Bounds of a String

[Peter Ahrens]

I will draw a rectangle with a string inside. Now I need the bounds of a
given string to get size of the rectangle. How can I get the bounds of a
String? I have found getStringBounds of Font. But the function needs a
FontRenderContext? Where can I get the FontRenderContext?

My function at the moment:

public void Draw(Graphics g)
{
g.setColor(Color.BLUE);

// g.getFont().getStringBounds(text, )
// g.drawString(text);

g.drawRect(10, 10, 20, 30);
}

Peter

 

[Andrey Kuznetsov]

I will draw a rectangle with a string inside. Now I need the bounds of a

given string to get size of the rectangle. How can I get the bounds of a
String? I have found getStringBounds of Font. But the function needs a
FontRenderContext? Where can I get the FontRenderContext?

better you use getStringBounds from FontMetrics

 

[Peter Ahrens]

better you use getStringBounds from FontMetrics

Okay, I try following

public void Draw(Graphics g){

g.setColor(Color.BLUE);
Rectangle2D rec = g.getFontMetrics().getStringBounds(title, g);
g.drawRect(rec.OUT_LEFT, rec.OUT_TOP, rec.OUT_RIGHT - rec.OUT_LEFT,
rec.OUT_BOTTOM - rec.OUT_TOP);
g.drawString(title, rec.OUT_LEFT, rec.OUT_TOP);
}

but this draws nothing. What's wrong?

Peter

 

[klynn47]

I'm not sure, but I think you're problem may have to do with the
baseline of the String. The coordinates in drawString indicate the
baseline of where the String will be drawn

 

[Andrey Kuznetsov]

public void Draw(Graphics g){

g.setColor(Color.BLUE);
Rectangle2D rec = g.getFontMetrics().getStringBounds(title, g);
g.drawRect(rec.OUT_LEFT, rec.OUT_TOP, rec.OUT_RIGHT - rec.OUT_LEFT,
rec.OUT_BOTTOM - rec.OUT_TOP);

;-)

g.drawRect(rec.x, rec.y, rec.width, rec.height);
g.drawString(title, rec.x, rec.y + rec.height);

 

[Peter Ahrens]

;-)

g.drawRect(rec.x, rec.y, rec.width, rec.height);
g.drawString(title, rec.x, rec.y + rec.height);

Where do you found x, y width and height in a Rectangle2D class? From
'g.getFontMetrics().getStringBounds(title, g);' do you get a Rectangle2D
class!

Peter

 

[Andrey Kuznetsov]

Where do you found x, y width and height in a Rectangle2D class? From

'g.getFontMetrics().getStringBounds(title, g);' do you get a Rectangle2D
class!

Recatangle2D is abstract class.
Subclasses of Recatangle2D are Rectangle, Rectangle2D.Float and
Rectangle2D.Double.
they all have this fields.

you can use methods getX(), getY(), getWidth() and getHeight() (comes from
RectangularShape)

you can use Recatangle2D#getBounds() to get Rectangle