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am 612d570a: DO NOT MERGE Adjust amount pull effects the glow and edge decay.

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Merge commit '612d570a6fc1e5a0e2e56250f597d1e96d698273' into gingerbread-plus-aosp

* commit '612d570a6fc1e5a0e2e56250f597d1e96d698273':
  DO NOT MERGE Adjust amount pull effects the glow and edge decay.
This commit is contained in:
Mindy Pereira
2010-10-08 12:10:09 -07:00
committed by Android Git Automerger
parent 98e1f3840f 612d570a6f
commit ab70a98b0e
1 changed files with 21 additions and 9 deletions
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30
core/java/android/widget/EdgeGlow.java
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@@ -91,6 +91,7 @@ public class EdgeGlow {
// How much dragging should effect the height of the glow image.
// Number determined by user testing.
private static final int PULL_DISTANCE_GLOW_FACTOR = 5;
private static final float PULL_DISTANCE_ALPHA_GLOW_FACTOR = 0.8f;
private static final int VELOCITY_EDGE_FACTOR = 8;
private static final int VELOCITY_GLOW_FACTOR = 16;
@@ -144,8 +145,10 @@ public class EdgeGlow {
mEdgeScaleY = mEdgeScaleYStart = Math.max(
HELD_EDGE_SCALE_Y, Math.min(distance * PULL_DISTANCE_EDGE_FACTOR, 1.f));
mGlowAlpha = mGlowAlphaStart = Math.max(
0.5f, Math.min(mGlowAlpha + Math.abs(deltaDistance), MAX_ALPHA));
mGlowAlpha = mGlowAlphaStart = Math.min(
mGlowAlpha +
(Math.abs(deltaDistance) * PULL_DISTANCE_ALPHA_GLOW_FACTOR),
MAX_ALPHA);
float glowChange = Math.abs(deltaDistance);
if (deltaDistance > 0 && mPullDistance < 0) {
@@ -202,8 +205,8 @@ public class EdgeGlow {
// The edge should always be at least partially visible, regardless
// of velocity.
mEdgeAlphaStart = 0.5f;
mEdgeScaleYStart = 0.2f;
mEdgeAlphaStart = 0.f;
mEdgeScaleY = mEdgeScaleYStart = 0.f;
// The glow depends more on the velocity, and therefore starts out
// nearly invisible.
mGlowAlphaStart = 0.5f;
@@ -213,7 +216,8 @@ public class EdgeGlow {
// reflect the strength of the user's scrolling.
mEdgeAlphaFinish = Math.max(0, Math.min(velocity * VELOCITY_EDGE_FACTOR, 1));
// Edge should never get larger than the size of its asset.
mEdgeScaleYFinish = 1.f;
mEdgeScaleYFinish = Math.max(
HELD_EDGE_SCALE_Y, Math.min(velocity * VELOCITY_EDGE_FACTOR, 1.f));
// Growth for the size of the glow should be quadratic to properly
// respond
@@ -281,10 +285,11 @@ public class EdgeGlow {
mGlowAlphaStart = mGlowAlpha;
mGlowScaleYStart = mGlowScaleY;
// After absorb, the glow and edge should fade to nothing.
mEdgeAlphaFinish = 0.f;
mEdgeScaleYFinish = mEdgeScaleY;
mEdgeScaleYFinish = 0.f;
mGlowAlphaFinish = 0.f;
mGlowScaleYFinish = mGlowScaleY;
mGlowScaleYFinish = 0.f;
break;
case STATE_PULL:
mState = STATE_PULL_DECAY;
@@ -296,14 +301,21 @@ public class EdgeGlow {
mGlowAlphaStart = mGlowAlpha;
mGlowScaleYStart = mGlowScaleY;
// After a pull, the glow should fade to nothing.
// After pull, the glow and edge should fade to nothing.
mEdgeAlphaFinish = 0.f;
mEdgeScaleYFinish = 0.f;
mGlowAlphaFinish = 0.f;
mGlowScaleYFinish = 0.f;
break;
case STATE_PULL_DECAY:
// Do nothing; wait for release
// When receding, we want edge to decrease more slowly
// than the glow.
float factor = mGlowScaleYFinish != 0 ? 1
/ (mGlowScaleYFinish * mGlowScaleYFinish)
: Float.MAX_VALUE;
mEdgeScaleY = mEdgeScaleYStart +
(mEdgeScaleYFinish - mEdgeScaleYStart) *
interp * factor;
break;
case STATE_RECEDE:
mState = STATE_IDLE;