Eclipse Community Forums: Visual Editor (VE)

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Fri, 31 March 2006 12:53

Eclipse User

Originally posted by: adoneNOSPAMborione.cantv.net

Hi all

I would like to ask if there is some tutorial on VE for me to start do
some coding.

I tried to open the examples "SimpleTextEditor" (file->new->example) but
the example only shows a skeleton class with almost no code.

A comment says "An example which shows off a functional simple text
editor. Includes a variety of events." but I can't see anything useful

So, how do I learn more?

Are there online courses?

Thanks
Adone

Re: novice [message #121249 is a reply to message #121232]

Fri, 31 March 2006 13:21

Eclipse User

Hmmm, there may be something wrong with your installation if you're not
getting the contents of the Examples. Check the error log by going to
Window->Show View->Other->PDE Runtime->Error log

Below is the code I get when I try the SimpleTextEditor example:

import javax.swing.JFrame;
import java.io.*;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

/**
* An example which shows off a functional simple text editor.
Includes a variety of events.
*/
public class SimpleTextEditor extends JFrame {

private javax.swing.JPanel jContentPane = null;

private javax.swing.JPanel jPanel = null;

private javax.swing.JButton jButton = null;

private javax.swing.JButton jButton1 = null;

private javax.swing.JButton jButton2 = null;

private javax.swing.JScrollPane jScrollPane = null;

private javax.swing.JTextArea jTextArea = null;

private javax.swing.JFileChooser jFileChooser = null; //
@jve:visual-info decl-index=0 visual-constraint="582,36"

private boolean hasChanged = false;

private static final String title = "Simple Text Editor";

/**
* This method initializes
*
*/
public SimpleTextEditor() {
super();
initialize();
}

public static void main(String[] args) {
SimpleTextEditor ste = new SimpleTextEditor();
ste.show();
}

/**
* This method initializes jContentPane
*
* @return javax.swing.JPanel
*/
private javax.swing.JPanel getJContentPane() {
if (jContentPane == null) {
jContentPane = new javax.swing.JPanel();
jContentPane.setLayout(new java.awt.BorderLayout());
jContentPane.add(getJPanel(), java.awt.BorderLayout.SOUTH);
jContentPane.add(getJScrollPane(), java.awt.BorderLayout.CENTER);
jContentPane.setBorder(javax.swing.BorderFactory.createEmpty Border(
5, 5, 5, 5));
}
return jContentPane;
}

/**
* This method initializes this
*
* @return void
*/
private void initialize() {
this.setContentPane(getJContentPane());
this.setSize(480, 284);
this.setTitle(title);
this

..setDefaultCloseOperation(javax.swing.WindowConstants.DO_NO THING_ON_CLOSE);
this.addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent e) {
doExit();
}
});

}

/**
* This method initializes jPanel
*
* @return javax.swing.JPanel
*/
private javax.swing.JPanel getJPanel() {
if (jPanel == null) {
jPanel = new javax.swing.JPanel();
jPanel.add(getJButton(), null);
jPanel.add(getJButton1(), null);
jPanel.add(getJButton2(), null);
}
return jPanel;
}

/**
* This method initializes jButton
*
* @return javax.swing.JButton
*/
private javax.swing.JButton getJButton() {
if (jButton == null) {
jButton = new javax.swing.JButton();
jButton.setText("Load File");
jButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
loadFile();
}
});
}
return jButton;
}

/**
* This method initializes jButton1
*
* @return javax.swing.JButton
*/
private javax.swing.JButton getJButton1() {
if (jButton1 == null) {
jButton1 = new javax.swing.JButton();
jButton1.setText("Save File");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
saveFile();
}
});
}
return jButton1;
}

/**
* This method initializes jButton2
*
* @return javax.swing.JButton
*/
private javax.swing.JButton getJButton2() {
if (jButton2 == null) {
jButton2 = new javax.swing.JButton();
jButton2.setText("Exit");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
doExit();
}
});
}
return jButton2;
}

/**
* This method initializes jScrollPane
*
* @return javax.swing.JScrollPane
*/
private javax.swing.JScrollPane getJScrollPane() {
if (jScrollPane == null) {
jScrollPane = new javax.swing.JScrollPane();
jScrollPane.setViewportView(getJTextArea());
}
return jScrollPane;
}

/**
* This method initializes jTextArea
*
* @return javax.swing.JTextArea
*/
private javax.swing.JTextArea getJTextArea() {
if (jTextArea == null) {
jTextArea = new javax.swing.JTextArea();
jTextArea.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyTyped(java.awt.event.KeyEvent e) {
if (!hasChanged) {
setTitle(title + " *");
hasChanged = true;
}
}
});
}
return jTextArea;
}

/**
* This method initializes jFileChooser
*
* @return javax.swing.JFileChooser
*/
private javax.swing.JFileChooser getJFileChooser() {
if (jFileChooser == null) {
jFileChooser = new javax.swing.JFileChooser();
jFileChooser.setMultiSelectionEnabled(false);
}
return jFileChooser;
}

private void loadFile() {
int state = getJFileChooser().showOpenDialog(this);
if (state == JFileChooser.APPROVE_OPTION) {
File f = getJFileChooser().getSelectedFile();
try {
BufferedReader br = new BufferedReader(new FileReader(f));
getJTextArea().read(br, null);
br.close();
setTitle(title);
hasChanged = false;
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}

private void saveFile() {
int state = getJFileChooser().showSaveDialog(this);
if (state == JFileChooser.APPROVE_OPTION) {
File f = getJFileChooser().getSelectedFile();
try {
BufferedWriter bw = new BufferedWriter(new FileWriter(f));
getJTextArea().write(bw);
bw.close();
setTitle(title);
hasChanged = false;
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}

private void doExit() {
if (hasChanged) {
int state = JOptionPane.showConfirmDialog(this,
"File has been changed. Save before exit?");
if (state == JOptionPane.YES_OPTION) {
saveFile();
} else if (state == JOptionPane.CANCEL_OPTION) {
return;
}
}
System.exit(0);
}
} // @jve:visual-info decl-index=0 visual-constraint="20,27"

Re: novice [message #121256 is a reply to message #121249]

Fri, 31 March 2006 13:31

Eclipse User

Originally posted by: adoneNOSPAMborione.cantv.net

There is the following messages but I do not think are related to the
examples

eclipse.buildId=I20060223-1656
java.version=1.5.0_06
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=es_VE
Command-line arguments: -os win32 -ws win32 -arch x86

Error
2006-03-29 13:08:52.593
Unable to access site:
"http://http://update.eclipse.org/tools/ve/updates/1.0/" [http]

java.net.UnknownHostException: http
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Nativ e Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknow n Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Un known
Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedExcept ion(Unknown
Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(U nknown
Source)
at
org.eclipse.update.internal.core.connection.ConnectionThread Manager$StreamRunnable.run(ConnectionThreadManager.java:97)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.UnknownHostException: http
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient (Unknown
Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unk nown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(U nknown
Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at
org.eclipse.update.internal.core.connection.HttpResponse.get StatusCode(HttpResponse.java:183)
at
org.eclipse.update.internal.core.UpdateManagerUtils.checkCon nectionResult(UpdateManagerUtils.java:553)
at
org.eclipse.update.internal.core.SiteURLFactory.createSite(S iteURLFactory.java:74)
at
org.eclipse.update.internal.core.InternalSiteManager.createS ite(InternalSiteManager.java:332)
at
org.eclipse.update.internal.core.InternalSiteManager.createS ite(InternalSiteManager.java:324)
at
org.eclipse.update.internal.core.InternalSiteManager.createS ite(InternalSiteManager.java:296)
at
org.eclipse.update.internal.core.InternalSiteManager.attempt CreateSite(InternalSiteManager.java:220)
at
org.eclipse.update.internal.core.InternalSiteManager.getSite (InternalSiteManager.java:161)
at org.eclipse.update.core.SiteManager.getSite(SiteManager.java :78)
at
org.eclipse.update.search.UpdateSearchRequest.searchOneSite( UpdateSearchRequest.java:345)
at
org.eclipse.update.search.UpdateSearchRequest.performSearch( UpdateSearchRequest.java:273)
at org.eclipse.update.ui.UpdateJob.runSearchForNew(UpdateJob.ja va:180)
at org.eclipse.update.ui.UpdateJob.run(UpdateJob.java:168)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:58)

Jeff Myers wrote:

> Hmmm, there may be something wrong with your installation if you're not
> getting the contents of the Examples. Check the error log by going to
> Window->Show View->Other->PDE Runtime->Error log

> Below is the code I get when I try the SimpleTextEditor example:

> import javax.swing.JFrame;
> import java.io.*;
> import javax.swing.JFileChooser;
> import javax.swing.JOptionPane;

> /**
> * An example which shows off a functional simple text editor.
> Includes a variety of events.
> */
> public class SimpleTextEditor extends JFrame {

> private javax.swing.JPanel jContentPane = null;

> private javax.swing.JPanel jPanel = null;

> private javax.swing.JButton jButton = null;

> private javax.swing.JButton jButton1 = null;

> private javax.swing.JButton jButton2 = null;

> private javax.swing.JScrollPane jScrollPane = null;

> private javax.swing.JTextArea jTextArea = null;

> private javax.swing.JFileChooser jFileChooser = null; //
> @jve:visual-info decl-index=0 visual-constraint="582,36"

> private boolean hasChanged = false;

> private static final String title = "Simple Text Editor";

> /**
> * This method initializes
> *
> */
> public SimpleTextEditor() {
> super();
> initialize();
> }

> public static void main(String[] args) {
> SimpleTextEditor ste = new SimpleTextEditor();
> ste.show();
> }

> /**
> * This method initializes jContentPane
> *
> * @return javax.swing.JPanel
> */
> private javax.swing.JPanel getJContentPane() {
> if (jContentPane == null) {
> jContentPane = new javax.swing.JPanel();
> jContentPane.setLayout(new java.awt.BorderLayout());
> jContentPane.add(getJPanel(), java.awt.BorderLayout.SOUTH);
> jContentPane.add(getJScrollPane(), java.awt.BorderLayout.CENTER);
> jContentPane.setBorder(javax.swing.BorderFactory.createEmpty Border(
> 5, 5, 5, 5));
> }
> return jContentPane;
> }

> /**
> * This method initializes this
> *
> * @return void
> */
> private void initialize() {
> this.setContentPane(getJContentPane());
> this.setSize(480, 284);
> this.setTitle(title);
> this

> ..setDefaultCloseOperation(javax.swing.WindowConstants.DO_NO THING_ON_CLOSE);
> this.addWindowListener(new java.awt.event.WindowAdapter() {
> public void windowClosing(java.awt.event.WindowEvent e) {
> doExit();
> }
> });

> }

> /**
> * This method initializes jPanel
> *
> * @return javax.swing.JPanel
> */
> private javax.swing.JPanel getJPanel() {
> if (jPanel == null) {
> jPanel = new javax.swing.JPanel();
> jPanel.add(getJButton(), null);
> jPanel.add(getJButton1(), null);
> jPanel.add(getJButton2(), null);
> }
> return jPanel;
> }

> /**
> * This method initializes jButton
> *
> * @return javax.swing.JButton
> */
> private javax.swing.JButton getJButton() {
> if (jButton == null) {
> jButton = new javax.swing.JButton();
> jButton.setText("Load File");
> jButton.addActionListener(new java.awt.event.ActionListener() {
> public void actionPerformed(java.awt.event.ActionEvent e) {
> loadFile();
> }
> });
> }
> return jButton;
> }

> /**
> * This method initializes jButton1
> *
> * @return javax.swing.JButton
> */
> private javax.swing.JButton getJButton1() {
> if (jButton1 == null) {
> jButton1 = new javax.swing.JButton();
> jButton1.setText("Save File");
> jButton1.addActionListener(new java.awt.event.ActionListener() {
> public void actionPerformed(java.awt.event.ActionEvent e) {
> saveFile();
> }
> });
> }
> return jButton1;
> }

> /**
> * This method initializes jButton2
> *
> * @return javax.swing.JButton
> */
> private javax.swing.JButton getJButton2() {
> if (jButton2 == null) {
> jButton2 = new javax.swing.JButton();
> jButton2.setText("Exit");
> jButton2.addActionListener(new java.awt.event.ActionListener() {
> public void actionPerformed(java.awt.event.ActionEvent e) {
> doExit();
> }
> });
> }
> return jButton2;
> }

> /**
> * This method initializes jScrollPane
> *
> * @return javax.swing.JScrollPane
> */
> private javax.swing.JScrollPane getJScrollPane() {
> if (jScrollPane == null) {
> jScrollPane = new javax.swing.JScrollPane();
> jScrollPane.setViewportView(getJTextArea());
> }
> return jScrollPane;
> }

> /**
> * This method initializes jTextArea
> *
> * @return javax.swing.JTextArea
> */
> private javax.swing.JTextArea getJTextArea() {
> if (jTextArea == null) {
> jTextArea = new javax.swing.JTextArea();
> jTextArea.addKeyListener(new java.awt.event.KeyAdapter() {
> public void keyTyped(java.awt.event.KeyEvent e) {
> if (!hasChanged) {
> setTitle(title + " *");
> hasChanged = true;
> }
> }
> });
> }
> return jTextArea;
> }

> /**
> * This method initializes jFileChooser
> *
> * @return javax.swing.JFileChooser
> */
> private javax.swing.JFileChooser getJFileChooser() {
> if (jFileChooser == null) {
> jFileChooser = new javax.swing.JFileChooser();
> jFileChooser.setMultiSelectionEnabled(false);
> }
> return jFileChooser;
> }

> private void loadFile() {
> int state = getJFileChooser().showOpenDialog(this);
> if (state == JFileChooser.APPROVE_OPTION) {
> File f = getJFileChooser().getSelectedFile();
> try {
> BufferedReader br = new BufferedReader(new FileReader(f));
> getJTextArea().read(br, null);
> br.close();
> setTitle(title);
> hasChanged = false;
> } catch (FileNotFoundException e1) {
> e1.printStackTrace();
> } catch (IOException e1) {
> e1.printStackTrace();
> }
> }
> }

> private void saveFile() {
> int state = getJFileChooser().showSaveDialog(this);
> if (state == JFileChooser.APPROVE_OPTION) {
> File f = getJFileChooser().getSelectedFile();
> try {
> BufferedWriter bw = new BufferedWriter(new FileWriter(f));
> getJTextArea().write(bw);
> bw.close();
> setTitle(title);
> hasChanged = false;
> } catch (FileNotFoundException e1) {
> e1.printStackTrace();
> } catch (IOException e1) {
> e1.printStackTrace();
> }
> }
> }

> private void doExit() {
> if (hasChanged) {
> int state = JOptionPane.showConfirmDialog(this,
> "File has been changed. Save before exit?");
> if (state == JOptionPane.YES_OPTION) {
> saveFile();
> } else if (state == JOptionPane.CANCEL_OPTION) {
> return;
> }
> }
> System.exit(0);
> }
> } // @jve:visual-info decl-index=0 visual-constraint="20,27"

Re: novice [message #121281 is a reply to message #121256]

Sat, 01 April 2006 11:25

Eclipse User

You need to take out that extra http:// in the update site url of the VE project//

Re: novice [message #121289 is a reply to message #121281]

Sat, 01 April 2006 12:44

Eclipse User

Originally posted by: adoneNOSPAMborione.cantv.net

Thanks Fred but I have done it and the update manager does not report any
update available.

How do I reinstall the examples?

Fred Grott wrote:

> You need to take out that extra http:// in the update site url of the VE
project//

Re: novice [message #121337 is a reply to message #121289]

Sat, 01 April 2006 20:33

Eclipse User

Originally posted by: adoneNOSPAMborione.cantv.net

I got it!

At last I understood the philosophy of eclipse and its plugins!

I was able to create different installs of different versions. I
understood also what release and stream mean.

I understood that I cannot use update manager unless I am using a release
version.

EUREKA!!

I MADE IT!!!

Re: novice [message #612412 is a reply to message #121232]

Fri, 31 March 2006 13:21

Eclipse User