I have a panel with a BoxLayout declared as follows:
venueInfoPanel.setLayout(new BoxLayout(venueInfoPanel, BoxLayout.Y_AXIS));
When I add two JTextArea to this panel, they all align to the left, which is what I want. However, when I add a JLabel, it aligns itself to the center, instead of to the left. Why is this? How can I make it so it aligns with all the other JTextArea? I read the document here and found out that I use Component.LEFT_ALIGNMENT and I did that by doing
label.setAlignmentX(label.LEFT_ALIGNMENT);
where label is the JLabel I wanted to add to the JPanel
All components need the alignmentX set to left. The tutorial you referenced has plenty of working examples. You should be able to figure it out on your own. If you still have a problem post your SSCCE demonstrating the problem.
Related
I have a JPanel that uses a horizontal Box layout and contains a JLabel that I would like to keep in the exact same position as other components within the JPanel are setVisible(false). Currently, the JLabel moves to the left as other components become invisible.
What's the easiest way to go about this?
EDIT: Pics added
So this is what the JPanel look like with all components visible
When I set the three JTextFields on the right to invisible, the JLabel set to text X moves to the left like this:
But I would like it to stay where it was like this:
EDIT2: I'm actually using Netbeans GUI editor's Free Design for this particular JLabel. I'm sorry for the mistake - I've been using a lot of BoxLayouts recently and I got confused!
Currently, the JLabel moves to the left as other components become invisible.
Yes, layout managers are designed to only work with visible components. I'm not sure if any of the default layout manager will work, but I would look into using the GridBagLayout, since this layout is based on a grid structure so as long as you have components in that grid on another row the label should not shift.
Otherwise, you could dislay the "other components" in a panel using a CardLayout. Then instead of making the components invisible, you swap the panel with an empty panel.
Read the section from the Swing tutorial on How to Use CardLayout for more information and working examples.
Edit:
Based on your picture the easiest solution is to use "glue":
panel.add(Box.createHorizontalGlue);
panel.add(xLabel);
Now the label will always be displayed at the far right of the panel. Read the tutorial on How to Use BoxLayout for more information about "glue".
I have a JPanel with many components on it. He is a part of the main frame. I used GridBagLayout on him for placing components and it all works great.
In one part of that JPanel I placed JScrillingPane with another JPanel (p2). I need to place JTable (extended one by my own) and JButton on p2 one beyond second one. I used several Layouts on p2 but my extended JTable ALWAYS gets too much wide. It must not pass JScrollPane (or p2 border, whatever). When I put only JButton on p2, all works fine, but with table, all goes really bad.
So, the order of components is: JPanel with GridBagLayout, JScrollPane, JPanel with any layout, JButton and JTable at last level.
What I need to look for or whatever? I didnt post the code because it is very long and will take too much space on this page.
P.S. I know there are similar questions, but I really didnt find anything helpfull for me.I searched for hours already.
I am new on using Swings
my requirement is to align components within the jpanel(panel2)
I have taken 2 JPanels (panel1, panel2) and added to the jframe
panel1.add(panel2);
panel2.setLayout(new flowLayout());
panel2.setBounds(80,120,100,100);
getContentPane() .add(Panel1);
and I have created a "Create" button that will generate text area dynamically in panel2
now my problem is if the created textarea is reaching out of panel2 it has to show an error
message "You reached the boundaries of the jpanel so the textarea cant be created "
Thanks in advance
Set the layout before you add any elements to the panel. No not call setBounds as with layout manager present it likely has no effect at all.
I cannot explain how to layout your elements as from your question seems not possible to figure out that do you want to do. Best, post the drawing with elements as they should look like. GridLayout maybe would be good if you want to align multiple elements as in the table.
I am not good with GUIs or User Interfaces in Java.
Would a Border or JPanel be good for something like the image below?
So, what would be the best option for me? Thank you.
Read the section from the Swing tutorial on Using Layout Managers. You can easily nest panels to get the desired effect.
Maybe start with a BorderLayout. Then you can add a panel that uses a GridLayout, which contains all your image tiles, to the CENTER of the BorderLayout. Then you can add the scrollpane containing the text area to the SOUTH. Then you can create another panel to add to the EAST.
Be creative and experiment.
You can make 4 seperate panels for a border, using BorderLayout.NORTH,BorderLayout.EAST,BorderLayout.SOUTH,and BorderLayout.WEST, This is the easiest way in my opinion.
By the way, in the top right of your picture, where you wanted the information panel, you should put an information LABEL (JLabel) instead, because they hold text. JLabel topRight = new JLabel(); then set the text, position, etc.
p.s. to erase the borders around every tile (if you want to do so), use setBorderPainted(false).
Is it possible to add a JLabel on top of another JLabel? Thanks.
The short answer is yes, as a JLabel is a Container, so it can accept a Component (a JLabel is a subclass of Component) to add into the JLabel by using the add method:
JLabel outsideLabel = new JLabel("Hello");
JLabel insideLabel = new JLabel("World");
outsideLabel.add(insideLabel);
In the above code, the insideLabel is added to the outsideLabel.
However, visually, a label with the text "Hello" shows up, so one cannot really see the label that is contained within the label.
So, the question comes down what one really wants to accomplish by adding a label on top of another label.
Edit:
From the comments:
well, what i wanted to do was first,
read a certain fraction from a file,
then display that fraction in a
jlabel. what i thought of was to
divide the fraction into 3 parts, then
use a label for each of the three.
then second, i want to be able to drag
the fraction, so i thought i could use
another jlabel, and place the 3'mini
jlabels' over the big jlabel. i don't
know if this will work though..:|
It sounds like one should look into how to use layout managers in Java.
A good place to start would be Using Layout Managers and A Visual Guide to Layout Managers, both from The Java Tutorials.
It sounds like a GridLayout could be one option to accomplish the task.
JPanel p = new JPanel(new GridLayout(0, 1));
p.add(new JLabel("One"));
p.add(new JLabel("Two"));
p.add(new JLabel("Three"));
In the above example, the JPanel is made to use a GridLayout as the layout manager, and is told to make a row of JLabels.
The answer to your original question is yes for the reasons given that any Component can be added to a Container.
The reason you don't see the second label is because by default a JLabel uses a null layout manager and the size of the second label is (0, 0) so there is nothing to paint. So all you need to do is set the bounds of the second label and away you go.
You can't use a layout manager if you want to drag components around because as soon as you resize the frame etc, the layout manager will be invoked and the components will be repositioned based on the layout manager of the component.
it's a matter of layout.
you can do that using null layout (with hard coded locations) or with a custom layout.
you can use a JLayeredPane and set it's border to No Border.
you can add put them above each others by using the horizontal or vertical gap (hgap,vgap) the attributes of the layout
JPanel p = new JPanel(new GridLayout(2, 1,-40,0));
//the 40 is the hgap , make it the same with the label height .