I am trying to create a form in MigLayout. I want for any text fields to be labeled with a small JLabel preceding it, with the text field growing as space is available. I am successfully able to do this in the following code:
JFrame frame = new JFrame("Test");
JPanel panel = new JPanel(new MigLayout("", "fill", ""));
panel.add(new JLabel("Testing"));
panel.add(new JTextField(), "growx, pushx, wrap");
frame.setContentPane(panel);
frame.pack();
frame.setMinimumSize(new Dimension(400, 100));
frame.setPreferredSize(new Dimension(400, 100));
frame.setVisible(true);
The result looks like this, which is as expected (the JLabel is the minimum necessary size, the JTextField takes up the rest of the area):
However, if I put a JEditorPane below this and have it span the length of the whole window, the JLabel becomes larger and grows if I enlarge the window. The code change looks like this:
...
panel.add(new JTextField(), "growx, pushx, wrap");
//New line of code here:
panel.add(new JEditorPane(), "growx, pushx, span");
frame.setContentPane(panel);
...
Which causes a result that I do not expect (the JLabel has grown):
I've tried to fix this by adding MigLayout parameters for the JLabel, like "growx 0" and "shrink", but this doesn't seem to have any effect on the size of the label.
How can I prevent the JLabels from growing in a situation like this?
I figured it out! The problem is with the parameter on the JEditorPane:
panel.add(new JEditorPane(), "growx, pushx, span");
It turns out that when using span, growx, pushx is unnecessary (because it already grows in size) and when used in conjunction with this, it creates the effect shown above. My guess is that growx applies to all cells marked by span, but pushx only applies to the first cell.
So span makes the component take up multiple cells, they all were assigned the default growx weight, but pushx only makes the first cell grow.
So the proper way to fix the line is simply:
panel.add(new JEditorPane(), "span");
Related
I'm currently learning more about Java. I'm working on creating a GUI which is able to 'translate' amino-acid characters into their 3-letter codes.
I've got everything working as intended, but I'm still struggling to understand how I can resize the text inside my JScrollpane to not exceed the width. (Example in picture)
Do I just need to change some settings or maybe add '\n's to fit the JTextArea? Here's the code:
Thanks in advance!
private void createGUI() {
Container window = this.getContentPane();
window.setLayout(new FlowLayout());
panel = new JPanel();
inputField = new JTextField();
startButton = new JButton("Convert to 3-letter code");
display = new JTextPane();
scroll = new JScrollPane(display);
//CUSTOMIZE GUI OBJECTS
inputField.setPreferredSize(new Dimension(200, 20));
display.setPreferredSize(new Dimension(400, 300));
startButton.addActionListener(this);
//SETTING UP TEXTAREA
display.setEditable(false);
scroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
panel.setLayout(new BorderLayout());
panel.add(scroll, BorderLayout.CENTER);
//
window.add(inputField);
window.add(startButton);
window.add(panel);
}
Better use a JTextArea instead of a JScrollPane since the best that the JScrollPane can do is to dynamically resize (Dynamically Resize a JScrollPane?)
I changed JTextPane display to a JTextArea object and changed 'display.setLineWrap(true);'
This fixed the issue I was having with JTextPane.
To answer the question in the title: How do I resize the text inside my JScrollpane
Inside your scrollpane you have some JComponent. Either that JComponent is fully visible since it is smaller or equal to the JScrollpane's viewport. Or it is bigger, in which case the JScrollpane will start displaying scrollbars and the relevant part.
To resize the text you will just have to tell the JComponent inside the JScrollpane to display the text differently. Depending on the JComponent you use this method may vary. Here some examples:
In a JLabel and most other components, increase the font size (How to change the size of the font of a JLabel to take the maximum size)
In a JLabel, switch to a multiline label (Multiline text in JLabel)
In a JTextArea, turn on word wrapping and line wrapping
In a JEditorPane you can even use markup inside the document to use different font sizes at the same time
I am trying to add JButton components to a JPanel that I added to a JScrollPane. I want that they are vertically aligned. I already found the solution with the BoxLayout(panel, BoxLayout.Y_AXIS) in the panel, but after I did that the buttons had different widths.
I also would like to add some space between the buttons.
You need to use a different layout. Grid or GridBag is what you're looking for, although GridBag is overkill for something this simple:
panel.setLayout(new GridLayout(3, 1));
panel.add(new JButton("Button 1"));
panel.add(new JButton("Button 2"));
panel.add(new JButton("Button 3"));
Use a gridbaglayout , and apply vertical spacers at the button of each button. Also the text in button is not equal to the second and third button dats why it has a different size. So you can adjust it using the preferred size tool
i'm new here so go easy on me.
I've researched all the documentation on miglayout (which is pretty good btw) but I can't seem to properly display the grid that I want.
I need MigLayout() parameters to setup a grid as:
2 rows, being that the bottom row is split in half (or if you will: 1 top row adjacent to 2 bottom columns).
The top row will display the search textfield with an adjancent button.
The bottom left column will display 3 buttons stacked on top of each other.
The bottom right column will display an image label.
Here's some code to start with:
//main window panel setup
JPanel mainPanel = new JPanel();
mainWindow.add(mainPanel);
mainPanel.setLayout(new MigLayout(""));
//components insertion into panel (using MigLayout constraints)
mainPanel.add(searchText);
mainPanel.add(searchBtn, "wrap");
mainPanel.add(addBtn);
mainPanel.add(logoImage, "spany 3 , wrap");
mainPanel.add(randomBtn, "wrap");
mainPanel.add(getFileBtn);
(could not upload image)
With this code, Notice that the logo is being kept below the searchButton (i think it does this due to the layout being default-set as a grid) but I want it to fit adjacent-right to the buttons and below the textfield/searchButton.
First off I would say you are pretty close and you only need to play with both columns number and constraints (plus some missing component constraints). This can be done when you instantiate your layout:
MigLayout layout = new MigLayout("debug, fillx", "[][grow][]");
Note debug and fillx are layout constraints intended to enable debug feature and fill whole width, respectively. See this answer for more details.
Now you can think you need two columns, but you actually need three columns in order to expand the middle one, while first and last columns continue occupying the minimum possible width. That's what [][grow][] constraints mean.
Please consider this snippet:
MigLayout layout = new MigLayout("debug, fillx", "[][grow][]");
JPanel content = new JPanel(layout);
// First row
content.add(new JTextField(20), "spanx 2, growx"); // search text field
content.add(new JButton("Search"), "wrap");
// Second row
content.add(new JButton("Button # 1"), "growx");
content.add(new JLabel("Image here"), "span 2 3, grow, wrap"); // image label
content.add(new JButton("Button # 2"), "growx, wrap");
content.add(new JButton("Button # 3"), "growx, wrap");
This will produce something like this:
Please note that on horizontal resizing both search text field and image label will occupy the maximum available width, while search button and button's stack will occupy just the minimum possible width.
This is my first swing application. I'm trying to create an window and add a button. On clicking the button, it should display some value on the console. Everythign works fine, but the window is very small. I've specified 800*600, but then also the window size is small, that is its wrapping the button size only.
Here is my code snippet:
JFrame frame = new JFrame("My Application");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container contentPane = frame.getContentPane();
contentPane.setLayout(new BorderLayout());
contentPane.add(new MyClass(), BorderLayout.CENTER);
frame.setSize(800, 600);
frame.pack();
frame.setVisible(true);
Snippet from MyClass.java:
setLayout(new GridBagLayout());
JButton button = new JButton("Button");
button.addActionListener(this);
add(button);
How to make the window size as 800*600?
The pack() method should always be called on a GUI based on a JFrame, so leave that in. It reduces the GUI to the smallest size needed to display the components in it. But don't go calling setSize(Dimension) after that, before checking it is larger than the minimum size.
Remove frame.pack(); from your code.
More information:
http://docs.oracle.com/javase/tutorial/uiswing/components/frame.html
http://docs.oracle.com/javase/6/docs/api/java/awt/Window.html#pack%28%29
You are calling pack method. The api said: "It causes this Window to be sized to fit the preferred size and layouts of its subcomponents"
You haven't specified the preferred size. Try it doing this:
frame.setPreferredSize(new Dimension(800,600));
This is the screenshot.
This is my code to build and set the header.
private void buildHeader() {
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
panel.add(Box.createHorizontalStrut(10));
panel.add(new JLabel("Documents"));
panel.add(Box.createHorizontalGlue());
panel.add(new JButton("View"));
panel.add(new JButton("Print"));
panel.setBorder(BorderFactory.createLineBorder(new Color(210, 210, 210)));
panel.setBackground(new Color(245, 245, 245));
panel.setPreferredSize(new Dimension(panel.getPreferredSize().width, 51));
setColumnHeaderView(panel);
}
But, I am not able to make the header to take its whole space. It is leaving the space above vertical scroll bar.
So, How can I make this column header to take up its whole width.
But, I am not able to make the header to take its whole space. It is
leaving the space above vertical scroll bar.
by placing the JComponent to the Corner (there yould be an issue with Borders)
or by moving JPanel contians JButtons out of the JScrollPane
This is how headers work, they are designed to provide header information to the viewable area, so they have to be constrained to the width of the viewable area.
Instead of setting the column header view, try adding the panel to the NORTH position of the parent container and the scroll pane to the CENTER position.