/**
* This method is activated on the Keystrokes we are listening to in this implementation. Here it
* listens for Copy and Paste ActionCommands. Selections comprising non-adjacent cells result in
* invalid selection and then copy action cannot be performed. Paste is done by aligning the upper
* left corner of the selection with the 1st element in the current selection of the JTable.
*/
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().compareTo("Copy") == 0) {
StringBuffer sbf = new StringBuffer();
// Check to ensure we have selected only a contiguous block of
// cells
int numcols = jTable1.getSelectedColumnCount();
int numrows = jTable1.getSelectedRowCount();
int[] rowsselected = jTable1.getSelectedRows();
int[] colsselected = jTable1.getSelectedColumns();
if (!((numrows - 1 == rowsselected[rowsselected.length - 1] - rowsselected[0]
&& numrows == rowsselected.length)
&& (numcols - 1 == colsselected[colsselected.length - 1] - colsselected[0]
&& numcols == colsselected.length))) {
JOptionPane.showMessageDialog(
null, "Invalid Copy Selection", "Invalid Copy Selection", JOptionPane.ERROR_MESSAGE);
return;
}
for (int i = 0; i < numrows; i++) {
for (int j = 0; j < numcols; j++) {
sbf.append(jTable1.getValueAt(rowsselected[i], colsselected[j]));
if (j < numcols - 1) sbf.append("\t");
}
sbf.append("\n");
}
stsel = new StringSelection(sbf.toString());
system = Toolkit.getDefaultToolkit().getSystemClipboard();
system.setContents(stsel, stsel);
}
if (e.getActionCommand().compareTo("Paste") == 0) {
System.out.println("Trying to Paste");
int startRow = (jTable1.getSelectedRows())[0];
int startCol = (jTable1.getSelectedColumns())[0];
try {
String trstring =
(String) (system.getContents(this).getTransferData(DataFlavor.stringFlavor));
System.out.println("String is:" + trstring);
StringTokenizer st1 = new StringTokenizer(trstring, "\n");
for (int i = 0; st1.hasMoreTokens(); i++) {
rowstring = st1.nextToken();
StringTokenizer st2 = new StringTokenizer(rowstring, "\t");
for (int j = 0; st2.hasMoreTokens(); j++) {
value = (String) st2.nextToken();
if (startRow + i < jTable1.getRowCount() && startCol + j < jTable1.getColumnCount())
jTable1.setValueAt(value, startRow + i, startCol + j);
System.out.println(
"Putting " + value + "at row = " + startRow + i + "column = " + startCol + j);
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
public static Image createImage(final JTable table, int column) {
final int height =
Math.max(20, Math.min(100, table.getSelectedRowCount() * table.getRowHeight()));
final int width = table.getColumnModel().getColumn(column).getWidth();
final BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = (Graphics2D) image.getGraphics();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f));
drawSelection(table, column, g2, width);
return image;
}