Java Draw String vertikal ⇐ Java

[Anonymous]

Ich versuche, in einem bestimmten Rechteck in Paintcomponent -Saiten zu malen, so dass der Beginn des Textes am vertikalen Rand des Rechtecks ​​. Die Idee ist, den Text um sein Mitte zu drehen. Hier ist mein einfaches Testprogramm, das die Saiten, aber mit einer seltsamen Lücke vor dem Text < /strong>. /p>

Code: Select all

import javax.swing.*;
import java.awt.*;

public class TestLabel {
public static Font font = new Font("Serif", Font.PLAIN, 40);

public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
new TestLabel(args);
}
});
}

public TestLabel(String[] args) {
JFrame mainFrame = new JFrame();
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setBounds(30, 200, 600, 900);
JPrefPanel jPanel = new JPrefPanel();
Container mainContainer = mainFrame.getContentPane();
mainContainer.setLayout(new BoxLayout(mainContainer, BoxLayout.X_AXIS));
mainFrame.add(jPanel);
mainFrame.setState(Frame.NORMAL);
mainFrame.setVisible(true);
}

public class JPrefPanel extends JPanel {
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);

Graphics2D g2d = (Graphics2D) g;
Rectangle r;
//            r = new Rectangle(100, 40, 40, 300);
//            r = new Rectangle(100, 40, 40, 400);
//            r = new Rectangle(100, 40, 60, 400);
//            r = new Rectangle(100, 40, 80, 400);
r = new Rectangle(100, 40, 80, 300);
//            r = new Rectangle(100, 40, 20, 400);
//            r = new Rectangle(100, 40, 40, 300);

drawLabel(g2d, "a string", -Math.PI / 2, r);
r.x += 200;
drawLabel(g2d, "a string", Math.PI / 2, r);
}

private void drawLabel(Graphics g, String text, double rotation, Rectangle r) {
final int AXIS_OFFSET = 20;
final int TOP_BUFFER = 30; // where additional text is drawn

int chartwidth, chartheight, chartX, chartY;

chartheight = r.height - 2 * AXIS_OFFSET - TOP_BUFFER;
chartY = r.height - AXIS_OFFSET;

Graphics2D g2d = (Graphics2D)g.create();
Rectangle bounds = this.getBounds();
g2d.setFont(font);
FontMetrics fontMetrics = g2d.getFontMetrics();
int textHeight = fontMetrics.getHeight();
int textWidth = fontMetrics.stringWidth(text);

int x0 = r.x + r.width / 2;
int y0 = r.y + r.height / 2;

// axes
g2d.drawLine( x0, bounds.y, x0, bounds.y + bounds.width);
g2d.drawLine( bounds.x, y0, bounds.x + bounds.height, y0);

g2d.drawRect(r.x, r.y, r.width, r.height);  // vertical

g2d.rotate(rotation, x0, y0);
g2d.drawString(text, r.x, y0);
//            g2d.drawString(text, r.x, y0 + fontMetrics.getDescent());
g2d.drawString(text, x0 - textWidth / 2, y0 + fontMetrics.getDescent());
g2d.dispose();
r
}
}
}

Hier ist, was ich sehe < /p>
Geschriebene Testprogramm, ausprobierte verschiedene Größen, Schriftarten. Kein gutes Ergebnis.