org.fife.ui.rtextarea.ChevronFoldIcon Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of rsyntaxtextarea Show documentation

RSyntaxTextArea is the syntax highlighting text editor for Swing applications. Features include syntax highlighting for 40+ languages, code folding, code completion, regex find and replace, macros, code templates, undo/redo, line numbering and bracket matching.

The newest version!

/*
 * This library is distributed under a modified BSD license.  See the included
 * LICENSE file for details.
 */
package org.fife.ui.rtextarea;

import java.awt.*;
import java.awt.geom.Path2D;


/**
 * A fold icon represented by a chevron.
 *
 * @author Robert Futrell
 * @version 1.0
 * @see PlusMinusFoldIcon
 */
class ChevronFoldIcon extends FoldIndicatorIcon {

	ChevronFoldIcon(boolean collapsed) {
		super(collapsed);
	}

	/**
	 * Creates a closed path for the given points.
	 */
	private Path2D createPath(double... points) {
		Path2D path = new Path2D.Float();
		path.moveTo(points[0], points[1]);
		for (int i = 2; i < points.length; i += 2) {
			path.lineTo(points[i], points[i + 1]);
		}
		path.closePath();
		return path;
	}

	@Override
	public int getIconHeight() {
		return 11;
	}

	@Override
	public int getIconWidth() {
		return 11;
	}

	@Override
	public void paintIcon(Component c, Graphics g, int x, int y) {

		FoldIndicator fi = (FoldIndicator)c;
		Color fg = c.getForeground();
		if (isArmed() && fi.getArmedForeground() != null) {
			fg = fi.getArmedForeground();
		}

		int width = getIconWidth();
		int height = getIconHeight();
		Graphics2D g2d = (Graphics2D)g.create();

		try {

			g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
				RenderingHints.VALUE_ANTIALIAS_ON);
			g2d.setColor(fg);
			g2d.translate(x, y);
			if (!isCollapsed()) {
				g2d.rotate(Math.toRadians(90), width / 2f, height / 2f);
			}
			g2d.fill(createPath(3, 1, 3, 2.5, 6, 5.5, 3, 8.5, 3, 10, 4.5, 10, 9, 5.5, 4.5, 1));
		} finally {
			g2d.dispose();
		}
	}

}