Java tutorial
/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of Sun Microsystems nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * TableFilterDemo.java requires SpringUtilities.java */ import java.awt.Component; import java.awt.Container; import java.awt.Dimension; import javax.swing.BoxLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.ListSelectionModel; import javax.swing.RowFilter; import javax.swing.Spring; import javax.swing.SpringLayout; import javax.swing.SwingConstants; import javax.swing.event.DocumentEvent; import javax.swing.event.DocumentListener; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; import javax.swing.table.AbstractTableModel; import javax.swing.table.TableRowSorter; public class TableFilterDemo extends JPanel { private boolean DEBUG = false; private JTable table; private JTextField filterText; private JTextField statusText; private TableRowSorter<MyTableModel> sorter; public TableFilterDemo() { super(); setLayout(new BoxLayout(this, BoxLayout.Y_AXIS)); // Create a table with a sorter. MyTableModel model = new MyTableModel(); sorter = new TableRowSorter<MyTableModel>(model); table = new JTable(model); table.setRowSorter(sorter); table.setPreferredScrollableViewportSize(new Dimension(500, 70)); table.setFillsViewportHeight(true); // For the purposes of this example, better to have a single // selection. table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); // When selection changes, provide user with row numbers for // both view and model. table.getSelectionModel().addListSelectionListener(new ListSelectionListener() { public void valueChanged(ListSelectionEvent event) { int viewRow = table.getSelectedRow(); if (viewRow < 0) { // Selection got filtered away. statusText.setText(""); } else { int modelRow = table.convertRowIndexToModel(viewRow); statusText.setText(String.format("Selected Row in view: %d. " + "Selected Row in model: %d.", viewRow, modelRow)); } } }); // Create the scroll pane and add the table to it. JScrollPane scrollPane = new JScrollPane(table); // Add the scroll pane to this panel. add(scrollPane); // Create a separate form for filterText and statusText JPanel form = new JPanel(new SpringLayout()); JLabel l1 = new JLabel("Filter Text:", SwingConstants.TRAILING); form.add(l1); filterText = new JTextField(); // Whenever filterText changes, invoke newFilter. filterText.getDocument().addDocumentListener(new DocumentListener() { public void changedUpdate(DocumentEvent e) { newFilter(); } public void insertUpdate(DocumentEvent e) { newFilter(); } public void removeUpdate(DocumentEvent e) { newFilter(); } }); l1.setLabelFor(filterText); form.add(filterText); JLabel l2 = new JLabel("Status:", SwingConstants.TRAILING); form.add(l2); statusText = new JTextField(); l2.setLabelFor(statusText); form.add(statusText); SpringUtilities.makeCompactGrid(form, 2, 2, 6, 6, 6, 6); add(form); } /** * Update the row filter regular expression from the expression in the text * box. */ private void newFilter() { RowFilter<MyTableModel, Object> rf = null; // If current expression doesn't parse, don't update. try { rf = RowFilter.regexFilter(filterText.getText(), 0); } catch (java.util.regex.PatternSyntaxException e) { return; } sorter.setRowFilter(rf); } class MyTableModel extends AbstractTableModel { private String[] columnNames = { "First Name", "Last Name", "Sport", "# of Years", "Vegetarian" }; private Object[][] data = { { "Mary", "Campione", "Snowboarding", new Integer(5), new Boolean(false) }, { "Alison", "Huml", "Rowing", new Integer(3), new Boolean(true) }, { "Kathy", "Walrath", "Knitting", new Integer(2), new Boolean(false) }, { "Sharon", "Zakhour", "Speed reading", new Integer(20), new Boolean(true) }, { "Philip", "Milne", "Pool", new Integer(10), new Boolean(false) }, }; public int getColumnCount() { return columnNames.length; } public int getRowCount() { return data.length; } public String getColumnName(int col) { return columnNames[col]; } public Object getValueAt(int row, int col) { return data[row][col]; } /* * JTable uses this method to determine the default renderer/ editor for * each cell. If we didn't implement this method, then the last column would * contain text ("true"/"false"), rather than a check box. */ public Class getColumnClass(int c) { return getValueAt(0, c).getClass(); } /* * Don't need to implement this method unless your table's editable. */ public boolean isCellEditable(int row, int col) { // Note that the data/cell address is constant, // no matter where the cell appears onscreen. if (col < 2) { return false; } else { return true; } } /* * Don't need to implement this method unless your table's data can change. */ public void setValueAt(Object value, int row, int col) { if (DEBUG) { System.out.println("Setting value at " + row + "," + col + " to " + value + " (an instance of " + value.getClass() + ")"); } data[row][col] = value; fireTableCellUpdated(row, col); if (DEBUG) { System.out.println("New value of data:"); printDebugData(); } } private void printDebugData() { int numRows = getRowCount(); int numCols = getColumnCount(); for (int i = 0; i < numRows; i++) { System.out.print(" row " + i + ":"); for (int j = 0; j < numCols; j++) { System.out.print(" " + data[i][j]); } System.out.println(); } System.out.println("--------------------------"); } } /** * Create the GUI and show it. For thread safety, this method should be * invoked from the event-dispatching thread. */ private static void createAndShowGUI() { // Create and set up the window. JFrame frame = new JFrame("TableFilterDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Create and set up the content pane. TableFilterDemo newContentPane = new TableFilterDemo(); newContentPane.setOpaque(true); // content panes must be opaque frame.setContentPane(newContentPane); // Display the window. frame.pack(); frame.setVisible(true); } public static void main(String[] args) { // Schedule a job for the event-dispatching thread: // creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } } /* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: - * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. - Redistributions in binary * form must reproduce the above copyright notice, this list of conditions and * the following disclaimer in the documentation and/or other materials provided * with the distribution. - Neither the name of Sun Microsystems nor the names * of its contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /** * A 1.4 file that provides utility methods for creating form- or grid-style * layouts with SpringLayout. These utilities are used by several programs, such * as SpringBox and SpringCompactGrid. */ class SpringUtilities { /** * A debugging utility that prints to stdout the component's minimum, * preferred, and maximum sizes. */ public static void printSizes(Component c) { System.out.println("minimumSize = " + c.getMinimumSize()); System.out.println("preferredSize = " + c.getPreferredSize()); System.out.println("maximumSize = " + c.getMaximumSize()); } /** * Aligns the first <code>rows</code> * <code>cols</code> components of * <code>parent</code> in a grid. Each component is as big as the maximum * preferred width and height of the components. The parent is made just big * enough to fit them all. * * @param rows * number of rows * @param cols * number of columns * @param initialX * x location to start the grid at * @param initialY * y location to start the grid at * @param xPad * x padding between cells * @param yPad * y padding between cells */ public static void makeGrid(Container parent, int rows, int cols, int initialX, int initialY, int xPad, int yPad) { SpringLayout layout; try { layout = (SpringLayout) parent.getLayout(); } catch (ClassCastException exc) { System.err.println("The first argument to makeGrid must use SpringLayout."); return; } Spring xPadSpring = Spring.constant(xPad); Spring yPadSpring = Spring.constant(yPad); Spring initialXSpring = Spring.constant(initialX); Spring initialYSpring = Spring.constant(initialY); int max = rows * cols; // Calculate Springs that are the max of the width/height so that all // cells have the same size. Spring maxWidthSpring = layout.getConstraints(parent.getComponent(0)).getWidth(); Spring maxHeightSpring = layout.getConstraints(parent.getComponent(0)).getWidth(); for (int i = 1; i < max; i++) { SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i)); maxWidthSpring = Spring.max(maxWidthSpring, cons.getWidth()); maxHeightSpring = Spring.max(maxHeightSpring, cons.getHeight()); } // Apply the new width/height Spring. This forces all the // components to have the same size. for (int i = 0; i < max; i++) { SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i)); cons.setWidth(maxWidthSpring); cons.setHeight(maxHeightSpring); } // Then adjust the x/y constraints of all the cells so that they // are aligned in a grid. SpringLayout.Constraints lastCons = null; SpringLayout.Constraints lastRowCons = null; for (int i = 0; i < max; i++) { SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i)); if (i % cols == 0) { // start of new row lastRowCons = lastCons; cons.setX(initialXSpring); } else { // x position depends on previous component cons.setX(Spring.sum(lastCons.getConstraint(SpringLayout.EAST), xPadSpring)); } if (i / cols == 0) { // first row cons.setY(initialYSpring); } else { // y position depends on previous row cons.setY(Spring.sum(lastRowCons.getConstraint(SpringLayout.SOUTH), yPadSpring)); } lastCons = cons; } // Set the parent's size. SpringLayout.Constraints pCons = layout.getConstraints(parent); pCons.setConstraint(SpringLayout.SOUTH, Spring.sum(Spring.constant(yPad), lastCons.getConstraint(SpringLayout.SOUTH))); pCons.setConstraint(SpringLayout.EAST, Spring.sum(Spring.constant(xPad), lastCons.getConstraint(SpringLayout.EAST))); } /* Used by makeCompactGrid. */ private static SpringLayout.Constraints getConstraintsForCell(int row, int col, Container parent, int cols) { SpringLayout layout = (SpringLayout) parent.getLayout(); Component c = parent.getComponent(row * cols + col); return layout.getConstraints(c); } /** * Aligns the first <code>rows</code> * <code>cols</code> components of * <code>parent</code> in a grid. Each component in a column is as wide as * the maximum preferred width of the components in that column; height is * similarly determined for each row. The parent is made just big enough to * fit them all. * * @param rows * number of rows * @param cols * number of columns * @param initialX * x location to start the grid at * @param initialY * y location to start the grid at * @param xPad * x padding between cells * @param yPad * y padding between cells */ public static void makeCompactGrid(Container parent, int rows, int cols, int initialX, int initialY, int xPad, int yPad) { SpringLayout layout; try { layout = (SpringLayout) parent.getLayout(); } catch (ClassCastException exc) { System.err.println("The first argument to makeCompactGrid must use SpringLayout."); return; } // Align all cells in each column and make them the same width. Spring x = Spring.constant(initialX); for (int c = 0; c < cols; c++) { Spring width = Spring.constant(0); for (int r = 0; r < rows; r++) { width = Spring.max(width, getConstraintsForCell(r, c, parent, cols).getWidth()); } for (int r = 0; r < rows; r++) { SpringLayout.Constraints constraints = getConstraintsForCell(r, c, parent, cols); constraints.setX(x); constraints.setWidth(width); } x = Spring.sum(x, Spring.sum(width, Spring.constant(xPad))); } // Align all cells in each row and make them the same height. Spring y = Spring.constant(initialY); for (int r = 0; r < rows; r++) { Spring height = Spring.constant(0); for (int c = 0; c < cols; c++) { height = Spring.max(height, getConstraintsForCell(r, c, parent, cols).getHeight()); } for (int c = 0; c < cols; c++) { SpringLayout.Constraints constraints = getConstraintsForCell(r, c, parent, cols); constraints.setY(y); constraints.setHeight(height); } y = Spring.sum(y, Spring.sum(height, Spring.constant(yPad))); } // Set the parent's size. SpringLayout.Constraints pCons = layout.getConstraints(parent); pCons.setConstraint(SpringLayout.SOUTH, y); pCons.setConstraint(SpringLayout.EAST, x); } }