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      1 /*
      2  * Copyright (C) 2006 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.settings;
     18 
     19 import android.app.Activity;
     20 import android.app.ActivityManagerNative;
     21 import android.content.res.Configuration;
     22 import android.content.res.Resources;
     23 import android.content.res.TypedArray;
     24 import android.os.Bundle;
     25 import android.os.RemoteException;
     26 import android.util.DisplayMetrics;
     27 import android.util.TypedValue;
     28 import android.view.View;
     29 import android.widget.ArrayAdapter;
     30 import android.widget.Button;
     31 import android.widget.Spinner;
     32 import android.widget.TextView;
     33 
     34 
     35 public class Display extends Activity implements View.OnClickListener {
     36     @Override
     37     public void onCreate(Bundle icicle) {
     38         super.onCreate(icicle);
     39 
     40         setContentView(R.layout.display);
     41 
     42         mFontSize = (Spinner) findViewById(R.id.fontSize);
     43         mFontSize.setOnItemSelectedListener(mFontSizeChanged);
     44         String[] states = new String[3];
     45         Resources r = getResources();
     46         states[0] = r.getString(R.string.small_font);
     47         states[1] = r.getString(R.string.medium_font);
     48         states[2] = r.getString(R.string.large_font);
     49         ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
     50                 android.R.layout.simple_spinner_item, states);
     51         adapter.setDropDownViewResource(
     52                 android.R.layout.simple_spinner_dropdown_item);
     53         mFontSize.setAdapter(adapter);
     54 
     55         mPreview = (TextView) findViewById(R.id.preview);
     56         mPreview.setText(r.getText(R.string.font_size_preview_text));
     57 
     58         Button save = (Button) findViewById(R.id.save);
     59         save.setText(r.getText(R.string.font_size_save));
     60         save.setOnClickListener(this);
     61 
     62         mTextSizeTyped = new TypedValue();
     63         TypedArray styledAttributes =
     64             obtainStyledAttributes(android.R.styleable.TextView);
     65         styledAttributes.getValue(android.R.styleable.TextView_textSize,
     66                 mTextSizeTyped);
     67 
     68         DisplayMetrics metrics = getResources().getDisplayMetrics();
     69         mDisplayMetrics = new DisplayMetrics();
     70         mDisplayMetrics.density = metrics.density;
     71         mDisplayMetrics.heightPixels = metrics.heightPixels;
     72         mDisplayMetrics.scaledDensity = metrics.scaledDensity;
     73         mDisplayMetrics.widthPixels = metrics.widthPixels;
     74         mDisplayMetrics.xdpi = metrics.xdpi;
     75         mDisplayMetrics.ydpi = metrics.ydpi;
     76 
     77         styledAttributes.recycle();
     78     }
     79 
     80     @Override
     81     public void onResume() {
     82         super.onResume();
     83         try {
     84             mCurConfig.updateFrom(
     85                 ActivityManagerNative.getDefault().getConfiguration());
     86         } catch (RemoteException e) {
     87         }
     88         if (mCurConfig.fontScale < 1) {
     89             mFontSize.setSelection(0);
     90         } else if (mCurConfig.fontScale > 1) {
     91             mFontSize.setSelection(2);
     92         } else {
     93             mFontSize.setSelection(1);
     94         }
     95         updateFontScale();
     96     }
     97 
     98     private void updateFontScale() {
     99         mDisplayMetrics.scaledDensity = mDisplayMetrics.density *
    100                 mCurConfig.fontScale;
    101 
    102         float size = mTextSizeTyped.getDimension(mDisplayMetrics);
    103         mPreview.setTextSize(TypedValue.COMPLEX_UNIT_PX, size);
    104     }
    105 
    106     public void onClick(View v) {
    107         try {
    108             ActivityManagerNative.getDefault().updatePersistentConfiguration(mCurConfig);
    109         } catch (RemoteException e) {
    110         }
    111         finish();
    112     }
    113 
    114     private Spinner.OnItemSelectedListener mFontSizeChanged
    115                                     = new Spinner.OnItemSelectedListener() {
    116         public void onItemSelected(android.widget.AdapterView av, View v,
    117                                     int position, long id) {
    118             if (position == 0) {
    119                 mCurConfig.fontScale = .75f;
    120             } else if (position == 2) {
    121                 mCurConfig.fontScale = 1.25f;
    122             } else {
    123                 mCurConfig.fontScale = 1.0f;
    124             }
    125 
    126             updateFontScale();
    127         }
    128 
    129         public void onNothingSelected(android.widget.AdapterView av) {
    130         }
    131     };
    132 
    133     private Spinner mFontSize;
    134     private TextView mPreview;
    135     private TypedValue mTextSizeTyped;
    136     private DisplayMetrics mDisplayMetrics;
    137     private Configuration mCurConfig = new Configuration();
    138 }
    139