1 files changed, 136 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/app/ActivityState.java b/src/com/android/gallery3d/app/ActivityState.java
new file mode 100644
index 000000000..bfacc5484
--- /dev/null
+++ b/src/com/android/gallery3d/app/ActivityState.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2010 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.gallery3d.app;
+
+import com.android.gallery3d.ui.GLView;
+
+import android.app.ActionBar;
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.WindowManager;
+
+abstract public class ActivityState {
+    public static final int FLAG_HIDE_ACTION_BAR = 1;
+    public static final int FLAG_HIDE_STATUS_BAR = 2;
+
+    protected GalleryActivity mActivity;
+    protected Bundle mData;
+    protected int mFlags;
+
+    protected ResultEntry mReceivedResults;
+    protected ResultEntry mResult;
+
+    protected static class ResultEntry {
+        public int requestCode;
+        public int resultCode = Activity.RESULT_CANCELED;
+        public Intent resultData;
+        ResultEntry next;
+    }
+
+    protected ActivityState() {
+    }
+
+    protected void setContentPane(GLView content) {
+        mActivity.getGLRoot().setContentPane(content);
+    }
+
+    void initialize(GalleryActivity activity, Bundle data) {
+        mActivity = activity;
+        mData = data;
+    }
+
+    public Bundle getData() {
+        return mData;
+    }
+
+    protected void onBackPressed() {
+        mActivity.getStateManager().finishState(this);
+    }
+
+    protected void setStateResult(int resultCode, Intent data) {
+        if (mResult == null) return;
+        mResult.resultCode = resultCode;
+        mResult.resultData = data;
+    }
+
+    protected void onSaveState(Bundle outState) {
+    }
+
+    protected void onStateResult(int requestCode, int resultCode, Intent data) {
+    }
+
+    protected void onCreate(Bundle data, Bundle storedState) {
+    }
+
+    protected void onPause() {
+    }
+
+    // should only be called by StateManager
+    void resume() {
+        Activity activity = (Activity) mActivity;
+        ActionBar actionBar = activity.getActionBar();
+        if (actionBar != null) {
+            if ((mFlags & FLAG_HIDE_ACTION_BAR) != 0) {
+                actionBar.hide();
+            } else {
+                actionBar.show();
+            }
+            int stateCount = mActivity.getStateManager().getStateCount();
+            actionBar.setDisplayOptions(
+                    stateCount == 1 ? 0 : ActionBar.DISPLAY_HOME_AS_UP,
+                    ActionBar.DISPLAY_HOME_AS_UP);
+        }
+
+        activity.invalidateOptionsMenu();
+
+        if ((mFlags & FLAG_HIDE_STATUS_BAR) != 0) {
+            WindowManager.LayoutParams params = ((Activity) mActivity).getWindow().getAttributes();
+            params.systemUiVisibility = View.STATUS_BAR_HIDDEN;
+            ((Activity) mActivity).getWindow().setAttributes(params);
+        } else {
+            WindowManager.LayoutParams params = ((Activity) mActivity).getWindow().getAttributes();
+            params.systemUiVisibility = View.STATUS_BAR_VISIBLE;
+            ((Activity) mActivity).getWindow().setAttributes(params);
+        }
+
+        ResultEntry entry = mReceivedResults;
+        if (entry != null) {
+            mReceivedResults = null;
+            onStateResult(entry.requestCode, entry.resultCode, entry.resultData);
+        }
+        onResume();
+    }
+
+    // a subclass of ActivityState should override the method to resume itself
+    protected void onResume() {
+    }
+
+    protected boolean onCreateActionBar(Menu menu) {
+        return false;
+    }
+
+    protected boolean onItemSelected(MenuItem item) {
+        return false;
+    }
+
+    protected void onDestroy() {
+    }
+}