Class Combo

java.lang.Object

org.eclipse.swt.widgets.Widget

org.eclipse.swt.widgets.Control

org.eclipse.swt.widgets.Scrollable

org.eclipse.swt.widgets.Composite

org.eclipse.swt.widgets.Combo

All Implemented Interfaces:

Drawable

public class Combo
extends Composite

Instances of this class are controls that allow the user to choose an item from a list of items, or optionally enter a new value by typing it into an editable text field. Often, Combos are used in the same place where a single selection List widget could be used but space is limited. A Combo takes less space than a List widget and shows similar information.

Note: Since Combos can contain both a list and an editable text field, it is possible to confuse methods which access one versus the other (compare for example, clearSelection() and deselectAll()). The API documentation is careful to indicate either "the receiver's list" or the "the receiver's text field" to distinguish between the two cases.

Note that although this class is a subclass of Composite, it does not make sense to add children to it, or set a layout on it.

Styles:

DROP_DOWN, READ_ONLY, SIMPLE

Events:

DefaultSelection, Modify, Selection, Verify, OrientationChange

Note: Only one of the styles DROP_DOWN and SIMPLE may be specified.

IMPORTANT: This class is not intended to be subclassed.

See Also:

• List
• Combo snippets
• SWT Example: ControlExample
• Sample code and further information

Field Summary

Fields

Modifier and Type	Field	Description
(package private) long	arrowHandle
(package private) GdkRGBA	background
(package private) long	buttonBoxHandle
(package private) long	buttonHandle
(package private) long	cellBoxHandle
(package private) long	cellHandle
(package private) long	cssProvider
private boolean	delayedEnableWrap
(package private) long	entryHandle
(package private) boolean	firstDraw
(package private) boolean	fitModelToggled
(package private) int	fixEnd
(package private) int	fixStart
(package private) GdkRGBA	foreground
(package private) long	gdkEventKey
(package private) long	imContext
(package private) int	indexSelected
(package private) String[]	items
(package private) int	lastEventTime
static final int	LIMIT	the operating system limit for the number of characters that the text field in an instance of this class can hold
(package private) long	menuHandle
(package private) long	popupHandle
(package private) long	textRenderer
(package private) boolean	unselected
(package private) int	visibleCount

Fields inherited from class Composite

backgroundMode, childrenLowered, embeddedHandle, fixClipHandle, fixClipMap, imHandle, layout, layoutCount, NO_INPUT_METHOD, noChildDrawing, popupChild, socketHandle, tabList

Fields inherited from class Scrollable

horizontalBar, RESIZE_ON_GETCLIENTAREA, scrolledHandle, verticalBar

Fields inherited from class Control

accessible, autoScale, backgroundAlpha, backgroundImage, cachedNoBackground, checkScaleFactor, cssBackground, cssForeground, cursor, DISABLE_EMOJI, dragDetectionQueue, dragGesture, drawCount, drawRegion, enableWindow, eventRegion, firstFixedHandle, fixedHandle, font, gestureBegin, gestureEnd, gestureRotation, gestureSwipe, gestureZoom, keyController, labelRelation, lastInput, layoutData, menu, mouseDown, panGesture, parent, provider, redrawWindow, region, regionHandle, rotateGesture, toolTipText, zoomGesture

Fields inherited from class Widget

ACTIVATE, ACTIVATE_INVERSE, AUTO_TEXT_DIRECTION, BACKGROUND, BACKSPACE, BACKSPACE_INVERSE, BUTTON_PRESS_EVENT, BUTTON_PRESS_EVENT_INVERSE, BUTTON_RELEASE_EVENT, BUTTON_RELEASE_EVENT_INVERSE, CANVAS, CHANGE_VALUE, CHANGED, CHECK_SUBWINDOW, CLICKED, CLOSE_REQUEST, COMMIT, COMPUTE_SIZE, CONFIGURE_EVENT, COPY_CLIPBOARD, COPY_CLIPBOARD_INVERSE, CREATE_MENU_PROXY, CUT_CLIPBOARD, CUT_CLIPBOARD_INVERSE, data, DAY_SELECTED, DAY_SELECTED_DOUBLE_CLICK, DECELERATE, DEFAULT_HEIGHT, DEFAULT_WIDTH, DELETE_EVENT, DELETE_FROM_CURSOR, DELETE_FROM_CURSOR_INVERSE, DELETE_RANGE, DELETE_TEXT, DIRECTION_CHANGED, DISABLED, display, DISPOSE_SENT, DISPOSED, DPI_CHANGED, DRAG_DETECT, DRAW, ENTER, ENTER_NOTIFY_EVENT, EVENT, EVENT_AFTER, eventTable, EXPAND_COLLAPSE_CURSOR_ROW, EXPOSE_EVENT, EXPOSE_EVENT_INVERSE, FOCUS, FOCUS_IN, FOCUS_IN_EVENT, FOCUS_OUT, FOCUS_OUT_EVENT, FONT, FOREGROUND, FOREIGN_HANDLE, gdkSeatGrabPrepareFunc, GESTURE_PRESSED, GESTURE_RELEASED, GRAB_FOCUS, handle, HANDLE, HAS_AUTO_DIRECTION, HIDDEN, HIDE, ICON_RELEASE, IM_UPDATE, INPUT, INSERT_TEXT, IS_ACTIVE, KEY_CHECK_SUBWINDOW, KEY_GTK_CSS, KEY_PRESS_EVENT, KEY_PRESSED, KEY_RELEASE_EVENT, KEY_RELEASED, KEYED_DATA, LAST_SIGNAL, LAYOUT_CHANGED, LAYOUT_CHILD, LAYOUT_NEEDED, LEAVE, LEAVE_NOTIFY_EVENT, MAP, MAP_EVENT, MENU, MNEMONIC_ACTIVATE, MONTH_CHANGED, MOTION, MOTION_INVERSE, MOTION_NOTIFY_EVENT, MOTION_NOTIFY_EVENT_INVERSE, MOVE_CURSOR, MOVE_CURSOR_INVERSE, MOVE_FOCUS, MOVED, NOTIFY_DEFAULT_HEIGHT, NOTIFY_DEFAULT_WIDTH, NOTIFY_MAXIMIZED, NOTIFY_STATE, OBSCURED, OUTPUT, PARENT_BACKGROUND, PASTE_CLIPBOARD, PASTE_CLIPBOARD_INVERSE, POPPED_UP, POPULATE_POPUP, POPUP_MENU, PREEDIT_CHANGED, REALIZE, RELEASED, RESIZED, ROW_ACTIVATED, ROW_DELETED, ROW_HAS_CHILD_TOGGLED, ROW_INSERTED, SCROLL, SCROLL_BEGIN, SCROLL_CHILD, SCROLL_END, SCROLL_EVENT, SELECT, SELECTION_DONE, SHOW, SHOW_HELP, SIZE_ALLOCATE, SIZE_ALLOCATE_GTK4, SKIN_NEEDED, START_INTERACTIVE_SEARCH, state, STATUS_ICON_POPUP_MENU, style, STYLE_UPDATED, SWITCH_PAGE, TEST_COLLAPSE_ROW, TEST_EXPAND_ROW, TEXT_BUFFER_INSERT_TEXT, THEME_BACKGROUND, TOGGLED, UNMAP, UNMAP_EVENT, UNREALIZE, VALUE_CHANGED, WINDOW_STATE_EVENT, ZERO_HEIGHT, ZERO_WIDTH

Constructor Summary

Constructors

Constructor	Description
Combo(Composite parent, int style)	Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

Method Summary

Modifier and Type	Method	Description
void	add(String string)	Adds the argument to the end of the receiver's list.
void	add(String string, int index)	Adds the argument to the receiver's list at the given zero-relative index.
void	addModifyListener(ModifyListener listener)	Adds the listener to the collection of listeners who will be notified when the receiver's text is modified, by sending it one of the messages defined in the ModifyListener interface.
void	addSegmentListener(SegmentListener listener)	Adds a segment listener.
void	addSelectionListener(SelectionListener listener)	Adds the listener to the collection of listeners who will be notified when the user changes the receiver's selection, by sending it one of the messages defined in the SelectionListener interface.
void	addVerifyListener(VerifyListener listener)	Adds the listener to the collection of listeners who will be notified when the receiver's text is verified, by sending it one of the messages defined in the VerifyListener interface.
(package private) void	adjustChildClipping(long widget)	Allows Controls to adjust the clipping of themselves or their children.
(package private) static int	checkStyle(int style)
protected void	checkSubclass()	Checks that this class can be subclassed.
(package private) boolean	checkSubwindow()
void	clearSelection()	Sets the selection in the receiver's text field to an empty selection starting just before the first character.
(package private) void	clearText()
(package private) Point	computeNativeSize(long h, int wHint, int hHint, boolean changed)
(package private) Point	computeSizeInPixels(int wHint, int hHint, boolean changed)
void	copy()	Copies the selected text.
(package private) void	createHandle(int index)
void	cut()	Cuts the selected text.
(package private) GdkRGBA	defaultBackground()
(package private) void	deregister()
void	deselect(int index)	Deselects the item at the given zero-relative index in the receiver's list.
void	deselectAll()	Deselects all selected items in the receiver's list.
(package private) boolean	dragDetect(int x, int y, boolean filter, boolean dragOnTimeout, boolean[] consume)
(package private) long	enterExitHandle()
(package private) long	eventSurface()
(package private) long	eventWindow()
(package private) boolean	filterKey(long event)
(package private) long	findArrowHandle()
(package private) long	findButtonHandle()
(package private) long	findMenuHandle()
(package private) long	findPopupHandle(long oldList)
(package private) void	fixIM()
(package private) void	fixModal(long group, long modalGroup)
(package private) long	focusHandle()
(package private) long	fontHandle()
Point	getCaretLocation()	Returns a point describing the location of the caret relative to the receiver.
int	getCaretPosition()	Returns the character position of the caret.
(package private) GdkRGBA	getContextBackgroundGdkRGBA()
(package private) GdkRGBA	getContextColorGdkRGBA()
String	getItem(int index)	Returns the item at the given, zero-relative index in the receiver's list.
int	getItemCount()	Returns the number of items contained in the receiver's list.
int	getItemHeight()	Returns the height of the area which would be used to display one of the items in the receiver's list.
String[]	getItems()	Returns a (possibly empty) array of Strings which are the items in the receiver's list.
boolean	getListVisible()	Returns true if the receiver's list is visible, and false otherwise.
(package private) String	getNameText()
int	getOrientation()	Returns the orientation of the receiver.
Point	getSelection()	Returns a Point whose x coordinate is the character position representing the start of the selection in the receiver's text field, and whose y coordinate is the character position representing the end of the selection.
int	getSelectionIndex()	Returns the zero-relative index of the item which is currently selected in the receiver's list, or -1 if no item is selected.
String	getText()	Returns a string containing a copy of the contents of the receiver's text field, or an empty string if there are no contents.
(package private) String	getText(int start, int stop)
int	getTextHeight()	Returns the height of the receivers's text field.
int	getTextLimit()	Returns the maximum number of characters that the receiver's text field is capable of holding.
int	getVisibleItemCount()	Gets the number of items that are visible in the drop down portion of the receiver's list.
(package private) long	gtk_activate(long widget)
(package private) long	gtk_button_press_event(long widget, long event)
(package private) long	gtk_changed(long widget)
private void	gtk_combo_box_insert(String string, int index)
private void	gtk_combo_box_text_remove_all()
private void	gtk_combo_box_toggle_wrap(boolean wrap)	Bug 489640, 438992.
(package private) long	gtk_commit(long imContext, long text)
(package private) long	gtk_delete_text(long widget, long start_pos, long end_pos)
(package private) long	gtk_draw(long widget, long cairo)
(package private) long	gtk_focus_out_event(long widget, long event)
(package private) long	gtk_insert_text(long widget, long new_text, long new_text_length, long position)
(package private) long	gtk_populate_popup(long widget, long menu)
(package private) long	gtk_selection_done(long menushell)
(package private) long	gtk_style_updated(long widget)
(package private) long	gtk3_event_after(long widget, long gdkEvent)
(package private) long	gtk3_key_press_event(long widget, long event)
(package private) boolean	hasFocus()
(package private) void	hookEvents()
(package private) void	hookEvents(long[] handles)
(package private) long	imContext()
int	indexOf(String string)	Searches the receiver's list starting at the first item (index 0) until an item is found that is equal to the argument, and returns the index of that item.
int	indexOf(String string, int start)	Searches the receiver's list starting at the given, zero-relative index until an item is found that is equal to the argument, and returns the index of that item.
(package private) boolean	isFocusHandle(long widget)
(package private) long	paintSurface()
(package private) long	parentingHandle()
void	paste()	Pastes text from clipboard.
(package private) void	register()
(package private) void	releaseHandle()
(package private) void	releaseWidget()
void	remove(int index)	Removes the item from the receiver's list at the given zero-relative index.
void	remove(int start, int end)	Removes the items from the receiver's list which are between the given zero-relative start and end indices (inclusive).
void	remove(String string)	Searches the receiver's list starting at the first item until an item is found that is equal to the argument, and removes that item from the list.
void	removeAll()	Removes all of the items from the receiver's list and clear the contents of receiver's text field.
void	removeModifyListener(ModifyListener listener)	Removes the listener from the collection of listeners who will be notified when the receiver's text is modified.
void	removeSegmentListener(SegmentListener listener)	Removes the listener from the collection of listeners who will be notified when the receiver's text is modified.
void	removeSelectionListener(SelectionListener listener)	Removes the listener from the collection of listeners who will be notified when the user changes the receiver's selection.
void	removeVerifyListener(VerifyListener listener)	Removes the listener from the collection of listeners who will be notified when the control is verified.
(package private) Point	resizeCalculationsGTK3(long widget, int width, int height)
void	select(int index)	Selects the item at the given zero-relative index in the receiver's list.
(package private) void	setBackgroundGdkRGBA(long context, long handle, GdkRGBA rgba)
(package private) int	setBounds(int x, int y, int width, int height, boolean move, boolean resize)
(package private) void	setButtonHandle(long widget)
(package private) void	setFontDescription(long font)
(package private) void	setForegroundGdkRGBA(long handle, GdkRGBA rgba)
(package private) void	setInitialBounds()
void	setItem(int index, String string)	Sets the text of the item in the receiver's list at the given zero-relative index to the string argument.
void	setItems(String... items)	Sets the receiver's list to be the given array of items.
void	setListVisible(boolean visible)	Marks the receiver's list as visible if the argument is true, and marks it invisible otherwise.
(package private) void	setMenuHandle(long widget)
(package private) void	setOrientation(boolean create)
void	setOrientation(int orientation)	Sets the orientation of the receiver, which must be one of the constants SWT.LEFT_TO_RIGHT or SWT.RIGHT_TO_LEFT.
void	setSelection(Point selection)	Sets the selection in the receiver's text field to the range specified by the argument whose x coordinate is the start of the selection and whose y coordinate is the end of the selection.
void	setText(String string)	Sets the contents of the receiver's text field to the given string.
void	setTextLimit(int limit)	Sets the maximum number of characters that the receiver's text field is capable of holding to be the argument.
(package private) void	setToolTipText(Shell shell, String newString)
void	setVisibleItemCount(int count)	Sets the number of items that are visible in the drop down portion of the receiver's list.
(package private) boolean	translateTraversal(long event)
(package private) void	updateCss()
(package private) String	verifyText(String string, int start, int end)

Methods inherited from class Composite

_getChildren, _getTabList, applyThemeBackground, changed, checkBuffered, computeTabList, connectFixedHandleDraw, createHandle, drawBackground, enableWidget, findDeferredControl, findMenus, fixChildren, fixClippings, fixParentGdkResource, fixStyle, fixTabList, fixZOrder, forceFocus, getBackgroundMode, getChildren, getChildrenCount, getClientAreaInPixels, getLayout, getLayoutDeferred, getTabList, gtk_focus, gtk_focus_in_event, gtk_map, gtk_realize, gtk_scroll_child, gtk4_key_press_event, hasBorder, hooksKeys, imHandle, isLayoutDeferred, isTabGroup, layout, layout, layout, layout, layout, markLayout, minimumSize, moveAbove, moveBelow, moveChildren, mustBeVisibleOnInitBounds, printWidget, propagateDraw, redrawChildren, releaseChildren, removeControl, resizeHandle, reskinChildren, setBackgroundMode, setFocus, setLayout, setLayoutDeferred, setScrollBarVisible, setTabGroupFocus, setTabItemFocus, setTabList, showWidget, toString, translateMnemonic, traversalCode, updateBackgroundMode, updateLayout

Methods inherited from class Scrollable

clientHandle, computeTrim, computeTrimInPixels, createScrollBar, createWidget, destroyScrollBar, getBorderWidthInPixels, getClientArea, getHorizontalBar, getScrollbarsMode, getVerticalBar, gtk_scroll_event, hScrollBarWidth, redrawBackgroundImage, redrawWidget, sendLeaveNotify, setScrollbarsMode, topHandle, updateScrollBarValue, vScrollBarWidth

Methods inherited from class Control

_getAccessible, _getShell, addControlListener, addDragDetectListener, addFocusListener, addGestureListener, addHelpListener, addKeyListener, addMenuDetectListener, addMouseListener, addMouseMoveListener, addMouseTrackListener, addMouseWheelListener, addPaintListener, addRelation, addTouchListener, addTraverseListener, cairoClipRegion, cairoCopyRegion, cairoDisposeRegion, checkBackground, checkBorder, checkMirrored, cleanupEnableWindow, computeSize, computeSize, computeSizeInPixels, computeTabGroup, computeTabRoot, containedInRegion, defaultFont, destroyWidget, dragDetect, dragDetect, dragDetect, drawBackground, drawGripper, drawWidget, eventHandle, findBackgroundControl, fixFocus, fixGdkEventTypeValues, fixStyle, flushQueueOnDnd, forceFocus, forceResize, gestureBeginProc, gestureEndProc, gestureHandle, getAccessible, getBackground, getBackgroundGdkRGBA, getBackgroundImage, getBaseGdkRGBA, getBgGdkRGBA, getBorderWidth, getBounds, getBoundsInPixels, getClientWidth, getControl, getControlOrigin, getCursor, getDragDetect, getEnabled, getFont, getFontDescription, getForeground, getForegroundGdkRGBA, getIMCaretPos, getLayoutData, getLocation, getLocationInPixels, getMenu, getMonitor, getParent, getPath, getRegion, getShell, getSize, getSizeInPixels, getSurfaceOrigin, getTextDirection, getThickness, getToolTipText, getTouchEnabled, getVisible, getWindowOrigin, gtk_button_press_event, gtk_button_release_event, gtk_css_provider_load_from_css, gtk_enter_notify_event, gtk_gesture_press_event, gtk_gesture_release_event, gtk_label_set_align, gtk_leave_notify_event, gtk_mnemonic_activate, gtk_motion_notify_event, gtk_preedit_changed, gtk_style_context_get_border, gtk_style_context_get_padding, gtk_unrealize, gtk_widget_reparent, gtk_widget_set_align, gtk3_key_release_event, gtk3_popup_menu, gtk3_show_help, gtk4_draw, gtk4_enter_event, gtk4_focus_enter_event, gtk4_focus_leave_event, gtk4_focus_window_event, gtk4_key_release_event, gtk4_leave_event, gtk4_motion_event, gtk4_scroll_event, hooksPaint, hoverProc, internal_dispose_GC, internal_new_GC, isActive, isAutoScalable, isDescribedByLabel, isEnabled, isFocusAncestor, isFocusControl, isReparentable, isShowing, isTabItem, isVisible, magnifyProc, menuShell, mnemonicHit, mnemonicMatch, moveAbove, moveBelow, moveHandle, pack, pack, paintHandle, paintWindow, print, printWindow, redraw, redraw, redraw, release, releaseParent, removeControlListener, removeDragDetectListener, removeFocusListener, removeGestureListener, removeHelpListener, removeKeyListener, removeMenuDetectListener, removeMouseListener, removeMouseMoveListener, removeMouseTrackListener, removeMouseWheelListener, removePaintListener, removeRelation, removeTouchListener, removeTraverseListener, requestLayout, restackWindow, rotateProc, sendDragEvent, sendFocusEvent, sendGestureEvent, sendGestureEvent, sendGestureEvent, sendHelpEvent, sendMouseEvent, sendMouseEvent, setBackground, setBackground, setBackgroundGdkRGBA, setBackgroundGdkRGBA, setBackgroundImage, setBackgroundSurface, setBounds, setBounds, setBoundsInPixels, setBoundsInPixels, setCapture, setCursor, setCursor, setDragDetect, setEnabled, setFont, setForeground, setForegroundGdkRGBA, setLayoutData, setLocation, setLocation, setLocationInPixels, setLocationInPixels, setMenu, setParent, setParentBackground, setParentGdkResource, setRadioSelection, setRedraw, setRegion, setRelations, setSize, setSize, setSizeInPixels, setSizeInPixels, setTextDirection, setToolTipText, setTouchEnabled, setVisible, setWidgetBackground, setZOrder, setZOrder, showMenu, showMenu, sort, swipeProc, toControl, toControl, toDisplay, toDisplay, toDisplayInPixels, translateMnemonic, traverse, traverse, traverse, traverse, traverse, traverseEscape, traverseGroup, traverseItem, traverseMnemonic, traversePage, traverseReturn, update, update, wantDragDropDetection, windowProc

Methods inherited from class Widget

_addListener, addDisposeListener, addListener, addTypedListener, cellDataProc, checkBits, checkOpen, checkOrientation, checkParent, checkWidget, convertPangoFontDescriptionToCss, cssHandle, dispose, dpiChanged, enterMotionProc, error, filterProc, filters, fixMnemonic, fixMnemonic, fixMnemonic, focusProc, fontHeight, gdk_event_free, gdk_event_get_state, gdk_event_get_surface_or_window, gdk_pointer_grab, gdk_pointer_ungrab, gdk_surface_get_size, gdk_window_get_size, GdkSeatGrabPrepareFunc, gesturePressReleaseProc, getData, getData, getDisplay, getListeners, getName, getStyle, getTypedListeners, gtk_adjustment_get, gtk_box_new, gtk_box_pack_end, gtk_box_set_child_packing, gtk_cell_renderer_get_preferred_size, gtk_change_value, gtk_clicked, gtk_close_request, gtk_configure_event, gtk_container_get_border_width_or_margin, gtk_container_set_border_width, gtk_create_menu_proxy, gtk_day_selected, gtk_day_selected_double_click, gtk_delete_event, gtk_delete_range, gtk_expand_collapse_cursor_row, gtk_grab_focus, gtk_hide, gtk_icon_release, gtk_input, gtk_map_event, gtk_menu_popped_up, gtk_month_changed, gtk_move_focus, gtk_output, gtk_row_activated, gtk_row_has_child_toggled, gtk_select, gtk_show, gtk_size_allocate, gtk_start_interactive_search, gtk_status_icon_popup_menu, gtk_switch_page, gtk_test_collapse_row, gtk_test_expand_row, gtk_text_buffer_insert_text, gtk_timer, gtk_toggled, gtk_tree_view_column_cell_get_position, gtk_unmap, gtk_unmap_event, gtk_value_changed, gtk_widget_get_preferred_size, gtk_widget_get_surface, gtk_widget_get_window, gtk_widget_hide, gtk_widget_show, gtk_widget_size_allocate, gtk_window_state_event, hooks, isAutoDirection, isDisposed, isListening, isValidSubclass, isValidThread, keyPressReleaseProc, leaveProc, mnemonicHit, mnemonicMatch, notifyCreationTracker, notifyDisposalTracker, notifyListeners, notifyProc, notifyState, postEvent, postEvent, removeDisposeListener, removeListener, removeListener, removeListener, removeTypedListener, rendererGetPreferredWidthProc, rendererRenderProc, rendererSnapshotProc, reskin, reskinWidget, scrollProc, sendEvent, sendEvent, sendEvent, sendEvent, sendIMKeyEvent, sendKeyEvent, sendSelectionEvent, sendSelectionEvent, setButtonState, setData, setData, setFontDescription, setInputState, setKeyState, setLocationState, setToolTipText, shellMapProc, sizeAllocateProc, sizeRequestProc, snapshotToDraw, timerProc, translateTraversal, windowActiveProc, windowProc, windowProc, windowProc, windowProc

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

buttonHandle

long buttonHandle

entryHandle

long entryHandle

textRenderer

long textRenderer

cellHandle

long cellHandle

popupHandle

long popupHandle

menuHandle

long menuHandle

buttonBoxHandle

long buttonBoxHandle

cellBoxHandle

long cellBoxHandle

arrowHandle

long arrowHandle

lastEventTime

int lastEventTime

visibleCount

int visibleCount

imContext

long imContext

gdkEventKey

long gdkEventKey

fixStart

int fixStart

fixEnd

int fixEnd

items

String[] items

indexSelected

int indexSelected

background

GdkRGBA background

foreground

GdkRGBA foreground

cssProvider

long cssProvider

firstDraw

boolean firstDraw

unselected

boolean unselected

fitModelToggled

boolean fitModelToggled

LIMIT

public static final int LIMIT

the operating system limit for the number of characters that the text field in an instance of this class can hold

delayedEnableWrap

private boolean delayedEnableWrap

Constructor Details

Combo

public Combo(Composite parent,
 int style)

Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

The style value is either one of the style constants defined in class SWT which is applicable to instances of this class, or must be built by bitwise OR'ing together (that is, using the int "|" operator) two or more of those SWT style constants. The class description lists the style constants that are applicable to the class. Style bits are also inherited from superclasses.

Parameters:

parent - a composite control which will be the parent of the new instance (cannot be null)

style - the style of control to construct

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the parent is null

SWTException -

• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
• ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass

See Also:

• SWT.DROP_DOWN
• SWT.READ_ONLY
• SWT.SIMPLE
• Widget.checkSubclass()
• Widget.getStyle()

Method Details

add

public void add(String string)

Adds the argument to the end of the receiver's list.

Note: If control characters like '\n', '\t' etc. are used in the string, then the behavior is platform dependent.

Parameters:

string - the new item

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the string is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

• add(String,int)

add

public void add(String string,
 int index)

Adds the argument to the receiver's list at the given zero-relative index.

Note: To add an item at the end of the list, use the result of calling getItemCount() as the index or use add(String).

Also note, if control characters like '\n', '\t' etc. are used in the string, then the behavior is platform dependent.

Parameters:

string - the new item

index - the index for the item

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the string is null
• ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list (inclusive)

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

• add(String)

gtk_combo_box_insert

private void gtk_combo_box_insert(String string,
 int index)

gtk_combo_box_toggle_wrap

private void gtk_combo_box_toggle_wrap(boolean wrap)

Bug 489640, 438992. Drop-down appearance.

In Gtk3, there is a lot of white space at the top of the combo drop-down. It's meant to put the first item near the cursor (See screen shots in bug 438992), but makes eclipse look buggy.

Solution (438992): gtk_combo_box_get_wrap_width(1) fixes this problem, but introduces a performance regression. When multiple items are added in a loop, then if 'wrap' is enabled then after every insertion, gtk traverses the entire list and greedily re-computes the drop-down list size. This causes O(n^2) performance regression in that the longer the list, the longer the size computation takes. E.g Adding 1000 items takes almost 30 seconds.

Solution ^2 (489640): We enabled wrap in a delayed/lazy way, only when display event loop is ran. This way the insertions occur at O(n) speed and we get the benefit of a neat drop-down list when the user launches the application. Run-time insertions and combo.add(..) are also covered by this logic.

Gtk4 port note: - Note, Combo was re-written in Gtk3 and it will be re-written again in Gtk4. See: https://mail.gnome.org/archives/gtk-list/2016-December/msg00036.html https://raw.githubusercontent.com/gnome-design-team/gnome-mockups/master/theming/widgets/combobox-replacements.png // mockup screen shot. - So probably this workaround should be removed in Gtk4 port. Feel free to validate via Bug489640_SlowCombo and Bug489640_SlowComboSingleItem test snippets.

CSS note: Do not use the CSS 'appears-as-list' style. It's a poorly working hack. If list has more than +-1000 entries, then we get visual cheese and jvm crashes.

addModifyListener

public void addModifyListener(ModifyListener listener)

Adds the listener to the collection of listeners who will be notified when the receiver's text is modified, by sending it one of the messages defined in the ModifyListener interface.

Parameters:

listener - the listener which should be notified

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

• ModifyListener
• removeModifyListener(ModifyListener)

addSegmentListener

public void addSegmentListener(SegmentListener listener)

Adds a segment listener.

A SegmentEvent is sent whenever text content is being modified or a segment listener is added or removed. You can customize the appearance of text by indicating certain characters to be inserted at certain text offsets. This may be used for bidi purposes, e.g. when adjacent segments of right-to-left text should not be reordered relative to each other. E.g., multiple Java string literals in a right-to-left language should generally remain in logical order to each other, that is, the way they are stored.

Warning: This API is currently only implemented on Windows. SegmentEvents won't be sent on GTK and Cocoa.

Parameters:

listener - the listener which should be notified

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

3.103

See Also:

• SegmentEvent
• SegmentListener
• removeSegmentListener(SegmentListener)

addSelectionListener

public void addSelectionListener(SelectionListener listener)

Adds the listener to the collection of listeners who will be notified when the user changes the receiver's selection, by sending it one of the messages defined in the SelectionListener interface.

widgetSelected is called when the user changes the combo's list selection. widgetDefaultSelected is typically called when ENTER is pressed the combo's text area.

Parameters:

listener - the listener which should be notified

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

• SelectionListener
• removeSelectionListener(SelectionListener)
• SelectionEvent

addVerifyListener

public void addVerifyListener(VerifyListener listener)

Adds the listener to the collection of listeners who will be notified when the receiver's text is verified, by sending it one of the messages defined in the VerifyListener interface.

Parameters:

listener - the listener which should be notified

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

3.1

See Also:

• VerifyListener
• removeVerifyListener(VerifyListener)

checkStyle

static int checkStyle(int style)

checkSubclass

protected void checkSubclass()

Description copied from class: Widget

Checks that this class can be subclassed.

The SWT class library is intended to be subclassed only at specific, controlled points (most notably, Composite and Canvas when implementing new widgets). This method enforces this rule unless it is overridden.

IMPORTANT: By providing an implementation of this method that allows a subclass of a class which does not normally allow subclassing to be created, the implementer agrees to be fully responsible for the fact that any such subclass will likely fail between SWT releases and will be strongly platform specific. No support is provided for user-written classes which are implemented in this fashion.

The ability to subclass outside of the allowed SWT classes is intended purely to enable those not on the SWT development team to implement patches in order to get around specific limitations in advance of when those limitations can be addressed by the team. Subclassing should not be attempted without an intimate and detailed understanding of the hierarchy.

Overrides:

checkSubclass in class Composite

clearSelection

public void clearSelection()

Sets the selection in the receiver's text field to an empty selection starting just before the first character. If the text field is editable, this has the effect of placing the i-beam at the start of the text.

Note: To clear the selected items in the receiver's list, use deselectAll().

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

• deselectAll()

clearText

void clearText()

computeSizeInPixels

Point computeSizeInPixels(int wHint,
 int hHint,
 boolean changed)

Overrides:

computeSizeInPixels in class Composite

computeNativeSize

Point computeNativeSize(long h,
 int wHint,
 int hHint,
 boolean changed)

Overrides:

computeNativeSize in class Control

copy

public void copy()

Copies the selected text.

The current selection is copied to the clipboard.

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

2.1

createHandle

void createHandle(int index)

Overrides:

createHandle in class Composite

cut

public void cut()

Cuts the selected text.

The current selection is first copied to the clipboard and then deleted from the widget.

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

2.1

defaultBackground

GdkRGBA defaultBackground()

Overrides:

defaultBackground in class Control

deregister

void deregister()

Overrides:

deregister in class Composite

filterKey

boolean filterKey(long event)

Overrides:

filterKey in class Control

findPopupHandle

long findPopupHandle(long oldList)

resizeCalculationsGTK3

Point resizeCalculationsGTK3(long widget,
 int width,
 int height)

Overrides:

resizeCalculationsGTK3 in class Control

findButtonHandle

long findButtonHandle()

findArrowHandle

long findArrowHandle()

findMenuHandle

long findMenuHandle()

fixModal

void fixModal(long group,
 long modalGroup)

Overrides:

fixModal in class Composite

fixIM

void fixIM()

fontHandle

long fontHandle()

Overrides:

fontHandle in class Control

focusHandle

long focusHandle()

Overrides:

focusHandle in class Composite

hasFocus

boolean hasFocus()

Overrides:

hasFocus in class Control

hookEvents

void hookEvents()

Overrides:

hookEvents in class Composite

hookEvents

void hookEvents(long[] handles)

imContext

long imContext()

deselect

public void deselect(int index)

Deselects the item at the given zero-relative index in the receiver's list. If the item at the index was already deselected, it remains deselected. Indices that are out of range are ignored.

Parameters:

index - the index of the item to deselect

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

deselectAll

public void deselectAll()

Deselects all selected items in the receiver's list.

Note: To clear the selection in the receiver's text field, use clearSelection().

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

• clearSelection()

dragDetect

boolean dragDetect(int x,
 int y,
 boolean filter,
 boolean dragOnTimeout,
 boolean[] consume)

Overrides:

dragDetect in class Control

enterExitHandle

long enterExitHandle()

Overrides:

enterExitHandle in class Control

eventWindow

long eventWindow()

Overrides:

eventWindow in class Control

eventSurface

long eventSurface()

Overrides:

eventSurface in class Control

getCaretLocation

public Point getCaretLocation()

Returns a point describing the location of the caret relative to the receiver.

Returns:

a point, the location of the caret

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

3.8

getCaretPosition

public int getCaretPosition()

Returns the character position of the caret.

Indexing is zero based.

Returns:

the position of the caret

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

3.8

getContextBackgroundGdkRGBA

GdkRGBA getContextBackgroundGdkRGBA()

Overrides:

getContextBackgroundGdkRGBA in class Control

getContextColorGdkRGBA

GdkRGBA getContextColorGdkRGBA()

Overrides:

getContextColorGdkRGBA in class Control

getItem

public String getItem(int index)

Returns the item at the given, zero-relative index in the receiver's list. Throws an exception if the index is out of range.

Parameters:

index - the index of the item to return

Returns:

the item at the given index

Throws:

IllegalArgumentException -

• ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getItemCount

public int getItemCount()

Returns the number of items contained in the receiver's list.

Returns:

the number of items

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getItemHeight

public int getItemHeight()

Returns the height of the area which would be used to display one of the items in the receiver's list.

Returns:

the height of one item

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getItems

public String[] getItems()

Returns a (possibly empty) array of Strings which are the items in the receiver's list.

Note: This is not the actual structure used by the receiver to maintain its list of items, so modifying the array will not affect the receiver.

Returns:

the items in the receiver's list

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getListVisible

public boolean getListVisible()

Returns true if the receiver's list is visible, and false otherwise.

If one of the receiver's ancestors is not visible or some other condition makes the receiver not visible, this method may still indicate that it is considered visible even though it may not actually be showing.

Returns:

the receiver's list's visibility state

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

3.4

getNameText

String getNameText()

Overrides:

getNameText in class Widget

getOrientation

public int getOrientation()

Returns the orientation of the receiver.

Overrides:

getOrientation in class Control

Returns:

the orientation style

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

2.1.2

getSelection

public Point getSelection()

Returns a Point whose x coordinate is the character position representing the start of the selection in the receiver's text field, and whose y coordinate is the character position representing the end of the selection. An "empty" selection is indicated by the x and y coordinates having the same value.

Indexing is zero based. The range of a selection is from 0..N where N is the number of characters in the widget.

Returns:

a point representing the selection start and end

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getSelectionIndex

public int getSelectionIndex()

Returns the zero-relative index of the item which is currently selected in the receiver's list, or -1 if no item is selected.

Returns:

the index of the selected item

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getText

public String getText()

Returns a string containing a copy of the contents of the receiver's text field, or an empty string if there are no contents.

Returns:

the receiver's text

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getText

String getText(int start,
 int stop)

getTextHeight

public int getTextHeight()

Returns the height of the receivers's text field.

Returns:

the text height

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getTextLimit

public int getTextLimit()

Returns the maximum number of characters that the receiver's text field is capable of holding. If this has not been changed by setTextLimit(), it will be the constant Combo.LIMIT.

Returns:

the text limit

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

• LIMIT

getVisibleItemCount

public int getVisibleItemCount()

Gets the number of items that are visible in the drop down portion of the receiver's list.

Note: This operation is a hint and is not supported on platforms that do not have this concept.

Returns:

the number of items that are visible

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

3.0

gtk_activate

long gtk_activate(long widget)

Overrides:

gtk_activate in class Widget

gtk_button_press_event

long gtk_button_press_event(long widget,
 long event)

Overrides:

gtk_button_press_event in class Composite

gtk_changed

long gtk_changed(long widget)

Overrides:

gtk_changed in class Widget

gtk_commit

long gtk_commit(long imContext,
 long text)

Overrides:

gtk_commit in class Control

gtk_delete_text

long gtk_delete_text(long widget,
 long start_pos,
 long end_pos)

Overrides:

gtk_delete_text in class Widget

adjustChildClipping

void adjustChildClipping(long widget)

Description copied from class: Control

Allows Controls to adjust the clipping of themselves or their children.

Overrides:

adjustChildClipping in class Composite

Parameters:

widget - the handle to the widget

gtk_draw

long gtk_draw(long widget,
 long cairo)

Overrides:

gtk_draw in class Composite

gtk3_event_after

long gtk3_event_after(long widget,
 long gdkEvent)

Overrides:

gtk3_event_after in class Control

gtk_focus_out_event

long gtk_focus_out_event(long widget,
 long event)

Overrides:

gtk_focus_out_event in class Composite

gtk_insert_text

long gtk_insert_text(long widget,
 long new_text,
 long new_text_length,
 long position)

Overrides:

gtk_insert_text in class Widget

gtk3_key_press_event

long gtk3_key_press_event(long widget,
 long event)

Overrides:

gtk3_key_press_event in class Composite

gtk_populate_popup

long gtk_populate_popup(long widget,
 long menu)

Overrides:

gtk_populate_popup in class Widget

gtk_selection_done

long gtk_selection_done(long menushell)

Overrides:

gtk_selection_done in class Widget

gtk_style_updated

long gtk_style_updated(long widget)

Overrides:

gtk_style_updated in class Composite

indexOf

public int indexOf(String string)

Searches the receiver's list starting at the first item (index 0) until an item is found that is equal to the argument, and returns the index of that item. If no item is found, returns -1.

Parameters:

string - the search item

Returns:

the index of the item

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the string is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

indexOf

public int indexOf(String string,
 int start)

Searches the receiver's list starting at the given, zero-relative index until an item is found that is equal to the argument, and returns the index of that item. If no item is found or the starting index is out of range, returns -1.

Parameters:

string - the search item

start - the zero-relative index at which to begin the search

Returns:

the index of the item

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the string is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

isFocusHandle

boolean isFocusHandle(long widget)

Overrides:

isFocusHandle in class Control

paintSurface

long paintSurface()

Overrides:

paintSurface in class Control

paste

public void paste()

Pastes text from clipboard.

The selected text is deleted from the widget and new text inserted from the clipboard.

Note: Pasting data to controls may occurs asynchronously. The widget text may not reflect the updated value immediately after calling this method. The new text will appear once pending events are processed in the event loop. Use Display.asyncExec(Runnable) before accessing getText().

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

2.1

parentingHandle

long parentingHandle()

Overrides:

parentingHandle in class Composite

register

void register()

Overrides:

register in class Composite

releaseHandle

void releaseHandle()

Overrides:

releaseHandle in class Composite

releaseWidget

void releaseWidget()

Overrides:

releaseWidget in class Composite

remove

public void remove(int index)

Removes the item from the receiver's list at the given zero-relative index.

Parameters:

index - the index for the item

Throws:

IllegalArgumentException -

• ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

remove

public void remove(int start,
 int end)

Removes the items from the receiver's list which are between the given zero-relative start and end indices (inclusive).

Parameters:

start - the start of the range

end - the end of the range

Throws:

IllegalArgumentException -

• ERROR_INVALID_RANGE - if either the start or end are not between 0 and the number of elements in the list minus 1 (inclusive)

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

remove

public void remove(String string)

Searches the receiver's list starting at the first item until an item is found that is equal to the argument, and removes that item from the list.

Parameters:

string - the item to remove

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the string is null
• ERROR_INVALID_ARGUMENT - if the string is not found in the list

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

removeAll

public void removeAll()

Removes all of the items from the receiver's list and clear the contents of receiver's text field.

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

removeModifyListener

public void removeModifyListener(ModifyListener listener)

Removes the listener from the collection of listeners who will be notified when the receiver's text is modified.

Parameters:

listener - the listener which should no longer be notified

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

• ModifyListener
• addModifyListener(ModifyListener)

removeSegmentListener

public void removeSegmentListener(SegmentListener listener)

Removes the listener from the collection of listeners who will be notified when the receiver's text is modified.

Parameters:

listener - the listener which should no longer be notified

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

3.103

See Also:

• SegmentEvent
• SegmentListener
• addSegmentListener(SegmentListener)

removeSelectionListener

public void removeSelectionListener(SelectionListener listener)

Removes the listener from the collection of listeners who will be notified when the user changes the receiver's selection.

Parameters:

listener - the listener which should no longer be notified

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

• SelectionListener
• addSelectionListener(SelectionListener)

removeVerifyListener

public void removeVerifyListener(VerifyListener listener)

Removes the listener from the collection of listeners who will be notified when the control is verified.

Parameters:

listener - the listener which should no longer be notified

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

3.1

See Also:

• VerifyListener
• addVerifyListener(VerifyListener)

select

public void select(int index)

Selects the item at the given zero-relative index in the receiver's list. If the item at the index was already selected, it remains selected. Indices that are out of range are ignored.

Parameters:

index - the index of the item to select

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setBackgroundGdkRGBA

void setBackgroundGdkRGBA(long context,
 long handle,
 GdkRGBA rgba)

Overrides:

setBackgroundGdkRGBA in class Control

setBounds

int setBounds(int x,
 int y,
 int width,
 int height,
 boolean move,
 boolean resize)

Overrides:

setBounds in class Composite

setButtonHandle

void setButtonHandle(long widget)

setMenuHandle

void setMenuHandle(long widget)

setFontDescription

void setFontDescription(long font)

Overrides:

setFontDescription in class Control

setForegroundGdkRGBA

void setForegroundGdkRGBA(long handle,
 GdkRGBA rgba)

Overrides:

setForegroundGdkRGBA in class Control

setInitialBounds

void setInitialBounds()

Overrides:

setInitialBounds in class Control

setItem

public void setItem(int index,
 String string)

Sets the text of the item in the receiver's list at the given zero-relative index to the string argument.

Parameters:

index - the index for the item

string - the new text for the item

Throws:

IllegalArgumentException -

• ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)
• ERROR_NULL_ARGUMENT - if the string is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setItems

public void setItems(String... items)

Sets the receiver's list to be the given array of items.

Parameters:

items - the array of items

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the items array is null
• ERROR_INVALID_ARGUMENT - if an item in the items array is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

gtk_combo_box_text_remove_all

private void gtk_combo_box_text_remove_all()

setListVisible

public void setListVisible(boolean visible)

Marks the receiver's list as visible if the argument is true, and marks it invisible otherwise.

If one of the receiver's ancestors is not visible or some other condition makes the receiver not visible, marking it visible may not actually cause it to be displayed.

Parameters:

visible - the new visibility state

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

3.4

setOrientation

void setOrientation(boolean create)

Overrides:

setOrientation in class Composite

setOrientation

public void setOrientation(int orientation)

Sets the orientation of the receiver, which must be one of the constants SWT.LEFT_TO_RIGHT or SWT.RIGHT_TO_LEFT.

Overrides:

setOrientation in class Control

Parameters:

orientation - new orientation style

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

2.1.2

setSelection

public void setSelection(Point selection)

Sets the selection in the receiver's text field to the range specified by the argument whose x coordinate is the start of the selection and whose y coordinate is the end of the selection.

Parameters:

selection - a point representing the new selection start and end

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the point is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setText

public void setText(String string)

Sets the contents of the receiver's text field to the given string.

This call is ignored when the receiver is read only and the given string is not in the receiver's list.

Note: The text field in a Combo is typically only capable of displaying a single line of text. Thus, setting the text to a string containing line breaks or other special characters will probably cause it to display incorrectly.

Also note, if control characters like '\n', '\t' etc. are used in the string, then the behavior is platform dependent.

Parameters:

string - the new text

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the string is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setTextLimit

public void setTextLimit(int limit)

Sets the maximum number of characters that the receiver's text field is capable of holding to be the argument.

To reset this value to the default, use setTextLimit(Combo.LIMIT). Specifying a limit value larger than Combo.LIMIT sets the receiver's limit to Combo.LIMIT.

Parameters:

limit - new text limit

Throws:

IllegalArgumentException -

• ERROR_CANNOT_BE_ZERO - if the limit is zero

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

• LIMIT

setToolTipText

void setToolTipText(Shell shell,
 String newString)

Overrides:

setToolTipText in class Control

setVisibleItemCount

public void setVisibleItemCount(int count)

Sets the number of items that are visible in the drop down portion of the receiver's list.

Note: This operation is a hint and is not supported on platforms that do not have this concept.

Parameters:

count - the new number of items to be visible

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

Since:

3.0

checkSubwindow

boolean checkSubwindow()

Overrides:

checkSubwindow in class Composite

translateTraversal

boolean translateTraversal(long event)

Overrides:

translateTraversal in class Composite

updateCss

void updateCss()

verifyText

String verifyText(String string,
 int start,
 int end)