org.openswing.swing.client
Class ExpandableRowController
java.lang.Object
org.openswing.swing.client.ExpandableRowController
- public class ExpandableRowController
- extends java.lang.Object
Title: OpenSwing Framework
Description: controller used to manage row expansion in grid control.
Copyright: Copyright (C) 2006 Mauro Carniel
This file is part of OpenSwing Framework.
This library is free software; you can redistribute it and/or
modify it under the terms of the (LGPL) Lesser General Public
License as published by the Free Software Foundation;
GNU LESSER GENERAL PUBLIC LICENSE
Version 2.1, February 1999
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
The author may be contacted at:
maurocarniel@tin.it
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ExpandableRowController
public ExpandableRowController()
isRowExpandable
public boolean isRowExpandable(VOListTableModel model,
int rowNum)
- Parameters:
model
- grid modelrowNum
- the current row number
- Returns:
true
if the current row must be expanded, false
otherwise
getComponentToShow
public javax.swing.JComponent getComponentToShow(VOListTableModel model,
int rowNum)
- Parameters:
model
- grid modelrowNum
- the current row number
- Returns:
- JComponent to show when expanding row; null to do not show anything
removeShowedComponent
public boolean removeShowedComponent(VOListTableModel model,
int rowNum,
javax.swing.JComponent showedComponent)
- Parameters:
model
- grid modelrowNum
- the current row number that is just collapsedshowedComponent
- component to remove
- Returns:
true
to detach the component from internal cache; false
to store the collapsed component in cache
This callback method is automatically invoked when the component must be collapsed and can be used also
to perfom additional operations to correctly dispose the component.
When returned value is true
, the grid removes the component from cache, so reducing the amount of memory required by the application;
a drawback is that re-expansion of the same row requires to recreate the component, i.e. the invokation of "getComponentToShow" method again.
When returned value is false
, the grid mantains the component into its internal cache, this will increase
the amount of memory required by the application, but avoid to re-create the component for future expansions of the same row,
i.e. "getComponentToShow" method is not invoked twice for the same row.
getFocusableComponent
public java.awt.Component getFocusableComponent(javax.swing.JComponent showedComponent)
- Parameters:
showedComponent
- component currently showed
- Returns:
- component that will receive focus when showing frame; null to do not set focus automatically