Jtable fusionner cellule

**maxoup** · 01/08/2016, 19h25

Bonjour,

Je souhaiterai dépoussiérer un vieux sujet concernant la fusion des cellules dans un Jtable.

J'ai vu qu'il y a eu des discussions mais cela date un peu et les liens proposait ne marche plus.

Est ce que quelqu'un connait la méthode pour fusionner des cellules dans un Jtable?

Merci d'avance!

**joel.drigo** · 01/08/2016, 19h29

Salut,

Nativement, une JTable ne permet pas de fusionner de cellules. Il faut le réaliser soit-même et on trouve effectivement de nombreux exemples sur Internet, et ils restent valables. On peut trouver des composants qui implémentent cette notion dans certaines bibliothèques également.

**maxoup** · 01/08/2016, 19h39

Merci d'avoir répondu si rapidement!

**maxoup** · 09/08/2016, 16h51

Voici une solution que j'ai trouvé :

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Enumeration;
import java.util.Vector;
 
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSeparator;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.TableModelEvent;
import javax.swing.plaf.basic.BasicTableUI;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
 
 
/**
* @version 1.0 11/26/98
*/
public class MultiSpanCellTableExample extends JFrame {
 
MultiSpanCellTableExample() {
 super( "Multi-Span Cell Example" );
 
 AttributiveCellTableModel ml = new AttributiveCellTableModel(10,6);
 
 final CellSpan cellAtt =(CellSpan)ml.getCellAttribute();
 final MultiSpanCellTable table = new MultiSpanCellTable( ml );
 JScrollPane scroll = new JScrollPane( table );
 
 JButton b_one   = new JButton("Combine");
 b_one.addActionListener(new ActionListener() {
   public void actionPerformed(ActionEvent e) {
int[] columns = table.getSelectedColumns();
int[] rows    = table.getSelectedRows();
cellAtt.combine(rows,columns);
table.clearSelection();
table.revalidate();
table.repaint();
   }
 });
 JButton b_split = new JButton("Split");
 b_split.addActionListener(new ActionListener() {
   public void actionPerformed(ActionEvent e) {
int column = table.getSelectedColumn();
int row    = table.getSelectedRow();
cellAtt.split(row,column);
table.clearSelection();
table.revalidate();
table.repaint();
   }
 });
 JPanel p_buttons = new JPanel();
 p_buttons.setLayout(new GridLayout(2,1));
 p_buttons.add(b_one);
 p_buttons.add(b_split);
 
 Box box = new Box(BoxLayout.X_AXIS);
 box.add(scroll);
 box.add(new JSeparator(SwingConstants.HORIZONTAL));
 box.add(p_buttons);
 getContentPane().add( box );
 setSize( 400, 200 );
 setVisible(true);
}
 
public static void main(String[] args) {
 MultiSpanCellTableExample frame = new MultiSpanCellTableExample();
 frame.addWindowListener( new WindowAdapter() {
   public void windowClosing( WindowEvent e ) {
     System.exit(0);
   }
 });
}
}
 
class AttributiveCellTableModel extends DefaultTableModel {
 
protected CellAttribute cellAtt;
 
public AttributiveCellTableModel() {
 this((Vector)null, 0);
}
public AttributiveCellTableModel(int numRows, int numColumns) {
 Vector names = new Vector(numColumns);
 names.setSize(numColumns);
 setColumnIdentifiers(names);
 dataVector = new Vector();
 setNumRows(numRows);
 cellAtt = new DefaultCellAttribute(numRows,numColumns);
}
public AttributiveCellTableModel(Vector columnNames, int numRows) {
	  columnIdentifiers = columnNames;
 dataVector = new Vector();
 setNumRows(numRows);
 cellAtt = new DefaultCellAttribute(numRows,columnNames.size());
}
public AttributiveCellTableModel(Object[] columnNames, int numRows) {
 this(convertToVector(columnNames), numRows);
}  
public AttributiveCellTableModel(Vector data, Vector columnNames) {
 setDataVector(data, columnNames);
}
public AttributiveCellTableModel(Object[][] data, Object[] columnNames) {
 setDataVector(data, columnNames);
}
 
 
public void setDataVector(Vector newData, Vector columnNames) {
 if (newData == null)
   throw new IllegalArgumentException("setDataVector() - Null parameter");
 dataVector = new Vector(0);
 columnIdentifiers = columnNames;
 dataVector = newData;
 
 //
 cellAtt = new DefaultCellAttribute(dataVector.size(),
                                    columnIdentifiers.size());
 
 newRowsAdded(new TableModelEvent(this, 0, getRowCount()-1,
  TableModelEvent.ALL_COLUMNS, TableModelEvent.INSERT));
}
 
public void addColumn(Object columnName, Vector columnData) {
 if (columnName == null)
   throw new IllegalArgumentException("addColumn() - null parameter");
 columnIdentifiers.addElement(columnName);
 int index = 0;
 Enumeration eeration = dataVector.elements();
 while (eeration.hasMoreElements()) {
   Object value;
   if ((columnData != null) && (index < columnData.size()))
 value = columnData.elementAt(index);
   else
value = null;
   ((Vector)eeration.nextElement()).addElement(value);
   index++;
 }
 
 //
 cellAtt.addColumn();
 
 fireTableStructureChanged();
}
 
public void addRow(Vector rowData) {
 Vector newData = null;
 if (rowData == null) {
   newData = new Vector(getColumnCount());
 }
 else {
   rowData.setSize(getColumnCount());
 }
 dataVector.addElement(newData);
 
 //
 cellAtt.addRow();
 
 newRowsAdded(new TableModelEvent(this, getRowCount()-1, getRowCount()-1,
    TableModelEvent.ALL_COLUMNS, TableModelEvent.INSERT));
}
 
public void insertRow(int row, Vector rowData) {
 if (rowData == null) {
   rowData = new Vector(getColumnCount());
 }
 else {
   rowData.setSize(getColumnCount());
 }
 
 dataVector.insertElementAt(rowData, row);
 
 //
 cellAtt.insertRow(row);
 
 newRowsAdded(new TableModelEvent(this, row, row,
    TableModelEvent.ALL_COLUMNS, TableModelEvent.INSERT));
}
 
public CellAttribute getCellAttribute() {
 return cellAtt;
}
 
public void setCellAttribute(CellAttribute newCellAtt) {
 int numColumns = getColumnCount();
 int numRows    = getRowCount();
 if ((newCellAtt.getSize().width  != numColumns) ||
     (newCellAtt.getSize().height != numRows)) {
   newCellAtt.setSize(new Dimension(numRows, numColumns));
 }
 cellAtt = newCellAtt;
 fireTableDataChanged();
}
 
 
 
}
 
 
/**
* @version 1.0 11/22/98
*/
 
class DefaultCellAttribute 
// implements CellAttribute ,CellSpan  {
   implements CellAttribute ,CellSpan ,ColoredCell ,CellFont {
 
//
// !!!! CAUTION !!!!!
// these values must be synchronized to Table data
//
protected int rowSize;
protected int columnSize;
protected int[][][] span;                   // CellSpan
protected Color[][] foreground;             // ColoredCell
protected Color[][] background;             //
protected Font[][]  font;                   // CellFont
 
public DefaultCellAttribute() {
 this(1,1);
}
 
public DefaultCellAttribute(int numRows, int numColumns) {
 setSize(new Dimension(numColumns, numRows));
}
 
protected void initValue() {
 for(int i=0; i<span.length;i++) {
   for(int j=0; j<span[i].length; j++) {
span[i][j][CellSpan.COLUMN] = 1;
span[i][j][CellSpan.ROW]    = 1;
   }
 }
}
 
 
//
// CellSpan
//
public int[] getSpan(int row, int column) {
 if (isOutOfBounds(row, column)) {
   int[] ret_code = {1,1};
   return ret_code;
 }
 return span[row][column];
}
 
public void setSpan(int[] span, int row, int column) {
 if (isOutOfBounds(row, column)) return;
 this.span[row][column] = span;
}
 
public boolean isVisible(int row, int column) {
 if (isOutOfBounds(row, column)) return false;
 if ((span[row][column][CellSpan.COLUMN] < 1)
   ||(span[row][column][CellSpan.ROW]    < 1)) return false;
 return true;
}
 
public void combine(int[] rows, int[] columns) {
 if (isOutOfBounds(rows, columns)) return;
 int    rowSpan  = rows.length;
 int columnSpan  = columns.length;
 int startRow    = rows[0];
 int startColumn = columns[0];
 for (int i=0;i<rowSpan;i++) {
   for (int j=0;j<columnSpan;j++) {
if ((span[startRow +i][startColumn +j][CellSpan.COLUMN] != 1)
 ||(span[startRow +i][startColumn +j][CellSpan.ROW]    != 1)) {
 //System.out.println("can't combine");
 return ;
}
   }
 }
 for (int i=0,ii=0;i<rowSpan;i++,ii--) {
   for (int j=0,jj=0;j<columnSpan;j++,jj--) {
span[startRow +i][startColumn +j][CellSpan.COLUMN] = jj;
span[startRow +i][startColumn +j][CellSpan.ROW]    = ii;
//System.out.println("r " +ii +"  c " +jj);
   }
 }
 span[startRow][startColumn][CellSpan.COLUMN] = columnSpan;
 span[startRow][startColumn][CellSpan.ROW]    =    rowSpan;
 
}
 
public void split(int row, int column) {
 if (isOutOfBounds(row, column)) return;
 int columnSpan = span[row][column][CellSpan.COLUMN];
 int    rowSpan = span[row][column][CellSpan.ROW];
 for (int i=0;i<rowSpan;i++) {
   for (int j=0;j<columnSpan;j++) {
span[row +i][column +j][CellSpan.COLUMN] = 1;
span[row +i][column +j][CellSpan.ROW]    = 1;
   }
 }
}
 
 
//
// ColoredCell
//
public Color getForeground(int row, int column) {
 if (isOutOfBounds(row, column)) return null;
 return foreground[row][column];
}
public void setForeground(Color color, int row, int column) {
 if (isOutOfBounds(row, column)) return;
 foreground[row][column] = color;
}
public void setForeground(Color color, int[] rows, int[] columns) {
 if (isOutOfBounds(rows, columns)) return;
 setValues(foreground, color, rows, columns);
}
public Color getBackground(int row, int column) {
 if (isOutOfBounds(row, column)) return null;
 return background[row][column];
}
public void setBackground(Color color, int row, int column) {
 if (isOutOfBounds(row, column)) return;
 background[row][column] = color;
}
public void setBackground(Color color, int[] rows, int[] columns) {
 if (isOutOfBounds(rows, columns)) return;
 setValues(background, color, rows, columns);
}
//
 
 
//
// CellFont
//
public Font getFont(int row, int column) {
 if (isOutOfBounds(row, column)) return null;
 return font[row][column];
}
public void setFont(Font font, int row, int column) {
 if (isOutOfBounds(row, column)) return;
 this.font[row][column] = font;
}
public void setFont(Font font, int[] rows, int[] columns) {
 if (isOutOfBounds(rows, columns)) return;
 setValues(this.font, font, rows, columns);
}
//
 
 
//
// CellAttribute
//
public void addColumn() {
 int[][][] oldSpan = span;
 int numRows    = oldSpan.length;
 int numColumns = oldSpan[0].length;
 span = new int[numRows][numColumns + 1][2];
 System.arraycopy(oldSpan,0,span,0,numRows);
 for (int i=0;i<numRows;i++) {
   span[i][numColumns][CellSpan.COLUMN] = 1;
   span[i][numColumns][CellSpan.ROW]    = 1;
 }
}
 
public void addRow() {
 int[][][] oldSpan = span;
 int numRows    = oldSpan.length;
 int numColumns = oldSpan[0].length;
 span = new int[numRows + 1][numColumns][2];
 System.arraycopy(oldSpan,0,span,0,numRows);
 for (int i=0;i<numColumns;i++) {
   span[numRows][i][CellSpan.COLUMN] = 1;
   span[numRows][i][CellSpan.ROW]    = 1;
 }
}
 
public void insertRow(int row) {
 int[][][] oldSpan = span;
 int numRows    = oldSpan.length;
 int numColumns = oldSpan[0].length;
 span = new int[numRows + 1][numColumns][2];
 if (0 < row) {
   System.arraycopy(oldSpan,0,span,0,row-1);
 }
 System.arraycopy(oldSpan,0,span,row,numRows - row);
 for (int i=0;i<numColumns;i++) {
   span[row][i][CellSpan.COLUMN] = 1;
   span[row][i][CellSpan.ROW]    = 1;
 }
}
 
public Dimension getSize() {
 return new Dimension(rowSize, columnSize);
}
 
public void setSize(Dimension size) {
 columnSize = size.width;
 rowSize    = size.height;
 span = new int[rowSize][columnSize][2];   // 2: COLUMN,ROW
 foreground = new Color[rowSize][columnSize];
 background = new Color[rowSize][columnSize];
 font = new Font[rowSize][columnSize];
 initValue();
}
 
/*
public void changeAttribute(int row, int column, Object command) {
}
 
public void changeAttribute(int[] rows, int[] columns, Object command) {
}
*/
 
 
 
 
protected boolean isOutOfBounds(int row, int column) {
 if ((row    < 0)||(rowSize    <= row)
   ||(column < 0)||(columnSize <= column)) {
   return true;
 }
 return false;
}
 
protected boolean isOutOfBounds(int[] rows, int[] columns) {
 for (int i=0;i<rows.length;i++) {
   if ((rows[i] < 0)||(rowSize <= rows[i])) return true;
 }
 for (int i=0;i<columns.length;i++) {
   if ((columns[i] < 0)||(columnSize <= columns[i])) return true;
 }
 return false;
}
 
protected void setValues(Object[][] target, Object value,
                        int[] rows, int[] columns) {
 for (int i=0;i<rows.length;i++) {
   int row = rows[i];
   for (int j=0;j<columns.length;j++) {
int column = columns[j];
target[row][column] = value;
   }
 }
}
}
/*
* (swing1.1beta3)
* 
*/
 
/**
* @version 1.0 11/22/98
*/
 
interface CellAttribute {
 
public void addColumn();
 
public void addRow();
 
public void insertRow(int row);
 
public Dimension getSize();
 
public void setSize(Dimension size);
 
 
}
/*
* (swing1.1beta3)
* 
*/
 
/**
* @version 1.0 11/22/98
*/
 
interface CellSpan {
public final int ROW    = 0;
public final int COLUMN = 1;
 
public int[] getSpan(int row, int column);
public void setSpan(int[] span, int row, int column);
 
public boolean isVisible(int row, int column);
 
public void combine(int[] rows, int[] columns);
public void split(int row, int column);
 
}
/*
* (swing1.1beta3)
* 
*/
 
/**
* @version 1.0 11/26/98
*/
 
class MultiSpanCellTable extends JTable {
 
public MultiSpanCellTable(TableModel model) {
 super(model);
 setUI(new MultiSpanCellTableUI());
 getTableHeader().setReorderingAllowed(false);
 setCellSelectionEnabled(true);
 setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
}
 
 
public Rectangle getCellRect(int row, int column, boolean includeSpacing) {
 Rectangle sRect = super.getCellRect(row,column,includeSpacing);
 if ((row <0) || (column<0) ||
     (getRowCount() <= row) || (getColumnCount() <= column)) {
     return sRect;
 }
 CellSpan cellAtt = (CellSpan)((AttributiveCellTableModel)getModel()).getCellAttribute();
 if (! cellAtt.isVisible(row,column)) {
   int temp_row    = row;
   int temp_column = column;
   row    += cellAtt.getSpan(temp_row,temp_column)[CellSpan.ROW];
   column += cellAtt.getSpan(temp_row,temp_column)[CellSpan.COLUMN];      
 }
 int[] n = cellAtt.getSpan(row,column);
 
 int index = 0;
 int columnMargin = getColumnModel().getColumnMargin();
 Rectangle cellFrame = new Rectangle();
 int aCellHeight = rowHeight + rowMargin;
 cellFrame.y = row * aCellHeight;
 cellFrame.height = n[CellSpan.ROW] * aCellHeight;
 
 Enumeration eeration = getColumnModel().getColumns();
 while (eeration.hasMoreElements()) {
   TableColumn aColumn = (TableColumn)eeration.nextElement();
   cellFrame.width = aColumn.getWidth() + columnMargin;
   if (index == column) break;
   cellFrame.x += cellFrame.width;
   index++;
 }
 for (int i=0;i< n[CellSpan.COLUMN]-1;i++) {
   TableColumn aColumn = (TableColumn)eeration.nextElement();
   cellFrame.width += aColumn.getWidth() + columnMargin;
 }
 
 
 
 if (!includeSpacing) {
   Dimension spacing = getIntercellSpacing();
   cellFrame.setBounds(cellFrame.x +      spacing.width/2,
     cellFrame.y +      spacing.height/2,
     cellFrame.width -  spacing.width,
     cellFrame.height - spacing.height);
 }
 return cellFrame;
}
 
 
private int[] rowColumnAtPoint(Point point) {
 int[] retValue = {-1,-1};
 int row = point.y / (rowHeight + rowMargin);
 if ((row <0)||(getRowCount() <= row)) return retValue;
 int column = getColumnModel().getColumnIndexAtX(point.x);
 
 CellSpan cellAtt = (CellSpan)((AttributiveCellTableModel)getModel()).getCellAttribute();
 
 if (cellAtt.isVisible(row,column)) {
   retValue[CellSpan.COLUMN] = column;
   retValue[CellSpan.ROW   ] = row;
   return retValue;
 }
 retValue[CellSpan.COLUMN] = column + cellAtt.getSpan(row,column)[CellSpan.COLUMN];
 retValue[CellSpan.ROW   ] = row + cellAtt.getSpan(row,column)[CellSpan.ROW];
 return retValue;
}
 
 
public int rowAtPoint(Point point) {
 return rowColumnAtPoint(point)[CellSpan.ROW];
}
public int columnAtPoint(Point point) {
 return rowColumnAtPoint(point)[CellSpan.COLUMN];
}
 
 
 
public void columnSelectionChanged(ListSelectionEvent e) {
 repaint();
}
 
public void valueChanged(ListSelectionEvent e) {
 int firstIndex = e.getFirstIndex();
 int  lastIndex = e.getLastIndex();
 if (firstIndex == -1 && lastIndex == -1) { // Selection cleared.
   repaint();
 }
 Rectangle dirtyRegion = getCellRect(firstIndex, 0, false);
 int numCoumns = getColumnCount();
 int index = firstIndex;
 for (int i=0;i<numCoumns;i++) {
   dirtyRegion.add(getCellRect(index, i, false));
 }
 index = lastIndex;
 for (int i=0;i<numCoumns;i++) {
   dirtyRegion.add(getCellRect(index, i, false));
 }
 repaint(dirtyRegion.x, dirtyRegion.y, dirtyRegion.width, dirtyRegion.height);
}
 
}
 
 
/**
* @version 1.0 11/26/98
*/
 
class MultiSpanCellTableUI extends BasicTableUI {
 
public void paint(Graphics g, JComponent c) {
 Rectangle oldClipBounds = g.getClipBounds();
 Rectangle clipBounds    = new Rectangle(oldClipBounds);
 int tableWidth   = table.getColumnModel().getTotalColumnWidth();
 clipBounds.width = Math.min(clipBounds.width, tableWidth);
 g.setClip(clipBounds);
 
 int firstIndex = table.rowAtPoint(new Point(0, clipBounds.y));
 int  lastIndex = table.getRowCount()-1;
 
 Rectangle rowRect = new Rectangle(0,0,
   tableWidth, table.getRowHeight() + table.getRowMargin());
 rowRect.y = firstIndex*rowRect.height;
 
 for (int index = firstIndex; index <= lastIndex; index++) {
   if (rowRect.intersects(clipBounds)) {
     //System.out.println();                  // debug
     //System.out.print("" + index +": ");    // row
paintRow(g, index);
   }
   rowRect.y += rowRect.height;
 }
 g.setClip(oldClipBounds);
}
 
private void paintRow(Graphics g, int row) {
 Rectangle rect = g.getClipBounds();
 boolean drawn  = false;
 
 AttributiveCellTableModel tableModel = (AttributiveCellTableModel)table.getModel();
 CellSpan cellAtt = (CellSpan)tableModel.getCellAttribute();
 int numColumns = table.getColumnCount();
 
 for (int column = 0; column < numColumns; column++) {
   Rectangle cellRect = table.getCellRect(row,column,true);
   int cellRow,cellColumn;
   if (cellAtt.isVisible(row,column)) {
cellRow    = row;
cellColumn = column;
 //  System.out.print("   "+column+" ");  // debug
   } else {
cellRow    = row + cellAtt.getSpan(row,column)[CellSpan.ROW];
cellColumn = column + cellAtt.getSpan(row,column)[CellSpan.COLUMN];
 //  System.out.print("  ("+column+")");  // debug
   }
   if (cellRect.intersects(rect)) {
drawn = true;
paintCell(g, cellRect, cellRow, cellColumn);
   } else {
if (drawn) break;
   } 
 }
 
}
 
private void paintCell(Graphics g, Rectangle cellRect, int row, int column) {
 int spacingHeight = table.getRowMargin();
 int spacingWidth  = table.getColumnModel().getColumnMargin();
 
 Color c = g.getColor();
 g.setColor(table.getGridColor());
 g.drawRect(cellRect.x,cellRect.y,cellRect.width-1,cellRect.height-1);
 g.setColor(c);
 
 cellRect.setBounds(cellRect.x + spacingWidth/2, cellRect.y + spacingHeight/2,
        cellRect.width - spacingWidth, cellRect.height - spacingHeight);
 
 if (table.isEditing() && table.getEditingRow()==row &&
table.getEditingColumn()==column) {
   Component component = table.getEditorComponent();
   component.setBounds(cellRect);
   component.validate();
 }
 else {
   TableCellRenderer renderer = table.getCellRenderer(row, column);
   Component component = table.prepareRenderer(renderer, row, column);
 
   if (component.getParent() == null) {
rendererPane.add(component);
   }
   rendererPane.paintComponent(g, component, table, cellRect.x, cellRect.y,
       cellRect.width, cellRect.height, true);
 }
}    
}
 
 
interface CellFont {
 
 public Font getFont(int row, int column);
 public void setFont(Font font, int row, int column);
 public void setFont(Font font, int[] rows, int[] columns);
 
 
}
 
 
interface ColoredCell {
 
 public Color getForeground(int row, int column);
 public void setForeground(Color color, int row, int column);
 public void setForeground(Color color, int[] rows, int[] columns);
 
 public Color getBackground(int row, int column);
 public void setBackground(Color color, int row, int column);
 public void setBackground(Color color, int[] rows, int[] columns);
 
}

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