I am trying to access a panel from my Main JForm which I use as a dynamic panel that repaints different Panel Forms.
this is the hierarchy of the forms.
Package_Main-Main_Form(JForm)-Dynamic_Panel(Panel)-DashBoard(Panel_Form)
Package_Panels-Panel_A-Panel_B
What I did was Display JForm first and repaint its JPanel with DashBoard.
now heres the problem.
I have a button inside my dashboard and when I tried to import Package_Panels.PanelA, but it doesn't work properly.
heres the first code I tried:
This code was added inside DashBoard Button.
PanelA x = new PanelA ();
this.removeAll();
this.add(x);
this.revalidate();
this.repaint();
x.setVisible(true);
I had doubts about this one since I knew if i use this.function, it points out the DashBoard Panel.
anyone knows a way to access the JForm's panel?
UPDATE: I found a way around this by using this.getParent() but other ideas are welcome. I don't to be stuck doing this over and over again.
heres what I did:
Panel_A x = new Panel_A();
this.setVisible(false);
this.getParent().add(x);
this.getParent().revalidate();
this.getParent().repaint();
x.setVisible(true);
//this.getParent().remove(this); - Does this really work? I dont want to keep this instance open.
I'm currently working on a Java Program using JFrames. I'm supposed to create a URLFrame in which I can input a web address and ask the program to fetch it and display it in the Frame. So far I am stuck and would like input on if I'm on the right track and where to go from here:
import javax.swing.*;
public class URLFrame extends JFrame {
private JPanel panel;
private JLabel messagelLabel;
private JTextField enterAddress;
private JButton fetchButton;
private JTextArea displayPage;
private JButton displayScriptCount;
private JButton writePage;
private JTextArea checkStatus;
public URLFrame(){
setTitle("Enter Address");
setSize(WINDOW_WIDTH, WINDOW HEIGHT);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
buildPanel();
add(panel);
setVisible(true);
}
}
Sounds like you are looking for something along these lines
Pure Java HTML viewer/renderer for use in a Scrollable pane
or
http://www.teamdev.com/jxbrowser
Due to the vagueness of the question, that is what I can think up. Both sources have adequate guidance on setups directly or indirectly.
EDIT: To use a textfield as an 'address-bar', use this:
String url = jTextField_For_Url_Input.getText();
java.net.URL url_to_connect_to = new java.net.URL(url);
//... whatever needed for implementation
http://www.tutorialspoint.com/java/java_url_processing.htm give a good tutorial to help you learn and you can combine this with the suggestions of the HTML related components to view a rendered copy of HTML content.
Another resource using the JEditorPane is here
Read the section from the Swing tutorial on How to Integrate With the Desktop Class.
You can use the examples there to load a URL into the default browser.
The Swing JEditorPane will display basic HTML. Look at the table of contents from the above link and you will find a section on Text Component Features that might help.
I am looking to figure out how to set the text of a label on an external Application Window.
What I have:
I have two windows so far. The first one is the main application window that will appear when the user starts the program. The second window is another separate window that I have created specifically to display a custom error window.
The problem: I seem to be unable to call the label that I have created on the error window and set the text to something custom. Why? I want to be able to reuse this window many times! This window is aimed for things like error handling when there is invalid input or if the application cannot read/save to a file.
I was going to post screen shots but you need 10 rep for that. It would have explained everything better.
Here is the code for the label on the Error_dialog window:
Label Error_label = new Label(container, SWT.NONE);
Error_label.setBounds(10, 10, 348, 13);
Error_label.setText("Label I actively want to change!");
Here is the condition I would like to fire off when it is met:
if(AvailableSpaces == 10){
//Set the label text HERE and then open the window!
showError.open();
}
I have included this at the top of the class as well:
Error_dialog showError = new Error_dialog();
Just save the label as a field in your dialog class and add a 'setter' method. Something like:
public class ErrorDialog extends Dialog
{
private Label errorLabel;
... other code
public void setText(String text)
{
if (errorLabel != null && !errorLabel.isDisposed()) {
errorLabel.setText(text);
}
}
You will need to use your dialog like this:
ErrorDialog dialog = new ErrorDialog(shell);
dialog.create(); // Creates the controls
dialog.setText("Error message");
dialog.open();
Note: you should stick to the rules for Java variable names - they always start with lower case.
Further learn to use Layouts. Using setBounds will cause problems if the user is using different fonts.
import javax.swing.*;
public class SlideShow {
JFrame slide = new JFrame("Slide Show");
public SlideShow(){
slide.setSize(300,400);
slide.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
slide.setVisible(true);
slide.setLocationRelativeTo(null);
JPanel panel = new JPanel();
JLabel label = new JLabel(new ImageIcon("Images/picture1"));
panel.add(label);
slide.add(panel);
}
public static void main(String[] args){
SlideShow slide = new SlideShow();
}
}
I have to create a simple Java GUI that displays some cards. First, I just wanted to test it by displaying one card. For some reason I can't seem to figure out why nothing is being displayed.
You haven't actually used a proper file name "Images/picture1". Should be something like "Images/picture1.png" with the file format
Also image files, generally should be read from the class path, if you plan on having them embedded to the program. To do so, you will first need to put the file in the class path. With most IDE build configurations it's as simple as placing the image in the src. So
ProjectRoot
src
images
picture1.png
Then you would read it like
new ImageIcon(getClass().getResource("/images/picture1.png"));
A better approach would be to use ImageIO.read(). If the file path is incorrect, it will throw an exception, so you know where you're going wrong
Image image = ImageIO.read(getClass().getResource("/images/picture1.png"));
ImageIcon icon = new ImageIcon(image);
You will need to put it in the try/catch block
Also do what codeNinja said about the setVisible() after adding component. Also preferably pack() the frame, instead of setSize()
You need to set the Frame visible after you add all necessary components to it. Move slide.setVisible(true); Down to the bottom of the constructor like this:
...
slide.add(panel);
slide.setVisible(true);
Alternatively you can add slide.revalidate(); at the bottom of your constructor.
I am making a Mac application, and I want my menu bar to look right.
Any Mac user knows the menu bar should be in the top screen menu. Setting apple.laf.useScreenMenuBar to true in the property list file gets rid of the in-frame menu bars and moves the menu bar of the current focused window to the screen menu.
However, when all windows are hidden or when there are no windows, there are no menu bars to move to the top, and you just get a blank menu. I heard a solution to this was to create an offscreen window that is focused when no others are. The only purpose of it would be its menu, so that it could fill in when the others are gone.
However, I've been getting loads of problems. I can't seem to move the window off the screen because Macs won't let you set the coordinates to something past the size of the screen; it just cuts it off and positions it at the edge instead. Is there something else I have to do to make an offscreen window?
You should definitely consider WizardOfOdds' very helpful answer. Using "The Application Menu" correctly will help, and it's easy to set up a minimal Info.plist to get started. A persistent File menu will allow your application to open a new window when others are closed. This answer links to a simple example.
Although Apple's Human Interface Guidelines are an excellent guide to what your users will expect, you can certainly experiment with the approach you suggested in your question. In particular, you might try setLocation(Short.MIN_VALUE, Short.MIN_VALUE) on the invisible window. In addition, you might want to respond to a WindowEvent in some special way if it signals the close of the last visible window.
Addendum: When your listener sees the last visible window close, create a new, empty application window. Alternatively, move the invisible window onscreen and make it visible until the user decides how to proceed.
Addendum: Mac OS X helpfully prevents a visible window form being moved offscreen, but it's easy to put an invisible window in limbo, as shown below.
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
public class FrameTest extends JFrame {
private static FrameTest marco;
private static FrameTest polo;
private static class MyPanel extends JPanel {
public MyPanel() {
super(true);
final JToggleButton b = new JToggleButton("Test");
b.addItemListener(new ItemListener() {
#Override
public void itemStateChanged(ItemEvent e) {
if (b.isSelected()) {
polo.setLocation(100, 100);
polo.setVisible(true);
}
else {
polo.setVisible(false);
polo.setLocation(Short.MIN_VALUE, Short.MIN_VALUE);
}
}
});
this.add(b);
}
}
public FrameTest(String title) {
super(title);
this.setLayout(new BorderLayout());
this.add(new MyPanel());
this.pack();
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(final String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
marco = new FrameTest("Marco");
marco.setLocationRelativeTo(null);
marco.setVisible(true);
polo = new FrameTest("Polo");
polo.setLocation(Short.MIN_VALUE, Short.MIN_VALUE);
}
});
}
}
I know that this post is quite old, anyway, I had the same problem and found the solution. Actually it's quite simple. Just don't add the JMenuBar to your main frame when running on mac os x, but to your application using
com.apple.eawt.Application.getApplication().setDefaultMenuBar(menuBar);
Now the MenuBar is still displayed even if you set all frame's visibility to false.
Not a direct solution, but I think some create a 1-pixel window instead. That yields complaints though, like one described at Super User: Chaotic behavior of a dead pixel on my iMac 24"...
First a note: your question seems really to be "How to have a Window menu following the Apple Human Interface Guidelines" and not "creating an offscreen frame in Java", which seems like a monstrous hack.
I suggest checking Apple's "Mac OS X Integration for Java", which, under "Window menu", shows apparently exactly what you're trying to achieve:
Apple Human Interface Guidelines suggests that all Mac OS X applications should provide a Window menu to keep track of all currently open windows. A Window menu should contain a list of windows, with a checkmark next to the active window.
This is a comment to trashgod's answer. It's too big so I have to move it here >.<
More problems!
I'm getting 2 errors:
line 23: The method itemStateChanged(ItemEvent) of type new ItemListener(){} must override a superclass method
line 50:The method run() of type new Runnable(){} must override a superclass method
Any help? I've never encountered this before. I don't know what it means.
EDIT: I have more problems! I need the offscreen window to be visible while it is offscreen for it to produce a menu to move to the screen menu bar. When I use the code
offScreen = new JFrame("WTF?! You can see me?");
offScreen.setSize(400,300);
offScreen.setLocation(0, java.awt.Toolkit.getDefaultToolkit().getScreenSize().height+50);
System.out.println(offScreen.getLocation());
offScreen.setVisible(true);
System.out.println(offScreen.getLocation());
I get the output:
java.awt.Point[x=0,y=1100]
java.awt.Point[x=0,y=961]
It moves it back once it's made visible again!
I've searched for ages and I can't find anything.
This code works in Java 7:
if( isMac ) {
//This creates an invisible frame so that we always have a menu bar visible
JFrame menuFrame = new JFrame();
menuFrame.setUndecorated( true );
menuFrame.setJMenuBar( defaultMenuBar );
AWTUtilities.setWindowOpaque( menuFrame, false );
menuFrame.setBounds( 0,0,1,1 );
menuFrame.setVisible( true );
}
Just call this before you open any other windows, and it will stay in the background and automatically become the focused window when others are closed. You can still use the com.apple.eawt.Application.getApplication().setDefaultMenuBar(menuBar) method in your application so that you don't need to call setJMenuBar() on each JFrame.