/*
* Geopaparazzi - Digital field mapping on Android based devices
* Copyright (C) 2016 HydroloGIS (www.hydrologis.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 eu.geopaparazzi.library.util;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.widget.Button;
import eu.geopaparazzi.library.R;
/**
* A dialog that permits multiple selection.
*
* @author Andrea Antonello (www.hydrologis.com)
*/
public class MultipleChoiceDialog {
private List<String> allSelected = new ArrayList<String>();
/**
* Open the dialog.
*
* @param context the {@link Context} to use.
* @param parentButton the parent {@link Button} that will be updated and contain
* the text of semicolon separated list of the selected items.
* @param items the items to be presented in the dialog.
*/
public void open( Context context, final Button parentButton, final String[] items ) {
String buttonString = parentButton.getText().toString();
if (!buttonString.equals("...")) { //$NON-NLS-1$
// we have values already
String[] split = buttonString.split(";"); //$NON-NLS-1$
Collections.addAll(allSelected, split);
}
boolean[] checkedValues = new boolean[items.length];
int count = items.length;
for( int i = 0; i < count; i++ )
checkedValues[i] = allSelected.contains(items[i]);
DialogInterface.OnMultiChoiceClickListener dialogListener = new DialogInterface.OnMultiChoiceClickListener(){
@Override
public void onClick( DialogInterface dialog, int which, boolean isChecked ) {
if (items[which].length() == 0) {
return;
}
if (isChecked) {
allSelected.add(items[which]);
} else {
allSelected.remove(items[which]);
}
StringBuilder sB = new StringBuilder();
for( CharSequence selected : allSelected )
sB.append(";" + selected); //$NON-NLS-1$
String buttonString = ""; //$NON-NLS-1$
if (sB.length() > 0) {
buttonString = sB.substring(1);
} else {
buttonString = "..."; //$NON-NLS-1$
}
parentButton.setText(buttonString);
}
};
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle(R.string.select_dotdot);
builder.setMultiChoiceItems(items, checkedValues, dialogListener);
AlertDialog dialog = builder.create();
dialog.show();
}
}