Generalize SpringObjectAnimator.
This is in preparation for adding more springs to the state transitions.
Bug: 111698021
Change-Id: I32cd7894e940dae00895799280b244d68400d374
diff --git a/src/com/android/launcher3/ProgressInterface.java b/src/com/android/launcher3/ProgressInterface.java
new file mode 100644
index 0000000..663d8ba
--- /dev/null
+++ b/src/com/android/launcher3/ProgressInterface.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2019 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.launcher3;
+
+/**
+ * Progress is defined as a value with range [0, 1], and is specific to each implementor.
+ * It is used when there is a transition from one state of the UI to another.
+ */
+public interface ProgressInterface {
+ void setProgress(float progress);
+ float getProgress();
+}
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