Swing/AWT/SWT :: When Click On Button From Bottom Panel Top Panel Need To Be Redrawn
Apr 1, 2014
When i click on the button from bottom panel, top panel need to be redrawn. But redrawing is not happening. It happens only when resizing the applet.
public class Graphics_Chart(){
public init(){
JScrollPane topPane = new JScrollPane(new ImagePanel2());
topPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
topPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);
I want to switch panel on click of a button and code for switching panels is written in update method (Which gets called from notify observer of another class as part of Observer pattern.
playGame in Panel 1 of class 1 calls another class (class 2)and data comes in update method of class 1(Observer interface).
Now for switching panels code is in gameControllerDataProcessing . I am not able to switch the panels when this functionality runs.
However if i dont call the unoGameController.playGame(playerFirst.getText(), playerSecond.getText() and directly call the update method or directly write the switching panel code . then it works fine.
In JButton's click event, I wanto to show a JPanel to print the message "Processing" on the screen. Before JButton's click logic end, hide the JPanel.
Actually, JPanel is not displayed. I do not know why.When msgPanel .setVisible(false); is commented out, JPanel is normally displayed .But do not know how to hide it when JButton's click logic is finished.
Here is the code.
loadBtn.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent arg0) { JPanel msgPanel = new JPanel(rootFrame); // Show the message JPanel
I have three classes.. 1. panel class 2. frame class and 3. tester class...I am creating the objects like so but when I add button to panel then panel to frame I am not seeing the button. here is my code
import javax.swing.JButton; import javax.swing.JPanel; public class Panel extends JPanel{ private JPanel p; private JButton b;
I currently have the code set up to iterate through objects and keep track of them but how do I do the same and draw the objects on the panel window? I'm confused on what to do and how to start it.
Here's the code I have so far, the 'Car' which I want to draw extends to another class which extends to GameObject. I currently have a 'draw()' method under the 'Car' class but nothing in the 'draw()' method yet. From what I understand i'm suppose to have a 'draw()' method under 'GameObjects' class also?
public class MapView extends JPanel implements IObserver, ActionListener{ JPanel myPanel; private Timer timer = new Timer(5, this); int x = 0; int moveX = 2; public MapView(){ super.setBorder(BorderFactory.createTitledBorder("Map:"));
[code]....
Mostly I don't understand how to go through the iterator again to paint the objects. Wouldn't I need to put another iterator under 'paintComponent()' or can it be done under 'update()' ?
how to get some shapes from the GameObjects onto my panel.
I've created a chat program, but now I need to show messages in different colors depending if the message is received or sent. I was wondering if I can use jlabel to do this but in this case I need that jlabels to scroll in a jpanel. how to do this or maybe using a rtf ?
I have this panel in a nested class in the MainPanel class and it does not display, when I launch the applet, or more like, the two menus "LineColor" and "BackColor" from the nested class ColorPanel do not display .
My panel named panelIncomeInfo are not showing the components that I have added.
public class PayrollGUI { private JPanel panelIncomeInfo = new JPanel (); private JPanel panel = new JPanel (); private JPanel panelPayCheckInfo = new JPanel (); private JButton close = new JButton ("Close");
Is it possible to make Expand/Collapsable panels in Java without writing huge amounts of code? I want something like this Expand/Collapse How would I go about it?
I am getting datas from user and checking it with database (MS SQL ) if it fits it is sweatching to new window. In new window I need to use again my database so I need to add connecting datas again. I would like to get them from login window. How to do that? I know theory but when I am writting code nothing works. Here is working code for login panel :
/*import java.awt.BorderLayout; import javax.swing.*; public class Login extends JFrame { public String url; public static void main(String[] args) { Log frameTabel = new Log();
I have two classes: main (with JFrame) and a panelLogin class with a method returning a panel with all login components..so I create a new panelLogin in main and use the method to get the panel, put it into my JFrame. But here the problem: on the loginPanel the ActionListener for the login-event, if the input is correct,the panel shall disappear and the main panel shall appear.Should I make some kind of top class, which handels the panels?
I have a program with a main panel JPanel that implements KeyListener. I added a JTextArea to which I added as the KeyListener: this, meaning the main panel. I made the JTextArea fill the entire main panel because I want to catch a key press anywhere in the main panel.I catch the key presses and the program does what I want it to.
I added a JToolBar to the program; it is working just fine.Now that I have two components on the main panel - toolbar and panel with textarea -, the textarea must have the focus before it will send the KeyEvent and call keyPressed(). I don't want to expect the user to click on the main window to get the program to start or after each time they use the toolbar.
I have tried calling both requestFocus() and requestFocusInWindow() on the textarea; neither call worked. I put the toolbar at PAGE_END instead of PAGE_START; this worked to allow the program to start but I don't want to have the toolbar at the bottom and once I clicked on a toolbar button, the textarea lost the focus.
I need to be able to give the textarea the focus when the program starts and after the user uses a toolbar button. (I suspect that if I solve the problem when the program starts, I can use the same method after handling a button press.)
I am trying to read Point objects from .drw file which contains endpoints of line segments, and draw lines making a square on panel when I run the program. This is what I have got so far. how to get the points using array for drawing ?
// inside the method to read points objects from .drw file try { fos = new FileInputStream("square.drw"); oos = new ObjectInputStream(fos); // creating an object of Point class endPoints = new Point[sampleSize];
I am trying to make a Connect Four game with java swing, but I am getting an error with my attempt at making an multi D panel maker when I try to run it.
I have buttons created on a frame and then I register the listener from a controller in a controller-view relationship.
When I click the button on the face, the action never executes for some reason. I thought maybe there was a problem registering the listener but I can call the buttons doclick() method and it executes as it should. Perhaps I'm overlooking something really obvious here but I can't see it.
again, when i click the button nothing happens. but if i add the following code
btnEight.doclick()
the actionPerformed invokes in theController as I intended.
You can see the entire project on GitHub so you can see the full context. The controller class contains the listener and the view class contains the buttons.
I've recently decided to learn Java on my own using internet material such as forums, blogs and you tube. Ive never programed before but through some research I concluded that Java is going to be on the mid spectrum of difficulty as far as verbiage goes. I ma in no way implying that Java is easy but instead closer to spoken English that c++ if my research is correct. So here is my attempt at a basic program where I click a button and it will make an image appear. Not sure where Im falling short
package clicktoimage; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Clicktoimage extends JFrame { private JLabel label; private ImageIcon image;
Projectsrccom.mypackageMyClass.java resourcesicon.pngmyexe.exe Right now I have to run the exe like this : - It has hardcoded the path of the exe :command = "cmd /c start /b cmd.exe /K "cd " + outputFolderPath + " && C:myfoldermyexe.exe " + "param1=value1 param2=value2 " ;
Process p = Runtime.getRuntime().exec(command); This works fine. But, When I package it as a jar I want to give a relative path to my resources folder. How can I make this happen?
I tried:File f = new File("resources/myexe.exe"); String path = f.getAbsolutePath(); but this "path" did not work.
Another way would be to extract the exe to a local path on the server, but there is a possibility that I could face permission issues.
I read the oracle doc example, i understand the concept but still nothing is happening on show,first ,next method of CardLayout in ActionPerformed. Code is highlighted where I am facing problem.
I have a JPanel that's using a simple GridBagLayout.
JPanel panel = new JPanel(); GridBagLayout qPanelLayout = new GridBagLayout(); qPanelLayout.columnWidths = new int[] { 0 }; qPanelLayout.rowHeights = new int[] { 0 }; qPanelLayout.columnWeights = new double[] { Double.MIN_VALUE }; qPanelLayout.rowWeights = new double[] { 0.0 }; panel.setLayout(qPanelLayout); componentCount = 0;
Based on user input I am adding sub-panels to the panel. These sub-panels may vary in height. They take up the full width of the Panel.
public void add(Component comp) { GridBagConstraints gbc = new GridBagConstraints(); gbc.fill = GridBagConstraints.HORIZONTAL; gbc.insets = new Insets(2,2,2,2); gbc.gridx = 0; gbc.gridy = componentCount++; panel.add(comp, gbc_questionPane1); }
The odd behaviour I'm seeing is that if the height of the new sub-panel I'm adding is less than the height of the largest sub-panel currently displayed then the main panel does not repaint. If its height is equal or greater then the Panel does repaint, and any sub-panels that were added but not visible before are now painted. What have I missed?
The gist of it is to create a very basic memory game. There are 12 buttons, each associated with an icon. Every button that you click will display the icon and will stay there until clicked again. I got the bulk of it taken care of, but my issue lies with switching the icons back and forth. I can get them to display one at a time, but when I click on a new button, all the icons except the button I just clicked don't display. Essentially, only one shows up at a time.
import javax.swing.*; import java.awt.*; public class PRJ04 extends JFrame { public static void main (String [] args) { PRJ04 frmApp = new PRJ04(); PanelChart pnlChart = new PanelChart();
[Code] .....
When I comment out the adding and setting of the pnlChart on my main driver, the pnlPopulationInputs shows up fine, and it runs ok. When I add the pnlChart I get errors like crazy and a white screen. My errors:
Exception in thread "AWT-EventQueue-0" java.lang.ArithmeticException: / by zero at PanelChart.drawChart(PanelChart.java:45) at PanelChart.paintComponent(PanelChart.java:24) at javax.swing.JComponent.paint(JComponent.java:1054)
[Code] ....
Once more with this one, I refer back to our in class example. Our programs are set up the same, yet he has no issues with the "/ by zero" exception.
