src/org/sflphone/views/DoubleNumberPickerPreference.java

package org.sflphone.views;

/*
 * Copyright (C) 2011 The CyanogenMod Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.lang.reflect.Field;

import org.sflphone.R;

import android.content.Context;
import android.content.res.TypedArray;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.EditText;
import android.widget.NumberPicker;
import android.widget.TextView;

/*
 * @author Danesh
 * @author nebkat
 */

public class DoubleNumberPickerPreference extends DialogPreference {
    private int mMin1, mMax1, mDefault1;
    private int mMin2, mMax2, mDefault2;

    private String mMaxExternalKey1, mMinExternalKey1;
    private String mMaxExternalKey2, mMinExternalKey2;

    private String mPickerTitle1;
    private String mPickerTitle2;

    private NumberPicker mNumberPicker1;
    private NumberPicker mNumberPicker2;

    public DoubleNumberPickerPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TypedArray dialogType = context.obtainStyledAttributes(attrs,
        // com.android.internal.R.styleable.DialogPreference, 0, 0);
        TypedArray doubleNumberPickerType = context.obtainStyledAttributes(attrs, R.styleable.DoubleNumberPickerPreference, 0, 0);

        mMaxExternalKey1 = doubleNumberPickerType.getString(R.styleable.DoubleNumberPickerPreference_maxExternal1);
        mMinExternalKey1 = doubleNumberPickerType.getString(R.styleable.DoubleNumberPickerPreference_minExternal1);
        mMaxExternalKey2 = doubleNumberPickerType.getString(R.styleable.DoubleNumberPickerPreference_maxExternal2);
        mMinExternalKey2 = doubleNumberPickerType.getString(R.styleable.DoubleNumberPickerPreference_minExternal2);

        mPickerTitle1 = doubleNumberPickerType.getString(R.styleable.DoubleNumberPickerPreference_pickerTitle1);
        mPickerTitle2 = doubleNumberPickerType.getString(R.styleable.DoubleNumberPickerPreference_pickerTitle2);

        mMax1 = doubleNumberPickerType.getInt(R.styleable.DoubleNumberPickerPreference_max1, 5);
        mMin1 = doubleNumberPickerType.getInt(R.styleable.DoubleNumberPickerPreference_min1, 0);
        mMax2 = doubleNumberPickerType.getInt(R.styleable.DoubleNumberPickerPreference_max2, 5);
        mMin2 = doubleNumberPickerType.getInt(R.styleable.DoubleNumberPickerPreference_min2, 0);

        mDefault1 = doubleNumberPickerType.getInt(R.styleable.DoubleNumberPickerPreference_defaultValue1, mMin1);
        mDefault2 = doubleNumberPickerType.getInt(R.styleable.DoubleNumberPickerPreference_defaultValue2, mMin2);

        // dialogType.recycle();
        doubleNumberPickerType.recycle();
    }

    @Override
    protected View onCreateDialogView() {
        int max1 = mMax1;
        int min1 = mMin1;
        int max2 = mMax2;
        int min2 = mMin2;

        // External values
        if (mMaxExternalKey1 != null) {
            max1 = getSharedPreferences().getInt(mMaxExternalKey1, mMax1);
        }
        if (mMinExternalKey1 != null) {
            min1 = getSharedPreferences().getInt(mMinExternalKey1, mMin1);
        }
        if (mMaxExternalKey2 != null) {
            max2 = getSharedPreferences().getInt(mMaxExternalKey2, mMax2);
        }
        if (mMinExternalKey2 != null) {
            min2 = getSharedPreferences().getInt(mMinExternalKey2, mMin2);
        }

        LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.double_number_picker_dialog, null);

        mNumberPicker1 = (NumberPicker) view.findViewById(R.id.number_picker_1);
        mNumberPicker2 = (NumberPicker) view.findViewById(R.id.number_picker_2);

        if (mNumberPicker1 == null || mNumberPicker2 == null) {
            throw new RuntimeException("mNumberPicker1 or mNumberPicker2 is null!");
        }

        // Initialize state
        mNumberPicker1.setWrapSelectorWheel(false);
        mNumberPicker1.setMaxValue(max1);
        mNumberPicker1.setMinValue(min1);
        mNumberPicker1.setValue(getPersistedValue(1));
        mNumberPicker2.setWrapSelectorWheel(false);
        mNumberPicker2.setMaxValue(max2);
        mNumberPicker2.setMinValue(min2);
        mNumberPicker2.setValue(getPersistedValue(2));

        // Titles
        TextView pickerTitle1 = (TextView) view.findViewById(R.id.picker_title_1);
        TextView pickerTitle2 = (TextView) view.findViewById(R.id.picker_title_2);

        if (pickerTitle1 != null && pickerTitle2 != null) {
            pickerTitle1.setText(mPickerTitle1);
            pickerTitle2.setText(mPickerTitle2);
        }

        // No keyboard popup
        disableTextInput(mNumberPicker1);
        disableTextInput(mNumberPicker2);
        // EditText textInput1 = (EditText) mNumberPicker1.findViewById(com.android.internal.R.id.numberpicker_input);
        // EditText textInput2 = (EditText) mNumberPicker2.findViewById(com.android.internal.R.id.numberpicker_input);
        // if (textInput1 != null && textInput2 != null) {
        // textInput1.setCursorVisible(false);
        // textInput1.setFocusable(false);
        // textInput1.setFocusableInTouchMode(false);
        // textInput2.setCursorVisible(false);
        // textInput2.setFocusable(false);
        // textInput2.setFocusableInTouchMode(false);
        // }

        return view;
    }

    private int getPersistedValue(int value) {
        String[] values = getPersistedString(mDefault1 + "|" + mDefault2).split("\\|");
        if (value == 1) {
            try {
                return Integer.parseInt(values[0]);
            } catch (NumberFormatException e) {
                return mDefault1;
            }
        } else {
            try {
                return Integer.parseInt(values[1]);
            } catch (NumberFormatException e) {
                return mDefault2;
            }
        }
    }

    @Override
    protected void onDialogClosed(boolean positiveResult) {
        if (positiveResult) {
            persistString(mNumberPicker1.getValue() + "|" + mNumberPicker2.getValue());
            getOnPreferenceChangeListener().onPreferenceChange(this, mNumberPicker1.getValue()+""+mNumberPicker2.getValue());
        }
    }

    public void setMin1(int min) {
        mMin1 = min;
    }

    public void setMax1(int max) {
        mMax1 = max;
    }

    public void setMin2(int min) {
        mMin2 = min;
    }

    public void setMax2(int max) {
        mMax2 = max;
    }

    public void setDefault1(int def) {
        mDefault1 = def;
    }

    public void setDefault2(int def) {
        mDefault2 = def;
    }

    /*
     * reflection of NumberPicker.java verified in 4.1, 4.2
     */
    private void disableTextInput(NumberPicker np) {
        if (np == null)
            return;
        Class<?> classType = np.getClass();
        Field inputTextField;
        try {
            inputTextField = classType.getDeclaredField("mInputText");
            inputTextField.setAccessible(true);
            EditText textInput = (EditText) inputTextField.get(np);
            if (textInput != null) {
                textInput.setCursorVisible(false);
                textInput.setFocusable(false);
                textInput.setFocusableInTouchMode(false);
            }
        } catch (Exception e) {
            Log.d("trebuchet", "DoubleNumberPickerPreference disableTextInput error", e);
        }
    }

}