| /* |
| * 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 android.transition; |
| |
| import android.view.View; |
| |
| /** |
| * Base class for <code>TransitionPropagation</code>s that care about |
| * View Visibility and the center position of the View. |
| */ |
| public abstract class VisibilityPropagation extends TransitionPropagation { |
| |
| /** |
| * The property key used for {@link android.view.View#getVisibility()}. |
| */ |
| private static final String PROPNAME_VISIBILITY = "android:visibilityPropagation:visibility"; |
| |
| /** |
| * The property key used for the center of the View in screen coordinates. This is an |
| * int[2] with the index 0 taking the x coordinate and index 1 taking the y coordinate. |
| */ |
| private static final String PROPNAME_VIEW_CENTER = "android:visibilityPropagation:center"; |
| |
| private static final String[] VISIBILITY_PROPAGATION_VALUES = { |
| PROPNAME_VISIBILITY, |
| PROPNAME_VIEW_CENTER, |
| }; |
| |
| @Override |
| public void captureValues(TransitionValues values) { |
| View view = values.view; |
| Integer visibility = (Integer) values.values.get(Visibility.PROPNAME_VISIBILITY); |
| if (visibility == null) { |
| visibility = view.getVisibility(); |
| } |
| values.values.put(PROPNAME_VISIBILITY, visibility); |
| int[] loc = new int[2]; |
| view.getLocationOnScreen(loc); |
| loc[0] += Math.round(view.getTranslationX()); |
| loc[0] += view.getWidth() / 2; |
| loc[1] += Math.round(view.getTranslationY()); |
| loc[1] += view.getHeight() / 2; |
| values.values.put(PROPNAME_VIEW_CENTER, loc); |
| } |
| |
| @Override |
| public String[] getPropagationProperties() { |
| return VISIBILITY_PROPAGATION_VALUES; |
| } |
| |
| /** |
| * Returns {@link android.view.View#getVisibility()} for the View at the time the values |
| * were captured. |
| * @param values The TransitionValues captured at the start or end of the Transition. |
| * @return {@link android.view.View#getVisibility()} for the View at the time the values |
| * were captured. |
| */ |
| public int getViewVisibility(TransitionValues values) { |
| if (values == null) { |
| return View.GONE; |
| } |
| Integer visibility = (Integer) values.values.get(PROPNAME_VISIBILITY); |
| if (visibility == null) { |
| return View.GONE; |
| } |
| return visibility; |
| } |
| |
| /** |
| * Returns the View's center x coordinate, relative to the screen, at the time the values |
| * were captured. |
| * @param values The TransitionValues captured at the start or end of the Transition. |
| * @return the View's center x coordinate, relative to the screen, at the time the values |
| * were captured. |
| */ |
| public int getViewX(TransitionValues values) { |
| return getViewCoordinate(values, 0); |
| } |
| |
| /** |
| * Returns the View's center y coordinate, relative to the screen, at the time the values |
| * were captured. |
| * @param values The TransitionValues captured at the start or end of the Transition. |
| * @return the View's center y coordinate, relative to the screen, at the time the values |
| * were captured. |
| */ |
| public int getViewY(TransitionValues values) { |
| return getViewCoordinate(values, 1); |
| } |
| |
| private static int getViewCoordinate(TransitionValues values, int coordinateIndex) { |
| if (values == null) { |
| return -1; |
| } |
| |
| int[] coordinates = (int[]) values.values.get(PROPNAME_VIEW_CENTER); |
| if (coordinates == null) { |
| return -1; |
| } |
| |
| return coordinates[coordinateIndex]; |
| } |
| } |