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package org.fox.ttrss.util;
// http://www.lukehorvat.com/blog/android-seekbardialogpreference/
import org.fox.ttrss.R;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Parcel;
import android.os.Parcelable;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
/**
* A {@link DialogPreference} that provides a user with the means to select an
* integer from a {@link SeekBar}, and persist it.
*
* @author lukehorvat
*
*/
public class FontSizeDialogPreference extends DialogPreference {
private static final int DEFAULT_MIN_PROGRESS = 9;
private static final int DEFAULT_MAX_PROGRESS = 24;
private static final String DEFAULT_PROGRESS = "0";
private int mMinProgress = DEFAULT_MIN_PROGRESS;
private int mMaxProgress = DEFAULT_MAX_PROGRESS;
private int mProgress;
private CharSequence mProgressTextSuffix;
private TextView mProgressText;
private SeekBar mSeekBar;
public FontSizeDialogPreference(Context context) {
this(context, null);
}
public FontSizeDialogPreference(Context context, AttributeSet attrs) {
super(context, attrs);
setProgressTextSuffix(" " + context.getString(R.string.font_size_dialog_suffix));
// set layout
setDialogLayoutResource(R.layout.dialog_select_font_size);
setPositiveButtonText(android.R.string.ok);
setNegativeButtonText(android.R.string.cancel);
setDialogIcon(null);
}
@Override
protected void onSetInitialValue(boolean restore, Object defaultValue) {
setProgress(restore ? Integer.valueOf(getPersistedString(DEFAULT_PROGRESS))
: Integer.valueOf((String)defaultValue));
}
@Override
protected Object onGetDefaultValue(TypedArray a, int index) {
return a.getString(index);
}
@Override
protected void onBindDialogView(View view) {
super.onBindDialogView(view);
mProgressText = (TextView) view.findViewById(R.id.text_progress);
mSeekBar = (SeekBar) view.findViewById(R.id.seek_bar);
mSeekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// update text that displays the current SeekBar progress value
// note: this does not persist the progress value. that is only
// ever done in setProgress()
String progressStr = String.valueOf(progress + mMinProgress);
mProgressText.setText(mProgressTextSuffix == null ? progressStr
: progressStr.concat(mProgressTextSuffix.toString()));
mProgressText.setTextSize(TypedValue.COMPLEX_UNIT_SP, progress + mMinProgress);
}
});
mSeekBar.setMax(mMaxProgress - mMinProgress);
mSeekBar.setProgress(mProgress - mMinProgress);
}
public int getMinProgress() {
return mMinProgress;
}
public void setMinProgress(int minProgress) {
mMinProgress = minProgress;
setProgress(Math.max(mProgress, mMinProgress));
}
public int getMaxProgress() {
return mMaxProgress;
}
public void setMaxProgress(int maxProgress) {
mMaxProgress = maxProgress;
setProgress(Math.min(mProgress, mMaxProgress));
}
public int getProgress() {
return mProgress;
}
public void setProgress(int progress) {
progress = Math.max(Math.min(progress, mMaxProgress), mMinProgress);
if (progress != mProgress) {
mProgress = progress;
persistString(String.valueOf(progress));
notifyChanged();
}
}
public CharSequence getProgressTextSuffix() {
return mProgressTextSuffix;
}
public void setProgressTextSuffix(CharSequence progressTextSuffix) {
mProgressTextSuffix = progressTextSuffix;
}
@Override
protected void onDialogClosed(boolean positiveResult) {
super.onDialogClosed(positiveResult);
// when the user selects "OK", persist the new value
if (positiveResult) {
int seekBarProgress = mSeekBar.getProgress() + mMinProgress;
if (callChangeListener(seekBarProgress)) {
setProgress(seekBarProgress);
}
}
}
@Override
protected Parcelable onSaveInstanceState() {
// save the instance state so that it will survive screen orientation
// changes and other events that may temporarily destroy it
final Parcelable superState = super.onSaveInstanceState();
// set the state's value with the class member that holds current
// setting value
final SavedState myState = new SavedState(superState);
myState.minProgress = getMinProgress();
myState.maxProgress = getMaxProgress();
myState.progress = getProgress();
return myState;
}
@Override
protected void onRestoreInstanceState(Parcelable state) {
// check whether we saved the state in onSaveInstanceState()
if (state == null || !state.getClass().equals(SavedState.class)) {
// didn't save the state, so call superclass
super.onRestoreInstanceState(state);
return;
}
// restore the state
SavedState myState = (SavedState) state;
setMinProgress(myState.minProgress);
setMaxProgress(myState.maxProgress);
setProgress(myState.progress);
super.onRestoreInstanceState(myState.getSuperState());
}
private static class SavedState extends BaseSavedState {
int minProgress;
int maxProgress;
int progress;
public SavedState(Parcelable superState) {
super(superState);
}
public SavedState(Parcel source) {
super(source);
minProgress = source.readInt();
maxProgress = source.readInt();
progress = source.readInt();
}
@Override
public void writeToParcel(Parcel dest, int flags) {
super.writeToParcel(dest, flags);
dest.writeInt(minProgress);
dest.writeInt(maxProgress);
dest.writeInt(progress);
}
@SuppressWarnings("unused")
public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
@Override
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}
@Override
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}
}
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