I'm trying Swing programming but I can't do what I want.
I would like to place a top bar button with 2 lines of button but I just have 1 line in my case.
Here is my code:
Container contentPane = getContentPane();
contentPane.setLayout(new BorderLayout());
setMinimumSize(new Dimension(1000,500));
setMaximumSize(new Dimension(1000,500));
JPanel panelButton = new JPanel();
JPanel panelTopButton = new JPanel();
JPanel panelBottomButton = new JPanel();
panelTopButton.add(dashboard);
panelTopButton.add(journal);
panelTopButton.add(myPlans);
panelTopButton.add(myFavorites);
panelTopButton.add(shoppingCart);
panelBottomButton.add(profile);
panelBottomButton.add(notifications);
panelButton.add(panelTopButton, BorderLayout.NORTH);
panelButton.add(panelBottomButton, BorderLayout.SOUTH);
contentPane.add(panelButton,BorderLayout.NORTH);
//Display
setSize(400,120);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
I have this
And I want this
Can somebody help me?
You need one panel for each line.
Try to do this:
JPanel panelButtonsL1 = new JPanel();
JPanel panelButtonsL2 = new JPanel();
panelButtonsL1.add(dashboard);
panelButtonsL1.add(journal);
panelButtonsL1.add(myPlans);
panelButtonsL1.add(myFavorites);
panelButtonsL1.add(shoppingCart);
panelButtonsL2.add(profile);
panelButtonsL2.add(notifications);
The default layour of JPanel is FlowLayout. Bear in mind that layout is very important to work with swing component disposition.
Define the bottom panel as GridLayout.
JPanel panelButton = new JPanel(new GridLayout(2, 1)); // 2 rows x 1 column
panelButton.add(panelButtonsL1);
panelButton.add(panelButtonsL2);
Details of GridLayout you can find on API.
You can achieve that using a GridLayout: assign a GridLayout to panelButton with two rows and one column, and then add the two panels to it.
According to what you want there is a simpler alternative by continue using the default FlowLayout from the panel. It is more appropriate than using GridLayout since you wanted the last 2 buttons to move to the next row and center itself.
If you use GridLayout, the buttons at the next row are likely going to be directly below one of the buttons above. Here are 2 ways to get what you want.
Method 1. Reduce the width of the main panel holding your buttons:
Dosing so, you will have to add the main panel using BorderLayout.CENTER.
Method 2. Add the buttons to a sub-panel of smaller width and add it to the main panel. All your buttons will be added to the smaller sub-panel:
Related
I need to totally align components to the JTextArea components, I am currently using a BoxLayout and I already used the setAlignmentX and setHorizontalAlignment to LEFT but it's not working. Here I upload an image to make clearer what I mean. For example look at "+ Pla PLAMARC" it's clearly not aligned with the text area component.
By the moment this is the code:
//Declarations
private JLabel nomPla;
private JTextArea infoPla;
private JScrollPane textAreaScroll;
//Inside the constructor
nomPla = new JLabel();
infoPla = new JTextArea(2, 50);
textAreaScroll = new JScrollPane(infoPla);
this.setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
nomPla.setAlignmentX(Component.LEFT_ALIGNMENT);
nomPla.setHorizontalAlignment(nomPla.LEFT);
textAreaScroll.setAlignmentX(Component.CENTER_ALIGNMENT);
this.setBorder(new EmptyBorder(new Insets(25, 25, 25, 25)));
this.add(nomPla, BorderLayout.NORTH);
this.add(textAreaScroll, BorderLayout.NORTH); //Orientacions
I am clearly telling nomPla to be on the leftside, but this is not the same as the JTextArea.
How is this done then?
I already used the setAlignmentX and
The setAlignmentX(...) needs to be applied to all the components you add to the BoxLayout if you want all to be left aligned with respect to the BoxLayout.
Edit:
I just want the labels to be on the left side, not the JTextArea components..
Then you need to use a wrapper panel for the BoxLayout Panel.
For example:
JPanel wrapper = new JPanel( new FlowLayout(FlowLayout.CENTER) );
wrapper.add(yourBoxLayoutPanel);
frame.add(wrapper);
Now all the components in the BoxLayout will be left aligned and the BoxLayout panel will be center aligned in the wrapper panel.
Layout management is about nesting panels with different layout manager to achieve you desired effect.
I have a JPanel subclass on which I add buttons, labels, tables, etc. To show on screen it I use JFrame:
MainPanel mainPanel = new MainPanel(); //JPanel subclass
JFrame mainFrame = new JFrame();
mainFrame.setTitle("main window title");
mainFrame.getContentPane().add(mainPanel);
mainFrame.setLocation(100, 100);
mainFrame.pack();
mainFrame.setVisible(true);
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
But when I size the window, size of panel don't change. How to make size of panel to be the same as the size of window even if it was resized?
You can set a layout manager like BorderLayout and then define more specifically, where your panel should go:
MainPanel mainPanel = new MainPanel();
JFrame mainFrame = new JFrame();
mainFrame.setLayout(new BorderLayout());
mainFrame.add(mainPanel, BorderLayout.CENTER);
mainFrame.pack();
mainFrame.setVisible(true);
This puts the panel into the center area of the frame and lets it grow automatically when resizing the frame.
You need to set a layout manager for the JFrame to use - This deals with how components are positioned. A useful one is the BorderLayout manager.
Simply adding the following line of code should fix your problems:
mainFrame.setLayout(new BorderLayout());
(Do this before adding components to the JFrame)
If the BorderLayout option provided by our friends doesnot work, try adding ComponentListerner to the JFrame and implement the componentResized(event) method. When the JFrame object will be resized, this method will be called. So if you write the the code to set the size of the JPanel in this method, you will achieve the intended result.
Ya, I know this 'solution' is not good but use it as a safety net.
;)
From my experience, I used GridLayout.
thePanel.setLayout(new GridLayout(a,b,c,d));
a = row number, b = column number, c = horizontal gap, d = vertical gap.
For example, if I want to create panel with:
unlimited row (set a = 0)
1 column (set b = 1)
vertical gap= 3 (set d = 3)
The code is below:
thePanel.setLayout(new GridLayout(0,1,0,3));
This method is useful when you want to add JScrollPane to your JPanel. Size of the JPanel inside JScrollPane will automatically changes when you add some components on it, so the JScrollPane will automatically reset the scroll bar.
As other posters have said, you need to change the LayoutManager being used. I always preferred using a GridLayout so your code would become:
MainPanel mainPanel = new MainPanel();
JFrame mainFrame = new JFrame();
mainFrame.setLayout(new GridLayout());
mainFrame.pack();
mainFrame.setVisible(true);
GridLayout seems more conceptually correct to me when you want your panel to take up the entire screen.
I want my JTable at the centre of my JFrame and for this purpose i have used setbounds method but it's not doing anything and i don't want to use layout managers.I just want to know that why it's not doing anything?
Here is my code:
tabel=new JTable(data,columnNames);
tabel.setLayout(null);
tabel.setPreferredScrollableViewportSize(new Dimension(500,50));
tabel.setFillsViewportHeight(true);
JScrollPane pane=new JScrollPane(tabel);
pane.setBounds(100,700,200,200);
add(pane);
It's better to use layout managers but if you insist,that you want to move JTable in JFrame by setting layout to null,then you should try the following option:
(1)Make a JPanel in JFrame and add that table to JPanel in this way
JPanel panel=new JPanel();
panel.setBounds(20,300,700,300);
add(panel);
tabel=new JTable(data,columnNames);
tabel.setBounds(100,20,700,400);
tabel.setPreferredScrollableViewportSize(new Dimension(500,50));
tabel.setFillsViewportHeight(true);
JScrollPane pane=new JScrollPane(tabel);
panel.add(pane);
You should add everything to a JPanel, and then set the layout of the JPanel to a border layout. Add the table to the JPanel and then position it at the center. This is the easiest way to do it. Layouts may seem complicated and inconvenient at first but once you learn them, you quickly realise they are a million times easier that setting bounds and null layouts. Here is a link to learn about border layout: https://docs.oracle.com/javase/tutorial/uiswing/layout/border.html
You are adding JTable to a JFrame(Top level component).This may get you going
JPanel tablePanel = new JPanel(new GridBagLayout());
GridBagConstraints layout= new GridBagConstraints();
JTable jtable = new JTable();
jtable.setPreferredScrollableViewportSize(new Dimension(500,50));
jtable.setFillsViewportHeight(true);
layout.fill = GridBagConstraints.BOTH;
layout.weightx = 1;
layout.weighty = 1;
layout.gridx = 0;
layout.insets = new Insets(10,10,10,10);
tablePanel.add(new JScrollPane(jtable), layout)
You may want to set layout dimensions and insets according to your jtable.
I'm busy writing a button menu for a Java Swing application and I am wondering if it is possible to remove the padding between JButtons that are added to a JPanel.
The JPanel uses a FlowLayout that is aligned left.
JPanel panelMenu = new JPanel(new FlowLayout(FlowLayout.LEFT));
The buttons are standard JButtons
JButton buttOne = new JButton("One");
JButton buttTwo = new JButton("Two");
I added the JButtons to the panel as normal
add(panelMenu, BorderLayout.NORTH);
panelMenu.add(buttOne);
panelMenu.add(buttTwo);
Everything works as expected but what do I need to do to remove the default spacing between the buttons?
I found a suggested solution online which is the following
buttOne.setBorder(null);
buttOne.setBorderPainted(false);
buttOne.setMargin(new Insets(0,0,0,0));
buttTwo.setBorder(null);
buttTwo.setBorderPainted(false);
buttTwo.setMargin(new Insets(0,0,0,0));
However this seems to remove the spacing inside of the button and not the spacing between each button.
Is this spacing produced by the FlowLayout? If so, how can I remove it?
// 0, 0 equates to horizontal and vertical offsets, the default is 5.
JPanel panelMenu = new JPanel(new FlowLayout(FlowLayout.LEFT, 0, 0));
Should sort it!
The FlowLayout controls the spacing, the default is 5.
Use new FlowLayout(FlowLayout.LEFT, 0) to remove the spacing.
This is my code:
frame2 = new JFrame("Confirmation");
frame2.setLayout(new BorderLayout());
JRadioButton y,n,c;
panel = new JPanel();
ButtonGroup buttonGroup = new ButtonGroup();
y = new JRadioButton("Add");
buttonGroup.add(y);
panel.add(y);
n = new JRadioButton("Update");
buttonGroup.add(n);
panel.add(n);
c = new JRadioButton("Delete");
buttonGroup.add(c);
panel.add(c);
y.setSelected(true);
b1=new JButton();
b1.setBounds(300,100,2,2);
b1.setIcon(new ImageIcon(searchresult.class.getResource("/images/yes.png")));
b2=new JButton();
b2.setBounds(100,10,2,2);
b2.setIcon(new ImageIcon(searchresult.class.getResource("/images/no.png")));
panel.add(b1);
panel.add(b2);
frame2.add(panel);
frame2.setSize(182,150);
frame2.setVisible(true);
Right now this gives me the following output
whereas I want this
with an increased width but I am not able to do it..Could anyone provide me with further details that could help me
JPanel uses a FlowLayout by default, which, as the name suggests, layouts out components one after the after, in a flow...
Two choices. Use a compound layout, using BorderLayout as the base, create JPanel that uses a GridLayout for the radio buttons (using 0 rows and 1 column), add this to the CENTER position of the base panel.
Create a second JPanel using a FlowLayout and your buttons to it. Add this to the SOUTH position of the base pane.
Second choice is to use a GridBagLayout
Take a look at Laying out Components within a Container for more details