com.nextgis.mobile.util.SelectMapPathPreference.java Source code

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Here is the source code for com.nextgis.mobile.util.SelectMapPathPreference.java

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/*
 * Project:  NextGIS Mobile
 * Purpose:  Mobile GIS for Android.
 * Author:   Dmitry Baryshnikov (aka Bishop), bishop.dev@gmail.com
 * Author:   NikitaFeodonit, nfeodonit@yandex.com
 * Author:   Stanislav Petriakov, becomeglory@gmail.com
 * ****************************************************************************
 * Copyright (c) 2012-2017 NextGIS, info@nextgis.com
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.nextgis.mobile.util;

import android.content.Context;
import android.content.res.TypedArray;
import android.support.v4.app.FragmentManager;
import android.support.v7.preference.Preference;
import android.text.TextUtils;
import android.util.AttributeSet;
import com.nextgis.libngui.dialog.LocalResourceSelectDialog;
import com.nextgis.libngui.util.ConstantsUI;

import java.io.File;

/**
 * A dialog to select map path from settings
 */
public class SelectMapPathPreference extends Preference implements LocalResourceSelectDialog.OnSelectionListener {
    protected String mText;

    protected FragmentManager mFragmentManager;
    protected OnAttachedListener mOnAttachedListener;

    public SelectMapPathPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public void onAttached() {
        super.onAttached();

        if (null != mOnAttachedListener) {
            mFragmentManager = mOnAttachedListener.getFragmentManagerFromParentFragment();
        }
    }

    @Override
    protected void onClick() {
        super.onClick();

        Context context = getContext();
        File path = context.getExternalFilesDir(null);
        if (null == path) {
            path = context.getFilesDir();
        }

        LocalResourceSelectDialog dialog = new LocalResourceSelectDialog();
        dialog.setPath(path);
        dialog.setTypeMask(ConstantsUI.FILETYPE_FOLDER);
        dialog.setCanSelectMultiple(false);
        dialog.setOnSelectionListener(this);
        dialog.show(mFragmentManager, ConstantsUI.FRAGMENT_SELECT_RESOURCE);
    }

    @Override
    public void onSelection(File file) {
        String value = file.getAbsolutePath();
        if (callChangeListener(value)) {
            setText(value);
            setSummary(value);
        }
    }

    /**
     * Saves the text to the {@link android.content.SharedPreferences}.
     *
     * @param text
     *         The text to save
     */
    public void setText(String text) {
        final boolean wasBlocking = shouldDisableDependents();
        mText = text;
        persistString(text);
        final boolean isBlocking = shouldDisableDependents();
        if (isBlocking != wasBlocking) {
            notifyDependencyChange(isBlocking);
        }
    }

    /**
     * Gets the text from the {@link android.content.SharedPreferences}.
     *
     * @return The current preference value.
     */
    public String getText() {
        return mText;
    }

    @Override
    public boolean shouldDisableDependents() {
        return TextUtils.isEmpty(mText) || super.shouldDisableDependents();
    }

    @Override
    protected Object onGetDefaultValue(TypedArray a, int index) {
        return a.getString(index);
    }

    @Override
    protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
        setText(restoreValue ? getPersistedString(mText) : (String) defaultValue);
    }

    public void setOnAttachedListener(OnAttachedListener onAttachedListener) {
        mOnAttachedListener = onAttachedListener;
    }

    public interface OnAttachedListener {
        FragmentManager getFragmentManagerFromParentFragment();
    }
}