[View Controllers] (3/3) Move (most of) KSBVC's alpha calculation

out of NPVController and into KSBVC.

Test: atest (+ new unit tests) and manual
Bug: 195442899
Change-Id: I59fcae0b98bf63e891a9109c0676cdc21b00dff6

packages/SystemUI/src/com/android/keyguard/dagger/KeyguardStatusBarViewComponent.java

@@ -19,6 +19,7 @@ package com.android.keyguard.dagger;
 import com.android.keyguard.KeyguardStatusViewController;
 import com.android.systemui.statusbar.phone.KeyguardStatusBarView;
 import com.android.systemui.statusbar.phone.KeyguardStatusBarViewController;
+import com.android.systemui.statusbar.phone.NotificationPanelViewController;
 
 import dagger.BindsInstance;
 import dagger.Subcomponent;
@@ -36,8 +37,8 @@ public interface KeyguardStatusBarViewComponent {
     interface Factory {
         KeyguardStatusBarViewComponent build(
                 @BindsInstance KeyguardStatusBarView view,
-                @BindsInstance KeyguardStatusBarViewController.ViewStateProvider
-                        viewStateProvider);
+                @BindsInstance NotificationPanelViewController.NotificationPanelViewStateProvider
+                        notificationPanelViewStateProvider);
     }
 
     /** Builds a {@link KeyguardStatusViewController}. */

packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardStatusBarViewController.java

@@ -25,6 +25,7 @@ import android.animation.AnimatorListenerAdapter;
 import android.animation.ValueAnimator;
 import android.content.res.Resources;
 import android.hardware.biometrics.BiometricSourceType;
+import android.util.MathUtils;
 import android.view.View;
 
 import androidx.annotation.NonNull;
@@ -40,6 +41,9 @@ import com.android.systemui.statusbar.StatusBarState;
 import com.android.systemui.statusbar.SysuiStatusBarStateController;
 import com.android.systemui.statusbar.events.SystemStatusAnimationCallback;
 import com.android.systemui.statusbar.events.SystemStatusAnimationScheduler;
+import com.android.systemui.statusbar.notification.AnimatableProperty;
+import com.android.systemui.statusbar.notification.PropertyAnimator;
+import com.android.systemui.statusbar.notification.stack.AnimationProperties;
 import com.android.systemui.statusbar.notification.stack.StackStateAnimator;
 import com.android.systemui.statusbar.policy.BatteryController;
 import com.android.systemui.statusbar.policy.ConfigurationController;
@@ -57,6 +61,21 @@ import javax.inject.Inject;
 
 /** View Controller for {@link com.android.systemui.statusbar.phone.KeyguardStatusBarView}. */
 public class KeyguardStatusBarViewController extends ViewController<KeyguardStatusBarView> {
+    private static final AnimationProperties KEYGUARD_HUN_PROPERTIES =
+            new AnimationProperties().setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD);
+
+    private float mKeyguardHeadsUpShowingAmount = 0.0f;
+    private final AnimatableProperty mHeadsUpShowingAmountAnimation = AnimatableProperty.from(
+            "KEYGUARD_HEADS_UP_SHOWING_AMOUNT",
+            (view, aFloat) -> {
+                mKeyguardHeadsUpShowingAmount = aFloat;
+                updateViewState();
+            },
+            view -> mKeyguardHeadsUpShowingAmount,
+            R.id.keyguard_hun_animator_tag,
+            R.id.keyguard_hun_animator_end_tag,
+            R.id.keyguard_hun_animator_start_tag);
+
     private final CarrierTextController mCarrierTextController;
     private final ConfigurationController mConfigurationController;
     private final SystemStatusAnimationScheduler mAnimationScheduler;
@@ -65,7 +84,8 @@ public class KeyguardStatusBarViewController extends ViewController<KeyguardStat
     private final StatusBarIconController mStatusBarIconController;
     private final StatusBarIconController.TintedIconManager.Factory mTintedIconManagerFactory;
     private final BatteryMeterViewController mBatteryMeterViewController;
-    private final ViewStateProvider mViewStateProvider;
+    private final NotificationPanelViewController.NotificationPanelViewStateProvider
+            mNotificationPanelViewStateProvider;
     private final KeyguardStateController mKeyguardStateController;
     private final KeyguardBypassController mKeyguardBypassController;
     private final KeyguardUpdateMonitor mKeyguardUpdateMonitor;
@@ -176,6 +196,7 @@ public class KeyguardStatusBarViewController extends ViewController<KeyguardStat
             };
 
     private final List<String> mBlockedIcons;
+    private final int mNotificationsHeaderCollideDistance;
 
     private boolean mBatteryListening;
     private StatusBarIconController.TintedIconManager mTintedIconManager;
@@ -193,6 +214,7 @@ public class KeyguardStatusBarViewController extends ViewController<KeyguardStat
     private boolean mDelayShowingKeyguardStatusBar;
     private int mStatusBarState;
     private boolean mDozing;
+    private boolean mShowingKeyguardHeadsUp;
 
     @Inject
     public KeyguardStatusBarViewController(
@@ -205,7 +227,8 @@ public class KeyguardStatusBarViewController extends ViewController<KeyguardStat
             StatusBarIconController statusBarIconController,
             StatusBarIconController.TintedIconManager.Factory tintedIconManagerFactory,
             BatteryMeterViewController batteryMeterViewController,
-            ViewStateProvider viewStateProvider,
+            NotificationPanelViewController.NotificationPanelViewStateProvider
+                    notificationPanelViewStateProvider,
             KeyguardStateController keyguardStateController,
             KeyguardBypassController bypassController,
             KeyguardUpdateMonitor keyguardUpdateMonitor,
@@ -220,7 +243,7 @@ public class KeyguardStatusBarViewController extends ViewController<KeyguardStat
         mStatusBarIconController = statusBarIconController;
         mTintedIconManagerFactory = tintedIconManagerFactory;
         mBatteryMeterViewController = batteryMeterViewController;
-        mViewStateProvider = viewStateProvider;
+        mNotificationPanelViewStateProvider = notificationPanelViewStateProvider;
         mKeyguardStateController = keyguardStateController;
         mKeyguardBypassController = bypassController;
         mKeyguardUpdateMonitor = keyguardUpdateMonitor;
@@ -245,6 +268,8 @@ public class KeyguardStatusBarViewController extends ViewController<KeyguardStat
                 r.getString(com.android.internal.R.string.status_bar_volume),
                 r.getString(com.android.internal.R.string.status_bar_alarm_clock),
                 r.getString(com.android.internal.R.string.status_bar_call_strength)));
+        mNotificationsHeaderCollideDistance = r.getDimensionPixelSize(
+                R.dimen.header_notifications_collide_distance);
     }
 
     @Override
@@ -355,16 +380,20 @@ public class KeyguardStatusBarViewController extends ViewController<KeyguardStat
     }
 
     /**
-     * Updates the {@link KeyguardStatusBarView} state based on what the {@link ViewStateProvider}
-     * and other controllers provide.
+     * Updates the {@link KeyguardStatusBarView} state based on what the
+     * {@link NotificationPanelViewController.NotificationPanelViewStateProvider} and other
+     * controllers provide.
      */
     public void updateViewState() {
-        ViewState newViewState = mViewStateProvider.provideViewState();
         if (!isKeyguardShowing()) {
             return;
         }
 
-        float newAlpha = newViewState.mAlpha * mKeyguardStatusBarAnimateAlpha;
+        float alphaQsExpansion = 1 - Math.min(
+                1, mNotificationPanelViewStateProvider.getQsExpansionFraction() * 2);
+        float newAlpha = Math.min(getKeyguardContentsAlpha(), alphaQsExpansion)
+                * mKeyguardStatusBarAnimateAlpha
+                * (1.0f - mKeyguardHeadsUpShowingAmount);
 
         boolean hideForBypass =
                 mFirstBypassAttempt && mKeyguardUpdateMonitor.shouldListenForFace()
@@ -383,6 +412,54 @@ public class KeyguardStatusBarViewController extends ViewController<KeyguardStat
         mView.setVisibility(visibility);
     }
 
+    /**
+     * @return the alpha to be used to fade out the contents on Keyguard (status bar, bottom area)
+     * during swiping up.
+     */
+    private float getKeyguardContentsAlpha() {
+        float alpha;
+        if (isKeyguardShowing()) {
+            // When on Keyguard, we hide the header as soon as we expanded close enough to the
+            // header
+            alpha = mNotificationPanelViewStateProvider.getPanelViewExpandedHeight()
+                    / (mView.getHeight() + mNotificationsHeaderCollideDistance);
+        } else {
+            // In SHADE_LOCKED, the top card is already really close to the header. Hide it as
+            // soon as we start translating the stack.
+            alpha = mNotificationPanelViewStateProvider.getPanelViewExpandedHeight()
+                    / mView.getHeight();
+        }
+        alpha = MathUtils.saturate(alpha);
+        alpha = (float) Math.pow(alpha, 0.75);
+        return alpha;
+    }
+
+    /**
+     * Update {@link KeyguardStatusBarView}'s visibility based on whether keyguard is showing and
+     * whether heads up is visible.
+     */
+    public void updateForHeadsUp() {
+        updateForHeadsUp(true);
+    }
+
+    void updateForHeadsUp(boolean animate) {
+        boolean showingKeyguardHeadsUp =
+                isKeyguardShowing() && mNotificationPanelViewStateProvider.shouldHeadsUpBeVisible();
+        if (mShowingKeyguardHeadsUp != showingKeyguardHeadsUp) {
+            mShowingKeyguardHeadsUp = showingKeyguardHeadsUp;
+            if (isKeyguardShowing()) {
+                PropertyAnimator.setProperty(
+                        mView,
+                        mHeadsUpShowingAmountAnimation,
+                        showingKeyguardHeadsUp ? 1.0f : 0.0f,
+                        KEYGUARD_HUN_PROPERTIES,
+                        animate);
+            } else {
+                PropertyAnimator.applyImmediately(mView, mHeadsUpShowingAmountAnimation, 0.0f);
+            }
+        }
+    }
+
     private boolean isKeyguardShowing() {
         return mStatusBarState == KEYGUARD;
     }
@@ -394,18 +471,4 @@ public class KeyguardStatusBarViewController extends ViewController<KeyguardStat
         mView.dump(fd, pw, args);
     }
 
-    /** An interface that provides the desired state of {@link KeyguardStatusBarView}. */
-    public interface ViewStateProvider {
-        /** Provides the state. */
-        ViewState provideViewState();
-    }
-
-    /** A POJO for the desired state of {@link KeyguardStatusBarView}. */
-    static class ViewState {
-        final float mAlpha;
-
-        ViewState(float alpha) {
-            this.mAlpha = alpha;
-        }
-    }
 }

packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java

@@ -176,7 +176,6 @@ import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.Executor;
 import java.util.function.Consumer;
-import java.util.function.Function;
 
 import javax.inject.Inject;
 import javax.inject.Provider;
@@ -257,17 +256,6 @@ public class NotificationPanelViewController extends PanelViewController {
     private static final Rect M_DUMMY_DIRTY_RECT = new Rect(0, 0, 1, 1);
     private static final Rect EMPTY_RECT = new Rect();
 
-    private final AnimatableProperty KEYGUARD_HEADS_UP_SHOWING_AMOUNT = AnimatableProperty.from(
-            "KEYGUARD_HEADS_UP_SHOWING_AMOUNT",
-            (notificationPanelView, aFloat) -> setKeyguardHeadsUpShowingAmount(aFloat),
-            (Function<NotificationPanelView, Float>) notificationPanelView ->
-                    getKeyguardHeadsUpShowingAmount(),
-            R.id.keyguard_hun_animator_tag, R.id.keyguard_hun_animator_end_tag,
-            R.id.keyguard_hun_animator_start_tag);
-    private static final AnimationProperties
-            KEYGUARD_HUN_PROPERTIES =
-            new AnimationProperties().setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD);
-
     private final LayoutInflater mLayoutInflater;
     private final PowerManager mPowerManager;
     private final AccessibilityManager mAccessibilityManager;
@@ -356,7 +344,6 @@ public class NotificationPanelViewController extends PanelViewController {
     private FlingAnimationUtils mFlingAnimationUtils;
     private int mStatusBarMinHeight;
     private int mStatusBarHeaderHeightKeyguard;
-    private int mNotificationsHeaderCollideDistance;
     private float mOverStretchAmount;
     private float mDownX;
     private float mDownY;
@@ -488,8 +475,6 @@ public class NotificationPanelViewController extends PanelViewController {
     private int mDarkIconSize;
     private int mHeadsUpInset;
     private boolean mHeadsUpPinnedMode;
-    private float mKeyguardHeadsUpShowingAmount = 0.0f;
-    private boolean mShowingKeyguardHeadsUp;
     private boolean mAllowExpandForSmallExpansion;
     private Runnable mExpandAfterLayoutRunnable;
 
@@ -632,17 +617,6 @@ public class NotificationPanelViewController extends PanelViewController {
         }
     };
 
-    private final KeyguardStatusBarViewController.ViewStateProvider mViewStateProvider =
-            new KeyguardStatusBarViewController.ViewStateProvider() {
-                @Override
-                public KeyguardStatusBarViewController.ViewState provideViewState() {
-                    float alphaQsExpansion = 1 - Math.min(1, computeQsExpansionFraction() * 2);
-                    float newAlpha = Math.min(getKeyguardContentsAlpha(), alphaQsExpansion)
-                            * (1.0f - mKeyguardHeadsUpShowingAmount);
-                    return new KeyguardStatusBarViewController.ViewState(newAlpha);
-                }
-            };
-
     @Inject
     public NotificationPanelViewController(NotificationPanelView view,
             @Main Resources resources,
@@ -831,7 +805,7 @@ public class NotificationPanelViewController extends PanelViewController {
         mKeyguardStatusBarViewController =
                 mKeyguardStatusBarViewComponentFactory.build(
                         mKeyguardStatusBar,
-                        mViewStateProvider)
+                        mNotificationPanelViewStateProvider)
                         .getKeyguardStatusBarViewController();
         mKeyguardStatusBarViewController.init();
 
@@ -865,7 +839,7 @@ public class NotificationPanelViewController extends PanelViewController {
         mWakeUpCoordinator.addListener(new NotificationWakeUpCoordinator.WakeUpListener() {
             @Override
             public void onFullyHiddenChanged(boolean isFullyHidden) {
-                updateKeyguardStatusBarForHeadsUp();
+                mKeyguardStatusBarViewController.updateForHeadsUp();
             }
 
             @Override
@@ -902,8 +876,6 @@ public class NotificationPanelViewController extends PanelViewController {
         mStatusBarHeaderHeightKeyguard = mResources.getDimensionPixelSize(
                 R.dimen.status_bar_header_height_keyguard);
         mQsPeekHeight = mResources.getDimensionPixelSize(R.dimen.qs_peek_height);
-        mNotificationsHeaderCollideDistance = mResources.getDimensionPixelSize(
-                R.dimen.header_notifications_collide_distance);
         mClockPositionAlgorithm.loadDimens(mResources);
         mQsFalsingThreshold = mResources.getDimensionPixelSize(R.dimen.qs_falsing_threshold);
         mPositionMinSideMargin = mResources.getDimensionPixelSize(
@@ -2914,30 +2886,6 @@ public class NotificationPanelViewController extends PanelViewController {
         return Math.min(0, translation);
     }
 
-    /**
-     * @return the alpha to be used to fade out the contents on Keyguard (status bar, bottom area)
-     * during swiping up
-     */
-    private float getKeyguardContentsAlpha() {
-        float alpha;
-        if (mBarState == KEYGUARD) {
-
-            // When on Keyguard, we hide the header as soon as we expanded close enough to the
-            // header
-            alpha =
-                    getExpandedHeight() / (mKeyguardStatusBar.getHeight()
-                            + mNotificationsHeaderCollideDistance);
-        } else {
-
-            // In SHADE_LOCKED, the top card is already really close to the header. Hide it as
-            // soon as we start translating the stack.
-            alpha = getExpandedHeight() / mKeyguardStatusBar.getHeight();
-        }
-        alpha = MathUtils.saturate(alpha);
-        alpha = (float) Math.pow(alpha, 0.75);
-        return alpha;
-    }
-
     private void updateKeyguardBottomAreaAlpha() {
         // There are two possible panel expansion behaviors:
         // • User dragging up to unlock: we want to fade out as quick as possible
@@ -3233,31 +3181,6 @@ public class NotificationPanelViewController extends PanelViewController {
         mPanelAlphaEndAction = r;
     }
 
-    private void updateKeyguardStatusBarForHeadsUp() {
-        boolean
-                showingKeyguardHeadsUp =
-                mKeyguardShowing && mHeadsUpAppearanceController.shouldBeVisible();
-        if (mShowingKeyguardHeadsUp != showingKeyguardHeadsUp) {
-            mShowingKeyguardHeadsUp = showingKeyguardHeadsUp;
-            if (mKeyguardShowing) {
-                PropertyAnimator.setProperty(mView, KEYGUARD_HEADS_UP_SHOWING_AMOUNT,
-                        showingKeyguardHeadsUp ? 1.0f : 0.0f, KEYGUARD_HUN_PROPERTIES,
-                        true /* animate */);
-            } else {
-                PropertyAnimator.applyImmediately(mView, KEYGUARD_HEADS_UP_SHOWING_AMOUNT, 0.0f);
-            }
-        }
-    }
-
-    private void setKeyguardHeadsUpShowingAmount(float amount) {
-        mKeyguardHeadsUpShowingAmount = amount;
-        mKeyguardStatusBarViewController.updateViewState();
-    }
-
-    private float getKeyguardHeadsUpShowingAmount() {
-        return mKeyguardHeadsUpShowingAmount;
-    }
-
     public void setHeadsUpAnimatingAway(boolean headsUpAnimatingAway) {
         mHeadsUpAnimatingAway = headsUpAnimatingAway;
         mNotificationStackScrollLayoutController.setHeadsUpAnimatingAway(headsUpAnimatingAway);
@@ -4223,7 +4146,7 @@ public class NotificationPanelViewController extends PanelViewController {
             updateGestureExclusionRect();
             mHeadsUpPinnedMode = inPinnedMode;
             updateHeadsUpVisibility();
-            updateKeyguardStatusBarForHeadsUp();
+            mKeyguardStatusBarViewController.updateForHeadsUp();
         }
 
         @Override
@@ -4382,7 +4305,7 @@ public class NotificationPanelViewController extends PanelViewController {
                     }
                 }
             }
-            updateKeyguardStatusBarForHeadsUp();
+            mKeyguardStatusBarViewController.updateForHeadsUp();
             if (keyguardShowing) {
                 updateDozingVisibilities(false /* animate */);
             }
@@ -4407,6 +4330,43 @@ public class NotificationPanelViewController extends PanelViewController {
         }
     }
 
+    /**
+     * An interface that provides the current state of the notification panel and related views,
+     * which is needed to calculate {@link KeyguardStatusBarView}'s state in
+     * {@link KeyguardStatusBarViewController}.
+     */
+    public interface NotificationPanelViewStateProvider {
+        /** Returns the expanded height of the panel view. */
+        float getPanelViewExpandedHeight();
+        /** Returns the fraction of QS that's expanded. */
+        float getQsExpansionFraction();
+        /**
+         * Returns true if heads up should be visible.
+         *
+         * TODO(b/138786270): If HeadsUpAppearanceController was injectable, we could inject it into
+         * {@link KeyguardStatusBarViewController} and remove this method.
+         */
+        boolean shouldHeadsUpBeVisible();
+    }
+
+    private final NotificationPanelViewStateProvider mNotificationPanelViewStateProvider =
+            new NotificationPanelViewStateProvider() {
+                @Override
+                public float getPanelViewExpandedHeight() {
+                    return getExpandedHeight();
+                }
+
+                @Override
+                public float getQsExpansionFraction() {
+                    return computeQsExpansionFraction();
+                }
+
+                @Override
+                public boolean shouldHeadsUpBeVisible() {
+                    return mHeadsUpAppearanceController.shouldBeVisible();
+                }
+            };
+
     /**
      * Reconfigures the shade to show the AOD UI (clock, smartspace, etc). This is called by the
      * screen off animation controller in order to animate in AOD without "actually" fully switching

packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardStatusBarViewControllerTest.java

@@ -86,15 +86,14 @@ public class KeyguardStatusBarViewControllerTest extends SysuiTestCase {
     @Mock
     private SysuiStatusBarStateController mStatusBarStateController;
 
+    private TestNotificationPanelViewStateProvider mNotificationPanelViewStateProvider;
     private KeyguardStatusBarView mKeyguardStatusBarView;
     private KeyguardStatusBarViewController mController;
 
-    private float mAlpha = 0.5f;
-    private final KeyguardStatusBarViewController.ViewStateProvider mViewStateProvider =
-            () -> new KeyguardStatusBarViewController.ViewState(mAlpha);
-
     @Before
     public void setup() throws Exception {
+        mNotificationPanelViewStateProvider = new TestNotificationPanelViewStateProvider();
+
         MockitoAnnotations.initMocks(this);
 
         allowTestableLooperAsMainThread();
@@ -114,7 +113,7 @@ public class KeyguardStatusBarViewControllerTest extends SysuiTestCase {
                 mStatusBarIconController,
                 new StatusBarIconController.TintedIconManager.Factory(mFeatureFlags),
                 mBatteryMeterViewController,
-                mViewStateProvider,
+                mNotificationPanelViewStateProvider,
                 mKeyguardStateController,
                 mKeyguardBypassController,
                 mKeyguardUpdateMonitor,
@@ -210,7 +209,6 @@ public class KeyguardStatusBarViewControllerTest extends SysuiTestCase {
 
     @Test
     public void updateViewState_notKeyguardState_nothingUpdated() {
-        mAlpha = 0.255f;
         mController.onViewAttached();
         updateStateToNotKeyguard();
 
@@ -264,8 +262,59 @@ public class KeyguardStatusBarViewControllerTest extends SysuiTestCase {
         assertThat(mKeyguardStatusBarView.getVisibility()).isEqualTo(View.VISIBLE);
     }
 
+    @Test
+    public void updateViewState_panelExpandedHeightZero_viewHidden() {
+        mController.onViewAttached();
+        updateStateToKeyguard();
+
+        mNotificationPanelViewStateProvider.setPanelViewExpandedHeight(0);
+
+        mController.updateViewState();
+
+        assertThat(mKeyguardStatusBarView.getVisibility()).isEqualTo(View.INVISIBLE);
+    }
+
+    @Test
+    public void updateViewState_qsExpansionOne_viewHidden() {
+        mController.onViewAttached();
+        updateStateToKeyguard();
+
+        mNotificationPanelViewStateProvider.setQsExpansionFraction(1f);
+
+        mController.updateViewState();
+
+        assertThat(mKeyguardStatusBarView.getVisibility()).isEqualTo(View.INVISIBLE);
+    }
+
     // TODO(b/195442899): Add more tests for #updateViewState once CLs are finalized.
 
+    @Test
+    public void updateForHeadsUp_headsUpShouldBeVisible_viewHidden() {
+        mController.onViewAttached();
+        updateStateToKeyguard();
+        mKeyguardStatusBarView.setVisibility(View.VISIBLE);
+
+        mNotificationPanelViewStateProvider.setShouldHeadsUpBeVisible(true);
+        mController.updateForHeadsUp(/* animate= */ false);
+
+        assertThat(mKeyguardStatusBarView.getVisibility()).isEqualTo(View.INVISIBLE);
+    }
+
+    @Test
+    public void updateForHeadsUp_headsUpShouldNotBeVisible_viewShown() {
+        mController.onViewAttached();
+        updateStateToKeyguard();
+
+        // Start with the opposite state.
+        mNotificationPanelViewStateProvider.setShouldHeadsUpBeVisible(true);
+        mController.updateForHeadsUp(/* animate= */ false);
+
+        mNotificationPanelViewStateProvider.setShouldHeadsUpBeVisible(false);
+        mController.updateForHeadsUp(/* animate= */ false);
+
+        assertThat(mKeyguardStatusBarView.getVisibility()).isEqualTo(View.VISIBLE);
+    }
+
     private void updateStateToNotKeyguard() {
         updateStatusBarState(SHADE);
     }
@@ -295,4 +344,41 @@ public class KeyguardStatusBarViewControllerTest extends SysuiTestCase {
 
         callback.onFinishedGoingToSleep(0);
     }
+
+    private static class TestNotificationPanelViewStateProvider
+            implements NotificationPanelViewController.NotificationPanelViewStateProvider {
+
+        TestNotificationPanelViewStateProvider() {}
+
+        private float mPanelViewExpandedHeight = 100f;
+        private float mQsExpansionFraction = 0f;
+        private boolean mShouldHeadsUpBeVisible = false;
+
+        @Override
+        public float getPanelViewExpandedHeight() {
+            return mPanelViewExpandedHeight;
+        }
+
+        @Override
+        public float getQsExpansionFraction() {
+            return mQsExpansionFraction;
+        }
+
+        @Override
+        public boolean shouldHeadsUpBeVisible() {
+            return mShouldHeadsUpBeVisible;
+        }
+
+        public void setPanelViewExpandedHeight(float panelViewExpandedHeight) {
+            this.mPanelViewExpandedHeight = panelViewExpandedHeight;
+        }
+
+        public void setQsExpansionFraction(float qsExpansionFraction) {
+            this.mQsExpansionFraction = qsExpansionFraction;
+        }
+
+        public void setShouldHeadsUpBeVisible(boolean shouldHeadsUpBeVisible) {
+            this.mShouldHeadsUpBeVisible = shouldHeadsUpBeVisible;
+        }
+    }
 }