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Implement cliff guard for swipeDismiss gesture

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BUG: 14319825

Change-Id: I6a80c91b4a6ee2eaf49a8c0c69065d4b97d7f8f2
This commit is contained in:
Mark Renouf
2014-05-01 14:18:40 -04:00
parent 7f6ab17d41
commit 11b1469144
2 changed files with 10 additions and 12 deletions
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20
core/java/com/android/internal/widget/SwipeDismissLayout.java
View File

@ -35,7 +35,7 @@ import android.widget.FrameLayout;
public class SwipeDismissLayout extends FrameLayout {
private static final String TAG = "SwipeDismissLayout";
private static final float TRANSLATION_MIN_ALPHA = 0.5f;
private static final float DISMISS_MIN_PROGRESS = 0.6f;
public interface OnDismissedListener {
void onDismissed(SwipeDismissLayout layout);
@ -77,6 +77,8 @@ public class SwipeDismissLayout extends FrameLayout {
private OnDismissedListener mDismissedListener;
private OnSwipeProgressChangedListener mProgressListener;
private float mLastX;
public SwipeDismissLayout(Context context) {
super(context);
init(context);
@ -95,7 +97,7 @@ public class SwipeDismissLayout extends FrameLayout {
private void init(Context context) {
ViewConfiguration vc = ViewConfiguration.get(getContext());
mSlop = vc.getScaledTouchSlop();
mMinFlingVelocity = vc.getScaledMinimumFlingVelocity() * 16;
mMinFlingVelocity = vc.getScaledMinimumFlingVelocity();
mMaxFlingVelocity = vc.getScaledMaximumFlingVelocity();
mAnimationTime = getContext().getResources().getInteger(
android.R.integer.config_shortAnimTime);
@ -193,8 +195,8 @@ public class SwipeDismissLayout extends FrameLayout {
case MotionEvent.ACTION_MOVE:
mVelocityTracker.addMovement(ev);
mLastX = ev.getRawX();
updateSwiping(ev);
updateDismiss(ev);
if (mSwiping) {
setProgress(ev.getRawX() - mDownX);
break;
@ -256,20 +258,16 @@ public class SwipeDismissLayout extends FrameLayout {
float absVelocityX = Math.abs(velocityX);
float absVelocityY = Math.abs(mVelocityTracker.getYVelocity());
if (deltaX > getWidth() / 2) {
mDismissed = true;
} else if (absVelocityX >= mMinFlingVelocity
&& absVelocityX <= mMaxFlingVelocity
&& absVelocityY < absVelocityX / 2
&& velocityX > 0
&& deltaX > 0) {
if (deltaX > (getWidth() * DISMISS_MIN_PROGRESS) &&
absVelocityX < mMinFlingVelocity &&
ev.getRawX() >= mLastX) {
mDismissed = true;
}
}
// Check if the user tried to undo this.
if (mDismissed && mSwiping) {
// Check if the user's finger is actually back
if (deltaX < getWidth() / 2) {
if (deltaX < (getWidth() * DISMISS_MIN_PROGRESS)) {
mDismissed = false;
}
}

2
core/res/res/values-watch/config.xml
View File

@ -32,7 +32,7 @@
<dimen name="config_viewConfigurationTouchSlop">4dp</dimen>
<!-- Minimum velocity to initiate a fling, as measured in dips per second. -->
<dimen name="config_viewMinFlingVelocity">50dp</dimen>
<dimen name="config_viewMinFlingVelocity">500dp</dimen>
<!-- Maximum velocity to initiate a fling, as measured in dips per second. -->
<dimen name="config_viewMaxFlingVelocity">8000dp</dimen>