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      1 /*
      2  * Copyright (C) 2014 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 com.android.printspooler.widget;
     18 
     19 import android.content.Context;
     20 import android.util.AttributeSet;
     21 import android.view.accessibility.AccessibilityEvent;
     22 import android.view.accessibility.AccessibilityNodeInfo;
     23 import android.widget.CompoundButton;
     24 import android.widget.LinearLayout;
     25 import com.android.printspooler.R;
     26 
     27 /**
     28  * This class represents the frame of page in the print preview list
     29  * that contains the page and a footer.
     30  */
     31 public final class PreviewPageFrame extends LinearLayout {
     32     private final float mSelectedElevation;
     33     private final float mNotSelectedElevation;
     34 
     35     private final float mSelectedPageAlpha;
     36     private final float mNotSelectedAlpha;
     37 
     38     public PreviewPageFrame(Context context, AttributeSet attrs) {
     39         super(context, attrs);
     40         mSelectedElevation = mContext.getResources().getDimension(
     41                 R.dimen.selected_page_elevation);
     42         mNotSelectedElevation = mContext.getResources().getDimension(
     43                 R.dimen.unselected_page_elevation);
     44         mSelectedPageAlpha = mContext.getResources().getFraction(
     45                 R.fraction.page_selected_alpha, 1, 1);
     46         mNotSelectedAlpha = mContext.getResources().getFraction(
     47                 R.fraction.page_unselected_alpha, 1, 1);
     48     }
     49 
     50     @Override
     51     public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
     52         super.onInitializeAccessibilityEvent(event);
     53         event.setClassName(CompoundButton.class.getName());
     54         event.setChecked(isSelected());
     55     }
     56 
     57     @Override
     58     public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
     59         super.onInitializeAccessibilityNodeInfo(info);
     60         info.setClassName(CompoundButton.class.getName());
     61         info.setSelected(false);
     62         info.setCheckable(true);
     63         info.setChecked(isSelected());
     64     }
     65 
     66     public void setSelected(boolean selected, boolean animate) {
     67         if (isSelected() == selected) {
     68             return;
     69         }
     70         setSelected(selected);
     71         if (selected) {
     72             if (animate) {
     73                 animate().translationZ(mSelectedElevation)
     74                         .alpha(mSelectedPageAlpha);
     75             } else {
     76                 setTranslationZ(mSelectedElevation);
     77                 setAlpha(mSelectedPageAlpha);
     78             }
     79         } else {
     80             if (animate) {
     81                 animate().translationZ(mNotSelectedElevation)
     82                         .alpha(mNotSelectedAlpha);
     83             } else {
     84                 setTranslationZ(mNotSelectedElevation);
     85                 setAlpha(mNotSelectedAlpha);
     86             }
     87         }
     88     }
     89 }
     90