TreeTable
Aus Byte-Welt Wiki
Version vom 27. März 2009, 23:43 Uhr von AndreUhres (Diskussion | Beiträge)
Hier ist eine einfache Implementation einer TreeTable (gem. Alexandru Toth), die ein gemeinsames Model für JTree und JTable benutzt. Es ist dann kein Problem mehr, dynamisch neue Zeilen hinzuzufügen:
<code=java>package treetable;
import java.awt.Color; import java.awt.Dimension; import java.awt.Rectangle; import java.util.Enumeration; import javax.swing.*; import javax.swing.table.*; import javax.swing.tree.DefaultMutableTreeNode;
/** JTable that has different renderers depending on the classes in TreeModel */ public class Table extends JTable {
void registerRenderers() {
setDefaultRenderer(Color.class, new TableColorRenderer(Color.WHITE));
setUI(new UIMultiSpan());
}
public Table() {
super();
registerRenderers(); }
public Table(TableModel dm) {
super(dm);
registerRenderers(); }
public Table(TableModel dm, TableColumnModel cm) {
super(dm, cm);
registerRenderers(); }
@Override
public TableCellRenderer getCellRenderer(int row, int column) {
Object value = getModel().getValueAt(row, column);
/** enable to have custom renderers depending on class of cell */
TableCellRenderer tcr = getDefaultRenderer(value.getClass());
return tcr; }
@Override
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;
}
int index = 0;
int columnMargin = getColumnModel().getColumnMargin();
Rectangle cellFrame = new Rectangle();
if (column > 0 && shouldCombineCells(row)) {
return cellFrame;
}
int aCellHeight = rowHeight;
cellFrame.y = row * aCellHeight;
cellFrame.height = aCellHeight;
Enumeration enumeration = getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
TableColumn aColumn = (TableColumn) enumeration.nextElement();
cellFrame.width = aColumn.getWidth() + columnMargin;
if (index == column) {
break;
}
cellFrame.x += cellFrame.width;
index++;
}
while (enumeration.hasMoreElements() && shouldCombineCells(row)) {
TableColumn aColumn = (TableColumn) enumeration.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 boolean shouldCombineCells(int row) {
TableAdapter model = (TableAdapter) getModel();
JTree tree = model.getTree();
DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getPathForRow(row).getLastPathComponent();
return node.getLevel() < 2;
}
}</code=java>
<code=java>package treetable; /* JTree already has a good data model (DefaultTreeModel), and it's easier to implement an adapter that simply puts a TableModel on top of the TreeModel, rather than to implement JTree renderers in a JTable and work around the API to achieve correct displays.
The class "TableAdapter" puts an AbstractTableModel on top of DefaultTreeModel which is suggested by Swing for a JTree. The TableModel consists of the dataRow vector from "TableNode". The TableAdapter is also responsible for firing updates on the table data in case the JTree is collapsed or expanded.
- /
import javax.swing.*; import javax.swing.event.*; import javax.swing.tree.*; import javax.swing.table.*; import java.util.Vector;
public class TableAdapter extends AbstractTableModel {
private JTree tree; private JTable table; private int[] sel_rows; private ListSelectionListener selectionListener;
public TableAdapter(JTree t) {
tree = t;
tree.addTreeExpansionListener(new TreeExpansionListener() {
public void treeExpanded(TreeExpansionEvent event) {
fireTableDataChanged();
select();
}
public void treeCollapsed(TreeExpansionEvent event) {
fireTableDataChanged();
select();
}
});
}
public void addTable(JTable t) {
table = t;
tree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent e) {
sel_rows = tree.getSelectionRows();
select();
}
});
selectionListener = new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
int row = table.getSelectedRow();
tree.setSelectionRow(row);
table.repaint();
}
};
table.getSelectionModel().addListSelectionListener(selectionListener);
}
public JTree getTree() {
return tree;
}
private void select() {
if (sel_rows != null) {
table.getSelectionModel().setSelectionInterval(sel_rows[0], sel_rows[0]);
}
}
//assumes all nodes have same number of items as root node
public int getColumnCount() {
DefaultMutableTreeNode root = (DefaultMutableTreeNode) tree.getModel().getRoot();
TableNode n = (TableNode) root.getUserObject();
return n.getDataRow().size();
}
public int getRowCount() {
return tree.getRowCount();
}
@Override
public String getColumnName(int col) {
return new String("col" + col);
}
public Object getValueAt(int row, int col) {
TreePath tPath = tree.getPathForRow(row);
Object[] oPath = tPath.getPath();
int len = oPath.length;
DefaultMutableTreeNode node = (DefaultMutableTreeNode) oPath[len - 1];
TableNode treeNode = (TableNode) node.getUserObject();
Vector dataRow = treeNode.getDataRow();
return dataRow.elementAt(col); }
@Override
public void setValueAt(Object value, int row, int col) {
TreePath tPath = tree.getPathForRow(row);
Object[] oPath = tPath.getPath();
int len = oPath.length;
DefaultMutableTreeNode node = (DefaultMutableTreeNode) oPath[len - 1];
TableNode treeNode = (TableNode) node.getUserObject();
Vector dataRow = treeNode.getDataRow();
dataRow.setElementAt(value, col);
}
@Override
public Class getColumnClass(int c) {
DefaultMutableTreeNode root = (DefaultMutableTreeNode) tree.getModel().getRoot();
TableNode n = (TableNode) root.getUserObject();
return n.getDataRow().elementAt(c).getClass();
}
@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
return false;
}
}</code=java>
<code=java>package treetable;
import java.awt.*; import javax.swing.*; import javax.swing.table.*; import javax.swing.border.*;
public class TableColorRenderer extends JLabel implements TableCellRenderer {
Border unselectedBorder = null; Border selectedBorder = null; boolean isBordered = true;
public TableColorRenderer(Color color) {
super();
setOpaque(true);
setBackground(color);
}
public Component getTableCellRendererComponent(
JTable table, Object value,
boolean isSelected, boolean hasFocus,
int row, int column) {
if (isSelected) {
if (selectedBorder == null) {
selectedBorder = BorderFactory.createMatteBorder(2, 5, 2, 5,
table.getSelectionBackground());
}
setBorder(selectedBorder);
} else {
if (unselectedBorder == null) {
unselectedBorder = BorderFactory.createMatteBorder(2, 5, 2, 5,
table.getBackground());
}
setBorder(unselectedBorder);
}
if (value.getClass() == Color.class) {
setBackground((Color) value);
} else {
setBackground(Color.WHITE);
}
return this;
}
}
</code=java>
<code=java>package treetable; /* TreeModels contain DefaultMutableTreeNodes. Each DefaultMutableTreeNode contains a UserObject for which we can easily create a class "TableNode" having a String to be displayed in the JTree, and a vector of objects to be displayed in the JTable.
- /
import java.util.*;
public class TableNode {
private String label; private Vector dataRow;
public TableNode(String s, Object x, Object y) {
label = s;
dataRow = new Vector();
dataRow.add(x);
dataRow.add(y);
}
@Override
public String toString() {
return label;
}
public Vector getDataRow() {
return dataRow;
}
}</code=java>
<code=java>package treetable;
import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.tree.*; import javax.swing.table.*;
public class TreeTable extends JFrame {
private DefaultMutableTreeNode root; TreeTablePanel[] treeTablePanels;
public TreeTable() {
super("Tree Table Demo");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DefaultTreeModel model = new DefaultTreeModel(createTree());
setLayout(new GridLayout(0, 1));
treeTablePanels = new TreeTablePanel[1];
for (int i = 0; i < treeTablePanels.length; i++) {
treeTablePanels[i] = new TreeTablePanel(model, treeTablePanels);
add(treeTablePanels[i]);
}
setSize(1000, 300);
setLocationRelativeTo(null);
}
private DefaultMutableTreeNode createTree() {
// create root node and add more nodes
root = new DefaultMutableTreeNode(new TableNode("Erde", "Die Erde ist mit einer durchschnittlichen Sonnenentfernung von 149,6 Millionen km von der Sonne aus der dritte Planet im Sonnensystem.", Color.YELLOW));
DefaultMutableTreeNode n = new DefaultMutableTreeNode(new TableNode("Europa", "Europa (griechisch Εὐρώπη, Eurṓpē) ist das westliche Fünftel der eurasischen Landmasse. ", Color.GREEN));
root.add(n);
DefaultMutableTreeNode n1 = new DefaultMutableTreeNode(new TableNode("Finnland", "5,3 Millionen Einwohner", Color.ORANGE));
n.add(n1);
n1 = new DefaultMutableTreeNode(new TableNode("Rumänien", "21,5 Millionen Einwohner", Color.RED));
n.add(n1);
n1 = new DefaultMutableTreeNode(new TableNode("Deutschland", "82 Millionen Einwohner", Color.BLUE));
n.add(n1);
n = new DefaultMutableTreeNode(new TableNode("Amerika", "Der amerikanische Doppelkontinent erstreckt sich in seiner Nord-Südachse vom 83. Breitengrad Nord (Kap Columbia) bis zum 56. Breitengrad Süd (Kap Hoorn).", Color.WHITE));
root.add(n);
n = new DefaultMutableTreeNode(new TableNode("Asien", "Asien ist mit rund 44,5 Mio. km² der größte Kontinent und Teil von Eurasien.", Color.MAGENTA));
root.add(n);
return root; }
public static void main(final String[] args) {
Runnable gui = new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception ex) {
ex.printStackTrace();
}
new TreeTable().setVisible(true);
}
};
//GUI must start on EventDispatchThread:
SwingUtilities.invokeLater(gui);
}
class TreeTablePanel extends JPanel implements TableModelListener {
private JTree tree;
private Rectangle selectedRowBounds;
private Color selectionColor;
private TableAdapter adapter;
private Table table;
private JSplitPane splitPane;
private JTableHeader tableHeader;
private JButton btAdd;
private TreeTablePanel[] treeTablePanels;
public TreeTablePanel(DefaultTreeModel model, TreeTablePanel[] treeTablePanels) {
super(new BorderLayout());
this.treeTablePanels = treeTablePanels;
tree = new JTree(model) {
//Override paintComponent of JTree:
@Override
public void paintComponent(final Graphics g) {
if (selectedRowBounds != null) {
//Set selection Color:
g.setColor(selectionColor);
//Draw selection rectangle using the width of JTree:
g.fillRect(0, (int) selectedRowBounds.getY(), getWidth(), (int) selectedRowBounds.getHeight());
}
super.paintComponent(g);
}
};
adapter = new TableAdapter(tree);
table = new Table(adapter);
customizeTable(table);
customizeTree(tree, table);
customizeSplitpane(tree, table);
adapter.addTableModelListener(this);
//
JScrollPane scrollPane = new JScrollPane(splitPane);
add(scrollPane, BorderLayout.CENTER);
JPanel header = new JPanel(null);
tableHeader = table.getTableHeader();
header.add(tableHeader);
header.setPreferredSize(new Dimension(0, 16));
add(header, BorderLayout.NORTH);
btAdd = new JButton();
add(btAdd, BorderLayout.SOUTH);
btAdd.setAction(new AbstractAction("Add") {
public void actionPerformed(ActionEvent e) {
DefaultMutableTreeNode n = new DefaultMutableTreeNode(new TableNode("NEW", "", Color.GREEN));
DefaultMutableTreeNode parent = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (parent != null) {
parent.add(n);
((DefaultTreeModel) tree.getModel()).nodeStructureChanged(parent);
table.repaint();
validate();
}
}
});
}
private void customizeTable(final JTable table) {
table.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
//connect Selection listeners
adapter.addTable(table);
table.setRowHeight(18);
table.addComponentListener(new ComponentAdapter() {
@Override
public void componentResized(ComponentEvent e) {
Point loc = table.getLocationOnScreen();
tableHeader.setBounds(new Rectangle(loc.x - TreeTable.this.getLocation().x - 3, 0, 1100, 18));
tableHeader.setReorderingAllowed(false);
}
});
}
private void customizeTree(final JTree tree, final JTable table) {
tree.setRowHeight(table.getRowHeight());
tree.setFocusable(false);
selectionColor = table.getSelectionBackground();
tree.putClientProperty("JTree.lineStyle", "Horizontal");
tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setOpaque(false);
//Adapt the default selection colors:
DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tree.getCellRenderer();
renderer.setBorderSelectionColor(Color.WHITE);
renderer.setBackgroundSelectionColor(new Color(0, 0, 0, 0));
//Add the TreeSelectionListener:
TreeSelectionModel selectionModel = tree.getSelectionModel();
selectionModel.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(final TreeSelectionEvent e) {
paintSelectionRect();
}
});
//Add the TreeExpansionListener:
tree.addTreeExpansionListener(new TreeExpansionListener() {
public void treeCollapsed(final TreeExpansionEvent event) {
paintSelectionRect();
}
public void treeExpanded(final TreeExpansionEvent event) {
paintSelectionRect();
}
});
//Add MouseListener if you want to listen to whole line width:
tree.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(final MouseEvent e) {
int row = tree.getClosestRowForLocation(e.getX(), e.getY());
if (e.getClickCount() == 2) {
if (tree.isCollapsed(row)) {
tree.expandRow(row);
} else {
tree.collapseRow(row);
}
} else {
tree.setSelectionRow(row);
}
}
});
}
private void customizeSplitpane(final JTree tree, final JTable table) {
splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, tree, table);
splitPane.setDividerLocation(150);
splitPane.setBackground(Color.WHITE);
splitPane.setContinuousLayout(true);
}
//This method is called in valueChanged, treeCollapsed and treeExpanded
//to paint the selection rectangle:
private void paintSelectionRect() {
//Get selected row bounds:
int[] rows = tree.getSelectionRows();
if (rows == null) {
selectedRowBounds = null;
return;
}
selectedRowBounds = tree.getRowBounds(rows[0]);
//Repaint the JTree:
tree.repaint();
}
public void tableChanged(TableModelEvent e) {
for (TreeTablePanel treeTablePanel : treeTablePanels) {
treeTablePanel.getTable().repaint();
}
}
public Table getTable() {
return table;
}
}
}</code=java>
<code=java>package treetable; /*
* UIMultiSpan.java * */
import java.awt.*; import javax.swing.*; import javax.swing.table.*; import javax.swing.plaf.basic.*;
public class UIMultiSpan extends BasicTableUI {
@Override
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;
int numColumns = table.getColumnCount();
for (int column = 0; column < numColumns; column++) {
Rectangle cellRect = table.getCellRect(row, column, true);
int cellRow, cellColumn;
cellRow = row;
cellColumn = column;
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) {
TableCellRenderer renderer = table.getCellRenderer(row, column);
if (renderer == null) {
return;
}
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 - 1, cellRect.height - 1, true);
Color c = g.getColor();
g.setColor(table.getGridColor());
g.drawRect(cellRect.x - 1, cellRect.y - 1, cellRect.width, cellRect.height);
g.setColor(c);
}
}</code=java>
