// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.client.widgets.datatables;

import com.google.gwt.gen2.table.client.SelectionGrid.*;
import com.google.gwt.user.client.ui.*;

public class RowSelectionPolicy {
    static enum Type {
        None, Single, Multi, CheckBox, Radio
    }

    public static final RowSelectionPolicy NONE = new RowSelectionPolicy();
    public static final RowSelectionPolicy SINGLE = new RowSelectionPolicy( Type.Single, SelectionPolicy.ONE_ROW );
    public static final RowSelectionPolicy MULTI = new RowSelectionPolicy( Type.Multi, SelectionPolicy.MULTI_ROW );
    public static final Column CHECKBOX = new Column( Type.CheckBox, SelectionPolicy.CHECKBOX, null );
    public static final Column RADIO = new Column( Type.Radio, SelectionPolicy.RADIO, null );

    private final Type mType;
    private final SelectionPolicy mSelectionPolicy;
    private final boolean mSelectionEnabled;

    /**
     * Special constructor for selection=none
     */
    private RowSelectionPolicy() {
        this( Type.None, null, false );
    }

    private RowSelectionPolicy( Type pType, SelectionPolicy pSelectionPolicy ) {
        this( pType, pSelectionPolicy, true );
    }

    private RowSelectionPolicy( Type pType, SelectionPolicy pSelectionPolicy, boolean pSelectionEnabled ) {
        mType = pType;
        mSelectionPolicy = pSelectionPolicy;
        mSelectionEnabled = pSelectionEnabled;
    }

    protected Type getType() {
        return mType;
    }

    boolean isSelectionEnabled() {
        return mSelectionEnabled;
    }

    SelectionPolicy getSelectionPolicy() {
        return mSelectionPolicy;
    }

    @Override
    public String toString() {
        return mType.name();
    }

    public static class Column extends RowSelectionPolicy {
        private final Widget mColLabel;

        private Column( Type pType, SelectionPolicy pSelectionPolicy, Widget pColLabel ) {
            super( pType, pSelectionPolicy );
            mColLabel = pColLabel;
        }

        Widget getColLabel() {
            return mColLabel;
        }

        public Column withLabel( String pColLabel ) {
            return withLabel( (pColLabel != null) ? new Label( pColLabel ) : null );
        }

        public Column withLabel( Widget pColLabel ) {
            return new Column( getType(), getSelectionPolicy(), pColLabel );
        }
    }
}