1 files changed, 0 insertions, 141 deletions
diff --git a/src/com/android/gallery3d/ui/FlingScroller.java b/src/com/android/gallery3d/ui/FlingScroller.java
deleted file mode 100644
index 6f98c64f9..000000000
--- a/src/com/android/gallery3d/ui/FlingScroller.java
+++ /dev/null
@@ -1,141 +0,0 @@
-/*
- * Copyright (C) 2011 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 com.android.gallery3d.ui;
-
-
-// This is a customized version of Scroller, with a interface similar to
-// android.widget.Scroller. It does fling only, not scroll.
-//
-// The differences between the this Scroller and the system one are:
-//
-// (1) The velocity does not change because of min/max limit.
-// (2) The duration is different.
-// (3) The deceleration curve is different.
-class FlingScroller {
-    @SuppressWarnings("unused")
-    private static final String TAG = "FlingController";
-
-    // The fling duration (in milliseconds) when velocity is 1 pixel/second
-    private static final float FLING_DURATION_PARAM = 50f;
-    private static final int DECELERATED_FACTOR = 4;
-
-    private int mStartX, mStartY;
-    private int mMinX, mMinY, mMaxX, mMaxY;
-    private double mSinAngle;
-    private double mCosAngle;
-    private int mDuration;
-    private int mDistance;
-    private int mFinalX, mFinalY;
-
-    private int mCurrX, mCurrY;
-    private double mCurrV;
-
-    public int getFinalX() {
-        return mFinalX;
-    }
-
-    public int getFinalY() {
-        return mFinalY;
-    }
-
-    public int getDuration() {
-        return mDuration;
-    }
-
-    public int getCurrX() {
-        return mCurrX;
-
-    }
-
-    public int getCurrY() {
-        return mCurrY;
-    }
-
-    public int getCurrVelocityX() {
-        return (int)Math.round(mCurrV * mCosAngle);
-    }
-
-    public int getCurrVelocityY() {
-        return (int)Math.round(mCurrV * mSinAngle);
-    }
-
-    public void fling(int startX, int startY, int velocityX, int velocityY,
-            int minX, int maxX, int minY, int maxY) {
-        mStartX = startX;
-        mStartY = startY;
-        mMinX = minX;
-        mMinY = minY;
-        mMaxX = maxX;
-        mMaxY = maxY;
-
-        double velocity = Math.hypot(velocityX, velocityY);
-        mSinAngle = velocityY / velocity;
-        mCosAngle = velocityX / velocity;
-        //
-        // The position formula: x(t) = s + (e - s) * (1 - (1 - t / T) ^ d)
-        //     velocity formula: v(t) = d * (e - s) * (1 - t / T) ^ (d - 1) / T
-        // Thus,
-        //     v0 = d * (e - s) / T => (e - s) = v0 * T / d
-        //
-
-        // Ta = T_ref * (Va / V_ref) ^ (1 / (d - 1)); V_ref = 1 pixel/second;
-        mDuration = (int)Math.round(FLING_DURATION_PARAM
-                * Math.pow(Math.abs(velocity), 1.0 / (DECELERATED_FACTOR - 1)));
-
-        // (e - s) = v0 * T / d
-        mDistance = (int)Math.round(
-                velocity * mDuration / DECELERATED_FACTOR / 1000);
-
-        mFinalX = getX(1.0f);
-        mFinalY = getY(1.0f);
-    }
-
-    public void computeScrollOffset(float progress) {
-        progress = Math.min(progress, 1);
-        float f = 1 - progress;
-        f = 1 - (float) Math.pow(f, DECELERATED_FACTOR);
-        mCurrX = getX(f);
-        mCurrY = getY(f);
-        mCurrV = getV(progress);
-    }
-
-    private int getX(float f) {
-        int r = (int) Math.round(mStartX + f * mDistance * mCosAngle);
-        if (mCosAngle > 0 && mStartX <= mMaxX) {
-            r = Math.min(r, mMaxX);
-        } else if (mCosAngle < 0 && mStartX >= mMinX) {
-            r = Math.max(r, mMinX);
-        }
-        return r;
-    }
-
-    private int getY(float f) {
-        int r = (int) Math.round(mStartY + f * mDistance * mSinAngle);
-        if (mSinAngle > 0 && mStartY <= mMaxY) {
-            r = Math.min(r, mMaxY);
-        } else if (mSinAngle < 0 && mStartY >= mMinY) {
-            r = Math.max(r, mMinY);
-        }
-        return r;
-    }
-
-    private double getV(float progress) {
-        // velocity formula: v(t) = d * (e - s) * (1 - t / T) ^ (d - 1) / T
-        return DECELERATED_FACTOR * mDistance * 1000 *
-                Math.pow(1 - progress, DECELERATED_FACTOR - 1) / mDuration;
-    }
-}