package com.horstmann.violet.application.swingextension;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Polygon;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.geom.Area;
import java.awt.geom.RoundRectangle2D;
import javax.swing.border.AbstractBorder;
/**
* Found on the web, then modified
*
* @author http://stackoverflow.com/questions/15025092/border-with-rounded-corners-transparency
*
*/
public class TextBubbleBorder extends AbstractBorder
{
private Color color;
private int thickness = 4;
private int radii = 8;
private int pointerSize = 7;
private Insets insets = null;
private BasicStroke stroke = null;
private int strokePad;
private int pointerPad = 4;
private boolean left = true;
RenderingHints hints;
public TextBubbleBorder(Color color)
{
new TextBubbleBorder(color, 4, 8, 7);
}
public TextBubbleBorder(Color color, int thickness, int radii, int pointerSize)
{
this.thickness = thickness;
this.radii = radii;
this.pointerSize = pointerSize;
this.color = color;
stroke = new BasicStroke(thickness);
strokePad = thickness / 2;
hints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
int pad = radii + strokePad;
int bottomPad = pad + pointerSize + strokePad;
insets = new Insets(pad, pad, bottomPad, pad);
}
public TextBubbleBorder(Color color, int thickness, int radii, int pointerSize, boolean left)
{
this(color, thickness, radii, pointerSize);
this.left = left;
}
@Override
public Insets getBorderInsets(Component c)
{
return insets;
}
@Override
public Insets getBorderInsets(Component c, Insets insets)
{
return getBorderInsets(c);
}
@Override
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height)
{
Graphics2D g2 = (Graphics2D) g;
int bottomLineY = height - thickness - pointerSize;
RoundRectangle2D.Double bubble = new RoundRectangle2D.Double(0 + strokePad, 0 + strokePad, width - thickness, bottomLineY,
radii, radii);
Polygon pointer = new Polygon();
if (left)
{
// left point
pointer.addPoint(strokePad + radii + pointerPad, bottomLineY);
// right point
pointer.addPoint(strokePad + radii + pointerPad + pointerSize, bottomLineY);
// bottom point
pointer.addPoint(strokePad + radii + pointerPad + (pointerSize / 2), height - strokePad);
}
else
{
// left point
pointer.addPoint(width - (strokePad + radii + pointerPad), bottomLineY);
// right point
pointer.addPoint(width - (strokePad + radii + pointerPad + pointerSize), bottomLineY);
// bottom point
pointer.addPoint(width - (strokePad + radii + pointerPad + (pointerSize / 2)), height - strokePad);
}
Area area = new Area(bubble);
area.add(new Area(pointer));
g2.setRenderingHints(hints);
// Paint the BG color of the parent, everywhere outside the clip
// of the text bubble.
Component parent = c.getParent();
if (parent != null)
{
Color bg = parent.getBackground();
Rectangle rect = new Rectangle(0, 0, width, height);
Area borderRegion = new Area(rect);
borderRegion.subtract(area);
g2.setClip(borderRegion);
g2.setColor(bg);
g2.fillRect(0, 0, width, height);
g2.setClip(null);
}
g2.setColor(color);
g2.setStroke(stroke);
g2.draw(area);
}
}