How to add a listener for frame change
hello
Im quite new to jmf, and im writing a code which uses the webcam, but im stuck at a point where i want a listener which is called whenever the frame changes in the visualcomponent. so basically im looking for a frame changed listener to be added to the visual component instead of using a loop or a timer or something.
i just need a method to be called constantly along the stream coming from the webcam but which is consistent with the changing of the frames.
i would really appreciate any kind of help.
thank you
i thought there would be a listener or something ready to do thisThere is. It's the Rendered interface, which has a callback everytime data is received. If you want to create a custom renderer that is triggered everytime data is available, you set a processor to use your renderer and when data is available, your process command will be called. Same as an event listener...but it's very advanced stuff to implement the renderer interface.
for example if u want to record a video ull need to capture every frame as soon as it comesNo, the video doesn't come to you a frame at a time. The video is already encoded somehow when you get it, so it's coming in as a stream just like it'll be going out to the file... It's a stream of bytes, not a stream of images... You're not digitizing here, you're transcoding.
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How to add mouse listener for a single row alone
I have a requirement. In a JTable when I double click a particular row the cells in the row should set to the width which I have provided.
The problem with my code is when I click fourth row in the table, the first row gets adjusted.
So how I need help is
only if I click the first row, the first row cell size should get adjusted not when I click fourth row.
Similarly if I give some cell width and height for fourth row cells, then when I double click the fourth row, the fourth should alone get adjusted and not the other rows.
Hope I have explained clearly.
How can it be achieved?
Please find below my code. Everything is hardcoded. So it may look messy. Please excuse.
// Imports
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
class SimpleTableExample extends JFrame {
// Instance attributes used in this example
private JPanel topPanel;
private JTable table;
private JScrollPane scrollPane;
String data1 = "";
String data2 = "123456789ABCDEFGHIJKLMNOPQRSTUVQWXYZabcdefghijklmnopqrstuvwxyzaquickbrownfoxjumpedoverthelazydog";
int size = data2.length();
// Constructor of main frame
public SimpleTableExample() {
// Set the frame characteristics
setTitle("Simple Table Application");
setSize(400, 200);
setBackground(Color.gray);
// Create a panel to hold all other components
topPanel = new JPanel();
topPanel.setLayout(new BorderLayout());
getContentPane().add(topPanel);
// Create columns names
String columnNames[] = { "SEL", "DESIGN DATA", "PART NUMBER" };
// Create some data
String dataValues[][] = { { data1, data2, "67", "77" },
{ "", "43", "853" }, { "", "89.2", "109" },
{ "", "9033", "3092" } };
DefaultTableModel model = new DefaultTableModel(dataValues, columnNames);
model.addColumn("PART TITLE");
model.addColumn("SPECIAL INSTRUCTIONS");
table = new JTable(model) {
public boolean isCellEditable(int rowIndex, int colIndex) {
return false;
// set specific row height
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
int colInd = 0;
TableColumn col = table.getColumnModel().getColumn(colInd);
int width = 50;
col.setPreferredWidth(width);
int colInd2 = 1;
TableColumn col2 = table.getColumnModel().getColumn(colInd2);
int width2 = 100;
col2.setPreferredWidth(width2);
int colInd3 = 2;
TableColumn col3 = table.getColumnModel().getColumn(colInd3);
int width3 = 10;
col3.setPreferredWidth(width3);
int colInd4 = 3;
TableColumn col4 = table.getColumnModel().getColumn(colInd4);
int width4 = 10;
col4.setPreferredWidth(width4);
int colInd5 = 4;
TableColumn col5 = table.getColumnModel().getColumn(colInd5);
int width5 = 10;
col5.setPreferredWidth(width5);
table.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
JTable target = (JTable) e.getSource();
int row = target.getSelectedRow();
int column = target.getSelectedColumn();
TableColumn col1 = table.getColumnModel().getColumn(0);
col1.setPreferredWidth(50);
TableColumn col2 = table.getColumnModel().getColumn(1);
col2.setPreferredWidth(400);
table.getColumnModel().getColumn(1).setCellRenderer(
new TableCellLongTextRenderer());
table.setRowHeight(50);
TableColumn col5 = table.getColumnModel().getColumn(4);
col5.setPreferredWidth(200);
// Create a new table instance
// table = new JTable(dataValues, columnNames);
// Add the table to a scrolling pane
scrollPane = new JScrollPane(table);
topPanel.add(scrollPane, BorderLayout.CENTER);
// Main entry point for this example
public static void main(String args[]) {
// Create an instance of the test application
SimpleTableExample mainFrame = new SimpleTableExample();
mainFrame.setVisible(true);
class TableCellLongTextRenderer extends JTextArea implements TableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
this.setText((String) value);
this.setWrapStyleWord(true);
this.setLineWrap(true);
// set the JTextArea to the width of the table column
setSize(table.getColumnModel().getColumn(column).getWidth(),
getPreferredSize().height);
if (table.getRowHeight(row) != getPreferredSize().height) {
// set the height of the table row to the calculated height of the
// JTextArea
table.setRowHeight(row, getPreferredSize().height);
return this;
Edited by: 915175 on Aug 3, 2012 4:24 AMHi
Try below code. Hope this will help
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
public class SimpleTableExample extends JFrame {
private JPanel topPanel;
private JTable table;
private JScrollPane scrollPane;
String data1 = "";
String data2 = "123456789ABCDEFGHIJKLMNOPQRSTUVQWXYZabcdefghijklmnopqrstuvwxyzaquickbrownfoxjumpedoverthelazydog";
int size = data2.length();
// Constructor of main frame
public SimpleTableExample() {
// Set the frame characteristics
setTitle("Simple Table Application");
setSize(400, 200);
setBackground(Color.gray);
// Create a panel to hold all other components
topPanel = new JPanel();
topPanel.setLayout(new BorderLayout());
getContentPane().add(topPanel);
// Create columns names
String columnNames[] = { "SEL", "DESIGN DATA", "PART NUMBER" };
// Create some data
String dataValues[][] = { { data1, data2, "67", "77" },
{ "", "43", "853" }, { "", "89.2", "109" },
{ "", "9033", "3092" } };
DefaultTableModel model = new DefaultTableModel(dataValues, columnNames);
model.addColumn("PART TITLE");
model.addColumn("SPECIAL INSTRUCTIONS");
table = new JTable(model) {
public boolean isCellEditable(int rowIndex, int colIndex) {
return false;
// set specific row height
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
int colInd = 0;
TableColumn col = table.getColumnModel().getColumn(colInd);
int width = 50;
col.setPreferredWidth(width);
int colInd2 = 1;
TableColumn col2 = table.getColumnModel().getColumn(colInd2);
int width2 = 100;
col2.setPreferredWidth(width2);
int colInd3 = 2;
TableColumn col3 = table.getColumnModel().getColumn(colInd3);
int width3 = 10;
col3.setPreferredWidth(width3);
int colInd4 = 3;
TableColumn col4 = table.getColumnModel().getColumn(colInd4);
int width4 = 10;
col4.setPreferredWidth(width4);
int colInd5 = 4;
TableColumn col5 = table.getColumnModel().getColumn(colInd5);
int width5 = 10;
col5.setPreferredWidth(width5);
// Cell Render should apply on each column -- add by Rupali
for(int i=0; i< table.getColumnModel().getColumnCount(); i++){
table.getColumnModel().getColumn(i).setCellRenderer( new TableCellLongTextRenderer());
table.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
JTable target = (JTable) e.getSource();
int row = target.getSelectedRow();
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setTableCellHeight(table,row,column); //Added by Rupali
TableColumn col1 = table.getColumnModel().getColumn(0);
col1.setPreferredWidth(50);
TableColumn col2 = table.getColumnModel().getColumn(1);
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TableColumn col5 = table.getColumnModel().getColumn(4);
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// Create a new table instance
// table = new JTable(dataValues, columnNames);
// Add the table to a scrolling pane
scrollPane = new JScrollPane(table);
topPanel.add(scrollPane, BorderLayout.CENTER);
* Created By Rupali
* This will set cell's height and column's width
* @param table
* @param row
* @param column
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// set the JTextArea to the width of the table column
setSize(table.getColumnModel().getColumn(column).getWidth(),
getPreferredSize().height);
if (table.getRowHeight(row) != getPreferredSize().height) {
// set the height of the table row to the calculated height of the
// JTextArea
table.setRowHeight(row, getPreferredSize().height);
// Main entry point for this example
public static void main(String args[]) {
// Create an instance of the test application
SimpleTableExample mainFrame = new SimpleTableExample();
mainFrame.setVisible(true);
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public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
this.setText((String) value);
this.setWrapStyleWord(true);
this.setLineWrap(true);
return this;
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Revision: 12481
Revision: 12481
Author: [email protected]
Date: 2009-12-03 18:48:17 -0800 (Thu, 03 Dec 2009)
Log Message:
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QE notes: -
Doc notes: -
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Reviewer: Kevin
Tests run: checkintests
Is noteworthy for integration: No
Ticket Links:
http://bugs.adobe.com/jira/browse/SDK-24528
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Message was edited by:
bharat kumar
Message was edited by:
bharat kumarHi
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