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== Adding Items ==

To add an item to the specified position in the list, use the following:



<source lang="java">
public void add(String text, int index)</source>



== Add method appends an item to the end of the list ==

The convenient add method appends an item to the end of the list:



<source lang="java">
public void add(String text)</source>



== Create a dropdown Combo ==



<source lang="java">
import org.eclipse.swt.SWT;
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 CreateDropCombo {
// Strings to use as list items
private static final String[] ITEMS = { "A", "B", "C", "D" };
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
// Create a dropdown Combo
Combo combo = new Combo(shell, SWT.DROP_DOWN);
combo.setItems(ITEMS);

shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>



== Create a read-only (non-editable) Combo ==



<source lang="java">
import org.eclipse.swt.SWT;
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 ComboReadOnlyCreate {
// Strings to use as list items
private static final String[] ITEMS = { "A", "B", "C", "D" };
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());

// Create a read-only Combo
Combo readOnly = new Combo(shell, SWT.DROP_DOWN | SWT.READ_ONLY);
readOnly.setItems(ITEMS);

shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>



== Create a "simple" Combo ==



<source lang="java">
import org.eclipse.swt.SWT;
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 ComboSimpleCreate {
// Strings to use as list items
private static final String[] ITEMS = { "A", "B", "C", "D" };
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());

// Create a "simple" Combo
Combo simple = new Combo(shell, SWT.SIMPLE);
simple.setItems(ITEMS);

shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>



== Creating a Combo with Sorted List ==



<source lang="java">
import java.util.Arrays;
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 ComboSortList {
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", "E", "F" };
Arrays.sort(ITEMS);
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());
String text = combo.getText();
if (combo.indexOf(text) < 0) { // Not in the list yet.
combo.add(text);
// Re-sort
String[] items = combo.getItems();
Arrays.sort(items);
combo.setItems(items);
}
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>



The org.eclipse.swt.custom.CCombo class can also be used to create combo boxes.CCombos are usually used inside table cells.

== Deselect an item ==



<source lang="java">
public void deselect(int index)
public void deselectAll()</source>



== Finding Items ==

Search a combo"s list from the given index until an item is found.
If no such item is found, -1 is returned.



<source lang="java">
public int indexOf(String text, int startIndex)</source>



== Getting Items ==

The getItem method returns the item at the specified index



<source lang="java">
public String getItem(int index)</source>



== Getting selected item index from Combo ==



<source lang="java">
import org.eclipse.swt.SWT;
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 ComboSelectedIndex {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Show Message Box");
shell.setLayout(new GridLayout(2, false));
new Label(shell, SWT.NONE).setText("Icon:");
final Combo icons = new Combo(shell, SWT.DROP_DOWN | SWT.READ_ONLY);
icons.add("A");
icons.add("B");
icons.add("C");
icons.select(0);
new Label(shell, SWT.NONE).setText("Buttons:");
final Combo buttons = new Combo(shell, SWT.DROP_DOWN | SWT.READ_ONLY);
buttons.add("1");
buttons.add("2");
buttons.select(0);
new Label(shell, SWT.NONE).setText("Return:");
final Label returnVal = new Label(shell, SWT.NONE);
returnVal.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Button button = new Button(shell, SWT.PUSH);
button.setText("Show Message");
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
returnVal.setText("");
returnVal.setText(icons.getSelectionIndex() + " " + buttons.getSelectionIndex());
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>



== Introducing Combo ==

Combo boxes, also known as dropdowns, combine the strengths of Text and List.
Combo Styles
StyleDescriptionSWT.DROP_DOWNCreates a Combo whose list "drops down."SWT.READ_ONLYDisallows typing input. Only SWT.DROP_DOWN Combos can be read-only.SWT.SIMPLEDisplay Input Box and List together.

== Programmatically select an item from the list ==



<source lang="java">
public void select(int index)</source>



== Removes the first found item with given text ==

Removes the first found item with given text:



<source lang="java">
public void remove(String text)</source>



== Removing Items ==

To remove a single item from the list, use the following:



<source lang="java">
public void remove(int index)</source>



== Retrieve the content text of the text field of a combo ==



<source lang="java">
public String getText()</source>



== Setting Items ==



<source lang="java">
public void setItem(int index, String text)
public void setItems(String[] items)</source>



== To remove multiple items ==



<source lang="java">
public void remove(int startIndex, int endIndex)</source>

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в 17:44, 31 мая 2010

Admin: 1 версия