I have a panel that I am drawing some stuff on and I want to have an interface on top of it. I created an interface as a JPanel on netbeans, visually. But interface is not displayed properly.
Here is my code
public static void main(String[] args) {
JFrame frame = new JFrame("WorldGen");
Interface inter = new Interface();
JLayeredPane lpane = new JLayeredPane();
frame.setPreferredSize(new Dimension(600, 400));
frame.setLayout(new BorderLayout());
frame.add(lpane, BorderLayout.CENTER);
lpane.setBounds(0, 0, 600, 400);
lpane.add(panel, new Integer(0), 0);
lpane.add(inter, new Integer(1), 0);
panel.setBounds(0,0,600,400);
frame.setSize(300, 300);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
main = new Main();
}
Panel is declared as a static JPanel.
static JPanel panel = new JPanel()
Here is my result:
This is the Interface class that is created in netbeans visually
When I add this line:
inter.setBounds(0,0,600,400);
inter.setOpaque(true);
this is what I get:
Just a blank screen. I don't expect it to be transparent since I set it to opaque myself but It seems I have another problem. The button is not showing whether I set it to opaque or not.
Why is the button not showing? I am hoping that the button will still be visible when I set opaque to false, after I resolve this problem.
I've solved it by creating a JFrame in netbeans visually, adding a JPanel to it. Then using that panel(by overriding the paint method) to draw my image.
Related
I'm trying to setup the margin about the JPanel that it has inside the GridLayout refer to the JFrame, but I don't found the solution using other answer. I don't know if it's important problem, but also it show only the first button before I go to each button with mouse.
The image is an example, I want to setup the JPanel to start from the corner of the grid of image, because the image has a border (not from code, but from decoration board), the blue squares are the button inside the GridView, but I'm trying to fit the gridView to the image draw grid, using the set property (using proportion of pixel).
public class Gui extends JPanel implements View {
private final JPanel gui = new JPanel(new BorderLayout(3, 3));
private JButton[][] chessBoardSquares = new JButton[5][5];
private JPanel chessBoard;
private ImageIcon ArrayWithoutPlayer[] = new ImageIcon[7]; //{1,2,3,4,10,11,12}
private ImageIcon ArrayWithPlayer[] = new ImageIcon[3]; //{1,2,3}
private JFrame frame; //This is the whole frame
public Gui() {
createAndShowGUI();
}
private void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("TextDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Display the window.
frame.setSize(800, 800);
frame.setLocationRelativeTo(null);
frame.setResizable(false);
//frame.setLayout(new BoxLayout(frame.getContentPane(), BoxLayout.Y_AXIS));
//frame.pack();
frame.getContentPane().add(new ImagePanel( setImageIconFromUrl("/home/amministratore/Documenti/Java/ing-sw-2020-palini-rigutti-vangi/image/SantoriniBoardR.png",800,800).getImage()));
chessBoard = new JPanel(new GridLayout(0, 5));
chessBoard.setBorder(BorderFactory.createEmptyBorder(2,2,2,2));
//chessBoard.setLayout(new BoxLayout());
//chessBoard.setPreferredSize(new Dimension(400, 100));
chessBoard.setBackground(Color.blue);
//chessBoard.setAlignmentX((float) (2.2/21)*frame.getWidth());
//chessBoard.setAlignmentY((float) (2.2/21)*frame.getHeight());
//chessBoard.setMaximumSize(new Dimension((16/21)*frame.getWidth(),(16/21)*frame.getHeight()));
//chessBoard.setAlignmentX(JLabel.LEFT_ALIGNMENT);
//chessBoard.setBorder(new LineBorder(Color.BLACK));
Insets buttonMargin = new Insets(0,0,0,0);
for (int ii = 0; ii < chessBoardSquares.length; ii++) {
for (int jj = 0; jj < chessBoardSquares[ii].length; jj++) {
JButton b = new JButton();
b.setMargin(buttonMargin);
b.setBorder(null);
b.setBorderPainted(false);
b.setContentAreaFilled(false);
b.setOpaque(false);
chessBoardSquares[ii][jj] = b;
b.setText("AA");
chessBoard.add(chessBoardSquares[ii][jj]);
}
}
//chessBoard.setOpaque( false );
chessBoard.setBackground(new Color(255,0,0,0));
frame.dispose();
frame.add(chessBoard);
frame.setVisible(true);
//chessBoardSquares[0][0].setIcon( ArrayWithoutPlayer[0]); //This is the method to set Icon inside the button
}
}
I'm trying to setup the margin about the jpanel that it has inside the GridLayout
//b.setMargin(buttonMargin);
//b.setBorder(null);
//b.setBorderPainted(false);
I don't think you need all that code.
Instead just set the Border of the button:
b.setBorder( new EmptyBorder(5, 5, 5, 5) );
Edit:
frame.getContentPane().add(new ImagePanel(...));
…
frame.add(chessBoard);
First of all frame.getContentPane().add(…) and frame.add(…) is the same thing. That is the component will be added to the content pane. The second format is just a shortcut for the first.
So you are attempting to add two components to the BorderLayout.CENTER. This will not work as the BorderLayout will only support a single component in any location.
Swing was designed with a parent/child relationship so it appears you want something like:
JFrame (content pane)
ImagePanel
chessBoard
So your logic should be something like:
ImagePanel background = new ImagePanel(…);
background.setLayout( new BorderLayout() );
background.add(chessPanel, BorderLayout.CENTER);
frame.add(background, BorderLayout.CENTER);
Now you have your parent/child relationship between the components.
frame.setSize(800, 800);
Don't set the size of the frame. (800, 800) is the wrong size. If your ImagePanel is (800, 800) then the frame must be bigger because the frame also includes the title bar and the border.
So instead your logic should be:
frame.pack();
frame.setVisible(true);
The pack() method will allow the frame to determine its own preferred size AFTER all the components have been added to the frame.
Note:
In you ImagePanel class you will also need to implement the getPreferresSize() method of your Image. This will allow the pack() method to work properly. Read the section from the Swing tutorial on Custom Painting for a working example.
So basically when I add a button it essentially pushes the black rectangle drawn in this program down, putting it out of its given location. How would you fix this?
import javax.swing.*;
import java.awt.*;
public class Grid {
public class homeGraphics extends JComponent {
homeGraphics() {
setPreferredSize(new Dimension(450, 600));
}
public void paint(Graphics g) {
super.paint(g);
g.fillRect(200, 275, 50, 50);
}
}
public void homeFrame() {
JFrame frame1 = new JFrame();
frame1.setSize(450, 600);
frame1.setResizable(false);
frame1.setDefaultCloseOperation(frame1.EXIT_ON_CLOSE);
JButton playButton = new JButton("Play");
playButton.setPreferredSize(new Dimension(60, 30));
JPanel panel1 = new JPanel();
panel1.add(playButton);
panel1.add(new homeGraphics());
frame1.add(panel1);
frame1.setVisible(true);
}
public static void main(String args[]) {
Grid frame = new Grid();
frame.homeFrame();
}
}```
it essentially pushes the black rectangle drawn in this program down, putting it out of its given location.
What do you mean out of its location? Painting is always done relative to the component. So your painting will always be done at (200, 275) of the component.
If you are attempting to paint at (200, 275) relative to the "frame", then don't. That is NOT how painting works.
Other problems with your code:
Don't attempt to set the size of your frame. If the custom panel is (450, 600) how can the frame possibly be the same size? The frame also contains the "title bar" and "borders". Instead of using setSize(), you invoke frame.pack()just beforeframe1.setVisible(….)`.
Class names start with an upper case character. Learn by example. Have you ever seen a class name in the JDK that doesn't start with an upper case character?
Custom painting is done by overriding paintComponent(…), not paint().
By default a JPanel uses a FlowLayout. So what you see it the button on one line and then the "HomeGraphics" class is too big to fit on the same line so it wraps the to the second line.
You should be more explicit when you do frame layout. So your code should be something like:
JPanel wrapper = new JPanel();
wrapper.add( playButton );
//JPanel panel1 = new JPanel();
//panel1.add(playButton);
//panel1.add(new homeGraphics());
JPanel panel1 = new JPanel( new BorderLayout() );
panel1.add(wrapper, BorderLayout.PAGE_START);
panel1.add(new HomeGraphics(), BorderLayout.CENTER);
Now the code shows your layout attempt more clearly.
I've tried a lot of different ways, but I will explain two and what was happening (no error messages or anything, just not showing up like they should or just not showing up at all):
First, I created a JPanel called layout and set it as a BorderLayout. Here is a snippet of how I made it look:
JPanel layout = new JPanel();
layout.setLayout(new BorderLayout());
colorChoice = new JLabel("Choose your color: ");
layout.add(colorChoice, BorderLayout.NORTH);
colorBox = new JComboBox(fireworkColors);
colorBox.addActionListener(this);
layout.add(colorBox, BorderLayout.NORTH);
In this scenario what happens is they don't show up at all. It just continues on with whatever else I added.
So then I just tried setLayout(new BorderLayout()); Here is a snippet of that code:
setLayout(new BorderLayout());
colorChoice = new JLabel("Choose your color: ");
add(colorChoice, BorderLayout.NORTH);
colorBox = new JComboBox(fireworkColors);
colorBox.addActionListener(this);
add(colorBox, BorderLayout.NORTH);
In this scenario they are added, however, the width takes up the entire width of the frame and the textfield (not shown in the snippet) takes up basically everything else.
Here is what I have tried:
setPreferredSize() & setSize()
Is there something else that I am missing? Thank you.
I also should note that this is a separate class and there is no main in this class. I only say this because I've extended JPanel instead of JFrame. I've seen some people extend JFrame and use JFrame, but I haven't tried it yet.
You created a JPanel, but didn't add it to any container. It won't be visible until it is added to something (a JFrame, or another panel that is in a frame somewhere up the hierarhcy)
You added two components to the same position in the BorderLayout. The last one added is the one that will occupy that position.
Update:
You do not need to extend JFrame. I never do, instead I always extend JPanel. This makes my custom components more flexible: they can be added in another panel, or they can be added to a frame.
So, to demonstrate the problem I will make an entire, small, program:
public class BadGui
{
public static void main(String[] argv)
{
final JFrame frame = new JFrame("Hello World");
final JPanel panel = new JPanel();
panel.add(new JLabel("Hello"), BorderLayout.NORTH);
panel.add(new JLabel("World"), BorderLayout.SOUTH);
frame.setVisible(true);
}
}
In this program I created a panel, but did not add it to anything so it never becomes visible.
In the next program I will fix it by adding the panel to the frame.
public class FixedGui
{
public static void main(String[] argv)
{
final JFrame frame = new JFrame("Hello World");
final JPanel panel = new JPanel();
panel.add(new JLabel("Hello"), BorderLayout.NORTH);
panel.add(new JLabel("World"), BorderLayout.SOUTH);
frame.getContentPane().add(panel);
frame.setVisible(true);
}
}
Note that in both of these, when I added something to the panel, I chose different layout parameters (one label I put in 'North' and the other in 'South').
Here is an example of a JPanel with a BorderLayout that adds a JPanel with a button and label to the "North"
public class Frames extends JFrame
{
public Frames()
{
JPanel homePanel = new JPanel(new BorderLayout());
JPanel northContainerPanel = new JPanel(new FlowLayout());
JButton yourBtn = new JButton("I Do Nothing");
JLabel yourLabel = new JLabel("I Say Stuff");
homePanel.add(northContainerPanel, BorderLayout.NORTH);
northContainerPanel.add(yourBtn);
northContainerPanel.add(yourLabel);
add(homePanel);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setLocationRelativeTo(null);
setExtendedState(JFrame.MAXIMIZED_BOTH);
setTitle("Cool Stuff");
pack();
setVisible(true);
}
public static void main(String[] args)
{
SwingUtilities.invokeLater(Frames::new);
}
}
The below suggestion is assuming that your extending JFrame.
Testing
First of all, without seeing everything, theres always a numerous amount of things you can try.
First off, after you load everything, try adding this in (Again, assuming your extending JFrame:
revalidate();
repaint();
I add this into my own Swing projects all the time, as it refreshes and checks to see that everything is on the frame.
If that doesn't work, make sure that all your JComponent's are added to your JPanel, and ONLY your JPanel is on your JFrame. Your JFrame cannot sort everything out; the JPanel does that.
JPanel window = new JPanel();
JButton button = new JButton("Press me");
add(window);
window.add(button); // Notice how it's the JPanel that holds my components.
One thing though, you still add your JMenu's and what-not through your JFrame, not your JPanel.
i am doing a small Gui in java. i am using setBounds methods to set the position of buttons etc on my JFrame , but problem is that when i use it with JPanel button is not visible on JFrame , and without JPanel its quite ok ,, see both the codes and please help me as i am beginner and facing these foolish problems .
This one is working fine
JFrame jframe = new JFrame("Working Fine");
jframe.setLayout(null);
JButton jbutton = new JButton("Position Test");
jbutton.setBounds(0, 0, 100, 100);
jframe.add(jbutton);
jframe.setSize(300,300);
jframe.setVisible(true);
Same code when i add Button to Jpanel then it does not work so whats wrong , please guide me
JFrame jframe = new JFrame("causing problem ");
jframe.setSize(300,300);
JPanel p = new JPanel();
jframe.setLayout(null);
JButton jbutton = new JButton("Position Test");
jbutton.setBounds(0, 0, 100, 100);
jframe.add(p);
p.add(jbutton);
p.setVisible(true);
//jframe.add(jbutton);
jframe.setVisible(true);
please help me in this small problem
You must get rid of the JPanel's layout, in order to set absolute positions:
p.setLayout(null);
The problem is that when you use absolute positioning, the JPanel component has no default size so does not appear. To get it to appear you could do
JFrame frame = new JFrame("No Problem");
JPanel panel = new JPanel() {
#Override
public Dimension getPreferredSize() {
return new Dimension(300, 300);
};
};
panel.setLayout(new FlowLayout(FlowLayout.CENTER));
JButton button = new JButton("Position Test");
panel.add(button);
frame.add(panel);
frame.pack();
frame.setVisible(true);
From Doing Without a Layout Manager
Although it is possible to do without a layout manager, you should use a layout manager if at all possible. A layout manager makes it easier to adjust to look-and-feel-dependent component appearances, to different font sizes, to a container's changing size, and to different locales.
The choice of layout manager will depend on how you wish to lay out the components.
See A Visual Guide to Layout Managers.
I want to show a textArea showing some text (will show log lines) , and have an animated gif hoovering above it. I tried the solution described here , but all I get is a grey screen. Hints?
public class TestLayeredPanes {
private JFrame frame = new JFrame();
private JLayeredPane lpane = new JLayeredPane();
public TestLayeredPanes() {
frame.setPreferredSize(new Dimension(600, 400));
frame.setLayout(new BorderLayout());
frame.add(lpane, BorderLayout.CENTER);
//Build the animated icon
JLabel buildingIcon = new JLabel();
buildingIcon.setIcon(new ImageIcon(this.getClass().getResource(
"/com/ct/tasks/cmviewer/gui/progress_bar.gif")));
JPanel iconPanel = new JPanel();
iconPanel.add(buildingIcon);
//Build the textArea
JTextArea textLog = new JTextArea("Say something");
JPanel textPanel = new JPanel();
textPanel.add(new JScrollPane(textLog));
//Add the panels to the layered pane
lpane.add(textPanel, 0);
lpane.add(iconPanel, 1);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
new TestLayeredPanes();
}
}
Try putting your animated GIF on the glass pane of your root pane:
http://download.oracle.com/javase/tutorial/uiswing/components/rootpane.html
JXLayer make easier to do that. Look at JXLayer samples.
You also can take a look at code of XSwingX
Since you started with a working example, why did you remove lines of code from the example you copied?
Layered panes don't use a layout manager therefore the size of your components are (0, 0), so there is nothing to display. The setBounds(...) method in the example are there for a reason.