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  • Java swing examples - Ants running around a world getting food from piles?

    - by Charlie
    I haven't done any swing programming in a while, so I'm looking for some GUI examples that are at least close to what I'm trying to do. The gui that I'll need to be representing is small nodes (let's say ants) travelling around collecting food from food piles (which just means small nodes travelling to bigger nodes). Once the node (ant) takes a piece of food, the pile shrinks a bit and the ant takes it back home (to ANOTHER circle). This SOUNDS pretty trivial, but all of the boilerplate involved in setting up a java GUI just makes little logical sense to me, and the GUI is such a small piece of my project. Any examples that would be great for this style of project would be greatly appreciated. Thanks!

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  • How to use third party themes in swing application?

    - by swift
    I want to use some third party themes (like synthetica http://www.javasoft.de/synthetica/themes/) in my swing appliaction. i am using eclipse ide, got the jar file of theme and did the following modification(according to the readme file from the theme) in my code try { UIManager.setLookAndFeel(new SyntheticaBlackMoonLookAndFeel()); } catch (Exception e) { e.printStackTrace(); } but after this modification its showing the following error The type de.javasoft.plaf.synthetica.SyntheticaLookAndFeel cannot be resolved. It is indirectly referenced from required .class files what does this mean? i tried searching on net but cant really find any useful answers Contents of Readme file: System Requirements =================== Java SE 5 (JRE 1.5.0) or above Synthetica V2.2.0 or above Integration =========== 1. Ensure that your classpath contains all Synthetica libraries (including Synthetica's core library 'synthetica.jar'). 2. Enable the Synthetica Look and Feel at startup time in your application: import de.javasoft.plaf.synthetica.SyntheticaBlackMoonLookAndFeel; try { UIManager.setLookAndFeel(new SyntheticaBlackMoonLookAndFeel()); } catch (Exception e) { e.printStackTrace(); }

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  • Best way to implement refusing a value change by the user in Swing?

    - by Michael Borgwardt
    I have a JCheckBox that should not be checked by the user when a certain other field is empty. So now I want to have an error popup and then reset the checkbox (I've considered disabling the checkbox, but the connection to the other field is non-obvious, and a tooltip text IMO not visible enough). What's the correct way to do that in Swing? Through a PropertyVetoException? Where do I throw it and where do I catch it? My first (probably ugly) idea would be to add a ChangeListener that itself shows the popup and resets the value.

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  • Swing: what to do when a GUI update takes too long and freezes other GUI elements?

    - by java.is.for.desktop
    Hello, everyone! I know that GUI code in Java Swing must be put inside SwingUtilities.invokeAndWait or SwingUtilities.invokeLater. This way threading works fine. Sadly, in my situation, the GUI update it that thing which takes much longer than background thread(s). More specific: I update a JTree with about just 400 entries, nesting depth is maximum 4, so should be nothing scary, right? But it takes sometimes one second! I need to ensure that the user is able to type in a JTextPane without delays. Well, guess what, the slow JTree updates do cause delays for JTextPane during input. It refreshes only as soon as the tree gets updated. I am using Netbeans and know empirically that a Java app can update lots of information without freezing the rest of the UI. How can it be done? NOTE 1: All those DefaultMutableTreeNodes are prepared outside the invokeAndWait. NOTE 2: When I replace invokeAndWait with invokeLater the tree doesn't get updated.

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  • When should I write my own Look and Feel for Java Swing instead of customizing one?

    - by Jonas
    I have used a few different Look and Feels for Java Swing, but I don't really like anyone to 100% so I often end up with customizing it a lot. Sometimes I am thinking about if it is a better idea to write my own LaF (by extending an existing one), but I don't really know. For the moment, I mostly use Nimbus, but I change all colors (to darker ones) and rewrite the appearance of some components, like sliders and scrollbars. I also mostly customize all tables and I am thinking about to change the look of a few other components. When is it recommended to create a new Look-and-Feel instead of customizing one? What are the pros and cons? I.e. customize Nimbus or create a new one by extending Nimbus? Related article: Creating a Custom Look and Feel (old)

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  • Java - How can I edit the size and position of a button using Swing?

    - by mino
    I have the following code but I'd like to structure several buttons of certain sizes. I'm just wondering how to do this as I've Googled it and found several different methods but none seem to work. Any advice? import javax.swing.*; public class GUI { public static void main(String[] args) { JFrame window = new JFrame(); window.setSize(500, 500); window.setTitle("My Application"); JButton button = new JButton("click me"); window.add(button); window.setVisible(true); } }

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  • What's the easiest way for a Java Swing client to consumer a webservice?

    - by Stephane Grenier
    I have a Java Swing application client that I want to use to consume certain webservices, but I want to make it as painless as possible to code (because really all I want is the info). I do understand that whatever solution is used will need to stub the POJO's too. If you'd like to give a demo, that would be great, or if you can point to a tutorial that would also be really appreciated. I did look at Axis, including the more recent Axis2, but it's a bit more complex than I was hoping (aka. I have to learn something). At least just for some quick prototype testing and not real development, more for the sake of just saying I can, is there something or a tutorial out there?

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  • How do I keep JTextFields in a Java Swing BoxLayout from expanding?

    - by Matthew
    I have a JPanel that looks something like this: JPanel panel = new JPanel(); panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS)); ... panel.add (jTextField1); panel.add (Box.createVerticalStrut(10)); panel.add (jButton1); panel.add (Box.createVerticalStrut(30)); panel.add (jTextField2); panel.add (Box.createVerticalStrut(10)); panel.add (jButton2); ... //etc. My problem is that the JTextFields become huge vertically. I want them to only be high enough for a single line, since that is all that the user can type in them. The buttons are fine (they don't expand vertically). Is there any way to keep the JTextFields from expanding? I'm pretty new to Swing, so let me know if I'm doing everything horribly wrong.

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  • How to make my Java Swing application a Client-Server application?

    - by Jonas
    I have made a Java Swing application. Now I would like to make it a Client-Server application. All clients should be notified when data on the server is changed, so I'm not looking for a Web Service. The Client-Server application will be run on a single LAN, it's a business application. The Server will contain a database, JavaDB. What technology and library is easiest to start with? Should I implement it from scratch using Sockets, or should I use Java RMI, or maybe JMS? Or are there other alternatives that are easier to start with? And is there any server library that I should use? Is Jetty an alternative?

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  • Java Swing - How to access a JComponent of one JPanel from other JPanel, both added to the JFrame?

    - by Yatendra Goel
    I am developing a Java Desktop Application with GUI implemented in SWING. I hava a JFrame. I have added three JPanels on that. One JPanel panel1 has a Start Button. Now I want to disable various componets on other JPanels when a user presses the start button on the panel1. Now how can I access the components of those other panels from panel1. I know that one approach is to first get the container of panel1 panel1.getParent(); Then get the components of the container container.getComponents(); and use them as per need. Q1. Is there any other way by which I can perform the same task? (I think this is the only way) Q2. After getting the components list of the container, how to differentiate one container with other?

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  • How to make a swing app aware of screen size change?

    - by Marton Sigmond
    Hi, while my swing app is running I change the size of the screen (e.g. from 1024x768 to 800x600). Is there any event I can listen to to be notified about this? Alternatively I could check the screen size in every couple of second, but the Toolkit.getScreenSize() keeps telling me the old value. How could I get the real screen size after the change? Environment: Linux (tested on SuSE ES 11 and Ubuntu 9.04) I appreciate your help. Marton

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  • How can I print a text in two columns using Java Swing?

    - by Jonas
    I have a longer text saved in a String. I would like to print the text in two columns on a single page. How can I do this using Java Swing? I don't understand how I can wrap the text when it's time to use a new line. I have read Lesson: Printing in the Java tutorial, but I haven't found any useful methods for working with text or Strings except FontMetrics. Is there any good methods in the Java API for this or is there any good library I can use for this?

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  • Swing: what to do when a JTree update takes too long and freezes other GUI elements?

    - by java.is.for.desktop
    Hello, everyone! I know that GUI code in Java Swing must be put inside SwingUtilities.invokeAndWait or SwingUtilities.invokeLater. This way threading works fine. Sadly, in my situation, the GUI update it that thing which takes much longer than background thread(s). More specific: I update a JTree with about just 400 entries, nesting depth is maximum 4, so should be nothing scary, right? But it takes sometimes one second! I need to ensure that the user is able to type in a JTextPane without delays. Well, guess what, the slow JTree updates do cause delays for JTextPane during input. It refreshes only as soon as the tree gets updated. I am using Netbeans and know empirically that a Java app can update lots of information without freezing the rest of the UI. How can it be done? NOTE 1: All those DefaultMutableTreeNodes are prepared outside the invokeAndWait. NOTE 2: When I replace invokeAndWait with invokeLater the tree doesn't get updated. NOTE 3: Fond out that recursive tree expansion takes far the most time. NOTE 4: I'm using custom tree cell renderer, will try without and report. NOTE 4a: My tree cell renderer uses a map to cache and reuse created JTextComponents, depending on tree node (as a key). CLUE 1: Wow! Without setting custom cell renderer it's 10 times faster. I think, I'll need few good tutorials on writing custom tree cell renderers.

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  • how to execute two thread simultaneously in java swing?

    - by jcrshankar
    My aim is to select all the files named with MANI.txt which is present in their respective folders and then load path of the MANI.txt files different location in table. After I load the path in the table,I used to select needed path and modifiying those. To load the MANI.txt files taking more time,because it may present more than 30 times in my workspace or etc. until load the files I want to give alarm to the user with help of ProgessBar.Once the list size has been populated I need to disable ProgressBar. Could anyone please help me out on this? import java.awt.*; import javax.swing.*; import javax.swing.table.*; import java.awt.event.*; import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; public class JTableHeaderCheckBox extends JFrame implements ActionListener { Object colNames[] = {"", "Path"}; Object[][] data = {}; DefaultTableModel dtm; JTable table; JButton but; java.util.List list; public void buildGUI() { dtm = new DefaultTableModel(data,colNames); table = new JTable(dtm); table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); int vColIndex = 0; TableColumn col = table.getColumnModel().getColumn(vColIndex); int width = 10; col.setPreferredWidth(width); int vColIndex1 = 1; TableColumn col1 = table.getColumnModel().getColumn(vColIndex1); int width1 = 500; col1.setPreferredWidth(width1); JFileChooser chooser = new JFileChooser(); //chooser.setCurrentDirectory(new java.io.File(".")); chooser.setDialogTitle("Choose workSpace Path"); chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); chooser.setAcceptAllFileFilterUsed(false); if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION){ System.out.println("getCurrentDirectory(): " + chooser.getCurrentDirectory()); System.out.println("getSelectedFile() : " + chooser.getSelectedFile().getAbsolutePath()); } String path= chooser.getSelectedFile().getAbsolutePath(); File folder = new File(path); Here I need progress bar GatheringFiles ob = new GatheringFiles(); list=ob.returnlist(folder); for(int x = 0; x < list.size(); x++) { dtm.addRow(new Object[]{new Boolean(false),list.get(x).toString()}); } JPanel pan = new JPanel(); JScrollPane sp = new JScrollPane(table); TableColumn tc = table.getColumnModel().getColumn(0); tc.setCellEditor(table.getDefaultEditor(Boolean.class)); tc.setCellRenderer(table.getDefaultRenderer(Boolean.class)); tc.setHeaderRenderer(new CheckBoxHeader(new MyItemListener())); but = new JButton("REMOVE"); JFrame f = new JFrame(); pan.add(sp); but.move(650, 50); but.addActionListener(this); pan.add(but); f.add(pan); f.setSize(700, 100); f.pack(); f.setLocationRelativeTo(null); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setVisible(true); } class MyItemListener implements ItemListener { public void itemStateChanged(ItemEvent e) { Object source = e.getSource(); if (source instanceof AbstractButton == false) return; boolean checked = e.getStateChange() == ItemEvent.SELECTED; for(int x = 0, y = table.getRowCount(); x < y; x++) { table.setValueAt(new Boolean(checked),x,0); } } } public static void main (String[] args) { SwingUtilities.invokeLater(new Runnable(){ public void run(){ new JTableHeaderCheckBox().buildGUI(); } }); } public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub if(e.getSource()==but) { System.err.println("table.getRowCount()"+table.getRowCount()); for(int x = 0, y = table.getRowCount(); x < y; x++) { if("true".equals(table.getValueAt(x, 0).toString())) { System.err.println(table.getValueAt(x, 0)); System.err.println(list.get(x).toString()); delete(list.get(x).toString()); } } } } public void delete(String a) { String delete = "C:"; System.err.println(a); try { File inFile = new File(a); if (!inFile.isFile()) { System.out.println("Parameter is not an existing file"); return; } //Construct the new file that will later be renamed to the original filename. File tempFile = new File(inFile.getAbsolutePath() + ".tmp"); BufferedReader br = new BufferedReader(new FileReader(inFile)); PrintWriter pw = new PrintWriter(new FileWriter(tempFile)); String line = null; //Read from the original file and write to the new //unless content matches data to be removed. while ((line = br.readLine()) != null) { System.err.println(line); line = line.replace(delete, " "); pw.println(line); pw.flush(); } pw.close(); br.close(); //Delete the original file if (!inFile.delete()) { System.out.println("Could not delete file"); return; } //Rename the new file to the filename the original file had. if (!tempFile.renameTo(inFile)) System.out.println("Could not rename file"); } catch (FileNotFoundException ex) { ex.printStackTrace(); } catch (IOException ex) { ex.printStackTrace(); } } } class CheckBoxHeader extends JCheckBox implements TableCellRenderer, MouseListener { protected CheckBoxHeader rendererComponent; protected int column; protected boolean mousePressed = false; public CheckBoxHeader(ItemListener itemListener) { rendererComponent = this; rendererComponent.addItemListener(itemListener); } public Component getTableCellRendererComponent( JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { if (table != null) { JTableHeader header = table.getTableHeader(); if (header != null) { rendererComponent.setForeground(header.getForeground()); rendererComponent.setBackground(header.getBackground()); rendererComponent.setFont(header.getFont()); header.addMouseListener(rendererComponent); } } setColumn(column); rendererComponent.setText("Check All"); setBorder(UIManager.getBorder("TableHeader.cellBorder")); return rendererComponent; } protected void setColumn(int column) { this.column = column; } public int getColumn() { return column; } protected void handleClickEvent(MouseEvent e) { if (mousePressed) { mousePressed=false; JTableHeader header = (JTableHeader)(e.getSource()); JTable tableView = header.getTable(); TableColumnModel columnModel = tableView.getColumnModel(); int viewColumn = columnModel.getColumnIndexAtX(e.getX()); int column = tableView.convertColumnIndexToModel(viewColumn); if (viewColumn == this.column && e.getClickCount() == 1 && column != -1) { doClick(); } } } public void mouseClicked(MouseEvent e) { handleClickEvent(e); ((JTableHeader)e.getSource()).repaint(); } public void mousePressed(MouseEvent e) { mousePressed = true; } public void mouseReleased(MouseEvent e) { } public void mouseEntered(MouseEvent e) { } public void mouseExited(MouseEvent e) { } } ****************** import java.io.File; import java.util.*; public class GatheringFiles { public static List returnlist(File folder) { List<File> list = new ArrayList<File>(); List<File> list1 = new ArrayList<File>(); getFiles(folder, list); return list; } private static void getFiles(File folder, List<File> list) { folder.setReadOnly(); File[] files = folder.listFiles(); for(int j = 0; j < files.length; j++) { if( "MANI.txt".equals(files[j].getName())) { list.add(files[j]); } if(files[j].isDirectory()) getFiles(files[j], list); } } }

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  • How can I "pack()" a printable Java Swing component?

    - by Jonas
    I have implemented a Java Swing component that implements Printable. If I add the component to a JFrame, and do this.pack(); on the JFrame, it prints perfect. But if I don't add the component to a JFrame, just a blank page is printed. This code gives a great printout: final PrintablePanel p = new PrintablePanel(pageFormat); new JFrame() {{ getContentPane().add(p); this.pack(); }}; job.setPrintable(p, pageFormat); try { job.print(); } catch (PrinterException ex) { System.out.println("Fail"); } But this code gives a blank page: final PrintablePanel p = new PrintablePanel(pageFormat); // new JFrame() {{ getContentPane().add(p); this.pack(); }}; job.setPrintable(p, pageFormat); try { job.print(); } catch (PrinterException ex) { System.out.println("Fail"); } I think that this.pack(); is the big difference. How can I do pack() on my printable component so it prints fine, without adding it to a JFrame? The panel is using several LayoutManagers. I have tried with p.validate(); and p.revalidate(); but it's not working. Any suggestions? Or do I have to add it to a hidden JFrame before I print the component?

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  • How to put JFrame into existing JPanel in Java Swing?

    - by suud
    I have an open-source java swing application like this: http://i47.tinypic.com/dff4f7.jpg You can see in the screenshot, there is a JPanel divided into two area, left and right area. The left area has many text links. When I click the SLA Criteria link, it will pop-up the SLA Criteria window. The pop-up window is JFrame object. Now, I'm trying to put the pop-up window into right area of the JPanel, so that means no pop-up window anymore, i.e. when I click the SLA Criteria link, its contents will be displayed at the right area of the JPanel. The existing content of the right area of JPanel will not be used anymore. The example illustration (note: it's made and edited using image editor, this is not the real screenshot of working application) is like this: http://i48.tinypic.com/5vrxaa.jpg So, I would like to know is there a way to put JFrame into JPanel? I'm thinking of using JInternalFrame, is it possible? Or is there another way? UPDATE: Source code: http://pastebin.com/tiqRbWP8 (VTreePanel.java, this is the JPanel) http://pastebin.com/330z3yuT (CPanel.java, this is the super class of VTreePanel) http://pastebin.com/MkNsbtjh (AWindow.java, this is the JFrame, pop-up window) http://pastebin.com/2rsppQeE (CFrame.java, this is the super class of AWindow)

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  • How do you hide a Swing Popup when you click somewhere else.

    - by Casey Watson
    I have a Popup that is shown when a user clicks on a button. I would like to hide the popup when any of the following events occur: The user clicks somewhere else in the application. (The background panel for example) The user minimizes the application. The JPopupMenu has this behavior, but I need more than just JMenuItems. The following code block is a simplified illustration to demonstrate the current usage. import java.awt.*; import java.awt.event.ActionEvent; import javax.swing.*; public class PopupTester extends JFrame { public static void main(String[] args) { final PopupTester popupTester = new PopupTester(); popupTester.setLayout(new FlowLayout()); popupTester.setSize(300, 100); popupTester.add(new JButton("Click Me") { @Override protected void fireActionPerformed(ActionEvent event) { Point location = getLocationOnScreen(); int y = (int) (location.getY() + getHeight()); int x = (int) location.getX(); JLabel myComponent = new JLabel("Howdy"); Popup popup = PopupFactory.getSharedInstance().getPopup(popupTester, myComponent, x, y); popup.show(); } }); popupTester.add(new JButton("No Click Me")); popupTester.setVisible(true); popupTester.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }

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  • How can I make my code work in a GUI using Swing in Java?

    - by Razor Shadow
    I'm making a tool that does multiple things, and I'm onto the last feature for now: You type in a date and it tells you what day of the week it would be on that date. So I have two problems here: I can't use I can't use arguments, it doesn't like them On the last line, I can't use jTextArea2.setText(d0); because it doesn't like that either... My code is here: public static void main(String[] args) { int d = Integer.parseInt(args[0]); int m = Integer.parseInt(args[1]); int y = Integer.parseInt(args[2]); int y0 = y - (14 - m) / 12; int x = y0 + y0/4 - y0/100 + y0/400; int m0 = m + 12 * ((14 - m) / 12) - 2; int d0 = (d + x + (31*m0)/12) % 7; System.out.println("Sunday = 0\nMonday = 1\nTuesday = 2\nWednesday = 3\nThursday = 4\nFriday = 5\nSaturday = 6\nThis date is on a:"); System.out.println(d0); Basically, this code was at first for use with the console, and now I want to implement it into a Swing GUI app. I'm only a week into learning Java, so excuse me if the problem is obvious or easy to fix... But can anyone figure out how to work it? Thanks!

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  • Basic example of placing two component on one JPanel container?

    - by Bernard
    Here is my code to add to component (JTextArea and JList) to a panel and put it on the frame. Can I divide half/half by BorderLayout? If yes why mine looks messy one stays up one down? What is the other alternative? Regards, Bernard import java.awt.*; import javax.swing.BorderFactory; import javax.swing.border.Border; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.JPanel; import javax.swing.JFrame; import javax.swing.JTextArea; public class SimpleBorder { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setSize(500,500); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Border etched = (Border) BorderFactory.createEtchedBorder(); String[] items = {"A", "B", "C", "D"}; JList list = new JList(items); JTextArea text = new JTextArea(10, 40); JScrollPane scrol = new JScrollPane(text); JScrollPane scrol2 = new JScrollPane(list); JPanel panel= new JPanel(); panel.add(scrol2,BorderLayout.WEST); panel.add(scrol, BorderLayout.EAST); panel.setBorder(etched); frame.add(panel); frame.setVisible(true); } }

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  • Swing: How do I run a job from AWT thread, but after a window was layed out?

    - by java.is.for.desktop
    My complete GUI runs inside the AWT thread, because I start the main window using SwingUtilities.invokeAndWait(...). Now I have a JDialog which has just to display a JLabel, which indicates that a certain job is in progress, and close that dialog after the job was finished. The problem is: the label is not displayed. That job seems to be started before JDialog was fully layed-out. When I just let the dialog open without waiting for a job and closing, the label is displayed. The last thing the dialog does in its ctor is setVisible(true). Things such as revalidate(), repaint(), ... don't help either. Even when I start a thread for the monitored job, and wait for it using someThread.join() it doesn't help, because the current thread (which is the AWT thread) is blocked by join, I guess. Replacing JDialog with JFrame doesn't help either. So, is the concept wrong in general? Or can I manage it to do certain job after it is ensured that a JDialog (or JFrame) is fully layed-out? Simplified algorithm of what I'm trying to achieve: Create a subclass of JDialog Ensure that it and its contents are fully layed-out Start a process and wait for it to finish (threaded or not, doesn't matter) Close the dialog I managed to write a reproducible test case: EDIT Problem from an answer is now addressed: This use case does display the label, but it fails to close after the "simulated process", because of dialog's modality. import java.awt.*; import javax.swing.*; public class _DialogTest2 { public static void main(String[] args) throws Exception { SwingUtilities.invokeAndWait(new Runnable() { final JLabel jLabel = new JLabel("Please wait..."); @Override public void run() { JFrame myFrame = new JFrame("Main frame"); myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); myFrame.setSize(750, 500); myFrame.setLocationRelativeTo(null); myFrame.setVisible(true); JDialog d = new JDialog(myFrame, "I'm waiting"); d.setModalityType(Dialog.ModalityType.APPLICATION_MODAL); d.add(jLabel); d.setSize(300, 200); d.setLocationRelativeTo(null); d.setVisible(true); SwingUtilities.invokeLater(new Runnable() { @Override public void run() { try { Thread.sleep(3000); // simulate process jLabel.setText("Done"); } catch (InterruptedException ex) { } } }); d.setVisible(false); d.dispose(); myFrame.setVisible(false); myFrame.dispose(); } }); } }

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  • How do I ensure that a JPanel Shrinks when the parent frame is resized?

    - by dah
    I have a basic notes panel that I'm looking to shrink the width of when the parent jframe is resized but it isn't happening. I'm using nested gridbaglayouts. package com.protocase.notes.views; import com.protocase.notes.controller.NotesController; import com.protocase.notes.model.Subject; import com.protocase.notes.model.Note; import com.protocase.notes.model.database.PMSNotesAdapter; import java.awt.Color; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; /** * @author DavidH */ public class NotesViewer extends JPanel { // <editor-fold defaultstate="collapsed" desc="Attributes"> private Subject subject; private NotesController controller; //</editor-fold> // <editor-fold defaultstate="collapsed" desc="Getters N' Setters"> /** * Gets back the current subject. * @return */ public Subject getSubject() { return subject; } public NotesController getController() { return controller; } public void setController(NotesController controller) { this.controller = controller; } /** * Should clear the panel of the current subject and load the details for * the other object. * @param subject */ public void setSubject(Subject subject) { this.subject = subject; } //</editor-fold> // <editor-fold defaultstate="collapsed" desc="Constructor"> /** * -- Sets up a note viewer with a subject and a controller. Likely this * would be the constructor used if you were passing off from another * NoteViewer or something else that used a notes adapter or controller. * @param subject * @param controller */ public NotesViewer(Subject subject, NotesController controller) { this.subject = subject; this.controller = controller; initComponents(); } /** * -- Sets up a note view with a subject and creates a new controller. This * would be the constructor typically chosen if choosing notes was * infrequent and only one or two notes needs to be displayed. * @param subject */ public NotesViewer(Subject subject) { this(subject, new NotesController(new PMSNotesAdapter())); } /** * -- Sets up a note view without a subject and creates a new controller. * This would be for a note viewer without any notes, perhaps populating * as you choose values in another form. * @param subject */ public NotesViewer() { this(null); } //</editor-fold> // <editor-fold defaultstate="collapsed" desc="initComponents()"> /** * Sets up the view for the NotesViewer */ private void initComponents() { // -- Make a new panel for the header JPanel panel = new JPanel(); panel.setLayout(new GridBagLayout()); GridBagConstraints c = new GridBagConstraints(); c.gridx = 0; c.fill = GridBagConstraints.HORIZONTAL; c.gridy = 0; c.weightx = .5; //c.anchor = GridBagConstraints.NORTHWEST; JLabel label = new JLabel("Viewing Notes for [Subject]"); label.setAlignmentX(JLabel.LEFT_ALIGNMENT); label.setBorder(BorderFactory.createLineBorder(Color.YELLOW)); panel.add(label); JButton newNoteButton = new JButton("New"); c = new GridBagConstraints(); // c.fill = GridBagConstraints.HORIZONTAL; c.gridx = 1; c.gridy = 0; c.weightx = .5; c.anchor = GridBagConstraints.EAST; panel.add(newNoteButton, c); // -- NotePanels c = new GridBagConstraints(); c.fill = GridBagConstraints.HORIZONTAL; c.weightx = 1; c.weighty = 1; c.gridx = 0; c.gridwidth = 2; int y = 1; for (Note n : subject.getNotes()) { c.gridy = y++; panel.add(new NotesPanel(n, controller), c); } this.setLayout(new GridBagLayout()); GridBagConstraints pc = new GridBagConstraints(); pc.gridx = 0; pc.gridy = 0; pc.weightx = 1; pc.weighty = 1; pc.fill = GridBagConstraints.BOTH; panel.setBackground(Color.blue); JScrollPane scroll = new JScrollPane(); scroll.setViewportView(panel); //scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); this.add(scroll, pc); //this.add(panel, pc); // -- Add it all to the layout } //</editor-fold> // <editor-fold defaultstate="collapsed" desc="private methods"> //</editor-fold> } package com.protocase.notes.views; import com.protocase.notes.controller.NotesController; import com.protocase.notes.model.Note; import java.awt.CardLayout; import java.awt.Color; import java.awt.Component; import java.awt.Dimension; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.text.DateFormat; import java.text.SimpleDateFormat; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.border.BevelBorder; import javax.swing.border.Border; import javax.swing.border.MatteBorder; /** * @author dah01 */ public class NotesPanel extends JPanel { // <editor-fold defaultstate="collapsed" desc="Attributes"> private Note note; private NotesController controller; private CardLayout cardLayout; private JTextArea viewTextArea; private JTextArea editTextArea; //</editor-fold> // <editor-fold defaultstate="collapsed" desc="Getters N' Setters"> public NotesController getController() { return controller; } public void setController(NotesController controller) { this.controller = controller; } public Note getNote() { return note; } public void setNote(Note note) { this.note = note; } //</editor-fold> // <editor-fold defaultstate="collapsed" desc="Constructor"> /** * Sets up a note panel that shows everything about the note. * @param note */ public NotesPanel(Note note, NotesController controller) { this.note = note; cardLayout = new CardLayout(); this.setLayout(cardLayout); // -- Setup the layout manager. this.setBackground(new Color(199, 187, 192)); this.setBorder(new BevelBorder(BevelBorder.RAISED)); // -- ViewPanel this.add("ViewPanel", initViewPanel()); this.add("EditPanel", initEditPanel()); } //</editor-fold> // <editor-fold defaultstate="collapsed" desc="EditPanel"> private JPanel initEditPanel() { JPanel editPanel = new JPanel(); editPanel.setLayout(new GridBagLayout()); GridBagConstraints c = new GridBagConstraints(); c.fill = GridBagConstraints.HORIZONTAL; c.gridy = 0; c.weightx = 1; c.weighty = 0.3; editPanel.add(initCreatorLabel(), c); c.gridy++; editPanel.add(initEditTextScroll(), c); c.gridy++; c.anchor = GridBagConstraints.WEST; c.fill = GridBagConstraints.NONE; editPanel.add(initEditorLabel(), c); c.gridx++; c.anchor = GridBagConstraints.EAST; editPanel.add(initSaveButton(), c); return editPanel; } private JScrollPane initEditTextScroll() { this.editTextArea = new JTextArea(note.getContents()); editTextArea.setLineWrap(true); editTextArea.setWrapStyleWord(true); JScrollPane scrollPane = new JScrollPane(editTextArea); scrollPane.setAlignmentX(JScrollPane.LEFT_ALIGNMENT); Border b = scrollPane.getViewportBorder(); MatteBorder mb = BorderFactory.createMatteBorder(2, 2, 2, 2, Color.BLUE); scrollPane.setBorder(mb); return scrollPane; } private JButton initSaveButton() { final CardLayout l = this.cardLayout; final JPanel p = this; final NotesController c = this.controller; final Note n = this.note; final JTextArea noteText = this.viewTextArea; final JTextArea textToSubmit = this.editTextArea; ActionListener al = new ActionListener() { @Override public void actionPerformed(ActionEvent e) { //controller.saveNote(n); noteText.setText(textToSubmit.getText()); l.next(p); } }; JButton saveButton = new JButton("Save"); saveButton.addActionListener(al); saveButton.setPreferredSize(new Dimension(62, 26)); return saveButton; } //</editor-fold> // <editor-fold defaultstate="collapsed" desc="ViewPanel"> private JPanel initViewPanel() { JPanel viewPanel = new JPanel(); viewPanel.setLayout(new GridBagLayout()); GridBagConstraints c = new GridBagConstraints(); c.fill = GridBagConstraints.HORIZONTAL ; c.gridy = 0; c.weightx = 1; c.weighty = 0.3; viewPanel.add(initCreatorLabel(), c); c.gridy++; viewPanel.add(this.initNoteTextArea(), c); c.fill = GridBagConstraints.NONE; c.anchor = GridBagConstraints.WEST; c.gridy++; viewPanel.add(initEditorLabel(), c); c.gridx++; c.anchor = GridBagConstraints.EAST; viewPanel.add(initEditButton(), c); return viewPanel; } private JLabel initCreatorLabel() { DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd"); if (note != null) { String noteBy = "Note by " + note.getCreator(); String noteCreated = formatter.format(note.getDateCreated()); JLabel creatorLabel = new JLabel(noteBy + " @ " + noteCreated); creatorLabel.setAlignmentX(JLabel.LEFT_ALIGNMENT); return creatorLabel; } else { System.out.println("NOTE IS NULL"); return null; } } private JScrollPane initNoteTextArea() { // -- Setup the notes area. this.viewTextArea = new JTextArea(note.getContents()); viewTextArea.setEditable(false); viewTextArea.setLineWrap(true); viewTextArea.setWrapStyleWord(true); JScrollPane scrollPane = new JScrollPane(viewTextArea); scrollPane.setAlignmentX(JScrollPane.LEFT_ALIGNMENT); return scrollPane; } private JLabel initEditorLabel() { // -- Setup the edited by label. JLabel editorLabel = new JLabel(" -- Last edited by " + note.getLastEdited() + " at " + note.getDateModified()); editorLabel.setAlignmentX(Component.LEFT_ALIGNMENT); return editorLabel; } private JButton initEditButton() { final CardLayout l = this.cardLayout; final JPanel p = this; ActionListener ar = new ActionListener() { @Override public void actionPerformed(ActionEvent e) { l.next(p); } }; JButton editButton = new JButton("Edit"); editButton.setPreferredSize(new Dimension(62,26)); editButton.addActionListener(ar); return editButton; } //</editor-fold> // <editor-fold defaultstate="collapsed" desc="Grow Width When Resized"> @Override public Dimension getPreferredSize() { int fw = this.getParent().getSize().width; int fh = super.getPreferredSize().height; return new Dimension(fw,fh); } //</editor-fold> }

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  • Who does code coverage testing?

    - by Athiruban
    Recently, I was given an opportunity to increase the code coverage in a project based on Java Swing, MySQL and other technologies. They told me to bring the code coverage to 100%, while it was only 45% at the time I joined. I am just starting, not a professional developer, right from the beginning I felt bad even though I write and understand computer programs well. (The developed code contains a lot of technical stuff like Generics and no documentation about the code is available.) Has anyone experienced the same situation before? Please tell who is the right person to do the job.

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  • fast java2d translucency

    - by mdriesen
    I'm trying to draw a bunch of translucent circles on a Swing JComponent. This isn't exactly fast, and I was wondering if there is a way to speed it up. My custom JComponent has the following paintComponent method: public void paintComponent(Graphics g) { Rectangle view = g.getClipBounds(); VolatileImage image = createVolatileImage(view.width, view.height); Graphics2D buffer = image.createGraphics(); // translate to camera location buffer.translate(-cx, -cy); // renderables contains all currently visible objects for(Renderable r : renderables) { r.paint(buffer); } g.drawImage(image.getSnapshot(), view.x, view.y, this); } The paint method of my circles is as follows: public void paint(Graphics2D graphics) { graphics.setPaint(paint); graphics.fillOval(x, y, radius, radius); } The paint is just an rgba color with a < 255: Color(int r, int g, int b, int a) It works fast enough for opaque objects, but is there a simple way to speed this up for translucent ones?

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  • MouseMotionListener inside JTable

    - by Harish
    I am trying to add MouseMotion event to the label and move it based on the dragging of the mouse and make it move along with my mouse.However the mousemotion is very difficult to control making this action not usable. Here is the code import java.awt.Color; import java.awt.Component; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.SwingConstants; import javax.swing.SwingUtilities; import javax.swing.table.DefaultTableCellRenderer; import javax.swing.table.DefaultTableModel; public class TableTest { public TableTest() { String[] columnNames = { "FileName", "Integer" }; Object[][] data = { { new FileName("AAA.jpg", Color.YELLOW), new Integer(2) }, { new FileName("BBB.png", Color.GREEN), new FileName("BBB.png", Color.GREEN) }, { new FileName("CCC.jpg", Color.RED), new Integer(-1) }, }; DefaultTableModel model = new DefaultTableModel(data, columnNames) { public Class getColumnClass(int column) { System.out.println("column is" + column); return getValueAt(0, column).getClass(); } }; JTable table = new JTable(model); //JTable table = new JTable(data, columnNames); table.setDefaultRenderer(FileName.class, new FileNameCellRenderer()); final JLabel label = new JLabel("TESTING", SwingConstants.CENTER); label.setBackground(java.awt.Color.RED); label.setBounds(450, 100, 90, 20); label.setOpaque(true); label.setVisible(true); label.addMouseMotionListener(new MouseMotionListener() { public void mouseDragged(MouseEvent arg0) { label.setBounds(arg0.getX(), arg0.getY(), 90, 20); } public void mouseMoved(MouseEvent arg0) { // TODO Auto-generated method stub } }); table.add(label); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(table); frame.setSize(800, 600); frame.setLocationRelativeTo(null); frame.setVisible(true); } static class FileNameCellRenderer extends DefaultTableCellRenderer { public Component getTableCellRendererComponent(JTable table, Object v, boolean isSelected, boolean hasFocus, int row, int column) { super.getTableCellRendererComponent(table, v, isSelected, hasFocus, row, column); FileName fn = (FileName) v; setBorder(BorderFactory.createMatteBorder(0, 60, 0, 0, new java.awt.Color(143, 188, 143))); return this; } } static class FileName { public final Color color; public final String label; FileName(String l, Color c) { this.label = l; this.color = c; } public String toString() { return label; } } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { new TableTest(); } }); } } I just want to make the label follow the label follow my mouse and the label should be attached to the table.Is there an easy way than this.

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