Thank you for viewing. I'm a beginner with Java swing. I'm trying to merge two tabs in an application. The tabs are created in this way:
pane=new JTabbedPane(JTabbedPane.TOP, JTabbedPane.WRAP_TAB_LAYOUT);
pane.add(panel1);
pane.add(panel2);
I'd like to have the contents of panel1 and panel2 merged together, with panel2 displayed underneath panel1. I know this may seem like a very simple question, but I am still learning. Thanks guys.
Edit: panel1 and panel2 are both JScrollPane
Create a third JPanel that uses whatever layout would work (BorderLayout or BoxLayout come to mind), and add your two JPanels to the third one. Then add the third one to the tabbed pane.
edit: this is a little confusing: "Edit: panel1 and panel2 are both JScrollPane" So these are in fact JScrollPanes, not JPanels? Regardless, my suggestion above still works. :)
Most important though: study how to use layout managers and components such as JPanels etc on the Oracle Swing Tutorials: Layout Manager Tutorial
JPanel containerPanel = new JPanel();
containerPanel.setLayout(new BoxLayout(containerPanel, BoxLayout.PAGE_AXIS));
containerPanel.add(panel1);
containerPanel.add(panel2);
pane.add(containerPanel);
Related
I would like to create a list of expandand/collapse panels, like on this image:
I haven't found any swing component for this, so I began to create something like this.
I tried to put buttons one under the other, which fill the available width, but doesn't really works. I can only see the last added one.
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
panel.add(new JButton("Delphi Projects"), BorderLayout.NORTH);
panel.add(new JPanel(), BorderLayout.NORTH); // hidden panel
panel.add(new JButton("Delphi Projects | Delphi Files"), BorderLayout.NORTH);
panel.add(new JPanel(), BorderLayout.NORTH); // hidden panel
panel.add(new JButton("Other Files"), BorderLayout.NORTH);
panel.add(new JPanel(), BorderLayout.NORTH); // hidden panel
panel.add(new JButton("C++ Builder Projects | C++ Builder Files"), BorderLayout.NORTH);
panel.add(new JPanel(), BorderLayout.NORTH); // hidden panel
JScrollPane scroll = new JScrollPane(panel);
You can take a look to JXTaskPaneContainer and JXTaskPane from SwingX project which have these advantages:
They are components just like a JPanel is so no extra effort is required to work with them.
Unlike accordions you can have more than one panel expanded at any
time.
They have a cool and smooth effect on collapsing/expanding events.
Unlike trees/tree tables you don't have to mess with either TreeModel nor TreeTableModel at all. Also trees and tree tables are components intended to show data in a hierarhical form, not to add components into it.
If you don't like task panes and want to implement something on your own then you have JXCollapsiblePane (also available in SwingX API).
Check SwingLabs Demos for a complete set of SwingX components demo.
Screenshot
Look at JXTreeTable from the SwingX project:
You might also look at JXTree, which is similar, and might be better, depending your exact needs.
Get it from here.
The component you're looking for is an accordion. Have a look at this question:
Accordion for Swing?
As to your code - you can only see the last one because you're adding them all to a panel with a BorderLayout, with BorderLayout.North as the layout constraint. Each one removes the previously added panel. Try switching to another layout - e.g. BoxLayout.
you have to put a grid panel in your layout panel. so in the "north" part in your layout panel, just add a grip panel of one column and the number of raw you want
I am learning to use swing so please bear with me. Have a look at the attached screenshot:
These are JLabels within a JLabel within a JFrame. I would like to move these inner JLabel (which are randomly generated in size and color at runtime) to the very bottom as though they were books on a shelf. I know about Layout managers, though I can't quite seem to find the proper one to do what I want. This screenshot shows the result of specifying none, thus it should default to FlowLayout.
The inner JLabels are just .add()ed without any placement done. SetLocation appears to do nothing whatsoever.
Can you help me out?
If I were you I'd add put those JLabels inside of a JPanel with a boxlayout then align that with a border layout. Here is some code to help you out:
JLabel outer = new JLabel();
outer.setLayout(new BorderLayout(0,0));
/** Add inner JLabels here. The other you add them is the order they will appear from to right**/
JPanel bookshelf = new JPanel();
bookshelf.setLayout(new BoxLayout(toolbar, BoxLayout.X_AXIS));
//Add your jlabels to the bookshelf
outer.add(bookshelf, BorderLayout.SOUTH);
Here is a great tutorial on layout managers.
Also here is a UI I designed which is similar to what I think you want.
Hope this helps you out.
Can i combine Java layouts in same JPanel. I'm stuck with with placing my components on JPanel. It shoudl be like this: JLabel, JButton, JButton , JLabel and new line and same. I used BorderLayout but it wont go to the next row, keep adding components to same row and I need a new row. Ideal sit combined with cardlayout or some other good solution.
EDIT: Solved with GridLayout (0,4) It will do the job till i learn to use GridBaglayout. Thank you for trying to help me.
Yes you can combine layouts.
Using a JPanel you are able to embed other JPanels:
JPanel back = new JPanel(new BorderLayout());
JPanel rows = new JPabel(new GridLayout(3,3));
back.add(rows, BorderLayout.CENTER);
Without seeing your code though it's difficult to know exactly what you are trying to achieve!
Yes you can combine java layouts.
A common pattern I use is BorderLayout first on a frame. The central component expands out, while the other components shrink in. Inside these panels I might have a Flowlayout to show buttons evenly spaced horizontally on top.
Another common approach for forms is using a Gridbaglayout, then adding all the form elements at gridX and gridY positions. I then later can stretch and teak these cells using other constraints in the Gridbaglayout repetoire.
Can you add a screenshot so that we can see what you want to do?
Here I go again... battling with swings!!! So I'm creating an online test which will be displayed in an applet. The number of questions in the tests isn't fixed, so I need to ask questions according to the test. In order to display the questions I created a question jpanel that then I added to container panel which be displayed in the applet. For the container panel I'm using a boxlayout that allows me to stack questions one on top of the other.
My issue is that after adding more than 5 questions to the container panel the questions start overlapping. So can anyone guide me?
First, how can I avoid the overlapping?
Second, does a jpanel have a fixed maximum size? Or is there a way I can make it big enough to fit all the test question in the panel container? I thought about embedding the panel in a jscrollpane or I don't know if once the container panel is embedded in the applet it will scroll down as I scroll down the browser... Thank you guys for any help
Here's a pic of what it looks like when there aren't many questions...
Here is the code...
public class Test extends JPanel {
public Test() {
setLayout(null);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(0, 5, 712, 1200);
add(scrollPane);
JPanel panel = new JPanel();
scrollPane.setViewportView(panel);
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
MultipleChoice q1 = new MultipleChoice();
panel.add(q1);
MultipleChoice q2 = new MultipleChoice();
panel.add(q2);
MultipleChoice q3 = new MultipleChoice();
panel.add(q3);
MultipleChoice q4 = new MultipleChoice();
panel.add(q4);
MultipleChoice q5 = new MultipleChoice();
panel.add(q5);
}
}
I'm guessing, and all I can do is guess without an sscce, but if your MultipleChoice JPanel uses null layout, then it won't be able to give a decent preferredSize to your layout managers allowing for overlapping components. If so, again the solution is to not use null layout, almost ever.
You state in comment:
I know buddy... But how can I be more specific when I don't know much about swings? I'm using Windowbuilder and that's the layout given when setting a container layout to absolute.
"buddy"?
regarding, "when I don't know much about swings": then learn about Swing. Go to the Layout Manager Tutorials and read up on the layout managers.
regarding, "I'm using Windowbuilder and that's the layout given when setting a container layout to absolute.": part of your problem, as you yourself admit, is that you don't yet fully understand Swing and in particular use of its layout managers, and one reason for this problem is that you're using a tool that buffers you from having to understand this. I urge you not to use WindowBuilder. Again read up on the layout managers and learn how to use them. You will not be sorry that you've done this.
I am using WindowBuilder Pro for eclipse, and I would like to have two Jpanels that perfectly overlap each other. I would then be able to toggle their visibilty based on the selection of a combox box. When I try and acheive this in the gui builder, the first panel gets displaced by the second panel. And advice please?
It is possible using groupLayout, according to the tutorial .
What you must do is add the components to a mother JPanel , and set that panel to use GroupLayout.
Then add the components to the layout as a ParallelGroup in both the horizontal and vertical spacing. This means they will occupy the same X and Y space. Then disable/enable as needed, hiding the JPanels as well.
I believe the way it would work is so:
JPanel panel1, panel2, panel3;
//initialize panel3, etc
panel1=new JPanel();
panel2 = new JPanel();
panel1.add(new JTextField("Panel1"));
panel2.add(new JTextField("PANEL2"));
groupLayout = new GroupLayout(panel3);
panel3.setLayout(groupLayout);
groupLayout.setHorizontalGroup(
groupLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(panel1)
.addComponent(panel2)
);
groupLayout.setVerticalGroup(
groupLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(panel1)
.addComponent(panel2)
);
panel1.setEnabled(false);
panel1.setVisible(false);
then add a jCheckBox with an ActionPerformed method containing:
if(panel1.isEnabled()) {
panel1.setEnabled(false);
panel1.setVisible(false);
panel2.setEnabled(true);
panel2.setVisible(true);
}else
if(panel2.isEnabled()) {
panel2.setEnabled(false);
panel2.setVisible(false);
panel1.setEnabled(true);
panel1.setVisible(true);
}
That produced the desired behaviour for me. You should be able to switch the JComboBox for the JCheckBox fairly easily.
EDIT: Removed the necessity of having "Jpanel of their own". That should not be the case, and the above method allows you to get the benefits of both GroupLayout and CardLayout.
I would like to have two Jpanels that perfectly overlap each other. I would then be able to toggle their visibilty based on the selection of a combox box
See: How to Use Card Layout for an example that does exactly this.
I would like to have two Jpanels that perfectly overlap each other.
I believe the CardLayout is there exactly for that reason.
Basically, you can nest different panels or 'Cards' using the CardLayout and set the appropriate card to be displayed programmatically (on some event).