How to extract a CSS property from CSS file.

[ethanyhou]

Hi team, is there a way to extract a CSS property from a CSS file?

We want to apply a color to the GC of a Canvas. However, the GC doesn't support the setData API, and we can only use setBackground to apply color changes. To avoid hardcoding the color, we’d like to extract the color property directly from the CSS file.
Is there a way to achieve this?

Simple code snippet:

cardCanvas.addPaintListener(new PaintListener() {
      @Override
      public void paintControl(PaintEvent e) {
        GC gc = e.gc;
        // Get background color from stored data, fallback to canvas background
        // Color bgColor = null; // How to get a color from CSS file?
        gc.setBackground(bgColor);
        Rectangle bounds = cardCanvas.getBounds();
        gc.fillRoundRectangle(2, 2, bounds.width - 5, bounds.height - 5, 15, 15);
      }
    });

Appreciate it.

[vogella]

You can use CSS to set a color preference value and use it in your code. Example: https://www.vogella.com/tutorials/EclipseEditors/article.html#adding-colors-and-fonts-preferences