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