Re: Comment trapper un evenement MouseEvent issu de javax.swing.plaf.basic.BasicTableUI$Handler

From:
 philippe.bodard@videotron.ca
Newsgroups:
comp.lang.java.programmer
Date:
Sun, 21 Oct 2007 07:10:01 -0700
Message-ID:
<1192975801.440610.3260@e9g2000prf.googlegroups.com>
On 21 oct, 02:15, Roedy Green <see_webs...@mindprod.com.invalid>
wrote:

On Sat, 20 Oct 2007 12:51:47 -0700, philippe.bod...@videotron.ca

Here is a translation based on my high school French and Babelfish..
Please take it with a large grain of salt:

Bonjour,
Dans un cas particulier , apres un clic dans une cellule g=E9r=E9e par
JTable , j'ai une exception issu du
handler de la table .
J'aimerai pourvoir etre capable de trapper cet evenement avant qu'il
soit pris en compte par le handler de la table


Good day.

In one particular case, after I click in a cell managed by JTable, I
am getting an exception originating in the JTable handler. I would
like to be able to intercept the event before it reaches the JTable
handler.

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
   at javax.swing.plaf.basic.BasicTableUI$Handler.mousePressed(Unknown
Source)
   at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
   at java.awt.Component.processMouseEvent(Unknown Source)
   at javax.swing.JComponent.processMouseEvent(Unknown Source)
   at java.awt.Component.processEvent(Unknown Source)
   at java.awt.Container.processEvent(Unknown Source)
   at java.awt.Component.dispatchEventImpl(Unknown Source)
   at java.awt.Container.dispatchEventImpl(Unknown Source)
   at java.awt.Component.dispatchEvent(Unknown Source)
   at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
   at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
   at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
   at java.awt.Container.dispatchEventImpl(Unknown Source)
   at java.awt.Window.dispatchEventImpl(Unknown Source)
   at java.awt.Component.dispatchEvent(Unknown Source)
   at java.awt.EventQueue.dispatchEvent(Unknown Source)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown
Source)
   at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown
Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.run(Unknown Source)

ci joint le source de la classe JTableModule qui gere la table
J'esperai trapper l'=E9v=E8nement via un MouseHandler que je rajoute =E0=

 ma

classe JTableModule .
Je le traite mais cependant malgr=E9 le dispose() , il est quand meme
pris en compte par le BasicTableUI$Handler
D'ou ma probl=E9matique .
Trapper cet =E9v=E8nement pour identifier pourquoi la source est invalide
avant qu,il soit pris en compte par BasicTableUI$Handler

Merci


Here is the source for the JTableModule class which control the table.
I hope it will intercept the event via a MouseHandler that I add
with my JTableModule class. I treat? it but however in spite of the
dispose(), it behaves the same way by BasicTableUI$Handler. It is
important to intercept this event to identify why the source is
invalid, before it is processed by BasicTableUI$Handler

Thanks

package terri.gui.table;

/*
@(#)JTableModule.java 1.17 07/10/26
*
*/

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import javax.swing.plaf.basic.BasicTableUI;

import terri.InvokerUI;
import terri.entities.*;
import terri.gui.MessageWindow;
import terri.managers.file.*;
import terri.utilities.*;

import java.lang.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.awt.event.*;
import java.awt.*;
import java.beans.*;

public class JTableModule extends JTable {

   JScrollPane scrollPane;
   TableColumn tableColumn0;

   final int columnWidth0 = 30;

   Logger logger;

   JTableModule jTableModule;

   TableColumnModel tableColumnModel;

   MouseListener[] mls;

   class MyTableUI extends BasicTableUI {

           public MouseInputListener createMouseInputListener() {

                   return mouseHandler;
           }

   }

   MyTableUI myTableUI;

   class MouseHandler extends MouseInputAdapter {

           public void mousePressed(MouseEvent e) {

                   logger.log(Level.INFO,"source =" + e.getSource().t=

oString());

                   if (!e.getComponent().isValid()) {
                   logger.log(Level.INFO,"Component Source invalid, evt
consumed");
                           e.consume();
                   }
                   else
                           super.mousePressed(e);
                   logger.log(Level.INFO,"Mouse pressed (# of clicks: "
                   + e.getClickCount() + ")");

       }

           public void mouseReleased(MouseEvent e) {

                   logger.log(Level.INFO,"source =" + e.getSource().t=

oString());

                   if (!e.getComponent().isValid()) {
                   logger.log(Level.INFO,"Component Source invalide, evt
consumed");
                   e.consume();
                   }
                   else
                           super.mouseReleased(e);
               logger.log(Level.INFO,"Mouse released (# of clicks: "
                   + e.getClickCount() + ")");

       }

   }

   MouseHandler mouseHandler;

   class ListSelectionModelTableModule extends DefaultListSelectionModel
{

           public boolean isSelectedIndex(int index) {
                   boolean result;
                   result=super.isSelectedIndex(index);
                   if (listSelectionColumnModel.getAnchorSelectionIndex=

() != 0) {

                           result=false;
                   }
// logger.log(Level.INFO,"isSelected (" + index + ") result ==

 " +

result);
                   return result;
           }

   }

   ListSelectionModelTableModule listSelectionRowModelTableModule;
   ListSelectionModel listSelectionColumnModel;

   //Default cell editor
   DefaultCellEditor cellEditor = new DefaultCellEditor(new
JTextField()) {
           public void cancelCellEditing() {
                   logger.log(Level.INFO,"cancel editing");
                   super.cancelCellEditing();
           }
           public boolean stopCellEditing() {
                   logger.log(Level.INFO,"stop editing");
                   return super.stopCellEditing();
           }

           public Component getTableCellEditorComponent(JTable table, O=

bject

value, boolean isSelected, int row, int column){
                   logger.log(Level.INFO,"getTableCellEditorComponent w=

ith value : " +

value + " row :" + row + " column :" + column);
                   return super.getTableCellEditorComponent(table, valu=

e, isSelected,

row,column);
           }

   };

   // Cell renderer used by column 0 with specifics background and
foreground colors.
   DefaultTableCellRenderer col0Renderer =
   new DefaultTableCellRenderer() {
           Color beige = new Color(245, 245, 220);
           public void setValue(Object value) {
           setBackground(beige);
                   setForeground(Color.black);
           super.setValue(value);
           }
   };

   public JTableModule(AbstractTableModel dataModel) {

           int indexMouseListener;

       //logger
       logger= Logger.getLogger("terri.gui.table.JTableModule");

       //set the common log file handler
           logger.addHandler(InvokerUI.getCommonLogFileHandler());

       //initialize the list , index of the model
           logger.log(Level.INFO,"new JTableModule");

       //Affect the tableModel
       setModel(dataModel);
       logger.log(Level.INFO,"setModel");

       //Column0 specifications
       specifyColumn0();
       logger.log(Level.INFO,"specifyColumn0");

       //specific editor
       //this.setCellEditor(cellEditor);

       putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
       logger.log(Level.INFO,"putClientProperty");

       //list selection model for excel selection row behavior
       jTableModule=this;
       tableColumnModel=this.getColumnModel();
       listSelectionColumnModel=tableColumnModel.getSelectionModel();
       listSelectionRowModelTableModule= new
ListSelectionModelTableModule();
       this.setSelectionModel(listSelectionRowModelTableModule);

       //selection behavior
       this.setRowSelectionAllowed(true);
       this.setCellSelectionEnabled(true);
       this.setColumnSelectionAllowed(false);

           //mouse Handler for TableUI
           //mouseHandler=new MouseHandler();
       //this.setUI(myTableUI);

       //trap mouse events for debugging
       /*
       mouseHandler=new MouseHandler();
       mls = (MouseListener[])
(this.getListeners(MouseListener.class));
       for (indexMouseListener=0;indexMouseListener<
mls.length;indexMouseListener++)
           this.removeMouseListener(mls[indexMouseListener]);
       this.addMouseListener(mouseHandler);
       */

       // Affect a scrollPane
       scrollPane = new JScrollPane(this);
       logger.log(Level.INFO,"fin new JTableModule");

   };

   public JScrollPane getScrollPane() { return scrollPane; }

   //render specifications for column 0
   private void specifyColumn0() {

           // max size and not resizable with gray color
       tableColumn0= this.getColumn(" ");
           tableColumn0.setMaxWidth(columnWidth0);
           tableColumn0.setResizable(false);
           tableColumn0.setCellRenderer(col0Renderer);

   }

   //special views behaviours to add
   public void tableChanged(TableModelEvent e ) {

           super.tableChanged(e);
   }

}


--
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Thank you very much Roedy for you translation
It explains very well my needs
I am waiting now for any idea to solve my problem
bye
Philip

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