I would replace the same panel several times , but do not know how to do.
I created a class " Grafico " which has a constructor that initializes with more parameters that I calculate in my code . For simplicity I will omit these parameters .
"box " is a JComboBox that depending on the selected item is activated and creates these panels
For example:
JPanel middle = new JPanel(new BorderLayout());
Grafico graph1 = new Grafico(.......);
JPanel conf1 = new JPanel();
middle.add(graph1, BorderLayout.CENTER);
middle.add(conf1, BorderLayou.EAST);
frame.getContentPane().add(middle);
box.addItemListener(new ItemListener() {
#Override
public void itemStateChanged(ItemEvent e) {
.........//I do something..I create a new object of type "Grafico" with new parameters........................
Grafico graph2 = new Grafico(.......);
middle.remove(graph1);
middle.add(graph2, BorderLayout.CENTER);
frame.getContentPane().add(middle);
frame.getContentPane().revalidate();
frame.getContentPane().repaint();
}
});
And this works , but the second time I click on an object in the JComboBox I wish it would update me graph2 every time, without creating a new one every click , but it does not!
You have to call repaint() and revalidate() in order to refresh the Panel.
Java Swing revalidate() vs repaint()
Related
I have a JPanel which consists of a dropdown and a text field inside my JFrame. There is a button in my JFrame, when user clicks on that button, application adds new JPanel with the same components i.e. drop down and a text field. So, for this I have created a function which gets called on clicking on the button using ActionListener.
Everything works fine from GUI side but the problem is when user is done with adding JPanels and entering the values in these drop downs and text fields, it will click on Submit button. Upon clicking on Submit button, I should be able to fetch the values from all drop downs and text fields. This is a challenge, since I am using the same functions to create JPanels, I can't call its name to get the values since that will give me the last JPanel values.
Any suggestion how I should go about this? I have added the screenshot of my JFrame and the function to create the JPanel. Any help is appreciated. Thanks.
public static void AddPanel(final Container pane) {
panel1 = new JPanel();
String text = "<html><b>Property" + nooftimes + " :</b></html>";
JLabel label = new JLabel(text);
label.setPreferredSize(new Dimension(80, 30));
panel1.add(label);
panel1.add(new JLabel("Please enter the property"));
DefaultComboBoxModel<String> model = new DefaultComboBoxModel<String>();
model.addElement("value1");
model.addElement("value2");
model.addElement("value3");
model.addElement("value4");
model.addElement("value5");
final JComboBox<String> comboBox1 = new JComboBox<String>(model);
AutoCompleteDecorator.decorate(comboBox1);
comboBox1.setPreferredSize(new Dimension(120, 22));
panel1.add(comboBox1);
final JTextField txtfield1 = new JTextField(
"Please enter your value here");
txtfield1.setPreferredSize(new Dimension(200, 22));
panel1.add(txtfield1);
txtfield1.addFocusListener(new FocusListener() {
public void focusGained(FocusEvent e) {
txtfield1.setText("");
}
public void focusLost(FocusEvent e) {
// nothing
}
});
container.add(panel1);
nooftimes++;
frame.revalidate();
frame.validate();
frame.repaint();
}
Screenshot:
}
You could return the JPanel and store it in a List<JPanel>. When you click your submit-Button you are able to iterate through the JPanels and its Components.
public class Application {
private static List<JPanel> panels = new ArrayList<>();
private static Container someContainer = new Container();
public static void main(String[] args) {
panels.add(addPanel(someContainer));
panels.add(addPanel(someContainer));
panels.add(addPanel(someContainer));
submit();
}
public static JPanel addPanel(final Container pane) {
JPanel panel1 = new JPanel();
// shortened code
final JComboBox<String> comboBox1 = new JComboBox<String>();
panel1.add(comboBox1);
final JTextField txtfield1 = new JTextField("Please enter your value here");
txtfield1.setText(String.valueOf(Math.random()));
panel1.add(txtfield1);
return panel1;
}
private static void submit() {
for (JPanel panel : panels) {
Component[] components = panel.getComponents();
for (Component comp : components) {
// Cast comp to JComboBox / JTextField to get the values
if (comp instanceof JTextField) {
JTextField textField = (JTextField) comp;
System.out.println(textField.getText());
}
}
}
}
}
You could simply have a class (extending JPanel) with specific methods to add your components , and to get inputs from user (i.e. get the combo box selected index and text from textfield ).
Every time you add a panel, you don't call a static method, but you create an instance of this class, keeping the reference somewhere (for example adding it to an arraylist).
But you could consider a different scenario: personally i don't like to add components "on fly", you could have a component (for example another JComboBox), where user can select the number of values he needs.
You decide a default value (for example 4), so at the beginning you create 4 panels of your class, and you can use a simple array containing them.
If the user changes the number of panels, you could dispose frame and create a new one.
Of course this solution does not woork good if you want to keep inputs inserted, or if the frame construction takes a lot of time.
Here there is a screenshot of a gui i created: user can select the number of partials, when the choice changes i just recreate the panels below,containing the textfields (which are memorized in a two-dimensional array).
I have set a game menu screen on my JFrame using a layered panel. I want to remove all the components from the JFrame and add a new content panel. I've spent a few hours trying to work through this issue but I am unable to come up with a good solution.
public myJFrame ()
{
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLayout(new BorderLayout());
setSize (1030, 727);
setVisible(true);
newGame = new JButton();
loadGame = new JButton();
quitGame = new JButton();
newGame.setBounds(new Rectangle(10,600,200,110));
newGame.setIcon(pic1);
newGame.setOpaque(false);
newGame.setContentAreaFilled(false);
newGame.setBorderPainted(false);
loadGame.setBounds(new Rectangle(210,600,200,110));
loadGame.setIcon(pic2);
loadGame.setOpaque(false);
loadGame.setContentAreaFilled(false);
loadGame.setBorderPainted(false);
quitGame.setBounds(new Rectangle(410,600,200,110));
quitGame.setIcon(pic3);
quitGame.setOpaque(false);
quitGame.setContentAreaFilled(false);
quitGame.setBorderPainted(false);
background.setBounds(0,0,1030,727);
titletext.setBounds(0,0,726,170);
lp = getLayeredPane();
lp.add(titletext, new Integer (4)); //* I messed around with these integers quite a bit. *//
lp.add(newGame, new Integer (20)); //* They don't seem to be logically adding to the panel. *//
lp.add(loadGame, new Integer(20)); //* I want the background and titletext to appear behind *//
lp.add(quitGame, new Integer (20)); //* the JButtons. *//
lp.add(background, new Integer (1));
newGame.addActionListener(this);
loadGame.addActionListener(this);
quitGame.addActionListener(this);
}
public void actionPerformed(ActionEvent event)
{
Object obj = event.getSource();
if (obj == newGame)
{
System.out.println("New Game");
lp.remove(4);
getContentPane().add(mop, "Center"); //* Removes myWelcomePanel mwp and adds myOptionsPanel mop *//
repaint();
mop.startgame.addActionListener(this);
}
I have tried repainting, revalidating and removing only certain components but nothing seems to work. I would expect the code posted above to remove the titletext image, but it removes the background image instead.
I would prefer not to mess with the second content pane because it contains a number of objects which I have configured previously.
JLayeredPane.remove(int) refers to the child's absolute index, not its layer position. Why don't you either remove by reference, or simply set the child component's visibility to hidden?
I found a way to make it work. It seems that I must remove each component individually instead of using removeAll(). I identified a new GridLayout sp and set that as the layout. Finally, I had to use revalidate instead of repaint. Repaint left me with a blank screen. If anyone could comment on what is happening here, I would appreciate it!
public void actionPerformed(ActionEvent event)
{
Object obj = event.getSource();
if (obj == newGame)
{
System.out.println("New Game");
lp.remove(background);
lp.remove(titletext);
lp.remove(newGame);
lp.remove(loadGame);
lp.remove(quitGame);
getContentPane().setLayout(sp);
getContentPane().add(mop, "Center");
revalidate();
mop.startgame.addActionListener(this);
}
I have a Swing application using Card Layout which basically changes the displayed panel depending on what the user selects from a drop-down menu.
One of my panels has a form. I would need for when the submit buton is pressed for all the inputs to be collected and the Panel to be switched to another one. (This second panel is defined in a separate class) I would also need for all the input to be somehow passed to a method in the new panel.
Any suggestions?
Dario
If you look at the <--s in the following code, each should solve each different question you have in your post. I figured you should know how to make a submit button, so I didn't include that. (Note: this is not running code, just suggestions);
public class MainPanel entends JPanel {
CardLayout layout = new CardLayout(); <-- card layout
JPanel panel = new JPanel(layout); <-- set layout to main panel
NewPanel newPanel = new NewPanel(); <-- you new panel
JPanel p1 = new JPanel(); <-- random panel
JTextField text = new JTextField() <-- text field in form
JButton button = new JButton();
JComboBox cbox = new JComboBox(new String[] {"newPanel", "p1"}); <-- hold panel names
public MainPanel(){
panel.add(newPanel, "newPanel"); <-- name associated with panel
panel.add(p1, "p1");
...
cbox.addAItemListener(new ItemListener(){
public void itemStateChnaged(ItemEvent e){
layout.show(panel, (string).getItem()); <-- show Panel from combobox
}
});
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String txt = text.getText();
newPanel.printText(txt); <-- Using method from other class
}
});
}
}
public class NewPanel extends JPanel {
public void printText(String text){ <-- method from other class
System.out.println(text);
}
}
I was just having a problem with this:
public class Sales extends JPanel{
ArrayList<JPanel> panes;
ArrayList<String> tabs;
JTabbedPane tp;
public Sales(Dimension d){
setSize(d);
setLayout(null);
tp = new JTabbedPane();
Font f = new Font("Arial",Font.PLAIN,32);
tp.setFont(f);
for(Menu menu : FileManager.menus){
JPanel tmp = new JPanel();
/*int s = (int) Math.ceil(Math.sqrt(menu.products.size()));
tmp.setLayout(new GridLayout(s,s));
System.out.println("size" + s);
for(Product p : menu.products){
p.setFont(f);
tmp.add(p);
}*/
tp.addTab(menu.name,null,tmp,"What is this?");
}
tp.setBounds(0,0,getWidth(),getHeight());
add(tp);
}
}
Where Sales is just added to a simple JFrame:
public Main(){
super("HoboGames Pos System");
setUndecorated(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().setFullScreenWindow(this);
sale = new Sales(getSize());
add(sale);
}
Everything works, except the components don't paint until the window is updated because of a click or something. So it's a blank screen until you click stuff.(Sorry, I cut some corners on things like making it full screen...)
They don't update because you've made the window visible before you've finished adding components to it.
Try something like...
GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().setFullScreenWindow(this);
sale = new Sales(getSize());
add(sale);
setVisible(true);
Alternatively, you could call revalidate and repaint on the frame after you've finished adding your components, but to be honest, it's simpler the first way.
Side Note
Using setSize on a component is strongly discouraged, you should be relying an appropriate layout managed, like BorderLayout to make the decision about the size of the component.
I'm having some troubles with Java Swing.
I'm trying to make a frame with a control panel at the top with some buttons in it.
and below that i want a JTable to show
I've been trying but the table is not showing.
If I remove the controlPanel at the top, it sometimes shows and sometimes not.
The code that I use inside my constructor of my JTable is provided in the same application,
so it's no network error
public ServerMainFrame(GuiController gc){
this.gc = gc;
initGUI();
}
private void initGUI() {
System.out.println("initiating GUI");
createFrame();
addContentPanel();
addControls();
//openPopUpServerSettings();
addSongTable();
}
private void createFrame()
{
this.setTitle("AudioBuddy 0.1");
this.setVisible(true);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setSize(800, 600);
this.setResizable(false);
this.setLocationRelativeTo(null);
}
private void addContentPanel()
{
JPanel p = new JPanel();
p.setLayout(new FlowLayout());
p.setSize(new Dimension(800, 600));
this.setContentPane(p);
}
private void addControls()
{
JPanel controlPanel = new JPanel();
controlPanel.setLayout(new FlowLayout());
controlPanel.setBorder(BorderFactory.createLineBorder(Color.black));
controlPanel.setSize(700,100);
// Buttons
JButton play = new JButton("Play");
JButton pause = new JButton("Pause");
JButton stop = new JButton ("Stop");
JButton next = new JButton("Next");
JButton prev = new JButton("Previous");
controlPanel.add(play);
controlPanel.add(pause);
controlPanel.add(stop);
controlPanel.add(next);
controlPanel.add(prev);
// Currently playing
JLabel playing = new JLabel("Currently playing:");
controlPanel.add(playing);
JLabel current = new JLabel("Johnny Cash - Mean as Hell");
controlPanel.add(current);
this.getContentPane().add(controlPanel);
}
private void addSongTable()
{
JTable songTable = new JTable(Server.getSongTableModel());
songTable.setVisible(true);
JPanel tablePanel = new JPanel();
tablePanel.setVisible(true);
tablePanel.add(songTable);
songTable.repaint();
this.getContentPane().add(tablePanel);
JButton btnMulticastList = new JButton("send list to clients");
btnMulticastList.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
Server.MulticastPlaylist();
}
});
getContentPane().add(btnMulticastList);
}
if I remove the controlPanel at the top, it sometimes shows and
sometimes not.
everything is hidden in Server.getSongTableModel(), nobody knows without posting an SSCCE with hardcoded value returns from
GUI has issue with Concurency in Swing
XxxModel loading data continiously with building GUi, then exception caused described problems
The code that I use inside my constructor of my JTable is provided in
the same application, so it's no network error
no idea what you talking about
have to create an empty GUI, see InitialTread
showing GUI, then to start loading data to JTable
then starting Workers Thread (Backgroung Task) from SwingWorker or (descr. Network issue) better Runnable#Thread (confortable for catching an exceptions and processing separate threads)
output from Runnable to the Swing GUI must be wrapped into invokeLater()
If you want controls at the top of your window, and the table filling the majority of the window, then I'd suggest you try using BorderLayout instead of FlowLayout. Create it like this...
private void addContentPanel()
{
JPanel p = new JPanel();
p.setLayout(new BorderLayout());
p.setSize(new Dimension(800, 600));
this.setContentPane(p);
}
And add the components by specifying the location in the BorderLayout. In this case, the controls should be added to the top in their minimal size...
this.getContentPane().add(controlPanel,BorderLayout.NORTH);
And the table should be in the center, filling the remaining window space...
this.getContentPane().add(tablePanel,BorderLayout.CENTER);
In your case, you also have a button at the bottom...
getContentPane().add(btnMulticastList,BorderLayout.SOUTH);
For the layout you're after, BorderLayout is much more appropriate. The benefit of using BorderLayout here is that the components should be automatically resized to the size of the window, and you're explicitly stating where each component resides, so panels shouldn't not appear.
It would also be my recommendation that you find an alternative to calling getContentPane() in all your methods. Maybe consider keeping a global variable for the main panel, like this...
private mainPanel;
private void addContentPanel()
{
mainPanel = new JPanel(new BorderLayout());
mainPanel.setSize(new Dimension(800, 600));
this.setContentPane(mainPanel);
}
Then you can reference the panel directly when you want to add() components to it.
Finally, I'd also suggest using GridLayout for your controls, as it will allow you to place all your buttons in it, and they'll be the same size for consistency. Define it like this to allow 5 buttons in a horizontal alignment...
JPanel controlPanel = new JPanel(new GridLayout(5,1));
then you just add the buttons normally using controlPanel.add(button) and they'll be added to the next slot in the grid.
For more information, read about GridLayout or BorderLayout, or just see the Java Tutorial for a Visual Guide to Layout Managers to see what alternatives you have and the best one for your situation. In general, I try to avoid FlowLayout, as I find that there are other LayoutManagers that are more suitable in the majority of instances.