package handy.swing;

import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.event.ChangeListener;
import javax.swing.event.ChangeEvent;

/**
   A JComponent that has a JSlider and a JTextField. Dragging the slider will update the text field and vice versa.
 */
public class SliderComponent extends JPanel {
    private JSlider slider;
    private JTextField text;

    /**
       Create a vertical SliderComponent with range bounds.
       @param min The minimum value of the slider.
       @param max The maximum value of the slider.
       @param value The current value of the slider.
     */
    public SliderComponent(int min, int max, int value) {
        this(min, max, value, SwingConstants.VERTICAL);
    }

    /**
       Create a SliderComponent with range bounds.
       @param min The minimum value of the slider.
       @param max The maximum value of the slider.
       @param value The current value of the slider.
       @param orientation The orientation of the slider. Must be either {@link javax.swing.SwingConstants#VERTICAL} or {@link javax.swing.SwingConstants#HORIZONTAL}
     */
    public SliderComponent(int min, int max, int value, int orientation) {
        this(new JSlider(orientation, min, max, value), new JTextField(String.valueOf(value)));
    }

    /**
       Create a SliderComponent with a given slider. If the slider has vertical orientation then the text field will be displayed below it, otherwise it will be to the right.
       @param slider The JSlider to display.
     */
    public SliderComponent(JSlider slider) {
        this(slider, new JTextField(String.valueOf(slider.getValue())));
    }

    /**
       Create a SliderComponent with a given slider and text field. If the slider has vertical orientation then the text field will be displayed below it, otherwise it will be to the right.
       @param slider The JSlider to display.
       @param text The JTextField to display.
     */
    public SliderComponent(JSlider slider, JTextField text) {
        super(new BorderLayout());
        setup(slider, text);
    }

    /**
       Get the JSlider component. This is useful if you want to manually set the tick marks etc.
       @return The JSlider component.
    */
    public JSlider getSlider() {
        return slider;
    }

    /**
       Get the JTextField component.
       @return The JTextField component.
    */
    public JTextField getTextField() {
        return text;
    }

    private void setup(final JSlider s, final JTextField t) {
        this.slider = s;
        this.text = t;
        add(slider, BorderLayout.CENTER);
        text.setText(String.valueOf(slider.getValue()));
        if (slider.getOrientation() == SwingConstants.VERTICAL) {
            add(text, BorderLayout.SOUTH);
        }
        else {
            add(text, BorderLayout.EAST);
        }
        text.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    try {
                        int i = Integer.parseInt(text.getText());
                        slider.setValue(i);
                    }
                    catch (NumberFormatException ex) {
                        // Ignore
                        ex.printStackTrace();
                    }
                }
            });
        slider.addChangeListener(new ChangeListener() {
                @Override
                public void stateChanged(ChangeEvent e) {
                    text.setText(String.valueOf(slider.getValue()));
                }
            });
    }
}