в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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2010-05-31T15:31:56Z

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== Creating a Custom Column Header Renderer in a JTable Component ==



<source lang="java">
import java.awt.ruponent;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
public class Main {
public static void main(String[] argv) throws Exception {
JTable table = new JTable();
int vColIndex = 0;
TableColumn col = table.getColumnModel().getColumn(vColIndex);
col.setHeaderRenderer(new MyTableHeaderRenderer());
}
}
class MyTableHeaderRenderer extends JLabel implements TableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int rowIndex, int vColIndex) {
setText(value.toString());
setToolTipText((String) value);
return this;
}
}</source>



== Customizing a JTableHeader Look and Feel ==

Property StringObject TypeTableHeader.backgroundColorTableHeader.cellBorderBorderTableHeader.fontFontTableHeader.foregroundColorTableHeaderUIString

== Customizing Column Headers with Icons ==



<source lang="java">
import java.awt.BorderLayout;
import java.awt.ruponent;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
class JComponentTableCellRenderer implements TableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
return (JComponent) value;
}
}
public class LabelHeaderSample {
public static void main(String args[]) {
final Object rows[][] = { { "one", "1" }, { "two", "2" }, { "three", "3" } };
JFrame frame = new JFrame("Label Header");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

String headers[] = { "English", "#" };
JTable table = new JTable(rows, headers);
JScrollPane scrollPane = new JScrollPane(table);
Icon redIcon = new ImageIcon("yourFile.gif");
Icon blueIcon = new ImageIcon("yourFile.gif");
Border headerBorder = UIManager.getBorder("TableHeader.cellBorder");
JLabel blueLabel = new JLabel(headers[0], blueIcon, JLabel.CENTER);
blueLabel.setBorder(headerBorder);
JLabel redLabel = new JLabel(headers[1], redIcon, JLabel.CENTER);
redLabel.setBorder(headerBorder);
TableCellRenderer renderer = new JComponentTableCellRenderer();
TableColumnModel columnModel = table.getColumnModel();
TableColumn column0 = columnModel.getColumn(0);
TableColumn column1 = columnModel.getColumn(1);
column0.setHeaderRenderer(renderer);
column0.setHeaderValue(blueLabel);
column1.setHeaderRenderer(renderer);
column1.setHeaderValue(redLabel);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}</source>



== Hiding column headers: table.setTableHeader(null); ==



<source lang="java">
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
public class NullColumnHeader {
public static void main(String args[]) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Object rowData[][] = { { "Row1-Column1", "Row1-Column2", "Row1-Column3" },
{ "Row2-Column1", "Row2-Column2", "Row2-Column3" } };
Object columnNames[] = { "1", "2", "3" };
JTable table = new JTable(rowData, columnNames);
JScrollPane scrollPane = new JScrollPane(table);
table.setTableHeader(null);

frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}</source>



<p>You could also remove headers by subclassing JTable and overriding the protected
configureEnclosingScrollPane() method, or by telling every TableColumn that its
header value is empty.</p>

== Implementing Variable-Height Column Headers in a JTable Component ==



<source lang="java">
import java.awt.ruponent;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
public class Main {
public static void main(String[] argv) throws Exception {
DefaultTableModel model = new DefaultTableModel();
JTable table = new JTable(model);
model.addColumn("Col1");
model.addColumn("Icon Here");
table.getColumnModel().getColumn(0).setHeaderValue(new ImageIcon("image.gif"));
table.getColumnModel().getColumn(0).setHeaderRenderer(new IconHeaderRenderer());
}
}
class IconHeaderRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
if (table != null) {
JTableHeader header = table.getTableHeader();
if (header != null) {
setForeground(header.getForeground());
setBackground(header.getBackground());
setFont(header.getFont());
}
}
if (value instanceof Icon) {
setIcon((Icon) value);
setText("");
} else {
setText((value == null) ? "" : value.toString());
setIcon(null);
}
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
setHorizontalAlignment(JLabel.CENTER);
return this;
}
}</source>



== Listening for Clicks on a Column Header in a JTable Component ==



<source lang="java">
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JTable;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumnModel;
public class Main {
public static void main(String[] argv) throws Exception {
JTable table = new JTable(5, 5);
JTableHeader header = table.getTableHeader();
header.addMouseListener(new ColumnHeaderListener());
}
}
class ColumnHeaderListener extends MouseAdapter {
public void mouseClicked(MouseEvent evt) {
JTable table = ((JTableHeader) evt.getSource()).getTable();
TableColumnModel colModel = table.getColumnModel();
int index = colModel.getColumnIndexAtX(evt.getX());
if (index == -1) {
return;
}
Rectangle headerRect = table.getTableHeader().getHeaderRect(index);
if (index == 0) {
headerRect.width -= 10;
} else {
headerRect.grow(-10, 0);
}
if (!headerRect.contains(evt.getX(), evt.getY())) {
int vLeftColIndex = index;
if (evt.getX() < headerRect.x) {
vLeftColIndex--;
}
}
}
}</source>



== Removing Column Headers: provide empty strings as the column header names. ==



<source lang="java">
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
public class EmptyColumnHeader {
public static void main(String args[]) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Object rowData[][] = { { "Row1-Column1", "Row1-Column2", "Row1-Column3" },
{ "Row2-Column1", "Row2-Column2", "Row2-Column3" } };
Object columnNames[] = { "", "", "" };
JTable table = new JTable(rowData, columnNames);
JScrollPane scrollPane = new JScrollPane(table);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}</source>



== Removing the Column Headers from a Scrollable in a JTable Component ==



<source lang="java">
import javax.swing.JTable;
public class Main {
public static void main(String[] argv) throws Exception {
JTable table = new JTable();
// Remove the column headers
table.setTableHeader(null);
}
}</source>



== Setting Column Header Tool Tips in a JTable Components ==



<source lang="java">
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.util.HashMap;
import java.util.Map;
import javax.swing.JTable;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class Main {
public static void main(String[] argv) throws Exception {
int rows = 10;
int cols = 5;
JTable table = new JTable(rows, cols);
JTableHeader header = table.getTableHeader();
ColumnHeaderToolTips tips = new ColumnHeaderToolTips();
for (int c = 0; c < table.getColumnCount(); c++) {
TableColumn col = table.getColumnModel().getColumn(c);
tips.setToolTip(col, "Col " + c);
}
header.addMouseMotionListener(tips);
}
}
class ColumnHeaderToolTips extends MouseMotionAdapter {
TableColumn curCol;
Map tips = new HashMap();
public void setToolTip(TableColumn col, String tooltip) {
if (tooltip == null) {
tips.remove(col);
} else {
tips.put(col, tooltip);
}
}
public void mouseMoved(MouseEvent evt) {
JTableHeader header = (JTableHeader) evt.getSource();
JTable table = header.getTable();
TableColumnModel colModel = table.getColumnModel();
int vColIndex = colModel.getColumnIndexAtX(evt.getX());
TableColumn col = null;
if (vColIndex >= 0) {
col = colModel.getColumn(vColIndex);
}
if (col != curCol) {
header.setToolTipText((String) tips.get(col));
curCol = col;
}
}
}</source>



== Showing the Table Header in a Non-Scrollable JTable Component ==



<source lang="java">
import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.table.JTableHeader;
public class Main {
public static void main(String[] argv) throws Exception {
int rows = 10;
int cols = 5;
JTable table = new JTable(rows, cols);
JTableHeader header = table.getTableHeader();
JPanel container = new JPanel(new BorderLayout());
// Add header in NORTH slot
container.add(header, BorderLayout.NORTH);
// Add table itself to CENTER slot
container.add(table, BorderLayout.CENTER);
}
}</source>



== Using Tooltips in Table Headers: Showing Tooltip Text in a Table Header ==



<source lang="java">
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class LabelHeaderSample {
public static void main(String args[]) {
final Object rows[][] = { { "one", "1" }, { "two", "2" }, { "three", "3" } };
JFrame frame = new JFrame("Label Header");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

String headers[] = { "English", "#" };
JTable table = new JTable(rows, headers);
JScrollPane scrollPane = new JScrollPane(table);
JLabel headerRenderer = new DefaultTableCellRenderer();
String columnName = table.getModel().getColumnName(0);
headerRenderer.setText(columnName);
headerRenderer.setToolTipText("text");
TableColumnModel columnModel = table.getColumnModel();
TableColumn englishColumn = columnModel.getColumn(0);
englishColumn.setHeaderRenderer((TableCellRenderer)headerRenderer);

frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}</source>

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в 17:44, 31 мая 2010

Admin: 1 версия