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package org.tela_botanica.client.composants;

import java.util.List;

import com.extjs.gxt.ui.client.event.Events;
import com.extjs.gxt.ui.client.event.FieldEvent;
import com.extjs.gxt.ui.client.widget.form.NumberField;
import com.google.gwt.event.dom.client.KeyCodes;

public class ChampNombre extends NumberField {
        
        public int lastKeyCode;
        public List<Character> allowed;
        
        @Override
    protected void onKeyDown( FieldEvent fe )
    {
        super.onKeyDown( fe ) ;
        int keyCode = fe.getKeyCode( ) ;

        if( keyCode == 0 )
        {
            keyCode = fe.getEvent( ).getCharCode( ) ;
        }

        _setLastKeyCode( keyCode ) ;
    }

    @Override
    protected void onKeyPress( FieldEvent fe )
    {
        fireEvent( Events.KeyPress, new FieldEvent( this, fe.getEvent( ) ) ) ;

        int keyCode = fe.getKeyCode( ) ;

        char key = ( char )keyCode ;

        if( keyCode == 0 )
        {
            key = ( char )fe.getEvent( ).getCharCode( ) ;
        }

        if( fe.isSpecialKey( _getLastKeyCode( ) ) 
           || _getLastKeyCode( ) == KeyCodes.KEY_BACKSPACE 
           || _getLastKeyCode( ) == KeyCodes.KEY_DELETE 
           || fe.isControlKey( ) )
        {
            return ;
        }

        if( !_getAllowed( ).contains( key ) )
        {
            fe.stopEvent( ) ;
        }
    }

    private native int _getLastKeyCode( ) /*-{
       return this.@org.tela_botanica.client.composants.ChampNombre::lastKeyCode ;
    }-*/;

    private native void _setLastKeyCode( int keycode ) /*-{
        this.@org.tela_botanica.client.composants.ChampNombre::lastKeyCode = keycode ;
    }-*/;

    private native List<Character> _getAllowed( ) /*-{
        return this.@org.tela_botanica.client.composants.ChampNombre::allowed ;
    }-*/;
};