com.granita.tasks.utils.TasksListCursorAdapter.java Source code

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Here is the source code for com.granita.tasks.utils.TasksListCursorAdapter.java

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/*
 * Copyright (C) 2014 Marten Gajda <marten@dmfs.org>
 *
 * 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.
 * 
 */

package com.granita.tasks.utils;

import java.util.ArrayList;

import com.granita.android.widgets.ColoredShapeCheckBox;
import com.granita.provider.tasks.TaskContract;
import com.granita.tasks.R;

import android.content.Context;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Spinner;
import android.widget.TextView;

/**
 * An adapter to adapt a cursor containing task lists to a {@link Spinner}.
 * 
 * @author Tobias Reinsch <tobias@dmfs.org>
 */
public class TasksListCursorAdapter extends android.support.v4.widget.CursorAdapter {
    LayoutInflater mInflater;

    private int mTaskColorColumn;
    private int mTaskNameColumn;
    private int mAccountNameColumn;
    private int mIdColumn;
    private ArrayList<Long> mSelectedLists = new ArrayList<Long>(20);

    private SelectionEnabledListener mListener;

    public TasksListCursorAdapter(Context context) {
        super(context, null, 0 /* don't register a content observer to avoid a context leak! */);
        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public void setSelectionEnabledListener(SelectionEnabledListener listener) {
        mListener = listener;
    }

    @Override
    public Cursor swapCursor(Cursor c) {
        Cursor result = super.swapCursor(c);
        if (c != null) {
            mIdColumn = c.getColumnIndex(TaskContract.TaskListColumns._ID);
            mTaskColorColumn = c.getColumnIndex(TaskContract.TaskListColumns.LIST_COLOR);
            mTaskNameColumn = c.getColumnIndex(TaskContract.TaskListColumns.LIST_NAME);
            mAccountNameColumn = c.getColumnIndex(TaskContract.TaskListSyncColumns.ACCOUNT_NAME);

            c.moveToPosition(-1);
            mSelectedLists = new ArrayList<Long>(c.getCount());
            while (c.moveToNext()) {
                mSelectedLists.add(c.getLong(mIdColumn));
            }
        }
        return result;
    }

    @Override
    public void bindView(View v, Context context, Cursor c) {
        /* Since we override getView and get DropDownView we don't need this method. */
    }

    @Override
    public View newView(Context context, Cursor c, ViewGroup vg) {
        /* Since we override getView and get DropDownView we don't need this method. */
        return null;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        Cursor cursor = (Cursor) getItem(position);
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.list_item_selection, null);
        }

        TextView tvListName = (TextView) convertView.findViewById(android.R.id.text1);
        TextView tvAccountName = (TextView) convertView.findViewById(android.R.id.text2);
        final ColoredShapeCheckBox cBox = (ColoredShapeCheckBox) convertView.findViewById(android.R.id.checkbox);

        final String listName = cursor.getString(mTaskNameColumn);
        final String accountName = cursor.getString(mAccountNameColumn);
        final Long id = cursor.getLong(mIdColumn);

        tvListName.setText(listName);
        tvAccountName.setText(accountName);
        int taskListColor = cursor.getInt(mTaskColorColumn);
        cBox.setColor(taskListColor);
        cBox.setChecked(mSelectedLists.contains(id));

        // listen for checkbox
        convertView.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View view) {
                boolean isChecked = !cBox.isChecked();
                cBox.setChecked(isChecked);
                int oldSize = mSelectedLists.size();

                if (isChecked) {
                    if (!mSelectedLists.contains(id)) {
                        mSelectedLists.add(id);
                    }

                } else {
                    mSelectedLists.remove(id);
                }

                if (mListener != null) {
                    if (oldSize == 0 && mSelectedLists.size() > 0) {
                        mListener.onSelectionEnabled();
                    }
                    if (oldSize > 0 && mSelectedLists.size() == 0) {
                        mListener.onSelectionDisabled();
                    }
                }
            }
        });

        return convertView;
    }

    public ArrayList<Long> getSelectedLists() {
        return mSelectedLists;
    }

    /**
     * Listener that is used to notify if the select item count is > 0 or equal 0.
     * 
     * @author Tobias Reinsch <tobias@dmfs.org>
     * 
     */
    public interface SelectionEnabledListener {
        public void onSelectionEnabled();

        public void onSelectionDisabled();
    }
}