We are working on a project where we encountered a problem with including more than two Panels on the same JFrame .What we want is one Panel above the other.
Can the community help give an example of ho to implement this or refer me to a good tutorial or guide related to our Java Swing needs?
Assuming you want two panels added to a single frame:
Set a layout for your parent JFrame and add the two panels. Something like the following
JFrame frame = new JFrame();
//frame.setLayout(); - Set any layout here, default will be the form layout
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
frame.add(panel1);
frame.add(panel2);
Assuming you want to add one panel over the other
JFrame frame = new JFrame();
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
frame.add(panel1);
panel1.add(panel2);
There is no limit on the number of panels to be added on the JFrame. You should understand that they all are containers when seen on a higher level.
if you want each of the frames/panels the same size, use the GridLayout, with a grid of 1(column) and 2(rows)
Frame myFrame;
GridLayout myLayout = new GridLayout(2,1);
myFrame.setLayout(myLayout);
Panel p1;
Panel p2;
myFrame.add(p1);
myFrame.add(p2);
if the panels are different size use the BorderLayout.... set the upper frame to "North" and the lower one to "South" or "Center"
Frame myFrame;
myFrame.setLayout(new BorderLayout() );
Panel p1;
Panel p2;
myFrame.add(p1, BorderLayout.NORTH);
myFrame.add(p2, BorderLayout.CENTER);
//you can also use card Layout, that enables you to add multiple card-panels on Main panel.
CardLayout cl;
JPanel main,one,two,three;
JButton button1,button2;
cl = new CardLayout();
main.setLayout(cl);
main.add(one,"1");
main.add(two,"2");
main.add(three,"3");
cl.show(main,"1");
public void actionPerformed(ActionEvent e){
if(e.getSource() == button1)
cl.show(main,"2");
else if(e.getSource() == button2)
cl.show(main,"3");
}
Related
I am trying to make a minesweeper that has a different space for a smiley icon that we can click and the buttons which we have to click to play.
public final class testFrame extends JFrame implements MouseListener, ActionListener {
private JFrame screen = null;
private JPanel composite = new JPanel();
public testFrame() {
screen = new JFrame();
screen.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
screen.setVisible(true);
screen.setResizable(true);
composite.setLayout(new BorderLayout());
//this button is not showing also
JButton button = new JButton("Text goes here");
composite.add(button);
Container cp = screen.getContentPane(); // JFrame's content-pane
cp.setLayout(new GridLayout(5, 5, 2, 2)); // in 10x10 GridLayout
//codes to add buttons
}
So here I am trying to add the container cp to the screen. But it opened
two screen
Sorry if this seems like minor things but I am really new to this java GUI so please help me.
EDIT:
I removed the extends JFrame and used the screen instead. It kinda works but I can't seem to put the container cp to a panel. The requirement is that I have to use container cp. So I cannot change. Thank you
public final class TestFrame implements MouseListener, ActionListener {
private JFrame screen = null;
private JPanel composite = new JPanel();
private JPanel topPanel = new JPanel();
public TestFrame() {
screen = new JFrame("TestFrame");
screen.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
screen.setVisible(true);
topPanel.setLayout(new BorderLayout());
//composite.setLayout(new BorderLayout());
//button in topPanel
JButton button = new JButton("Text goes here");
topPanel.add(button, BorderLayout.PAGE_START);
//Content Pane
Container cp = screen.getContentPane();// JFrame's content-pane
cp.setLayout(new GridLayout(5, 5, 2, 2)); // in 10x10 GridLayout
//composite.add(cp, BorderLayout.CENTER);
screen.add(topPanel);
// screen.add(composite);
}
Now it looks like
this
There are a few things.
You are extending JFrame as well as using it as an attribute of the same class so you can ether use this instead of screen or you remove the extends JFrame as it is redundant and not needed
To answer your question. A JFrame contains a Panel called ContentPane this pane is were you add you panels to (you already did the layout thing right). So the solution is:
cp.add(composite);
You've got too many JFrames, the testFrame class which extends JFrame (and which should be re-named TestFrame to comply with Java naming conventions) and the screen variable. Use only one.
You can and should nest JPanels to achieve your desired result. For instance if you want a grid as well as some control buttons, create a JPanel, give it a BorderLayout, put your grid JPanel in the BorderLayout.CENTER postion and a JPanel with control JButtons in a different position, say BorderLayout.PAGE_START
I currently have a Jframe that I want to add to a tab instead.
(I used a frame just for testing purposes, to make sure the look and feel is correct, but when trying to add it to a JTabbedPane, the frame starts to look blue (weird top aswell).
I tried copying my settings from my original frame to the new frame but that did not help.
JTabbedPane tabs = new JTabbedPane();
tabs.addTab("1", frame.getContentPane());
JFrame FinalFrame = new JFrame();
FinalFrame.setDefaultLookAndFeelDecorated(true);
FinalFrame.setSize(WIDTH, HEIGTH);
FinalFrame.setLocation(100, 150);
FinalFrame.setTitle("Primal-Pvm Notification center");
FinalFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
FinalFrame.add(tabs);
Side by side view of the problem and the frame before adding it to the tab:
Edit: Answer by George Z. helped me out a lot.
Like he said to solve the problem:
Don't add things to your main frame but add them to a Jpanel and add that to a JTabbedPane.
If you have a Jpanel that you are adding to a tab that contains an override in the paintComponent, you have to create that class as the Jpanel so:
JPanel panel = new LineDrawer([Enter parameters]);
panel.setLayout([Enter Layout]);
The way you are approaching this seems to be pretty complex hence this weird behavior. (Looks like a look and feel problem? - show the part of the code that sets it)
However, I suggest you to create only one JFrame (this question explains why you should do that), set the layout of its content pane to BorderLayout and keep it like this. Its a rare situation to mess up with content panes. After that create independent JPanels representing the tab(s) you would like to have. Finally create a JTabbedPane with these panels and add it to the content frame of the JFrame.
A small example would be:
public class TabbedPanelExample extends JFrame {
public TabbedPanelExample() {
super("test");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLayout(new BorderLayout());
JTabbedPane pane = new JTabbedPane();
pane.addTab("FirstTab", createFirstTab());
pane.addTab("SecondTab", createSecondTab());
add(pane);
setSize(400, 400);
setLocationRelativeTo(null);
}
private Component createFirstTab() {
JPanel panel = new JPanel(new FlowLayout());
panel.add(new JLabel("Some Component"));
panel.add(new JTextField("Some Other Component"));
return panel;
}
private Component createSecondTab() {
JPanel panel = new JPanel(new FlowLayout());
panel.add(new JLabel("Some Component"));
panel.add(new JButton("Some Other Component"));
return panel;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
new TabbedPanelExample().setVisible(true);
});
}
}
Post edit based on this comment:
Well I do have a Jframe with a lot of elements added to it so it kinda
is a hassle to switch it all to panels;
A JFrame cannot have a lot of elements. You take a look on how to use root panes. The container that "has a lot of elements" of a JFrame is its rootpane which is mostly completed by its contentpane. When you frame.add(component), you add the component to its content pane. Guess what? A JFrame's content pane is a JPanel. So are a already to panels.
Now in order to make this work, try to do as i said and frame.setLayout(new BorderLayout(); //changes layout to contentpane. Assuming you have a bunch of components (lets say comp1,comp2) and you are adding them like:
frame.add(comp1);
frame.add(comp2);
You must do the following in order to make it clear. Create a JPanel and instead of frame.add(comp1), do panel.add(comp1). So this JPanel has all the components you added in JFrame. After that create your JTabbedPane:
JTabbedPane pane = new JTabbedPane();
pane.addTab("tab", panel);
and finally add this pane to the content pane of your JFrame:
frame.add(pane);
In conclusion, you will move all the components you have added to your frame into a JPanel, add this JPanel to a JTabbedPane, and finally add this JTabbedPane to the frame (contentpane). Frame has only one component.
I am trying to make a GUI for a game. I am very new to Java, especially GUI. The code below is a snippet which is supposed to make a JFrame with nested panels for organization. It works until I add buttons to the button panel. They end up on the boardBckg panel. If I manage to place them on the correct panel the JTextField disappears or it takes up the entire screen. I have been working on this part of the code for the past two days and I could really use GUI tips.
private void makeWindow()
{
boardPanel = new JPanel();
boardBckg = new JPanel();
menuPanel = new JPanel();
save = new JButton("Save");
save.setSize(Buttons);
load = new JButton("Load");
load.setSize(Buttons);
replay = new JButton ("Replay");
replay.setSize(Buttons);
words = new JTextField();
frame = new JFrame(title);
boardPanel.setSize(PANEL);
boardPanel.setMaximumSize(MAX);
boardPanel.setMinimumSize(MIN);
boardPanel.setLayout(new GridLayout(m,n));
boardBckg.setSize(1000, 1000);
boardBckg.setBackground(Color.cyan);
boardBckg.add(boardPanel, BorderLayout.CENTER);
frame.setSize(1500, 1000);
frame.setResizable(false);
frame.setVisible(true);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
BoxLayout vertical = new BoxLayout(menuPanel, BoxLayout.Y_AXIS);
menuPanel.setSize(500, 1000);
menuPanel.setBackground(Color.blue);
menuPanel.setLayout(vertical);
frame.add(boardBckg);
frame.add(menuPanel);
JPanel iGiveUp = new JPanel();
iGiveUp.setBackground(Color.black);
JPanel buttons = new JPanel();
buttons.setBackground(Color.darkGray);
buttons.add(save);
buttons.add(load);
buttons.add(replay);
menuPanel.add(iGiveUp);
menuPanel.add(buttons);
iGiveUp.add(words);
boardBckg.add(boardPanel, BorderLayout.CENTER);
The default layout of a JPanel is the FlowLayout. You can't just specify a BorderLayout constraint when you add the component to the panel.
frame.add(boardBckg);
frame.add(menuPanel);
The default layout for (the content pane of) the frame is a BorderLayout. If you don't specify a constraint, then the component is added to the BorderLayout.CENTER. Problem is only one component can be added to the CENTER so you only see the last comoponent added.
frame.setVisible(true);
Component should be added to the frame BEFORE the frame is packed and made visible. So the above statement should be the last statement in your constructor.
I have no ideas what your desired layout is but you need to start with something simple and take advantage of the default BorderLayout of the frame.
So your basic logic might be something like:
JPanel menuPanel = new JPanel()
menuPanel.setLayout(new BoxLayout(menuPanel, BoxLayout.Y_AXIS));
menuPanel.add(...);
menuPanel.add(...);
JPanel center = new JPanel();
center.setLayout(...);
center.setBackground( Color.BLUE );
center.add(...);
frame.add(menuPanel, BorderLayout.LINE_START);
frame.add(center, BorderLayout.CENTER);
frame.pack();
frame.setVisible( true );
The main point is to break the panels down logically and add them to the frame one at a time. So first get the menu and its child components added to the frame is the correct position. Then you can add the CENTER panel and its child components.
I have created a password generator in Java which works perfectly. My functionality is working (after a lot of tears, sweat and blood :) ), but the only problem that remains is the layout of my GUI.
My approach was the following:
1 pane (Top/North) for the title
1 pane in the center for the form
1 pane (bottom/south) for the buttons and textfield
This is the result
as you can see this is not how I wanted it. But if I look at my code, it should be placed nicely from top to bottom.
Where did it go wrong?
My code:
The constructor (extends from JFrame)
public PasswordGenerator(){
this.setContentPane(ContentPane());
this.setSize(500,270);
this.setResizable(true);
this.setVisible(true);
}
The panes:
private JPanel ContentPane()
{
JPanel ContentPane = new JPanel();
ContentPane.add(getTopPane(), BorderLayout.NORTH);
ContentPane.add(getCenterPane(),BorderLayout.CENTER);
ContentPane.add(getSouthPane(),BorderLayout.EAST);
return ContentPane;
}
private JPanel getTopPane(){
JPanel TopPane = new JPanel();
JLabel intro = new JLabel("Password generator V1.0");
intro.setFont(new Font("TimesRoman",Font.BOLD,20));
TopPane.setLayout(new GridLayout(1,1));
TopPane.add(intro);
return TopPane;
}
private JPanel getCenterPane(){
JPanel CenterPane = new JPanel();
CenterPane.add(aantalChars);
CenterPane.setLayout(new GridLayout(6,3));
//8,2
hidden.setVisible(false);
hiddenL.setVisible(false);
CenterPane.add(aantalCharsLabel);
CenterPane.add(hidden);
CenterPane.add(hidden);
CenterPane.add(hiddenL);
CenterPane.add(lowerCase);
CenterPane.add(lowerCaseLabel);
CenterPane.add(upperCase);
CenterPane.add(upperCaseLabel);
CenterPane.add(numberCase);
CenterPane.add(numberCaseLabel);
CenterPane.add(symbolCase);
CenterPane.add(symbolCaseLabel);
return CenterPane;
}
You forgot to set the BorderLayout as LayoutManager on your ContentPane. Just using the right constraints is not enough. You can use ContentPane.setLayoutManager() for this, or you can give the LayoutManager directly in the constructor of JPanel.
The default layout manager for JPanel is FlowLayout manager.
To use BorederLayout you need to set it specifically :
private JPanel ContentPane()
{
JPanel ContentPane = new JPanel();
//////////////////////////////////////////////
ContentPane.setLayout(new BorderLayout());
////////////////////////////////////////////
ContentPane.add(getTopPane(), BorderLayout.NORTH);
ContentPane.add(getCenterPane(),BorderLayout.CENTER);
ContentPane.add(getSouthPane(),BorderLayout.SOUTH);
return ContentPane;
}
I am using BorderLayout in my application. I have a main panel to which I add two JPanels at the center. I want one of them to be transparent.
My code is :
mainPanel = new JPanel();
mainPanel.setLayout(new BorderLayout());
mainPanel.add(getGraphPaneScrollPane(), BorderLayout.CENTER);
mainPanel.add(getSituationPanel(), BorderLayout.CENTER);
Code for these two functions is :
public JScrollPane getGraphPaneScrollPane() {
if (graphPaneScrollPane == null) {
graphPaneScrollPane = new JScrollPane();
graphPaneScrollPane.setViewportView(getGraphEditorPane());
}
return graphPaneScrollPane;
}
private JScrollPane getSituationPanel(){
if(situationPanel == null){
logs.debug("Initializing Situation Panel");
situationPanel = new JScrollPane();
situationLabel = new JLabel("");
situationLabel.setVerticalTextPosition(JLabel.BOTTOM);
situationLabel.setHorizontalTextPosition(JLabel.CENTER);
situationLabel.setVerticalAlignment(JLabel.TOP);
situationLabel.setHorizontalAlignment(JLabel.CENTER);
situationLabel.setBorder(BorderFactory.createTitledBorder(""));
situationLabel.setBackground(Color.WHITE);
situationLabel.setOpaque(true);
situationLabel.setVerticalAlignment(SwingConstants.TOP);
situationPanel.setViewportView(situationLabel);
}
return situationPanel;
}
Now I want situationPanel to be transparent and getGraphPaneScrollPane to be above that in the GUI, because getGraphPaneScrollPane is the canvas, which I use to draw nodes.
I want situationPanel to be transparent and getGraphPaneScrollPane to be above that in the GUI,
The panel that is on top is the panel that needs to be transparent. If the panel on top is opaque then you will never see the panel under the top panel.
So making changes to the layout is the last thing I want.
Well that is what you are going to need to do. You can't just add two panels to one panel and expect it to work the way you want it to. Most Swing layout managers are designed to lay out components in two dimensions, not on top of one another.
Your current code is:
mainPanel.setLayout(new BorderLayout());
mainPanel.add(getGraphPaneScrollPane(), BorderLayout.CENTER);
mainPanel.add(getSituationPanel(), BorderLayout.CENTER);
You could try using the OverlayLayout, it is designed to lay out panels on top of on another. The code should be something like:
JPanel overlay = new JPanel();
overlay.setLayout( new OverlayLayout(overlay) );
overlay.add(getSituationPanel(), BorderLayout.CENTER); // add transparent panel first
overlay.add(getGraphPaneScrollPane(), BorderLayout.CENTER);
mainPanel.setLayout(new BorderLayout());
mainPanel.add(overlay);