Bonjour,

J'ai un problème avec un tableCellRenderer.
En effet, dès que j'ouvre la table mon processeur monte en utilisation très fortement. J'ai vu que ca venait d'un appel continue à la méthode getTableCellRendererComponent .

Voici le code.
Si quelqu'un peut m'aider.

Merci d'avance.

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.FontMetrics;
import java.awt.event.MouseEvent;
import java.sql.Date;
import java.util.Enumeration;
import java.util.EventObject;
import java.util.Vector;
 
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
 
public class MyTextAreaCell extends JTextArea implements TableCellRenderer,
		TableCellEditor {
 
	public MyTextAreaCell() {
		super();
	}
 
	public Component getTableCellRendererComponent(JTable table, Object value,
			boolean isSelected, boolean hasFocus, int row, int column) {
		if (isSelected) {
			setBackground(Color.BLUE);
			setForeground(Color.WHITE);
		} else {
			if ((row % 2) == 0) {
				setBackground(Color.YELLOW);
				setForeground(Color.BLACK);
			} else {
				setBackground(Color.WHITE);
				setForeground(Color.BLACK);
			}
		}
		setAlignmentX(JTextArea.CENTER_ALIGNMENT);
		setAlignmentY(JTextArea.CENTER_ALIGNMENT);
		setAutoscrolls(false);
		setLineWrap(true);
		setWrapStyleWord(true);
		setText((value.toString()));
		if (value.getClass().equals(d.getClass())) {
			setText(dc.getDateFR(value.toString()));
		} else {
			setText(value.toString());
		}
		table.setRowHeight(row, getHeight(this, table, value.toString(), row,
				column));
		TableColumn col = null;
		for (int i = 0; i < table.getColumnCount(); i++) {
		   col = table.getColumnModel().getColumn(i);
		   System.out.println(col.getWidth());
		   col.sizeWidthToFit();
		}
		return this;
	}
 
	public Component getTableCellEditorComponent(JTable table, Object value,
			boolean isSelected, int row, int column) {
		savedValue = value;
		setAlignmentX(JTextArea.CENTER_ALIGNMENT);
		setAlignmentY(JTextArea.CENTER_ALIGNMENT);
		setAutoscrolls(true);
		setLineWrap(true);
		setWrapStyleWord(true);
		setText((value.toString()));
		if (value.getClass().equals(d.getClass())) {
			setText(dc.getDateFR(value.toString()));
		} else {
			setText(value.toString());
		}
		return this;
	}
 
	private int getHeight(JTextArea textArea, JTable table, String text,
			int row, int column) {
		FontMetrics fm = getFontMetrics(textArea.getFont());
		int numberOfTextRows = 2;
		int numberOfTextRows_IncludingNewlines = 0;
		int textWidth = 0;
		int columnWidth = 0;
		if (fm != null) {
			textWidth = fm.stringWidth(text);
		}
		if (textWidth > 0) {
			TableColumn tableColumn = table.getColumnModel().getColumn(column);
			columnWidth = tableColumn.getWidth()
					- (textArea.getMargin().left + textArea.getMargin().right);
			numberOfTextRows = (textWidth / columnWidth + 1);
			if (text.indexOf('\n') > -1) {
				for (int index = 0; index < text.length();) {
					try {
						int index_1 = text.indexOf('\n', index);
						int index_2 = text.indexOf('\n', index + 1);
						String line = text.substring(index_1, index_2);
						textWidth = fm.stringWidth(line);
						numberOfTextRows_IncludingNewlines += ((textWidth / columnWidth) + 1);
						index = index_2;
					} catch (StringIndexOutOfBoundsException ex) {
						break;
					}
				}
				numberOfTextRows = Math.max(numberOfTextRows,
						numberOfTextRows_IncludingNewlines) + 2;
			}
		}
		int rowHeight = fm.getHeight() * (numberOfTextRows + 1);
		if (rowHeight > table.getRowHeight(row)) {
			return rowHeight;
		}
		return table.getRowHeight(row);
	}
 
	public boolean isCellEditable(EventObject anEvent) {
		if (anEvent instanceof MouseEvent) {
			MouseEvent evt = (MouseEvent) anEvent;
			if (evt.getClickCount() == 2) {
				return true;
			}
		}
		return false;
	}
 
	public boolean shouldSelectCell(EventObject anEvent) {
		return true;
	}
 
	public void addCellEditorListener(CellEditorListener l) {
		listeners.addElement(l);
	}
 
	public void removeCellEditorListener(CellEditorListener l) {
		listeners.removeElement(l);
	}
 
	public void cancelCellEditing() {
		setText(savedValue.toString()); // revert to last saved value
		ChangeEvent ce = new ChangeEvent(this);
		Vector copy = (Vector) listeners.clone();
		Enumeration e = copy.elements();
		while (e.hasMoreElements()) {
			CellEditorListener l = (CellEditorListener) e.nextElement();
			l.editingCanceled(ce);
		}
	}
 
	public boolean stopCellEditing() {
		ChangeEvent ce = new ChangeEvent(this);
		Vector copy = (Vector) listeners.clone();
		Enumeration e = copy.elements();
		while (e.hasMoreElements()) {
			CellEditorListener l = (CellEditorListener) e.nextElement();
			l.editingStopped(ce);
		}
		return true;
	}
 
	public Object getCellEditorValue() {
		return new String(getText());
	}
 
	Date_convert dc = new Date_convert();
 
	Date d = new Date(0);
 
	private transient Vector listeners = new Vector();
 
	private Object savedValue;
 
}