afreechart/src/main/java/org/afree/chart/block/EmptyBlock.java
/**
     * Draws the block within the specified area.  Since the block is empty,
     * there is nothing to draw except the optional border.
     *
     * @param canvas  the graphics device.
     * @param area  the area.
     * @param params  ignored (<code>null</code> permitted).
     *
     * @return Always <code>null</code>.
     */
Draws the block within the specified area.  Since the block is empty,
there is nothing to draw except the optional border.

@param canvas  the graphics device.
@param area  the area.
@param params  ignored (null permitted).

@return Always null.
Draws the block within the specified area . Since the block is empty there is nothing to draw except the optional border . @param canvas the graphics device . @param area the area . @param params ignored ( null permitted ) . @return Always null .
public Object draw(Canvas canvas, RectShape area, Object params) {
        area = trimMargin(area);
        drawBorder(canvas, area);
        return null;
    }
public Object draw ( Canvas canvas , RectShape area , Object params ) { area = trimMargin ( area ) ; drawBorder ( canvas , area ) ; return null ; }
Draws the block within the specified area.
Draws the block within the specified area .