Highlight entire JTree row on selection

• download example.jar
• download src.zip
• repository

Code

final Color SELC = new Color(100,150,200);
JTree tree = new JTree() {
  @Override public void paintComponent(Graphics g) {
    g.setColor(getBackground());
    g.fillRect(0,0,getWidth(),getHeight());
    if(getSelectionCount()>0) {
      for(int i: getSelectionRows()) {
        Rectangle r = getRowBounds(i);
        g.setColor(SELC);
        g.fillRect(0, r.y, getWidth(), r.height);
      }
    }
    super.paintComponent(g);
    if(getLeadSelectionPath()!=null) {
      Rectangle r = getRowBounds(getRowForPath(getLeadSelectionPath()));
      g.setColor(SELC.darker());
      g.drawRect(0, r.y, getWidth()-1, r.height-1);
    }
  }
};
tree.setUI(new javax.swing.plaf.basic.BasicTreeUI() {
  @Override public Rectangle getPathBounds(JTree tree, TreePath path) {
    if(tree != null && treeState != null) {
      return getPathBounds(path, tree.getInsets(), new Rectangle());
    }
    return null;
  }
  private Rectangle getPathBounds(TreePath path, Insets insets, Rectangle bounds) {
    bounds = treeState.getBounds(path, bounds);
    if(bounds != null) {
      bounds.width = tree.getWidth();
      bounds.y += insets.top;
    }
    return bounds;
  }
});
tree.setOpaque(false);

References

• TreeRowSelection(Japanese)

Translucent JInternalFrame (Nimbus)

• download example.jar
• download src.zip
• repository

Code

class MySynthStyleFactory extends SynthStyleFactory {
  private SynthStyleFactory wrappedFactory;
  public MySynthStyleFactory(SynthStyleFactory factory) {
    this.wrappedFactory = factory;
  }
  public SynthStyle getStyle(JComponent c, Region id) {
    SynthStyle s = wrappedFactory.getStyle(c, id);
    //if(id==Region.INTERNAL_FRAME_TITLE_PANE||id==Region.INTERNAL_FRAME) {
    if(id==Region.INTERNAL_FRAME) {
      s = new TranslucentSynthSytle(s);
    }
    return s;
  }
}
class TranslucentSynthSytle extends SynthStyle {
  private final SynthStyle style;
  public TranslucentSynthSytle(SynthStyle s) {
    style = s;
  }
  public SynthPainter getPainter(final SynthContext context) {
    return new SynthPainter() {
      public void paintInternalFrameBackground(SynthContext context,
                           Graphics g, int x, int y, int w, int h) {
        g.setColor(new Color(100,200,100,100));
        g.fillRoundRect(x,y,w-1,h-1,15,15);
      }
    };
  }
  public boolean isOpaque(SynthContext context) {
    if(context.getRegion()==Region.INTERNAL_FRAME) {
      return false;
    }else{
      return style.isOpaque(context);
    }
  }
  public Color getColorForState(SynthContext context, ColorType type) {
    return null; //Color.RED;
  }
  public Font getFontForState(SynthContext context) {
    return null; //new Font("MONOSPACE", Font.ITALIC, 24);
  }
  //...

References

• TranslucentFrame(Japanese)
• TransparentFrame(Japanese)