I have a jsplitPane and 2 component. I want to not let the user click the divider to maximize the top component.
Here is my code.
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JSplitPane;
public class MovingJSplitPaneDivider {
public static void main(String[] a) {
JFrame horizontalFrame = new JFrame();
horizontalFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JComponent topButton = new JButton("Left");
JComponent bottomButton = new JButton("Right");
final JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
splitPane.setTopComponent(topButton);
splitPane.setBottomComponent(bottomButton);
horizontalFrame.add(splitPane, BorderLayout.CENTER);
horizontalFrame.setSize(150, 150);
horizontalFrame.setVisible(true);
splitPane.setDividerLocation(0.5);
}
}
What I want exactly is that to block the user when he wants to move down the divider.
Related
Can't figure out why this wont work, I get a blank panel added to my gridbag panel.
I added a JLabel("test") between the frames I'm trying to add just to see that something IS getting added, it just isn't visible?
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.Label;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
public class Workspace extends JTabbedPane {
static JFrame frame = new JFrame();
private JPanel grid;
private String text = new String("testing.");
Workspace() {
this.addTab("title", growPanel());
}
public static void main(String[] args) throws IOException {
createAndShowGUI();
}
private JPanel growPanel() {
JPanel gp = new JPanel(false);
gp.setPreferredSize(new Dimension(800,600));
//Add a button that adds my frame
JButton addComponentBtn = new JButton("Add Component");
addComponentBtn.addActionListener(e-> {
try {
addComponent();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
});
gp.add(addComponentBtn, BorderLayout.PAGE_START);
grid = new JPanel(new GridLayout(0, 2, 10, 10)); //any number of rows, 2 columns, H and V gap
JScrollPane sp = new JScrollPane(grid);
sp.setPreferredSize(new Dimension(800,600));
gp.add(sp, BorderLayout.CENTER);
this.setVisible(true);
return gp;
}
void addComponent() throws IOException {
System.out.println("adding");
grid.add(new JLabel("test"));
grid.add(new intf());
this.repaint();
frame.pack();
}
private static void createAndShowGUI() throws IOException {
//Create and set up the window.
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Add content to the window.
frame.add(new Workspace(), BorderLayout.CENTER);
//Display the window.
frame.pack();
frame.setVisible(true);
}
}
And the intf.java class for the JInternalFrame:
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class intf extends JInternalFrame {
public intf () {
super("Document",
true, //resizable
true, //closable
true, //maximizable
true);//iconifiable
JPanel jp = new JPanel();
JLabel jl = new JLabel("Hi I'm a label");
jp.add(jl);
this.add(jp);
this.pack();
this.repaint();
}
}
Edit:
The JPanel is used to hold the Layout, I don't think I can assign one to the TabbedPane?
Users will load in images which will appear on the left side of the GridLayout (I will upgrade this to a GridBag). After selecting regions on said images, graphs will appear on the right side. This is also why we use a scrollPane so that there is no limit to the number of images loaded. The TabbedPane will be used to split the load if a user loads in too many images (this is all not in the demo code shown here and not relevant to the problem).
The code I posted is for testing why the JInternalFrame doesn't show, so it only shows what is relevant to getting that to work.
Thank you all for your input.
It turned out to be a simple mistake of not having a necessary .setVisible(true)
Under the addComponent() method, the problem is solved when I replace
grid.add(new intf());
with
intf a = new intf();
a.setVisible(true);
grid.add(a);
Below is a Java program which does not work properly. I wanted the JTextfield to go to the bottom, and be 50x50, but it is not working. I was wondering if I could get some help.
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
public class Main {
public static JTextField intext = new JTextField();
public static JPanel panel = new JPanel();
public static boolean running = true;
public static String runtext;
public static String word = "HELLO";
public static String guesses = "";
public static void main(String[] args) {
intext.setBounds(5,667,50,50);
panel.add(intext);
JFrame frame = new JFrame("Hangman");
frame.setBounds(10,10,600,750);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(panel);
frame.setResizable(false);
frame.setVisible(true);
I inferred that when using the .setBounds() method the JTextfield would go where it was needed, though it remains at the top, and extremely thin.
Try editing your code this way:-
panel.setLayout(null); // setting layout for panel
panel.setBounds(0,0,600,650); // setting bounds for panel with respect to frame
intext.setBounds(5,557,50,50); //setting bounds for textfield with respect to panel
panel.add(intext);
JFrame frame= new JFrame("Hangman");
frame.setBounds(10,10,600,750);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(panel);
frame.setResizable(false);
frame.setLayout(null); // setting layout for frame
frame.setVisible(true);
Make sure to include layouts for your components and set the bounds for your JPanel's and JTextField's properly.
I want to add a JPanel to a JLayeredPane when the user clicks enter, but the JPanel is not showing up.
If i add the JPanel to the JLayeredPane in the JFrame's constructor, everything is working correctly.
What do i have to do, that the JPanel is showing up, when the user clicks 'enter'?
Here's the code:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
public class Test extends javax.swing.JFrame {
public static void main(String[] args) {
Test test = new Test();
test.setSize(800, 500);
test.setVisible(true);
}
public Test() {
setLayout(new BorderLayout());
//LayeredPane on JFrame
JLayeredPane jlp = new JLayeredPane();
jlp.setLayout(new BorderLayout());
this.add(jlp, BorderLayout.CENTER);
//Adds a JPanel to the North
JPanel jPNorth = new JPanel();
jPNorth.setBackground(Color.RED);
jlp.add(jPNorth, BorderLayout.NORTH, JLayeredPane.DEFAULT_LAYER);
//Adds Enter Keybinding
InputMap key_input_map = jlp.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
ActionMap key_action_map = jlp.getActionMap();
key_input_map.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0, false), "add_jpanel");
key_action_map.put("add_jpanel", new AbstractAction() {
#Override
public void actionPerformed(ActionEvent e) {
JPanel jPSouth = new JPanel();
jPSouth.setBackground(Color.YELLOW);
jlp.add(jPSouth, BorderLayout.SOUTH, JLayeredPane.DEFAULT_LAYER);
System.out.println("enter");
}
});
}
}
Thanks,
Jumagoro
You did everything correct, the solution is very simple. When you dynamically add swing Components to each other, you must to use component.repaint(); and component.revalidate(); to redraw the elements. Add the two commands after everything is added. So your actionPerformed method should be changed to the following:
public void actionPerformed(ActionEvent e) {
JPanel jPSouth = new JPanel();
jPSouth.setBackground(Color.YELLOW);
jlp.add(jPSouth, BorderLayout.SOUTH, JLayeredPane.DEFAULT_LAYER);
//Need these to here!
jlp.repaint();
jlp.revalidate();
System.out.println("enter");
}
I am actually a beginner in Java Programming (on eclipse and without netbeans), and want to clear a JLabel presents in a JFrame by clicking a JButton without removing the JButton present at the top of this frame.
import java.awt.Color;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.BorderLayout;
import java.awt.event.KeyEvent;
import javax.swing.BoundedRangeModel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class ButtonTest extends JPanel implements ActionListener {
private JButton ouvrirButton = new JButton("Ouvrir");
private JButton retirerButton = new JButton("Retirer");
private JButton ajouterButton = new JButton("Ajouter");
public ButtonTest() {
add(ouvrirButton);
add(retirerButton);
add(ajouterButton);
ouvrirButton.addActionListener(this);
retirerButton.addActionListener(this);
ajouterButton.addActionListener(this);}
public void actionPerformed(ActionEvent evt) {
Object source = evt.getSource();
Color color = getBackground();
// ACTION Button "OUVRIR"
// I WANT TO REMOVE THIS JLABEL TEXT WHEN I CLICK FOR EXEMPLE ON
// OR "RETIRER"
if (source == ouvrirButton)
{
color = Color.yellow;
JLabel lab1 = new JLabel("Text", JLabel.LEFT);
setLayout(new FlowLayout());
add(lab1 = new JLabel("INVENTAIRE : "));
lab1.setBounds(20, 15, 500, 100);
}
else if (source == retirerButton)
color = Color.red;
else if (source == ajouterButton)
color = Color.red;
setBackground(color);
repaint();
}
// The main
public static void main(String[] args) {
// NOM DE LA FENETRE
JFrame frame = new JFrame("Programme ");
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
Container contentPane = frame.getContentPane();
contentPane.add(new ButtonTest());
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(1300, 700);
frame.setVisible(true);
}
}
I tried .setText("") but it doesn't work... Please help me !
I tried .setText("") but it doesn't work...
Yes it does. The problem is you create the label in the ActionListener so that label reference is only valid in the block of code that created it.
You need to create the label as an instance variable (the way you did for all you buttons) and add the label to the fame at the same time you add the buttons to the panel.
Then you will be able to access the label in the ActionListener and change the text.
The search bar is 'search_bar', I'm trying to move it to the left hand side of the box with 'j_panel.add(search_bar, BorderLayout.WEST);' but it doesn't move from the middle. Any ideas on how to do this? Thanks
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SpringLayout;
public class Main {
public static void main(String args[]) {
JFrame jfrm = new JFrame("Test");
jfrm.setSize(1024, 600);
jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jfrm.setResizable(false);
JTextField search_bar = new JTextField("Search...", 25);
search_bar.setPreferredSize(new Dimension(1,35));
JTextArea body = new JTextArea(32,83);
body.setPreferredSize(new Dimension());
body.setEditable(false);
JButton search_button = new JButton("Search");
JPanel j_panel = new JPanel();
j_panel.setLayout(new FlowLayout());
j_panel.add(search_bar, BorderLayout.WEST);
j_panel.add(search_button, null);
j_panel.add(body, BorderLayout.EAST);
j_panel.setBackground(Color.gray);
search_button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
final String text = search_bar.getText();
body.setText(text);
}
});
jfrm.setContentPane(j_panel);
jfrm.setVisible(true);
}
}
j_panel.setLayout(new FlowLayout());
j_panel.add(search_bar, BorderLayout.WEST);
BorderLayout.WEST is not applicable for FlowLayout. If you want to use a BorderLayout, use one instead of FlowLayout.
You cannot position components exactly the way you'd like when using FlowLayout.
By using BorderLayout you are bound to have only 5 components, because BorderLayout can handle 5 components max.