Adding custom icon to JscrollPane

Question

Hi,
I want to be able to add an icon to the lower left corner of a JScrollPane. I am aware of the method setCorner() however this will only work if there is already a row header present as well.
In my case, I want the left end of the viewport to be right against the left side of the scroll pane.
Is there anyway to do this?
A.F.

Answer 1

Hi,
I was able to get it to work.
Override ScrollPaneLayout.
     public class MyScrollPaneLayout extends ScrollPaneLayout
          public void layoutContainer(Container parent)
               super.layoutContainer(parent);
               if (lowerLeft != null)
                    JScrollPane scrollPane = (JScrollPane) parent;
                    Dimension componentDimension = lowerLeft.getPreferredSize();
                    Rectangle viewportBounds = scrollPane.getViewport().getBounds();
                    int componentWidth = Math.min(viewportBounds.width, componentDimension.width);
                    JScrollBar scrollBar = scrollPane.getHorizontalScrollBar();
                    Rectangle scrollBarBounds = scrollBar.getBounds();
                    lowerLeft.setBounds(viewportBounds.x, scrollBarBounds.y,
                              componentWidth, scrollBarBounds.height);
                    scrollBarBounds.width -= componentWidth;
                    scrollBarBounds.x += componentWidth;
                    scrollBar.setBounds(scrollBarBounds);
     }Set it on a scrollpane using setLayout().
e.g.
scrollpane.setLayout(new MyScrollPaneLayout());Then, use the setCorner method to set the lower left corner.
jsp.setCorner(JScrollPane.LOWER_LEFT_CORNER, myComponent);
Note:
This code is not internationalized, i.e. I made the assumption that the lower left corner is, in fact, in the lower left. For versions of Java where the component orientation is right to left (e.g. Hebrew), this code will have to be modified. See the superclass' code for details.
A.F.