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package net.sf.cuf.state.ui;

import net.sf.cuf.state.AbstractStateAdapter;
import net.sf.cuf.state.State;

import javax.swing.JTable;
import javax.swing.UIManager;

/**
 * A SwingJTableEnabledAdapter maps the enabeling/disabeling of the
 * monitored state to the enabeling/disabeling of a JTable.
 * Because the disabling of a JTable only disables the interaction,
 * we use additonal code to signal the user that the table is
 * disabled.
 */
public class SwingJTableEnabledAdapter extends AbstractStateAdapter
{
    /**
     * Create a new adapter with no state associated.
     */
    public SwingJTableEnabledAdapter()
    {
        super();
    }

    /**
     * Create a new adapter.
     * @param pState the state we adapt
     */
    public SwingJTableEnabledAdapter(final State pState)
    {
        super(pState);
    }

    /**
     * We don't need special treatment for the inital step, and
     * just call processStateChange().
     * @param pTarget the target we should adjust
     * @param pEnabled the state for the target
     */
    protected void adjustInitialState(final Object pTarget, final boolean pEnabled)
    {
        processStateChange(pTarget, pEnabled);
    }

    /**
     * We map the pEnabled boolean to the enabled/not enabled behaviour of a
     * JTable by disabling the table, settting the foreground color to the
     * disabled color of a combobox and setting the selection fore/background
     * color to the disabled for/background color of a combobox.
     * @param pTarget  target object, either a JComponent or a Action
     * @param pEnabled true if the target object should get "enabled"
     * @throws IllegalStateException if pTarget is not a JComponent or Action
     */
    protected void processStateChange(final Object pTarget, final boolean pEnabled)
    {
        if (pTarget instanceof JTable)
        {
            JTable table= (JTable) pTarget;
            // "standard" enablement
            table.setEnabled(pEnabled);

            if (pEnabled)
            {
                // enable
                table.setSelectionForeground(UIManager.getColor("Table.selectionForeground"));
                table.setSelectionBackground(UIManager.getColor("Table.selectionBackground"));
                table.setForeground         (UIManager.getColor("Table.foreground"));
                table.setBackground         (UIManager.getColor("Table.background"));
            }
            else
            {
                // disable
                table.setSelectionForeground(UIManager.getColor("ComboBox.disabledForeground"));
                table.setSelectionBackground(UIManager.getColor("ComboBox.disabledBackground"));
                table.setForeground         (UIManager.getColor("ComboBox.disabledForeground"));
                table.setBackground         (UIManager.getColor("ComboBox.disabledBackground"));
            }
        }
        else
        {
            // you can add any objects but we won't handle them ;-)
            throw new IllegalStateException("we cant handle that object:"+pTarget);
        }
    }

}