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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.widget.focus;
     18 
     19 import android.util.InternalSelectionView;
     20 
     21 import android.app.Activity;
     22 import android.os.Bundle;
     23 import android.widget.LinearLayout;
     24 import android.view.ViewGroup;
     25 
     26 /**
     27  * {@link android.view.FocusFinder#findNextFocus(android.view.ViewGroup, android.view.View, int)}
     28  * and
     29  * {@link android.view.View#requestFocus(int, android.graphics.Rect)}
     30  * work together to give a newly focused item a hint about the most interesting
     31  * rectangle of the previously focused view.  The view taking focus can use this
     32  * to set an internal selection more appropriate using this rect.
     33  *
     34  * This Activity excercises that behavior using three adjacent {@link android.util.InternalSelectionView}
     35  * that report interesting rects when giving up focus, and use interesting rects
     36  * when taking focus to best select the internal row to show as selected.
     37  */
     38 public class AdjacentVerticalRectLists extends Activity {
     39 
     40     private LinearLayout mLayout;
     41     private InternalSelectionView mLeftColumn;
     42     private InternalSelectionView mMiddleColumn;
     43     private InternalSelectionView mRightColumn;
     44 
     45 
     46     public LinearLayout getLayout() {
     47         return mLayout;
     48     }
     49 
     50     public InternalSelectionView getLeftColumn() {
     51         return mLeftColumn;
     52     }
     53 
     54     public InternalSelectionView getMiddleColumn() {
     55         return mMiddleColumn;
     56     }
     57 
     58     public InternalSelectionView getRightColumn() {
     59         return mRightColumn;
     60     }
     61 
     62     @Override
     63     protected void onCreate(Bundle icicle) {
     64         super.onCreate(icicle);
     65 
     66         mLayout = new LinearLayout(this);
     67         mLayout.setOrientation(LinearLayout.HORIZONTAL);
     68         mLayout.setLayoutParams(new ViewGroup.LayoutParams(
     69                 ViewGroup.LayoutParams.MATCH_PARENT,
     70                 ViewGroup.LayoutParams.MATCH_PARENT));
     71 
     72         LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0,
     73                 ViewGroup.LayoutParams.MATCH_PARENT, 1);
     74 
     75         mLeftColumn = new InternalSelectionView(this, 5, "left column");
     76         mLeftColumn.setLayoutParams(params);
     77         mLeftColumn.setPadding(10, 10, 10, 10);
     78         mLayout.addView(mLeftColumn);
     79 
     80         mMiddleColumn = new InternalSelectionView(this, 5, "middle column");
     81         mMiddleColumn.setLayoutParams(params);
     82         mMiddleColumn.setPadding(10, 10, 10, 10);
     83         mLayout.addView(mMiddleColumn);
     84 
     85         mRightColumn = new InternalSelectionView(this, 5, "right column");
     86         mRightColumn.setLayoutParams(params);
     87         mRightColumn.setPadding(10, 10, 10, 10);
     88         mLayout.addView(mRightColumn);
     89 
     90         setContentView(mLayout);
     91     }
     92 
     93 
     94 }
     95