algorithms-for-computing-line-estimators/src/main/java/View/Panels/LMSPanel.java

package View.Panels;

import View.PlotDialog;
import com.sun.istack.internal.Nullable;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.TitledBorder;

/**
 * Implementierung verschiedener Algorithmen zur Berechnung von Ausgleichsgeraden.
 *
 * @Author: Armin Wolf
 * @Email: a_wolf28@uni-muenster.de
 * @Date: 02.06.2017.
 */
public class LMSPanel extends JPanel {


  private JLabel[] labels;
  private JTextField[] input;
  private JButton startButton;
  private JPanel continer;
  private JPanel northPanel;
  private JPanel centerPanel;
  private PlotDialog plotDialog;
  private GridBagConstraints gbc;

  public LMSPanel() {
    this.labels = new JLabel[2];
    this.input = new JTextField[2];
    this.setLayout(new BorderLayout());
    this.northPanel = new JPanel(new BorderLayout());
    this.centerPanel = new JPanel(new BorderLayout());
    this.northPanel.setBorder(new TitledBorder("Konfiguration"));
    this.centerPanel.setBorder(new TitledBorder("Visualisierung"));

    this.continer = new JPanel();
    this.continer.setLayout(new GridBagLayout());

    this.gbc = new GridBagConstraints();
    this.gbc.anchor = GridBagConstraints.NORTH;
    this.gbc.fill = GridBagConstraints.HORIZONTAL;

    addTextfieldAndInput(0, "Konstante", 0.5);
    addTextfieldAndInput(1, "Fehler", 0.05);

    this.startButton = new JButton("Start");
    this.startButton.setFont(new Font("Verdana",Font.PLAIN, 16));
    addButton(2, startButton);

    this.northPanel.add(continer, BorderLayout.CENTER);
    this.add(northPanel, BorderLayout.NORTH);
    this.add(centerPanel, BorderLayout.CENTER);
  }


  private void addTextfieldAndInput(int row, String name, Double value) {
    this.labels[row] = new JLabel(name);
    this.labels[row].setFont(new Font("SansSerif", Font.PLAIN, 12));
    this.input[row] = new JTextField();
    this.input[row].setText("" + value);

    gbc.insets = new Insets(0, 5, 0, 0);
    gbc.gridx = 0;
    gbc.gridy = row;
    gbc.weightx = 0.05;
    gbc.weighty = 0.05;
    continer.add(this.labels[row], gbc);

    gbc.gridx = 1;
    gbc.gridy = row;
    gbc.weightx = 0.9;
    gbc.weighty = 0.05;
    gbc.insets = new Insets(0, 0, 0, 5);
    continer.add(this.input[row], gbc);
  }

  private void addButton(int row, JButton button) {
    JPanel buttonPanel = new JPanel();
    buttonPanel.setLayout(new FlowLayout(FlowLayout.LEFT));

    gbc.insets = new Insets(30, 0, 5, 0);

    gbc.gridx = 0;
    gbc.gridy = row;
    gbc.weightx = 0.05;
    gbc.weighty = 0.05;
    gbc.gridwidth = 1;
    buttonPanel.add(button);
    continer.add(buttonPanel, gbc);
  }

  public JButton getStartButton() {
    return startButton;
  }

  @Nullable
  public String[] getInput() {
    String[] input = new String[3];
    input[0] = this.input[0].getText();
    input[1] = this.input[1].getText();

    if (isNumeric(input[0]) && isNumeric(input[1])){
      return input;
    } else {
      JOptionPane.showMessageDialog(null, "Bitte geben Sie numerische Werte als Parameter an.","Fehler bei der Eingabe", JOptionPane.ERROR_MESSAGE);
      return null;
    }

  }

  public void setInput(JTextField[] input) {
    this.input = input;
  }

  public PlotDialog getPlotDialog() {
    return plotDialog;
  }

  public void setPlotDialog(PlotDialog plotDialog) {
    this.plotDialog = plotDialog;
    if (this.centerPanel.getComponents().length > 0)
      this.centerPanel.remove(0);

    this.centerPanel.add(plotDialog, BorderLayout.CENTER);
    this.plotDialog.setVisible(true);
    this.repaint();
    this.revalidate();
  }

  public boolean isNumeric(String str) {
    try{
      double d = Double.parseDouble(str);
    }
    catch(NumberFormatException nfe){
      return false;
    }
    return true;
  }
}