Home | History | Annotate | Download | only in widget 
      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 CharSequence getAccessibilityClassName() {
     52         return CompoundButton.class.getName();
     53     }
     54 
     55     @Override
     56     public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
     57         super.onInitializeAccessibilityEvent(event);
     58         event.setChecked(isSelected());
     59     }
     60 
     61     @Override
     62     public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
     63         super.onInitializeAccessibilityNodeInfo(info);
     64         info.setSelected(false);
     65         info.setCheckable(true);
     66         info.setChecked(isSelected());
     67     }
     68 
     69     public void setSelected(boolean selected, boolean animate) {
     70         if (isSelected() == selected) {
     71             return;
     72         }
     73         setSelected(selected);
     74         if (selected) {
     75             if (animate) {
     76                 animate().translationZ(mSelectedElevation)
     77                         .alpha(mSelectedPageAlpha);
     78             } else {
     79                 setTranslationZ(mSelectedElevation);
     80                 setAlpha(mSelectedPageAlpha);
     81             }
     82         } else {
     83             if (animate) {
     84                 animate().translationZ(mNotSelectedElevation)
     85                         .alpha(mNotSelectedAlpha);
     86             } else {
     87                 setTranslationZ(mNotSelectedElevation);
     88                 setAlpha(mNotSelectedAlpha);
     89             }
     90         }
     91     }
     92 }
     93