Method paintComponent

app/src/processing/app/ui/EditorHeader.java:154–265

(Graphics g)

  public void paintComponent(Graphics g) {
    if (g == null) return;
    Sketch sketch = editor.getSketch();
    if (sketch == null) return;  // is this even possible?

    g.setFont(font);  // need to set this each time through
    if (fontAscent == 0) {
      fontAscent = (int) Toolkit.getAscent(g);
    }

    Graphics2D g2 = Toolkit.prepareGraphics(g, false);

    /*
    Graphics2D g2 = (Graphics2D) g;

    if (!Toolkit.isRetina()) {
      g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                          RenderingHints.VALUE_ANTIALIAS_ON);
      g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                          RenderingHints.VALUE_INTERPOLATION_BICUBIC);
      g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
                          RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
//      g2.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
//                          RenderingHints.VALUE_FRACTIONALMETRICS_ON);
    }
    */

    g.drawImage(gradient, 0, 0, getWidth(), getHeight(), this);

    if (tabs.length != sketch.getCodeCount()) {
      tabs = new Tab[sketch.getCodeCount()];
      for (int i = 0; i < tabs.length; i++) {
        tabs[i] = new Tab(i);
      }
      visitOrder = new Tab[sketch.getCodeCount() - 1];
    }

    int leftover = TAB_BETWEEN + ARROW_TAB_WIDTH;
    int tabMax = getWidth() - leftover;

    // reset all tab positions
    for (Tab tab : tabs) {
      SketchCode code = sketch.getCode(tab.index);
      tab.textVisible = true;
      tab.lastVisited = code.lastVisited();

      tab.text = code.getFileName();
      // hide extensions for .pde files
      if (editor.getMode().hideExtension(code.getExtension())) {
        tab.text = code.getPrettyName();
        if (Preferences.getBoolean("sketch.name.replace_underscore")) {
          tab.text = tab.text.replace('_', ' ');
        }
      }

      tab.textWidth = (int)
        font.getStringBounds(tab.text, g2.getFontRenderContext()).getWidth();
    }