I'm trying to reference the contents of a tabbed pane and NOT the tab itself. Every article i find on the matter only affects the tab and not the tab contents... im a bit lost. any help?
You shouldn't be manually putting anything in the content pane. The only access you should have to the content pane is by putting in sub panels in various index positions, using
JTabbedPane.add(String title, Component component)
Obviously the sub component itself can be it's own JPanel, and you can add whatever you like to that panel.
Related
I'm trying to add an applet to one of my tabs, but each time I try to add it to a certain tab, it's creating a new tab.
I have already made the tabbed pane using netbeans, added panels to both of the tabs and tried to replace the panel with my applet panel and it's not working correctly. My questions is how can I refer to the "Game" tab and add the applet to that panel?
https://dl.dropbox.com/s/q0lfuz9cxp757n8/Screenshot%202014-07-13%2001.06.42.png
Here's what I'm trying
TabbedPane tabbedPane = new TabbedPane();
tabbedPane.gameTab.add(gamePanel);
And it keeps creating a new tab as seen in the image, but I'm trying to add the gamePanel to the existing "Game" tab.
First of all you don't want to keep creating a new JTabbedPane. You want to update the existing tabbed pane.
Read the JTabbedPane API. There are several approaches you could use:
1) Use the remove(...) method to remove the current tab, then use the add(...) method to add a new tab. The API allows you to add a tab to the end or at a specific index. This is probably the easiest.
2) Use the getComponentAt(...) method to get the panel that was added to a specific table. Then you can add any component to this panel, assuming you have a proper layout.
In both cases the question is why isn't the applet added when you initially create the tab?
I have a JFrame that has 3 components on it.
The design is like this:
My problem happens in the JTabbedPane.
The pane begins off with a settings panel, which is added to it when the whole JFrame loads up. Then, when the user connects, a new tab is added to the pane (the actual chat panel).
When that tab is added to the pane, it overlaps the bottom of the java applet loaded from the local file, which is NOT what I want to do. Here is how it looks:
As you can tell, the bottom of the highscores and java applet has been cut off. How do I resize the JTabbedPane to make it resize towards the bottom, instead of upwards?
Call pack() after adding a tab to the pane.
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
Anyone explain to me the difference between content pane and layout with by example. Give code example where exactly need of content pane (or) layout.
What is the difference between these, and in what circumstances should you use one rather than the others?
There is no comparison between content pane and layout; they are two distinct entities.
Content Pane :
The default content pane is a simple intermediate container that inherits from JComponent, and that uses a BorderLayout as its layout manager.
Layout
It is used to place components on the parent container. These are basically the set of constraints, which establish the position of a given component on the parent container.
They both are used as you make a Swing Application. As when you write
frame.add(childComponent);
the childComponent is actually added to the content pane. Three methods, add(...), remove(...) and setLayout(...), are overridden for content pane.
I found three ways to fill my JFrame frame = new JFrame("...")
createContentPanel returns a JPanel and createToolBar returns a ToolBar.
frame.add(this.createToolBar(), BorderLayout.PAGE_START); //this works and puts the ToolBar above and the ContentPanel under it<br>
frame.add(this.createContentPanel(), BorderLayout.CENTER);
frame.setContentPane(this.createContentPanel()); //this lets the JToolBar hover over the ContentPanel
frame.getContentPane().add(this.createToolBar());
frame.getContentPane().add(this.createContentPanel()); //this only puts the last one into the JFrame
frame.getContentPane().add(this.createToolBar());
And now I am wondering why should i use the getContentPane()/setContentPane() method if i could just use a simple frame.add(...) to fill my frame.
You are right that it doesn't matter which you use (JFrame#add(...) vs. JFrame#getContentPane().add(...)) since they both essentially call the same code, however there will be times in the future when you'll need access to the contentPane itself, such as if you want to change its border, set its background color or determine its dimensions, and so you'll likely use getContentPane() at some point, and thus getting to know it and be familiar with it would be helpful.
//this only puts the last one into the JFrame
You need to understand how layout managers work. The default content pane is a JPanel that uses a BorderLayout. When you add a component and don't specify a constraint, then it defaults to the CENTER. However you can only has a single component in the center so the layout manager only knows about the last one added. When the layout manager is invoked it sets the size() and location() of that component. The other component has a size of 0, so it is never painted.
In Java 1.6, you can just use the add method of JFrame:
http://download.oracle.com/javase/6/docs/api/javax/swing/JFrame.html
(It will be delegated to the contentPane.)
http://download.oracle.com/javase/1.4.2/docs/api/javax/swing/JFrame.html
Which says:
The JFrame class is slightly
incompatible with Frame. Like all
other JFC/Swing top-level containers,
a JFrame contains a JRootPane as its
only child. The content pane provided
by the root pane should, as a rule,
contain all the non-menu components
displayed by the JFrame. This is
different from the AWT Frame case. For
example, to add a child to an AWT
frame you'd write:
frame.add(child);
However using JFrame you need to add the child
to the JFrame's content pane instead:
frame.getContentPane().add(child);
The same is true for setting layout
managers, removing components, listing
children, and so on. All these methods
should normally be sent to the content
pane instead of the JFrame itself. The
content pane will always be non-null.
Attempting to set it to null will
cause the JFrame to throw an
exception. The default content pane
will have a BorderLayout manager set
on it.