Introduce AmbientState for StackScroller.
AmbientState is a global state for the algorithm of the
StackScroller. Dimmed and which child is activated was moved
into this state. Further, scale and dimmed is also a
StackScrollState and animated in StackStateAnimator.
Change-Id: Ia68131cee62b2e0005f55ea6dc400d149ec15278
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java
new file mode 100644
index 0000000..4121a40
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2014 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.systemui.statusbar.stack;
+
+import android.view.View;
+
+import java.util.ArrayList;
+
+/**
+ * A global state to track all input states for the algorithm.
+ */
+public class AmbientState {
+ private ArrayList<View> mDraggedViews = new ArrayList<View>();
+ private int mScrollY;
+ private boolean mDimmed;
+ private View mActivatedChild;
+
+ public int getScrollY() {
+ return mScrollY;
+ }
+
+ public void setScrollY(int scrollY) {
+ this.mScrollY = scrollY;
+ }
+
+ public void onBeginDrag(View view) {
+ mDraggedViews.add(view);
+ }
+
+ public void onDragFinished(View view) {
+ mDraggedViews.remove(view);
+ }
+
+ public ArrayList<View> getDraggedViews() {
+ return mDraggedViews;
+ }
+
+ /**
+ * @param dimmed Whether we are in a dimmed state (on the lockscreen), where the backgrounds are
+ * translucent and everything is scaled back a bit.
+ */
+ public void setDimmed(boolean dimmed) {
+ mDimmed = dimmed;
+ }
+
+ /**
+ * In dimmed mode, a child can be activated, which happens on the first tap of the double-tap
+ * interaction. This child is then scaled normally and its background is fully opaque.
+ */
+ public void setActivatedChild(View activatedChild) {
+ mActivatedChild = activatedChild;
+ }
+
+ public boolean isDimmed() {
+ return mDimmed;
+ }
+
+ public View getActivatedChild() {
+ return mActivatedChild;
+ }
+}