Method paintComponent

app/src/processing/app/EditorHeader.java:196–290

(Graphics screen)

  public void paintComponent(Graphics screen) {
    if (screen == null) return;

    SketchController sketch = editor.getSketchController();
    if (sketch == null) return;  // ??

    Dimension size = getSize();
    if ((size.width != sizeW) || (size.height != sizeH)) {
      // component has been resized

      if ((size.width > imageW) || (size.height > imageH)) {
        // nix the image and recreate, it's too small
        offscreen = null;

      } else {
        // who cares, just resize
        sizeW = size.width;
        sizeH = size.height;
      }
    }

    if (offscreen == null) {
      sizeW = size.width;
      sizeH = size.height;
      imageW = sizeW;
      imageH = sizeH;
      offscreen = createImage(imageW, imageH);
    }

    Graphics2D g = Theme.setupGraphics2D(offscreen.getGraphics());
    if (font == null) {
      font = Theme.getFont("header.text.font");
    }
    g.setFont(font);  // need to set this each time through
    metrics = g.getFontMetrics();
    fontAscent = metrics.getAscent();

    // set the background for the offscreen
    g.setColor(backgroundColor);
    g.fillRect(0, 0, imageW, imageH);

    List<EditorTab> tabs = editor.getTabs();

    int codeCount = tabs.size();
    if ((tabLeft == null) || (tabLeft.length < codeCount)) {
      tabLeft = new int[codeCount];
      tabRight = new int[codeCount];
    }

    int x = scale(6); // offset from left edge of the component
    int i = 0;
    for (EditorTab tab : tabs) {
      SketchFile file = tab.getSketchFile();
      String filename = file.getPrettyName();

      // if modified, add the li'l glyph next to the name
      String text = "  " + filename + (file.isModified() ? " \u00A7" : "  ");