/*******************************************************************************
* Copyright (c) 2000, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.internal.wpf.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.events.*;
/**
* Instances of this class represent a selectable user interface object that
* issues notification when pressed and released.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>ARROW, CHECK, PUSH, RADIO, TOGGLE, FLAT</dd>
* <dd>UP, DOWN, LEFT, RIGHT, CENTER</dd>
* <dt><b>Events:</b></dt>
* <dd>Selection</dd>
* </dl>
* <p>
* Note: Only one of the styles ARROW, CHECK, PUSH, RADIO, and TOGGLE
* may be specified.
* </p><p>
* Note: Only one of the styles LEFT, RIGHT, and CENTER may be specified.
* </p><p>
* Note: Only one of the styles UP, DOWN, LEFT, and RIGHT may be specified
* when the ARROW style is specified.
* </p><p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#button">Button snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Button extends Control {
String text = "";
Image image;
int textHandle, imageHandle;
boolean ignoreSelection, grayed;
/**
* Constructs a new instance of this class given its parent
* and a style value describing its behavior and appearance.
* <p>
* The style value is either one of the style constants defined in
* class <code>SWT</code> which is applicable to instances of this
* class, or must be built by <em>bitwise OR</em>'ing together
* (that is, using the <code>int</code> "|" operator) two or more
* of those <code>SWT</code> style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
* </p>
*
* @param parent a composite control which will be the parent of the new instance (cannot be null)
* @param style the style of control to construct
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see SWT#ARROW
* @see SWT#CHECK
* @see SWT#PUSH
* @see SWT#RADIO
* @see SWT#TOGGLE
* @see SWT#FLAT
* @see SWT#UP
* @see SWT#DOWN
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#CENTER
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Button (Composite parent, int style) {
super (parent, checkStyle (style));
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the control is selected by the user, by sending
* it one of the messages defined in the <code>SelectionListener</code>
* interface.
* <p>
* <code>widgetSelected</code> is called when the control is selected by the user.
* <code>widgetDefaultSelected</code> is not called.
* </p>
* <p>
* When the <code>SWT.RADIO</code> style bit is set, the <code>widgetSelected</code> method is
* also called when the receiver loses selection because another item in the same radio group
* was selected by the user. During <code>widgetSelected</code> the application can use
* <code>getSelection()</code> to determine the current selected state of the receiver.
* </p>
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener (SelectionListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Selection,typedListener);
addListener (SWT.DefaultSelection,typedListener);
}
static int checkStyle (int style) {
style = checkBits (style, SWT.PUSH, SWT.ARROW, SWT.CHECK, SWT.RADIO, SWT.TOGGLE, 0);
if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0) {
return checkBits (style, SWT.CENTER, SWT.LEFT, SWT.RIGHT, 0, 0, 0);
}
if ((style & (SWT.CHECK | SWT.RADIO)) != 0) {
return checkBits (style, SWT.LEFT, SWT.RIGHT, SWT.CENTER, 0, 0, 0);
}
if ((style & SWT.ARROW) != 0) {
style |= SWT.NO_FOCUS;
return checkBits (style, SWT.UP, SWT.DOWN, SWT.LEFT, SWT.RIGHT, 0, 0);
}
return style;
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget ();
Point size = computeSize (handle, wHint, hHint, changed);
if ((style & SWT.ARROW) == 0) {
int border = getBorderWidth ();
size.x += border * 2;
size.y += border * 2;
}
return size;
}
void createArrow () {
int geometry = OS.gcnew_StreamGeometry ();
int context = OS.StreamGeometry_Open (geometry);
int start = 0, point = 0, end = 0;
int mask = SWT.RIGHT | SWT.LEFT | SWT.DOWN | SWT.UP;
switch (style & mask) {
case SWT.RIGHT:
start = OS.gcnew_Point (1, 0);
point = OS.gcnew_Point (4, 3);
end = OS.gcnew_Point (1, 6);
break;
case SWT.LEFT:
start = OS.gcnew_Point (4, 1);
point = OS.gcnew_Point (1, 3);
end = OS.gcnew_Point (4, 6);
break;
case SWT.DOWN:
start = OS.gcnew_Point (0, 1);
point = OS.gcnew_Point (3, 4);
end = OS.gcnew_Point (6, 1);
break;
case SWT.UP:
start = OS.gcnew_Point (0, 4);
point = OS.gcnew_Point (3, 1);
end = OS.gcnew_Point (6, 4);
break;
}
OS.StreamGeometryContext_BeginFigure (context, start, true, true);
OS.StreamGeometryContext_LineTo (context, point, true, true);
OS.StreamGeometryContext_LineTo (context, end, true, true);
OS.StreamGeometryContext_Close (context);
int path = OS.gcnew_Path ();
OS.Path_Data (path, geometry);
int padding = OS.gcnew_Thickness (3, 3, 3, 3);
OS.FrameworkElement_Margin (path, padding);
int brush = OS.Brushes_Black ();
OS.Path_Fill (path, brush);
OS.FrameworkElement_Width (path, 6);
OS.FrameworkElement_Height (path, 6);
OS.FrameworkElement_HorizontalAlignment (path, OS.HorizontalAlignment_Center);
OS.FrameworkElement_VerticalAlignment (path, OS.VerticalAlignment_Center);
OS.ContentControl_Content (handle, path);
OS.GCHandle_Free (padding);
OS.GCHandle_Free (start);
OS.GCHandle_Free (point);
OS.GCHandle_Free (end);
OS.GCHandle_Free (brush);
OS.GCHandle_Free (path);
OS.GCHandle_Free (context);
OS.GCHandle_Free (geometry);
}
void createHandle () {
if ((style & SWT.PUSH) == 0) state |= THEME_BACKGROUND;
int bits = SWT.TOGGLE | SWT.ARROW | SWT.PUSH | SWT.RADIO | SWT.CHECK;
switch (style & bits) {
case SWT.TOGGLE:
handle = OS.gcnew_ToggleButton ();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
break;
case SWT.ARROW:
handle = OS.gcnew_Button ();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
createArrow ();
break;
case SWT.RADIO:
handle = OS.gcnew_RadioButton ();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
break;
case SWT.CHECK:
handle = OS.gcnew_CheckBox ();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
break;
case SWT.PUSH:
default:
handle = OS.gcnew_Button ();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
break;
}
if ((style & SWT.ARROW) != 0) return;
int value = OS.HorizontalAlignment_Left;
if ((style & SWT.CENTER) != 0) value = OS.HorizontalAlignment_Center;
if ((style & SWT.RIGHT) != 0) value = OS.HorizontalAlignment_Right;
OS.Control_HorizontalContentAlignment (handle, value);
imageHandle = OS.gcnew_Image ();
if (imageHandle == 0) error (SWT.ERROR_NO_HANDLES);
OS.Image_Stretch (imageHandle, OS.Stretch_None);
OS.UIElement_Visibility (imageHandle, OS.Visibility_Collapsed);
textHandle = OS.gcnew_AccessText ();
if (textHandle == 0) error (SWT.ERROR_NO_HANDLES);
OS.FrameworkElement_VerticalAlignment (textHandle, OS.VerticalAlignment_Center);
int panel = OS.gcnew_StackPanel ();
if (panel == 0) error (SWT.ERROR_NO_HANDLES);
OS.StackPanel_Orientation (panel, OS.Orientation_Horizontal);
int thickness = OS.gcnew_Thickness (1, 1, 1, 1);
if (thickness == 0) error (SWT.ERROR_NO_HANDLES);
OS.FrameworkElement_Margin (panel, thickness);
OS.GCHandle_Free(thickness);
int children = OS.Panel_Children (panel);
OS.UIElementCollection_Add (children, imageHandle);
OS.UIElementCollection_Add (children, textHandle);
OS.ContentControl_Content (handle, panel);
OS.GCHandle_Free (children);
OS.GCHandle_Free (panel);
}
int defaultBackground () {
if ((style & SWT.PUSH) == 0) return OS.SystemColors_ControlColor;
return 0;
}
/**
* Returns a value which describes the position of the
* text or image in the receiver. The value will be one of
* <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>
* unless the receiver is an <code>ARROW</code> button, in
* which case, the alignment will indicate the direction of
* the arrow (one of <code>LEFT</code>, <code>RIGHT</code>,
* <code>UP</code> or <code>DOWN</code>).
*
* @return the alignment
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getAlignment () {
checkWidget ();
if ((style & SWT.ARROW) != 0) {
if ((style & SWT.UP) != 0) return SWT.UP;
if ((style & SWT.DOWN) != 0) return SWT.DOWN;
if ((style & SWT.LEFT) != 0) return SWT.LEFT;
if ((style & SWT.RIGHT) != 0) return SWT.RIGHT;
return SWT.UP;
}
if ((style & SWT.LEFT) != 0) return SWT.LEFT;
if ((style & SWT.CENTER) != 0) return SWT.CENTER;
if ((style & SWT.RIGHT) != 0) return SWT.RIGHT;
return SWT.LEFT;
}
/**
* Returns <code>true</code> if the receiver is grayed,
* and false otherwise. When the widget does not have
* the <code>CHECK</code> style, return false.
*
* @return the grayed state of the checkbox
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.4
*/
public boolean getGrayed () {
checkWidget ();
if ((style & SWT.CHECK) == 0) return false;
return grayed;
}
/**
* Returns the receiver's image if it has one, or null
* if it does not.
*
* @return the receiver's image
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Image getImage () {
checkWidget ();
return image;
}
String getNameText () {
return getText ();
}
/**
* Returns <code>true</code> if the receiver is selected,
* and false otherwise.
* <p>
* When the receiver is of type <code>CHECK</code> or <code>RADIO</code>,
* it is selected when it is checked. When it is of type <code>TOGGLE</code>,
* it is selected when it is pushed in. If the receiver is of any other type,
* this method returns false.
*
* @return the selection state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public boolean getSelection () {
checkWidget ();
if ((style & (SWT.CHECK | SWT.RADIO | SWT.TOGGLE)) == 0) return false;
if ((style & SWT.CHECK) != 0 && grayed) {
int property = OS.ToggleButton_IsCheckedProperty();
int value = OS.DependencyObject_GetValue(handle, property);
OS.GCHandle_Free(property);
if (value == 0) return true;
OS.GCHandle_Free(value);
}
return OS.ToggleButton_IsChecked (handle);
}
/**
* Returns the receiver's text, which will be an empty
* string if it has never been set or if the receiver is
* an <code>ARROW</code> button.
*
* @return the receiver's text
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public String getText () {
checkWidget ();
if ((style & SWT.ARROW) != 0) return "";
return text;
}
void HandleClick (int sender, int e) {
if (!checkEvent (e)) return;
if ((style & SWT.CHECK) != 0) {
if (grayed) {
if (OS.ToggleButton_IsChecked (handle)) {
ignoreSelection = true;
OS.ToggleButton_IsCheckedNullSetter (handle);
ignoreSelection = false;
}
}
}
if (!ignoreSelection) postEvent (SWT.Selection);
}
void hookEvents () {
super.hookEvents ();
if ((style & (SWT.TOGGLE | SWT.RADIO | SWT.CHECK)) != 0) {
int handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleClick");
if (handler == 0) error (SWT.ERROR_NO_HANDLES);
OS.ToggleButton_Checked (handle, handler);
OS.GCHandle_Free (handler);
handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleClick");
if (handler == 0) error (SWT.ERROR_NO_HANDLES);
OS.ToggleButton_Unchecked (handle, handler);
OS.GCHandle_Free (handler);
} else {
int handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleClick");
if (handler == 0) error (SWT.ERROR_NO_HANDLES);
OS.ButtonBase_Click (handle, handler);
OS.GCHandle_Free (handler);
}
}
boolean mnemonicHit (char ch) {
//TODO
return false;
}
boolean mnemonicMatch (char key) {
return super.mnemonicMatch (textHandle, key);
}
void releaseHandle() {
super.releaseHandle ();
if (textHandle != 0) OS.GCHandle_Free (textHandle);
textHandle = 0;
if (imageHandle !=0 )OS.GCHandle_Free (imageHandle);
imageHandle = 0;
}
void releaseWidget () {
super.releaseWidget ();
text = null;
image = null;
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is selected by the user.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #addSelectionListener
*/
public void removeSelectionListener (SelectionListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Selection, listener);
eventTable.unhook (SWT.DefaultSelection,listener);
}
/**
* Controls how text, images and arrows will be displayed
* in the receiver. The argument should be one of
* <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>
* unless the receiver is an <code>ARROW</code> button, in
* which case, the argument indicates the direction of
* the arrow (one of <code>LEFT</code>, <code>RIGHT</code>,
* <code>UP</code> or <code>DOWN</code>).
*
* @param alignment the new alignment
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setAlignment (int alignment) {
checkWidget ();
if ((style & SWT.ARROW) != 0) {
if ((style & (SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT)) == 0) return;
style &= ~(SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT);
style |= alignment & (SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT);
createArrow ();
return;
}
if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return;
style &= ~(SWT.LEFT | SWT.RIGHT | SWT.CENTER);
style |= alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER);
int value = OS.HorizontalAlignment_Left;
if ((style & SWT.CENTER) != 0) value = OS.HorizontalAlignment_Center;
if ((style & SWT.RIGHT) != 0) value = OS.HorizontalAlignment_Right;
OS.Control_HorizontalContentAlignment (handle, value);
}
/**
* Sets the grayed state of the receiver. This state change
* only applies if the control was created with the SWT.CHECK
* style.
*
* @param grayed the new grayed state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.4
*/
public void setGrayed (boolean grayed) {
checkWidget ();
if ((style & SWT.CHECK) == 0) return;
boolean checked = getSelection();
this.grayed = grayed;
ignoreSelection = true;
if (checked){
if (grayed) {
OS.ToggleButton_IsCheckedNullSetter(handle);
} else {
OS.ToggleButton_IsChecked(handle, true);
}
}
setSelection (checked);
ignoreSelection = false;
}
void setDefault (boolean value) {
if ((style & SWT.PUSH) == 0) return;
OS.Button_IsDefault (handle, value);
}
/**
* Sets the receiver's image to the argument, which may be
* <code>null</code> indicating that no image should be displayed.
* <p>
* Note that a Button can display an image and text simultaneously
* on Windows (starting with XP), GTK+ and OSX. On other platforms,
* a Button that has an image and text set into it will display the
* image or text that was set most recently.
* </p>
* @param image the image to display on the receiver (may be <code>null</code>)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setImage (Image image) {
checkWidget ();
if (image != null && image.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT);
if ((style & SWT.ARROW) != 0) return;
this.image = image;
OS.Image_Source (imageHandle, image != null ? image.handle : 0);
OS.UIElement_Visibility (imageHandle, image != null ? OS.Visibility_Visible : OS.Visibility_Collapsed);
OS.UIElement_Visibility (textHandle, image != null && text.length () == 0 ? OS.Visibility_Collapsed : OS.Visibility_Visible);
int spacing = image != null && text.length ()!= 0 ? 3 : 0;
int margin = OS.gcnew_Thickness (0, 0, spacing, 0);
if (margin == 0) error (SWT.ERROR_NO_HANDLES);
OS.FrameworkElement_Margin (imageHandle, margin);
OS.GCHandle_Free (margin);
}
/**
* Sets the selection state of the receiver, if it is of type <code>CHECK</code>,
* <code>RADIO</code>, or <code>TOGGLE</code>.
*
* <p>
* When the receiver is of type <code>CHECK</code> or <code>RADIO</code>,
* it is selected when it is checked. When it is of type <code>TOGGLE</code>,
* it is selected when it is pushed in.
*
* @param selected the new selection state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setSelection (boolean selected) {
checkWidget ();
if ((style & (SWT.CHECK | SWT.RADIO | SWT.TOGGLE)) == 0) return;
ignoreSelection = true;
if ((style & SWT.CHECK) != 0 && grayed) {
OS.ToggleButton_IsCheckedNullSetter (handle);
} else {
OS.ToggleButton_IsChecked (handle, selected);
}
ignoreSelection = false;
}
/**
* Sets the receiver's text.
* <p>
* This method sets the button label. The label may include
* the mnemonic character but must not contain line delimiters.
* </p>
* <p>
* Mnemonics are indicated by an '&' that causes the next
* character to be the mnemonic. When the user presses a
* key sequence that matches the mnemonic, a selection
* event occurs. On most platforms, the mnemonic appears
* underlined but may be emphasized in a platform specific
* manner. The mnemonic indicator character '&' can be
* escaped by doubling it in the string, causing a single
* '&' to be displayed.
* </p><p>
* Note that a Button can display an image and text simultaneously
* on Windows (starting with XP), GTK+ and OSX. On other platforms,
* a Button that has an image and text set into it will display the
* image or text that was set most recently.
* </p>
* @param string the new text
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the text is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setText (String string) {
checkWidget ();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
if ((style & SWT.ARROW) != 0) return;
if (string.equals (text)) return;
text = string;
int strPtr = createDotNetString (text, true);
if (strPtr == 0) error (SWT.ERROR_NO_HANDLES);
OS.AccessText_Text (textHandle, strPtr);
OS.GCHandle_Free (strPtr);
OS.UIElement_Visibility (textHandle, string.length () == 0 && image != null ? OS.Visibility_Collapsed : OS.Visibility_Visible);
int spacing = image != null && text.length () != 0 ? 3 : 0;
int margin = OS.gcnew_Thickness (0, 0, spacing, 0);
if (margin == 0) error (SWT.ERROR_NO_HANDLES);
OS.FrameworkElement_Margin (imageHandle, margin);
OS.GCHandle_Free (margin);
}
int traversalCode (int key, int event) {
int code = super.traversalCode (key, event);
if ((style & SWT.ARROW) != 0) code &= ~(SWT.TRAVERSE_TAB_NEXT | SWT.TRAVERSE_TAB_PREVIOUS);
if ((style & SWT.RADIO) != 0) code |= SWT.TRAVERSE_ARROW_NEXT | SWT.TRAVERSE_ARROW_PREVIOUS;
return code;
}
}