我在SWT中创建了这个GUI，所以当单击一个按钮时，程序会运行一个函数，然后在标签中显示结果。为了正确显示标签文本，我需要激活shell.layout()功能，以便GUI显示我的新标签
但那会引起另一个问题。每次激活shell.layout()函数时，文本字段会跳到GUI的左上角，我不知道为什么，或者如何让它消失。
这是我的代码：
import java.awt.Color;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.SWT;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.eclipse.swt.widgets.Label;
import org.eclipse.wb.swt.SWTResourceManager;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.jface.databinding.swt.WidgetProperties;
import org.eclipse.core.databinding.beans.PojoProperties;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.layout.RowData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.custom.CLabel;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.jface.text.TextViewer;
import org.eclipse.swt.widgets.Table;
import java.util.*;
//import DosManager.doSmanager;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.graphics.Point;;
public class WinApp2 {
private DataBindingContext m_bindingContext;
protected Shell shell;
private Text destenation_ip;
private final FormToolkit formToolkit = new FormToolkit(Display.getDefault());
private Label lblDestenationPortIp;
private Label lblNewLabel;
private Text amount_of_packets;
private Label lblNewLabel_1;
private Text source_ip;
private Text destenation_port;
private Text source_port;
private Label lblNewLabel_2;
private Label label;
private Label lblNewLabel_4;
private Label lblNewLabel_5;
private Label lblNewLabel_6;
/**
* Launch the application.
* @param args
*/
public static void main(String[] args) {
Display display = Display.getDefault();
Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
public void run() {
try {
WinApp2 window = new WinApp2();
window.open();
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Open the window.
*/
public void open() {
Display display = Display.getDefault();
shell = new Shell(display);
shell.setBackgroundMode(SWT.INHERIT_FORCE);
formToolkit.setBackground(null);
createContents();
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
/**
* Create contents of the window.
*/
protected void createContents() {
shell.layout();
shell.setBackgroundMode(SWT.INHERIT_FORCE);
shell.setSize(450, 307);
shell.setMinimumSize(450, 307);
shell.setText("LAN Destroyer");
shell.setLayout(new FormLayout());
destenation_ip = new Text(shell, SWT.BORDER);
FormData fd_destenation_ip = new FormData();
destenation_ip.setLayoutData(fd_destenation_ip);
lblDestenationPortIp = new Label(shell, SWT.NONE);
lblDestenationPortIp.setOrientation(SWT.RIGHT_TO_LEFT);
FormData fd_lblDestenationPortIp = new FormData();
fd_lblDestenationPortIp.top = new FormAttachment(destenation_ip, 3, SWT.TOP);
fd_lblDestenationPortIp.left = new FormAttachment(0, 351);
lblDestenationPortIp.setLayoutData(fd_lblDestenationPortIp);
//lblDestenationPortIp.setBackground(SWTResourceManager.getColor(SWT.COLOR_LIST_SELECTION_TEXT));
lblDestenationPortIp.setText("IP \u05E9\u05DC \u05D9\u05E2\u05D3:");
lblNewLabel = new Label(shell, SWT.NONE);
fd_lblDestenationPortIp.right = new FormAttachment(lblNewLabel, 0, SWT.RIGHT);
lblNewLabel.setAlignment(SWT.RIGHT);
FormData fd_lblNewLabel = new FormData();
fd_lblNewLabel.right = new FormAttachment(100, -10);
lblNewLabel.setLayoutData(fd_lblNewLabel);
lblNewLabel.setText(":\u05DB\u05DE\u05D5\u05EA");
amount_of_packets = new Text(shell, SWT.BORDER);
fd_destenation_ip.right = new FormAttachment(amount_of_packets, 0, SWT.RIGHT);
fd_destenation_ip.left = new FormAttachment(amount_of_packets, 0, SWT.LEFT);
FormData fd_amount_of_packets = new FormData();
fd_amount_of_packets.right = new FormAttachment(lblNewLabel, -68);
fd_amount_of_packets.top = new FormAttachment(lblNewLabel, -3, SWT.TOP);
amount_of_packets.setLayoutData(fd_amount_of_packets);
Button nonstop_send = new Button(shell, SWT.CHECK);
fd_amount_of_packets.left = new FormAttachment(0, 186);
nonstop_send.setAlignment(SWT.RIGHT);
nonstop_send.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
if(nonstop_send.getSelection()){
amount_of_packets.setEnabled(false);
}
else {
amount_of_packets.setEnabled(true);
}
}
});
FormData fd_nonstop_send = new FormData();
fd_nonstop_send.top = new FormAttachment(lblNewLabel, 0, SWT.TOP);
fd_nonstop_send.right = new FormAttachment(amount_of_packets, -6);
nonstop_send.setLayoutData(fd_nonstop_send);
nonstop_send.setText("\u05E9\u05DC\u05D7 \u05DC\u05DC\u05D0 \u05D4\u05E4\u05E1\u05E7\u05D4");
lblNewLabel_1 = new Label(shell, SWT.NONE);
lblNewLabel_1.setOrientation(SWT.RIGHT_TO_LEFT);
fd_lblNewLabel.top = new FormAttachment(lblNewLabel_1, 6);
lblNewLabel_1.setAlignment(SWT.RIGHT);
FormData fd_lblNewLabel_1 = new FormData();
fd_lblNewLabel_1.top = new FormAttachment(lblDestenationPortIp, 6);
fd_lblNewLabel_1.right = new FormAttachment(100, -10);
lblNewLabel_1.setLayoutData(fd_lblNewLabel_1);
lblNewLabel_1.setText("IP \u05E9\u05DC \u05DE\u05E7\u05D5\u05E8:");
source_ip = new Text(shell, SWT.BORDER);
fd_destenation_ip.bottom = new FormAttachment(source_ip);
fd_lblNewLabel_1.left = new FormAttachment(source_ip, 29);
FormData fd_source_ip = new FormData();
fd_source_ip.top = new FormAttachment(0, 58);
fd_source_ip.left = new FormAttachment(0, 186);
fd_source_ip.right = new FormAttachment(100, -114);
source_ip.setLayoutData(fd_source_ip);
destenation_port = new Text(shell, SWT.BORDER);
fd_nonstop_send.left = new FormAttachment(destenation_port, 3, SWT.LEFT);
FormData fd_destenation_port = new FormData();
fd_destenation_port.bottom = new FormAttachment(destenation_ip, 0, SWT.BOTTOM);
fd_destenation_port.top = new FormAttachment(0, 32);
fd_destenation_port.left = new FormAttachment(0, 40);
fd_destenation_port.width = 78;
destenation_port.setLayoutData(fd_destenation_port);
source_port = new Text(shell, SWT.BORDER );
fd_destenation_port.right = new FormAttachment(source_port, 0, SWT.RIGHT);
FormData fd_source_port = new FormData();
fd_source_port.left = new FormAttachment(0, 40);
fd_source_port.top = new FormAttachment(lblNewLabel_1, -3, SWT.TOP);
source_port.setLayoutData(fd_source_port);
lblNewLabel_2 = new Label(shell, SWT.NONE);
FormData fd_lblNewLabel_2 = new FormData();
fd_lblNewLabel_2.left = new FormAttachment(destenation_port, 6);
fd_lblNewLabel_2.top = new FormAttachment(destenation_ip, 3, SWT.TOP);
lblNewLabel_2.setLayoutData(fd_lblNewLabel_2);
lblNewLabel_2.setText(":\u05E4\u05D5\u05E8\u05D8");
label = new Label(shell, SWT.NONE);
label.setText(":\u05E4\u05D5\u05E8\u05D8");
FormData fd_label = new FormData();
fd_label.top = new FormAttachment(lblNewLabel_2, 6);
fd_label.left = new FormAttachment(source_port, 6);
label.setLayoutData(fd_label);
Button btnAttack = new Button(shell, SWT.NONE);
btnAttack.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
//check if inserted data is valid
Text[] texts = new Text[5];
texts[0] = destenation_ip;
texts[1] = source_ip;
texts[2] = destenation_port;
texts[3] = source_port;
if(amount_of_packets.isEnabled())
texts[4] = amount_of_packets;
else //if amount of packets isn't enabled, don't even check it.
{
texts[4] = new Text(shell,SWT.BORDER);
texts[4].setText("0");
}
shell.layout(false);
}
@Override
public void widgetDefaultSelected(SelectionEvent e) {
}
});
btnAttack.setFont(SWTResourceManager.getFont("Segoe UI", 14, SWT.NORMAL));
btnAttack.setToolTipText("!\u05D4\u05E4\u05DC \u05D0\u05EA \u05D4\u05E8\u05E9\u05EA");
FormData fd_btnAttack = new FormData();
fd_btnAttack.left = new FormAttachment(destenation_ip, 0, SWT.LEFT);
btnAttack.setLayoutData(fd_btnAttack);
btnAttack.setText("Attack!");
Label lblNewLabel_3 = new Label(shell, SWT.NONE);
FormData fd_lblNewLabel_3 = new FormData();
fd_lblNewLabel_3.right = new FormAttachment(100, -10);
fd_lblNewLabel_3.top = new FormAttachment(lblNewLabel, 17);
lblNewLabel_3.setLayoutData(fd_lblNewLabel_3);
lblNewLabel_3.setText(":\u05E4\u05E8\u05D5\u05D8\u05D5\u05E7\u05D5\u05DC");
Combo protocol_combo = new Combo(shell, SWT.READ_ONLY);
protocol_combo.add("TCP");
protocol_combo.add("UDP");
protocol_combo.addSelectionListener(new SelectionListener()
{
@Override
public void widgetSelected(SelectionEvent arg0) {
// TODO Auto-generated method stub
if(protocol_combo.getText().equals("TCP"))
lblNewLabel_5.setVisible(true);
else
lblNewLabel_5.setVisible(false);
}
@Override
public void widgetDefaultSelected(SelectionEvent arg0) {
// TODO Auto-generated method stub
}
});
FormData fd_protocol_combo = new FormData();
fd_protocol_combo.top = new FormAttachment(lblNewLabel_3, 0, SWT.TOP);
fd_protocol_combo.right = new FormAttachment(lblNewLabel_3, -6);
protocol_combo.setLayoutData(fd_protocol_combo);
formToolkit.paintBordersFor(protocol_combo);
lblNewLabel_4 = new Label(shell, SWT.NONE);
FormData fd_lblNewLabel_4 = new FormData();
fd_lblNewLabel_4.top = new FormAttachment(amount_of_packets, 6);
fd_lblNewLabel_4.bottom = new FormAttachment(100, -79);
fd_lblNewLabel_4.right = new FormAttachment(protocol_combo, -6);
lblNewLabel_4.setLayoutData(fd_lblNewLabel_4);
lblNewLabel_5 = new Label(shell, SWT.WRAP | SWT.RIGHT);
fd_btnAttack.top = new FormAttachment(lblNewLabel_5, 22);
lblNewLabel_5.setAlignment(SWT.CENTER);
lblNewLabel_5.setOrientation(SWT.RIGHT_TO_LEFT);
FormData fd_lblNewLabel_5 = new FormData();
fd_lblNewLabel_5.left = new FormAttachment(0, 91);
fd_lblNewLabel_5.top = new FormAttachment(lblNewLabel_3, 0, SWT.TOP);
fd_lblNewLabel_5.right = new FormAttachment(protocol_combo, -6);
lblNewLabel_5.setLayoutData(fd_lblNewLabel_5);
fd_lblNewLabel_5.width=100;
lblNewLabel_5.setText("\u05D6\u05D4\u05D9\u05E8\u05D5\u05EA! \u05E9\u05D9\u05DE\u05D5\u05E9 \u05D1\u05E4\u05E8\u05D5\u05D8\u05D5\u05E7\u05D5\u05DC TCP \u05D9\u05D0\u05D8 \u05D0\u05EA \u05E7\u05E6\u05D1 \u05E9\u05DC\u05D9\u05D7\u05EA \u05D4\u05E4\u05E7\u05D8\u05D9\u05DD!");
lblNewLabel_5.setForeground(SWTResourceManager.getColor(SWT.COLOR_RED));
lblNewLabel_5.setVisible(false);
lblNewLabel_6 = new Label(shell,SWT.WRAP | SWT.RIGHT );
lblNewLabel_6.setLayoutData(new FormData());
lblNewLabel_6.setOrientation(SWT.RIGHT_TO_LEFT);
lblNewLabel_6.setAlignment(SWT.RIGHT);
m_bindingContext = initDataBindings();
}
protected DataBindingContext initDataBindings() {
DataBindingContext bindingContext = new DataBindingContext();
//
return bindingContext;
}
}
每次按下''Attack''按钮，并且shell.layout()功能激活，其中带有'0'（零）字符的文本字段会跳起来。怎么把它搞定？