Jtable fusionner cellule

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!

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.

Merci d'avoir répondu si rapidement!

Voici une solution que j'ai trouvé :

Code:

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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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