Dynamically Rendering and editing JTable cell
Hi all,
I wonder if some body can help me.
As in my application each cell in Jtable returns java Object. and what i am trying to do is based on each object returned in cell my renderer is going to change dynamically. for example if the object returned is primitive data types the renderer is defualt, if the returned object is Map, Set or List, then the Cell Renderer should show clickable button with icon on right hand side and TextField on left hand side and so on for other objects. i am able get renderer for Map, set or list, which is button on right hand side of cell and text field on left hand side displaying toString of Object. then what i want is when i click button it should show those values in popup window and if i double click it should edit the cell which i am able to do it. so how can i handle events or what i have to do to make button clickable. if any body come accross these situations or got idea. please let me know how to move further.
Thanks,
Kotesh.
Hi,
Thanks for your advise and as i said i am able to get render for Map as (TextField in left hand side+Button with icon in right hand side side) of Cell. but what i need is when i click button which is on right hand, then i should be able to show popup wvindow with map values and if i double click on TextField which is on right hand side, then i should be able to edit Cell which is happening. but i am not able to get popup window when i click button on right hand side of cell. basically i am not sure how to handle events on cell and the button on right hand side?
if some one can guide me that will be great as i am in big trouble.
Thanks
Kotesh.
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package com.itrsgroup.swing.componentmanager.dockablemanager;
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import java.awt.Component;
import java.awt.Font;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
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editor.setVerticalTextPosition( SwingConstants.TOP );
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editor.setVerticalAlignment( SwingConstants.CENTER );
editor.setFont( font );
editor.addItemListener( this );
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ActiveCheckBoxRendererEditor cbc = new ActiveCheckBoxRendererEditor("Active", "Inactive");
TableColumn
activeColumn = this.getColumnModel().getColumn( 3 );
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activeColumn.setCellRenderer( cbc );
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activeColumn.setMaxWidth( 200 );
activeColumn.setMinWidth( 80 );thanks
AhmedIs the column editable?
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-user $UID -o ! -perm -600 \)' '.??* -path .Trash -prune -o -type d -name *.app -print -prune' '-c Print\ :'${p[35]}' 2>&1' '-c Print\ :Label 2>&1' '{/,}L*/{Con,Pref}* -type f ! -size 0 -name *.plist -exec plutil -s {} \;' "-f'%N: %l' Desktop L*/Keyc*" therm sysload boot-args status " -F '\$Time \$Message' -k Sender kernel -k Message Req 'Beac|caug|dead[^bl]|FAIL|GPU |hfs: Ru|inval|jnl:|last value [1-9]|n Cause: -|NVDA\(|pagin|proc: t|Roamed|rror|ssert|Thrott|tim(ed? ?|ing )o|WARN' -k Message Rne 'Goog|ksadm|SMC:' -o -k Sender fseventsd -k Message Req 'SL' " '-du -n DEV -n EDEV 1 10' 'acrx -o comm,ruid,%cpu' '-t1 10 1' '-f -pfc /var/db/r*/com.apple.*.{BS,Bas,Es,OSXU,Rem,up}*.bom' '{/,}L*/Lo*/Diag* -type f -regex .\*[cgh] ! -name *ag \( -exec grep -lq "^Thread c" {} \; -exec printf \* \; -o -true \) -execdir stat -f:%Sc:%N -t%F {} \;|sort -t: -k2 |tail -n'${p[38]} '-L {/{S*/,},}L*/Lau* -type f' '-L /{S*/,}L*/StartupItems -type f -exec file {} +' '-L /S*/L*/{C*/Sec*A,E}* {/,}L*/{A*d,Ca*/*/Ex,Compon,Ex,In,iTu,Keyb,Mail/B,P*P,Qu*T,Scripti,Sec,Servi,Spo,Widg}* -type f -name Info.plist' '/usr/lib -type f -name *.dylib' `awk "${s[31]}"<<<${p[23]}` "/e*/{auto,{cron,fs}tab,hosts,[lps]*.conf,pam.d,ssh{,d}_config,*.local} {,/usr/local}/etc/periodic/*/* /L*/P*{,/*}/com.a*.{Bo,sec*.ap}* .launchd.conf" list getenv /Library/Preferences/com.apple.alf\ globalstate --proxy '-n get default' -I --dns -getdnsservers -getinfo\ "${p[N5]}" -P -m\ / '' -n1 '-R -l1 -n1 -o prt -stats command,uid,prt' '--regexp --only-files --files com.apple.pkg.*|sort|uniq' -kl -l -s\ / '-R -l1 -n1 -o mem -stats command,uid,mem' -i4TCP:0-1023 com.apple.dashboard\ layer-gadgets '-d /L*/Mana*/$USER&&echo On' );N1=${#c2[@]};for j in {0..8};do c2[N1+j]=SP${p[j]}DataType;done;N2=${#c2[@]};for j in 0 1;do c2[N2+j]="-n ' syscall::'${p[33+j]}':return { @out[execname,uid]=sum(arg0) } tick-10sec { trunc(@out,1);exit(0);} '";done;l=(Restricted\ files Hidden\ apps 'Elapsed time (s)' POST Battery Safari\ extensions Bad\ plists 'High file counts' User Heat System\ load boot\ args FileVault Diagnostic\ reports Log 'Free space (MiB)' 'Swap (MiB)' Activity 'CPU per process' Login\ hook 'I/O per process' Mach\ ports kexts Daemons Agents launchd Startup\ items Admin\ access Root\ access Bundles dylibs Apps Font\ issues Inserted\ dylibs Firewall Proxies DNS TCP/IP Wi-Fi Profiles Root\ crontab User\ crontab 'Global login items' 'User login items' Spotlight Memory Listeners Widgets Parental\ Controls );N3=${#l[@]};for i in 0 1 2;do l[N3+i]=${p[5+i]};done;N4=${#l[@]};for j in 0 1;do l[N4+j]="Current ${p[29+j]}stream data";done;A0() { id -G|grep -qw 80;v[1]=$?;((v[1]==0))&&sudo true;v[2]=$?;v[3]=`date +%s`;clear >&-;date '+Start time: %T %D%n';};for i in 0 1;do eval ' A'$((1+i))'() { v=` eval "${c1[$1]} ${c2[$2]}"|'${c1[30+i]}' "${s[$3]}" `;[[ "$v" ]];};A'$((3+i))'() { v=` while read i;do [[ "$i" ]]&&eval "${c1[$1]} ${c2[$2]}" \"$i\"|'${c1[30+i]}' "${s[$3]}";done<<<"${v[$4]}" `;[[ "$v" ]];};A'$((5+i))'() { v=` while read i;do '${c1[30+i]}' "${s[$1]}" "$i";done<<<"${v[$2]}" `;[[ "$v" ]];};';done;A7(){ v=$((`date +%s`-v[3]));};B2(){ v[$1]="$v";};for i in 0 1;do eval ' B'$i'() { v=;((v['$((i+1))']==0))||{ v=No;false;};};B'$((3+i))'() { v[$2]=`'${c1[30+i]}' "${s[$3]}"<<<"${v[$1]}"`;} ';done;B5(){ v[$1]="${v[$1]}"$'\n'"${v[$2]}";};B6() { v=` paste -d: <(printf "${v[$1]}") <(printf "${v[$2]}")|awk -F: ' {printf("'"${f[$3]}"'",$1,$2)} ' `;};B7(){ v=`grep -Fv "${v[$1]}"<<<"$v"`;};C0(){ [[ "$v" ]]&&echo "$v";};C1() { [[ "$v" ]]&&printf "${f[$1]}" "${l[$2]}" "$v";};C2() { v=`echo $v`;[[ "$v" != 0 ]]&&C1 0 $1;};C3() { v=`sed -E "$s"<<<"$v"`&&C1 1 $1;};for i in 1 2;do for j in 2 3;do eval D$i$j'(){ A'$i' $1 $2 $3; C'$j' $4;};';done;done;{ A0;A2 0 $((N1+1)) 2;C0;A1 0 $N1 1;C0;B0;C2 27;B0&&! B1&&C2 28;D12 15 37 25 8;A1 0 $((N1+2)) 3;C0;D13 0 $((N1+3)) 4 3;D23 0 $((N1+4)) 5 4;for i in 0 1 2;do D13 0 $((N1+5+i)) 6 $((N3+i));done;D13 1 10 7 9;D13 1 11 8 10;D22 2 12 9 11;D12 3 13 10 12;D23 4 19 44 13;D23 5 14 12 14;D22 6 36 13 15;D22 7 37 14 16;D23 8 15 38 17;D22 9 16 16 18;B1&&{ D22 11 17 17 20;for i in 0 1;do D22 28 $((N2+i)) 45 $((N4+i));done;};D22 12 44 54 45;D22 12 39 15 21;A1 13 40 18;B2 4;B3 4 0 19;A3 14 6 32 0;B4 0 5 11;A1 17 41 20;B7 5;C3 22;B4 4 6 21;A3 14 7 32 6;B4 0 7 11;B3 4 0 22;A3 14 6 32 0;B4 0 8 11;B5 7 8;B1&&{ A2 19 26 23;B7 7;C3 23;};A2 18 26 23;B7 7;C3 24;A2 4 20 21;B7 6;B2 9;A4 14 7 52 9;B2 10;B6 9 10 4;C3 25;D13 4 21 24 26;B4 4 12 26;B3 4 13 27;A1 4 22 29;B7 12;B2 14;A4 14 6 52 14;B2 15;B6 14 15 4;B3 0 0 30;C3 29;A1 4 23 27;B7 13;C3 30;D13 24 24 32 31;D13 25 37 32 33;A1 23 18 28;B2 16;A2 16 25 33;B7 16;B3 0 0 34;B2 21;A6 47 21&&C0;B1&&{ D13 21 0 32 19;D13 10 42 32 40;D22 29 35 46 39;};D23 14 1 48 42;D12 34 43 53 44;D22 0 $((N1+8)) 51 32;D13 4 8 41 6;D12 26 28 35 34;D13 27 29 36 35;A2 27 32 39&&{ B2 19;A2 33 33 40;B2 20;B6 19 20 3;};C2 36;D23 33 34 42 37;B1&&D23 35 45 55 46;D23 32 31 43 38;D12 36 47 32 48;D13 20 42 32 41;D23 14 2 48 43;D13 4 5 32 1;D22 4 4 50 0;D13 14 3 49 5;B3 4 22 57;A1 26 46 56;B7 22;B3 0 0 58;C3 47;D23 22 9 37 7;A7;C2 2;} 2>/dev/null|pbcopy;exit 2>&-
Copy the selected text to the Clipboard by pressing the key combination command-C.
7. Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
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Click anywhere in the Terminal window and paste by pressing command-V. The text you pasted should vanish immediately. If it doesn't, press the return key.
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exec bash
and press return. Then paste the script again.
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If you're not logged in as an administrator, you won't be prompted for a password. The test will still run. It just won't do anything that requires administrator privileges.
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11. When the test is complete, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
At the top of the results, there will be a line that begins with "Model Identifier." If you don't see that, but instead see a mass of gibberish, you didn't wait for the "Process completed" message to appear in the Terminal window. Please wait for it and try again.
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Note: This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Use Agreement for the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed. -
How to edit jtable programmatically?
id like to know how to edit jtable cell programmatically.
thanks!override
getTableCellEditorComponent in customized
TableCellEditor.Hi,
hmm ... if that's that, what he want to know? - I guess, he wants to know how to change values of the JTable by program.
Every JTable has an underlying TableDataModel that holds the values of the tablecells. You can retrieve this model by the getModel()-method of the JTable.
To get a value from the model use method getValueAt(row,column) of the model.
To set a value in the model use method setValueAt(object,row,column) of the model.
See the TableModel-interface-Documentation for other methods.
greetings Marsian -
Dynamically resize JTable cell to fit a JList
Hi!
I've been banging my head trying to add some dynamic behavior to a TableCellEditor. In short I'm trying trying to make it resize the height of the current row (the one it is in) to reflect the changes made to the JList used to let the user edit the cells value (which is a list of items).
I've come across some threads dealing with the problem of resizing a cell to fit its content. This however is usually only done once (in the 'getTableCellEditorComponent' function) and so only provides half the answer. Also, since the editor is only active during cell editing I've been trying to make it revert to the old cell height after the editing is done.
So far I have not come up with any decent solution to this problem and was hoping someone out there might have an idea or have read something similar and can point me to something helpful... anyone?
Cheers!
TeoThe Swing tutorial on[url http://java.sun.com/docs/books/tutorial/uiswing/components/table.html]How to Use Tables shows how to dynamically change the size to Table Columns.
If you need help calculating the acutal size then try searching the forum. Using keywords "resize jtable column" (keywords I took directly from your topic title) I found some promising postings. -
JTable cell being edited after model changed.
I have a fairly simple JTable, with a implementation of AbstractTableModel supplying the data. The cells are edited by using a JComboBox. I wrap these into a DefaultCellEditor. I have a KeyListener attached to the JTable listening for VK_DELETE, and when it finds one, instructs the model to delete the row represented by the selected row in the table.
Everything works fine until I want to delete a row from the table. My scenario is:
- I click in a cell, and the editor opens.
- I select an entry in the list. The editor closes, the result is rendered, and the wee yellow box around the cell is shown
- I hit the delete key.
- My key listener picks up the event, and informs the model to delete the row. I remove the row from the model and invoke fireTableDataChanged().
The result is that the row is deleted, but the table ends up with the cell editor deployed on the cell of the row below (which is now at the same row as the one I just deleted).
My tracing shows that the isCellEditable is called on the model after the delete. I don't know why.
Can anyone explain how to prevent this or what might be causing the table to think that the cell needs editing?
Thanks, AndrewIt will do whatever is the default. I wrap the JComboBox in a DefaultCellEditor. I can't see how the editor is involved at this point, or why the editor becomes involved after the row has been deleted.
Remember, at the time that I hit the delete key, there is no editor rendered or visible. I have the JTable displayed, a row selected, and the yellow box around one of the (editable but not currently being edited) cells. This has been achieved by editing a cell (displaying the cell editor - a combo box) and selecting an entry. The editor is removed, and the cell displayed with the (default) cell renderer for the table.
The delete action is caught by the listener on the table, the model is instructed to delete a row from its underlying data, which fires a fireTableDataChanged event.
That is all I do. After that it is all swing. The table model starts getting asked about cells being editable after I have finished deleting the row. I'll post the relevant code below if that helps.
The datamodel is of class ConstraintTableModel (see below) and the column model is of class DefaultTableColumnModel
JTable table = new JTable( dataModel, columnModel );The column model is defined liike so:
columnModel = new DefaultTableColumnModel();
TableColumn labelColumn = new TableColumn(ConstraintTableModel.LABEL_COLUMN);
labelColumn.setHeaderValue( dataModel.getColumnName(ConstraintTableModel.LABEL_COLUMN));
labelColumn.setPreferredWidth( 5 );
labelColumn.setMaxWidth( 5 );
labelColumn.setResizable( false );
TableColumn taskColumn = new TableColumn(ConstraintTableModel.TASK_COLUMN);
taskColumn.setHeaderValue( dataModel.getColumnName(ConstraintTableModel.TASK_COLUMN));
TableColumn typeColumn = new TableColumn(ConstraintTableModel.TYPE_COLUMN);
typeColumn.setHeaderValue( dataModel.getColumnName(ConstraintTableModel.TYPE_COLUMN));
columnModel.addColumn( labelColumn );
columnModel.addColumn( taskColumn );
columnModel.addColumn( typeColumn );I add the key listener like so:
table.addKeyListener( new KeyAdapter()
public void keyPressed( KeyEvent e )
if( e.getKeyCode() == KeyEvent.VK_DELETE )
log.debug("Delete pressed in listener attached to table ");
JTable t = (JTable) e.getSource();
int selectedRow = t.getSelectedRow();
if( selectedRow >= 0 )
log.debug(" Removing row " + selectedRow);
((ConstraintTableModel)t.getModel()).removeRow(selectedRow);
log.debug("Finished with key press");
} );The cell editor is created like this:
JComboBox taskEditorComponent = new JComboBox( tasksModel );
taskEditorComponent.setFont( GanttChart.tableFont );
taskEditorComponent.setBackground( Color.WHITE );
DefaultCellEditor taskEditor = new DefaultCellEditor(taskEditorComponent);
taskEditor.setClickCountToStart( 1 );
table.setDefaultEditor( GanttTask.class, taskEditor );The model is coded like so:
class ConstraintTableModel extends AbstractTableModel
// Constants
public static final int LABEL_COLUMN = 0;
public static final int TASK_COLUMN = 1;
public static final int TYPE_COLUMN = 2;
private Vector columnNames;
private ArrayList dataRows;
public ConstraintTableModel()
super();
this.buildDataVector();
this.addPrimerRow();
* Every row in the table is a GanttConstraint. Therefore when deciding what to
* display in any particular column of the table, we need to determine what the
* column is, and then use the informatino in the GanttConstraint to go out to the
* lookup and get the relevant object, and value to display.
public Object getValueAt( int row, int col )
Object returnObject = "";
GanttConstraint aConstraint = (GanttConstraint) this.getDataRows().get( row );
// We're rendering the task column. If there's no task id (partially filled in row)
// return blank otherwise return the master task
else if( col == ConstraintTableModel.TASK_COLUMN )
if( aConstraint.getMasterId() != null )
GanttTask masterTask = (GanttTask) real.getLookup().get( aConstraint.getMasterId() );
returnObject = masterTask;
// We're rendering the type column. If there's no type (partially filled in row)
// return blank otherwise return the constraint type
else if( col == ConstraintTableModel.TYPE_COLUMN )
if( aConstraint.getType() != null )
GanttConstraintType constraintType = (GanttConstraintType) GanttConstraintType.getConstraintTypes()
.get( aConstraint.getType()
.intValue() );
returnObject = constraintType;
return returnObject;
* When we receive this message, we are handed an object of the type specified in
* getColumnClass. We need to take this object and place the relevant information into
* the GanttConstraint row in the table model.
* Depending on whether the row being modified is an existing row or a new row, set
* the state of the constraint appropriately.
* @see javax.swing.table.TableModel#setValueAt(java.lang.Object, int, int)
public void setValueAt( Object value, int row, int col )
log.debug( "+setValueAt (row/col) " + row + "/" + col );
if ( value == null )
log.debug( " handed a null value. Returning" );
return;
GanttConstraint aConstraint = (GanttConstraint) this.getDataRows().get( row );
// If we are modifying the primer row, add another primer row.
if( row == ( this.getRowCount() - 1 ) ) // Last row is always the primer
log.debug( " adding a primer row" );
this.addPrimerRow();
// We're modifying the Task data. Get the GanttTask handed to us and place it
// into the master slot in the constraint.
if( col == ConstraintTableModel.TASK_COLUMN ) // Task
log.debug( " updating the master task" );
GanttTask selectedTask = (GanttTask) value;
aConstraint.setMaster( selectedTask );
// We're modifying the Type data. Get the GanttConstraintType handed to us and place it
// into the type slot in the constraint.
if( col == ConstraintTableModel.TYPE_COLUMN ) // Constraint type
log.debug( " updating the constraint type" );
GanttConstraintType selectedConstraintType = (GanttConstraintType) value;
aConstraint.setType( selectedConstraintType.getType() );
log.debug( "-setValueAt" );
public Class getColumnClass( int col )
Class columnClass = super.getColumnClass( col );
if( col == ConstraintTableModel.LABEL_COLUMN )
columnClass = String.class;
if( col == ConstraintTableModel.TASK_COLUMN )
columnClass = GanttTask.class;
if( col == ConstraintTableModel.TYPE_COLUMN )
columnClass = GanttConstraintType.class;
return columnClass;
// We are handing the data storage
public void setDataRows( ArrayList dataRows )
this.dataRows = dataRows;
public boolean isCellEditable( int row, int col )
log.debug( "+isCellEditable (row/col) " + row + "/" + col );
if( !real.canEdit() )
return false;
if( ( col == ConstraintTableModel.TASK_COLUMN ) ||
( col == ConstraintTableModel.TYPE_COLUMN ) )
return true;
else
return false;
// We are handing the data storage
public ArrayList getDataRows()
return this.dataRows;
public String getColumnName( int column )
return (String) this.getColumnNames().get( column );
* Clean up rows that do not have both the master task and type set. Not interested in them
public void removeDirtyRows()
log.debug( "+removeDirtyRows" );
Iterator dataIterator = this.getDataRows().iterator();
while( dataIterator.hasNext() )
GanttConstraint element = (GanttConstraint) dataIterator.next();
if( ( element.getMasterId() == null ) || ( element.getType() == null ) )
element.setTransient();
dataIterator.remove();
fireTableDataChanged();
log.debug( "-removeDirtyRows" );
public void removeRow( int row )
log.debug( "+removeRow(" + row + ")" );
if( row < this.getDataRows().size() )
GanttConstraint aConstraint = (GanttConstraint) this.getDataRows().get( row );
this.getDataRows().remove( row );
if( aConstraint.isClone() )
aConstraint.setDeleted();
else
aConstraint.setTransient();
getClone().removeConstraint( aConstraint );
fireTableDataChanged();
if( this.getRowCount() == 0 )
this.addPrimerRow();
log.debug( "-removeRow" );
public void clearRow( int row )
log.debug( "+clearRow(" + row + ")" );
if( row < this.getDataRows().size() )
GanttConstraint aConstraint = (GanttConstraint) this.getDataRows().get( row );
aConstraint.setMasterId( null );
aConstraint.setType( null );
fireTableRowsUpdated( row, row );
log.debug( "-clearRow" );
public int getColumnCount()
return getColumnNames().size();
public int getRowCount()
return dataRows.size();
* The table will be filled with constraints relevant to 'clone'.
private void buildDataVector()
ArrayList data = new ArrayList( 1 );
Collection allConstraints = getClone().getStartConstraints();
allConstraints.addAll( getClone().getEndConstraints() );
Iterator constraintIter = allConstraints.iterator();
while( constraintIter.hasNext() )
GanttConstraint element = (GanttConstraint) constraintIter.next();
if( element.getType().equals( GanttConstraint.START_SPECIFIED ) ||
element.getType().equals( GanttConstraint.FINISH_FROM_DURATION ) )
continue;
else
data.add( element );
this.setDataRows( data );
private Vector getColumnNames()
if( columnNames == null )
columnNames = new Vector( 3 );
columnNames.add( " " ); // Needs space otherwise all the headers disappear
columnNames.add( "Task" );
columnNames.add( "Constraint" );
return columnNames;
private void addPrimerRow()
log.debug( "+addPrimerRow" );
// Create a constraint for the 'clone' task. Set it as transient until validation
// where we will deal with it if necessary.
GanttConstraint primer = new GanttConstraint( real.getLookup() );
primer.setObjectId( chart.getNextUniqueId() );
primer.setTransient();
primer.setSlave( getClone() );
primer.setProject( getClone().getProject() );
getClone().addConstraint( primer );
this.getDataRows().add( primer );
int lastRow = this.getRowCount() - 1;
fireTableRowsInserted( lastRow, lastRow );
log.debug( "-addPrimerRow" ); -
Here's how to do ALV (OO) with dynamic fcat, int table and editable data
Hi everybody
Here's a more useful approach to ALV grid with OO using dynamic table, data NOT from DDIC, dynamic FCAT and how to get changed lines from the grid when ENTER key is pressed.
It's really not too dificult but I think this is more useful than the ever present SFLIGHT methods from the demos.
This also defines a subclass of cl_gui_alv_grid so you can access the protected attributes / methods of that class.
You don't need to add the class via SE24 -- done fron this ABAP.
When you run it click Edit for the first time.
After editing data press ENTER and the break point should bring you into the relevant method.
Code developed on NW2004S trial version but also works on rel 6.40 on a "Real" system.
The code should work without any changes on any system >=6.40.
All you need to do is to create a blank screen 100 via SE51 with a custom container on it called CCONTAINER1.
The rest of the code can just be uploaded into your system using the SE38 upload facility.
When running the program click on the EDIT button to enable the edit functionality of the grid.
Change your data and when you press ENTER you should get the break-point where you can see the original table and changed rows.
This program is actually quite general as it covers Dynamic tables, building a dynamic fcat where your table fields are NOT in the DDIC, intercepting the ENTER key via using an event, and accessing the protected attributes of the cl_gui_alv_grid by defining a subclass of this class in the abap.
I've seen various questions relating to all these functions but none in my view ever answers the questions in a simple manner. I hope this simple program will answer all these and show how using OO ALV is actually quite easy and people shouldn't be scared of using OO.
Have fun and award points if useful.
Cheers
Jimbo.
<b>PROGRAM zdynfieldcat.
Simple test of dynamic ITAB with user defined (not ddic) fields
Build dynamic fcat
use ALV grid to display and edit.
*When edit mode set to 1 toolbar gives possibility of adding and
*deleting rows.
*Define subclass of cl_gui_alv_grid so we can use protected attributes
*and methods.
Add event handler to intercept user entering data and pressing the
*ENTER key.
When enter key is pressed get actual value of NEW table (all rows)
rather than just the changed data.
*use new RTTI functionality to retrieve internal table structure
*details.
Create a blank screen 100 with a custom container called CCONTAINER1.
James Hawthorne
include <icon>.
define any old internal structure NOT in DDIC
types: begin of s_elements,
anyfield1(20) type c,
anyfield2(20) type c,
anyfield3(20) type c,
anyfield4(20) type c,
anyfield5(11) type n,
end of s_elements.
types: lt_rows type lvc_t_roid.
Note new RTTI functionality allows field detail retrieval
at runtime for dynamic tables.
data: wa_element type s_elements ,
wa_data type s_elements,
c_index type sy-index,
c_dec2 type s_elements-anyfield5,
wa_it_fldcat type lvc_s_fcat,
it_fldcat type lvc_t_fcat,
lr_rtti_struc TYPE REF TO cl_abap_structdescr, "RTTI
lt_comp TYPE cl_abap_structdescr=>component_table,"RTTI
ls_comp LIKE LINE OF lt_comp, "RTTI
zog like line of lr_rtti_struc->components, "RTTI
struct_grid_lset type lvc_s_layo,
l_valid type c,
new_table type ref to data.
field-symbols: <dyn_table> type standard table,
<actual_tab> type standard table,
<fs1> type ANY,
<FS2> TYPE TABLE.
data: grid_container1 type ref to cl_gui_custom_container.
class lcl_grid_event_receiver definition deferred.
data: g_event_receiver type ref to lcl_grid_event_receiver.
data: ls_modcell type LVC_S_MODI,
stab type ref to data,
sdog type s_elements. .
class lcl_grid_event_receiver definition.
public section.
methods:
handle_data_changed
for event data_changed of cl_gui_alv_grid
importing er_data_changed,
toolbar for event toolbar of cl_gui_alv_grid
importing e_object
e_interactive,
user_command for event user_command of cl_gui_alv_grid
importing e_ucomm.
endclass.
*implementation of Grid event-handler class
class lcl_grid_event_receiver implementation.
method handle_data_changed.
code whatever required after data entry.
various possibilites here as you can get back Cell(s) changed
columns or the entire updated table.
Data validation is also possible here.
perform check_data using er_data_changed.
endmethod.
Method for handling all creation/modification calls to the toolbar
method toolbar.
data : ls_toolbar type stb_button.
Define Custom Button in the toolbar
clear ls_toolbar.
move 0 to ls_toolbar-butn_type.
move 'EDIT' to ls_toolbar-function.
move space to ls_toolbar-disabled.
move 'Edit' to ls_toolbar-text.
move icon_change_text to ls_toolbar-icon.
move 'Click2Edit' to ls_toolbar-quickinfo.
append ls_toolbar to e_object->mt_toolbar.
clear ls_toolbar.
move 0 to ls_toolbar-butn_type.
move 'UPDA' to ls_toolbar-function.
move space to ls_toolbar-disabled.
move 'Update' to ls_toolbar-text.
move icon_system_save to ls_toolbar-icon.
move 'Click2Update' to ls_toolbar-quickinfo.
append ls_toolbar to e_object->mt_toolbar.
clear ls_toolbar.
move 0 to ls_toolbar-butn_type.
move 'EXIT' to ls_toolbar-function.
move space to ls_toolbar-disabled.
move 'Exit' to ls_toolbar-text.
move icon_system_end to ls_toolbar-icon.
move 'Click2Exit' to ls_toolbar-quickinfo.
append ls_toolbar to e_object->mt_toolbar.
endmethod.
method user_command.
case e_ucomm .
when 'EDIT'. "From Tool bar
perform set_input.
perform init_grid.
when 'UPDA'. "From Tool bar
perform refresh_disp.
perform update_table.
when 'EXIT'. "From Tool bar
leave program.
endcase.
endmethod.
endclass.
class zcltest definition inheriting from cl_gui_alv_grid.
define this as a subclass so we can access the protected attributes
of the superclass cl_gui_alv_grid
public section.
methods: constructor, disp_tab.
endclass.
need this now to instantiate object
as we are using subclass rather than the main cl_gui_alv_grid.
class zcltest implementation.
METHOD constructor.
CALL METHOD super->constructor
exporting i_appl_events = 'X'
i_parent = grid_container1.
endmethod.
method disp_tab.
FIELD-SYMBOLS: <outtab> TYPE STANDARD TABLE.
break-point 1.
mt_outtab is the data table held as a protected attribute
in class cl_gui_alv_grid.
ASSIGN me->mt_outtab->* TO <outtab>. "Original data
do whatever you want with <outtab>
contains data BEFORE changes each time.
Note that NEW (Changed) table has been obtained already by
call to form check_data USING P_ER_DATA_CHANGED
TYPE REF TO CL_ALV_CHANGED_DATA_PROTOCOL.
Entered data is in table defined by <fs2>
In this method you can compare original and changed data.
Easier than messing around with individual cells.
do what you want with data in <fs2> validate / update / merge etc
endmethod.
endclass.
data :
ok_code like sy-ucomm,
save_ok like sy-ucomm,
i4 type int4,
Container Object [grid_container]
now created via method constructor
in the subclass zcltest.
Control Object [grid]
grid1 type ref to zcltest,
Event-Handler Object [grid_handler]
grid_handler type ref to lcl_grid_event_receiver.
start-of-selection.
call screen 100.
module status_0100 output.
now display it as grid
if grid_container1 is initial.
create object grid_container1
exporting
container_name = 'CCONTAINER1'.
create object grid1.
break-point 1.
create object grid_handler.
set handler:
grid_handler->user_command for grid1,
grid_handler->toolbar for grid1,
grid_handler->handle_data_changed for grid1.
perform create_dynamic_fcat.
perform create_dynamic_itab.
perform populate_dynamic_itab.
perform init_grid.
perform register_enter_event.
set off ready for input initially
i4 = 0.
call method grid1->set_ready_for_input
exporting
i_ready_for_input = i4.
endif.
endmodule.
module user_command_0100 input.
*PAI not needed in OO ALV anymore as User Commands are handled as events
*in method user_command.
*we can also get control if the Data entered and the ENTER is pressed by
*raising an event.
Control then returns to method handle_data_changed.
endmodule.
form create_dynamic_fcat.
get structure of our user table for building field catalog
Use the RTTI functionality
lr_rtti_struc ?= cl_abap_structdescr=>describe_by_data( wa_data ).
Build field catalog just use basic data here
colour specific columns as well
loop at lr_rtti_struc->components into zog.
c_index = c_index + 1.
clear wa_it_fldcat.
wa_it_fldcat-fieldname = zog-name .
wa_it_fldcat-datatype = zog-type_kind.
wa_it_fldcat-inttype = zog-type_kind.
wa_it_fldcat-intlen = zog-length.
wa_it_fldcat-decimals = zog-decimals.
wa_it_fldcat-lowercase = 'X'.
if c_index eq 2.
wa_it_fldcat-emphasize = 'C411'.
endif.
if c_index eq 3.
wa_it_fldcat-emphasize = 'C511'.
endif.
append wa_it_fldcat to it_fldcat .
endloop.
endform.
form create_dynamic_itab.
Create dynamic internal table and assign to field sysmbol.
Use dynamic field catalog just built.
call method cl_alv_table_create=>create_dynamic_table
exporting
it_fieldcatalog = it_fldcat
importing
ep_table = new_table.
assign new_table->* to <dyn_table>.
endform.
form populate_dynamic_itab.
load up a line of the dynamic table
c_dec2 = c_dec2 + 11.
wa_element-anyfield1 = 'Tabbies'.
wa_element-anyfield2 = 'ger.shepards'.
wa_element-anyfield3 = 'White mice'.
wa_element-anyfield4 = 'Any old text'.
wa_element-anyfield5 = c_dec2.
append wa_element to <dyn_table>.
endform.
form check_data USING P_ER_DATA_CHANGED
TYPE REF TO CL_ALV_CHANGED_DATA_PROTOCOL.
Get altered data back
ASSIGN p_er_data_changed->mp_mod_rows TO <FS1>.
stab = p_er_data_changed->mp_mod_rows.
ASSIGN STAB->* TO <FS2>.
LOOP AT <FS2> INTO sdog.
ALV grid display with altered data is now in <fs2>.
do any extra processing you want here
endloop.
now display new table
call method grid1->disp_tab.
endform.
form exit_program.
call method grid_container1->free.
call method cl_gui_cfw=>flush.
leave program.
endform.
form refresh_disp.
call method grid1->refresh_table_display.
endform.
form update_table.
The dynamic table here is the changed table read from the grid
after user has changed it
Data can be saved to DB or whatever.
loop at <dyn_table> into wa_element.
do what you want with the data here
endloop.
switch off edit mode again for next function
i4 = 0.
call method grid1->set_ready_for_input
exporting
i_ready_for_input = i4.
endform.
form set_input.
i4 = 1.
call method grid1->set_ready_for_input
exporting
i_ready_for_input = i4.
endform.
form switch_input.
if i4 = 1.
i4 = 0.
else.
i4 = 1.
endif.
call method grid1->set_ready_for_input
exporting
i_ready_for_input = i4.
endform.
form init_grid.
Enabling the grid to edit mode,
struct_grid_lset-edit = 'X'. "To enable editing in ALV
struct_grid_lset-grid_title = 'Jimbos Test'.
call method grid1->set_table_for_first_display
exporting
is_layout = struct_grid_lset
changing
it_outtab = <dyn_table>
it_fieldcatalog = it_fldcat.
endform.
form register_enter_event.
call method grid1->register_edit_event
exporting
i_event_id = cl_gui_alv_grid=>mc_evt_enter.
Instantiate the event or it won't work.
create object g_event_receiver.
set handler g_event_receiver->handle_data_changed for grid1.
endform.</b>Hi there
IE7 doesn't give me the add new page option and I get 404 error when trying to access the "How to contribute" section.
I'll load up Firefox later (this browser usually works when IE7 doesn't always work properly).
I'll copy the stuff to the wiki when I've got the browser sorted out.
Cheers
jimbp -
Multi threading race condition in JTable while rendering and truncating?
Hi All,
It seems that there is a race confition when rendering a large table which is truckated by another thread while rendering it on a JTable view.
Let me try to explain what I think is the problem:
When considering the folowing code from BasicTableUI
First the size of the tbale model is determined in
public void paint(Graphics g, JComponent c) {
[snip]
if (rMax == -1) {
rMax = table.getRowCount()-1;
}then this cMax is passed to:
private void paintCells(Graphics g, int rMin, int rMax, int cMin, int cMax) {
JTableHeader header = table.getTableHeader();
TableColumn draggedColumn = (header == null) ? null : header.getDraggedColumn();
TableColumnModel cm = table.getColumnModel();
int columnMargin = cm.getColumnMargin();
Rectangle cellRect;
TableColumn aColumn;
int columnWidth;
if (table.getComponentOrientation().isLeftToRight()) {
for(int row = rMin; row <= rMax; row++) {
cellRect = table.getCellRect(row, cMin, false);
for(int column = cMin; column <= cMax; column++) {
aColumn = cm.getColumn(column);
columnWidth = aColumn.getWidth();
cellRect.width = columnWidth - columnMargin;
if (aColumn != draggedColumn) {
paintCell(g, cellRect, row, column);
cellRect.x += columnWidth;
} else {The prepareRenderer works like this:
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Object value = getValueAt(row, column);
[snip]
return renderer.getTableCellRendererComponent(this, value,
isSelected, hasFocus,
row, column);
}Here the above getValueAt is called for every cell to be rendered (in one thread) , while async a row can be deleted (in another thread) while the tables rendereing is still in progress. This leads to a value to be unexpectedly be null in the above return renderer.getTableCellRendererComponent method call: this method could return an empty panel to indicated that the cell is gone which is strange behaviour because the row doesn't exists anymore. The other option would be to return a null renderer so that the cell won't be rendered but that is impossible because the code doens't expect a null renderer. The third option could to be synchronize somehow the 2 threads so that any delete on the model has to wait until the rendering has finished.
A possble solution could be to make paintCells at least protected and change to code to see if the designated row still exists, and if not don't increment the row height
Any help/feedback is greatly appreciated!
Note that this question is based upon Java5 and I do not know if this is also true for Java6
Thnx
Andr'eSo this means that a TableModel must be manupulated (setValueAt , adding deleting and/or updating objects in this TableModel) through a thread in the EventQueue!
i.e. (pseudo code)
EventQueue.invokeLater(new Runnable() {
public void run() {
getTableModel().setValueAt(........)
});A
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