JTable表格融合

Swing JTable融合效果

 1) JSTable  extenends JTable， 重载rowAtPoint/columnAtPoint/getCellRect，覆盖被融合的部分

2) JSTableUI extends BasicTableUI，处理paintCell如下

private   void  paintCell(Graphics g, Rectangle cellRect,  int  row,  int  column)  ... {
        //定位为leading cell
        MergeBlock mb=((JSTable)table).getMergeBlockManager().getMergeBlockOwner(row, column);
        if(mb!=null )...{
            if(mb.getC1()!=column && mb.getR1()!=row)...{
                return;
            }else...{
                row=mb.getR1();
                column=mb.getC1();
            }
        }
        cellRect=table.getCellRect(row, column, false);
        if (table.isEditing() && table.getEditingRow() == row
                && table.getEditingColumn() == column) ...{
            Component component = table.getEditorComponent();
            component.setBounds(cellRect);
            component.validate();
        } else ...{
            //清除背景(格线)
             Color c = g.getColor(); 
             g.setColor(table.getBackground());
             g.fillRect(cellRect.x,cellRect.y,cellRect.width,cellRect.height);
             g.setColor(c);
             
            TableCellRenderer renderer = table.getCellRenderer(row, column);
            Component component = table.prepareRenderer(renderer, row, column);
            rendererPane.paintComponent(g, component, table, cellRect.x,
                    cellRect.y, cellRect.width, cellRect.height, true);
        }
    }