Home | History | Annotate | Download | only in display 
      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 
     15 package com.android.settings.display;
     16 
     17 import android.content.Context;
     18 import android.content.res.Resources;
     19 import android.text.InputType;
     20 import android.util.AttributeSet;
     21 import android.util.DisplayMetrics;
     22 import android.util.Slog;
     23 import android.view.Display;
     24 import android.view.View;
     25 import android.widget.EditText;
     26 import com.android.settings.CustomEditTextPreference;
     27 import com.android.settings.R;
     28 import com.android.settingslib.display.DisplayDensityUtils;
     29 
     30 public class DensityPreference extends CustomEditTextPreference {
     31     private static final String TAG = "DensityPreference";
     32 
     33     public DensityPreference(Context context, AttributeSet attrs) {
     34         super(context, attrs);
     35     }
     36 
     37     @Override
     38     public void onAttached() {
     39         super.onAttached();
     40 
     41         setSummary(getContext().getString(R.string.developer_density_summary, getCurrentSwDp()));
     42     }
     43 
     44     private int getCurrentSwDp() {
     45         final Resources res = getContext().getResources();
     46         final DisplayMetrics metrics = res.getDisplayMetrics();
     47         final float density = metrics.density;
     48         final int minDimensionPx = Math.min(metrics.widthPixels, metrics.heightPixels);
     49         return (int) (minDimensionPx / density);
     50     }
     51 
     52     @Override
     53     protected void onBindDialogView(View view) {
     54         super.onBindDialogView(view);
     55 
     56         final EditText editText = (EditText) view.findViewById(android.R.id.edit);
     57 
     58         if (editText != null) {
     59             editText.setInputType(InputType.TYPE_CLASS_NUMBER);
     60             editText.setText(getCurrentSwDp() + "");
     61         }
     62     }
     63 
     64     @Override
     65     protected void onDialogClosed(boolean positiveResult) {
     66         if (positiveResult) {
     67             try {
     68                 final Resources res = getContext().getResources();
     69                 final DisplayMetrics metrics = res.getDisplayMetrics();
     70                 final int newSwDp = Math.max(Integer.parseInt(getText()), 320);
     71                 final int minDimensionPx = Math.min(metrics.widthPixels, metrics.heightPixels);
     72                 final int newDensity = DisplayMetrics.DENSITY_MEDIUM * minDimensionPx / newSwDp;
     73                 final int densityDpi = Math.max(newDensity, 120);
     74                 DisplayDensityUtils.setForcedDisplayDensity(Display.DEFAULT_DISPLAY, densityDpi);
     75             } catch (Exception e) {
     76                 // TODO: display a message instead of silently failing.
     77                 Slog.e(TAG, "Couldn't save density", e);
     78             }
     79         }
     80     }
     81 }
     82