearLayoutManager) {
+        this.mLayoutManager = linearLayoutManager;
+    }
+
+    @Override // androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+    public void onPageScrolled(int i, float f, int i2) {
+        if (this.mPageTransformer == null) {
+            return;
+        }
+        float f2 = -f;
+        for (int i3 = 0; i3 < this.mLayoutManager.getChildCount(); i3++) {
+            View childAt = this.mLayoutManager.getChildAt(i3);
+            if (childAt == null) {
+                throw new IllegalStateException(String.format(Locale.US, "LayoutManager returned a null child at pos %d/%d while transforming pages", Integer.valueOf(i3), Integer.valueOf(this.mLayoutManager.getChildCount())));
+            }
+            this.mPageTransformer.transformPage(childAt, (this.mLayoutManager.getPosition(childAt) - i) + f2);
+        }
+    }
+}