Mehrere TableModels zu einem einzigen zusammenfügen
Aus Byte-Welt Wiki
RangeTableModel
Mit folgendem Code kann man mehrere TableModels zu einem zusammenfügen, oder bestimmte Zeilen/Spaltenmengen aus einem bestehenden TableModel als ein neues, eigenständiges TableModel anbieten.
Trivialkram, aber immerhin braucht jemand, der das braucht, diesen Trivialkram dann nicht mehr selbst zu schreiben.
<code=java> import java.util.*; import javax.swing.event.*; import javax.swing.table.*;
/**
* This class provides utility methods to create special TableModels * that are composed of other TableModels, or consist of selected * subsets of rows and columns of other TableModels */
class TableModelUtils {
/**
* Creates a TableModel that composes the given TableModels into
* one. The number of rows of the resulting TableModel will be
* the maximum of all row counts of the given TableModels
*
* @param tableModels The TableModels to combine
* @return A TableModel combining the given TableModels
*/
public static TableModel createCompoundTableModel(TableModel ... tableModels)
{
return new CompoundTableModel(tableModels);
}
/**
* Creates a new TableModel which represents the "sub-table" that is
* described by the given row- and column indices
*
* @param tableModel The TableModel from which the given sub-table
* should be taken
* @param col0 The first column of the sub-table, i.e. index of the
* column in the given TableModel that should be the column with
* index 0 in the returned model
* @param row0 The first row of the sub-table, i.e. index of the
* row in the given TableModel that should be the row with
* index 0 in the returned model
* @param col1 The column index where the sub-table should end
* @param row1 The row index where the sub-table should end
* @return A sub-table of the given TableModel
*/
public static RangeTableModel createSubTableModel(TableModel tableModel, int row0, int col0, int row1, int col1)
{
return new RangeTableModel(tableModel, row0, col0, row1, col1);
}
/**
* Creates a TableModel that consists of the rows with the
* given indices of the given TableModel
*
* @param tableModel The TableModel from which the rows
* will be taken
* @param indices The indices of the rows that should be
* contained in the resulting TableModel
* @return
*/
public static TableModel createRowSelectionTableModel(TableModel tableModel, int ... indices)
{
return new SelectionTableModel(tableModel, indices, null);
}
/**
* Creates a TableModel that consists of the columns with the
* given indices of the given TableModel
*
* @param tableModel The TableModel from which the columns
* will be taken
* @param indices The indices of the columns that should be
* contained in the resulting TableModel
* @return
*/
public static TableModel createColumnSelectionTableModel(TableModel tableModel, int ... indices)
{
return new SelectionTableModel(tableModel, null, indices);
}
/**
* This class is a TableModel that combines several other TableModels
*/
private static class CompoundTableModel implements TableModel
{
/**
* The TableModels that are combined in this TableModel
*/
private List<TableModel> tableModels;
/**
* Create a new CompoundTableModel, combining the given TableModels
*
* @param tableModels The TableModels to combine
*/
public CompoundTableModel(TableModel ... tableModels)
{
this.tableModels = new ArrayList<TableModel>(Arrays.asList(tableModels));
}
/**
* {@inheritDoc}
*/
public void addTableModelListener(TableModelListener tableModelListener)
{
for (TableModel tableModel : tableModels)
{
tableModel.addTableModelListener(tableModelListener);
}
}
/**
* {@inheritDoc}
*/
public void removeTableModelListener(TableModelListener tableModelListener)
{
for (TableModel tableModel : tableModels)
{
tableModel.removeTableModelListener(tableModelListener);
}
}
/**
* {@inheritDoc}
*/
public Class getColumnClass(int columnIndex)
{
for (TableModel tableModel : tableModels)
{
if (tableModel.getColumnCount() > columnIndex)
{
return tableModel.getColumnClass(columnIndex);
}
columnIndex -= tableModel.getColumnCount();
}
throw new IllegalArgumentException("No column found for the given index");
}
/**
* {@inheritDoc}
*/
public int getColumnCount()
{
int columnCount = 0;
for (TableModel tableModel : tableModels)
{
columnCount += tableModel.getColumnCount();
}
return columnCount;
}
/**
* {@inheritDoc}
*/
public String getColumnName(int columnIndex)
{
for (TableModel tableModel : tableModels)
{
if (tableModel.getColumnCount() > columnIndex)
{
return tableModel.getColumnName(columnIndex);
}
columnIndex -= tableModel.getColumnCount();
}
throw new IllegalArgumentException("No column found for the given index");
}
/**
* {@inheritDoc}
*/
public int getRowCount()
{
int maxRowCount = -1;
for (TableModel tableModel : tableModels)
{
maxRowCount = Math.max(maxRowCount, tableModel.getRowCount());
}
return maxRowCount;
}
/**
* {@inheritDoc}
*/
public Object getValueAt(int rowIndex, int columnIndex)
{
for (TableModel tableModel : tableModels)
{
if (tableModel.getColumnCount() > columnIndex)
{
if (rowIndex < tableModel.getRowCount())
{
return tableModel.getValueAt(rowIndex, columnIndex);
}
else
{
return null;
}
}
columnIndex -= tableModel.getColumnCount();
}
throw new IllegalArgumentException("No column found for the given index");
}
/**
* {@inheritDoc}
*/
public void setValueAt(Object aValue, int rowIndex, int columnIndex)
{
for (TableModel tableModel : tableModels)
{
if (tableModel.getColumnCount() > columnIndex)
{
if (rowIndex < tableModel.getRowCount())
{
tableModel.setValueAt(aValue, rowIndex, columnIndex);
}
else
{
throw new IllegalArgumentException("No cell found for the given row index");
}
}
columnIndex -= tableModel.getColumnCount();
}
throw new IllegalArgumentException("No column found for the given index");
}
/**
* {@inheritDoc}
*/
public boolean isCellEditable(int rowIndex, int columnIndex)
{
for (TableModel tableModel : tableModels)
{
if (tableModel.getColumnCount() > columnIndex)
{
if (rowIndex < tableModel.getRowCount())
{
return tableModel.isCellEditable(rowIndex, columnIndex);
}
else
{
return false;
}
}
columnIndex -= tableModel.getColumnCount();
}
throw new IllegalArgumentException("No column found for the given index");
}
}
/**
* This class describes a TableModel which represents a selection
* of rows and columns of another TableModel
*/
private static class SelectionTableModel implements TableModel
{
/**
* The TableModel from which the rows and columns are selected
*/
private TableModel tableModel;
/**
* The selection of rows
*/
private int rowSelection[];
/**
* The selection of columns
*/
private int columnSelection[];
/**
* Creates a new SelectionTableModel, which selects the specified rows
* and columns from the given TableModel. The selections may be null.
* Then all rows/columns will be selected, respectively
*
* @param tableModel The TableModel from which the rows and columns are selected
* @param rowSelection The selection of rows
* @param columnSelection The selection of columns
*/
public SelectionTableModel(TableModel tableModel, int rowSelection[], int columnSelection[])
{
this.tableModel = tableModel;
if (rowSelection != null)
{
this.rowSelection = rowSelection.clone();
}
else
{
this.rowSelection = createSelectionFromSize(tableModel.getRowCount());
}
if (columnSelection != null)
{
this.columnSelection = columnSelection.clone();
}
else
{
this.columnSelection = createSelectionFromSize(tableModel.getColumnCount());
}
}
/**
* Creates a selection containing all indices from 0 to size-1
*
* @param size The size of the selection
* @return The selection array
*/
static int[] createSelectionFromSize(int size)
{
int selected[] = new int[size];
for (int i=0; i<selected.length; i++)
{
selected[i] = i;
}
return selected;
}
/**
* Creates a selection containing all indices from min to max-1
*
* @param min The minimum value to be selected
* @param max The maximum value to be selected
* @return The selection array
*/
static int[] createSelectionFromRange(int min, int max)
{
int selected[] = new int[max-min];
for (int i=0; i<selected.length; i++)
{
selected[i] = i + min;
}
return selected;
}
/**
* {@inheritDoc}
*/
public void addTableModelListener(TableModelListener tableModelListener)
{
tableModel.addTableModelListener(tableModelListener);
}
/**
* {@inheritDoc}
*/
public void removeTableModelListener(TableModelListener tableModelListener)
{
tableModel.removeTableModelListener(tableModelListener);
}
/**
* {@inheritDoc}
*/
public Class getColumnClass(int columnIndex)
{
return tableModel.getColumnClass(columnSelection[columnIndex]);
}
/**
* {@inheritDoc}
*/
public int getColumnCount()
{
return columnSelection.length;
}
/**
* {@inheritDoc}
*/
public String getColumnName(int columnIndex)
{
return tableModel.getColumnName(columnSelection[columnIndex]);
}
/**
* {@inheritDoc}
*/
public int getRowCount()
{
return rowSelection.length;
}
/**
* {@inheritDoc}
*/
public Object getValueAt(int rowIndex, int columnIndex)
{
return tableModel.getValueAt(rowSelection[rowIndex], columnSelection[columnIndex]);
}
/**
* {@inheritDoc}
*/
public void setValueAt(Object aValue, int rowIndex, int columnIndex)
{
tableModel.setValueAt(aValue, rowSelection[rowIndex], columnSelection[columnIndex]);
}
/**
* {@inheritDoc}
*/
public boolean isCellEditable(int rowIndex, int columnIndex)
{
return tableModel.isCellEditable(rowSelection[rowIndex], columnSelection[columnIndex]);
}
}
/**
* This class describes a TableModel which represents a range
* of rows and columns of another TableModel
*/
public static class RangeTableModel implements TableModel
{
/**
* The TableModel from which the rows and columns are selected
*/
private TableModel tableModel;
/**
* The TableModelListeners that have been added to this TableModel
*/
private List<TableModelListener> tableModelListeners = new ArrayList<TableModelListener>();
/**
* The minimum row
*/
private int minRow;
/**
* The maximum row
*/
private int maxRow;
/**
* The minimum column
*/
private int minColumn;
/**
* The maximum column
*/
private int maxColumn;
/**
* Creates a new SelectionTableModel, which selects the specified rows
* and columns from the given TableModel.
*
* @param tableModel The TableModel from which the rows and columns are selected
* @param minRow The row of the given model which will be row 0 in this model
* @param minColumn The column of the given model which will be column 0 in this model
* @param maxRow The row of the given model which will be the last row in this model
* @param maxColumn The column of the given model which will be the last column in this model
*/
public RangeTableModel(TableModel tableModel, int minRow, int minColumn, int maxRow, int maxColumn)
{
this.tableModel = tableModel;
this.minRow = minRow;
this.maxRow = maxRow;
this.minColumn = minColumn;
this.maxColumn = maxColumn;
}
/**
* Set the range that is displayed by this RangeTableModel.
*
* @param minRow The row of the given model which will be row 0 in this model
* @param minColumn The column of the given model which will be column 0 in this model
* @param maxRow The row of the given model which will be the last row in this model
* @param maxColumn The column of the given model which will be the last column in this model
*/
public void setRange(int minRow, int minColumn, int maxRow, int maxColumn)
{
this.minRow = minRow;
this.maxRow = maxRow;
this.minColumn = minColumn;
this.maxColumn = maxColumn;
if (tableModelListeners.size() > 0)
{
TableModelEvent tableModelEvent = new TableModelEvent(this, TableModelEvent.HEADER_ROW);
for (TableModelListener tableModelListener : tableModelListeners)
{
tableModelListener.tableChanged(tableModelEvent);
}
}
}
/**
* {@inheritDoc}
*/
public void addTableModelListener(TableModelListener tableModelListener)
{
tableModel.addTableModelListener(tableModelListener);
tableModelListeners.add(tableModelListener);
}
/**
* {@inheritDoc}
*/
public void removeTableModelListener(TableModelListener tableModelListener)
{
tableModel.removeTableModelListener(tableModelListener);
tableModelListeners.remove(tableModelListener);
}
/**
* {@inheritDoc}
*/
public Class getColumnClass(int columnIndex)
{
return tableModel.getColumnClass(columnIndex+minColumn);
}
/**
* {@inheritDoc}
*/
public int getColumnCount()
{
return maxColumn - minColumn + 1;
}
/**
* {@inheritDoc}
*/
public String getColumnName(int columnIndex)
{
return tableModel.getColumnName(columnIndex+minColumn);
}
/**
* {@inheritDoc}
*/
public int getRowCount()
{
return maxRow - minRow + 1;
}
/**
* {@inheritDoc}
*/
public Object getValueAt(int rowIndex, int columnIndex)
{
return tableModel.getValueAt(rowIndex + minRow, columnIndex + minColumn);
}
/**
* {@inheritDoc}
*/
public void setValueAt(Object aValue, int rowIndex, int columnIndex)
{
tableModel.setValueAt(aValue, rowIndex + minRow, columnIndex + minColumn);
}
/**
* {@inheritDoc}
*/
public boolean isCellEditable(int rowIndex, int columnIndex)
{
return tableModel.isCellEditable(rowIndex + minRow, columnIndex + minColumn);
}
}
} </code=java>
Und noch ein kleines Testprogram...
<code=java>
import java.util.*;
import java.util.List;
import javax.swing.event.*; import javax.swing.table.TableModel;
import java.awt.*; import javax.swing.*; import javax.swing.table.*;
/**
* Test class for the TableModelUtils */
class TableModelUtilsTest extends JFrame {
public static void main(String args[])
{
new TableModelUtilsTest();
}
public TableModelUtilsTest()
{
super("TableModelUtils test");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
TableModel tm0 = new DefaultTableModel(
new Object[][] {
{ "tm0 c00", "tm0 c01", "tm0 c02" },
{ "tm0 c10", "tm0 c11", "tm0 c12" },
{ "tm0 c20", "tm0 c21", "tm0 c22" } },
new Object[]
{ "tm0 h0", "tm0 h1", "tm0 h2" });
TableModel tm1 = new DefaultTableModel(
new Object[][] {
{ "tm1 c00", "tm1 c01", "tm1 c02", "tm1 c03", "tm1 c04" },
{ "tm1 c10", "tm1 c11", "tm1 c12", "tm1 c13", "tm1 c14" },
{ "tm1 c20", "tm1 c21", "tm1 c22", "tm1 c23", "tm1 c24" },
{ "tm1 c30", "tm1 c31", "tm1 c32", "tm1 c33", "tm1 c34" },
{ "tm1 c40", "tm1 c41", "tm1 c42", "tm1 c43", "tm1 c44" } },
new Object[]
{ "tm1 h0", "tm1 h1", "tm1 h2", "tm1 h3" , "tm1 h4" });
JPanel p = new JPanel();
p.setLayout(new BoxLayout(p, BoxLayout.X_AXIS));
p.add(createPanel("Input model 0", tm0));
p.add(createPanel("Input model 1", tm1));
p.add(createRangePanel(TableModelUtils.createSubTableModel(tm1, 0,0,4,4)));
p.add(createPanel("Compound of model 0 and model 1",
TableModelUtils.createCompoundTableModel(tm0, tm1)));
p.add(createPanel("Sub(1,1,4,4) of model 1",
TableModelUtils.createSubTableModel(tm1, 1,1,4,4)));
p.add(createPanel("RowSelection(0,2,4) of model 1",
TableModelUtils.createRowSelectionTableModel(tm1, 0,2,4)));
p.add(createPanel("ColumnSelection(0,2,4) of model 1",
TableModelUtils.createColumnSelectionTableModel(tm1, 0,2,4)));
TableModel tableModel = null;
tableModel = TableModelUtils.createCompoundTableModel(tm0, tm1);
tableModel = TableModelUtils.createSubTableModel(tableModel, 1,1,4,5);
tableModel = TableModelUtils.createRowSelectionTableModel(tableModel, 0,2);
tableModel = TableModelUtils.createColumnSelectionTableModel(tableModel, 0,2,4);
p.add(createPanel("<html>ColumnSelection(0,2,4) of "+"RowSelection(0,2) of " +
"Sub(1,1,4,4) of " + "Compound of model 0 and model 1",tableModel));
getContentPane().add(new JScrollPane(p));
setSize(800,300);
setVisible(true);
}
private JPanel createPanel(String infoString, TableModel tableModel)
{
JPanel panel = new JPanel(new BorderLayout());
JLabel label = new JLabel(infoString);
panel.add(label, BorderLayout.NORTH);
panel.add(new JScrollPane(new JTable(tableModel)), BorderLayout.CENTER);
return panel;
}
private JPanel createRangePanel(final TableModelUtils.RangeTableModel tableModel)
{
JPanel panel = new JPanel(new BorderLayout());
JPanel p = new JPanel(new BorderLayout());
p.add(new JLabel("Selection of range"), BorderLayout.NORTH);
JPanel controlPanel = new JPanel(new GridLayout(2,0));
final JSpinner minRow = createSpinner(0, 0, tableModel.getRowCount()-1);
final JSpinner minCol = createSpinner(0, 0, tableModel.getColumnCount()-1);
final JSpinner maxRow = createSpinner(tableModel.getRowCount()-1, 0, tableModel.getRowCount()-1);
final JSpinner maxCol = createSpinner(tableModel.getColumnCount()-1, 0, tableModel.getColumnCount()-1);
ChangeListener changeListener = new ChangeListener()
{
public void stateChanged(ChangeEvent e)
{
int minR = (Integer)minRow.getValue();
int minC = (Integer)minCol.getValue();
int maxR = (Integer)maxRow.getValue();
int maxC = (Integer)maxCol.getValue();
tableModel.setRange(minR, minC, maxR, maxC);
}
};
minRow.addChangeListener(changeListener);
minCol.addChangeListener(changeListener);
maxRow.addChangeListener(changeListener);
maxCol.addChangeListener(changeListener);
controlPanel.add(new JLabel("Min. row", JLabel.CENTER));
controlPanel.add(minRow);
controlPanel.add(new JLabel("Min. col", JLabel.CENTER));
controlPanel.add(minCol);
controlPanel.add(new JLabel("Max. row", JLabel.CENTER));
controlPanel.add(maxRow);
controlPanel.add(new JLabel("Max. col", JLabel.CENTER));
controlPanel.add(maxCol);
p.add(controlPanel, BorderLayout.CENTER);
panel.add(p, BorderLayout.NORTH);
panel.add(new JScrollPane(new JTable(tableModel)), BorderLayout.CENTER);
return panel; }
private JSpinner createSpinner(int initial, int min, int max)
{
SpinnerModel model = new SpinnerNumberModel(initial, min, max, 1);
JSpinner spinner = new JSpinner(model);
return spinner;
}
} </code=java>
Nachbetrachtung
Eigentlich wär's ja noch schick, das ganze in dem Sinne "mächtiger" zu machen, dass man sowas wie die hintereinanderschaltbaren {JAPI|RowFilter} (und entsprechende {JAPI|ColumnFilter}) einbaut, aber ... da das ja keiner braucht.... </code=java> --Marco13 27.08.2008, 19:39
