Adding dampened snap back overscroll to Workspace and AppsCustomizePagedView
issue 15475254
Change-Id: I5eb9fc480167faf4be16bd17bf18e2d103f40f47
diff --git a/src/com/android/launcher3/AppsCustomizePagedView.java b/src/com/android/launcher3/AppsCustomizePagedView.java
index d23e65f..a47f1db 100644
--- a/src/com/android/launcher3/AppsCustomizePagedView.java
+++ b/src/com/android/launcher3/AppsCustomizePagedView.java
@@ -190,16 +190,6 @@
private int mNumWidgetPages;
private Rect mAllAppsPadding = new Rect();
- // Relating to the scroll and overscroll effects
- Workspace.ZInterpolator mZInterpolator = new Workspace.ZInterpolator(0.5f);
- private static float CAMERA_DISTANCE = 6500;
- private static float TRANSITION_SCALE_FACTOR = 0.74f;
- private static float TRANSITION_PIVOT = 0.65f;
- private static float TRANSITION_MAX_ROTATION = 22;
- private static final boolean PERFORM_OVERSCROLL_ROTATION = false;
- private AccelerateInterpolator mAlphaInterpolator = new AccelerateInterpolator(0.9f);
- private DecelerateInterpolator mLeftScreenAlphaInterpolator = new DecelerateInterpolator(4);
-
// Previews & outlines
ArrayList<AppsCustomizeAsyncTask> mRunningTasks;
private static final int sPageSleepDelay = 200;
@@ -1365,73 +1355,7 @@
// In apps customize, we have a scrolling effect which emulates pulling cards off of a stack.
@Override
protected void screenScrolled(int screenCenter) {
- final boolean isRtl = isLayoutRtl();
super.screenScrolled(screenCenter);
-
- for (int i = 0; i < getChildCount(); i++) {
- View v = getPageAt(i);
- if (v != null) {
- float scrollProgress = getScrollProgress(screenCenter, v, i);
-
- float interpolatedProgress;
- float translationX;
- float maxScrollProgress = Math.max(0, scrollProgress);
- float minScrollProgress = Math.min(0, scrollProgress);
-
- if (isRtl) {
- translationX = maxScrollProgress * v.getMeasuredWidth();
- interpolatedProgress = mZInterpolator.getInterpolation(Math.abs(maxScrollProgress));
- } else {
- translationX = minScrollProgress * v.getMeasuredWidth();
- interpolatedProgress = mZInterpolator.getInterpolation(Math.abs(minScrollProgress));
- }
- float scale = (1 - interpolatedProgress) +
- interpolatedProgress * TRANSITION_SCALE_FACTOR;
-
- float alpha;
- if (isRtl && (scrollProgress > 0)) {
- alpha = mAlphaInterpolator.getInterpolation(1 - Math.abs(maxScrollProgress));
- } else if (!isRtl && (scrollProgress < 0)) {
- alpha = mAlphaInterpolator.getInterpolation(1 - Math.abs(scrollProgress));
- } else {
- // On large screens we need to fade the page as it nears its leftmost position
- alpha = mLeftScreenAlphaInterpolator.getInterpolation(1 - scrollProgress);
- }
-
- v.setCameraDistance(mDensity * CAMERA_DISTANCE);
- int pageWidth = v.getMeasuredWidth();
- int pageHeight = v.getMeasuredHeight();
-
- if (PERFORM_OVERSCROLL_ROTATION) {
- float xPivot = isRtl ? 1f - TRANSITION_PIVOT : TRANSITION_PIVOT;
- boolean isOverscrollingFirstPage = isRtl ? scrollProgress > 0 : scrollProgress < 0;
- boolean isOverscrollingLastPage = isRtl ? scrollProgress < 0 : scrollProgress > 0;
-
- if (i == 0 && isOverscrollingFirstPage) {
- // Overscroll to the left
- v.setPivotX(xPivot * pageWidth);
- v.setRotationY(-TRANSITION_MAX_ROTATION * scrollProgress);
- scale = 1.0f;
- alpha = 1.0f;
- // On the first page, we don't want the page to have any lateral motion
- translationX = 0;
- } else if (i == getChildCount() - 1 && isOverscrollingLastPage) {
- // Overscroll to the right
- v.setPivotX((1 - xPivot) * pageWidth);
- v.setRotationY(-TRANSITION_MAX_ROTATION * scrollProgress);
- scale = 1.0f;
- alpha = 1.0f;
- // On the last page, we don't want the page to have any lateral motion.
- translationX = 0;
- } else {
- v.setPivotY(pageHeight / 2.0f);
- v.setPivotX(pageWidth / 2.0f);
- v.setRotationY(0f);
- }
- }
- }
- }
-
enableHwLayersOnVisiblePages();
}
@@ -1476,7 +1400,7 @@
}
protected void overScroll(float amount) {
- acceleratedOverScroll(amount);
+ dampedOverScroll(amount);
}
/**