I have a JDialog which contains JPanel and other elements like JTextField. I want to move JDialog from one location to another after it is loaded on screen. When I try to use jdialog.setLocation(), I am not able to move JDialog and also all other components added to it becomes invisible.
Can anyone tell me what might be wrong with my approach?
Regarding Gilbert's assertion that a dialog can't be moved after being set visible, please run this:
import java.awt.Component;
import java.awt.Dialog.ModalityType;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class MovingDialog {
private static void createAndShowGui() {
JPanel panel = new JPanel();
panel.add(new JButton(new ShowMovingDialogAction()));
JFrame frame = new JFrame("MovingDialog");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(panel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
class ShowMovingDialogAction extends AbstractAction {
private JPanel panel = new JPanel();
public ShowMovingDialogAction() {
super("Show Moving Dialog");
panel.add(new JLabel("label"));
panel.add(new JTextField("TextField", 10));
panel.add(new JButton("Button"));
}
#Override
public void actionPerformed(ActionEvent e) {
JFrame owner = (JFrame) SwingUtilities.getWindowAncestor((Component) e
.getSource());
final JDialog dialog = new JDialog(owner, "Dialog",
ModalityType.APPLICATION_MODAL);
dialog.getContentPane().add(panel);
dialog.pack();
dialog.setLocation(0, 0);
int delay = 20;
new Timer(delay , new ActionListener() {
int x = 0;
int y = 0;
Dimension scrn = Toolkit.getDefaultToolkit().getScreenSize();
#Override
public void actionPerformed(ActionEvent e) {
int maxX = scrn.width - dialog.getWidth();
int maxY = scrn.height - dialog.getHeight();
if (x < maxX && y < maxY) {
x++;
y++;
dialog.setLocation(x, y);
} else {
((Timer)e.getSource()).stop();
}
}
}).start();
dialog.setVisible(true);
}
}
Note that the animation Swing Timer must be started before calling setVisible(true). Perhaps that is what Gilbert was referring to.
If you try to do animation then you will have to initialize and start a new thread and do it there. The code inside the run() method of the thread should check if the dialog is visible and call dialog.setLocation() with modified values on each iteration.
Related
I'm working on a simple GUI. On Button press i want to increase/decrease a variable and update the corresponding JLabel.
class JFrameSetUp
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JFrameSetUp extends JFrame implements ActionListener {
private int RecHeight = 0;
private int RecWidth = 0;
//Here Buttons
JButton HeightIncrease = new JButton("+");
JButton HeightDecrease = new JButton("-");
JLabel height = new JLabel(Integer.toString(RecHeight));
JLabel width = new JLabel(Integer.toString(RecWidth));
GridLayout gridLayout = new GridLayout(2, 4);
public JFrameSetUp(){
}
public void addComponentsToPane(final Container pane){
//Create GridPanel and set Layout
JPanel grid = new JPanel();
grid.setLayout(gridLayout);
//Create buttondrawPanel and set Layout
JPanel buttondraw = new JPanel();
buttondraw.setLayout(new GridLayout(2, 0));
//Adding Components to GridPanel
//Adding Layouts to pane
pane.add(grid, BorderLayout.NORTH);
pane.add(new JSeparator(), BorderLayout.CENTER);
pane.add(buttondraw, BorderLayout.SOUTH);
}
#Override
public void actionPerformed(ActionEvent e) {
//Setting up ActionListener to Buttons
if (e.getSource() == this.HeightDecrease) {
RecHeight -= 1;
height.setText(Integer.toString(RecHeight));
} else if (e.getSource() == this.HeightIncrease) {
RecHeight += 1;
height.setText(Integer.toString(RecHeight));
}
}
}
Class with MainMethod
import javax.swing.JFrame;
public class Program {
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
private static void createAndShowGUI() {
//Create and set up the window.
JFrameSetUp frame = new JFrameSetUp();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane.
frame.addComponentsToPane(frame.getContentPane());
//Display the window.
frame.pack();
frame.setVisible(true);
}
}
I'm aware, that's kind a newbish question. I think I'm wrong with my Code Structure. Any help is appreciated.
Thanks in advance.
You never register any ActionListeners to the buttons...
HeightIncrease.addActionListener(this);
HeightDecrease.addActionListener(this);
You also never add the buttons to the GUI
buttondraw.add(HeightIncrease);
buttondraw.add(HeightDecrease);
You also never add the labels to the GUI either...
grid.add(height);
grid.add(width);
I reworked the code, because your example was messing with my mind, hope you don't mind...
It's conceptually the same idea, just done slightly more efficently
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSeparator;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private int recHeight = 0;
private int recWidth = 0;
//Here Buttons
JButton heightIncrease = new JButton("+");
JButton heightDecrease = new JButton("-");
JLabel height = new JLabel(Integer.toString(recHeight));
JLabel width = new JLabel(Integer.toString(recWidth));
GridLayout gridLayout = new GridLayout(2, 4);
public TestPane() {
setLayout(new BorderLayout());
//Create GridPanel and set Layout
JPanel grid = new JPanel();
grid.setLayout(gridLayout);
grid.add(height);
grid.add(width);
//Create buttondrawPanel and set Layout
JPanel buttondraw = new JPanel();
buttondraw.setLayout(new GridLayout(2, 0));
heightIncrease.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
recHeight += 1;
height.setText(Integer.toString(recHeight));
}
});
heightDecrease.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
recHeight -= 1;
height.setText(Integer.toString(recHeight));
}
});
buttondraw.add(heightIncrease);
buttondraw.add(heightDecrease);
//Adding Components to GridPanel
//Adding Layouts to pane
add(grid, BorderLayout.NORTH);
add(new JSeparator(), BorderLayout.CENTER);
add(buttondraw, BorderLayout.SOUTH);
}
}
}
I would encourage you to spend some time having a look at How to Use Buttons, Check Boxes, and Radio Buttons and How to Write an Action Listeners for more details
After changing the value call
frame.repaint();
Good to see you learning Java! A few things I should point out.
Firstly, your variable names are good, but they don't follow the Java naming convention. Even though it seems small, it's just good practice to follow.
Of course, your actual problem; the action listener you've implemented is on the JFrame. (See how you extend JFrame and implement ActionListener?) This ActionListener should be on the button. You'll can do this a few ways.
Method 1: By adding it inline with your code
JButton heightButton = new JButton("Increase Height");
heightButton.addActionListener(new ActionListener(){
#Override
public void run(){
//run method here
}
});
Method 2: Create a class which implements ActionListener
class ButtonListener implements ActionListener{
#Override
public void run(){
//actionListener code here
}
}
And then instantiate an object of this type and add it directly to your code.
ActionListner buttonListener = new ButtonListener(); //or ButtonListener buttonListener = new ButtonListener();
JButton heightButton = new JButton("Increase Height");
heightButton.addActionListener(buttonListener);
Of course, as in MadProgrammers answer, don't forget to add the labels and such to your JFrame or JPanel. Good luck learning Java!
I bet that your program just shows nothing, isn't it? That's because in addComponentsToPane method, you didn't add any component but empty JPanels. After the comment //Adding Components to GridPanel, you should:
buttondraw.add(HeightIncrease);
buttondraw.add(HeightDecrease);
grid.add(height);
grid.add(width);
Then, to listen to button event, you should also add :
HeightIncrease.addActionListener(this);
HeightDecrease.addActionListener(this);
"this" is because your frame JFrameSetUp implements ActionListener, so when either bootton is clicked the method actionPerformed is invoked.
As JLabel.setText method will repaint itself and consequently its component hierarchi is repainted as well, you haven't to do anything othr.
I'm trying to have a JPanel of varying size (potentially much wider than the standard screen) inside of a JScrollPanel. Currently it works out great, and I have configured the scrollbars to work fine manually, however I would like the JPanel to "scroll" constantly to the left, so that over time the whole thing is displayed. All of the answers I found are specific to JTextArea and use Carets, or use rectToVisible. Neither of these will work because I'm trying to scroll internally to a single JPanel.
I've included what I believe to be all of the relevant code below.
center is the JPanel (of which Grid is a subclass, used to paint specifically a grid with some specific cells colored) with a BorderLayout that I would like to autoscroll.
public GuiViewFrame(Song playMe) {
String[][] songArray = playMe.to2DArray();
this.displayPanel = new ConcreteGuiViewPanel(playMe);
main = new JPanel();
main.setLayout(new BorderLayout());
displayPanel.setLayout(new BorderLayout());
center = new Grid(playMe);
labels = new Labels(playMe);
horiz = new Horiz(playMe);
center.setPreferredSize(new Dimension(10 * songArray.length, 10 * songArray[0].length));
horiz.setPreferredSize(new Dimension(10 * songArray.length, 10));
horiz.setVisible(true);
main.add(center, BorderLayout.CENTER);
main.add(horiz, BorderLayout.NORTH);
scroll = new JScrollPane(main,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
add(scroll, BorderLayout.CENTER);
labels.setPreferredSize(new Dimension(20, 10 * songArray[0].length));
labels.setVisible(true);
add(labels, BorderLayout.WEST);
JScrollBar horiz = scroll.getHorizontalScrollBar();
InputMap im = horiz.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
im.put(KeyStroke.getKeyStroke("RIGHT"), "positiveUnitIncrement");
im.put(KeyStroke.getKeyStroke("LEFT"), "negativeUnitIncrement");
im.put(KeyStroke.getKeyStroke("HOME"), "minScroll");
im.put(KeyStroke.getKeyStroke("END"), "maxScroll");
this.setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
this.pack();
}
The project as a whole is to generate a view for playing music that combines MIDI and a GUI, but right now once MIDI plays enough of the song, the relevant notes are off screen. I would like to scroll at a rate to keep pace with MIDI.
You can set the value of the horizontal scrollbar to control what is currently visible:
JScrollBar horizontal = scroll.getHorizontalScrollBar();
horizontal.setValue( horizontal.getValue() + ??? );
You would need to use a Swing Timer to schedule the scrolling at an appropriate interval.
Simple example of using a Timer to scroll text:
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class TimerTest extends JPanel implements ActionListener
{
JLabel timeLabel;
JLabel scrollLabel;
public TimerTest()
{
setLayout( new BorderLayout() );
timeLabel = new JLabel( new Date().toString() );
add(timeLabel, BorderLayout.NORTH);
scrollLabel = new JLabel( "Some continuously scrolling text!! " );
add(scrollLabel, BorderLayout.SOUTH);
int time = 1000;
javax.swing.Timer timer = new javax.swing.Timer(time, this);
timer.setInitialDelay(1);
timer.start();
}
public void actionPerformed(ActionEvent e)
{
timeLabel.setText( new Date().toString() );
String oldText = scrollLabel.getText();
// Scroll right to left
String newText = oldText.substring(1) + oldText.substring(0, 1);
// Scroll left to right
// int length = oldText.length();
// String newText = oldText.substring(length-1, length)
// + oldText.substring(0, length-1);
scrollLabel.setText( newText );
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("SSCCE");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add( new TimerTest() );
frame.setLocationByPlatform( true );
frame.pack();
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
}
}
One possible solution might be to take advantage of JComponent#scrollRectToVisible and a Swing Timer
For example...
import java.awt.Container;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JViewport;
import javax.swing.Scrollable;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class ScrollTest {
public static void main(String[] args) {
new ScrollTest();
}
public ScrollTest() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new JScrollPane(new TestPane()));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel implements Scrollable {
public TestPane() {
Timer timer = new Timer(40, new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
JViewport viewport = (JViewport) getParent();
Rectangle viewRect = viewport.getViewRect();
if (viewRect.x + viewRect.width < getWidth()) {
viewRect.x += 2;
scrollRectToVisible(viewRect);
} else {
((Timer)e.getSource()).stop();
}
}
});
timer.start();
}
#Override
public Dimension getPreferredSize() {
return new Dimension(1000, 200);
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
g2d.drawLine(0, 0, getWidth(), getHeight());
g2d.dispose();
}
#Override
public Dimension getPreferredScrollableViewportSize() {
return new Dimension(200, 200);
}
#Override
public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
return 64;
}
#Override
public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
return 64;
}
#Override
public boolean getScrollableTracksViewportWidth() {
return getPreferredSize().width <= getParent().getSize().width;
}
#Override
public boolean getScrollableTracksViewportHeight() {
return getPreferredSize().height <= getParent().getSize().height;
}
}
}
I am trying to have a dialog showing a progress bar with a label. I have set my label to be center aligned with JLabel.Center and the use of a box.
Initially, the label is shown as centered, which is what I am looking for. However, when changing the label's text (by using the code "creatingQueriesLabel.setText(text)", the label is now displayed as left aligned.
Any help will be greatly appreciated! Here is my code.
JFrame frame = new JFrame("Creating queries ...");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Box box = Box.createVerticalBox();
JPanel panel = new JPanel();
panel.setLayout(null);
creatingQueriesLabel = new JLabel("Initializing ... ");
creatingQueriesLabel.setSize(480, 160);
creatingQueriesLabel.setLocation(10, 10);
creatingQueriesLabel.setAlignmentX(JLabel.CENTER_ALIGNMENT);
box.setLocation(0, 10);
box.setSize(480, 160);
box.add(creatingQueriesLabel);
progressBar = new JProgressBar();
progressBar.setSize(480, 50);
progressBar.setValue(0);
progressBar.setStringPainted(true);
progressBar.setLocation(creatingQueriesLabel.getX(),
creatingQueriesLabel.getY() + creatingQueriesLabel.getHeight());
panel.add(progressBar);
frame.add(box);
frame.add(panel);
// Display the window.
frame.pack();
frame.setSize(520, 280);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
/**
* Invoked when task's progress property changes.
*/
public void propertyChange(PropertyChangeEvent evt)
{
if ("progress" == evt.getPropertyName())
{
int progress = (Integer) evt.getNewValue();
progressBar.setValue(progress);
}
if ("currentQueryText" == evt.getPropertyName())
{
String text = (String) evt.getNewValue();
creatingQueriesLabel.setText(text);
}
}
Problems:
You're setting sizes and positions using absolute positioning -- don't as that's not how Swing works and this will lead to GUI's that are very hard to maintain and enhance, as you're finding out.
Use the SwingConstants.CENTER int when constructing the JLabel so that its text is centered
Add it to a container that uses BorderLayout, probably in the BorderLayout.PAGE_START position.
Unrelated problem -- don't do this: if ("currentQueryText" == evt.getPropertyName()) {. This tests for reference equality which is not what you want to test for. Use the equals method instead.
This GUI looks like it should be a dialog window, a temporary window that is displaying information not shown in the main parent window (the JFrame window), and so it should be displayed in a JDialog, not a JFrame.
For example:
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.Dialog.ModalityType;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
#SuppressWarnings("serial")
public class CreatingSpeciesPanel extends JPanel {
public static final String INITIALIZING = "Initializing...";
public static final String DONE = "DONE!";
private static final int PREF_W = 480;
private static final int PREF_H = 150;
private static final int GAP = 20;
private static final float TITLE_SIZE = 24f;
private JLabel title = new JLabel(INITIALIZING, SwingConstants.CENTER);
private JProgressBar progressBar = new JProgressBar();
public CreatingSpeciesPanel() {
title.setFont(title.getFont().deriveFont(Font.BOLD, TITLE_SIZE));
progressBar.setValue(0);
progressBar.setStringPainted(true);
JPanel centerPanel = new JPanel(new BorderLayout());
centerPanel.add(progressBar, BorderLayout.PAGE_END);
setLayout(new BorderLayout());
setBorder(BorderFactory.createEmptyBorder(GAP, GAP, GAP, GAP));
add(title, BorderLayout.PAGE_START);
add(centerPanel, BorderLayout.CENTER);
}
#Override
public Dimension getPreferredSize() {
if (isPreferredSizeSet()) {
return super.getPreferredSize();
}
return new Dimension(PREF_W, PREF_H);
}
public void setValue(int value) {
progressBar.setValue(value);
}
public void setTitleLabelText(String text) {
title.setText(text);
}
private static void createAndShowGui() {
final CreatingSpeciesPanel creatingSpeciesPanel = new CreatingSpeciesPanel();
final JFrame mainFrame = new JFrame("Main Frame");
JButton createSpeciesBtn = new JButton(new AbstractAction("Create Species") {
#Override
public void actionPerformed(ActionEvent e) {
creatingSpeciesPanel.setTitleLabelText(CreatingSpeciesPanel.INITIALIZING);
final JDialog dialog = new JDialog(mainFrame, "Creating Species", ModalityType.APPLICATION_MODAL);
dialog.add(creatingSpeciesPanel);
dialog.pack();
dialog.setLocationRelativeTo(mainFrame);
new Timer(200, new ActionListener() {
private int doneCount = 0;
private int value = 0;
private static final int MAX_DONE_COUNT = 10;
#Override
public void actionPerformed(ActionEvent e) {
if (value < 100) {
value += (int) Math.random() * 5 + 5;
value = Math.min(100, value);
creatingSpeciesPanel.setValue(value);
if (value == 100) {
creatingSpeciesPanel.setTitleLabelText(CreatingSpeciesPanel.DONE);
}
} else {
// let's display the dialog for 2 more seconds
doneCount++;
if (doneCount >= MAX_DONE_COUNT) {
((Timer) e.getSource()).stop();
dialog.setVisible(false);
}
}
}
}).start();
dialog.setVisible(true);
}
});
JPanel panel = new JPanel();
panel.add(createSpeciesBtn);
panel.setPreferredSize(new Dimension(500, 400));
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.getContentPane().add(panel);
mainFrame.pack();
mainFrame.setLocationRelativeTo(null);
mainFrame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
I am trying to do have two button in JFrame, and I call the setBounds method of them for setting the positions and size of them and also I passed null to setLayout1 because I want to usesetBounds` method of component.
Now I want to do something with my code that whenever I resize the frame buttons decoration will change in a suitable form like below pictures:
I know it is possible to use create an object from JPanel class and add buttons to it and at the end add created panel object to frame, but I am not allowed to it right now because of some reason (specified by professor).
Is there any way or do you have any suggestion?
My code is like this:
public class Responsive
{
public static void main(String[] args)
{
JFrame jFrame = new JFrame("Responsive JFrame");
jFrame.setLayout(null);
jFrame.setBounds(0,0,400,300);
JButton jButton1 = new JButton("button 1");
JButton jButton2 = new JButton("button 2");
jButton1.setBounds(50,50,100,100);
jButton2.setBounds(150,50,100,100);
jFrame.add(jButton1);
jFrame.add(jButton2);
jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jFrame.setVisible(true);
}
}
A FlowLayout with no horizontal spacing, some vertical spacing and large borders could achieve that easily. A null layout manager is never the answer to a 'responsive' robust GUI.
import java.awt.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
public class ResponsiveGUI {
private JComponent ui = null;
ResponsiveGUI() {
initUI();
}
public void initUI() {
if (ui!=null) return;
ui = new JPanel(new FlowLayout(FlowLayout.CENTER, 0, 8));
ui.setBorder(new EmptyBorder(10,40,10,40));
for (int i=1; i<3; i++) {
ui.add(getBigButton(i));
}
}
public JComponent getUI() {
return ui;
}
private final JButton getBigButton(int number) {
JButton b = new JButton("Button " + number);
int pad = 20;
b.setMargin(new Insets(pad, pad, pad, pad));
return b;
}
public static void main(String[] args) {
Runnable r = new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception useDefault) {
}
ResponsiveGUI o = new ResponsiveGUI();
JFrame f = new JFrame("Responsive GUI");
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
f.setLocationByPlatform(true);
f.setContentPane(o.getUI());
f.pack();
f.setVisible(true);
}
};
SwingUtilities.invokeLater(r);
}
}
You could try to use:
jFrame.addComponentListener(new ComponentListener() {
// this method invokes each time you resize the frame
public void componentResized(ComponentEvent e) {
// your calculations on buttons
}
});
For Example:
When JButton1 click JInternalFrame1 Show on the JDesktopPane
And when JButton2 Click JInternalFrame1 Close and JInternalFrame2 Show on the JDesktopPane.
thx before
Edit: with code from comment
if (JInternalFrame1 == null) {
JInternalFrame1 = new FJInternalFrame();
Desktop.add(JInternalFrame1);
JInternalFrame1.toFront();
} else {
JInternalFrame1.dispose();
}
Take a look at this example. I created a custom JInternalFrame that has a different title every time you create a new frame. when you click on the button, a new one is created and the old one disapears
Here is the important code that may help you out. I add a new frame if the desktop size is equal to 0, other wise I remove the previous one, add a new frame, and revalidate
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (desktop.getAllFrames().length == 0) {
desktop.add(new MyInternalFrame());
} else {
desktop.remove(0);
desktop.add(new MyInternalFrame());
revalidate();
repaint();
}
}
});
Here is the complete code. It's two different files.
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class InternalFrameDemo1 extends JPanel {
JDesktopPane desktop;
JButton button;
public InternalFrameDemo1() {
desktop = new JDesktopPane();
button = new JButton("Get Next Frame");
setLayout(new BorderLayout());
add(desktop, BorderLayout.CENTER);
add(button, BorderLayout.SOUTH);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (desktop.getAllFrames().length == 0) {
desktop.add(new MyInternalFrame());
} else {
desktop.remove(0);
desktop.add(new MyInternalFrame());
revalidate();
repaint();
}
}
});
}
public static void createAndShowGui() {
JFrame frame = new JFrame();
frame.add(new InternalFrameDemo1());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationByPlatform(true);
frame.pack();
frame.setVisible(true);
}
public Dimension getPreferredSize() {
return new Dimension(500, 500);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
import javax.swing.JInternalFrame;
public class MyInternalFrame extends JInternalFrame {
static int openFrameCount = 0;
static final int xOffset = 30, yOffset = 30;
public MyInternalFrame() {
super("Document #" + (++openFrameCount),
true, //resizable
true, //closable
true, //maximizable
true);//iconifiable
setSize(300,300);
setLocation(xOffset*openFrameCount, yOffset*openFrameCount);
setVisible(true);
}
}