startAnimationToWorkspace() handles coming from another workspace state.

Previously, it assumed that the transition started from an overlay -
either all apps or the widget picker. But this isn't true, because
the transition is also used when transitioning between workspace
states such as from normal to overview. Properly handling this case is
critical for the workspace to correctly manage the transition. For
instance, it wasn't setting mIsSwitchingState to true, causing issues
such as invisible overview panels in landscape mode.

Change-Id: I9c06a345233d366669972359c58c3427a518e2b9

1 files changed, 99 insertions, 6 deletions

diff --git a/src/com/android/launcher3/LauncherStateTransitionAnimation.java b/src/com/android/launcher3/LauncherStateTransitionAnimation.java
index 0e20fabbd..d3af19a9e 100644
--- a/src/com/android/launcher3/LauncherStateTransitionAnimation.java
+++ b/src/com/android/launcher3/LauncherStateTransitionAnimation.java
@@ -176,7 +176,7 @@ public class LauncherStateTransitionAnimation {
     }
 
     /**
-     * Starts and animation to the workspace from the current overlay view.
+     * Starts an animation to the workspace from the current overlay view.
      */
     public void startAnimationToWorkspace(final Launcher.State fromState,
             final Workspace.State fromWorkspaceState, final Workspace.State toWorkspaceState,
@@ -190,9 +190,13 @@ public class LauncherStateTransitionAnimation {
         if (fromState == Launcher.State.APPS || fromState == Launcher.State.APPS_SPRING_LOADED) {
             startAnimationToWorkspaceFromAllApps(fromWorkspaceState, toWorkspaceState,
                     animated, onCompleteRunnable);
-        } else {
+        } else if (fromState == Launcher.State.WIDGETS ||
+                fromState == Launcher.State.WIDGETS_SPRING_LOADED) {
             startAnimationToWorkspaceFromWidgets(fromWorkspaceState, toWorkspaceState,
                     animated, onCompleteRunnable);
+        } else {
+            startAnimationToNewWorkspaceState(fromWorkspaceState, toWorkspaceState,
+                    animated, onCompleteRunnable);
         }
     }
 
@@ -403,7 +407,7 @@ public class LauncherStateTransitionAnimation {
     }
 
     /**
-     * Starts and animation to the workspace from the apps view.
+     * Starts an animation to the workspace from the apps view.
      */
     private void startAnimationToWorkspaceFromAllApps(final Workspace.State fromWorkspaceState,
             final Workspace.State toWorkspaceState, final boolean animated, 
@@ -448,10 +452,10 @@ public class LauncherStateTransitionAnimation {
     }
 
     /**
-     * Starts and animation to the workspace from the widgets view.
+     * Starts an animation to the workspace from the widgets view.
      */
     private void startAnimationToWorkspaceFromWidgets(final Workspace.State fromWorkspaceState,
-            final Workspace.State toWorkspaceState, final boolean animated, 
+            final Workspace.State toWorkspaceState, final boolean animated,
             final Runnable onCompleteRunnable) {
         final WidgetsContainerView widgetsView = mLauncher.getWidgetsView();
         PrivateTransitionCallbacks cb = new PrivateTransitionCallbacks() {
@@ -477,6 +481,95 @@ public class LauncherStateTransitionAnimation {
     }
 
     /**
+     * Starts an animation to the workspace from another workspace state, e.g. normal to overview.
+     */
+    private void startAnimationToNewWorkspaceState(final Workspace.State fromWorkspaceState,
+            final Workspace.State toWorkspaceState, final boolean animated,
+            final Runnable onCompleteRunnable) {
+        final View fromWorkspace = mLauncher.getWorkspace();
+        final HashMap<View, Integer> layerViews = new HashMap<>();
+        final AnimatorSet animation = LauncherAnimUtils.createAnimatorSet();
+        final int revealDuration = mLauncher.getResources()
+                .getInteger(R.integer.config_overlayRevealTime);
+
+        // 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.startWorkspaceStateChangeAnimation(toWorkspaceState,
+                animated, layerViews);
+
+        startWorkspaceSearchBarAnimation(animation, fromWorkspaceState, toWorkspaceState,
+                animated ? revealDuration : 0, null);
+
+        if (animated) {
+            if (workspaceAnim != null) {
+                animation.play(workspaceAnim);
+            }
+            dispatchOnLauncherTransitionPrepare(fromWorkspace, animated, true);
+
+            final AnimatorSet stateAnimation = animation;
+            final Runnable startAnimRunnable = new Runnable() {
+                @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+                public void run() {
+                    // Check that mCurrentAnimation hasn't changed while
+                    // we waited for a layout/draw pass
+                    if (mCurrentAnimation != stateAnimation)
+                        return;
+
+                    dispatchOnLauncherTransitionStart(fromWorkspace, animated, true);
+
+                    // 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.ATLEAST_LOLLIPOP && v.isAttachedToWindow()) {
+                            v.buildLayer();
+                        }
+                    }
+                    stateAnimation.start();
+                }
+            };
+            animation.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    dispatchOnLauncherTransitionEnd(fromWorkspace, animated, true);
+
+                    // Run any queued runnables
+                    if (onCompleteRunnable != null) {
+                        onCompleteRunnable.run();
+                    }
+
+                    // Disable all necessary layers
+                    for (View v : layerViews.keySet()) {
+                        if (layerViews.get(v) == BUILD_AND_SET_LAYER) {
+                            v.setLayerType(View.LAYER_TYPE_NONE, null);
+                        }
+                    }
+
+                    // This can hold unnecessary references to views.
+                    cleanupAnimation();
+                }
+            });
+            fromWorkspace.post(startAnimRunnable);
+            mCurrentAnimation = animation;
+        } else /* if (!animated) */ {
+            dispatchOnLauncherTransitionPrepare(fromWorkspace, animated, true);
+            dispatchOnLauncherTransitionStart(fromWorkspace, animated, true);
+            dispatchOnLauncherTransitionEnd(fromWorkspace, animated, true);
+
+            // Run any queued runnables
+            if (onCompleteRunnable != null) {
+                onCompleteRunnable.run();
+            }
+
+            mCurrentAnimation = null;
+        }
+    }
+
+    /**
      * Creates and starts a new animation to the workspace.
      */
     private AnimatorSet startAnimationToWorkspaceFromOverlay(final Workspace.State fromWorkspaceState,
@@ -683,7 +776,7 @@ public class LauncherStateTransitionAnimation {
             fromView.post(startAnimRunnable);
 
             return animation;
-        } else {
+        } else /* if (!(animated && initialized)) */ {
             fromView.setVisibility(View.GONE);
             dispatchOnLauncherTransitionPrepare(fromView, animated, true);
             dispatchOnLauncherTransitionStart(fromView, animated, true);