I want to add two jPanels to a JFrame side by side. the two boxes are jpanels and the outer box is a jframe
I have these lines of code. I have one class called seatinPanel that extends JPanel and inside this class I have a constructor and one method called utilityButtons that return a JPanel object. I want the utilityButtons JPanel to be on the right side. the code I have here only displays the utillityButtons JPanel when it runs.
public guiCreator()
{
setTitle("Passenger Seats");
//setSize(500, 600);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container contentPane = getContentPane();
seatingPanel seatingPanel1 = new seatingPanel();//need to declare it here separately so we can add the utilityButtons
contentPane.add(seatingPanel1); //adding the seats
contentPane.add(seatingPanel1.utilityButtons());//adding the utility buttons
pack();//Causes this Window to be sized to fit the preferred size and layouts of its subcomponents
setVisible(true);
}
The most flexible LayoutManager I would recommend is BoxLayout.
You can do the following :
JPanel container = new JPanel();
container.setLayout(new BoxLayout(container, BoxLayout.X_AXIS));
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
//panel1.set[Preferred/Maximum/Minimum]Size()
container.add(panel1);
container.add(panel2);
then add container to object to your frame component.
You need to read up on and learn about the layout managers that Swing has to offer. In your situation it will help to know that a JFrame's contentPane uses BorderLayout by default and you can add your larger center JPanel BorderLayout.CENTER and the other JPanel BorderLayout.EAST. More can be found here: Laying out Components in a Container
Edit 1
Andrew Thompson has already shown you a bit on layout managers in his code in your previous post here: why are my buttons not showing up?. Again, please read the tutorial to understand them better.
Related
I recently found out that you can put a JPanel inside another JPanel, I tried it and it didn't quite do what I expected.I'm trying to have one button in the center and one button on the bottom right of the panel, I'm using a BorderLayout for all my panels.When I tried using two panels inside the center panel, the two panels were on the same line, but I've coded that one needed to be on the top and one on the bottom.Does anyone know how I could resolve this?
Sorry for not adding the code in the place, wasn't sure and I had already deleted it so I quickly made this, it is the same code I used in my project.
My code:
JFrame frame = new JFrame();
JButton btn = new JButton();
JPanel center = new JPanel();
JPanel top = new JPanel();
JPanel bot = new JPanel(new FlowLayout(FlowLayout.RIGHT));
bot.add(btn);
center.add(top, BorderLayout.PAGE_START);
center.add(bot, BorderLayout.PAGE_END);
frame.add(center, BorderLayout.CENTER);
When I use this code, "bot" is going to be displayed on the right of "top".
I think it has to do with the layout of "center" but I'm not sure.
Set the LayoutManager of center to BorderLayout, with this method:
center.setLayout(new BorderLayout());
I have been used setComponentZOrder(Component com,int index) for JPanel(panel1) shown as below
panel1.setComponentZOrder(panel2, 0);
Here panel2 is my second panel. Now it is shown panel2 instead of panel1. I want to rearrange panel1 as original panel1. How to do it?
ZOrder is used to control the order in which child components are painted on a parent component.
If you want to display panel1, in the frame instead of panel2, then you should not be playing with ZOrder.
Instead you should be using layout managers. Specifically you should be using a CardLayout on a parent panel and then you add panel1 and panel2 to this panel. Then you can use the CardLayout to swap panels.
The basics of using a CardLayout is:
JPanel parent = new JPanel( new CardLayout() );
JPanel child1 = new JPanel();
JPanel child2 = new JPanel();
parent.add(child1, "child1");
parent.add(child2, "child2");
Then when you want to display a different panel you use code like:
CardLayout cl = (CardLayout)(parent.getLayout());
cl.show(parent, "child2");
Read the section from the Swing tutorial on How to Use CardLayout for more information and working examples.
I try to do simple game, made of few 'screens' (menu, options, etc), which could work by displaying and hiding several JPanels. When I add some stuff on each panel and run the program, the only thing that appears is empty JFrame. I've made id looking like this:
public class Frame extends JFrame{
JPanel panel1 = new JPanel();
JFrame frame = new JFrame("halo");
JButton button = new Button();
int WIDTH=600,HEIGHT=600;
public Frame(){
frame.add(game);
frame.setSize(WIDTH, HEIGHT);
frame.setVisible(true);
frame.setResizable(false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(panel1);
panel1.setBounds(0,0,WIDTH,HEIGHT)
panel1.add(button);
button.setBounds(10,10,30,30);
}}
Everything essential is imported and declared, it's just 'simpled' version. What's wrong with it?
A few things:
Using the classname Frame may conflict with java.awt.Frame.
You have to set the frame visible by calling frame.setVisible(true); Before that, call frame.pack();
You are subclassing JFrame, but also declaring and preparing a different JFrame. Eliminate one of them.
Add the components to the content pane of the JFrame: frame.getContentPane().add(subcomponent);
Setting a layout manager and packing after adding elements should fix the issue. Also it's unclear why you're referring to frame when you're constructing this. Try this version:
public class Frame extends JFrame{
JPanel panel1 = new JPanel();
JButton button = new Button();
int WIDTH=600,HEIGHT=600;
public Frame(){
setTitle("Halo");
setLayout(new BorderLayout());
add(panel1, BorderLayout.CENTER);
panel1.setBounds(0,0,WIDTH,HEIGHT);
panel1.setLayout(new BorderLayout());
panel1.add(button, BorderLayout.SOUTH);
button.setBounds(10,10,30,30);
pack();
setVisible(true);
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
JFrame uses a BorderLayout by default, this means that only one component can occupy each of the five available positions that BorderLayout managers.
By default, if you don't specify where you want the component to be, it will be added to the CENTRE position
You should break your UI down into logical units and use JPanels to manage them
You can use a combination of panels and layouts to generate complex UIs
You should also consider using a CardLayout to allow you to switch between base views
You should also call setVisible on the JFrame last, after you've established the basic UI, otherwise you'll need to call revalidate and and repaint to update the UI
You should avoid using setBounds/setSize/setLocation on components and rely on the use of layout managers, as they are designed to manage the differences in rendering pipelines that occurs across multiple different operating systems and hardware platforms
I want to add two jPanels to a JFrame side by side. the two boxes are jpanels and the outer box is a jframe
I have these lines of code. I have one class called seatinPanel that extends JPanel and inside this class I have a constructor and one method called utilityButtons that return a JPanel object. I want the utilityButtons JPanel to be on the right side. the code I have here only displays the utillityButtons JPanel when it runs.
public guiCreator()
{
setTitle("Passenger Seats");
//setSize(500, 600);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container contentPane = getContentPane();
seatingPanel seatingPanel1 = new seatingPanel();//need to declare it here separately so we can add the utilityButtons
contentPane.add(seatingPanel1); //adding the seats
contentPane.add(seatingPanel1.utilityButtons());//adding the utility buttons
pack();//Causes this Window to be sized to fit the preferred size and layouts of its subcomponents
setVisible(true);
}
The most flexible LayoutManager I would recommend is BoxLayout.
You can do the following :
JPanel container = new JPanel();
container.setLayout(new BoxLayout(container, BoxLayout.X_AXIS));
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
//panel1.set[Preferred/Maximum/Minimum]Size()
container.add(panel1);
container.add(panel2);
then add container to object to your frame component.
You need to read up on and learn about the layout managers that Swing has to offer. In your situation it will help to know that a JFrame's contentPane uses BorderLayout by default and you can add your larger center JPanel BorderLayout.CENTER and the other JPanel BorderLayout.EAST. More can be found here: Laying out Components in a Container
Edit 1
Andrew Thompson has already shown you a bit on layout managers in his code in your previous post here: why are my buttons not showing up?. Again, please read the tutorial to understand them better.
I have a simple swing application which consists of a JLabel and three buttons. The three buttons are in their own JPanel which is in a JFrame along with the JLabel. The JPanel uses flowlayout manager to arrange the buttons horizontally and the JFrame uses the BorderLayout manager to arrange the JLabel and JPanel vertically.
My problem is when I launch the application, during the course of use the text on one of the buttons changes which increases its width. However, the window doesn't resize to accomdate this and one of the buttons disappears. I thought about calling pack() again, but the JFrame is a local variable in my constructor, also, I shouldn't have to tell my program to resize, right? I haven't been able to find anything on google or here to help me but there must be a simple solution, what am I missing? Code is below.
playButton = new JButton("Play");
pauseButton = new JButton("Pause");
stopButton = new JButton("Stop");
curTrackLabel = new JLabel("No Track Selected");
JFrame myFrame = new JFrame("MediaPlayer");
myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myFrame.setTitle("MediaPlayer");
myFrame.setLocation(400,300);
JPanel topPanel = new JPanel();
topPanel.setLayout(new BorderLayout());
myFrame.add(topPanel);
JPanel buttonPanel = new JPanel(new FlowLayout());
buttonPanel.add(playButton);
buttonPanel.add(pauseButton);
buttonPanel.add(stopButton);
topPanel.add(buttonPanel, BorderLayout.CENTER);
topPanel.add(curTrackLabel, BorderLayout.NORTH);
playButton.addActionListener(new playButtonHandler());
pauseButton.addActionListener(new pauseButtonHandler());
stopButton.addActionListener(new stopButtonHandler());
myFrame.pack();
myFrame.setVisible(true);
Maybe try
((JFrame)myButton.getTopLevelAncestor()).pack();
Where myButton is the button whose text is modified during execution.
As with learning any GUI software, experimentation is best. Try messing with BorderLayouts with nested JPanels.
Ultimately, you use JPanel with a BorderLayout (Flow Layout is OK but really when resizing the window, it epically fails). See http://download.oracle.com/javase/tutorial/uiswing/layout/border.html to learn more about BorderLayouts.
Now for your layout scheme it should be something along the lines of:
Top Level Container: JFrame
JFrame contains a JPanel (Call this
JPanel 1) with a BorderLayout.
The three buttons should be in a
SEPARATE jPanel (JPanel 2). JPanel
1 should add the three buttons as
BorderLayout.CENTER. In this way,
the window will resize if the button
changes its width and/or hright.
The JLabel should be added as
BorderLayout.LINE_START.
The tutorial at: http://download.oracle.com/javase/tutorial/uiswing/layout/border.html should help you with this. But in general, use the following:
Use JPanel and nest JPanels as necessary
BorderLayout.CENTER will accomodate size changes---this is the key! (Experiment with this)
JFrame should only be used as a top level container (for more complex GUIs, this is true).
If you require more flexibility, check out JGoodies: http://www.jgoodies.com/ . This is more along the lines of creating forms.