I'm wondering, how can I make a menu system (not JMenuBar) with swing components (like in games, where a new 'screen' comes in)? Maybe switching between panels? How?
I've heard about card layout but i'm not sure it's for me, and I don't really understand how should I implement it.
Example (sorry for ugly drawing): http://i57.tinypic.com/14mckkk.png
Based on the screenshot you've provided, you should look into using Swing Dialogs. Dialogs are little pop up windows that can be activated upon button presses, and that can contain as many or as few components as you like.
So your grey JFrame in the image would have three buttons; the action on clicking one would be to open a dialog populated with "Content A". The "Button X" in that dialog could either be a vanilla "Close" button that the dialog API will provide for you for free, or it could be some other button of your design.
If I'm not mistaken, what you are asking is for something like this:
In this case you can split the frame with using a layout of your choice that can fit to the size you want (personally I'd opt for a BoxLayout). Then you can go on with adding the buttons to the side panel and add that to the box panel so you end up with something like this:
Now add a JPanel and you'll have your content section. You'll have to make sure you add Listeners to the buttons so that the content that is displayed is updated. It'll look something like this:
button.addActionListener(
new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
if(content) {
content.removeAll();
}
populateContent();
content.validate();
}
});
I could be way off because of the little amount of information at hand, this is just my interpretation of the question. I would have commented but I don't have the rep so I'm sorry in advance if this is completely off!
Related
Im using NetBeans to do a work for school. There i have an huge JPanel that contains a huge JFrame. That JFrame as 5 small JFrames, 1 is the menu with buttons, the other ones are boxes with text that will swap when i choose in the buttons.
When one box is showing the other ones are invisible im using the following code (dont know if it is the best):
public ConversorUI() {
initComponents();
PanelVazio.setVisible(true);
PanelTemp.setVisible(false);
PanelComp.setVisible(false);
PanelMoedas.setVisible(false);
this.pack();
}
My problem is, when i run my program i have a big space with nothing and only below it the components appear. I want them to appear in the top of my window. What can I do ?
ANSWER
After some time searching i just realized i could Set Layout from JPanel to Card Layout and create JPanels over each other activating them with the code:
private void DinheiroButtonActionPerformed(java.awt.event.ActionEvent evt) {
//Remove Panels
CAIXA.removeAll();
CAIXA.repaint();
CAIXA.revalidate();
//Add Panels
CAIXA.add(DinheiroBox);
CAIXA.repaint();
CAIXA.revalidate();
}
Looks like you are using Java Swing , right ?
Any way you do something wrong if you have JPanel that contains JFrames. To build correct UI you have to add JPanels inside JFrame.
Also, to reach correct component order and placing you need configure corresponded layout, here is description.
You can load one jframe at e time
Because every jframe you added have own place and visibility doesnt do anything to remove
Try to save every jframe and for changing
Delete old one and add new one
Why are you using multiple JFrames to do this? From what I can see it would be a better idea to use JPanels that can take care of the individual tasks, such as the menu and buttons etc.
I'm relatively new to using javax.swing myself, but from my knowledge you can only have 1 frame at a time per window (like the other person said).
From what i've been able to discern from your project, you possibly don't even need multiple panels. You just need one panel for the menu with buttons, and multiple Labels or JLabels that display text according to the button. You can use the setText method in writing your addActionListener, something like this:
buttonName.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
labelName.setText("blah blah blah");
//and whatever else you may need to do
}
});
updating a panel
I am designing a program for my assignment using java.
I have made a log on box where user enters name and password and clicks on submit or register. Once clicked, an optionpane is brought
upEX.(JOptionPane.showMessageDialog(null, "Account registered", "Account",
JOptionPane.INFORMATION_MESSAGE);)
I was wondering how can I add an action listener to the OK button in the option pane that would remove all contents (username,pass,2btns) and replaces it with something else? I found this link: updating a panel which basically just says to use frame.remove and then add.
Another question:
My java file looks something like this
class MainFrame extends JFrame {
public MainFrame() {
// All the log in panels buttons are here, etc
}
}
I was wondering if it would be efficient to add the new box details in the same area or make a new class?
I was wondering how can I add an actionlistener to the OK button in the option pane that would remove all contents (username,pass,2btns) and replaces it with something else? I found this link: updating a panel which basically just says to use frame.remove and then add.
Don't. Allow the dialog to close, ascertain the action the user took, show another dialog...
Better yet, create you own JPanel, use a CardLayout, add all your views to it and navigate between them. Place this on an instance of a JFrame...
See How to Use CardLayout for more details
I was wondering if it would be efficent to add the new box details in the same area or make a new class?
It would depend. A Class should be a self contained unit of work, focused on accomplishing it's designed task...if your main class is doing more work then it should, then yes, separate the logic into separate class
I have searched for this problem and haven't found anything close. I will try to be specific and post code however this is a large program so I can't post all the code. The problem in general is this: A JButton on one panel causes components on another panel to shift at first click. This only occurs when there is an action listener added to the button. (clicking the button without an action listener doe noting (obviously)). The problem is that the action listener i add only changes the button background, text, and size (to fit new text).
Here is the action listener as of right now. login is the JButton:
private class LoginListener implements ActionListener{
public void actionPerformed(ActionEvent e){
loggedIn = !loggedIn;
if(loggedIn){
login.setText("Logout");
login.setBackground(Constants.RED);
}
else{
login.setText("Login");
login.setBackground(Constants.UPPER_BOUNDARY);
}
login.setSize(login.getPreferredSize());
}
}
The setup is this. The action listener is a subclass of the loginPanel where the login button is located. That loginPanel is added to the main JFrame at the upper 1/4 of the frame. The lower 3/4 of the main JFrame is mainPanel which has other swing components. The loginPanel and mainPanel do not share components or variables or really know of each other's existence (as far as I have coded). Yet when this actionlistener above is added to the login button components in the mainPanel shift from their positions to other positions. The only happens at first click and then they stay where they are at (not where i want them).
Other factors:
- I use absolute positioning (sorry if you don't like it but I like it better)
- I am using a SynthLookAndFeel but have never had this issue with this look and feel before.
Thanks
Other factors: - I use absolute positioning (sorry if you don't like it but I like it better)
There's nothing to be sorry about, and the solution is simple: Don't use absolute positioning, but instead learn about and use the layout managers to there full abilities. One of the reasons to use them is to avoid pernicious bugs like this one. It's quite possible that your code is in fact using a component's default layout manager even now without you knowing about it. You can find out more about them here. One of the keys to using them well is to nest them by using nested JPanels, each using its own layout manager. Then they can do the heavy layout lifting for you automatically.
The title is a bit confusing, but I will be using Java and Jframe. Basically, I want to be able to click anywhere on the form and have a "text area/box" show up (maybe use a JTextField or JTextArea ?). I want the user to be able to edit, delete and move this string around as well.
I am thinking I need an actionlistener to listen for clicks on the form. Each click will call for a new text"box" to be created. I am not sure how to make this "box" editable, deleteable, or moveable by the user though.
I need a way to store the string and co-ordinate data too. Would it be a good idea to simply extend the JTextField or JTextArea to add co-ordinate information to them? I see that swing is event based, so I need some kind of trigger to "save" the text (was thinking the enter key, but I realize I'd like the user to be able to enter multi-line strings).
Any thoughts would be appreciated. I am familiar with Java but only have a bit of experience with the UI portion.
Instead of an ActionListener you will need a MouseListener to track clicks.
Sounds like you need an undecorated JInternalFrame with a text box in it on JDesktopPane. However, I don't think you can create an undecorated JInternalFrame, maybe start with a normal JInternalFrame with a TextBox in it and create new frames on mouse clicks on the Desktop Pane. Then see if you can make the JInternalFrame more like a Window.
Another route is a custom component that does everything you need. This is possible, just a lot more custom code.
I am trying to remove the drag bar across the top of the JFrame. I would like to keep the minimize maximize and close options that appear on this bar available. What I was thinking was to remove the bar (and icons). Then add the icons as embedded images, that implement the JFrame actionlistener. It would also be necessary for this to work with JInternalFrames. Any help would be greatly appreciated.
You need to step back and understand how Swing works.
When you create a JFrame, Swing uses the OS widget for the frame. The title bar that you see is part of the OS component and you have no direct control over it with Swing. You can hide the titlebar (and border) of the frame by using setUndecorated(false) as suggested earlier. In this case you loose all the functionality associated with the title bar (dragging and access to all the buttons) and the Border (resizing). So if you need any of this functionality you need to recreate it all yourself.
On the other hand you can use:
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame();
and Swing will build a title bar and Border for you and add back all the default functionality. So if you want to prevent dragging you would now need to inspect the JFrame for all its components to find the component that represent the title bar. When you find this component you can then remove the MouseMotionListeners from the component to prevent dragging. This way the title bar will still be there and the buttons will be active, but the dragging will be disabled. I would guess that is easier the adding in all the functionality to an undecorated frame.
As you have already realized a JInternalFrame is a component completely written in Swing so you have access to the child components, which is essentially the approach I'm suggesting for the JFrame as well.
To remove the titlebar, use
setUndecorated(true);
You could then re-add buttons for maximize/minimize. The source for maximize-button could look something like that (just to get an idea). Use JFrame.ICONIFIED for minimize button.
JButton btnMaximize = new JButton("+");
btnMaximize.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
if(MainFrame.this.getExtendedState() == JFrame.MAXIMIZED_BOTH) {
MainFrame.this.setExtendedState(JFrame.NORMAL);
}
else {
MainFrame.this.setExtendedState(JFrame.MAXIMIZED_BOTH);
}
}
});
Take a look at this article - i think it is pretty much what you need for the JFrame part.
http://www.stupidjavatricks.com/?p=4
It is based on JDialog, but it should be pretty much the same as JFrame. Maximize/minimize should be pretty much the same as the close button.
For JInternalFrames...
javax.swing.plaf.InternalFrameUI ifu= this.getUI();
((javax.swing.plaf.basic.BasicInternalFrameUI)ifu).setNorthPane(null);