Initial changes to break out AllApps into its own view.

- Moves launcher state-transition code into its own class
- Moves all-apps related code into a separate view/set of classes
- Implements a basic list view for all apps

Change-Id: I68f174aa9e1bf82c4e46ce9549c78a8dc4623f46

1 files changed, 832 insertions, 0 deletions

diff --git a/src/com/android/launcher3/LauncherStateTransitionAnimation.java b/src/com/android/launcher3/LauncherStateTransitionAnimation.java
new file mode 100644
index 000000000..484ed5c30
--- /dev/null
+++ b/src/com/android/launcher3/LauncherStateTransitionAnimation.java
@@ -0,0 +1,832 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
+import android.animation.PropertyValuesHolder;
+import android.animation.TimeInterpolator;
+import android.content.res.Resources;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewAnimationUtils;
+import android.view.animation.AccelerateInterpolator;
+import android.view.animation.DecelerateInterpolator;
+
+import java.util.HashMap;
+
+/**
+ * TODO: figure out what kind of tests we can write for this
+ *
+ * Things to test when changing the following class.
+ *   - Home from workspace
+ *          - from center screen
+ *          - from other screens
+ *   - Home from all apps
+ *          - from center screen
+ *          - from other screens
+ *   - Back from all apps
+ *          - from center screen
+ *          - from other screens
+ *   - Launch app from workspace and quit
+ *          - with back
+ *          - with home
+ *   - Launch app from all apps and quit
+ *          - with back
+ *          - with home
+ *   - Go to a screen that's not the default, then all
+ *     apps, and launch and app, and go back
+ *          - with back
+ *          -with home
+ *   - On workspace, long press power and go back
+ *          - with back
+ *          - with home
+ *   - On all apps, long press power and go back
+ *          - with back
+ *          - with home
+ *   - On workspace, power off
+ *   - On all apps, power off
+ *   - Launch an app and turn off the screen while in that app
+ *          - Go back with home key
+ *          - Go back with back key  TODO: make this not go to workspace
+ *          - From all apps
+ *          - From workspace
+ *   - Enter and exit car mode (becuase it causes an extra configuration changed)
+ *          - From all apps
+ *          - From the center workspace
+ *          - From another workspace
+ */
+public class LauncherStateTransitionAnimation {
+
+    /**
+     * Callbacks made during the state transition
+     */
+    interface Callbacks {
+        public void onStateTransitionHideSearchBar();
+    }
+
+    /**
+     * Private callbacks made during transition setup.
+     */
+    static abstract class PrivateTransitionCallbacks {
+        void onRevealViewVisible(View revealView, View contentView, View allAppsButtonView) {}
+        void onAnimationComplete(View revealView, View contentView, View allAppsButtonView) {}
+        float getMaterialRevealViewFinalAlpha(View revealView) {
+            return 0;
+        }
+        float getMaterialRevealViewFinalXDrift(View revealView) {
+            return 0;
+        }
+        float getMaterialRevealViewFinalYDrift(View revealView) {
+            return 0;
+        }
+        float getMaterialRevealViewStartFinalRadius() {
+            return 0;
+        }
+        AnimatorListenerAdapter getMaterialRevealViewAnimatorListener(View revealView,
+                View allAppsButtonView) {
+            return null;
+        }
+    }
+
+    public static final String TAG = "LauncherStateTransitionAnimation";
+
+    // Flags to determine how to set the layers on views before the transition animation
+    public static final int BUILD_LAYER = 0;
+    public static final int BUILD_AND_SET_LAYER = 1;
+    public static final int SINGLE_FRAME_DELAY = 16;
+
+    private Launcher mLauncher;
+    private Callbacks mCb;
+    private AnimatorSet mStateAnimation;
+
+    public LauncherStateTransitionAnimation(Launcher l, Callbacks cb) {
+        mLauncher = l;
+        mCb = cb;
+    }
+
+    /**
+     * Starts an animation to the apps view.
+     */
+    public void startAnimationToAllApps(final boolean animated) {
+        final AppsContainerView toView = mLauncher.getAppsView();
+        PrivateTransitionCallbacks cb = new PrivateTransitionCallbacks() {
+            private int[] mAllAppsToPanelDelta;
+
+            @Override
+            public void onRevealViewVisible(View revealView, View contentView,
+                    View allAppsButtonView) {
+                toView.setBackground(null);
+                // Get the y delta between the center of the page and the center of the all apps
+                // button
+                mAllAppsToPanelDelta = Utilities.getCenterDeltaInScreenSpace(revealView,
+                        allAppsButtonView, null);
+            }
+            @Override
+            public float getMaterialRevealViewFinalAlpha(View revealView) {
+                return 1f;
+            }
+            @Override
+            public float getMaterialRevealViewFinalXDrift(View revealView) {
+                return mAllAppsToPanelDelta[0];
+            }
+            @Override
+            public float getMaterialRevealViewFinalYDrift(View revealView) {
+                return mAllAppsToPanelDelta[1];
+            }
+            @Override
+            public float getMaterialRevealViewStartFinalRadius() {
+                int allAppsButtonSize = LauncherAppState.getInstance().
+                        getDynamicGrid().getDeviceProfile().allAppsButtonVisualSize;
+                return allAppsButtonSize / 2;
+            }
+            @Override
+            public AnimatorListenerAdapter getMaterialRevealViewAnimatorListener(
+                    final View revealView, final View allAppsButtonView) {
+                return new AnimatorListenerAdapter() {
+                    public void onAnimationStart(Animator animation) {
+                        allAppsButtonView.setVisibility(View.INVISIBLE);
+                    }
+                    public void onAnimationEnd(Animator animation) {
+                        allAppsButtonView.setVisibility(View.VISIBLE);
+                    }
+                };
+            }
+        };
+        startAnimationToOverlay(Workspace.State.NORMAL_HIDDEN, toView, toView.getContentView(),
+                toView.getRevealView(), null, animated, cb);
+    }
+
+    /**
+     * Starts an animation to the widgets view.
+     */
+    public void startAnimationToWidgets(final boolean animated) {
+        final AppsCustomizeTabHost toView = mLauncher.getWidgetsView();
+        PrivateTransitionCallbacks cb = new PrivateTransitionCallbacks() {
+            @Override
+            public void onRevealViewVisible(View revealView, View contentView,
+                    View allAppsButtonView) {
+                // Hide the real page background, and swap in the fake one
+                ((AppsCustomizePagedView) contentView).setPageBackgroundsVisible(false);
+                revealView.setBackground(mLauncher.getDrawable(R.drawable.quantum_panel_dark));
+            }
+            @Override
+            public void onAnimationComplete(View revealView, View contentView, View allAppsButtonView) {
+                // Show the real page background
+                ((AppsCustomizePagedView) contentView).setPageBackgroundsVisible(true);
+            }
+            @Override
+            public float getMaterialRevealViewFinalAlpha(View revealView) {
+                return 0.3f;
+            }
+            @Override
+            public float getMaterialRevealViewFinalYDrift(View revealView) {
+                return revealView.getMeasuredHeight() / 2;
+            }
+        };
+        startAnimationToOverlay(Workspace.State.OVERVIEW_HIDDEN, toView, toView.getContentView(),
+                toView.getRevealView(), toView.getPageIndicators(), animated, cb);
+    }
+
+    /**
+     * Starts and animation to the workspace from the current overlay view.
+     */
+    public void startAnimationToWorkspace(final Launcher.State fromState,
+              final Workspace.State toWorkspaceState, final boolean animated,
+              final Runnable onCompleteRunnable) {
+        if (toWorkspaceState != Workspace.State.NORMAL &&
+                toWorkspaceState != Workspace.State.SPRING_LOADED &&
+                toWorkspaceState != Workspace.State.OVERVIEW) {
+            Log.e(TAG, "Unexpected call to startAnimationToWorkspace");
+        }
+
+        if (fromState == Launcher.State.APPS || fromState == Launcher.State.APPS_SPRING_LOADED) {
+            startAnimationToWorkspaceFromAllApps(fromState, toWorkspaceState, animated,
+                    onCompleteRunnable);
+        } else {
+            startAnimationToWorkspaceFromWidgets(fromState, toWorkspaceState, animated,
+                    onCompleteRunnable);
+        }
+    }
+
+    /**
+     * Creates and starts a new animation to a particular overlay view.
+     */
+    private void startAnimationToOverlay(final Workspace.State toWorkspaceState, final View toView,
+             final View contentView, final View revealView, final View pageIndicatorsView,
+             final boolean animated, final PrivateTransitionCallbacks pCb) {
+        final Resources res = mLauncher.getResources();
+        final boolean material = Utilities.isLmpOrAbove();
+        final int revealDuration = res.getInteger(R.integer.config_appsCustomizeRevealTime);
+        final int itemsAlphaStagger =
+                res.getInteger(R.integer.config_appsCustomizeItemsAlphaStagger);
+
+        final View allAppsButtonView = mLauncher.getAllAppsButton();
+        final View fromView = mLauncher.getWorkspace();
+
+        final HashMap<View, Integer> layerViews = new HashMap<>();
+
+        // If for some reason our views aren't initialized, don't animate
+        boolean initialized = allAppsButtonView != null;
+
+        // Cancel the current animation
+        cancelAnimation();
+
+        // Create the workspace animation.
+        // NOTE: this call apparently also sets the state for the workspace if !animated
+        Animator workspaceAnim = mLauncher.getWorkspace().getChangeStateAnimation(
+                toWorkspaceState, animated, layerViews);
+
+        if (animated && initialized) {
+            mStateAnimation = LauncherAnimUtils.createAnimatorSet();
+
+            // Setup the reveal view animation
+            int width = revealView.getMeasuredWidth();
+            int height = revealView.getMeasuredHeight();
+            float revealRadius = (float) Math.sqrt((width * width) / 4 + (height * height) / 4);
+            revealView.setVisibility(View.VISIBLE);
+            revealView.setAlpha(0f);
+            revealView.setTranslationY(0f);
+            revealView.setTranslationX(0f);
+            pCb.onRevealViewVisible(revealView, contentView, allAppsButtonView);
+
+            // Calculate the final animation values
+            final float revealViewToAlpha;
+            final float revealViewToXDrift;
+            final float revealViewToYDrift;
+            if (material) {
+                revealViewToAlpha = pCb.getMaterialRevealViewFinalAlpha(revealView);
+                revealViewToYDrift = pCb.getMaterialRevealViewFinalYDrift(revealView);
+                revealViewToXDrift = pCb.getMaterialRevealViewFinalXDrift(revealView);
+            } else {
+                revealViewToAlpha = 0f;
+                revealViewToYDrift = 2 * height / 3;
+                revealViewToXDrift = 0;
+            }
+
+            // Create the animators
+            PropertyValuesHolder panelAlpha =
+                    PropertyValuesHolder.ofFloat("alpha", revealViewToAlpha, 1f);
+            PropertyValuesHolder panelDriftY =
+                    PropertyValuesHolder.ofFloat("translationY", revealViewToYDrift, 0);
+            PropertyValuesHolder panelDriftX =
+                    PropertyValuesHolder.ofFloat("translationX", revealViewToXDrift, 0);
+            ObjectAnimator panelAlphaAndDrift = ObjectAnimator.ofPropertyValuesHolder(revealView,
+                    panelAlpha, panelDriftY, panelDriftX);
+            panelAlphaAndDrift.setDuration(revealDuration);
+            panelAlphaAndDrift.setInterpolator(new LogDecelerateInterpolator(100, 0));
+
+            // Play the animation
+            layerViews.put(revealView, BUILD_AND_SET_LAYER);
+            mStateAnimation.play(panelAlphaAndDrift);
+
+            // Setup the animation for the page indicators
+            if (pageIndicatorsView != null) {
+                pageIndicatorsView.setAlpha(0.01f);
+                ObjectAnimator indicatorsAlpha =
+                        ObjectAnimator.ofFloat(pageIndicatorsView, "alpha", 1f);
+                indicatorsAlpha.setDuration(revealDuration);
+                mStateAnimation.play(indicatorsAlpha);
+            }
+
+            // Setup the animation for the content view
+            contentView.setVisibility(View.VISIBLE);
+            contentView.setAlpha(0f);
+            contentView.setTranslationY(revealViewToYDrift);
+            layerViews.put(contentView, BUILD_AND_SET_LAYER);
+
+            // Create the individual animators
+            ObjectAnimator pageDrift = ObjectAnimator.ofFloat(contentView, "translationY",
+                    revealViewToYDrift, 0);
+            pageDrift.setDuration(revealDuration);
+            pageDrift.setInterpolator(new LogDecelerateInterpolator(100, 0));
+            pageDrift.setStartDelay(itemsAlphaStagger);
+            mStateAnimation.play(pageDrift);
+
+            ObjectAnimator itemsAlpha = ObjectAnimator.ofFloat(contentView, "alpha", 0f, 1f);
+            itemsAlpha.setDuration(revealDuration);
+            itemsAlpha.setInterpolator(new AccelerateInterpolator(1.5f));
+            itemsAlpha.setStartDelay(itemsAlphaStagger);
+            mStateAnimation.play(itemsAlpha);
+
+            if (material) {
+                // Animate the all apps button
+                float startRadius = pCb.getMaterialRevealViewStartFinalRadius();
+                AnimatorListenerAdapter listener = pCb.getMaterialRevealViewAnimatorListener(
+                        revealView, allAppsButtonView);
+                Animator reveal = ViewAnimationUtils.createCircularReveal(revealView, width / 2,
+                        height / 2, startRadius, revealRadius);
+                reveal.setDuration(revealDuration);
+                reveal.setInterpolator(new LogDecelerateInterpolator(100, 0));
+                if (listener != null) {
+                    reveal.addListener(listener);
+                }
+                mStateAnimation.play(reveal);
+            }
+
+            mStateAnimation.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    dispatchOnLauncherTransitionEnd(fromView, animated, false);
+                    dispatchOnLauncherTransitionEnd(toView, animated, false);
+
+                    // Hide the reveal view
+                    revealView.setVisibility(View.INVISIBLE);
+                    pCb.onAnimationComplete(revealView, contentView, allAppsButtonView);
+
+                    // Disable all necessary layers
+                    for (View v : layerViews.keySet()) {
+                        if (layerViews.get(v) == BUILD_AND_SET_LAYER) {
+                            v.setLayerType(View.LAYER_TYPE_NONE, null);
+                        }
+                    }
+
+                    // Hide the search bar
+                    mCb.onStateTransitionHideSearchBar();
+
+                    // This can hold unnecessary references to views.
+                    mStateAnimation = null;
+                }
+
+            });
+
+            // Play the workspace animation
+            if (workspaceAnim != null) {
+                mStateAnimation.play(workspaceAnim);
+            }
+
+            // Dispatch the prepare transition signal
+            dispatchOnLauncherTransitionPrepare(fromView, animated, false);
+            dispatchOnLauncherTransitionPrepare(toView, animated, false);
+
+
+            final AnimatorSet stateAnimation = mStateAnimation;
+            final Runnable startAnimRunnable = new Runnable() {
+                public void run() {
+                    // Check that mStateAnimation hasn't changed while
+                    // we waited for a layout/draw pass
+                    if (mStateAnimation != stateAnimation)
+                        return;
+                    dispatchOnLauncherTransitionStart(fromView, animated, false);
+                    dispatchOnLauncherTransitionStart(toView, animated, false);
+
+                    // Enable all necessary layers
+                    for (View v : layerViews.keySet()) {
+                        if (layerViews.get(v) == BUILD_AND_SET_LAYER) {
+                            v.setLayerType(View.LAYER_TYPE_HARDWARE, null);
+                        }
+                        if (Utilities.isViewAttachedToWindow(v)) {
+                            v.buildLayer();
+                        }
+                    }
+
+                    // Focus the new view
+                    toView.requestFocus();
+
+                    mStateAnimation.start();
+                }
+            };
+
+            toView.bringToFront();
+            toView.setVisibility(View.VISIBLE);
+            toView.post(startAnimRunnable);
+        } else {
+            toView.setTranslationX(0.0f);
+            toView.setTranslationY(0.0f);
+            toView.setScaleX(1.0f);
+            toView.setScaleY(1.0f);
+            toView.setVisibility(View.VISIBLE);
+            toView.bringToFront();
+
+            // Show the content view
+            contentView.setVisibility(View.VISIBLE);
+
+            // Hide the search bar
+            mCb.onStateTransitionHideSearchBar();
+
+            dispatchOnLauncherTransitionPrepare(fromView, animated, false);
+            dispatchOnLauncherTransitionStart(fromView, animated, false);
+            dispatchOnLauncherTransitionEnd(fromView, animated, false);
+            dispatchOnLauncherTransitionPrepare(toView, animated, false);
+            dispatchOnLauncherTransitionStart(toView, animated, false);
+            dispatchOnLauncherTransitionEnd(toView, animated, false);
+        }
+    }
+
+    /**
+     * Starts and animation to the workspace from the apps view.
+     */
+    private void startAnimationToWorkspaceFromAllApps(final Launcher.State fromState,
+              final Workspace.State toWorkspaceState, final boolean animated,
+              final Runnable onCompleteRunnable) {
+        AppsContainerView appsView = mLauncher.getAppsView();
+        PrivateTransitionCallbacks cb = new PrivateTransitionCallbacks() {
+            int[] mAllAppsToPanelDelta;
+
+            @Override
+            public void onRevealViewVisible(View revealView, View contentView,
+                                            View allAppsButtonView) {
+                // Get the y delta between the center of the page and the center of the all apps
+                // button
+                mAllAppsToPanelDelta = Utilities.getCenterDeltaInScreenSpace(revealView,
+                        allAppsButtonView, null);
+            }
+            @Override
+            public float getMaterialRevealViewFinalXDrift(View revealView) {
+                return mAllAppsToPanelDelta[0];
+            }
+            @Override
+            public float getMaterialRevealViewFinalYDrift(View revealView) {
+                return mAllAppsToPanelDelta[1];
+            }
+            @Override
+            float getMaterialRevealViewFinalAlpha(View revealView) {
+                // No alpha anim from all apps
+                return 1f;
+            }
+            @Override
+            float getMaterialRevealViewStartFinalRadius() {
+                int allAppsButtonSize = LauncherAppState.getInstance().
+                        getDynamicGrid().getDeviceProfile().allAppsButtonVisualSize;
+                return allAppsButtonSize / 2;
+            }
+            @Override
+            public AnimatorListenerAdapter getMaterialRevealViewAnimatorListener(
+                    final View revealView, final View allAppsButtonView) {
+                return new AnimatorListenerAdapter() {
+                    public void onAnimationStart(Animator animation) {
+                        // We set the alpha instead of visibility to ensure that the focus does not
+                        // get taken from the all apps view
+                        allAppsButtonView.setVisibility(View.VISIBLE);
+                        allAppsButtonView.setAlpha(0f);
+                    }
+                    public void onAnimationEnd(Animator animation) {
+                        // Hide the reveal view
+                        revealView.setVisibility(View.INVISIBLE);
+
+                        // Show the all apps button, and focus it
+                        allAppsButtonView.setAlpha(1f);
+                    }
+                };
+            }
+        };
+        startAnimationToWorkspaceFromOverlay(toWorkspaceState, appsView, appsView.getContentView(),
+                appsView.getRevealView(), null /* pageIndicatorsView */, animated,
+                onCompleteRunnable, cb);
+    }
+
+    /**
+     * Starts and animation to the workspace from the widgets view.
+     */
+    private void startAnimationToWorkspaceFromWidgets(final Launcher.State fromState,
+              final Workspace.State toWorkspaceState, final boolean animated,
+              final Runnable onCompleteRunnable) {
+        AppsCustomizeTabHost widgetsView = mLauncher.getWidgetsView();
+        PrivateTransitionCallbacks cb = new PrivateTransitionCallbacks() {
+            @Override
+            public void onRevealViewVisible(View revealView, View contentView, View allAppsButtonView) {
+                AppsCustomizePagedView pagedView = ((AppsCustomizePagedView) contentView);
+
+                // Hide the real page background, and swap in the fake one
+                pagedView.stopScrolling();
+                pagedView.setPageBackgroundsVisible(false);
+                revealView.setBackground(mLauncher.getDrawable(R.drawable.quantum_panel_dark));
+
+                // Hide the side pages of the Widget tray to avoid some ugly edge cases
+                final View currentPage = pagedView.getPageAt(pagedView.getNextPage());
+                int count = pagedView.getChildCount();
+                for (int i = 0; i < count; i++) {
+                    View child = pagedView.getChildAt(i);
+                    if (child != currentPage) {
+                        child.setVisibility(View.INVISIBLE);
+                    }
+                }
+            }
+            @Override
+            public void onAnimationComplete(View revealView, View contentView, View allAppsButtonView) {
+                AppsCustomizePagedView pagedView = ((AppsCustomizePagedView) contentView);
+
+                // Show the real page background and force-update the page
+                pagedView.setPageBackgroundsVisible(true);
+                pagedView.setCurrentPage(pagedView.getNextPage());
+                pagedView.updateCurrentPageScroll();
+
+                // Unhide the side pages
+                int count = pagedView.getChildCount();
+                for (int i = 0; i < count; i++) {
+                    View child = pagedView.getChildAt(i);
+                    child.setVisibility(View.VISIBLE);
+                }
+            }
+            @Override
+            public float getMaterialRevealViewFinalYDrift(View revealView) {
+                return revealView.getMeasuredHeight() / 2;
+            }
+            @Override
+            float getMaterialRevealViewFinalAlpha(View revealView) {
+                return 0.4f;
+            }
+            @Override
+            public AnimatorListenerAdapter getMaterialRevealViewAnimatorListener(
+                    final View revealView, final View allAppsButtonView) {
+                return new AnimatorListenerAdapter() {
+                    public void onAnimationEnd(Animator animation) {
+                        // Hide the reveal view
+                        revealView.setVisibility(View.INVISIBLE);
+                    }
+                };
+            }
+        };
+        startAnimationToWorkspaceFromOverlay(toWorkspaceState, widgetsView,
+                widgetsView.getContentView(), widgetsView.getRevealView(),
+                widgetsView.getPageIndicators(), animated, onCompleteRunnable, cb);
+    }
+
+    /**
+     * Creates and starts a new animation to the workspace.
+     */
+    private void startAnimationToWorkspaceFromOverlay(final Workspace.State toWorkspaceState,
+              final View fromView, final View contentView, final View revealView,
+              final View pageIndicatorsView, final boolean animated,
+              final Runnable onCompleteRunnable, final PrivateTransitionCallbacks pCb) {
+        final Resources res = mLauncher.getResources();
+        final boolean material = Utilities.isLmpOrAbove();
+        final int revealDuration = res.getInteger(R.integer.config_appsCustomizeRevealTime);
+        final int itemsAlphaStagger =
+                res.getInteger(R.integer.config_appsCustomizeItemsAlphaStagger);
+
+        final View allAppsButtonView = mLauncher.getAllAppsButton();
+        final View toView = mLauncher.getWorkspace();
+
+        final HashMap<View, Integer> layerViews = new HashMap<>();
+
+        // If for some reason our views aren't initialized, don't animate
+        boolean initialized = allAppsButtonView != null;
+
+        // Cancel the current animation
+        cancelAnimation();
+
+        // Create the workspace animation.
+        // NOTE: this call apparently also sets the state for the workspace if !animated
+        Animator workspaceAnim = mLauncher.getWorkspace().getChangeStateAnimation(
+                toWorkspaceState, animated, layerViews);
+
+        if (animated && initialized) {
+            mStateAnimation = LauncherAnimUtils.createAnimatorSet();
+
+            // Play the workspace animation
+            if (workspaceAnim != null) {
+                mStateAnimation.play(workspaceAnim);
+            }
+
+            // hideAppsCustomizeHelper is called in some cases when it is already hidden
+            // don't perform all these no-op animations. In particularly, this was causing
+            // the all-apps button to pop in and out.
+            if (fromView.getVisibility() == View.VISIBLE) {
+                int width = revealView.getMeasuredWidth();
+                int height = revealView.getMeasuredHeight();
+                float revealRadius = (float) Math.sqrt((width * width) / 4 + (height * height) / 4);
+                revealView.setVisibility(View.VISIBLE);
+                revealView.setAlpha(1f);
+                revealView.setTranslationY(0);
+                layerViews.put(revealView, BUILD_AND_SET_LAYER);
+                pCb.onRevealViewVisible(revealView, contentView, allAppsButtonView);
+
+                // Calculate the final animation values
+                final float revealViewToXDrift;
+                final float revealViewToYDrift;
+                if (material) {
+                    revealViewToYDrift = pCb.getMaterialRevealViewFinalYDrift(revealView);
+                    revealViewToXDrift = pCb.getMaterialRevealViewFinalXDrift(revealView);
+                } else {
+                    revealViewToYDrift = 2 * height / 3;
+                    revealViewToXDrift = 0;
+                }
+
+                // The vertical motion of the apps panel should be delayed by one frame
+                // from the conceal animation in order to give the right feel. We correspondingly
+                // shorten the duration so that the slide and conceal end at the same time.
+                TimeInterpolator decelerateInterpolator = material ?
+                        new LogDecelerateInterpolator(100, 0) :
+                        new DecelerateInterpolator(1f);
+                ObjectAnimator panelDriftY = LauncherAnimUtils.ofFloat(revealView, "translationY",
+                        0, revealViewToYDrift);
+                panelDriftY.setDuration(revealDuration - SINGLE_FRAME_DELAY);
+                panelDriftY.setStartDelay(itemsAlphaStagger + SINGLE_FRAME_DELAY);
+                panelDriftY.setInterpolator(decelerateInterpolator);
+                mStateAnimation.play(panelDriftY);
+
+                ObjectAnimator panelDriftX = LauncherAnimUtils.ofFloat(revealView, "translationX",
+                        0, revealViewToXDrift);
+                panelDriftX.setDuration(revealDuration - SINGLE_FRAME_DELAY);
+                panelDriftX.setStartDelay(itemsAlphaStagger + SINGLE_FRAME_DELAY);
+                panelDriftX.setInterpolator(decelerateInterpolator);
+                mStateAnimation.play(panelDriftX);
+
+                // Setup animation for the reveal panel alpha
+                final float revealViewToAlpha = !material ? 0f :
+                        pCb.getMaterialRevealViewFinalAlpha(revealView);
+                if (revealViewToAlpha != 1f) {
+                    ObjectAnimator panelAlpha = LauncherAnimUtils.ofFloat(revealView, "alpha",
+                            1f, revealViewToAlpha);
+                    panelAlpha.setDuration(material ? revealDuration : 150);
+                    panelAlpha.setStartDelay(material ? 0 : itemsAlphaStagger + SINGLE_FRAME_DELAY);
+                    panelAlpha.setInterpolator(decelerateInterpolator);
+                    mStateAnimation.play(panelAlpha);
+                }
+
+                // Setup the animation for the content view
+                layerViews.put(contentView, BUILD_AND_SET_LAYER);
+
+                // Create the individual animators
+                ObjectAnimator pageDrift = LauncherAnimUtils.ofFloat(contentView, "translationY",
+                        0, revealViewToYDrift);
+                contentView.setTranslationY(0);
+                pageDrift.setDuration(revealDuration - SINGLE_FRAME_DELAY);
+                pageDrift.setInterpolator(decelerateInterpolator);
+                pageDrift.setStartDelay(itemsAlphaStagger + SINGLE_FRAME_DELAY);
+                mStateAnimation.play(pageDrift);
+
+                contentView.setAlpha(1f);
+                ObjectAnimator itemsAlpha = LauncherAnimUtils.ofFloat(contentView, "alpha", 1f, 0f);
+                itemsAlpha.setDuration(100);
+                itemsAlpha.setInterpolator(decelerateInterpolator);
+                mStateAnimation.play(itemsAlpha);
+
+                // Setup the page indicators animation
+                if (pageIndicatorsView != null) {
+                    pageIndicatorsView.setAlpha(1f);
+                    ObjectAnimator indicatorsAlpha =
+                            LauncherAnimUtils.ofFloat(pageIndicatorsView, "alpha", 0f);
+                    indicatorsAlpha.setDuration(revealDuration);
+                    indicatorsAlpha.setInterpolator(new DecelerateInterpolator(1.5f));
+                    mStateAnimation.play(indicatorsAlpha);
+                }
+
+                if (material) {
+                    // Animate the all apps button
+                    float finalRadius = pCb.getMaterialRevealViewStartFinalRadius();
+                    AnimatorListenerAdapter listener =
+                            pCb.getMaterialRevealViewAnimatorListener(revealView, allAppsButtonView);
+                    Animator reveal =
+                            LauncherAnimUtils.createCircularReveal(revealView, width / 2,
+                                    height / 2, revealRadius, finalRadius);
+                    reveal.setInterpolator(new LogDecelerateInterpolator(100, 0));
+                    reveal.setDuration(revealDuration);
+                    reveal.setStartDelay(itemsAlphaStagger);
+                    if (listener != null) {
+                        reveal.addListener(listener);
+                    }
+                    mStateAnimation.play(reveal);
+                }
+
+                dispatchOnLauncherTransitionPrepare(fromView, animated, true);
+                dispatchOnLauncherTransitionPrepare(toView, animated, true);
+            }
+
+            mStateAnimation.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    fromView.setVisibility(View.GONE);
+                    dispatchOnLauncherTransitionEnd(fromView, animated, true);
+                    dispatchOnLauncherTransitionEnd(toView, animated, true);
+
+                    // Run any queued runnables
+                    if (onCompleteRunnable != null) {
+                        onCompleteRunnable.run();
+                    }
+
+                    // Animation complete callback
+                    pCb.onAnimationComplete(revealView, contentView, allAppsButtonView);
+
+                    // Disable all necessary layers
+                    for (View v : layerViews.keySet()) {
+                        if (layerViews.get(v) == BUILD_AND_SET_LAYER) {
+                            v.setLayerType(View.LAYER_TYPE_NONE, null);
+                        }
+                    }
+
+                    // Reset page transforms
+                    if (contentView != null) {
+                        contentView.setTranslationX(0);
+                        contentView.setTranslationY(0);
+                        contentView.setAlpha(1);
+                    }
+
+                    // This can hold unnecessary references to views.
+                    mStateAnimation = null;
+                }
+            });
+
+            final AnimatorSet stateAnimation = mStateAnimation;
+            final Runnable startAnimRunnable = new Runnable() {
+                public void run() {
+                    // Check that mStateAnimation hasn't changed while
+                    // we waited for a layout/draw pass
+                    if (mStateAnimation != stateAnimation)
+                        return;
+                    dispatchOnLauncherTransitionStart(fromView, animated, false);
+                    dispatchOnLauncherTransitionStart(toView, animated, false);
+
+                    // Enable all necessary layers
+                    for (View v : layerViews.keySet()) {
+                        if (layerViews.get(v) == BUILD_AND_SET_LAYER) {
+                            v.setLayerType(View.LAYER_TYPE_HARDWARE, null);
+                        }
+                        if (Utilities.isLmpOrAbove()) {
+                            v.buildLayer();
+                        }
+                    }
+                    mStateAnimation.start();
+                }
+            };
+            fromView.post(startAnimRunnable);
+        } else {
+            fromView.setVisibility(View.GONE);
+            dispatchOnLauncherTransitionPrepare(fromView, animated, true);
+            dispatchOnLauncherTransitionStart(fromView, animated, true);
+            dispatchOnLauncherTransitionEnd(fromView, animated, true);
+            dispatchOnLauncherTransitionPrepare(toView, animated, true);
+            dispatchOnLauncherTransitionStart(toView, animated, true);
+            dispatchOnLauncherTransitionEnd(toView, animated, true);
+
+            // Run any queued runnables
+            if (onCompleteRunnable != null) {
+                onCompleteRunnable.run();
+            }
+        }
+    }
+
+
+    /**
+     * Dispatches the prepare-transition event to suitable views.
+     */
+    void dispatchOnLauncherTransitionPrepare(View v, boolean animated, boolean toWorkspace) {
+        if (v instanceof LauncherTransitionable) {
+            ((LauncherTransitionable) v).onLauncherTransitionPrepare(mLauncher, animated,
+                    toWorkspace);
+        }
+    }
+
+    /**
+     * Dispatches the start-transition event to suitable views.
+     */
+    void dispatchOnLauncherTransitionStart(View v, boolean animated, boolean toWorkspace) {
+        if (v instanceof LauncherTransitionable) {
+            ((LauncherTransitionable) v).onLauncherTransitionStart(mLauncher, animated,
+                    toWorkspace);
+        }
+
+        // Update the workspace transition step as well
+        dispatchOnLauncherTransitionStep(v, 0f);
+    }
+
+    /**
+     * Dispatches the step-transition event to suitable views.
+     */
+    void dispatchOnLauncherTransitionStep(View v, float t) {
+        if (v instanceof LauncherTransitionable) {
+            ((LauncherTransitionable) v).onLauncherTransitionStep(mLauncher, t);
+        }
+    }
+
+    /**
+     * Dispatches the end-transition event to suitable views.
+     */
+    void dispatchOnLauncherTransitionEnd(View v, boolean animated, boolean toWorkspace) {
+        if (v instanceof LauncherTransitionable) {
+            ((LauncherTransitionable) v).onLauncherTransitionEnd(mLauncher, animated,
+                    toWorkspace);
+        }
+
+        // Update the workspace transition step as well
+        dispatchOnLauncherTransitionStep(v, 1f);
+    }
+
+    /**
+     * Cancels the current animation.
+     */
+    private void cancelAnimation() {
+        if (mStateAnimation != null) {
+            mStateAnimation.setDuration(0);
+            mStateAnimation.cancel();
+            mStateAnimation = null;
+        }
+    }
+}
\ No newline at end of file