ADD week 5

2025-03-31 16:33:42 +02:00
parent 86f265f22d
commit bf645048e6
4927 changed files with 544053 additions and 0 deletions
--- a/02-Easy5/E5/sources/androidx/viewpager2/widget/FakeDrag.java
+++ b/02-Easy5/E5/sources/androidx/viewpager2/widget/FakeDrag.java
@@ -0,0 +1,94 @@
+package androidx.viewpager2.widget;
+
+import android.os.SystemClock;
+import android.view.MotionEvent;
+import android.view.VelocityTracker;
+import android.view.ViewConfiguration;
+import androidx.recyclerview.widget.RecyclerView;
+
+/* loaded from: classes.dex */
+final class FakeDrag {
+    private int mActualDraggedDistance;
+    private long mFakeDragBeginTime;
+    private int mMaximumVelocity;
+    private final RecyclerView mRecyclerView;
+    private float mRequestedDragDistance;
+    private final ScrollEventAdapter mScrollEventAdapter;
+    private VelocityTracker mVelocityTracker;
+    private final ViewPager2 mViewPager;
+
+    FakeDrag(ViewPager2 viewPager2, ScrollEventAdapter scrollEventAdapter, RecyclerView recyclerView) {
+        this.mViewPager = viewPager2;
+        this.mScrollEventAdapter = scrollEventAdapter;
+        this.mRecyclerView = recyclerView;
+    }
+
+    boolean isFakeDragging() {
+        return this.mScrollEventAdapter.isFakeDragging();
+    }
+
+    boolean beginFakeDrag() {
+        if (this.mScrollEventAdapter.isDragging()) {
+            return false;
+        }
+        this.mActualDraggedDistance = 0;
+        this.mRequestedDragDistance = 0;
+        this.mFakeDragBeginTime = SystemClock.uptimeMillis();
+        beginFakeVelocityTracker();
+        this.mScrollEventAdapter.notifyBeginFakeDrag();
+        if (!this.mScrollEventAdapter.isIdle()) {
+            this.mRecyclerView.stopScroll();
+        }
+        addFakeMotionEvent(this.mFakeDragBeginTime, 0, 0.0f, 0.0f);
+        return true;
+    }
+
+    boolean fakeDragBy(float f) {
+        if (!this.mScrollEventAdapter.isFakeDragging()) {
+            return false;
+        }
+        float f2 = this.mRequestedDragDistance - f;
+        this.mRequestedDragDistance = f2;
+        int round = Math.round(f2 - this.mActualDraggedDistance);
+        this.mActualDraggedDistance += round;
+        long uptimeMillis = SystemClock.uptimeMillis();
+        boolean z = this.mViewPager.getOrientation() == 0;
+        int i = z ? round : 0;
+        int i2 = z ? 0 : round;
+        float f3 = z ? this.mRequestedDragDistance : 0.0f;
+        float f4 = z ? 0.0f : this.mRequestedDragDistance;
+        this.mRecyclerView.scrollBy(i, i2);
+        addFakeMotionEvent(uptimeMillis, 2, f3, f4);
+        return true;
+    }
+
+    boolean endFakeDrag() {
+        if (!this.mScrollEventAdapter.isFakeDragging()) {
+            return false;
+        }
+        this.mScrollEventAdapter.notifyEndFakeDrag();
+        VelocityTracker velocityTracker = this.mVelocityTracker;
+        velocityTracker.computeCurrentVelocity(1000, this.mMaximumVelocity);
+        if (this.mRecyclerView.fling((int) velocityTracker.getXVelocity(), (int) velocityTracker.getYVelocity())) {
+            return true;
+        }
+        this.mViewPager.snapToPage();
+        return true;
+    }
+
+    private void beginFakeVelocityTracker() {
+        VelocityTracker velocityTracker = this.mVelocityTracker;
+        if (velocityTracker == null) {
+            this.mVelocityTracker = VelocityTracker.obtain();
+            this.mMaximumVelocity = ViewConfiguration.get(this.mViewPager.getContext()).getScaledMaximumFlingVelocity();
+        } else {
+            velocityTracker.clear();
+        }
+    }
+
+    private void addFakeMotionEvent(long j, int i, float f, float f2) {
+        MotionEvent obtain = MotionEvent.obtain(this.mFakeDragBeginTime, j, i, f, f2, 0);
+        this.mVelocityTracker.addMovement(obtain);
+        obtain.recycle();
+    }
+}