FilePickerIconAdapter.java

/*
 * Copyright 2010, 2011, 2012 mapsforge.org
 *
 * This program is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.oscim.android.filepicker;

import java.io.File;

import org.oscim.android.test.R;

import android.content.Context;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

/**
 * An adapter for the FilePicker GridView.
 */
class FilePickerIconAdapter extends BaseAdapter {
	private final Context mContext;
	private File mCurrentFile;
	private File[] mFiles;
	private boolean mHasParentFolder;
	private TextView mTextView;

	/**
	 * Creates a new FilePickerIconAdapter with the given context.
	 *
	 * @param context
	 *            the context of this adapter, through which new Views are
	 *            created.
	 */
	FilePickerIconAdapter(Context context) {
		super();
		mContext = context;
	}

	@Override
	public int getCount() {
		if (mFiles == null) {
			return 0;
		}
		return mFiles.length;
	}

	@Override
	public Object getItem(int index) {
		return mFiles[index];
	}

	@Override
	public long getItemId(int index) {
		return index;
	}

	@Override
	public View getView(int index, View convertView, ViewGroup parent) {
		if (convertView instanceof TextView) {
			// recycle the old view
			mTextView = (TextView) convertView;
		} else {
			// create a new view object
			mTextView = new TextView(mContext);
			mTextView.setLines(2);
			mTextView.setGravity(Gravity.CENTER_HORIZONTAL);
			mTextView.setPadding(5, 10, 5, 10);
		}

		if (index == 0 && mHasParentFolder) {
			// the parent directory of the current folder
			mTextView.setCompoundDrawablesWithIntrinsicBounds(0, R.drawable.file_picker_back, 0, 0);
			mTextView.setText("..");
		} else {
			mCurrentFile = mFiles[index];
			if (mCurrentFile.isDirectory()) {
				mTextView.setCompoundDrawablesWithIntrinsicBounds(0,
				                                                  R.drawable.file_picker_folder,
				                                                  0,
				                                                  0);
			} else {
				mTextView.setCompoundDrawablesWithIntrinsicBounds(0,
				                                                  R.drawable.file_picker_file,
				                                                  0,
				                                                  0);
			}
			mTextView.setText(mCurrentFile.getName());
		}
		return mTextView;
	}

	/**
	 * Sets the data of this adapter.
	 *
	 * @param files
	 *            the new files for this adapter.
	 * @param newHasParentFolder
	 *            true if the file array has a parent folder at index 0, false
	 *            otherwise.
	 */
	void setFiles(File[] files, boolean newHasParentFolder) {
		mFiles = files.clone();
		mHasParentFolder = newHasParentFolder;
	}
}