i've got a question about JTextField background color. How can I change it in enabled text field (while editing) ? setBackground works only for disabled text field. UIManager.put can change this background for all of my text field in window but i want to do that only for one of them.
There's a number of ways you might achieve this, but the basic idea is, when the field gets focus, you want to set the fields background color to something else and when it loses focus, you want to reset it...
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class FocusedField {
public static void main(String[] args) {
new FocusedField();
}
public FocusedField() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JTextField field1 = new JTextField(20);
JTextField field2 = new JTextField(20);
FocusListener highlighter = new FocusListener() {
#Override
public void focusGained(FocusEvent e) {
e.getComponent().setBackground(Color.GREEN);
}
#Override
public void focusLost(FocusEvent e) {
e.getComponent().setBackground(UIManager.getColor("TextField.background"));
}
};
field1.addFocusListener(highlighter);
field2.addFocusListener(highlighter);
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(4, 4, 4, 4);
gbc.gridwidth = gbc.REMAINDER;
frame.add(field1, gbc);
frame.add(field2, gbc);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
I would be tempted to write a simple singleton "manager" which allowed you to register and unregister fields as you needed.
You might also be able to achieve something similar by attaching a PropertyChangeListener to the KeyboardFocusManager, this would allow you to basic apply this highlighting concept to all fields within in any program without the need to change any of the code, but that would depend on your requirements
Just add an ActionListener on your textField, and then set the Background in the Listener.
Ok, there is what i needed:
Properties props = new Properties(); props.put("showFocusFrame", "off");
((AbstractLookAndFeel)UIManager.getLookAndFeel()).getTheme().setProperties(props);
I think it works with textField.setForeground(Color.RED) :)
Related
I have a java application that uses Swing graphics which has a 2D array of textfields, each of which are updating their text properly throughout the application. On each iteration of change, I change the text of the textfield then I make it's background green for half a second and turn it back to white. The issue is that, after the first iteration of the change, the textfields no longer flash green. When I comment out the portion that converts the background back to white, the rest works and the cells progressively turn green one by one (correctly), which indicates that it is working and executing properly. I tried to address this by repainting and revalidating the UI but it's not working. What is going on?
Below is my code that updates the UI.
try {
textfieldArray[row][col].repaint();
textfieldArray[row][col].revalidate();
textfieldArray[row][col].setBackground(Color.green);
textfieldArray[row][col].repaint();
textfieldArray[row][col].revalidate();
Thread.sleep(300);
textfieldArray[row][col].setBackground(Color.white);
textfieldArray[row][col].repaint();
textfieldArray[row][col].revalidate();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Swing is a single threaded framework, it also NOT thread safe. This means two things.
First, you should never perform any long running or blocking operations within the context of the Event Dispatching Thread and...
Secondly, you should never update/modify the UI, or anything the UI depends on, from outside the context of the Event Dispatching Thread.
This means, your Thread.sleep is blocking the EDT, preventing from process paint requests.
Instead, you need some way you can trigger an update to occur after a specified delay. If that doesn't scream Swing Timer, I don't know what does
I would highly recommend taking the time to read through Concurrency in Swing for the background of why your code isn't working and possibly How to Use Swing Timers for a solution
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private JTextField field;
public TestPane() {
setLayout(new GridBagLayout());
field = new JTextField("All your bases beloging to us", 20);
JButton blink = new JButton("Blink");
Timer timer = new Timer(500, new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
field.setForeground(null);
field.setBackground(null);
}
});
timer.setRepeats(false);
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
add(field, gbc);
blink.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
field.setForeground(Color.WHITE);
field.setBackground(Color.GREEN);
timer.start();
}
});
add(blink, gbc);
}
}
}
I have a customized JButton in a Java Swing application.
it changes it appearances according to mouse event.
MouseEvent.MOUSE_ENTERED - will trigger the hover image for the button. MouseEvent.MOUSE_PRESSED - will trigger the pressed image.
MouseEvent.MOUSE_RELEASED - will change the foreground to gray and render the button disabled.
This is working fine with actual mouse clicks.
I want to add a support for pressing the ENTER key.
simply calling button.doClick() did not go through the hover-press-release cycle, but simply jumped to the release event.
So I have this short and effective code for doing this.
InputMap im = workspacePnl.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
ActionMap am = workspacePnl.getActionMap();
im.put(KeyStroke.getKeyStroke("ENTER"), "connect");
am.put("connect", new ConectAction());
private class ConectAction extends AbstractAction {
#Override
public void actionPerformed(ActionEvent ev) {
simulateClick();
}
and the problematic code:
public void simulateClick() {
MouseEvent evt;
evt = new MouseEvent(connectBtn,
MouseEvent.MOUSE_ENTERED, 1, 0, 0, 0, 1, false);
connectBtn.dispatchEvent((AWTEvent) evt);
//CommonUtil.sleep(300);
evt = new MouseEvent(connectBtn,
MouseEvent.MOUSE_PRESSED, 8, 0, 0, 0, 1, false);
connectBtn.dispatchEvent((AWTEvent) evt);
//CommonUtil.sleep(300);
evt = new MouseEvent(connectBtn,
MouseEvent.MOUSE_RELEASED, 20, 0, 0, 0, 1, false);
connectBtn.dispatchEvent((AWTEvent) evt);
}
I am trying to make the ENTER press go through the same route: trigger a MOUSE_ENTERED event which will alter the button's appearance for hover, followed by MOUSE_PRESSED and MOUSE_RELEASED.
But I only see the last event effect. it is as if i'm only firing the last event alone which lacks the liveliness for an interactive software.
I tried (as can be seen commented out) to have the thread go to sleep after each event firing, but it has no effect.
If I try to fire each of the other two events they are noticeable on the screen by themselves. it's the batching together that messes things up.
How can I fire a series of dispatchEvents one by one which will all be noticed by the user? how can i make the program wait for the current dispatchEvent to work it's magic before striding on to the next on?
Any help or insights would be greatly appreciated.
How can I fire a series of dispatchEvents one by one which will all be
noticed by the user? how can i make the program wait for the current
dispatchEvent to work it's magic before striding on to the next on?
Mouse and Key Event are correctly implemented in ButtonComponents, don't use MouseListener, to use events from ButtonModel, by using ChangeListener, for example
MouseEvent.MOUSE_ENTERED - will trigger the hover image for the button.
Make use of the roll over support supplied by the button, see JButton#setRolloverEnabled & JButton#setRolloverIcon
MouseEvent.MOUSE_PRESSED - will trigger the pressed image.
Is a little more difficult, but you can use listener to the ButtonModel for changes and update the icon based on you requirements
MouseEvent.MOUSE_RELEASED - will change the foreground to gray and render the button disabled.
Should probably be achieved through the use a ActionListener
I am trying to make the ENTER press go through the same route:
JButton#doClick will go through the isArmed and isPressed states of the model automatically, which will trigger the state changes provided by the previous comments...
With the mouse...
With the keyboard...
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.ImageIcon;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new GridBagLayout());
JButton btn = new JButton();
try {
btn.setIcon(new ImageIcon(ImageIO.read(getClass().getResource("/Trash01.png"))));
btn.setRolloverIcon(new ImageIcon(ImageIO.read(getClass().getResource("/Trash02.png"))));
btn.setRolloverEnabled(true);
// btn.setSelectedIcon(new ImageIcon(ImageIO.read(getClass().getResource("/Trash03.png"))));
} catch (IOException ex) {
Logger.getLogger(Test.class.getName()).log(Level.SEVERE, null, ex);
}
btn.getModel().addChangeListener(new ChangeListener() {
#Override
public void stateChanged(ChangeEvent e) {
if (btn.getModel().isPressed()) {
try {
btn.setIcon(new ImageIcon(ImageIO.read(getClass().getResource("/Trash03.png"))));
} catch (IOException ex) {
ex.printStackTrace();
}
} else {
try {
btn.setIcon(new ImageIcon(ImageIO.read(getClass().getResource("/Trash01.png"))));
} catch (IOException ex) {
ex.printStackTrace();
}
}
System.out.println("Armed: " + btn.getModel().isArmed());
System.out.println("Enabled: " + btn.getModel().isEnabled());
System.out.println("Pressed: " + btn.getModel().isPressed());
System.out.println("Rollover: " + btn.getModel().isRollover());
System.out.println("Selected: " + btn.getModel().isSelected());
}
});
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
add(btn, gbc);
add(new JTextField("Stealer of focus"), gbc);
btn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
btn.setEnabled(false);
}
});
InputMap im = getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
ActionMap am = getActionMap();
im.put(KeyStroke.getKeyStroke("ENTER"), "connect");
am.put("connect", new AbstractAction() {
#Override
public void actionPerformed(ActionEvent ev) {
System.out.println("click");
btn.doClick();
}
});
}
}
}
It's batching together because your whole code is running on the EventDispatchingThread (EDT).
When you call simulateClick() from actionPerformed() call it on a new thread instead of the same thread (which will be EDT).
I'm trying to display a few Unicode characters inside of a jLabel. Take for example, the "degrees Fahrenheit" character (℉ or "\u2109"). This character is only being displayed when I use the default font-size, which happens to be 11. When I change the font-size, the character is replaced with an empty square. I've tried several different sizes and several different fonts that supposedly support a wide range of unicode characters. Can anyone tell me why Swing only displays this unicode character under a specific font-size?
Proof:
All the code related to the UI is auto-generated by NetBeans using the designer, but here is how I'm supplying the text to the jLabel:
private void btnConvertActionPerformed(java.awt.event.ActionEvent evt) {
if(optToFarenheit.isSelected())
{
int tempFahr = (int)((Double.parseDouble(txtInput.getText()))
* 1.8 + 32);
lblResult.setText(tempFahr + " ℉");
//lblResult.setText(tempFahr + " \u2109"); <-- Tried this too
}
}
Instead of "changing" the font, which might lead you to a font that is incompatible, try simply changing the label's "default" font's size
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestUnicodeFont {
public static void main(String[] args) {
new TestUnicodeFont();
}
public TestUnicodeFont() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
JLabel normal = new JLabel("Normal - ?");
JLabel byCode = new JLabel("Normal code - \u2109");
JLabel normalLarger = new JLabel("Large - ?");
normalLarger.setFont(normalLarger.getFont().deriveFont(48f));
JLabel byCodeLatger = new JLabel("Large code - \u2109");
byCodeLatger.setFont(byCodeLatger.getFont().deriveFont(48f));
add(normal, gbc);
add(byCode, gbc);
add(normalLarger, gbc);
add(byCodeLatger, gbc);
}
}
}
When changing the font in Netbeans for you component, there is a checkbox in the font dialog "Derive the font from the default font", make sure it is selected and it should work.
Or you have to make sure the new font does support unicode characters. For example, "Arial Unicode MS" should work as well (it is mentioned on your wiki page)/
I solved a similar problem, using symbols in the text of a label in the NetBeans editor, by first produce the text with symbols in Word and simply copy that in the text field of the label.
I want to show JLabel but want to hide JFrame border and other lower level containers like JPanel.
It just JLabel displayed on the screen.
I tried window transparency but following piece of code hides everything if trying to work with window opacity.
On decreasing windowOpacity , even JLabel becomes blurred. I tried with JPanel as well but couldn't get exact output.
I want this behaviour in jdk1.6 only
I want the JLabel content to be visible properly without any opacity impact but backbround must be purely transparent.
public class TEST {
public static void main(String[] args) {
JFrame frame = new JFrame("Sanjaal Corps - Windows On Top Demo!");
frame.setSize(400, 100);
frame.setLocation(100, 150);
com.sun.awt.AWTUtilities.setWindowOpacity(frame,0.4f);
frame.setUndecorated(true);
frame.add(new JLabel("TESTING"));
frame.setAlwaysOnTop(true);
frame.setVisible(true);
}
}
I tried with solution provided
http://www.dreamincode.net/forums/topic/140041-make-a-jpanel-transparent-to-see-the-desktop-behind/
But the problem here is if we minimize or maximize the window , then a constant color being set, So found its not the best solution or may say the Perfect one.
Assuming I understand your requirements correctly...
I typically add a transparent panel to the Window. This means that, generally, the transparency properties of the Window don't then effect the child components, for example...
Generally speaking, there are now two ways to make a window transparent.
Under Java 7, you simply make it's background color transparent.
Under Java 6 (update 10+), you need to use the unofficial com.sun.AWTUtilities class
...
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Window;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.lang.reflect.Method;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.LineBorder;
public class TransparentWindow02 {
public static void main(String[] args) {
new TransparentWindow02();
}
public TransparentWindow02() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setUndecorated(true);
setOpaque(frame, false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setOpaque(false);
setLayout(new BorderLayout());
setBorder(new LineBorder(Color.RED));
JLabel label = new JLabel("Click me if you can see me");
label.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent e) {
SwingUtilities.windowForComponent(TestPane.this).dispose();
}
});
add(label);
}
}
public static void setOpaque(Window window, boolean opaque) {
String version = System.getProperty("java.runtime.version");
if (version.startsWith("1.7")) {
window.setBackground(new Color(0, 0, 0, 0));
} else {
try {
Class<?> awtUtilsClass = Class.forName("com.sun.awt.AWTUtilities");
if (awtUtilsClass != null) {
Method method = awtUtilsClass.getMethod("setWindowOpaque", Window.class, boolean.class);
method.invoke(null, window, opaque);
}
} catch (Exception exp) {
exp.printStackTrace();
}
}
}
}
Assuming you want to show the foreground, of the label (nothing else) that is its text/icon, you would set the frame's opacity to false:
com.sun.awt.AWTUtilities.setWindowOpaque(frame, false);
The usual caveat against using com.sun.** classes, which unfortunately is the only way to reach transparent windows prior to java7
I've added an image that I want to use as a background image and I want to put jLabels on top of it. So I use the image icon feature and show the image, but when I try to put a jLabel on it, it gets moved off to the side. I've tried several tutorials and it appears to work on youtube, but when I try to do the same thing on my own they get moved out of position.
field.setIcon(new javax.swing.ImageIcon(getClass().getResource("/wiffleball/resources/field2.png"))); // NOI18N
The JLabel doesn't have a layout manager by default. Label's also have default text positioning, which is normally aligned to the left, you need to change all these default values...
You may want to use a different layout manager other the BorderLayout, but this is just an example...
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class SimpleLabel {
public static void main(String[] args) {
new SimpleLabel();
}
public SimpleLabel() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JLabel label = new JLabel(new ImageIcon("C:\\hold\\thumbnails\\_cg_836___Tilting_Windmills___by_Serena_Clearwater.png"));
label.setHorizontalAlignment(JLabel.CENTER);
label.setVerticalAlignment(JLabel.CENTER);
label.setLayout(new BorderLayout());
JLabel child = new JLabel("Can you see me?");
child.setForeground(Color.WHITE);
child.setFont(label.getFont().deriveFont(Font.BOLD, 24f));
child.setHorizontalAlignment(JLabel.CENTER);
child.setVerticalAlignment(JLabel.CENTER);
child.setHorizontalTextPosition(JLabel.CENTER);
child.setVerticalTextPosition(JLabel.CENTER);
label.add(child);
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(label);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
I put everything on a jPanel and that seemed to do it. It just took some tinkering with. Thanks!