// -*- mode:java; encoding:utf-8 -*-

// vim:set fileencoding=utf-8:

// @homepage@

package example;

import java.awt.*;

import java.util.logging.Logger;

import javax.swing.*;

import javax.swing.text.Style;

import javax.swing.text.StyleConstants;

import javax.swing.text.StyleContext;

import javax.swing.text.TabSet;

import javax.swing.text.TabStop;

public final class MainPanel extends JPanel {

private MainPanel() {

super(new BorderLayout());

JCheckBox check = new JCheckBox("vertical grid lines", true);

check.addActionListener(e -> repaint());

JTextPane textPane = new JTextPane() {

@Override protected void paintComponent(Graphics g) {

super.paintComponent(g);

if (check.isSelected()) {

int ox = getInsets().left;

int h = getHeight();

g.setColor(Color.RED);

g.drawLine(ox, 0, ox, h);

g.drawLine(ox + 100, 0, ox + 100, h);

g.drawLine(ox + 200, 0, ox + 200, h);

g.drawLine(ox + 300, 0, ox + 300, h);

g.setColor(Color.ORANGE);

g.drawLine(ox + 50, 0, ox + 50, h);

g.drawLine(ox + 150, 0, ox + 150, h);

g.drawLine(ox + 250, 0, ox + 250, h);

}

}

};

textPane.setText(String.join("\n",

String.join("\t", "LEFT1", "CENTER1", "RIGHT1", "3.14"),

String.join("\t", "LEFT22", "CENTER22", "RIGHT22", "12.3"),

String.join("\t", "LEFT333", "CENTER333", "RIGHT333", "123.45"),

String.join("\t", "LEFT4444", "CENTER4444", "RIGHT4444", "0.9876")));

// MutableAttributeSet attr = new SimpleAttributeSet();

Style attr = textPane.getStyle(StyleContext.DEFAULT_STYLE);

StyleConstants.setTabSet(attr, new TabSet(new TabStop[] {

new TabStop(0f, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE),

new TabStop(100f, TabStop.ALIGN_CENTER, TabStop.LEAD_NONE),

new TabStop(200f, TabStop.ALIGN_RIGHT, TabStop.LEAD_NONE),

new TabStop(250f, TabStop.ALIGN_DECIMAL, TabStop.LEAD_NONE),

// new TabStop(300f, TabStop.ALIGN_BAR, TabStop.LEAD_NONE),

}));

textPane.setParagraphAttributes(attr, false);

// textPane.getStyledDocument().setParagraphAttributes(0, doc.getLength(), attr, false);

add(new JScrollPane(textPane));

add(check, BorderLayout.SOUTH);

setPreferredSize(new Dimension(320, 240));

}

public static void main(String[] args) {

EventQueue.invokeLater(MainPanel::createAndShowGui);

}

private static void createAndShowGui() {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (UnsupportedLookAndFeelException ignored) {

Toolkit.getDefaultToolkit().beep();

} catch (ClassNotFoundException | InstantiationException | IllegalAccessException ex) {

Logger.getGlobal().severe(ex::getMessage);

return;

}

JFrame frame = new JFrame("@title@");

frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

frame.getContentPane().add(new MainPanel());

frame.pack();

frame.setLocationRelativeTo(null);

frame.setVisible(true);

}

}