Refactoring/simplifying Transition code/API

Transitions used to be three phase:
- captureValues(): get all relevant property values in the
affected view targets
- setup(): set appropriate start values for affected views
prior to any transitions being played
- play(): create/play Animators for affected views

Now the second and third phases have been collapsed (and named
"play()"). This single step sets initial values for target views
and creates any Animators that should be played during the transition.
The transition mechanism stores these Animators and then starts
them at the appropriate time in the overall transition.

Issue #9507585 Transitions: Simplify Transition.play() design

Change-Id: I3fc67599b38fe49eee885dc5d32444db90b7703b

1 files changed, 104 insertions, 0 deletions

diff --git a/tests/TransitionTests/src/com/android/transitiontests/HierarchicalMove.java b/tests/TransitionTests/src/com/android/transitiontests/HierarchicalMove.java
new file mode 100644
index 000000000000..093d7c1931a0
--- /dev/null
+++ b/tests/TransitionTests/src/com/android/transitiontests/HierarchicalMove.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2013 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.transitiontests;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.transition.Move;
+import android.view.transition.Transition;
+import android.view.transition.TransitionGroup;
+import android.view.transition.TransitionManager;
+import android.widget.Button;
+
+import static android.widget.LinearLayout.LayoutParams;
+
+public class HierarchicalMove extends Activity {
+
+    Button[] buttons = new Button[6];
+    ViewGroup mSceneRoot;
+    boolean wide = false;
+    Transition mTransition;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.hierarchical_move);
+
+        View container = (View) findViewById(R.id.container);
+        mSceneRoot = (ViewGroup) container.getParent();
+
+        buttons[0] = (Button) findViewById(R.id.button0);
+        buttons[1] = (Button) findViewById(R.id.button1);
+        buttons[2] = (Button) findViewById(R.id.button2);
+        buttons[3] = (Button) findViewById(R.id.button3);
+        buttons[4] = (Button) findViewById(R.id.button4);
+        buttons[5] = (Button) findViewById(R.id.button5);
+
+        // Move button0, then buttons 1/2 together, then buttons 3/4/5 sequentially:
+        // group (seq)
+        //    Move 0
+        //    group (seq)
+        //       group (together)
+        //          Move 1
+        //          Move 2
+        //       group (sequentially)
+        //          Move 3
+        //          Move 4/5
+        TransitionGroup rootTransition = new TransitionGroup(TransitionGroup.SEQUENTIALLY);
+
+        // button0
+        Transition move0 = new Move();
+        move0.setTargets(buttons[0]);
+
+        // buttons 1/2/3/4/5
+        TransitionGroup group12345 = new TransitionGroup(TransitionGroup.SEQUENTIALLY);
+
+        // buttons 1/2
+        TransitionGroup group12 = new TransitionGroup(TransitionGroup.TOGETHER);
+        Move move1 = new Move();
+        move1.setTargets(buttons[1]);
+        Move move2 = new Move();
+        move2.setTargets(buttons[2]);
+        group12.addTransitions(move1, move2);
+
+        TransitionGroup group345 = new TransitionGroup(TransitionGroup.SEQUENTIALLY);
+        Move move3 = new Move();
+        move3.setTargets(buttons[3]);
+        Move move45 = new Move();
+        move45.setTargets(buttons[4], buttons[5]);
+        group345.addTransitions(move3, move45);
+
+        group12345.addTransitions(move0, group12, group345);
+
+        rootTransition.addTransitions(group12345);
+        rootTransition.setDuration(1000);
+        mTransition = rootTransition;
+
+    }
+
+    public void sendMessage(View view) {
+        TransitionManager.beginDelayedTransition(mSceneRoot, mTransition);
+        int widthSpec = wide ? LayoutParams.WRAP_CONTENT : LayoutParams.MATCH_PARENT;
+        LayoutParams params = new LayoutParams(widthSpec, LayoutParams.WRAP_CONTENT);
+        for (int i = 0; i < buttons.length; ++i) {
+            buttons[i].setLayoutParams(params);
+        }
+        wide = !wide;
+    }
+
+}