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package com.android.settings;
import android.app.ActivityManagerNative;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.os.RemoteException;
import android.preference.DialogPreference;
import android.preference.Preference;
import android.provider.Settings;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.SeekBar;
import android.widget.TextView;
public class FontDialogPreference extends DialogPreference
implements SeekBar.OnSeekBarChangeListener {
private TextView mDescriptionText;
private TextView mPercentageText;
private IntervalSeekBar mSeekBar;
private DisplayMetrics mDisplayMetrics;
private int mLargeTextSp;
private int mSmallTextSp;
public FontDialogPreference(Context context, AttributeSet attrs) {
super(context, attrs);
setPositiveButtonText(android.R.string.ok);
setNegativeButtonText(android.R.string.cancel);
initDisplayMetrics();
setDialogLayoutResource(R.layout.preference_dialog_fontsize);
setDialogTitle(null); // Hide the title bar
}
@Override
protected View onCreateDialogView() {
LayoutInflater inflater =
(LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.preference_dialog_fontsize, null);
mDescriptionText = (TextView) view.findViewById(R.id.description);
mPercentageText = (TextView) view.findViewById(R.id.percentage);
// Calculate original sp sizes for the text views
mLargeTextSp = Math.round(mDescriptionText.getTextSize() / mDisplayMetrics.scaledDensity);
mSmallTextSp = Math.round(mPercentageText.getTextSize() / mDisplayMetrics.scaledDensity);
mSeekBar = (IntervalSeekBar) view.findViewById(R.id.font_size);
String strFontSize = getPersistedString(String.valueOf(mSeekBar.getDefault()));
float fontSize = Float.parseFloat(strFontSize);
mSeekBar.setProgressFloat(fontSize);
mSeekBar.setOnSeekBarChangeListener(this);
setPrompt(fontSize);
return view;
}
private void initDisplayMetrics() {
DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
mDisplayMetrics = new DisplayMetrics();
mDisplayMetrics.density = metrics.density;
mDisplayMetrics.heightPixels = metrics.heightPixels;
mDisplayMetrics.scaledDensity = metrics.scaledDensity;
mDisplayMetrics.widthPixels = metrics.widthPixels;
mDisplayMetrics.xdpi = metrics.xdpi;
mDisplayMetrics.ydpi = metrics.ydpi;
}
@Override
protected void onDialogClosed(boolean positiveResult) {
if (positiveResult) {
// Notify the Display settings screen (parent) that the font size
// is about to change. This can determine whether to persist the
// current value
if (callChangeListener(mSeekBar.getProgressFloat())) {
// Originally font scaling was a float stored as a String,
// so using persistFloat raises a ClassCastException
persistString(Float.toString(mSeekBar.getProgressFloat()));
}
}
}
@Override
protected void onClick() {
// Ignore this until an explicit call to click()
}
public void click() {
super.onClick();
}
/**
* Get an approximate description for the font size scale.
* Assumes that the string arrays entries_font_size and
* entryvalues_font_size have the same length and correspond to each other
* i.e. they are in the same order.
*/
static String getFontSizeDescription(Resources r, float val) {
String[] names = r.getStringArray(R.array.entries_font_size);
String[] indices = r.getStringArray(R.array.entryvalues_font_size);
float lastVal = Float.parseFloat(indices[0]);
for (int i = 1; i < indices.length; i++) {
float thisVal = Float.parseFloat(indices[i]);
if (val < (lastVal + (thisVal-lastVal)*.5f)) {
return names[i - 1];
}
lastVal = thisVal;
}
return names[indices.length - 1];
}
/**
* Set the TextView indicating the font scaling
*/
private void setPrompt(float fontScaling) {
// Update the preview text
String percentage = Math.round(fontScaling * 100) + "%";
mPercentageText.setText(percentage);
// Update the preview sizes
mDisplayMetrics.scaledDensity = mDisplayMetrics.density * fontScaling;
float largeSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, mLargeTextSp,
mDisplayMetrics);
float smallSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, mSmallTextSp,
mDisplayMetrics);
mDescriptionText.setTextSize(TypedValue.COMPLEX_UNIT_PX, largeSize);
mPercentageText.setTextSize(TypedValue.COMPLEX_UNIT_PX, smallSize);
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
setPrompt(mSeekBar.getProgressFloat());
}
// Not used
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
}
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