org.worshipsongs.adapter.DragNDropCursorAdapter.java Source code

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Here is the source code for org.worshipsongs.adapter.DragNDropCursorAdapter.java

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/*
 * Copyright 2012 Terlici Ltd.
 *
 * 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 org.worshipsongs.adapter;

import android.content.Context;
import android.database.Cursor;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.View;
import android.view.ViewGroup;

/**
 * author:Madasamy
 * version:2.1.0
 */
public class DragNDropCursorAdapter extends SimpleCursorAdapter implements DragNDropAdapter {
    int mPosition[];
    int mHandler;

    public DragNDropCursorAdapter(Context context, int layout, Cursor cursor, String[] from, int[] to,
            int handler) {
        super(context, layout, cursor, from, to, 0);

        mHandler = handler;
        setup();
    }

    @Override
    public Cursor swapCursor(Cursor c) {
        Cursor cursor = super.swapCursor(c);

        mPosition = null;
        setup();

        return cursor;
    }

    private void setup() {
        Cursor c = getCursor();

        if (c == null || !c.moveToFirst())
            return;

        mPosition = new int[c.getCount()];

        for (int i = 0; i < mPosition.length; ++i)
            mPosition[i] = i;
    }

    @Override
    public View getDropDownView(int position, View view, ViewGroup group) {
        return super.getDropDownView(mPosition[position], view, group);
    }

    @Override
    public Object getItem(int position) {
        return super.getItem(mPosition[position]);
    }

    @Override
    public int getItemViewType(int position) {
        return super.getItemViewType(mPosition[position]);
    }

    @Override
    public long getItemId(int position) {
        return super.getItemId(mPosition[position]);
    }

    @Override
    public View getView(int position, View view, ViewGroup group) {
        return super.getView(mPosition[position], view, group);
    }

    @Override
    public boolean isEnabled(int position) {
        return super.isEnabled(mPosition[position]);
    }

    @Override
    public void onItemDrag(DragNDropListView parent, View view, int position, long id) {

    }

    @Override
    public void onItemDrop(DragNDropListView parent, View view, int startPosition, int endPosition, long id) {
        int position = mPosition[startPosition];

        if (startPosition < endPosition)
            for (int i = startPosition; i < endPosition; ++i)
                mPosition[i] = mPosition[i + 1];
        else if (endPosition < startPosition)
            for (int i = startPosition; i > endPosition; --i)
                mPosition[i] = mPosition[i - 1];

        mPosition[endPosition] = position;
    }

    @Override
    public int getDragHandler() {
        return mHandler;
    }

}