Tutorial

Tutorial

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Step by Step

Create an usual java lightweight component and implement LightweightInterface.

class MyLightweight extends java.awt.Component 
          implements LightweightInterface {

Keep track of the Figue parent.

public MyLightweight() {
 ...
 _parent = null;
 ...
}

  private LightweightComponentAdapter _parent;

public void setParent(LightweightComponentAdapter aGlyph) {
   _parent = aGlyph;
}

Delegate the invalidate task to Figue.

public void invalidate() {
  if ( _parent != null ) {
     _parent.invalidate();
  }
}

Delegate the repaint task to Figue.

public void repaint() {
  if ( _parent != null ) {
     _parent.refresh();
  }
}

Use the current awt font and color as usual.

public void update(Graphics g) {
   ...
   g.setColor(getForeground());
   g.fillArc(0, 0, s, s, 0, 360);
   g.drawArc(0, 0, s, s, 0, 360);

Use the current awt font metric as usual.

public java.awt.Dimension getPreferredSize() {
  Font f = getFont();
  if(f != null) {

Return the expected alignment as usual.

public float getAlignmentX() {
   ...
}
public float getAlignmentY() {

Insert the lightweight component in an adapter.

LightweightInterface theLightweight = new MyLightweight();
theLine.addChild(
   new LightweightComponentAdapter(theLightweight));
theLine.addChild(Atom.newAtom(aText));