protected void drawToolTipOutline(
DrawContext dc, double width, double height, ToolTipAttributes attributes) {
GL2 gl = dc.getGL();
this.applyColor(dc, attributes.getOutlineColor(), attributes.getOutlineOpacity());
gl.glLineWidth((float) getOutlineWidth());
// Draw a line loop around the background rectangle. Inset the lines slightly to compensate for
// OpenGL's line
// rasterization algorithm. We want the line to straddle the rectangle pixels.
double inset = 0.5;
gl.glBegin(GL2.GL_LINE_LOOP);
gl.glVertex2d(inset, inset);
gl.glVertex2d(width - inset, inset);
gl.glVertex2d(width - inset, height - inset);
gl.glVertex2d(inset, height - inset);
gl.glEnd();
}
