Very strange occurrence, am in need of a quick way to make my panel components (labels and textboxes) visible again on the form in NetBeans. As soon as I added the Table to the right of the panel, the panel seems to have disappeared. Strangely enough, the components continue to be available in the left side, in the Navigator box, so they are not completely gone, just seem to be hidden. I was unable to find any Visible property, that I could to set to true. Any help is much appreciated. Also, what exactly triggered this behaviour, is this a bug? Many thanks in advance.
Its a focus issue, it makes things easier when you have lots of components.
At the moment you have the scrollPane selected/focused, so you will only be able to see that and any child components.
If you want to see sister or parent components you need to set your focus to your jFrame (or whatever component you want to see).
You can do this from the box on the bottom left, just double click on jFrame, its the top item and also parent to both the scrollPane you have selected now and also parent of your jPanel that contains all the other buttons and labels.
This will have been caused when you double clicked the scrollPane.
Related
I have written a Swing UI that has a JPanel with numerous controls and on the right hand side a few columns of JCheckBoxes. This is all handled by making the JPanel use a GridLayout. The problem I am having is that a given checkbox toggles it's selection status no matter where in it's grid "cell" you click in. Note, I am not using a JTable approach. The "cell" is just the rectangular area of the screen the GridLayout gave to the checkbox. It can be much bigger than the checkbox. I can't figure out how to make sure the checkboxes are only selectable when you click in the tiny box of the drawn control (not the big box of the "cell" that the checkbox is basically centered in). I've googled a lot and everyone talks about JTables. Again, I am not using a JTable. This issue is causing headaches for my users as they click on the application window and accidentally select an option!
The GridLayout forces all UI components to fill their cell completely, so the actual checkbox only gives the illusion that it's smaller than the cell it occupies. The solution here, as with many other more complex UI designs, is to use multiple layouts nested inside one another.
In your case, try putting all your check boxes inside a BoxLayout and using glue to space them as needed. This BoxLayout should be placed side by side with your GridLayout in another enclosing container (either a JPanel or your ContentPane -- I can't say for sure because you only gave a brief description of your UI with no code or illustration).
Play around with the idea of nesting layouts until you get something you like, and don't forget to try resizing your window to see what the layout manager does under the circumstances. The final appearance isn't always exactly what you imagine it will be.
Good evening everyone;
I java swing i am trying to have a menu like in the picture
(in the picture left side)
However, it appears that it is more difficult than i thought.I had border layout and i put box layout in the middle and jscroll bar for the right side. Inside the box layout i but labels with icons and i try to chance visibility with adjustment level event. However, i could not manage to obtain any results. I made a research on the internet and stackoverflow however, again i could not exactly reach my purpose.
Regards ...
JScrollBars are not typically used alone, they are used in conjunction with JScrollPane.
Basically, you want to add you components to a container of some kind (say a JPanel) with an appropriate layout manager, then set that container as the view within a JScrollPane
See How to Use Scroll Panes for more details
i found an answer inspiring from comments of other users. First of all thank you for having a look to my question.
i used the codes in here;
http://www.java2s.com/Code/Java/Swing-JFC/AsimpleJScrollPanedemonstration.htm
problem is i required to create a container and put the items to container and then take that pane to put jscroolpane.
Regards ...
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
The code pretty huge and involves a lot of different class/methods:
But here is the gist:
There is a main frame : A_Main
Selecting something in the main frame A: opens a JDialog B_Dialog
This B_Dialog has a JPanel on it: C_Panel
This C_Panel comprises of a textfield and a button
On clicking on the textfield/button: opens a tooltip and another JPanel: D_Panel
Now, the problem is:
1) The tooltip overflows the size of B_Dialog and therefore gets truncated
2) D_Panel however; even if its outside the boundary of B_Dialog gets displayed fully
2.1) There are some texfields and drop down menus in this D_Panel
2.2) The mouse events function correctly in this D_Panel items (drop down menus)
2.3) But Keyboard events do not function correct (Textfield)
I would be glad if you could help!
Thanks!
This can only be done in newer versions of the JDK.
See, Mixing Heavyweight and Lightweight Components.
Now, when I try to enter something in the JAR JPanel's text field, I am not able to do so as this pops out of the border of the main JDialog that contains it.
Add a JScrollPane around the JPanel, and allow it to expand both horizontally and vertically. If this doesn't work, you may need a customized Layout Manager, or use one of the default ones like GridBagLayout.
Also, you'll need to gain focus before you can enter text, but that doesn't seem to be the problem here.
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.