Java SWT List Tutorial with Examples
1. SWT List
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SWT List is UI component which displays the item list as strings, and allow the user to select one or more items.
Note: SWT List is a common UI component of a SWT application but the SWT List has some disadvantages below:SWT List only contains items (List Items) with the String type.List-Items can not display icons.To overcome the above disadvantages you can use SWT Table instead of SWT List.
The styles can be applied to SWT List:
- SWT.BORDER
- SWT.MULTI: Allow you to select one or more items.
- SWT.SINGLE: Allow you select the only item.
- SWT.V_SCROLL: Display vertical scroll bar.
- SWT.H_SCROLL: Display horizontal scroll bar.
2. SWT List Example
ListDemo.java
package org.o7planning.swt.list;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.RowData;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
public class ListDemo {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("SWT List (o7planning.org)");
shell.setSize(450, 200);
RowLayout layout = new RowLayout(SWT.VERTICAL);
layout.spacing = 10;
layout.marginHeight = 10;
layout.marginWidth = 10;
shell.setLayout(layout);
// Create a List
// (Allows selecte multiple lines and display vertical scroll bar.).
final List list = new List(shell, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);
list.setLayoutData(new RowData(240, 100));
list.add("Apple");
list.add("Apricot");
list.add("Banana");
list.add("Carrot");
list.add("Cherry");
list.add("Courgette");
list.add("Endive");
list.add("Grape");
Label label = new Label(shell, SWT.NONE);
label.setLayoutData(new RowData(240, SWT.DEFAULT));
list.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent event) {
int[] selections = list.getSelectionIndices();
String outText = "";
for (int i = 0; i < selections.length; i++) {
outText += selections[i] + " ";
}
label.setText("You selected: " + outText);
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
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