I have made a simple GUI using a GridLayout(5,3) , it is action performed and it implements action listener as well. The are some calculation and algorithms that working according to what inputs or buttons the user provides. Everything works just fine up to this point.
At some point in my code, the user gets a pop up massage that he is correctly logged in to the system using this common method JOptionPane.showMessageDialog(....) . All i want is, after he press the OK button, is to create an additional form that pop ups, and looks similar to the one above i made with GridLayout(5,3) so that my user can store additional info about him.
I really cant get it to work, and i have no idea how to start this.
Any ideas are very welcomed! Cheers and thanks in advance :)
if add this:
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container pane = getContentPane();
GridLayout grid=new GridLayout(10,1);
pane.setLayout(grid);
it only adds more lines to my gridlayout. And all above buttons and labels remains. How can i get rid of the previous labels and buttons?
You state:
if add this:
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container pane = getContentPane();
GridLayout grid=new GridLayout(10,1);
pane.setLayout(grid);
it only adds more lines to my gridlayout. And all above buttons and labels remains. How can i get rid of the previous labels and buttons?
You have at least three options if you want to swap "views" on the JFrame.
If you want to use the same GUI with the same JTextComponents but have the components empty of text, then you'll need to go through your text components and call setText("") on all of them. If you want to keep the same JButtons and labels but change their text, then similarly you will need to go through all of them calling setText("something else").
If you want totally new components to replace the old ones, the most straight forward way I believe is to use a CardLayout to hold your JPanel that has all your components. When you want to swap the JPanel for another, make sure that the new JPanel has been added to the CardLayout-using JPanel and then call next() on the CardLayout object.
Another way is to manually swap out JPanels held by the JFrame's contentPane by calling removeAll() on the contentPane, then add(nextJPanel) on it, then revalidate(), then repaint().
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
}
});
I want to design a jFrame where there are three jButtons and a set of three jpanels one above the other. When we call a jPanel from the respective jButton , that pane will be displayed. It would appear to the user as if the same portion of the jFrame is displaying the content to be shown on clicking each jButton.But when i am trying to set the jPanels one above the other, they are being shown side by side thus elongating the jFrame horizontally. What should i do to put one jPanel over the other? Any other idea than jPanel which should do the work i intend to do would also be help !!
Your behavior sounds like you are using a FlowLayout. This will not "layer" anything. Instead us a CardLayout, which does exactly what you are trying to accomplish. You call method like show, next, and previous to navigate the panels. See How to Use CardLayout for more details.
Also there are probably hundreds of other examples here on so. Go through the cardlayout questions.
[Tip: navigate the different tabs like "votes" and "frequent" to filter to some of the better posts]
Here's one that uses the show() method to switch between two panels by name.
I'm new to Java and actually designing the GUI for an application.
My main is a JFrame with 5 buttons and 1 panel which will have the "content", for the first button for example, I've designed a Jframe which has a JTabbedPane.
Now I would like to know how can I incorporate the content from that frame to the "content" panel when clicking on the button ?
I tried to use .add but I get:
java.lang.IllegalArgumentException: adding a window to a container
(seems we can't add Jframe to Jpanel).
I also tried the setVisible way but it doesn't meet what I need since it will hide the panel completely and I will get a tiny window with the buttons.
![Jframe content][1]
![Main Jframe with buttons and Jpanel to show the jframe content][2]
The code is generated by netbeans, and I forgot to mention that I did research on adding a Jframe into another Jframe but here isn't my problem at all.
I tried by changing the Jframe by JInternalFrame but clicking on button doesn't do anything.
Button has
contentPanel.add(new GestionUtilisateur());
So basically when you click on the "Gestion Utilisateur" button for example, you get that JTabbedPane that has to appear in the content area (which is blank here)
You should not be putting JFrames inside JPanels. If you have multiple panels you would like to display, depending on something like a button, look in to LAYOUTS.
In particular, it sounds like a CardLayout would work well for your needs. CardLayouts allow you to swap which panel is displayed in a frame by bringing it to the "front" of a list of panels. This would let you display your JTabbedPane on one button click, then click another to change the content pane.
JFrame can not be added in a JPanel.
use JInternalFrame
Make and hold references to JPanels containing your content. A JFrame is really just that, it's a frame (though you can add a single component to it).
You can't add a JFrame to a JPanel. If you want multiple components to be visible use layouts such as BorderLayout, GridBag, etc. Check out some of the Swing layout tutorials here.
Content should be designed as JPanel (you can design it with drag&drop just like JFrame) but if you really have to put a JFrame to JPanel for some reason, you can do it by
myJPanel.add(myJFrame.getContentPane());
however i would suggest modification of your program.
Think about the classic installation process, where you have a "next" button and when you click it the content of the window changes. To represent this situation I thought of two possible solutions:
-when "next" is clicked destroy the current JFrame and create a new JFrame, maybe passing to his constructor useful information (e.g. actual window size, content inserted by the user in the current frame, ...)
-when "next" is clicked remove all the components from the current JFrame and add new components as needed
The first solution looks way better about OOprogramming, because I can keep separate classes for different frames and I can avoid huge methods that empty the frame and repopulate it. However the first solution sounds a bit "dirty" and I should pass lots of parameters to the new frame. To represent this situation I would choose the second solution.
Now think about a menu with an "option" component: in this situation I would create a new JFrame when "option" is clicked, so that I can populate it with option items. Is this a correct solution? Is there a way I can always know which one is the best solution? Are there any solutions I didn't think about?
Destroying the main JFrame would be silly -- not to mention jarring for the user. Just use a single JFrame and change its contents.
To implement an installer wizard, use a single JFrame containing one large JPanel on top and a smaller one containing the "Next", "Back", "Cancel" buttons along the bottom. When the Next or Back buttons are pressed, you replace the large JPanel. You can have many different JPanel subclasses, one for each "page" of the wizard.
There's a LayoutManager called CardLayout which is ideal for implementing this scenario -- it manages a "stack" of components, and only shows one of those components at a time. Use a BorderLayout in the JFrame. Into the center position put a JPanel with a CardLayout. Then add the individual pages of the wizard to that JPanel, so the CardLayout can manage them.
The CardLayout is well suited for this. You just swapout the JPanel contents when the "Next" button is pressed.
I have Java application which adds JTextFields # runtime to JPanel. Basically user clicks a button and new JTextField is added, clicks again added again...
Each new JTextField is directly below the previous one. Obviously I run out of space pretty soon so I'm trying to use JScrollPane and thats where the hell begins, because it just doesnt work no matter what I try.
Right click on JPanel and Enclose in Scroll Pane. Didnt work.
After reading some examples I realized I must have JPanel as an argument for JScrollPane constructor. Which I did via right clicking on ScrollPane and CustomizeCode. Because apparently auto-generated code is protected in NetBeans and I cannot just change all those declarations, etc. manually. Still doesnt work.
I did try to set PreferedSize to null for JPanel and/or JScrollPane, didnt help.
JScrollPane is a child of lets call it TabJPanel (which in turn is a tab of TabbedPane). I tried to mess with their relationships, basically trying every possible way of parentship between JFrame, JPanel(holding textfields), TabJPanel and JScrollPane, but nothing worked.
I also made VerticalScrollBar "always visible" just in a case. So I see the scrollbar, it's just that populating that JPanel with JTextFields does not affect it.
When there are too many JTextFields I they go "below" the bottom border of JPanel and I cannot see them anymore.
Code for adding new JTextFields is like this, in a case it's relevant.
JTextField newField = new JTextField( columns );
Rectangle coordinates = previousTextField.getBounds();
newField.setBounds(coordinates.x , coordinates.y + 50, coordinates.width, coordinates.height);
JPanel.add(newField);
JPanel.revalidate();
JPanel.repaint();
Sorry for a long post I'm just trying to provide as much info as possible, because being newbie I dont know whats exactly relevant and whats not. Thanks in advance :)
As there is another answer now, I'm adding my suggestion too.
This sounds exactly like a problem to use a JTable with a single column. JList is not yet editable (and might never be).
JTable would handle the layout problems for you, and you can easily access the values via the table.
Use your own TableModel (a simple Vector should be sufficient in your case), and add values to it.
An option you have is to utilize a LayoutManager, instead of setting the bounds directly on the components. To test this, a simple single column GridLayout with the alignment set to vertical should prove the concept.
panel.setLayout(new GridLayout(0,1));
zero in the rows param allows for rows to be added to the layout as needed.
I do this way to add a scrollpane, create a panel and fill it with few components, then create a scrollpane in the component you want to add it, cut and paste the panel in which all your details will fall in and resize the scrollpane.Because the components take a larger space than the one visible right click on the scrollpane and select design this container, there you can increase the size of the scrollpane and add as many components as you have.