From bd7c016d728853d38f98a3c6077b7bd9b08858b9 Mon Sep 17 00:00:00 2001
From: Yuli Huang <yuli@google.com>
Date: Tue, 15 May 2012 22:36:59 +0800
Subject: [PATCH] Avoid black screen when PhotoPage just starts.

bug:5367032

Change-Id: I6bd56026ec32bcee972d69855966750b9a57cdf4
---
 src/com/android/gallery3d/app/PhotoPage.java         | 15 +++++++++++++++
 src/com/android/gallery3d/ui/PhotoView.java          |  4 ++++
 src/com/android/gallery3d/ui/PositionController.java |  2 +-
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/com/android/gallery3d/app/PhotoPage.java b/src/com/android/gallery3d/app/PhotoPage.java
index 52f7c4176..a46c777fa 100644
--- a/src/com/android/gallery3d/app/PhotoPage.java
+++ b/src/com/android/gallery3d/app/PhotoPage.java
@@ -71,8 +71,10 @@ public class PhotoPage extends ActivityState implements
     private static final int MSG_UNLOCK_ORIENTATION = 3;
     private static final int MSG_ON_FULL_SCREEN_CHANGED = 4;
     private static final int MSG_UPDATE_ACTION_BAR = 5;
+    private static final int MSG_UNFREEZE_GLROOT = 6;
 
     private static final int HIDE_BARS_TIMEOUT = 3500;
+    private static final int UNFREEZE_GLROOT_TIMEOUT = 250;
 
     private static final int REQUEST_SLIDESHOW = 1;
     private static final int REQUEST_CROP = 2;
@@ -276,6 +278,10 @@ public class PhotoPage extends ActivityState implements
                         updateBars();
                         break;
                     }
+                    case MSG_UNFREEZE_GLROOT: {
+                        mActivity.getGLRoot().unfreeze();
+                        break;
+                    }
                     default: throw new AssertionError(message.what);
                 }
             }
@@ -720,6 +726,8 @@ public class PhotoPage extends ActivityState implements
 
     @Override
     public void onPause() {
+        mActivity.getGLRoot().unfreeze();
+        mHandler.removeMessages(MSG_UNFREEZE_GLROOT);
         super.onPause();
         mIsActive = false;
         if (mAppBridge != null) mAppBridge.setServer(null);
@@ -733,7 +741,13 @@ public class PhotoPage extends ActivityState implements
     }
 
     @Override
+    public void onCurrentImageUpdated() {
+        mActivity.getGLRoot().unfreeze();
+    }
+
+    @Override
     protected void onResume() {
+        mActivity.getGLRoot().freeze();
         super.onResume();
         mIsActive = true;
         setContentPane(mRootPane);
@@ -750,6 +764,7 @@ public class PhotoPage extends ActivityState implements
             mAppBridge.setServer(this);
             mPhotoView.resetToFirstPicture();
         }
+        mHandler.sendEmptyMessageDelayed(MSG_UNFREEZE_GLROOT, UNFREEZE_GLROOT_TIMEOUT);
     }
 
     @Override
diff --git a/src/com/android/gallery3d/ui/PhotoView.java b/src/com/android/gallery3d/ui/PhotoView.java
index dce37289e..1c0484979 100644
--- a/src/com/android/gallery3d/ui/PhotoView.java
+++ b/src/com/android/gallery3d/ui/PhotoView.java
@@ -79,6 +79,7 @@ public class PhotoView extends GLView {
         public void unlockOrientation();
         public void onFullScreenChanged(boolean full);
         public void onActionBarAllowed(boolean allowed);
+        public void onCurrentImageUpdated();
     }
 
     // Here is a graph showing the places we need to lock/unlock device
@@ -318,6 +319,9 @@ public class PhotoView extends GLView {
     }
 
     public void notifyImageChange(int index) {
+        if (index == 0) {
+            mListener.onCurrentImageUpdated();
+        }
         mPictures.get(index).reload();
         invalidate();
     }
diff --git a/src/com/android/gallery3d/ui/PositionController.java b/src/com/android/gallery3d/ui/PositionController.java
index f49a0b727..99d36baec 100644
--- a/src/com/android/gallery3d/ui/PositionController.java
+++ b/src/com/android/gallery3d/ui/PositionController.java
@@ -207,6 +207,7 @@ class PositionController {
         }
 
         updateScaleAndGapLimit();
+        startOpeningAnimationIfNeeded();
         snapAndRedraw();
     }
 
@@ -233,7 +234,6 @@ class PositionController {
         }
 
         updateScaleAndGapLimit();
-        startOpeningAnimationIfNeeded();
         snapAndRedraw();
     }
 
-- 
2.11.0