private void refreshDrawableDisplay() {
        contentTable.clear();
        
        if (drawables.size == 0) {
            Label label = new Label("No drawables have been added!", getSkin());
            if (atlasData.getDrawables().size > 0) {
                label.setText("No drawables match filter!");
            }
            contentTable.add(label);
        } else {
            if (MathUtils.isZero(zoomSlider.getValue())) {
                refreshDrawableDisplayDetail();
            } else {
                refreshDrawableDisplayNormal();
            }
        }
        if (showTipTVG) {
            dialogFactory.showTipTVG();
            showTipTVG = false;
        }
    }
Recreates the drawables array only including visible drawables.
core/src/com/ray3k/skincomposer/dialog/DialogDrawables.java