org.transdroid.core.gui.navigation.SetLabelDialog.java Source code

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Here is the source code for org.transdroid.core.gui.navigation.SetLabelDialog.java

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/* 
 * Copyright 2010-2013 Eric Kok et al.
 * 
 * Transdroid 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.
 * 
 * Transdroid 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 Transdroid.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.transdroid.core.gui.navigation;

import java.security.InvalidParameterException;
import java.util.Iterator;
import java.util.List;

import org.transdroid.core.R;
import org.transdroid.core.gui.lists.SimpleListItem;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.EditText;
import android.widget.ListView;
import de.keyboardsurfer.android.widget.crouton.Crouton;

/**
 * A dialog fragment that allows picking a label or entering a new label to set this new label to the torrent.
 * @author Eric Kok
 */
public class SetLabelDialog extends DialogFragment {

    private OnLabelPickedListener onLabelPickedListener = null;
    private List<? extends SimpleListItem> currentLabels = null;

    public SetLabelDialog() {
        setRetainInstance(true);
    }

    /**
     * Sets the callback for when the user is has picked a label for the target torrent.
     * @param onLabelPickedListener The event listener to this dialog
     * @return This dialog, for method chaining
     */
    public SetLabelDialog setOnLabelPickedListener(OnLabelPickedListener onLabelPickedListener) {
        this.onLabelPickedListener = onLabelPickedListener;
        return this;
    }

    /**
     * Sets the list of currently known labels as are active on the server. These are offered to the user to pick a new
     * label for the target torrents.
     * @param currentLabels The list of torrent labels
     * @return This dialog, for method chaining
     */
    public SetLabelDialog setCurrentLabels(List<Label> currentLabels) {
        // Discard the empty label in this list before storing it locally
        for (Iterator<Label> iter = currentLabels.iterator(); iter.hasNext();) {
            if (iter.next().isEmptyLabel())
                iter.remove();
        }
        this.currentLabels = currentLabels;
        return this;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        if (onLabelPickedListener == null)
            throw new InvalidParameterException(
                    "Please first set the callback listener using setOnLabelPickedListener before opening the dialog.");
        if (currentLabels == null)
            throw new InvalidParameterException(
                    "Please first set the list of currently known labels before opening the dialog, even if the list is empty.");
        final View setlabelFrame = getActivity().getLayoutInflater().inflate(R.layout.dialog_setlabel, null, false);
        final ListView labelsList = (ListView) setlabelFrame.findViewById(R.id.labels_list);
        final EditText newlabelEdit = (EditText) setlabelFrame.findViewById(R.id.newlabel_edit);
        if (currentLabels.size() == 0) {
            // Hide the list (and its label) if there are no labels yet
            setlabelFrame.findViewById(R.id.pick_label).setVisibility(View.GONE);
            setlabelFrame.findViewById(R.id.line1).setVisibility(View.GONE);
            setlabelFrame.findViewById(R.id.line2).setVisibility(View.GONE);
            labelsList.setVisibility(View.GONE);
        } else {
            labelsList.setAdapter(new FilterListItemAdapter(getActivity(), currentLabels));
            labelsList.setOnItemClickListener(new OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                    onLabelPickedListener.onLabelPicked(((Label) labelsList.getItemAtPosition(position)).getName());
                    dismiss();
                }
            });
        }
        return new AlertDialog.Builder(getActivity()).setView(setlabelFrame)
                .setPositiveButton(R.string.status_update, new OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // User should have provided a new label
                        if (newlabelEdit.getText().toString().equals("")) {
                            Crouton.showText(getActivity(), R.string.error_notalabel,
                                    NavigationHelper.CROUTON_ERROR_STYLE);
                        }
                        onLabelPickedListener.onLabelPicked(newlabelEdit.getText().toString());
                    }
                }).setNeutralButton(R.string.status_label_remove, new OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        onLabelPickedListener.onLabelPicked(null);
                    }
                }).setNegativeButton(android.R.string.cancel, null).show();
    }

    public interface OnLabelPickedListener {
        public void onLabelPicked(String newLabel);
    }

}