| /******************************************************************************* |
| * 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.*; |
| import org.eclipse.swt.internal.photon.*; |
| 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 displays a list of strings and issues notification |
| * when a string is selected. A list may be single or multi select. |
| * <p> |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>SINGLE, MULTI</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Selection, DefaultSelection</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of SINGLE and MULTI 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/#list">List 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 List extends Scrollable { |
| |
| /** |
| * 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#SINGLE |
| * @see SWT#MULTI |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public List (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.SINGLE, SWT.MULTI, 0, 0, 0, 0); |
| } |
| |
| /** |
| * Adds the argument to the end of the receiver's list. |
| * |
| * @param string the new item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string 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 #add(String,int) |
| */ |
| public void add (String string) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| byte [] buffer = Converter.wcsToMbcs (null, string, true); |
| int ptr = OS.malloc (buffer.length); |
| OS.memmove (ptr, buffer, buffer.length); |
| OS.PtListAddItems (handle, new int [] {ptr}, 1, 0); |
| OS.free (ptr); |
| } |
| |
| /** |
| * 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> |
| * <code>widgetSelected</code> is called when the selection changes. |
| * <code>widgetDefaultSelected</code> is typically called when an item is double-clicked. |
| * </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); |
| } |
| |
| /** |
| * Adds the argument to the receiver's list at the given |
| * zero-relative index. |
| * <p> |
| * Note: To add an item at the end of the list, use the |
| * result of calling <code>getItemCount()</code> as the |
| * index or use <code>add(String)</code>. |
| * </p> |
| * |
| * @param string the new item |
| * @param index the index for the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list (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> |
| * |
| * @see #add(String) |
| */ |
| public void add (String string, int index) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (index == -1) error (SWT.ERROR_INVALID_RANGE); |
| byte [] buffer = Converter.wcsToMbcs (null, string, true); |
| int ptr = OS.malloc (buffer.length); |
| OS.memmove (ptr, buffer, buffer.length); |
| int result = OS.PtListAddItems (handle, new int [] {ptr}, 1, index + 1); |
| OS.free (ptr); |
| if (result != 0) { |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| if (0 <= index && index <= args [1]) error (SWT.ERROR_ITEM_NOT_ADDED); |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| } |
| |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget(); |
| |
| int [] args = new int [] { |
| OS.Pt_ARG_WIDTH, 0, 0, |
| OS.Pt_ARG_HEIGHT, 0, 0, |
| OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0, |
| }; |
| OS.PtGetResources (handle, args.length / 3, args); |
| int resizeFlags = OS.Pt_RESIZE_X_ALWAYS | OS.Pt_RESIZE_Y_ALWAYS; |
| OS.PtSetResource (handle, OS.Pt_ARG_RESIZE_FLAGS, resizeFlags, OS.Pt_RESIZE_XY_BITS); |
| if (!OS.PtWidgetIsRealized (handle)) OS.PtExtentWidgetFamily (handle); |
| PhDim_t dim = new PhDim_t (); |
| OS.PtWidgetPreferredSize (handle, dim); |
| int width = dim.w, height = dim.h; |
| OS.PtSetResource (handle, OS.Pt_ARG_RESIZE_FLAGS, 0, OS.Pt_RESIZE_XY_BITS); |
| OS.PtSetResources (handle, args.length / 3, args); |
| if (args [7] <= 0) { |
| width += DEFAULT_WIDTH; |
| height += DEFAULT_HEIGHT; |
| } |
| |
| if (wHint != SWT.DEFAULT || hHint != SWT.DEFAULT) { |
| PhRect_t rect = new PhRect_t (); |
| PhArea_t area = new PhArea_t (); |
| rect.lr_x = (short) (wHint - 1); |
| rect.lr_y = (short) (hHint - 1); |
| OS.PtSetAreaFromWidgetCanvas (handle, rect, area); |
| ScrollBar scroll; |
| if (wHint != SWT.DEFAULT) { |
| width = area.size_w; |
| if ((scroll = getVerticalBar()) != null) width += scroll.getSize ().x; |
| } |
| if (hHint != SWT.DEFAULT) { |
| height = area.size_h; |
| if ((scroll = getHorizontalBar()) != null) height += scroll.getSize ().y; |
| } |
| } |
| return new Point(width, height); |
| } |
| |
| void createHandle (int index) { |
| state |= HANDLE; |
| int clazz = display.PtList; |
| int parentHandle = parent.parentingHandle (); |
| int mode = OS.Pt_SELECTION_MODE_SINGLE | OS.Pt_SELECTION_MODE_AUTO; |
| if ((style & SWT.MULTI) != 0) { |
| if ((style & SWT.SIMPLE) != 0) { |
| mode = OS.Pt_SELECTION_MODE_MULTIPLE | OS.Pt_SELECTION_MODE_NOCLEAR |
| | OS.Pt_SELECTION_MODE_TOGGLE | OS.Pt_SELECTION_MODE_NOMOVE; |
| } else { |
| mode = OS.Pt_SELECTION_MODE_MULTIPLE | OS.Pt_SELECTION_MODE_AUTO; |
| } |
| } |
| mode |= OS.Pt_SELECTION_MODE_NOFOCUS; |
| boolean hasBorder = (style & SWT.BORDER) != 0; |
| int listFlags = OS.Pt_LIST_SCROLLBAR_ALWAYS | OS.Pt_LIST_SCROLLBAR_AS_REQUIRED; |
| int [] args = { |
| OS.Pt_ARG_FLAGS, hasBorder ? OS.Pt_HIGHLIGHTED : 0, OS.Pt_HIGHLIGHTED, |
| OS.Pt_ARG_SELECTION_MODE, mode, 0, |
| OS.Pt_ARG_FLAGS, OS.Pt_SELECTABLE | OS.Pt_SELECT_NOREDRAW, OS.Pt_SELECTABLE | OS.Pt_SELECT_NOREDRAW, |
| OS.Pt_ARG_LIST_FLAGS, (style & SWT.V_SCROLL) != 0 ? OS.Pt_LIST_SCROLLBAR_AS_REQUIRED : 0, listFlags, |
| OS.Pt_ARG_RESIZE_FLAGS, 0, OS.Pt_RESIZE_XY_BITS, |
| }; |
| handle = OS.PtCreateWidget (clazz, parentHandle, args.length / 3, args); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| createStandardScrollBars (); |
| } |
| |
| int defaultBackground () { |
| return display.LIST_BACKGROUND; |
| } |
| |
| byte [] defaultFont () { |
| return display.LIST_FONT; |
| } |
| |
| int defaultForeground () { |
| return display.LIST_FOREGROUND; |
| } |
| |
| /** |
| * Deselects the item at the given zero-relative index in the receiver. |
| * If the item at the index was already deselected, it remains |
| * deselected. Indices that are out of range are ignored. |
| * |
| * @param index the index of the item to deselect |
| * |
| * @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 deselect (int index) { |
| checkWidget(); |
| if (index < 0) return; |
| OS.PtListUnselectPos (handle, index + 1); |
| } |
| |
| /** |
| * Deselects the items at the given zero-relative indices in the receiver. |
| * If the item at the given zero-relative index in the receiver |
| * is selected, it is deselected. If the item at the index |
| * was not selected, it remains deselected. The range of the |
| * indices is inclusive. Indices that are out of range are ignored. |
| * |
| * @param start the start index of the items to deselect |
| * @param end the end index of the items to deselect |
| * |
| * @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 deselect (int start, int end) { |
| checkWidget(); |
| if (start > end) return; |
| if ((style & SWT.SINGLE) != 0) { |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| int count = args [1]; |
| int index = Math.min (count - 1, end); |
| if (index >= start) deselect (index); |
| return; |
| } |
| for (int i=start; i<=end; i++) { |
| OS.PtListUnselectPos (handle, i + 1); |
| } |
| } |
| |
| /** |
| * Deselects the items at the given zero-relative indices in the receiver. |
| * If the item at the given zero-relative index in the receiver |
| * is selected, it is deselected. If the item at the index |
| * was not selected, it remains deselected. Indices that are out |
| * of range and duplicate indices are ignored. |
| * |
| * @param indices the array of indices for the items to deselect |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the set of indices 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 deselect (int [] indices) { |
| checkWidget(); |
| if (indices == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (indices.length == 0) return; |
| for (int i=0; i<indices.length; i++) { |
| int index = indices [i]; |
| if (index != -1) { |
| OS.PtListUnselectPos (handle, index + 1); |
| } |
| } |
| } |
| |
| /** |
| * Deselects all selected 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 void deselectAll () { |
| checkWidget(); |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| int count = args [1]; |
| for (int i=0; i<count; i++) { |
| OS.PtListUnselectPos (handle, i + 1); |
| } |
| } |
| |
| /** |
| * Returns the zero-relative index of the item which currently |
| * has the focus in the receiver, or -1 if no item has focus. |
| * |
| * @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 getFocusIndex () { |
| return getSelectionIndex (); |
| } |
| |
| /** |
| * 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 String getItem (int index) { |
| checkWidget(); |
| int [] args = new int [] { |
| OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0, |
| OS.Pt_ARG_ITEMS, 0, 0, |
| }; |
| OS.PtGetResources (handle, args.length / 3, args); |
| if (!(0 <= index && index < args [1])) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| int [] items = new int [1]; |
| OS.memmove (items, args [4] + (index * 4), 4); |
| int length = OS.strlen (items [0]); |
| byte [] buffer = new byte [length]; |
| OS.memmove (buffer, items [0], length); |
| char [] unicode = Converter.mbcsToWcs (null, buffer); |
| return new String (unicode); |
| } |
| |
| /** |
| * 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(); |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| return args [1]; |
| } |
| |
| /** |
| * Returns the height of the area which would be used to |
| * display <em>one</em> of the items in the list. |
| * |
| * @return the height of one 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 getItemHeight () { |
| checkWidget(); |
| int [] args = new int [] { |
| OS.Pt_ARG_LIST_TOTAL_HEIGHT, 0, 0, |
| OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0, |
| OS.Pt_ARG_LIST_FONT, 0, 0, |
| }; |
| OS.PtGetResources (handle, args.length / 3, args); |
| if (args [4] == 0) { |
| int ptr = OS.malloc(1); |
| OS.memset(ptr, 0, 1); |
| PhRect_t rect = new PhRect_t (); |
| OS.PfExtentText(rect, null, args [7], ptr, 1); |
| OS.free(ptr); |
| int inset = 4; |
| return inset + (rect.lr_y - rect.ul_y + 1); |
| } |
| return args [1] / args [4]; |
| } |
| |
| /** |
| * Returns a (possibly empty) array of <code>String</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's list |
| * |
| * @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 [] getItems () { |
| checkWidget(); |
| int [] args = new int [] { |
| OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0, |
| OS.Pt_ARG_ITEMS, 0, 0, |
| }; |
| OS.PtGetResources (handle, args.length / 3, args); |
| int [] items = new int [args [1]]; |
| OS.memmove (items, args [4], args [1] * 4); |
| String [] result = new String [args [1]]; |
| for (int i=0; i<args [1]; i++) { |
| int length = OS.strlen (items [i]); |
| byte [] buffer = new byte [length]; |
| OS.memmove (buffer, items [i], length); |
| char [] unicode = Converter.mbcsToWcs (null, buffer); |
| result [i] = new String (unicode); |
| } |
| return result; |
| |
| } |
| |
| /** |
| * Returns an array of <code>String</code>s that are currently |
| * selected in the receiver. The order of the items is unspecified. |
| * 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 String [] getSelection () { |
| checkWidget(); |
| int [] indices = getSelectionIndices (); |
| String [] result = new String [indices.length]; |
| for (int i=0; i<indices.length; i++) { |
| result [i] = getItem (indices [i]); |
| } |
| return result; |
| } |
| |
| /** |
| * Returns the number of selected items contained in the receiver. |
| * |
| * @return the number of selected 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 getSelectionCount () { |
| checkWidget(); |
| int [] args = new int [] {OS.Pt_ARG_LIST_SEL_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| return args [1]; |
| } |
| |
| /** |
| * 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 or -1 |
| * |
| * @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 [] args = new int [] { |
| OS.Pt_ARG_LIST_SEL_COUNT, 0, 0, |
| OS.Pt_ARG_SELECTION_INDEXES, 0, 0, |
| }; |
| OS.PtGetResources (handle, args.length / 3, args); |
| if (args [1] == 0) return -1; |
| short [] buffer = new short [1]; |
| OS.memmove (buffer, args [4], 2); |
| return buffer [0] - 1; |
| } |
| |
| /** |
| * Returns the zero-relative indices of the items which are currently |
| * selected in the receiver. The order of the indices is unspecified. |
| * The array is empty if 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 the array of indices of the selected 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 [] getSelectionIndices () { |
| checkWidget(); |
| int [] args = new int [] { |
| OS.Pt_ARG_LIST_SEL_COUNT, 0, 0, |
| OS.Pt_ARG_SELECTION_INDEXES, 0, 0, |
| }; |
| OS.PtGetResources (handle, args.length / 3, args); |
| short [] indices = new short [args [1]]; |
| OS.memmove (indices, args [4], args [1] * 2); |
| int [] result = new int [args [1]]; |
| for (int i=0; i<args [1]; i++) { |
| result [i] = indices [i] - 1; |
| } |
| return result; |
| } |
| |
| /** |
| * Returns the zero-relative index of the item which is currently |
| * at the top of the receiver. This index can change when items are |
| * scrolled or new items are added or removed. |
| * |
| * @return the index of the top 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 getTopIndex () { |
| checkWidget(); |
| int [] args = new int [] {OS.Pt_ARG_TOP_ITEM_POS, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| return args [1] - 1; |
| } |
| |
| void hookEvents () { |
| super.hookEvents (); |
| int windowProc = display.windowProc; |
| OS.PtAddCallback (handle, OS.Pt_CB_SELECTION, windowProc, OS.Pt_CB_SELECTION); |
| OS.PtAddCallback (handle, OS.Pt_CB_ACTIVATE, windowProc, OS.Pt_CB_ACTIVATE); |
| } |
| |
| /** |
| * Gets the index of an item. |
| * <p> |
| * The list is searched starting at 0 until an |
| * item is found that is equal to the search item. |
| * If no item is found, -1 is returned. Indexing |
| * is zero based. |
| * |
| * @param string the search item |
| * @return the index of the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string 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 (String string) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| byte [] buffer = Converter.wcsToMbcs (null, string, true); |
| return OS.PtListItemPos (handle, buffer) - 1; |
| } |
| |
| /** |
| * 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. |
| * |
| * @param string the search item |
| * @param start the zero-relative index at which to start the search |
| * @return the index of the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string 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 (String string, int start) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (start == 0) return indexOf(string); |
| int [] args = new int [] { |
| OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0, |
| OS.Pt_ARG_ITEMS, 0, 0, |
| }; |
| OS.PtGetResources (handle, args.length / 3, args); |
| int count = args [1]; |
| if (!(0 <= start && start < count)) return -1; |
| int [] item = new int [1]; |
| for (int index=start; index<count; index++) { |
| OS.memmove (item, args [4] + (index * 4), 4); |
| int length = OS.strlen (item [0]); |
| byte [] buffer = new byte [length]; |
| OS.memmove (buffer, item [0], length); |
| if (string.equals(new String (Converter.mbcsToWcs (null, buffer)))) return index; |
| } |
| return -1; |
| } |
| |
| /** |
| * Returns <code>true</code> if the item is selected, |
| * and <code>false</code> otherwise. Indices out of |
| * range are ignored. |
| * |
| * @param index the index of the item |
| * @return the selection state of the item at the index |
| * |
| * @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 isSelected (int index) { |
| checkWidget(); |
| int [] args = new int [] { |
| OS.Pt_ARG_LIST_SEL_COUNT, 0, 0, |
| OS.Pt_ARG_SELECTION_INDEXES, 0, 0, |
| }; |
| OS.PtGetResources (handle, args.length / 3, args); |
| short [] buffer = new short [1]; |
| for (int i=0; i<args [1]; i++) { |
| OS.memmove (buffer, args [4] + (i * 2), 2); |
| if (buffer [0] == index + 1) return true; |
| } |
| return false; |
| } |
| |
| int Pt_CB_ACTIVATE (int widget, int info) { |
| if (info == 0) return OS.Pt_END; |
| PtCallbackInfo_t cbinfo = new PtCallbackInfo_t (); |
| OS.memmove (cbinfo, info, PtCallbackInfo_t.sizeof); |
| if (cbinfo.cbdata == 0) return OS.Pt_END; |
| int[] click_count = new int [1]; |
| OS.memmove(click_count, cbinfo.cbdata, 4); |
| if (click_count [0] > 1) postEvent (SWT.DefaultSelection); |
| return OS.Pt_CONTINUE; |
| } |
| |
| int Pt_CB_SELECTION (int widget, int info) { |
| postEvent (SWT.Selection); |
| return OS.Pt_CONTINUE; |
| } |
| |
| /** |
| * Removes the item from the receiver at the given |
| * zero-relative index. |
| * |
| * @param index the index for the item |
| * |
| * @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 void remove (int index) { |
| checkWidget(); |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| if (!(0 <= index && index < args [1])) error (SWT.ERROR_INVALID_RANGE); |
| int result = OS.PtListDeleteItemPos (handle, 1, index + 1); |
| if (result != 0) error (SWT.ERROR_ITEM_NOT_REMOVED); |
| } |
| |
| /** |
| * 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. |
| * |
| * @param string the item to remove |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the string is not found in the list</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 remove (String string) { |
| checkWidget(); |
| int index = indexOf (string, 0); |
| if (index == -1) error (SWT.ERROR_INVALID_ARGUMENT); |
| remove (index); |
| } |
| |
| /** |
| * Removes the items from the receiver at the given |
| * zero-relative indices. |
| * |
| * @param indices the array of indices of the items |
| * |
| * @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> |
| * <li>ERROR_NULL_ARGUMENT - if the indices 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 remove (int [] indices) { |
| checkWidget(); |
| if (indices == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (indices.length == 0) return; |
| int [] newIndices = new int [indices.length]; |
| System.arraycopy (indices, 0, newIndices, 0, indices.length); |
| sort (newIndices); |
| int start = newIndices [newIndices.length - 1], end = newIndices [0]; |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| int count = args [1]; |
| if (!(0 <= start && start <= end && end < count)) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| int last = -1; |
| for (int i=0; i<newIndices.length; i++ ) { |
| int index = newIndices [i]; |
| if (last != index) { |
| int result = OS.PtListDeleteItemPos (handle, 1, index + 1); |
| if (result != 0) error (SWT.ERROR_ITEM_NOT_REMOVED); |
| last = index; |
| } |
| } |
| } |
| |
| /** |
| * Removes the items from the receiver which are |
| * between the given zero-relative start and end |
| * indices (inclusive). |
| * |
| * @param start the start of the range |
| * @param end the end of the range |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE - if either the start or end are 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 void remove (int start, int end) { |
| checkWidget(); |
| if (start > end) return; |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| if (!(0 <= start && start <= end && end < args [1])) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| int count = end - start + 1; |
| int result = OS.PtListDeleteItemPos (handle, count, start + 1); |
| if (result != 0) error (SWT.ERROR_ITEM_NOT_REMOVED); |
| } |
| |
| /** |
| * Removes all of the items from the receiver. |
| * <p> |
| * @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 removeAll () { |
| checkWidget(); |
| OS.PtListDeleteAllItems (handle); |
| } |
| |
| /** |
| * 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); |
| } |
| |
| /** |
| * Selects the items in the range specified by the given zero-relative |
| * indices in the receiver. The range of indices is inclusive. |
| * The current selection is not cleared before the new items are selected. |
| * <p> |
| * If an item in the given range is not selected, it is selected. |
| * If an item in the given range was already selected, it remains selected. |
| * Indices that are out of range are ignored and no items will be selected |
| * if start is greater than end. |
| * If the receiver is single-select and there is more than one item in the |
| * given range, then all indices are ignored. |
| * |
| * @param start the start of the range |
| * @param end the end of the range |
| * |
| * @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 List#setSelection(int,int) |
| */ |
| public void select (int start, int end) { |
| checkWidget (); |
| if (end < 0 || start > end || ((style & SWT.SINGLE) != 0 && start != end)) return; |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| int count = args [1]; |
| if (count == 0 || start >= count) return; |
| start = Math.max (0, start); |
| end = Math.min (end, count - 1); |
| if ((style & SWT.SINGLE) != 0) { |
| select (start); |
| return; |
| } |
| int gotoIndex = -1; |
| for (int index=end; index>=start; index--) { |
| gotoIndex = index; |
| OS.PtListSelectPos (handle, index + 1); |
| } |
| if (gotoIndex != -1) OS.PtListGotoPos (handle, gotoIndex + 1); |
| } |
| |
| /** |
| * Selects the items at the given zero-relative indices in the receiver. |
| * The current selection is not cleared before the new items are selected. |
| * <p> |
| * If the item at a given index is not selected, it is selected. |
| * If the item at a given index was already selected, it remains selected. |
| * Indices that are out of range and duplicate indices are ignored. |
| * If the receiver is single-select and multiple indices are specified, |
| * then all indices are ignored. |
| * |
| * @param indices the array of indices for the items to select |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the array of indices 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 List#setSelection(int[]) |
| */ |
| public void select (int [] indices) { |
| checkWidget (); |
| if (indices == null) error (SWT.ERROR_NULL_ARGUMENT); |
| int length = indices.length; |
| if (length == 0 || ((style & SWT.SINGLE) != 0 && length > 1)) return; |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| int count = args [1]; |
| int gotoIndex = -1; |
| for (int i=0; i<length; i++) { |
| int index = indices [i]; |
| if (0 <= index && index < count) { |
| gotoIndex = index; |
| OS.PtListSelectPos (handle, index + 1); |
| } |
| } |
| if (gotoIndex != -1) OS.PtListGotoPos (handle, gotoIndex + 1); |
| } |
| |
| /** |
| * 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. |
| * |
| * @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 select (int index) { |
| checkWidget(); |
| if (index < 0) return; |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| if (index < args [1]) { |
| OS.PtListSelectPos (handle, index + 1); |
| OS.PtListGotoPos (handle, index + 1); |
| } |
| } |
| |
| /** |
| * Selects all of the items in the receiver. |
| * <p> |
| * If the receiver is single-select, do nothing. |
| * |
| * @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 selectAll () { |
| checkWidget(); |
| if ((style & SWT.SINGLE) != 0) return; |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| int count = args [1]; |
| for (int i=0; i<count; i++) { |
| OS.PtListSelectPos (handle, i + 1); |
| } |
| } |
| |
| /** |
| * Sets the text of the item in the receiver's list at the given |
| * zero-relative index to the string argument. |
| * |
| * @param index the index for the item |
| * @param string the new text for the item |
| * |
| * @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> |
| * <li>ERROR_NULL_ARGUMENT - if the string 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 setItem (int index, String string) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| if (!(0 <= index && index < args [1])) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| byte [] buffer = Converter.wcsToMbcs (null, string, true); |
| int ptr = OS.malloc (buffer.length); |
| OS.memmove (ptr, buffer, buffer.length); |
| OS.PtListReplaceItemPos (handle, new int [] {ptr}, 1, index + 1); |
| OS.free (ptr); |
| } |
| |
| /** |
| * Sets the receiver's items to be the given array of items. |
| * |
| * @param items the array of items |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the items array is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if an item in 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 setItems (String [] items) { |
| checkWidget(); |
| if (items == null) error (SWT.ERROR_NULL_ARGUMENT); |
| for (int i=0; i<items.length; i++) { |
| if (items [i] == null) error (SWT.ERROR_INVALID_ARGUMENT); |
| } |
| OS.PtListDeleteAllItems (handle); |
| int[] itemsPtr = new int [items.length]; |
| for (int i=0; i<itemsPtr.length; i++) { |
| byte [] buffer = Converter.wcsToMbcs (null, items [i], true); |
| int ptr = OS.malloc (buffer.length); |
| OS.memmove (ptr, buffer, buffer.length); |
| itemsPtr [i] = ptr; |
| } |
| OS.PtListAddItems (handle, itemsPtr, itemsPtr.length, 0); |
| for (int i=0; i<itemsPtr.length; i++) { |
| OS.free (itemsPtr [i]); |
| } |
| } |
| |
| /** |
| * Selects the items in the range specified by the given zero-relative |
| * indices in the receiver. The range of indices is inclusive. |
| * The current selection is cleared before the new items are selected. |
| * <p> |
| * Indices that are out of range are ignored and no items will be selected |
| * if start is greater than end. |
| * If the receiver is single-select and there is more than one item in the |
| * given range, then all indices are ignored. |
| * |
| * @param start the start index of the items to select |
| * @param end the end index of the items 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> |
| * |
| * @see List#deselectAll() |
| * @see List#select(int,int) |
| */ |
| public void setSelection (int start, int end) { |
| checkWidget (); |
| if (end < 0 || start > end || ((style & SWT.SINGLE) != 0 && start != end)) { |
| deselectAll (); |
| return; |
| } |
| int [] args = new int [] {OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0}; |
| OS.PtGetResources (handle, args.length / 3, args); |
| int count = args [1]; |
| if (count == 0 || start >= count) { |
| deselectAll (); |
| return; |
| } |
| start = Math.max (0, start); |
| end = Math.min (end, count - 1); |
| if ((style & SWT.MULTI) != 0) deselectAll (); |
| select (start, end); |
| } |
| |
| /** |
| * 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 item is 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> |
| * @see List#deselectAll() |
| * @see List#select(int) |
| */ |
| public void setSelection (int index) { |
| if ((style & SWT.MULTI) != 0) deselectAll (); |
| select (index); |
| } |
| |
| /** |
| * Selects the items at the given zero-relative indices in the receiver. |
| * The current selection is cleared before the new items are selected. |
| * <p> |
| * Indices that are out of range and duplicate indices are ignored. |
| * If the receiver is single-select and multiple indices are specified, |
| * then all indices are ignored. |
| * |
| * @param indices the indices of the items to select |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the array of indices 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 List#deselectAll() |
| * @see List#select(int[]) |
| */ |
| public void setSelection(int[] indices) { |
| checkWidget (); |
| if (indices == null) error (SWT.ERROR_NULL_ARGUMENT); |
| deselectAll (); |
| int length = indices.length; |
| if (length == 0 || ((style & SWT.SINGLE) != 0 && length > 1)) return; |
| select (indices); |
| } |
| |
| /** |
| * Sets the receiver's selection to be the given array of items. |
| * The current selection is cleared before the new items are selected. |
| * <p> |
| * Items that are not in the receiver are ignored. |
| * If the receiver is single-select and multiple items are specified, |
| * then all items are ignored. |
| * |
| * @param items the array of items |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the array of items 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 List#deselectAll() |
| * @see List#select(int[]) |
| * @see List#setSelection(int[]) |
| */ |
| public void setSelection (String [] items) { |
| checkWidget (); |
| if (items == null) error (SWT.ERROR_NULL_ARGUMENT); |
| int length = items.length; |
| if (length == 0 || ((style & SWT.SINGLE) != 0 && length > 1)) { |
| deselectAll (); |
| return; |
| } |
| if ((style & SWT.MULTI) != 0) deselectAll (); |
| for (int i=length-1; i>=0; --i) { |
| int index = 0; |
| String string = items [i]; |
| if (string != null) { |
| while ((index = indexOf (string, index)) != -1) { |
| select (index); |
| if ((style & SWT.SINGLE) != 0) return; |
| index++; |
| } |
| } |
| } |
| if ((style & SWT.SINGLE) != 0) deselectAll (); |
| } |
| |
| /** |
| * Sets the zero-relative index of the item which is currently |
| * at the top of the receiver. This index can change when items |
| * are scrolled or new items are added and removed. |
| * |
| * @param index the index of the top 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 void setTopIndex (int index) { |
| checkWidget(); |
| OS.PtSetResource (handle, OS.Pt_ARG_TOP_ITEM_POS, index + 1, 0); |
| } |
| |
| /** |
| * Shows the selection. If the selection is already showing in the receiver, |
| * this method simply returns. Otherwise, the items are scrolled until |
| * the selection is visible. |
| * |
| * @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 showSelection () { |
| checkWidget(); |
| int [] args = new int [] { |
| OS.Pt_ARG_LIST_SEL_COUNT, 0, 0, |
| OS.Pt_ARG_SELECTION_INDEXES, 0, 0, |
| OS.Pt_ARG_TOP_ITEM_POS, 0, 0, |
| OS.Pt_ARG_VISIBLE_COUNT, 0, 0, |
| OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0 |
| }; |
| OS.PtGetResources (handle, args.length / 3, args); |
| if (args [1] == 0) return; |
| short [] buffer = new short [1]; |
| OS.memmove (buffer, args [4], 2); |
| int index = buffer [0] - 1; |
| int topIndex = args [7] - 1, visibleCount = args [10], count = args [13]; |
| int bottomIndex = Math.min (topIndex + visibleCount - 1, count); |
| if ((topIndex <= index) && (index <= bottomIndex)) return; |
| int lastIndex = Math.max (1, count - visibleCount + 1); |
| int newTop = Math.min (Math.max (index - (visibleCount / 2), 1), lastIndex); |
| OS.PtSetResource (handle, OS.Pt_ARG_TOP_ITEM_POS, newTop, 0); |
| } |
| |
| int widgetClass () { |
| return OS.PtList (); |
| } |
| |
| } |