I expect JPanel's setMinimumSize() to confine the resizing of JFrame too, but it doesn't.
The following is my example code:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
public class AutoResize{
public static void main(String[] args) {
JPanel leftPanel = new JPanel();
JPanel rightPanel = new JPanel();
leftPanel.setBackground(Color.RED);
rightPanel.setBackground(Color.BLUE);
leftPanel.setSize(500,400);
rightPanel.setSize(500,400);
Dimension d = new Dimension(450,300);
leftPanel.setMinimumSize(d);
rightPanel.setMinimumSize(d);
JSplitPane split;
split = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, leftPanel, rightPanel);
split.setDividerLocation(400);
JFrame frame = new JFrame();
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(split, BorderLayout.CENTER);
frame.setSize(1000, 800);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
If you resize JFrame into a very small size it produces this:
What I want is that JFrame couldn't be resized into a smaller region than JPanels' minimum size. Is there anyway to implement this?
All I need is adding frame.setMinimumSize(); , I feel dumb.
Thanks #Andrew Thompson #MadProgrammer and #user1803551
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Toolkit;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
public class AutoResize{
private final Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
private final double w = screenSize.getWidth();
private final double h = screenSize.getHeight();
private final Dimension d = new Dimension((int) w/3,(int) h/3);
public void run() {
JPanel leftPanel = new JPanel();
JPanel rightPanel = new JPanel();
leftPanel.setBackground(Color.RED);
rightPanel.setBackground(Color.BLUE);
//leftPanel.setSize(500,400);
//rightPanel.setSize(500,400);
leftPanel.setMinimumSize(d);
rightPanel.setMinimumSize(d);
JSplitPane split;
split = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, leftPanel, rightPanel);
split.setDividerLocation(400);
JFrame frame = new JFrame();
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(split, BorderLayout.CENTER);
frame.setSize((int) w,(int) h);
//frame.pack();
frame.setMinimumSize(new Dimension((int) w/3*2,(int) h/3*2));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public static void main(String[] args) {
AutoResize test = new AutoResize();
test.run();
}
}
Related
I am trying to make a program where I have two JPanels inside a JFrame, one of which contains a canvas. I am trying to find a way to get that canvas to be constantly updating so that I could create something like a game inside the canvas. I was wondering how I could make it so that the JPanel with the canvas in it is constantly refreshing so that you can see when something is changed in the canvas. Here is my code:
package main;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main
{
private JFrame frame;
private JPanel mainPanel;
private JPanel gamePanel;
private JPanel sidePanel;
public void setup()
{
frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(false);
frame.setVisible(true);
frame.setLocation(100, 50);
mainPanel = new JPanel();
Dimension d = new Dimension(800, 600);
mainPanel.setMaximumSize(d);
mainPanel.setMinimumSize(d);
mainPanel.setPreferredSize(d);
frame.add(mainPanel);
frame.pack();
mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.X_AXIS));
}
public void setupPanels()
{
gamePanel = new JPanel();
Dimension d = new Dimension(600, 600);
gamePanel.setMaximumSize(d);
gamePanel.setMinimumSize(d);
gamePanel.setPreferredSize(d);
gamePanel.setBackground(Color.RED);
mainPanel.add(gamePanel);
sidePanel = new JPanel();
d = new Dimension(600, 600);
sidePanel.setMaximumSize(d);
sidePanel.setMinimumSize(d);
sidePanel.setPreferredSize(d);
sidePanel.setBackground(Color.BLUE);
mainPanel.add(sidePanel);
}
public void setupGame()
{
GameArea game = new GameArea();
gamePanel.add(game);
game.start();
}
public static void main(String[] args)
{
Main main = new Main();
main.setup();
main.setupPanels();
main.setupGame();
}
How can I put a JOutlookBar into a JPanel?
Here is my code:
JFrame frame = new JFrame("JOutlookBar Test");
JOutlookBar outlookBar = new JOutlookBar();
outlookBar.addBar("One", getDummyPanel1("one"));
outlookBar.addBar("Two", getDummyPanel2("Two"));
outlookBar.addBar("Three", getDummyPanel3("Three"));
outlookBar.addBar("Four", getDummyPanel4("Four"));
outlookBar.addBar("Five", getDummyPanel5("Five"));
outlookBar.setVisibleBar(0);
frame.getContentPane().add(outlookBar);
frame.setSize(800, 600);
Adding frame.setVisible(true); allowed me to view your code working correctly.
Below is full working example of the code you provided, copy and paste it into a file named Library.java and it'll be grand!
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
public class Library {
public static void main(String[] args) {
JFrame frame = new JFrame("JOutlookBar Test");
JPanel left = new JPanel();
JPanel center = new JPanel();
JOutlookBar outlookBar = new JOutlookBar();
outlookBar.addBar("One", getDummyPanel1("one"));
outlookBar.addBar("Two", getDummyPanel1("Two"));
outlookBar.addBar("Three", getDummyPanel1("Three"));
outlookBar.addBar("Four", getDummyPanel1("Four"));
outlookBar.addBar("Five", getDummyPanel1("Five"));
outlookBar.setVisibleBar(0);
//Add outlookbar to left panel
left.add(outlookBar);
//Add some content to center panel...
center.add(new JTextArea());
//Add left and center panels with layout styles
frame.setLayout(new BorderLayout());
frame.add(left, BorderLayout.WEST);
frame.add(center, BorderLayout.CENTER);
frame.setSize(800, 600);
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
//Show JFrame
frame.setVisible(true);
}
public static JPanel getDummyPanel1(String num) {
JPanel panel = new JPanel();
panel.add(new JButton("num"));
return panel;
}
}
I'm making a small game and at the beginning i want to have JCheckBox for choosing the language(after that they are few more of them for setting the game) and above that a jlabel with picture with name of the game OR draw an image there, the problem is that i dont know any other way how to center the panel with checkboxes then to use GridBagLayout and when i use this, i cannot draw anything to the frame, id like to also remove those grey lines around the checkboxes if its possible, appreciate any help, thanks.
This is my second question here and i cant add images yet so here is a link to the picture :
here is code for the frame
private GamePlan plan;
private JFrame frame;
private String language;
private JPanel panel;
private JCheckBox englishBox;
private JCheckBox germanBox;
public Settings(GamePlan plan){
this.plan = plan;
frame = new JFrame();
frame.setSize(600, 500);
frame.setLocation(200, 200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridBagLayout());
frame.setResizable(false);
frame.setVisible(true);
panel = new JPanel(new GridLayout(2, 1));
englishBox = new JCheckBox("English", false);
germanBox = new JCheckBox("German", false);
englishBox.addActionListener(new EnglishLanguage());
germanBox.addActionListener(new GermanLanguage());
panel.add(englishBox);
panel.add(germanBox);
englishBox.setOpaque(false);
germanBox.setOpaque(false);
panel.setOpaque(false);
frame.add(panel);
frame.getContentPane().setBackground(new Color(216,252,202));
}
" the problem is that i dont know any other way how to center the panel with checkboxes then to use GridBagLayout and when i use this, i cannot draw anything to the frame"
I can't really tell what you're doing wrong without a complete example. I don't even see where you're trying to add the image. But don't try and draw on the frame. Draw on a JPanel instead.
Here is an example you may be able to gain some insight from.
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridBagLayout;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.TitledBorder;
public class ImageByDrawing {
public ImageByDrawing() {
ImagePanel imagePanel = new ImagePanel();
imagePanel.setBorder(new TitledBorder("Drawn Image onto JPanel"));
JCheckBox germanBox = new JCheckBox("German");
germanBox.setOpaque(false);
JCheckBox englishBox = new JCheckBox("English");
englishBox.setOpaque(false);
JPanel boxPanel = new JPanel();
boxPanel.setBorder(new TitledBorder("JPanel with default FlowLayout"));
boxPanel.setOpaque(false);
boxPanel.add(germanBox);
boxPanel.add(englishBox);
JPanel centerPanel = new JPanel(new BorderLayout());
centerPanel.add(imagePanel, BorderLayout.CENTER);
centerPanel.add(boxPanel, BorderLayout.SOUTH);
centerPanel.setBorder(new TitledBorder("JPanel with BorderLayout"));
centerPanel.setOpaque(false);
JPanel mainPanel = new JPanel(new GridBagLayout());
mainPanel.add(centerPanel);
mainPanel.setBorder(new TitledBorder("JPanel with GridBagLayout"));
mainPanel.setBackground(new Color(216,252,202));
JFrame frame = new JFrame();
frame.add(mainPanel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(600, 600);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public class ImagePanel extends JPanel {
BufferedImage img;
int dWidth;
int dHeight;
public ImagePanel() {
try {
img = ImageIO.read(getClass().getResource("/resources/stackblack.jpg"));
dWidth = img.getWidth();
dHeight = img.getHeight();
} catch (IOException ex) {
Logger.getLogger(ImageByDrawing.class.getName()).log(Level.SEVERE, null, ex);
}
}
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(img, 0, 0, img.getWidth(), img.getHeight(), this);
}
#Override
public Dimension getPreferredSize() {
return (img == null) ? new Dimension(300, 300) : new Dimension(dWidth, dHeight);
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run() {
new ImageByDrawing();
}
});
}
}
Also I don't know why you prefer to draw the image. The same can be easily done with a JLabel and ImageIcon
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridBagLayout;
import javax.swing.ImageIcon;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.TitledBorder;
public class ImageByDrawing {
public ImageByDrawing() {
ImageIcon icon = new ImageIcon(getClass().getResource("/resources/stackblack.jpg"));
JLabel label = new JLabel(icon);
label.setBorder(new TitledBorder("JLabel with ImageIcon"));
JCheckBox germanBox = new JCheckBox("German");
germanBox.setOpaque(false);
JCheckBox englishBox = new JCheckBox("English");
englishBox.setOpaque(false);
JPanel boxPanel = new JPanel();
boxPanel.setBorder(new TitledBorder("JPanel with default FlowLayout"));
boxPanel.setOpaque(false);
boxPanel.add(germanBox);
boxPanel.add(englishBox);
JPanel centerPanel = new JPanel(new BorderLayout());
centerPanel.add(label, BorderLayout.CENTER);
centerPanel.add(boxPanel, BorderLayout.SOUTH);
centerPanel.setBorder(new TitledBorder("JPanel with BorderLayout"));
centerPanel.setOpaque(false);
JPanel mainPanel = new JPanel(new GridBagLayout());
mainPanel.add(centerPanel);
mainPanel.setBorder(new TitledBorder("JPanel with GridBagLayout"));
mainPanel.setBackground(new Color(216, 252, 202));
JFrame frame = new JFrame();
frame.add(mainPanel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(600, 600);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new ImageByDrawing();
}
});
}
}
The last part of your question, as #Jere pointed out you can use setFocusPainted for the check box germanBox.setFocusPainted(false);
Hi, I am making a program that has a JSplitPane and its background is transparent so I add two panels with a JScrollPane on the JSplitPane.. when I add the contents in the panel it doesn't appear.
This is the code that I was using:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JViewport;
import javax.swing.UIManager;
public class sample {
JFrame mainFrame;
JPanel mainPanel;
JPanel splitPaneLeftPanel;
JPanel splitPaneRightPanel;
JSplitPane splitPane;
JScrollPane rightPanelScroll;
JScrollPane leftPanelScroll;
JViewport viewport;
sample(){
Frame();
SplitPaneAndContent();
mainFrame.setVisible(true);
}
public void Frame(){
mainFrame = new JFrame();
mainFrame.setTitle("Sample");
mainFrame.setLayout(new BorderLayout());
mainFrame.setSize(1024,720);
mainFrame.setMaximumSize(new Dimension(1366,768));
mainFrame.setMinimumSize(new Dimension(800,600));
mainFrame.setResizable(true);
mainFrame.setLocationRelativeTo(null);
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void SplitPaneAndContent(){
mainPanel = new JPanel(new BorderLayout());
splitPaneLeftPanel = new JPanel(new BorderLayout());
splitPaneRightPanel = new JPanel(new BorderLayout());
mainPanel.setBackground(Color.blue);
JScrollPane rightPanelScroll = new JScrollPane(splitPaneRightPanel);
JScrollPane LeftPanelScroll = new JScrollPane(splitPaneLeftPanel);
viewport = new JViewport();
rightPanelScroll.setViewport(viewport);
rightPanelScroll.getViewport().setOpaque(false);
JLabel Text = new JLabel("SAMPLE");
Text.setBackground(Color.red);
splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,LeftPanelScroll,rightPanelScroll);
splitPane.setDividerLocation(300);
splitPaneLeftPanel.setOpaque(false);
splitPaneRightPanel.setOpaque(false);
rightPanelScroll.setOpaque(false);
splitPane.setOpaque(false);
splitPaneRightPanel.add(Text, BorderLayout.CENTER);
mainPanel.add(splitPane, BorderLayout.CENTER);
mainFrame.add(mainPanel, BorderLayout.CENTER);
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
new sample();
}
catch (Exception e) {
System.out.println(e);
}
}
}
I have JPanel with a border, the problem is that when I add the panel on the JFrame it takes the panel size although I set the preferred size for the panel using setPreferredSize. The layout of the frame is 'BoxLayout' and here's the code:
public class ActionForm extends JFrame {
JPanel namePanel;
JPanel descPanel;
JLabel actionName;
JLabel nameLabel;
JTextField nameTextField, descTextField;
FlowLayout toolBarLayout = new FlowLayout();
public ActionForm() {
this.setLayout(new BoxLayout(this.getContentPane(), BoxLayout.Y_AXIS));
TitledBorder nameBorder= BorderFactory.createTitledBorder(
"Change Description");
nameBorder.setTitleJustification(TitledBorder.LEFT);
namePanel = new JPanel(toolBarLayout);
namePanel.setPreferredSize(new Dimension(150, 150));
nameLabel = new JLabel("ButtonName");
nameTextField = new JTextField("Action's Name", 50);
namePanel.add(nameLabel);
namePanel.add(nameTextField);
namePanel.setBorder(nameBorder);
namePanel.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
this.add(namePanel);
}
public static void main(String[] args) {
ActionForm form = new ActionForm();
form.setVisible(true);
form.setSize(970, 500);
form.setResizable(false);
}
}
Why the size of the panel doesn't change?
BoxLayout accepting Min/Max/preferredSize that came from JComponents layed by this LayoutManager
(I'm don't want to comment something, because my answer will be so long) please to compare your code with this code example, there are implemented all good (required and important) Swing rulles
for example
import java.awt.ComponentOrientation;
import java.awt.Dimension;
import java.awt.FlowLayout;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.border.TitledBorder;
public class ActionForm {
private static final long serialVersionUID = 1L;
private JFrame frame;
private JPanel namePanel;
private JLabel nameLabel;
private JTextField nameTextField;
private FlowLayout toolBarLayout = new FlowLayout();
public ActionForm() {
TitledBorder nameBorder = BorderFactory.createTitledBorder(
"Change Description");
nameBorder.setTitleJustification(TitledBorder.LEFT);
namePanel = new JPanel(toolBarLayout);
namePanel.setPreferredSize(new Dimension(150, 150));// hardCoded sizing
namePanel.setMaximumSize(new Dimension(250, 150)); // hardCoded sizing
namePanel.setMinimumSize(new Dimension(150, 150)); // hardCoded sizing
nameLabel = new JLabel("ButtonName");
nameTextField = new JTextField("Action's Name", 10);
namePanel.add(nameLabel);
namePanel.add(nameTextField);
namePanel.setBorder(nameBorder);
namePanel.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
frame = new JFrame("Mix / Max / PreferredSize for BoxLayout");
frame.getContentPane().setLayout(new BoxLayout(frame.getContentPane(),
BoxLayout.Y_AXIS)); // otherwise nice exceptions java.awt.AWTError:
// BoxLayout can't be shared
frame.add(namePanel);
frame.setPreferredSize(new Dimension(970, 500));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(false);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
ActionForm form = new ActionForm();
}
});
}
}