My child panels inherit their border width from their parent
Hi all,
I created a new Border (curved corners) using code that I found on these forums. Unfortunately, when I embed a child JPanel into a JPanel that is using this border, the child's border thickness becomes that of the parent's, even when the child's border thickness is explicitly set!
I don't have much experience creating my own borders, so it's possible that I've made a silly mistake.
Below is my source (self contained and excecutable). If you ran it you'd notice that the inner JPanel's border has a thickness of 10, even though it's been set to 1.
Any light you could shed on this problem would be great -- it's really screwing up my layout!
Thanks!
Sam
publicclass BorderTest{
public BorderTest(){
JPanel parent =new JPanel();
parent.setBorder(new EtchedRoundedBorder(EtchedRoundedBorder.RAISED, 50, 10));
JPanel child =new JPanel();
child.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
parent.add(child);
JFrame frame =new JFrame();
frame.setContentPane(parent);
frame.pack();
frame.setVisible(true);
}
publicstaticvoid main(String[] args){
BorderTest b =new BorderTest();
}
privateclass EtchedRoundedBorderimplements Border{
protectedint etchType, radius;
protectedfloat width;
protected Color highlight, shadow;
publicstaticfinalint RAISED = 0, LOWERED = 1;
public EtchedRoundedBorder(){
this(LOWERED, 20, 1f);
}
public EtchedRoundedBorder(int etchType,int radius,float width){
this(etchType, radius, Color.WHITE, Color.BLACK, width);
}
public EtchedRoundedBorder(int etchType, Color highlight, Color shadow,
float width){
this(etchType, 20, highlight, shadow, width);
}
public EtchedRoundedBorder(int etchType,int radius, Color highlight,
Color shadow,float width){
this.etchType = etchType;
this.radius = radius;
this.highlight = highlight;
this.shadow = shadow;
this.width = width;
}
publicvoid paintBorder(Component c, Graphics g,int x,int y,
int width,int height){
int w = width;
int h = height;
int r = radius;
Graphics2D g2 = (Graphics2D) g;
final BasicStroke stroke =new BasicStroke(this.width,
BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f);
g2.setStroke(stroke);
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g.translate(x, y);
if (etchType == LOWERED){
g.setColor(getShadowColor(c));
g.drawRoundRect(0, 0, w - 2, h - 2, 2 * r, 2 * r);
}
g.setColor(etchType == LOWERED ? getHighlightColor(c)
: getShadowColor(c));
g.drawLine(1, h - r - 2, 1, r + 1);
g.drawLine(r + 1, 1, w - r - 2, 1);
g.drawLine(r, h - 1, w - r - 1, h - 1);
g.drawLine(w - 1, h - r - 1, w - 1, r);
int ax = 1;
int ay = 1;
int arcSide = 2 * r;
int startAngle = 90;
int arcAngle = 90;
g.drawArc(ax, ay, arcSide, arcSide, startAngle, arcAngle);// nw
ax = 1;
ay = h - 2 * r - 1;
startAngle = 180;
g.drawArc(ax, ay, arcSide, arcSide, startAngle, arcAngle);// sw
ax = w - 2 * r - 1;
ay = h - 2 * r - 1;
startAngle = -90;
g.drawArc(ax, ay, arcSide, arcSide, startAngle, arcAngle);// se
ax = w - 2 * r - 1;
ay = 1;
startAngle = 0;
g.drawArc(ax, ay, arcSide, arcSide, startAngle, arcAngle);// ne
if (etchType == RAISED){
g.setColor(getHighlightColor(c));
g.drawRoundRect(0, 0, w - 2, h - 2, 2 * r, 2 * r);
}
g.translate(-x, -y);
}
public Insets getBorderInsets(Component c){
int d = (int) (radius * Math.cos(Math.PI / 4) + 2);
returnnew Insets(d, d, d, d);
}
public Insets getBorderInsets(Component c, Insets insets){
int d = (int) (radius * Math.cos(Math.PI / 4) + 2);
insets.left = insets.top = insets.right = insets.bottom = d;
return insets;
}
publicboolean isBorderOpaque(){
returnfalse;
}
publicint getEtchType(){
return etchType;
}
public Color getHighlightColor(Component c){
return highlight !=null ? highlight : c.getBackground().brighter();
}
public Color getHighLightColor(){
return highlight;
}
public Color getShadowColor(Component c){
return shadow !=null ? shadow : c.getBackground().darker();
}
public Color getShadowColor(){
return shadow;
}
}
}
