в 17:44, 31 мая 2010

2010-05-31T17:44:26Z

Admin: 1 версия

2010-05-31T15:21:57Z

1 версия

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== Add selection listener to Combo ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.rubo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class ComboSelectionListener {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new RowLayout());
Combo combo = new Combo(shell, SWT.NONE);
combo.setItems(new String[] { "Press enter to select", "B-1", "C-1" });
combo.addSelectionListener(new SelectionAdapter() {
public void widgetDefaultSelected(SelectionEvent e) {
System.out.println("Combo");
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>



== Add TraverseListener to Combo ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.rubo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class ComboTraverseListener {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new RowLayout());
Text text = new Text(shell, SWT.SINGLE|SWT.BORDER);
text.setText("Press TAB");

Combo combo = new Combo(shell, SWT.NONE);
combo.setItems(new String[] { "Press enter to select", "B-1", "C-1" });
combo.addTraverseListener(new TraverseListener() {
public void keyTraversed(TraverseEvent e) {
System.out.println("keyTraversed");
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>



== Combo default selection event (Return/Enter key) ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.rubo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class ComboDefaultSelection {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new RowLayout());
Combo combo = new Combo(shell, SWT.NONE);
combo.setItems(new String[] { "A-1", "B-1", "C-1" });
Text text = new Text(shell, SWT.SINGLE | SWT.BORDER);
text.setText("some text");
combo.addListener(SWT.DefaultSelection, new Listener() {
public void handleEvent(Event e) {
System.out.println(e.widget + " - Default Selection");
}
});
text.addListener(SWT.DefaultSelection, new Listener() {
public void handleEvent(Event e) {
System.out.println(e.widget + " - Default Selection");
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>



== Disable Tab key to transfer focus for Combo ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.rubo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class ComboTransferFocus {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new RowLayout());
Text text = new Text(shell, SWT.SINGLE|SWT.BORDER);
text.setText("Press TAB");

Combo combo = new Combo(shell, SWT.NONE);
combo.setItems(new String[] { "Press enter to select", "B-1", "C-1" });
combo.addTraverseListener(new TraverseListener() {
public void keyTraversed(TraverseEvent e) {
if (e.detail == SWT.TRAVERSE_TAB_NEXT) {
e.doit = false;
e.detail = SWT.TRAVERSE_NONE;
}
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>



== To track the user"s selection (DefaultSelection) ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.rubo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class ComboSelectionEvent {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
String[] ITEMS = { "A", "B", "C", "D" };
final Combo combo = new Combo(shell, SWT.DROP_DOWN);
combo.setItems(ITEMS);
combo.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
System.out.println("Selected index: " + combo.getSelectionIndex() + ", selected item: "
+ combo.getItem(combo.getSelectionIndex()) + ", text content in the text field: "
+ combo.getText());
}
public void widgetDefaultSelected(SelectionEvent e) {
System.out.println("Default selected index: "
+ combo.getSelectionIndex()
+ ", selected item: "
+ (combo.getSelectionIndex() == -1 ? "<null>" : combo
.getItem(combo.getSelectionIndex())) + ", text content in the text field: "
+ combo.getText());
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>



<OL><LI>The widgetSelected method of the selection listener is called when the combo"s list selection changes.</LI><LI>The widgetDefaultSelected method is typically called when the user presses the Enter key in the combo"s text field.</LI></OL>

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Java Tutorial/SWT/Combo Event - История изменений

в 17:44, 31 мая 2010

Admin: 1 версия