Making workspace->overview transition smoother

- Also set interpolator on page indicators

Change-Id: I06195bed06d773af8f629834d548b8b215e9ff59

2 files changed, 30 insertions, 22 deletions

diff --git a/src/com/android/launcher3/FastBitmapDrawable.java b/src/com/android/launcher3/FastBitmapDrawable.java
index ea623f765..847a8e1bc 100644
--- a/src/com/android/launcher3/FastBitmapDrawable.java
+++ b/src/com/android/launcher3/FastBitmapDrawable.java
@@ -27,12 +27,18 @@ import android.graphics.drawable.Drawable;
 class FastBitmapDrawable extends Drawable {
     private Bitmap mBitmap;
     private int mAlpha;
+    private int mWidth;
+    private int mHeight;
     private final Paint mPaint = new Paint(Paint.FILTER_BITMAP_FLAG);
 
     FastBitmapDrawable(Bitmap b) {
     	mAlpha = 255;
         mBitmap = b;
+        if (b != null) {
         setBounds(0, 0, b.getWidth(), b.getHeight());
+        } else {
+            mWidth = mHeight = 0;
+        }
     }
 
     @Override
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 181b65328..26f14d3ae 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -31,7 +31,6 @@ import android.appwidget.AppWidgetHostView;
 import android.appwidget.AppWidgetProviderInfo;
 import android.content.ComponentName;
 import android.content.Context;
-import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
@@ -2324,6 +2323,7 @@ public class Workspace extends SmoothPagedView
         final View searchBar = mLauncher.getQsbBar();
         final View overviewPanel = mLauncher.getOverviewPanel();
         final View hotseat = mLauncher.getHotseat();
+        final View pageIndicator = getPageIndicator();
         if (animated) {
             anim.setDuration(duration);
             LauncherViewPropertyAnimator scale = new LauncherViewPropertyAnimator(this);
@@ -2366,34 +2366,36 @@ public class Workspace extends SmoothPagedView
                     }
                 }
             }
-            ObjectAnimator pageIndicatorAlpha = null;
-            if (getPageIndicator() != null) {
-                pageIndicatorAlpha = ObjectAnimator.ofFloat(getPageIndicator(), "alpha",
-                        finalHotseatAndPageIndicatorAlpha);
-            }
-            ObjectAnimator hotseatAlpha = ObjectAnimator.ofFloat(hotseat, "alpha",
-                    finalHotseatAndPageIndicatorAlpha);
-            ObjectAnimator searchBarAlpha = null;
-            if (mShowSearchBar) {
-                searchBarAlpha = ObjectAnimator.ofFloat(searchBar,
-                        "alpha", finalSearchBarAlpha);
+            Animator pageIndicatorAlpha = null;
+            if (pageIndicator != null) {
+                pageIndicatorAlpha = new LauncherViewPropertyAnimator(pageIndicator)
+                    .alpha(finalHotseatAndPageIndicatorAlpha).withLayer();
+            } else {
+                // create a dummy animation so we don't need to do null checks later
+                pageIndicatorAlpha = ValueAnimator.ofFloat(0, 0);
             }
-            ObjectAnimator overviewPanelAlpha = ObjectAnimator.ofFloat(overviewPanel,
-                    "alpha", finalOverviewPanelAlpha);
+            Animator hotseatAlpha = new LauncherViewPropertyAnimator(hotseat)
+                .alpha(finalHotseatAndPageIndicatorAlpha).withLayer();
+            Animator searchBarAlpha = new LauncherViewPropertyAnimator(searchBar)
+                .alpha(finalSearchBarAlpha).withLayer();
+            Animator overviewPanelAlpha = new LauncherViewPropertyAnimator(overviewPanel)
+                .alpha(finalOverviewPanelAlpha).withLayer();
 
-            overviewPanelAlpha.addListener(new AlphaUpdateListener(overviewPanel));
+            pageIndicatorAlpha.addListener(new AlphaUpdateListener(pageIndicator));
             hotseatAlpha.addListener(new AlphaUpdateListener(hotseat));
             if (mShowSearchBar) searchBarAlpha.addListener(new AlphaUpdateListener(searchBar));
+            overviewPanelAlpha.addListener(new AlphaUpdateListener(overviewPanel));
 
             if (workspaceToOverview) {
+                pageIndicatorAlpha.setInterpolator(new DecelerateInterpolator(2));
                 hotseatAlpha.setInterpolator(new DecelerateInterpolator(2));
+                overviewPanelAlpha.setInterpolator(null);
             } else if (overviewToWorkspace) {
+                pageIndicatorAlpha.setInterpolator(null);
+                hotseatAlpha.setInterpolator(null);
                 overviewPanelAlpha.setInterpolator(new DecelerateInterpolator(2));
             }
-
-            if (getPageIndicator() != null) {
-                pageIndicatorAlpha.addListener(new AlphaUpdateListener(getPageIndicator()));
-            }
+            searchBarAlpha.setInterpolator(null);
 
             overviewPanel.setAlpha(finalOverviewPanelAlpha);
             AlphaUpdateListener.updateVisibility(overviewPanel);
@@ -2408,9 +2410,9 @@ public class Workspace extends SmoothPagedView
             AlphaUpdateListener.updateVisibility(overviewPanel);
             hotseat.setAlpha(finalHotseatAndPageIndicatorAlpha);
             AlphaUpdateListener.updateVisibility(hotseat);
-            if (getPageIndicator() != null) {
-                getPageIndicator().setAlpha(finalHotseatAndPageIndicatorAlpha);
-                AlphaUpdateListener.updateVisibility(getPageIndicator());
+            if (pageIndicator != null) {
+                pageIndicator.setAlpha(finalHotseatAndPageIndicatorAlpha);
+                AlphaUpdateListener.updateVisibility(pageIndicator);
             }
             if (mShowSearchBar) {
                 searchBar.setAlpha(finalSearchBarAlpha);