package Blatt5;
 
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.GregorianCalendar;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
 
/**
 *
 * @author skiba1
 */
public class GUI {
 
    private static JLabel label1, label2;
    private static JButton button1, button2, button3;
    private static JFrame myFrame;
 
    public static void main(String args[]) {
        myFrame = new JFrame("CIP-Übung 5");
        myFrame.setLayout(null);
        myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        myFrame.setBounds(0, 0, 300, 250);
 
        label1 = new JLabel("Bitte auswählen: ");
        label1.setBounds(0, 0, 300, 15);
 
 
        button1 = new JButton("Aktuelles Datum");
        button1.setBounds(50, 20, 200, 20);
        button1.addActionListener(new ButtonListener());
 
        button2 = new JButton("Aktuelle Uhrzeit");
        button2.setBounds(50, 40, 200, 20);
        button2.addActionListener(new ButtonListener());
 
        button3 = new JButton("Semester?");
        button3.setBounds(50, 60, 200, 20);
        button3.addActionListener(new ButtonListener());
 
        label2 = new JLabel();
        label2.setBounds(10, 80, 180, 150);
        label2.setText("Giant Placeholder");
 
        myFrame.add(label1);
        myFrame.add(label2);
        myFrame.add(button1);
        myFrame.add(button2);
        myFrame.add(button3);
        myFrame.setVisible(true);
    }
 
    private static class ButtonListener implements ActionListener {
 
        GregorianCalendar now = new GregorianCalendar();
 
        @Override
        public void actionPerformed(ActionEvent e) {
            if (e.getSource() == button1) {
 
                DateFormat df = DateFormat.getDateInstance(DateFormat.LONG);
                label2.setText(df.format(now.getTime()));
 
            } else if (e.getSource() == button2) {
                DateFormat df = DateFormat.getTimeInstance(DateFormat.MEDIUM);
                label2.setText(df.format(now.getTime()));
 
            } else if (e.getSource() == button3) {
                int year = now.get(Calendar.YEAR);
                int month = now.get(Calendar.MONTH);
 
                if(month >= Calendar.APRIL && month < Calendar.OCTOBER){
                    label2.setText("Sommersemester " + year);
                }else{
                    if(month < Calendar.APRIL){
                        label2.setText("Wintersemester " + (year-1) +"/" + year);
                    }else{
                        label2.setText("Wintersemester " + year +"/" + (year+1));
                    }
                }
//                JOptionPane.showMessageDialog(myFrame, "Aus Kostengründen ist diese Funktion noch nicht implementiert", "Wir wollen mehr Geld!!! :-)", JOptionPane.INFORMATION_MESSAGE);
            }
        }
    }
}