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/*
 * @(#)SIDV2librarian.java  beta1   2008/01/21
 *
 * Copyright (C) 2008    Rutger Vlek (rutgervlek@hotmail.com)
 *
 * This application 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 2 of the License, or
 * (at your option) any later version.
 *
 * This application 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 application; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


package org.midibox.sidedit.gui.controls;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;

import javax.swing.JPanel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

import org.midibox.sidedit.SIDSysexParameterControl;
import org.midibox.utils.gui.Knob;

public class SIDSysexParameterControlKnob extends SIDSysexParameterControlGUI
        implements ChangeListener, MouseWheelListener {

    public static float mouseWheelResolution = 0.1f;

    private Knob knob;

    public SIDSysexParameterControlKnob(SIDSysexParameterControl midiParameter,
            Knob knob, boolean showLabel, String labelLocation,
            boolean valueBelow, boolean showValue) {
        super(midiParameter, showLabel, labelLocation, valueBelow, showValue);
        this.knob = knob;

        JPanel panel = new JPanel(new FlowLayout(FlowLayout.CENTER, 0, 0));
        panel.setOpaque(false);
        panel.add(knob);

        knob.setMinimum(midiParameter.getMidiMinValue());
        knob.setMaximum(midiParameter.getMidiMaxValue());

        add(panel, BorderLayout.CENTER);
        knob.addChangeListener(this);
        knob.addMouseWheelListener(this);
        knob.addMouseListener(this);
        updateGraphics();
    }

    public void mouseWheelMoved(MouseWheelEvent mwe) {
        knob.setValue((int) (knob.getValue() - ((mwe.getWheelRotation() * Math
                .max(mouseWheelResolution
                        * (knob.getMaximum() - knob.getMinimum()), 1)))));
    }

    public void stateChanged(ChangeEvent ce) {
        if (update) {
            update = false;
            int newval;
            if (midiParameter.snap) {
                int index = (int) (((float) knob.getValue() / (float) knob
                        .getMaximum()) * (midiParameter.snapVals.length - 1));
                newval = midiParameter.snapVals[index];
            } else {
                newval = knob.getValue();
            }

            midiParameter.setMidiValue(newval, true);

            for (int c = 0; c < midiParameters.size(); c++) {
                SIDSysexParameterControl mp = (SIDSysexParameterControl) midiParameters
                        .elementAt(c);
                mp.setMidiValue(newval, false);
            }
            update = true;
        }
    }

    public void updateGraphics() {
        super.updateGraphics();
        if (update) {
            update = false;
            int newval;
            if (midiParameter.snap) {
                float ratio = (float) midiParameter.getMidiValSnapIndex()
                        / (float) (midiParameter.snapVals.length - 1);
                newval = (int) ((float) (knob.getMaximum() - knob.getMinimum()) * ratio);
            } else {
                newval = midiParameter.getMidiValue();
            }
            knob.setValue(newval);
            update = true;
        }
    }
}