| /* |
| * Copyright (C) 2007 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.example.android.apis.view; |
| |
| import android.app.Activity; |
| import android.os.Bundle; |
| import android.view.ViewGroup; |
| import android.widget.LinearLayout; |
| |
| /** |
| * {@link android.view.View#requestFocus(int, android.graphics.Rect)} |
| * and |
| * {@link android.view.View#onFocusChanged(boolean, int, android.graphics.Rect)} |
| * work together to give a newly focused item a hint about the most interesting |
| * rectangle of the previously focused view. The view taking focus can use this |
| * to set an internal selection more appropriate using this rect. |
| * |
| * This Activity excercises that behavior using three adjacent {@link InternalSelectionView} |
| * that report interesting rects when giving up focus, and use interesting rects |
| * when taking focus to best select the internal row to show as selected. |
| * |
| * Were {@link InternalSelectionView} not to override {@link android.view.View#getFocusedRect}, or |
| * {@link android.view.View#onFocusChanged(boolean, int, android.graphics.Rect)}, the focus would |
| * jump to some default internal selection (the top) and not allow for the smooth handoff. |
| */ |
| public class InternalSelectionFocus extends Activity { |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| final LinearLayout layout = new LinearLayout(this); |
| layout.setOrientation(LinearLayout.HORIZONTAL); |
| layout.setLayoutParams(new ViewGroup.LayoutParams( |
| ViewGroup.LayoutParams.MATCH_PARENT, |
| ViewGroup.LayoutParams.MATCH_PARENT)); |
| |
| LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, |
| ViewGroup.LayoutParams.MATCH_PARENT, 1); |
| |
| final InternalSelectionView leftColumn = new InternalSelectionView(this, 5, "left column"); |
| leftColumn.setLayoutParams(params); |
| leftColumn.setPadding(10, 10, 10, 10); |
| layout.addView(leftColumn); |
| |
| final InternalSelectionView middleColumn = new InternalSelectionView(this, 5, "middle column"); |
| middleColumn.setLayoutParams(params); |
| middleColumn.setPadding(10, 10, 10, 10); |
| layout.addView(middleColumn); |
| |
| final InternalSelectionView rightColumn = new InternalSelectionView(this, 5, "right column"); |
| rightColumn.setLayoutParams(params); |
| rightColumn.setPadding(10, 10, 10, 10); |
| layout.addView(rightColumn); |
| |
| setContentView(layout); |
| } |
| |
| |
| } |