SWT JFace Bookmark SWT JFace Bookmark 制作
人气:0想了解SWT JFace Bookmark 制作的相关内容吗，在本文为您仔细讲解SWT JFace Bookmark的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：SWT,JFace,Bookmark，下面大家一起来学习吧。
代码如下： BookmarkOrganizer.java
复制代码 代码如下:
package swt_jface.demo11;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.swt.SWT;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DragSource;
import org.eclipse.swt.dnd.DragSourceAdapter;
import org.eclipse.swt.dnd.DragSourceEvent;
import org.eclipse.swt.dnd.DropTarget;
import org.eclipse.swt.dnd.DropTargetAdapter;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
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;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.swt.widgets.ToolItem;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
class Bookmark {
public String name;
public String href;
public String addDate;
public String lastVisited;
public String lastModified;
}
public class BookmarkOrganizer {
private static String folderLinePrefix = "<DT><H3 FOLDED";
private static String urlLinePrefix = "<DT><A HREF";
private static Pattern folderPattern = Pattern.compile("\"(\\d+)\">(.*)<");
private static Pattern urlPattern = Pattern.compile("\"(.*)\".*\"(.*)\".*\"(.*)\".*\"(.*)\">(.*)<");
private static String KEY_ADD_DATE = "ADD_DATE";
//private static String KEY_HREF = "HREF";
//private static String KEY_LAST_VISITED = "LAST_VISITED";
//private static String KEY_LAST_MODIFIED = "LAST_MODIFIED";
Display display = new Display();
Shell shell = new Shell(display);
Tree tree;
Label label;
TreeItem rootItem;
Image iconRoot = new Image(display, "C:/icons/icon.gif");
Image iconFolder = new Image(display, "C:/icons/folder.gif");
Image iconURL = new Image(display, "C:/icons/file.gif");
TreeItem dragSourceItem;
public BookmarkOrganizer() {
shell.setText("Bookmark organizer");
shell.setLayout(new GridLayout(1, true));
ToolBar toolBar = new ToolBar(shell, SWT.FLAT);
ToolItem itemOpen = new ToolItem(toolBar, SWT.PUSH);
itemOpen.setText("Load");
itemOpen.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
FileDialog dialog = new FileDialog(shell, SWT.OPEN);
String file = dialog.open();
if (file != null) {
TreeItem[] items = rootItem.getItems();
for (int i = 0; i < items.length; i++)
items[i].dispose();
loadBookmark(new File(file), rootItem);
setStatus("Bookmarks loaded successfully");
}
}
});
ToolItem itemSave = new ToolItem(toolBar, SWT.PUSH);
itemSave.setText("Save as");
itemSave.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
FileDialog dialog = new FileDialog(shell, SWT.SAVE);
String file = dialog.open();
if (file != null) {
try {
BufferedWriter writer =
new BufferedWriter(new FileWriter(file));
saveBookmark(writer, rootItem);
writer.close();
setStatus(
"Bookmarks saved successfully to file: " + file);
} catch (IOException e) {
e.printStackTrace();
}
}
}
});
tree = new Tree(shell, SWT.BORDER);
tree.setLayoutData(new GridData(GridData.FILL_BOTH));
rootItem = new TreeItem(tree, SWT.NULL);
rootItem.setText("BOOKMARKS");
rootItem.setImage(iconRoot);
label = new Label(shell, SWT.BORDER);
label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
final DragSource dragSource =
new DragSource(tree, DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK);
dragSource.setTransfer(
new Transfer[] { BookmarkTransfer.getInstance()});
dragSource.addDragListener(new DragSourceAdapter() {
public void dragStart(DragSourceEvent event) {
TreeItem[] selection = tree.getSelection();
if (selection.length > 0 && selection[0].getData() != null) {
event.doit = true;
dragSourceItem = selection[0];
} else {
event.doit = false;
}
};
public void dragSetData(DragSourceEvent event) {
if (BookmarkTransfer
.getInstance()
.isSupportedType(event.dataType))
event.data = dragSourceItem.getData();
}
public void dragFinished(DragSourceEvent event) {
if (event.detail == DND.DROP_MOVE)
dragSourceItem.dispose();
dragSourceItem = null;
}
});
final DropTarget dropTarget =
new DropTarget(tree, DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK);
dropTarget.setTransfer(
new Transfer[] { BookmarkTransfer.getInstance()});
dropTarget.addDropListener(new DropTargetAdapter() {
public void dragOver(DropTargetEvent event) {
event.feedback =
DND.FEEDBACK_EXPAND
| DND.FEEDBACK_SCROLL
| DND.FEEDBACK_SELECT;
}
public void dropAccept(DropTargetEvent event) {
if (event.item == null
|| ((TreeItem) event.item).getData() != null)
event.detail = DND.DROP_NONE;
}
public void drop(DropTargetEvent event) {
try {
if (event.data == null) {
event.detail = DND.DROP_NONE;
return;
}
TreeItem item = new TreeItem((TreeItem) event.item, SWT.NULL);
Bookmark bookmark = (Bookmark) event.data;
item.setText(bookmark.name);
item.setImage(iconURL);
item.setData(bookmark);
} catch (RuntimeException e) {
e.printStackTrace();
}
}
});
tree.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
TreeItem item = (TreeItem) e.item;
Bookmark bookmark = (Bookmark) item.getData();
if (bookmark != null) {
setStatus(bookmark.href);
} else if (item.getData(KEY_ADD_DATE) != null) {
setStatus("Folder: " + item.getText());
}
}
});
shell.setSize(400, 300);
shell.open();
loadBookmark(new File("C:/icons/mybookmark.htm"), rootItem);
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
private void saveBookmark(BufferedWriter writer, TreeItem item)
throws IOException {
if (item.getData() == null
&& item.getData(KEY_ADD_DATE) == null) {
writer.write(
"<!DOCTYPE NETSCAPE-Bookmark-file-1>\n"
+ "<!-- This is an automatically generated file.\n"
+ "It will be read and overwritten.\n"
+ "Do Not Edit! -->\n"
+ "<TITLE>Bookmarks</TITLE>\n"
+ "<H1>Bookmarks</H1>\n"
+ "<DL><p>\n");
TreeItem[] items = item.getItems();
for (int i = 0; i < items.length; i++)
saveBookmark(writer, items[i]);
writer.write("</DL><p>\n");
} else if (item.getData() == null) {
writer.write(
"\t<DT><H3 FOLDED ADD_DATE=\""
+ item.getData(KEY_ADD_DATE)
+ "\">"
+ item.getText()
+ "</H3>\n");
writer.write("\t<DL><p>\n");
TreeItem[] items = item.getItems();
for (int i = 0; i < items.length; i++)
saveBookmark(writer, items[i]);
writer.write("\t</DL><p>\n");
} else {
Bookmark bookmark = (Bookmark) item.getData();
writer.write(
"\t\t<DT><A HREF="\" HREF="\"""
+ bookmark.href
+ "\" ADD_DATE=\""
+ bookmark.addDate
+ "\" LAST_VISIT=\""
+ bookmark.lastVisited
+ "\" LAST_MODIFIED=\" +"
+ bookmark.lastModified
+ "\">"
+ bookmark.name
+ "</A>\n");
}
}
private void loadBookmark(File file, TreeItem rootItem) {
TreeItem parent = rootItem;
try {
BufferedReader reader = new BufferedReader(new FileReader(file));
String line = null;
while ((line = reader.readLine()) != null) {
line = line.trim();
if (line.startsWith(folderLinePrefix)) {
Matcher matcher = folderPattern.matcher(line);
if (matcher.find()) {
String addDate = matcher.group(1);
String name = matcher.group(2);
TreeItem item = new TreeItem(parent, SWT.NULL);
item.setText(name);
item.setData(KEY_ADD_DATE, addDate);
item.setImage(iconFolder);
parent = item;
}
} else if (line.startsWith(urlLinePrefix)) {
Matcher matcher = urlPattern.matcher(line);
if (matcher.find()) {
Bookmark bookmark = new Bookmark();
bookmark.href = matcher.group(1);
bookmark.addDate = matcher.group(2);
bookmark.lastVisited = matcher.group(3);
bookmark.lastModified = matcher.group(4);
bookmark.name = matcher.group(5);
TreeItem item = new TreeItem(parent, SWT.NULL);
item.setText(bookmark.name);
item.setData(bookmark);
item.setImage(iconURL);
}
} else if (line.equals("</DL><p>")) { // folder boundry.
parent = parent.getParentItem();
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private void setStatus(String message) {
label.setText(message);
}
public static void main(String[] args) {
new BookmarkOrganizer();
}
}
BookmarkTransfer.java
复制代码 代码如下:
package swt_jface.demo11;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import org.eclipse.swt.dnd.ByteArrayTransfer;
import org.eclipse.swt.dnd.TransferData;
public class BookmarkTransfer extends ByteArrayTransfer {
private static final String BOOKMARK_TRANSFER_NAME = "BOOKMARK";
private static final int BOOKMARK_TRANSFER_ID =
registerType(BOOKMARK_TRANSFER_NAME);
private static final BookmarkTransfer instance = new BookmarkTransfer();
public static BookmarkTransfer getInstance() {
return instance;
}
protected int[] getTypeIds() {
return new int[] { BOOKMARK_TRANSFER_ID };
}
protected String[] getTypeNames() {
return new String[] { BOOKMARK_TRANSFER_NAME };
}
protected void javaToNative(Object object, TransferData transferData) {
if (object == null || !(object instanceof Bookmark)) return;
Bookmark bookmark = (Bookmark) object;
if (isSupportedType(transferData)) {
try {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
DataOutputStream out = new DataOutputStream(stream);
out.writeUTF(bookmark.name);
out.writeUTF(bookmark.href);
out.writeUTF(bookmark.addDate);
out.writeUTF(bookmark.lastVisited);
out.writeUTF(bookmark.lastModified);
out.close();
super.javaToNative(stream.toByteArray(), transferData);
} catch (IOException e) {
e.printStackTrace();
}
}
}
protected Object nativeToJava(TransferData transferData) {
if (isSupportedType(transferData)) {
byte[] raw = (byte[]) super.nativeToJava(transferData);
if (raw == null) return null;
Bookmark bookmark = new Bookmark();
try {
ByteArrayInputStream stream = new ByteArrayInputStream(raw);
DataInputStream in = new DataInputStream(stream);
bookmark.name = in.readUTF();
bookmark.href = in.readUTF();
bookmark.addDate = in.readUTF();
bookmark.lastVisited = in.readUTF();
bookmark.lastModified = in.readUTF();
in.close();
} catch (IOException e) {
e.printStackTrace();
return null;
}
return bookmark;
} else {
return null;
}
}
}
mybookmark.htm
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