Help with creating a custom component.

Hi. I have created a really simple custom component called
myComp. It is a simple Canvas 100 pixels x 100 pixels with an Image
control component.
<mx:Canvas>
<mx:Image id="image1">
</mx:Canvas>
After instantiating the component in Main.mxml eg. var
pic1:myComp = new myComp(); I am having a problem setting the
source property of the Image component.
"image1" is the id of mx:Image in the custom compoenent so I
tried pic1.image1.source = "assets/ball.jpg" but I get a run time
error "Error #1009: Cannot access a property or method of a null
object reference".
Don't really know what I am doing wrong.
Any help please!

In your custom component, try adding a bindable public var
which contains the path to your image. Also, set the image.source
to this var.
In your main app, set the var within the <mx:> tags of
the custom component. Since it is a public var, it will show up in
the code hint. You can also now change the image var from the main
app anytime you like using ActionScript code.

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In your custom component, try adding a bindable public var
which contains the path to your image. Also, set the image.source
to this var.
In your main app, set the var within the <mx:> tags of
the custom component. Since it is a public var, it will show up in
the code hint. You can also now change the image var from the main
app anytime you like using ActionScript code.

Help with creating a custom table cell editor?

hi, i was reading up on various tutorials and trying to write codes that pops up a simple calendar when clicked on text of the Date class in a table, so far, i can't seem to get my classes working.. the following is some classes i've written for this task (note, there are alot of commented out lines, those are the modifications done to the tutorial classes in http://java.sun.com/docs/books/tutorial/)
any help would be appreciated :D
thanks in advance!
What i have done so far:
/** BASIC TABLE CLASS FOR DEMONSTRATION*/
//import java.awt.*;
import java.util.*;
import javax.swing.*;
public class TableBasic extends JFrame
     public TableBasic()
          String[] columnNames = { "Date", "String", "Integer", "Boolean" };
          Object[][] data =
               { { new Date(), "A", new Integer(1), Boolean.TRUE },
                    {new Date(), "B", new Integer(2), Boolean.FALSE },
                    {new Date(), "C", new Integer(9), Boolean.TRUE },
                    {new Date(), "D", new Integer(4), Boolean.FALSE}
          JTable table = new JTable(data, columnNames)
               //Returning the Class of each column will allow different
               //renderers to be used based on Class
               public Class getColumnClass(int column)
                    return getValueAt(0, column).getClass();
          table.setDefaultRenderer(Date.class, new CalendarRenderer(true));
          table.setDefaultEditor(Date.class, new CalendarEditor());
          table.setPreferredScrollableViewportSize(table.getPreferredSize());
          JScrollPane scrollPane = new JScrollPane(table);
          getContentPane().add(scrollPane);
     public static void main(String[] args)
          TableBasic frame = new TableBasic();
          frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
          frame.pack();
          //frame.setLocationRelativeTo(null);
          frame.setVisible(true);
* CLASS BASED ON ColorRenderer.java at http://java.sun.com/docs/books/tutorial/uiswing/components/example-1dot4/ColorRenderer.java
import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.border.Border;
import javax.swing.table.TableCellRenderer;
//import java.awt.Color;
import java.awt.Component;
public class CalendarRenderer
     extends JLabel
     implements TableCellRenderer
     Border unselectedBorder = null;
     Border selectedBorder = null;
     boolean isBordered = true;
     public CalendarRenderer(boolean isBordered)
          this.isBordered = isBordered; setOpaque(true);
          //MUST do this for background to show up.
     public Component getTableCellRendererComponent(JTable table,
                                                                 Object color,
                                                                 boolean isSelected,
                                                                 boolean hasFocus,
                                                                 int row,
                                                                 int column)
          String newDate = (String)color;
          setText(newDate);
          if (isBordered)
               if (isSelected)
                    if (selectedBorder == null)
                         selectedBorder = BorderFactory.createMatteBorder(2,5,2,5, table.getSelectionBackground());
                    setBorder(selectedBorder);
               else
                    if (unselectedBorder == null)
                         unselectedBorder = BorderFactory.createMatteBorder(2,5,2,5, table.getBackground());
                    setBorder(unselectedBorder);
          //setToolTipText("RGB value: " + newColor.getRed() + ", " + newColor.getGreen() + ", " + newColor.getBlue());
          return this;
* the editor based on ColorEditor.java at http://java.sun.com/docs/books/tutorial/uiswing/components/example-1dot4/ColorEditor.java
import javax.swing.AbstractCellEditor;
import javax.swing.table.TableCellEditor;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JDialog;
import javax.swing.JTable;
import java.awt.Color;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class ColorEditor
     extends AbstractCellEditor
     implements TableCellEditor, ActionListener
     Color currentColor;
     JButton button;
     JColorChooser colorChooser;
     JDialog dialog;
     protected static final String EDIT = "edit";
     public ColorEditor()
          //Set up the editor (from the table's point of view),
          //which is a button.
          //This button brings up the color chooser dialog,
          //which is the editor from the user's point of view.
          button = new JButton();
          button.setActionCommand(EDIT);
          button.addActionListener(this);
          button.setBorderPainted(false);
          //Set up the dialog that the button brings up.
          colorChooser = new JColorChooser();
          dialog = JColorChooser.createDialog(button,
               "Pick a Color",
               true, //modal
               colorChooser,
               this, //OK button handler
               null); //no CANCEL button handler
      * Handles events from the editor button and from
      * the dialog's OK button.
     public void actionPerformed(ActionEvent e)
          if (EDIT.equals(e.getActionCommand()))
               //The user has clicked the cell, so
               //bring up the dialog.
               button.setBackground(currentColor);
               colorChooser.setColor(currentColor);
               dialog.setVisible(true); //Make the renderer reappear.
               fireEditingStopped();
          else
               //User pressed dialog's "OK" button.
               currentColor = colorChooser.getColor();
     //Implement the one CellEditor method that AbstractCellEditor doesn't.
     public Object getCellEditorValue()
          return currentColor;
     //Implement the one method defined by TableCellEditor.
     public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column)
          currentColor = (Color)value; return button;
/** THE SIMPLE CALENDAR WRITTEN TALIORED TO WORK WITH DIALOGS*/
import javax.swing.*;
import java.util.Calendar;
import java.awt.*;
import java.awt.event.*;
import java.text.SimpleDateFormat;
//import java.beans.*; //property change stuff
public class CalendarDialog
     extends JDialog
     //implements PropertyChangeListener
     private JButton[] btn = new JButton[49];
     private int month = Calendar.getInstance().get(Calendar.MONTH);
     private int year = Calendar.getInstance().get(Calendar.YEAR);
     private JLabel lbl = new JLabel("", JLabel.CENTER);
     private JOptionPane optionPane;
     private String curDate = null;
     private JTextArea output = new JTextArea(curDate, 1, 20);
     private String btnString1 = "Enter";
     private String btnString2 = "Cancel";
     public CalendarDialog()
          //super(aFrame, true);
          setContentPane(buildGUI());
          setDates();
     public JPanel buildGUI()
          JPanel panel = new JPanel();
          String[] header = { "Sun", "Mon", "Tue", "Wed", "Thur", "Fri", "Sat" };
          JPanel midPanel = new JPanel(new GridLayout(7, 7));
          for (int x = 0; x < btn.length; x++)
               final int selection = x;
               btn[x] = new JButton();
               btn[x].setFocusPainted(false);
               if (x < 7)
                    JLabel lbl = new JLabel(header[x], JLabel.CENTER);
                    lbl.setFont(new Font("Lucida", Font.PLAIN, 10));
                    midPanel.add(lbl);
               else
                    btn[x].addActionListener(new ActionListener()
                         public void actionPerformed(ActionEvent ae)
                              displayDatePicked(btn[selection].getActionCommand());
                    midPanel.add(btn[x]);
          JPanel lowPanel = new JPanel(new GridLayout(1, 3));
          JButton prevBtn = new JButton("<< Previous");
          prevBtn.addActionListener(new ActionListener()
               public void actionPerformed(ActionEvent ae)
                    month--;
                    setDates();
          lowPanel.add(prevBtn);
          lowPanel.add(lbl);
          lowPanel.add(output);
          JButton nextBtn = new JButton("Next >>");
          nextBtn.addActionListener(new ActionListener()
               public void actionPerformed(ActionEvent ae)
                    month++;
                    setDates();
          lowPanel.add(nextBtn);
          JPanel outputPanel = new JPanel();
          Object[] options = { btnString1, btnString2 };
          optionPane =
               new JOptionPane(
                    output,
                    JOptionPane.QUESTION_MESSAGE,
                    JOptionPane.YES_NO_OPTION,
                    null,
                    options,
                    options[0]);
          outputPanel.add(optionPane);
          panel.setLayout(new BorderLayout());
          panel.add(lowPanel, BorderLayout.NORTH);
          panel.add(midPanel, BorderLayout.CENTER);
          panel.add(outputPanel, BorderLayout.SOUTH);
          return panel;
     public void setDates()
          for (int x = 7; x < btn.length; x++)
               btn[x].setText("");
          SimpleDateFormat sdf = new SimpleDateFormat("MMMM yyyy");
          Calendar cal = Calendar.getInstance();
          cal.set(year, month, 1);
          int dayOfWeek = cal.get(java.util.Calendar.DAY_OF_WEEK);
          int daysInMonth = cal.getActualMaximum(java.util.Calendar.DAY_OF_MONTH);
          for (int x = 6 + dayOfWeek, day = 1; day <= daysInMonth; x++, day++)
               btn[x].setText("" + day);
          lbl.setText(sdf.format(cal.getTime()));
     public void displayDatePicked(String day)
          if (day.equals("") == false)
               SimpleDateFormat sdf = new SimpleDateFormat("EEEE d MMMM, yyyy");
               Calendar cal = Calendar.getInstance();
               cal.set(year, month, Integer.parseInt(day));
               curDate = sdf.format(cal.getTime());
               //JOptionPane.showMessageDialog(this, "You picked " + sdf.format(cal.getTime()));
               output.setText(sdf.format(cal.getTime()));
     public String getDate()
          return curDate;
     public void setDate(String date)
          curDate = date;
}

well, i have indeed narrowed down my problem after some digging around.. one thing i discovered that i don't need CalendarRenderer.java.. and i found out i don't really know what does
//Implement the one method defined by TableCellEditor.
     public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column)
          curDate = (String)value; return button;
     }do, as it seems to be the problem:
java.lang.ClassCastException
     at CalendarEditor.getTableCellEditorComponent(CalendarEditor.java:78)
     at javax.swing.JTable.prepareEditor(JTable.java:3786)
     at javax.swing.JTable.editCellAt(JTable.java:2531)
     at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.adjustFocusAndSelection(BasicTableUI.java:510)
     at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.mousePressed(BasicTableUI.java:494)
     at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:222)
     at java.awt.Component.processMouseEvent(Component.java:5097)
     at java.awt.Component.processEvent(Component.java:4897)
     at java.awt.Container.processEvent(Container.java:1569)
     at java.awt.Component.dispatchEventImpl(Component.java:3615)
     at java.awt.Container.dispatchEventImpl(Container.java:1627)
     at java.awt.Component.dispatchEvent(Component.java:3477)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3195)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
     at java.awt.Container.dispatchEventImpl(Container.java:1613)
     at java.awt.Window.dispatchEventImpl(Window.java:1606)
     at java.awt.Component.dispatchEvent(Component.java:3477)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
mmm.. does anyone know what i should modify for that to work?

Please Help with Viewstack and custom component

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There seems to be a little confusion here. Think of it this way:
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HTH,
Carlos

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public static void main(String[] args) throws Exception {
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saveKey(args[0],publicKey);
saveKey(args[1],privateKey);
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pairGenerator.initialize(1024, new SecureRandom());
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ObjectOutputStream out= new ObjectOutputStream(new FileOutputStream(filename));
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out.close();
private synchronized static void saveKey(String filename,PublicKey key) throws Exception {
ObjectOutputStream out= new ObjectOutputStream( new FileOutputStream(filename));
out.writeObject(key);
out.close();
the public key is:
�� sr com.sun.rsajca.JSA_RSAPublicKeyrC�� xr com.sun.rsajca.JS_PublicKey~5< ~��% L thePublicKeyt Lcom/sun/rsasign/p;xpsr com.sun.rsasign.anm��9�[ [ at [B[ bq ~ xr com.sun.rsasign.p��(!g�� L at Ljava/lang/String;[ bt [Ljava/lang/String;xr com.sun.rsasign.c�"dyU�| xpt Javaur [Ljava.lang.String;��V��{G xp q ~ ur [B��T� xp ��ccR}o��[!#I��lo��
��^"`8�|��Z>��&
d ��"B��
^5��a��jw9��D��D�)�*3/h��7�|��I�d�$�4f�8_�|��yuq ~
How i can generated the key pairs in base 64 or binary????
Thanxs for help me
Luis Navarro Nu�ez
Santiago.
Chile.
South America.

I don't use ABA but BouncyCastle
this could help you :
try
java.security.Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
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java.security.KeyPair kp = kg.generateKeyPair();
java.security.Key pub = kp.getPublic();
java.security.Key pri = kp.getPrivate();
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System.out.println("pri: " + pri);
byte[] pub_e = pub.getEncoded();
byte[] pri_e = pri.getEncoded();
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java.io.DataInputStream i;
java.io.File f;
o = new java.io.PrintWriter(new java.io.FileOutputStream("d:/pub64"));
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o.close();
o = new java.io.PrintWriter(new java.io.FileOutputStream("d:/pri64"));
o.println(new sun.misc.BASE64Encoder().encode(pri_e));
o.close();
java.io.BufferedReader br = new java.io.BufferedReader(new java.io.FileReader("d:/pub64"));
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line = br.readLine ();
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Hey i need help with creating a quiz with scoring and all.
I need a helping hand so if you can get me started that
would help a lot.
Use the Question class to define a Quiz class. A
quiz can be composed of up to 25 questions. Define the add method
of the Quiz class to add a question to a quiz. Define the giveQuiz
method of the Quiz class to present each question in turn to the user,
accept an answer for each one, and keep track of the results. Define
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public Question (String query, String result)
question = query;
answer = result;
complexityLevel = 1;
// Sets the complexity level for this question.
public void setComplexity (int level)
complexityLevel = level;
// Returns the complexity level for this question.
public int getComplexity()
return complexityLevel;
// Returns the question.
public String getQuestion()
return question;
// Returns the answer to this question.
public String getAnswer()
return answer;
// Returns true if the candidate answer matches the answer.
public boolean answerCorrect (String candidateAnswer)
return answer.equals(candidateAnswer);
// Returns this question (and its answer) as a string.
public String toString()
return question + "\n" + answer;
}

Do you know why this lazy fart-ass is back? Because when he posted his homework last week, some sorry-assed idiot went and did it for him.
http://forum.java.sun.com/thread.jspa?threadID=5244564&messageID=10008358#10008358
He didn't even thank the poster.
It's the same problem over and over again. You feed the bears and it only teaches them to come back for handouts.
My polite suggestion to the original poster: please do your own fucking homework.

Need help with creating a brush

Hi guys,
I wanted to ask for help with creating a brush (even a link to a tutorial will be goon enough ).
I got this sample:
I've created a brush from it, and i'm trying to get this kind of result:
but it's only duplicates it and gives me this result:
Can someone help me please understand what i need to define in order to make the brush behave like a continues brush instead of duplicate it?
Thank you very much
shlomit

what you need to do is make a brush that looks like the tip of a brush. photoshop has several already but you can make your own that will be better.
get a paintbrush and paint a spot kind of like what you did but dont paint a stroke. make it look kindof grungy. then make your brush from that, making sure to desaturate it and everything.
EDIT:
oh, and if you bring the fill down to like 10-20% your stroke will look better

I need help with creating PDF with Preview...

Hello
I need help with creating PDF documetns with Preview. Just a few days ago, I was able to create PDF files composed of scanned images (notes) and everything worked perfectly fine. However, today I was having trouble with it. I scanned my notebook and saved 8 images/pages in jpeg format. I did the usual routine with Preview (select all files>print>PDF>save as PDF>then save). Well this worked a few days ago, but when I tried it today, I was able to save it, but the after opening the PDF file that I have saved, only the first page was there. The other pages weren't included. I really don't see anything wrong with what I'm doing. I really need help. Any help would be greatly appreciated.

I can't find it. I went into advanced and then document processing but no batch sequence is there and everything is grayed out.
EDIT: I realized that you cant do batch sequences in standard. Any other ideas?

I need help with creating some formulas

I'm not sure if anyone around here can help me, but I'm trying to create a Numbers document and need some help with creating a formula/function.
I have a column of amounts and I would like to create a formula which deducts a percentage (11.9%) and puts the result in another column.
If anyone can help me, it would be greatly appreciated.

Here is an example that shows one way to do this:
The original data is in column A. In column B we will store formulas to adjust the amounts:
1) select the cell where you want to formula (in this case cell B2)
2) Type the "=" (equal sign):
3) click cell A2:
4) now type the rest of the formula which is: "*(100-11.9)/100" that is asterisk, then open parenthesis, 100 minus eleven point nine close parenthesis forward slash one hundred
The Asterisk is the multiply operator (times) and the forward slash is the division operator (divide)
now hit return. select cell B2 and hover the cursor over the bottom edge of the cell:
drag the little yellow dot down to "fill" the formula down as needed.

Help with creating a custom component.

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