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.
Related
I am now writing code simple GUI that's for start the game window. I only need Do you want to start game message and start button on the window. But I have a confusing concepts for the JFrame and JPanel. Actually, I thought I need to add JPanel to JFrame to add the other components such as JLabel, JButton,...etc. But I realized I don't actually need JPanel. I can just add the components simply use add(button), add(label) to JFrame. So why I need JPanel. And I think JFrame doesn't need JPanel but JPanel need JFrame. Am I understand correctly?
No, not always. A simple graphical user interface may be implemented by just adding components "directly" to a JFrame. But in order to get more flexibility, you would always use JPanels. For example, to employ different layouts in different parts of the GUI, to group certain components together, etc.
A JFrame is backed by a JRootPane, a part of which is a contentPane.
(image from Oracle Javadoc)
When you add components to a JFrame, you are really adding them to the content pane, e.g.: frame.getContentPane().add(Component).
A JFrame is a common starting scene of a Swing GUI application, while a JPanel is intended to be put in another scene (container). Since both content pane and a JPanel inherit from the same class (Container) you may use them in a similar manner, as far as adding components to them goes.
Do I need JPanel always?
No. Well, unless you need a Swing GUI. Then yes.
Another answer replied words to the effect. "No, you can add components direct to a frame" What they missed was that components added to a JFrame are added to the content pane (automatically). The content pane is a JPanel.
Having said that:
I (and many others) would recommend designing an app based around a main content panel, then adding that panel to a top-level container as needed. The top level container might be a JFrame, JWindow, JDialog, JOptionPane ..
What prompted the question? A JPanel is a very 'light weight' container (in more ways than one). A GUI can contain 1000s and not be burdened by doing so. Of course, that's a rare requirement, but just saying .. use panels as needed and don't worry about it.
I not able to getting the proper JinternalFrame. In my application in main JFrame I have one disktopPane that contains GridLayout.
When I call JInternalFrame by click on button I am getting that internalFrame, but that fix to a particular Grid box only, and I am not able to maximize the InternalFrame.
How can I solve the probleam?
below is my GUI:
I am doing Code through NetBeans.
How Can I fix this issue ?
Don't use a jdesktoppane. Use a normal JFrame with a JPanel with your components and the gridbaglayout.
For the windows floating above the main JFrame use new JFrame's with setAlwaysOnTop(true) and make sure they have your main JFrame as root.
I have an open-source java swing application like this:
http://i47.tinypic.com/dff4f7.jpg
You can see in the screenshot, there is a JPanel divided into two area, left and right area. The left area has many text links. When I click the SLA Criteria link, it will pop-up the SLA Criteria window. The pop-up window is JFrame object.
Now, I'm trying to put the pop-up window into right area of the JPanel, so that means no pop-up window anymore, i.e. when I click the SLA Criteria link, its contents will be displayed at the right area of the JPanel. The existing content of the right area of JPanel will not be used anymore. The concept is just same like in the java api documentation page: http://docs.oracle.com/javase/6/docs/api. You click the link in the left frame, you'll get the content displayed at the right frame.
The example illustration is like this:
(note: it's made and edited using image editor, this is not a real screenshot of working application)
http://i48.tinypic.com/5vrxaa.jpg
So, I would like to know is there a way to put JFrame into JPanel?
I'm thinking of using JInternalFrame, is it possible? Or is there another way?
UPDATE:
Source code:
http://pastebin.com/tiqRbWP8 (VTreePanel.java, this is the panel with left & right area divisions)
http://pastebin.com/330z3yuT (CPanel.java, this is the superclass of VTreePanel and also subclass from JPanel)
http://pastebin.com/MkNsbtjh (AWindow.java, this is the pop-up window)
http://pastebin.com/2rsppQeE (CFrame.java, this is the superclass of AWindow and also subclass from JFrame)
Instead of trying to embed the frame, you want to embed the frame's content.
There is (at least) one issue I can see with this.
The menu bar is controlled by the frame's RootPane.
Create you're self a new JPanel. Set it's layout to BorderLayout.
Get the menu bar from the frame (using JFrame#getJMenuBar) and added to the north position of you new panel.
Get the frames ContentPane and add it to the center position of the panel.
There is undoubtedly countless other, application specific issues you will run into trying to do this...
No, you don't want to "put a JFrame into a JPanel" and your illustration above doesn't demonstrate this either. Instead it's showing a subordinate window on top of (not inside of) another window. If you absolutely need to display a new subordinate window, I'd recommend that you create and display a JDialog. The tutorials will explain how to do this, or if you get stuck post your code attempt and we'll help you work with this.
Edit 1
You state:
I need to convert from the pop-up window style into the jpanel content style. It's just like the java api documentation page style: docs.oracle.com/javase/6/docs/api When you click the text in left frame, it doesn't show any pop-up, right? The content is displayed at right frame directly. So that's basicly my goal. The source code is quite big. I will try to paste the source code if possible.
What you are looking for is to simply implement a MouseListener in a JList or JTable, and when responding to the click get the content based on the selection made. This has nothing to do with placing a JFrame in a JPanel and all to do with writing the correct program logic. Again, display it in a modal JDialog -- but that's all secondary to your writing the correct non-GUI logic. You're really barking up the wrong tree here. Forget about JFrames, forget about JPanels for the moment and instead concentrate on how you're going to extract the SLA Criteria data when it is clicked on.
Edit 2
I think I see what you're trying to do -- instead of JFrames and JDialogs, use JPanels and swap them using a CardLayout which would allow you to swap views.
I had skimming the source codes, I saw that the AWindow.java has internal panel (APanel.java) to hold the window's content, and it also has a public method to return the content panel object (getAPanel()). With this, I can use it for fetching the window's contents into other container.
Finally, I decided to use JTabbedPane in the right area of VTreePanel for displaying the pop-up window's contents.
You cannot put a Jframe into a JPanel. Instead you should try to create a separate panel that has functionalities like your JFrame and embed that into your JPanel.
Since you can put a JPanel into another JPanel but not a JFrame into another JPanel
So I have created this JFrame window which has a lot of items like JLabel, JComboBox JTextField etc… At the bottom it has a "next" JButton.
I want that when a user clicks the next button, everything on the screen should be removed and replaced with stuffs from other class that I have created.
I only manage to open a new JFrame window whenever I click the next button. Can somebody please tell me how to remove all items from the screen and replace them with items from another class.
Thanks. I am a newbie so please give me the easiest way possible.
This sounds like a job for CardLayout
You could create a base panel in the BorderLayout.SOUTH position of your JFrame that would have your navigation buttons and have a number of panels added to your main panel being managed by CardLayout.
See Creating Wizard Dialogs with Java Swing
While the systematic thing for it is using CardLayout, you can imitate it if you don't want to learn how to use it!!
Create a Panel, add all items except the next button to this panel. Use BorderLayout to put the panel on top of the next button in the frame.
Now when the user press the next button you remove the panel (jframe.remove(panel)). create a new JPanel and add it using the BorderLayout again on top of the next button.
So I am working on a GUI application using the swing framework. In short, I have 3 JPanels that act as different views of my application. Now the problem is that no matter the order I add the JPanels to my JFrame, only the final JPanel I add resizes when I switch to that view.
Some relevant bits of code:
When creating the window, I first create each individual JPanel, and add it to the JFrame:
JPanel newPanel = new SomeClassExtendingJPanel();
this.jframe.add(newPanel);
Next, whenever I switch between views of the application, I hide the panel that is currently active:
jframe.validate();
jframe.repaint();
oldPanel.setVisible(false);
And then activate the to be shown panel:
jframe.validate();
jframe.repaint();
newPanel.setVisible(true);
Does anyone know what could be wrong?
To resize the JFrame with each swap, you could call pack() on it, but this is kludgy having a GUI resize all the time. A better solution is to use the mechanism that Swing has for swapping views -- a CardLayout. This will size the container to the largest dimension necessary to adequately display all of the "card" components.
Check out the CardLayout tutorial and the CardLayout API for more on this.
JFrame's ContentPane has implemented BorderLayout by Default, and there is possible to put only one JComponents to the one Area,
you have to change used LayoutManager or put another JPanels to the other Areas