Admin: 1 версия

2010-06-01T05:53:55Z

1 версия

в 18:01, 31 мая 2010

2010-05-31T18:01:43Z

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== DirectoryDialog: prompt for a directory ==



<source lang="java">

/*
* DirectoryDialog example snippet: prompt for a directory
*
* For a list of all SWT example snippets see
* http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
*/
import org.eclipse.swt.widgets.DirectoryDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class Snippet33 {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.open();
DirectoryDialog dialog = new DirectoryDialog(shell);
dialog.setFilterPath("c:\\"); // Windows specific
System.out.println("RESULT=" + dialog.open());
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}

</source>



== Dir File Selection ==



<source lang="java">
/******************************************************************************
* All Right Reserved.
* Copyright (c) 1998, 2004 Jackwind Li Guojie
*
* Created on Mar 16, 2004 10:18:50 PM by JACK
* $Id$
*
*****************************************************************************/

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.DirectoryDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
public class DirFileSelection {
Display display = new Display();
Shell shell = new Shell(display);

// the label used to display selected dir/file.
Label label;

Button buttonSelectDir;
Button buttonSelectFile;

String selectedDir;
String fileFilterPath = "F:/jdk1.5";
public DirFileSelection() {
label = new Label(shell, SWT.BORDER | SWT.WRAP);
label.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
label.setText("Select a dir/file by clicking the buttons below.");

buttonSelectDir = new Button(shell, SWT.PUSH);
buttonSelectDir.setText("Select a directory");
buttonSelectDir.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
DirectoryDialog directoryDialog = new DirectoryDialog(shell);

directoryDialog.setFilterPath(selectedDir);
directoryDialog.setMessage("Please select a directory and click OK");

String dir = directoryDialog.open();
if(dir != null) {
label.setText("Selected dir: " + dir);
selectedDir = dir;
}
}
});

buttonSelectFile = new Button(shell, SWT.PUSH);
buttonSelectFile.setText("Select a file/multiple files");
buttonSelectFile.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
FileDialog fileDialog = new FileDialog(shell, SWT.MULTI);
fileDialog.setFilterPath(fileFilterPath);

fileDialog.setFilterExtensions(new String[]{"*.rtf", "*.html", "*.*"});
fileDialog.setFilterNames(new String[]{ "Rich Text Format", "HTML Document", "Any"});

String firstFile = fileDialog.open();
if(firstFile != null) {
fileFilterPath = fileDialog.getFilterPath();
String[] selectedFiles = fileDialog.getFileNames();
StringBuffer sb = new StringBuffer("Selected files under dir " + fileDialog.getFilterPath() + ": \n");
for(int i=0; i<selectedFiles.length; i++) {
sb.append(selectedFiles[i] + "\n");
}
label.setText(sb.toString());
}
}
});

label.setBounds(0, 0, 400, 60);
buttonSelectDir.setBounds(0, 65, 200, 30);
buttonSelectFile.setBounds(200, 65, 200, 30);
shell.pack();
shell.open();
//textUser.forceFocus();
// Set up the event loop.
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
// If no more entries in event queue
display.sleep();
}
}
display.dispose();
}

public static void main(String[] args) {
new DirFileSelection();
}
}

</source>



== FileDialog: prompt for a file name (to save) ==



<source lang="java">

/*
* FileDialog example snippet: prompt for a file name (to save)
*
* For a list of all SWT example snippets see
* http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Shell;
public class Snippet72 {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.open();
FileDialog dialog = new FileDialog(shell, SWT.SAVE);
dialog
.setFilterNames(new String[] { "Batch Files", "All Files (*.*)" });
dialog.setFilterExtensions(new String[] { "*.bat", "*.*" }); // Windows
// wild
// cards
dialog.setFilterPath("c:\\"); // Windows path
dialog.setFileName("fred.bat");
System.out.println("Save to: " + dialog.open());
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}

</source>



== File Viewer ==



<source lang="java">
/******************************************************************************
* All Right Reserved.
* Copyright (c) 1998, 2004 Jackwind Li Guojie
*
* Created on 2004-5-13 10:10:07 by JACK
* $Id$
*
*****************************************************************************/
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.StatusLineManager;
import org.eclipse.jface.action.ToolBarManager;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.window.ApplicationWindow;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.ruposite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class FileViewer extends ApplicationWindow {
// The text control used to display the file content.
Text text;

String content;
String lineDelimiter;

IRunnableWithProgress runnableWithProgress = new IRunnableWithProgress() {
public void run(IProgressMonitor monitor)
throws InvocationTargetException, InterruptedException {
System.out.println("Running from thread: " + Thread.currentThread().getName());

getShell().getDisplay().syncExec(new Runnable() {
public void run() {
content = text.getText();
lineDelimiter = text.getLineDelimiter();
}
});
monitor.beginTask("Counting total number of lines", content.length());
int lines = 1;
for(int i=0; i<content.length(); i++) {
if(monitor.isCanceled()) { // checks whether the operation has been cancelled.
monitor.done();
System.out.println("Action cancelled");
return;
}

// Checks the existance of the line delimiter.
if(i + lineDelimiter.length() < content.length()) {
if(lineDelimiter.equals(content.substring(i, i+lineDelimiter.length()))) {
lines ++;
}
}

monitor.worked(1);
Thread.sleep(1); // 1ms
}

monitor.done();
System.out.println("Total number of lines: " + lines);
}
};

Action actionCount = new Action("Count", ImageDescriptor.createFromFile(null, "icons/run.gif")) {
public void run() {
try {
FileViewer.this.run(true, true, runnableWithProgress);
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};

/**
* @param parentShell
*/
public FileViewer(Shell parentShell) {
super(parentShell);
addMenuBar();
addStatusLine();
addToolBar(SWT.FLAT);
}
/* (non-Javadoc)
* @see org.eclipse.jface.window.Window#createContents(org.eclipse.swt.widgets.ruposite)
*/
protected Control createContents(Composite parent) {
getShell().setText("FileViewer v2.0");
setStatus("Ready");

text = new Text(parent, SWT.MULTI | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
text.setSize(300, 200);
return text;
}

Action actionOpenFile = new Action("Open", ImageDescriptor.createFromFile(null, "icons/open.gif")) {
public void run() {
FileDialog dialog = new FileDialog(getShell(), SWT.OPEN);
final String file = dialog.open();
if(file != null) {
try {
String content = readFileAsAString(new File(file));
text.setText(content);
setStatus("File loaded successfully: " + file);
} catch (IOException e) {
e.printStackTrace();
setStatus("Failed to load file: " + file);
}
}
}
};
/* (non-Javadoc)
* @see org.eclipse.jface.window.ApplicationWindow#createMenuManager()
*/
protected MenuManager createMenuManager() {
MenuManager menuManager = new MenuManager("");

MenuManager fileMenuManager = new MenuManager("&File");
fileMenuManager.add(actionOpenFile);

menuManager.add(fileMenuManager);

MenuManager toolsMenuManager = new MenuManager("&Tools");
toolsMenuManager.add(actionCount);
menuManager.add(toolsMenuManager);

return menuManager;
}
/* (non-Javadoc)
* @see org.eclipse.jface.window.ApplicationWindow#createStatusLineManager()
*/
protected StatusLineManager createStatusLineManager() {
return super.createStatusLineManager();
}
/* (non-Javadoc)
* @see org.eclipse.jface.window.ApplicationWindow#createToolBarManager(int)
*/
protected ToolBarManager createToolBarManager(int style) {
ToolBarManager toolBarManager = new ToolBarManager(style);
toolBarManager.add(actionOpenFile);
toolBarManager.add(actionCount);
return toolBarManager;
}
public static void main(String[] args) {
ApplicationWindow viewer = new FileViewer(null);
viewer.setBlockOnOpen(true);
viewer.open();
}

/**
* Reads the content of a file into a String.
* @param file file to be read
* @return
* @throws IOException
*/
public static String readFileAsAString(File file) throws IOException {
return new String(getBytesFromFile(file));
}

/**
* Returns the contents of the file in a byte array.
* @param file
* @return
* @throws IOException
*/
public static byte[] getBytesFromFile(File file) throws IOException {
InputStream is = new FileInputStream(file);
// Get the size of the file
long length = file.length();
// You cannot create an array using a long type.
// It needs to be an int type.
// Before converting to an int type, check
// to ensure that file is not larger than Integer.MAX_VALUE.
if (length > Integer.MAX_VALUE) {
// File is too large
throw new IllegalArgumentException("File is too large! (larger or equal to 2G)");
}
// Create the byte array to hold the data
byte[] bytes = new byte[(int) length];
// Read in the bytes
int offset = 0;
int numRead = 0;
while (offset < bytes.length
&& (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {
offset += numRead;
}
// Ensure all the bytes have been read in
if (offset < bytes.length) {
throw new IOException(
"Could not completely read file " + file.getName());
}
// Close the input stream and return bytes
is.close();
return bytes;
}
}

</source>

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Java/SWT JFace Eclipse/File Dir Chooser - История изменений

Admin: 1 версия

в 18:01, 31 мая 2010