/*******************************************************************************
* Copyright (c) 2000, 2011 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.photon.*;
import org.eclipse.swt.widgets.TabItem;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.events.*;
/**
* Instances of this class implement the notebook user interface
* metaphor. It allows the user to select a notebook page from
* set of pages.
* <p>
* The item children that may be added to instances of this class
* must be of type <code>TabItem</code>.
* <code>Control</code> children are created and then set into a
* tab item using <code>TabItem#setControl</code>.
* </p><p>
* Note that although this class is a subclass of <code>Composite</code>,
* it does not make sense to set a layout on it.
* </p><p>
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>TOP, BOTTOM</dd>
* <dt><b>Events:</b></dt>
* <dd>Selection</dd>
* </dl>
* <p>
* Note: Only one of the styles TOP and BOTTOM may be specified.
* </p><p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#tabfolder">TabFolder, TabItem 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 TabFolder extends Composite {
int parentingHandle;
TabItem [] items;
int itemCount, currentIndex = OS.Pt_PG_INVALID;
/**
* 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
* @see SWT#TOP
* @see SWT#BOTTOM
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public TabFolder (Composite parent, int style) {
super (parent, checkStyle (style));
}
static int checkStyle (int style) {
style = checkBits (style, SWT.TOP, SWT.BOTTOM, 0, 0, 0, 0);
/*
* Even though it is legal to create this widget
* with scroll bars, they serve no useful purpose
* because they do not automatically scroll the
* widget's client area. The fix is to clear
* the SWT style.
*/
return style & ~(SWT.H_SCROLL | SWT.V_SCROLL);
}
/**
* 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 <code>SelectionListener</code>
* interface.
* <p>
* When <code>widgetSelected</code> is called, the item field of the event object is valid.
* <code>widgetDefaultSelected</code> is not called.
* </p>
*
* @param listener the listener which should be notified when the user changes the receiver's selection
*
* @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);
}
protected void checkSubclass () {
if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget();
PhDim_t dim = new PhDim_t();
if (!OS.PtWidgetIsRealized (handle)) OS.PtExtentWidget (handle);
OS.PtWidgetPreferredSize(handle, dim);
int width = dim.w, height = dim.h;
Point size;
if (layout != null) {
changed |= (state & LAYOUT_CHANGED) != 0;
size = layout.computeSize (this, wHint, hHint, changed);
state &= ~LAYOUT_CHANGED;
} else {
size = minimumSize (wHint, hHint, changed);
}
if (size.x == 0) size.x = DEFAULT_WIDTH;
if (size.y == 0) size.y = DEFAULT_HEIGHT;
if (wHint != SWT.DEFAULT) size.x = wHint;
if (hHint != SWT.DEFAULT) size.y = hHint;
width = Math.max (width, size.x);
height = Math.max (height, size.y);
Rectangle trim = computeTrim (0, 0, width, height);
width = trim.width; height = trim.height;
return new Point (width, height);
}
public Rectangle computeTrim (int x, int y, int width, int height) {
checkWidget();
PhDim_t dim = new PhDim_t();
if (!OS.PtWidgetIsRealized (handle)) OS.PtExtentWidget (handle);
OS.PtWidgetPreferredSize(handle, dim);
int [] args = {
OS.Pt_ARG_MARGIN_BOTTOM, 0, 0, // 1
OS.Pt_ARG_MARGIN_TOP, 0, 0, // 4
OS.Pt_ARG_MARGIN_RIGHT, 0, 0, // 7
OS.Pt_ARG_MARGIN_LEFT, 0, 0, // 10
// OS.Pt_ARG_BASIC_FLAGS, 0, 0, // 13
};
OS.PtGetResources(handle, args.length / 3, args);
int trimX = x - args [10];
int trimY;
if ((style & SWT.BOTTOM) != 0) {
trimY = y - args [4];
} else {
trimY = y - (dim.h - args [1]);
}
int trimWidth = width + args [7] + args [10];
int trimHeight = height + dim.h;
return new Rectangle (trimX, trimY, trimWidth, trimHeight);
}
void createHandle (int index) {
state |= HANDLE;
int parentHandle = parent.parentingHandle ();
int [] args = {
OS.Pt_ARG_RESIZE_FLAGS, 0, OS.Pt_RESIZE_XY_BITS,
};
parentingHandle = OS.PtCreateWidget (OS.PtContainer (), parentHandle, args.length / 3, args);
if (parentingHandle == 0) error (SWT.ERROR_NO_HANDLES);
int clazz = display.PtPanelGroup;
args = new int []{
OS.Pt_ARG_RESIZE_FLAGS, 0, OS.Pt_RESIZE_XY_BITS,
OS.Pt_ARG_PG_FLAGS, (style & SWT.BOTTOM) != 0 ? OS.Pt_PG_SELECTOR_ON_BOTTOM : 0, OS.Pt_PG_SELECTOR_ON_BOTTOM,
};
handle = OS.PtCreateWidget (clazz, parentingHandle, args.length / 3, args);
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
}
void createWidget (int index) {
super.createWidget (index);
items = new TabItem [4];
}
void createItem (TabItem item, int index) {
int count = itemCount;
if (!(0 <= index && index <= count)) error (SWT.ERROR_INVALID_RANGE);
if (count == items.length) {
TabItem [] newItems = new TabItem [items.length + 4];
System.arraycopy (items, 0, newItems, 0, items.length);
items = newItems;
}
int [] args = {OS.Pt_ARG_PG_PANEL_TITLES, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
int oldPtr = args [1];
int newPtr = OS.malloc ((count + 1) * 4);
if (newPtr == 0) error (SWT.ERROR_ITEM_NOT_ADDED);
int j = 0;
int [] str = new int [1];
int [] address = new int [1];
for (int i=0; i<=count; i++) {
if (i == index) {
str [0] = OS.malloc (1);
OS.memset(str [0], 0, 1);
} else {
OS.memmove (address, oldPtr + (j++ * 4), 4);
str [0] = OS.strdup (address [0]);
}
if (str [0] == 0) error (SWT.ERROR_ITEM_NOT_ADDED);
OS.memmove (newPtr + (i * 4), str, 4);
}
OS.PtSetResource (handle, OS.Pt_ARG_PG_PANEL_TITLES, newPtr, count + 1);
for (int i=0; i<=count; i++) {
OS.memmove (address, newPtr + (i * 4), 4);
OS.free (address [0]);
}
OS.free (newPtr);
System.arraycopy (items, index, items, index + 1, count - index);
items [index] = item;
itemCount++;
}
void deregister () {
super.deregister ();
if (parentingHandle != 0) WidgetTable.remove (parentingHandle);
}
void destroyItem (TabItem item) {
int count = itemCount;
int index = 0;
while (index < count) {
if (items [index] == item) break;
index++;
}
int [] args = {OS.Pt_ARG_PG_PANEL_TITLES, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
int oldPtr = args [1];
int newPtr = OS.malloc ((count - 1) * 4);
if (newPtr == 0) error (SWT.ERROR_ITEM_NOT_ADDED);
int j = 0;
int [] str = new int [1];
int [] address = new int [1];
for (int i=0; i<count; i++) {
if (i == index) continue;
OS.memmove (address, oldPtr + (i * 4), 4);
str [0] = OS.strdup (address [0]);
if (str [0] == 0) error (SWT.ERROR_ITEM_NOT_ADDED);
OS.memmove (newPtr + (j++ * 4), str, 4);
}
OS.PtSetResource (handle, OS.Pt_ARG_PG_PANEL_TITLES, newPtr, count - 1);
for (int i=0; i<count-1; i++) {
OS.memmove (address, newPtr + (i * 4), 4);
OS.free (address [0]);
}
OS.free (newPtr);
if (index != count) {
System.arraycopy (items, index + 1, items, index, --count - index);
}
items [count] = null;
itemCount--;
}
public Rectangle getClientArea () {
checkWidget();
PhArea_t area = new PhArea_t ();
if (!OS.PtWidgetIsRealized (handle)) OS.PtExtentWidgetFamily (handle);
int clientHandle = OS.PtWidgetChildBack (handle);
OS.PtWidgetArea (clientHandle, area);
int args[] = {
OS.Pt_ARG_MARGIN_RIGHT, 0, 0,
OS.Pt_ARG_MARGIN_BOTTOM, 0, 0,
};
OS.PtGetResources (handle, args.length / 3, args);
PhArea_t parentArea = new PhArea_t();
OS.PtWidgetArea(handle, parentArea);
int deltaX = area.pos_x - parentArea.pos_x;
int deltaY = area.pos_y - parentArea.pos_y;
area.size_w = (short) (parentArea.size_w - ( deltaX + args[1]));
area.size_h = (short) (parentArea.size_h - ( deltaY + args [4]));
return new Rectangle (area.pos_x, area.pos_y, area.size_w, area.size_h);
}
/**
* Returns the item at the given, zero-relative index in the
* receiver. Throws an exception if the index is out of range.
*
* @param index the index of the item to return
* @return the item at the given index
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</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 TabItem getItem (int index) {
checkWidget();
if (!(0 <= index && index < itemCount)) error (SWT.ERROR_INVALID_RANGE);
return items [index];
}
/**
* Returns the tab item at the given point in the receiver
* or null if no such item exists. The point is in the
* coordinate system of the receiver.
*
* @param point the point used to locate the item
* @return the tab item at the given point, or null if the point is not in a tab item
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the point 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>
*
* @since 3.4
*/
public TabItem getItem (Point point) {
checkWidget();
if (point == null) error (SWT.ERROR_NULL_ARGUMENT);
for (int index = 0; index < itemCount; index++) {
TabItem item = items[index];
Rectangle bounds = item.getBounds();
if (bounds.contains(point)) return item;
}
return null;
}
/**
* Returns an array of <code>TabItem</code>s which are the items
* in the receiver.
* <p>
* 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.
* </p>
*
* @return the items in the receiver
*
* @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 TabItem [] getItems () {
checkWidget();
TabItem [] result = new TabItem [itemCount];
System.arraycopy (items, 0, result, 0, result.length);
return result;
}
/**
* Returns the number of items contained in the receiver.
*
* @return the number of items
*
* @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 getItemCount () {
checkWidget();
return itemCount;
}
/**
* Returns an array of <code>TabItem</code>s that are currently
* selected in the receiver. An empty array indicates that no
* items are selected.
* <p>
* Note: This is not the actual structure used by the receiver
* to maintain its selection, so modifying the array will
* not affect the receiver.
* </p>
* @return an array representing the selection
*
* @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 TabItem [] getSelection () {
checkWidget();
int index = getSelectionIndex ();
if (index == -1) return new TabItem [0];
return new TabItem [] {items [index]};
}
/**
* Returns the zero-relative index of the item which is currently
* selected in the receiver, or -1 if no item is selected.
*
* @return the index of the selected item
*
* @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 getSelectionIndex () {
checkWidget();
int index;
if (currentIndex != OS.Pt_PG_INVALID && !OS.PtWidgetIsRealized (handle)) {
index = currentIndex;
} else {
int [] args = {OS.Pt_ARG_PG_CURRENT_INDEX, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
index = args [1];
}
return index == OS.Pt_PG_INVALID ? -1 : index;
}
void hookEvents () {
super.hookEvents ();
int windowProc = display.windowProc;
OS.PtAddCallback (handle, OS.Pt_CB_PG_PANEL_SWITCHING, windowProc, OS.Pt_CB_PG_PANEL_SWITCHING);
OS.PtAddCallback (handle, OS.Pt_CB_REALIZED, windowProc, OS.Pt_CB_REALIZED);
}
/**
* 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.
*
* @param item the search item
* @return the index of the item
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the item 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 int indexOf (TabItem item) {
checkWidget();
if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
for (int i=0; i<itemCount; i++) {
if (items [i] == item) return i;
}
return -1;
}
Point minimumSize (int wHint, int hHint, boolean flushCache) {
Control [] children = _getChildren ();
int width = 0, height = 0;
for (int i=0; i<children.length; i++) {
Control child = children [i];
int index = 0;
while (index < itemCount) {
if (items [index].control == child) break;
index++;
}
if (index == itemCount) {
Rectangle rect = child.getBounds ();
width = Math.max (width, rect.x + rect.width);
height = Math.max (height, rect.y + rect.height);
} else {
Point size = child.computeSize (wHint, hHint, flushCache);
width = Math.max (width, size.x);
height = Math.max (height, size.y);
}
}
return new Point (width, height);
}
void moveToBack (int child) {
OS.PtWidgetInsert (child, handle, 0);
}
int parentingHandle () {
return parentingHandle;
}
int Pt_CB_PG_PANEL_SWITCHING (int widget, int info) {
if (info == 0) return OS.Pt_CONTINUE;
PtCallbackInfo_t cbinfo = new PtCallbackInfo_t ();
OS.memmove (cbinfo, info, PtCallbackInfo_t.sizeof);
short[] oldIndex = new short[1];
short[] newIndex = new short[1];
OS.memmove(oldIndex, cbinfo.cbdata + 8, 2);
OS.memmove(newIndex, cbinfo.cbdata + 10, 2);
Control oldControl = null;
int index = oldIndex [0];
TabItem oldItem = items [index];
if (0 <= index && index < itemCount) oldControl = oldItem.control;
Control newControl = null;
index = newIndex [0];
TabItem newItem = items [index];
if (0 <= index && index < itemCount) newControl = newItem.control;
if (oldControl != null && !oldControl.isDisposed()) oldControl.setVisible (false);
if (newControl != null && !newControl.isDisposed()) {
newControl.setBounds (getClientArea ());
newControl.setVisible (true);
}
Event event = new Event ();
event.item = newItem;
postEvent (SWT.Selection, event);
return OS.Pt_CONTINUE;
}
int Pt_CB_REALIZED (int widget, int info) {
int result = super.Pt_CB_REALIZED (widget, info);
if (currentIndex != OS.Pt_PG_INVALID) {
if (info == 0) return OS.Pt_END;
PtCallbackInfo_t cbinfo = new PtCallbackInfo_t ();
OS.memmove (cbinfo, info, PtCallbackInfo_t.sizeof);
if (cbinfo.reason == OS.Pt_CB_REALIZED) {
setSelection (currentIndex, false);
currentIndex = OS.Pt_PG_INVALID;
}
}
return result;
}
void register () {
super.register ();
if (parentingHandle != 0) WidgetTable.put (parentingHandle, this);
}
void releaseHandle () {
super.releaseHandle ();
parentingHandle = 0;
}
void releaseChildren (boolean destroy) {
if (items != null) {
for (int i=0; i<itemCount; i++) {
TabItem item = items [i];
if (item != null && !item.isDisposed ()) {
item.release (false);
}
}
itemCount = 0;
items = null;
}
super.releaseChildren (destroy);
}
void removeControl (Control control) {
super.removeControl (control);
for (int i=0; i<itemCount; i++) {
TabItem item = items [i];
if (item.control == control) item.setControl (null);
}
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the user changes the receiver's selection.
*
* @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);
}
void reskinChildren (int flags) {
if (items != null) {
for (int i=0; i<itemCount; i++) {
TabItem item = items [i];
if (item != null) item.reskin (flags);
}
}
super.reskinChildren (flags);
}
int setBounds (int x, int y, int width, int height, boolean move, boolean resize, boolean events) {
int result = super.setBounds (x, y, width, height, move, resize, events);
if ((result & RESIZED) != 0) {
int [] args = {OS.Pt_ARG_WIDTH, 0, 0, OS.Pt_ARG_HEIGHT, 0, 0};
OS.PtGetResources (parentingHandle, args.length / 3, args);
OS.PtSetResources (handle, args.length / 3, args);
int index = getSelectionIndex ();
if (index != -1) {
TabItem item = items [index];
Control control = item.control;
if (control != null && !control.isDisposed ()) {
control.setBounds (getClientArea ());
}
}
}
return result;
}
/**
* Selects the item at the given zero-relative index in the receiver.
* If the item at the index was already selected, it remains selected.
* The current selection is first cleared, then the new items are
* selected. Indices that are out of range are ignored.
*
* @param index the index of the item to select
*
* @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 (int index) {
checkWidget();
if (!(0 <= index && index < itemCount)) return;
setSelection (index, false);
}
void setSelection (int index, boolean notify) {
int [] args = {OS.Pt_ARG_PG_CURRENT_INDEX, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
int oldIndex = args [1];
if (oldIndex != OS.Pt_PG_INVALID) {
TabItem item = items [oldIndex];
Control control = item.control;
if (control != null && !control.isDisposed ()) {
control.setVisible (false);
}
}
if (index == -1) index = OS.Pt_PG_INVALID;
OS.PtSetResource (handle, OS.Pt_ARG_PG_CURRENT_INDEX, index, 0);
args [1] = 0;
OS.PtGetResources (handle, args.length / 3, args);
int newIndex = args [1];
/*
* Bug in Photon. Pt_ARG_PG_CURRENT_INDEX cannot be set if
* the widget is not realized. The fix is to remember the current
* index and reset it when the widget is realized.
*/
if (!OS.PtWidgetIsRealized (handle)) {
newIndex = currentIndex = index;
}
if (newIndex != OS.Pt_PG_INVALID) {
TabItem item = items [newIndex];
Control control = item.control;
if (control != null && !control.isDisposed ()) {
control.setBounds (getClientArea ());
control.setVisible (true);
}
if (notify) {
Event event = new Event ();
event.item = item;
postEvent (SWT.Selection, event);
}
}
}
/**
* Sets the receiver's selection to the given item.
* The current selected is first cleared, then the new item is
* selected.
*
* @param item the item to select
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the item 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>
*
* @since 3.2
*/
public void setSelection (TabItem item) {
checkWidget ();
if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
setSelection (new TabItem [] {item});
}
/**
* Sets the receiver's selection to be the given array of items.
* The current selected is first cleared, then the new items are
* selected.
*
* @param items the array of items
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the items array 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 setSelection (TabItem [] items) {
checkWidget();
if (items == null) error (SWT.ERROR_NULL_ARGUMENT);
if (items.length == 0) {
setSelection (-1, false);
} else {
for (int i=items.length-1; i>=0; --i) {
int index = indexOf (items [i]);
if (index != -1) setSelection (index, false);
}
}
}
boolean traversePage (boolean next) {
int count = getItemCount ();
if (count == 0) return false;
int index = getSelectionIndex ();
if (index == -1) {
index = 0;
} else {
int offset = next ? 1 : -1;
index = (index + offset + count) % count;
}
setSelection (index, true);
return true;
}
int topHandle () {
return parentingHandle;
}
int widgetClass () {
return OS.PtPanelGroup ();
}
}