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authorJason A. Donenfeld <Jason@zx2c4.com>2018-07-29 16:43:19 +0200
committerJason A. Donenfeld <Jason@zx2c4.com>2018-07-29 17:21:30 +0200
commit798dcfb7bda4bc7c1c63166734450245dc8294d5 (patch)
tree717e443caa9c415bff3f3c08260a68b13c058ed8 /app/src/main/java/com/wireguard
parentRoll back to API 27 for now (diff)
downloadwireguard-android-798dcfb7bda4bc7c1c63166734450245dc8294d5.tar.xz
wireguard-android-798dcfb7bda4bc7c1c63166734450245dc8294d5.zip
FloatingActionButtonBehavior: animate transitions
Diffstat (limited to 'app/src/main/java/com/wireguard')
-rw-r--r--app/src/main/java/com/wireguard/android/widget/fab/FloatingActionButtonBehavior.java36
1 files changed, 32 insertions, 4 deletions
diff --git a/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionButtonBehavior.java b/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionButtonBehavior.java
index c41687b0..ff2adf5a 100644
--- a/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionButtonBehavior.java
+++ b/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionButtonBehavior.java
@@ -6,13 +6,19 @@
package com.wireguard.android.widget.fab;
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.TimeInterpolator;
+import android.animation.ValueAnimator;
import android.content.Context;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.Snackbar;
+import android.support.v4.view.animation.FastOutSlowInInterpolator;
import android.util.AttributeSet;
import android.view.View;
public class FloatingActionButtonBehavior extends CoordinatorLayout.Behavior<FloatingActionsMenu> {
+
public FloatingActionButtonBehavior(final Context context, final AttributeSet attrs) {
super(context, attrs);
}
@@ -23,17 +29,39 @@ public class FloatingActionButtonBehavior extends CoordinatorLayout.Behavior<Flo
return dependency instanceof Snackbar.SnackbarLayout;
}
+ private static final long ANIMATION_DURATION = 250;
+ private static final TimeInterpolator FAST_OUT_SLOW_IN_INTERPOLATOR = new FastOutSlowInInterpolator();
+
+ private static void animateChange(final FloatingActionsMenu child, final float destination, final float fullSpan) {
+ final float origin = child.getBehaviorYTranslation();
+ if (Math.abs(destination - origin) < fullSpan / 2) {
+ child.setBehaviorYTranslation(destination);
+ return;
+ }
+ final ValueAnimator animator = new ValueAnimator();
+ animator.setFloatValues(origin, destination);
+ animator.setInterpolator(FAST_OUT_SLOW_IN_INTERPOLATOR);
+ animator.setDuration((long)(ANIMATION_DURATION * (Math.abs(destination - origin) / fullSpan)));
+ animator.addListener(new AnimatorListenerAdapter() {
+ @Override
+ public void onAnimationEnd(final Animator a) {
+ child.setBehaviorYTranslation(destination);
+ }
+ });
+ animator.addUpdateListener(a -> child.setBehaviorYTranslation((float)a.getAnimatedValue()));
+ animator.start();
+ }
+
@Override
public boolean onDependentViewChanged(final CoordinatorLayout parent, final FloatingActionsMenu child,
final View dependency) {
- child.setBehaviorYTranslation(Math.min(0, dependency.getTranslationY() - dependency.getMeasuredHeight()));
+ animateChange(child, Math.min(0, dependency.getTranslationY() - dependency.getMeasuredHeight()), dependency.getMeasuredHeight());
return true;
}
@Override
- public void onDependentViewRemoved(final CoordinatorLayout parent, FloatingActionsMenu child,
+ public void onDependentViewRemoved(final CoordinatorLayout parent, final FloatingActionsMenu child,
final View dependency) {
- // TODO(msf): animate this so it isn't so dramatic when the snackbar is swiped away
- child.setBehaviorYTranslation(0);
+ animateChange(child, 0, dependency.getMeasuredHeight());
}
}