Image of my GUI.
I am trying to add components to two JPanel containers and then add those panels as cards. I want the checkboxes after labels in a vertical manner. The problem I am facing is that the components are coming in a grid of two columns:
public class MyFrame extends JFrame {
MyFrame(int width, int height, String title){
setTitle(title);
setSize(width, height);
JPanel internalJP1 = new JPanel(new GridLayout(5,1));
JLabel hobby = new JLabel("Enter your hobbies:");
JCheckBox cricket = new JCheckBox("Cricket");
JCheckBox music = new JCheckBox("Music");
JCheckBox drawing = new JCheckBox("Drawing");
JCheckBox dancing = new JCheckBox("Dancing");
JCheckBox other = new JCheckBox("Other");
internalJP1.add(hobby);
internalJP1.add(cricket);
internalJP1.add(music);
internalJP1.add(drawing);
internalJP1.add(dancing);
internalJP1.add(other);
JPanel internalJP2 = new JPanel(new GridLayout(4,1));
JLabel payment = new JLabel("Payment by:");
ButtonGroup buttonGroup = new ButtonGroup();
JRadioButton cheque = new JRadioButton("Cheque", false);
JRadioButton cash = new JRadioButton("Cash", false);
JRadioButton debitCard = new JRadioButton("Debit Card", false);
JRadioButton creditCard = new JRadioButton("Credit Card", false);
buttonGroup.add(cheque);
buttonGroup.add(cash);
buttonGroup.add(debitCard);
buttonGroup.add(creditCard);
internalJP2.add(payment);
internalJP2.add(cheque);
internalJP2.add(cash);
internalJP2.add(debitCard);
internalJP2.add(creditCard);
Container c = getContentPane();
CardLayout cl = new CardLayout();
c.setLayout(cl);
c.add(internalJP1,"crd1");
c.add(internalJP2,"crd2");
cl.show(c,"crd1");
}
}
public class Jtest {
public static void main(String[] args) {
MyFrame frame = new MyFrame(300,200,"FirstFrame");
frame.setVisible(true);
}
}
Just change this line of code (in constructor of class MyFrame)
JPanel internalJP1 = new JPanel(new GridLayout(5,1));
to this
JPanel internalJP1 = new JPanel(new GridLayout(0,1));
i.e. replace 5 with 0
I find GridLayout to not be intuitive. When the row parameter of GridLayout constructor is zero, then each row will contain exactly the number of columns indicated. Hence new GridLayout(0, 1) will ensure that each row (in the grid) will contain exactly one column and it will create as many rows as required in order to ensure this.
Note that GridLayout is not the only layout manager to use when you want to place GUI components in a single column. Swing also has BoxLayout, GridBagLayout, GroupLayout and SpringLayout.
There are also third party layout managers including JGoodies and MiG Layout.
The fact that you are using a CardLayout to view one panel or the other does not affect the layout of those panels. Your problem is entirely related to the layout of the 2 panels.
There are 2 easy ways to fix the panels to make them 1-column:
fix their number of rows so that it is >= the number of elements that you actually add. Now, you have JPanel internalJP1 = new JPanel(new GridLayout(5,1)); - but add 6 elements. If you change it to JPanel internalJP1 = new JPanel(new GridLayout(6,1));, you will solve the problem for your 1st panel. The same fix applies to your second panel. Even better, use 0 to make the layout use as many rows as it needs (see docs).
use a vertical BoxLayout and do not worry about the number of elements at all - just stack them vertically. This has the additional advantage that they look better, because even if you give the layout more size than it needs, they still stack together nicely: JPanel internalJP1 = new JPanel(); internalJP1.setLayout(new BoxLayout(internalJP1, BoxLayout.Y_AXIS));
Related
I am trying to figure out the layout for this(the rest of the code is in the early stages) but for this block, I am trying to figure out the best(and doable) way to format it. I want it to be an 8x8 grid that I will eventually populate with the treasure/empty buttons but I also need a title up top as well as some labels and text on the left. I am unsure if I am able to do multiple grids but what I did below is try to create a 1x2 grid and then place two other grids inside, one with the info on the left(3x2), and another with the 8x8 grid for the buttons. I know it's not close to what it needs to be but none of the grids are showing up at all(it's just putting the title and then one column with 8 rows) and I wanna know if I'm even on any sort of right track, or if I'm just making things up at this point. Any tips would be appreciated, or resources about possibly nesting the grids? I can't find anything in my book about That specifically.
private void buildPanel()
{
// Create labels to display the
treasuresLeftLabel = new JLabel("Treasures left: ");
treasuresFoundLabel = new JLabel("Treasures found: ");
triesLeftLabel = new JLabel("Tries left: ");
// Create text fields for each label
treasuresLeftTextField = new JTextField(2);
treasuresLeftTextField.setEditable(false);
treasuresLeftTextField.setText(String.valueOf(20-game.getTreasuresFound()));
treasuresFoundTextField = new JTextField(2);
treasuresFoundTextField.setEditable(false);
treasuresFoundTextField.setText(String.valueOf(game.getTreasuresFound()));
triesLeftTextField = new JTextField(2);
triesLeftTextField.setEditable(false);
triesLeftTextField.setText(String.valueOf(game.getTriesLeft()));
emptyButton = new EmptyButton();
emptyButton.addActionListener(new emptyButtonListener());
treasureButton = new TreasureButton();
treasureButton.addActionListener(new treasureButtonListener());
// new JPanel object referenced by panel
panel = new JPanel();
panel.setBorder(BorderFactory.createTitledBorder("Treasure Hunt"));
// Add a gridlayout to the content pane
panel.setLayout(new GridLayout(1, 2));
panel.setLayout(new GridLayout(3, 2));
panel.add(treasuresLeftLabel);
panel.add(treasuresLeftTextField);
panel.add(treasuresFoundLabel);
panel.add(treasuresFoundTextField);
panel.add(triesLeftLabel);
panel.add(triesLeftTextField);
panel.setLayout(new GridLayout(8, 8));
panel.add(treasureButton);
panel.add(emptyButton);
}
You can't use multiple grids within the same JPanel - one panel, one layout manager.
But you can nest layout managers (and thereby grids) by using nested panels.
For example you could use a BorderLayout for the first panel (containing the title at the top, the info panel on the left and the button panel in the center.
The code to construct those panel then might look like this:
// panel contains the complete UI
panel = new JPanel();
panel.setBorder(BorderFactory.createTitledBorder("Treasure Hunt"));
panel.setLayout(new BorderLayout());
panel.add(new JLabel("This is the Title"), BorderLayout.PAGE_START);
JPanel infoPanel = new JPanel();
infoPanel.setLayout(new GridLayout(3, 2));
infoPanel.add(treasuresLeftLabel);
infoPanel.add(treasuresLeftTextField);
infoPanel.add(treasuresFoundLabel);
infoPanel.add(treasuresFoundTextField);
infoPanel.add(triesLeftLabel);
infoPanel.add(triesLeftTextField);
panel.add(infoPanel, BorderLayout.LINE_START);
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(8, 8));
buttonPanel.add(treasureButton);
buttonPanel.add(emptyButton);
for (int i = 0; i < 62; i++) {
buttonPanel.add(new JButton(String.format("%02d", i)));
}
panel.add(buttonPanel, BorderLayout.CENTER);
I've bee teaching myself java and following along with the problems in the book. I'm trying to make a display for my calculator. In the example(I did not attach this) the buttons were a smaller size than what mine are and I can't figure out how to reformat them. I tried using the dimension class but it had no affect. Also, I can't get my text at the top of the calculator to align left.
Here is my code:
public class Calculator extends JFrame {
public Calculator() {
setTitle("Calculator");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setSize(300, 300);
setLayout(new BorderLayout());
JPanel numberPanel = new JPanel();
add(numberPanel, BorderLayout.CENTER);
numberPanel.setLayout(new GridLayout(4, 3, 3, 3));
for(int i = 1; i < 10; i++) {
JButton button = new JButton(String.valueOf(i));
numberPanel.add(button);
}
JButton zero = new JButton("" + 0);
JButton dot = new JButton(".");
JButton clear = new JButton("C");
numberPanel.add(zero);
numberPanel.add(dot);
numberPanel.add(clear);
JPanel keyPanel = new JPanel();
add(keyPanel, BorderLayout.EAST);
keyPanel.setLayout(new GridLayout(4, 1, 3, 3));
JButton plus = new JButton("+");
JButton minus = new JButton("-");
JButton times = new JButton("*");
JButton divide = new JButton("/");
keyPanel.add(plus);
keyPanel.add(minus);
keyPanel.add(times);
keyPanel.add(divide);
JPanel equalsPanel = new JPanel();
add(equalsPanel, BorderLayout.SOUTH);
equalsPanel.setLayout(new GridLayout(1, 1));
JButton equals = new JButton("=");
equalsPanel.add(equals);
JPanel textPanel = new JPanel();
add(textPanel, BorderLayout.NORTH);
JTextField inputBox = new JTextField("0.0");
inputBox.setHorizontalAlignment(JTextField.LEFT);
inputBox.setEditable(false);
Font font = new Font("MonoSpaced", Font.BOLD, 20);
inputBox.setFont(font);
textPanel.add(inputBox);
setVisible(true);
}
public static void main(String[] args) {
new Calculator();
}
}
Imports were left off for brevity
GridLayout will laugh at you when you try and set a dimension. It does respect preferred sizes. You should select a layout manager that will respect preferred sizes. Or you can simply pack() (after you add all your components) your frame instead of setSize() and all the components preferred sizes will kick in. (Disclaimer - because of GridLayout though, if you try and resize the frame after that, you components will resize again)
See more at How to use Layout Managers. For a quick view of which layout managers respect preferred sizes and which ones don't, have a look at this post.
A common approach is to nest panels with different layout managers also, as seen here
UPDATE
As mentioned preciously, you should just call pack on the frame instead of set size. With your current code, this would cause the frame to be very small because of the preferred sizes of the components. If you want the buttons to have a bigger preferred size, you can set the font to a bigger font and/or use button.setMargins(new Insets(w,x,y,x)); to make the margins bigger. But it is preferred to pack the frame.
I would recommend using the Window Builder add-on if you’re using Eclipse. This tool will help you with many aspects of Swing. Learn by doing.
WindowBuilder Dowload Link
I'm developing a Java application for homework. This is my code
JLabel queryHandlerL = new JLabel("Create php to handle query results", JLabel.CENTER);
final JCheckBox queryHandlerCB = new JCheckBox();
JPanel checkBoxPanel = new JPanel(new FlowLayout());
checkBoxPanel.add(queryHandlerL);
checkBoxPanel.add(queryHandlerCB);
// Query Panel
// set image
picLabelQuery = new JLabel("",JLabel.LEFT);
picLabelQuery.setIcon(currentPicForm);
JPanel queryPanel = new JPanel();
final JButton queryButton = new JButton("Insert a query");
queryPanel.add(queryButton);
queryPanel.add(picLabelQuery);
// Panel create
final JButton createButton = new JButton("Create");
JPanel createPanel = new JPanel(new FlowLayout(FlowLayout.TRAILING));
createPanel.add(createButton);
JPanel finalPanel = new JPanel(new GridLayout(0, 1,5,2));
finalPanel.add(queryPanel);
finalPanel.add(checkBoxPanel);
finalPanel.add(createPanel);
finalPanel.setBorder(BorderFactory.createTitledBorder("SQL connection"));
setLayout(new GridBagLayout());
add(finalPanel);
I have a CardLayout and this is a Window inside this CardLayout. The last add(finalPanel) refers to the panel of the CardLayout.
This piece of code works but this is the result
How do I remove the space that is automatically created between the panels?
How do I remove the space that is automatically created between the panels?
Use a different layout manager for the panel. The GridLayout will always resize components to take up all the space in the panel.
Maybe you can use a BoxLayout or a GridBagLayout. You can also nest panels with different layout managers to get your desired effect.
Read the section from the Swing tutorial on Layout Managers for more information and examples.
You should pack() your surrounding panel or set the height to a desired value.
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
I'm trying to add a JList to a GUI, but am wondering how to position it? I want it to appear on the right hand side of the TextArea for data that will be sent to the GUI for selection.
Can anyone suggest how to do this? Here is the code (note: very new to Java and GUI's)
protected static void createAndShowGUI() {
GUI predict = new GUI();
JFrame frame = new JFrame("Phone V1.0");
frame.setContentPane(predict.createContentPane());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setMinimumSize(new Dimension(300, 400));
frame.setVisible(true); // Otherwise invisible window
}
private JPanel createContentPane() {
JPanel pane = new JPanel();
TextArea = new JTextArea(5, 10);
TextArea.setEditable(false);
TextArea.setLineWrap(true);
TextArea.setWrapStyleWord(true);
TextArea.setWrapStyleWord(true);
pane.setLayout(new BoxLayout(pane, BoxLayout.Y_AXIS));
//Adds the buttons from Top to Bottom
String[] items = {"dsfsdfd"};
list = new JList(items);
JScrollPane scrollingList = new JScrollPane(list);
int orient = list.getLayoutOrientation();
JPanel window = new JPanel();
pane.add(window);
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(5, 3));
JButton[] buttons = new JButton[] {
new JButton("Yes"),
new JButton(""),
new JButton("Clr"),
new JButton("1"),
new JButton("2abc"),
new JButton("3def"),
new JButton("4ghi"),
new JButton("5jkl"),
new JButton("6mno"),
new JButton("7pqrs"),
new JButton("8tuv"),
new JButton("9wxyz"),
new JButton("*+"),
new JButton("0_"),
new JButton("^#")
}; // Array Initialiser
for (int i = 0; i < buttons.length; i++) {
buttonPanel.add(buttons[i]);
buttons[i].addActionListener(this);
}
pane.add(TextArea);
pane.add(list);
pane.add(buttonPanel);
return pane;
}
Read the section from the Swing tutorial on Using Layout Mananger. There is no need to only use a single layout manager. You can nest layout managers to get the desired effect.
Wrap your TextArea and list in a new panel with a BorderLayout manager. Basically the BorderLayout manager lets you arrange components using north, south, east, west and center coordinates. The components at the center takes all available space as the parent container has more space available to it.
private JPanel createContentPane() {
JPanel pane = new JPanel(); //this is your main panel
JPanel textAreaPanel = new JPanel(new BorderLayout()); //the wrapper
//Some more code...
//Then at the end
//Make your TextArea take the center
textAreaPanel.add(TextArea, BorderLayout.CENTER);
//And the list to the east
textAreaPanel.add(list, BorderLayout.EAST);
pane.add(textAreaPanel);
pane.add(buttonPanel);
return pane;
}
The cool thing is that you can nest panels inside other panels, adding them different layout managers to get your desired layout.
On an unrelated note, try to follow Java naming conventions. Instead of JTextArea TextArea use JTextArea textArea. It makes it easier for you and people reading your code to understand it.
You could use a layout manager like Mig Layout for that kind of positionning.
(source: miglayout.com)
I could recommend you FormLayout. Before I found this layout I had a real pain with GridBagLayout. FormLayout is more powerful and much more convenient to learn and use and it is free. Give it a chance.
As others suggested, familiarize yourself with the concept of layout managers. There are several that come with the standard Swing API and several good 3rd party ones out there.
In addition, you will want to add the JList to a scroll pane (JScrollPane). You may want to consider adding it to a split pane (JSplitPane). And by consider I don't mean "do it because some guy on the net said so" I mean "do it if it makes sense for your end users".