| /******************************************************************************* |
| * Copyright (c) 2000, 2008 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.motif.*; |
| 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> |
| */ |
| 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) { |
| /* |
| * Feature in Motif. It is not possible to create |
| * scrolled list that will never show the vertical |
| * scroll bar. Therefore, not matter what style |
| * bits are specified, set the V_SCROLL bits to |
| * match the widget Motif creates. |
| */ |
| super (parent, checkStyle (style | SWT.V_SCROLL)); |
| } |
| /** |
| * 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 (getCodePage (), string, true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| if (xmString == 0) error (SWT.ERROR_ITEM_NOT_ADDED); |
| OS.XmListAddItemUnselected (handle, xmString, 0); |
| OS.XmStringFree (xmString); |
| } |
| /** |
| * 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); |
| /* |
| * Feature in Motif. When an index is out of range, |
| * the list widget adds the item at the end. This |
| * behavior is not wrong but it is unwanted. The |
| * fix is to check the range before adding the item. |
| */ |
| int [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (!(0 <= index && index <= argList [1])) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| byte [] buffer = Converter.wcsToMbcs (getCodePage (), string, true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| if (xmString == 0) error (SWT.ERROR_ITEM_NOT_ADDED); |
| OS.XmListAddItemUnselected (handle, xmString, index + 1); |
| OS.XmStringFree (xmString); |
| } |
| /** |
| * 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); |
| } |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.SINGLE, SWT.MULTI, 0, 0, 0, 0); |
| } |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget(); |
| XtWidgetGeometry result = new XtWidgetGeometry (); |
| result.request_mode = OS.CWWidth; |
| OS.XtQueryGeometry (handle, null, result); |
| int width = result.width, height = 0; |
| if (wHint != SWT.DEFAULT) width = wHint; |
| if (hHint != SWT.DEFAULT) height = hHint; |
| if (hHint == SWT.DEFAULT || wHint == SWT.DEFAULT) { |
| int [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int count = argList [1]; |
| if (hHint == SWT.DEFAULT) { |
| if (count == 0) { |
| height = DEFAULT_HEIGHT; |
| } else { |
| height = getItemHeight () * count; |
| } |
| } |
| if (wHint == SWT.DEFAULT && count == 0) { |
| width = DEFAULT_WIDTH; |
| } |
| } |
| Rectangle rect = computeTrim (0, 0, width, height); |
| return new Point (rect.width, rect.height); |
| } |
| public Rectangle computeTrim (int x, int y, int width, int height) { |
| checkWidget(); |
| int border = getBorderWidth (); |
| int trimX = x - border; |
| int trimY = y - border; |
| int trimWidth = width + (border * 2); |
| int trimHeight = height + (border * 2); |
| if (horizontalBar != null) { |
| int [] argList = {OS.XmNheight, 0}; |
| OS.XtGetValues (horizontalBar.handle, argList, argList.length / 2); |
| /* |
| * Motif adds four pixels between the bottom of the |
| * list and the horizontal scroll bar. Add those now. |
| */ |
| trimHeight += argList [1] + 4; |
| trimY -= display.scrolledInsetY; |
| if (verticalBar != null) { |
| trimX -= display.scrolledInsetX; |
| } |
| } |
| if (verticalBar != null) { |
| int [] argList = {OS.XmNwidth, 0}; |
| OS.XtGetValues (verticalBar.handle, argList, argList.length / 2); |
| trimWidth += argList [1]; |
| trimX -= display.scrolledInsetX; |
| if (horizontalBar != null) { |
| trimY -= display.scrolledInsetY; |
| } |
| } |
| int [] argList = { |
| OS.XmNhighlightThickness, 0, /* 1 */ |
| OS.XmNshadowThickness, 0, /* 3 */ |
| OS.XmNlistMarginWidth, 0, /* 5 */ |
| OS.XmNlistMarginHeight, 0 /* 7 */ |
| }; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int thickness = argList [1] + (argList [3] * 2); |
| trimWidth += thickness + argList [5] + 1; |
| trimHeight += thickness + argList [7] + 1; |
| trimX -= argList [1] + argList [3] + argList [5]; |
| trimY -= argList [1] + argList [3] + argList [7]; |
| return new Rectangle (trimX, trimY, trimWidth, trimHeight); |
| } |
| void createHandle (int index) { |
| /* |
| * Feature in Motif. When items are added or removed |
| * from a list, it may request and be granted, a new |
| * preferred size. This behavior is unwanted. The fix |
| * is to create a parent for the list that will disallow |
| * geometry requests. |
| */ |
| int parentHandle = parent.handle; |
| int [] argList1 = {OS.XmNancestorSensitive, 1}; |
| formHandle = OS.XmCreateForm (parentHandle, null, argList1, argList1.length / 2); |
| if (formHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| int selectionPolicy = OS.XmBROWSE_SELECT, listSizePolicy = OS.XmCONSTANT; |
| if ((style & SWT.MULTI) != 0) { |
| selectionPolicy = OS.XmEXTENDED_SELECT; |
| if ((style & SWT.SIMPLE) != 0) selectionPolicy = OS.XmMULTIPLE_SELECT; |
| } |
| if ((style & SWT.H_SCROLL) == 0) listSizePolicy = OS.XmVARIABLE; |
| int [] argList2 = { |
| OS.XmNlistSizePolicy, listSizePolicy, |
| OS.XmNselectionPolicy, selectionPolicy, |
| OS.XmNtopAttachment, OS.XmATTACH_FORM, |
| OS.XmNbottomAttachment, OS.XmATTACH_FORM, |
| OS.XmNleftAttachment, OS.XmATTACH_FORM, |
| OS.XmNrightAttachment, OS.XmATTACH_FORM, |
| OS.XmNresizable, 0, |
| // OS.XmNmatchBehavior, OS.XmNONE, |
| }; |
| if ((style & (SWT.H_SCROLL | SWT.V_SCROLL)) == 0) { |
| handle = OS.XmCreateList (formHandle, null, argList2, argList2.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| } else { |
| handle = OS.XmCreateScrolledList (formHandle, new byte [1], argList2, argList2.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| scrolledHandle = OS.XtParent (handle); |
| } |
| if ((style & SWT.BORDER) == 0) { |
| int [] argList3 = new int [] {OS.XmNshadowThickness, 0}; |
| OS.XtSetValues (handle, argList3, argList3.length / 2); |
| } |
| } |
| ScrollBar createScrollBar (int type) { |
| return createStandardBar (type); |
| } |
| int defaultBackground () { |
| return display.listBackground; |
| } |
| Font defaultFont () { |
| return display.listFont; |
| } |
| int defaultForeground () { |
| return display.listForeground; |
| } |
| /** |
| * 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(); |
| /* |
| * Note: We rely on the fact that XmListDeselectPos () |
| * fails silently when the indices are out of range. |
| */ |
| if (index != -1) OS.XmListDeselectPos (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; |
| /* |
| * Note: We rely on the fact that XmListDeselectPos () |
| * fails silently when the indices are out of range. |
| */ |
| for (int i=start; i<=end; i++) { |
| int index = i + 1; |
| if (index != 0) OS.XmListDeselectPos (handle, index); |
| } |
| } |
| /** |
| * 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); |
| /* |
| * Note: We rely on the fact that XmListDeselectPos () |
| * fails silently when the indices are out of range. |
| */ |
| for (int i=0; i<indices.length; i++) { |
| int index = indices [i] + 1; |
| if (index != 0) OS.XmListDeselectPos (handle, index); |
| } |
| } |
| /** |
| * 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(); |
| OS.XmListDeselectAllItems (handle); |
| } |
| /** |
| * 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 () { |
| checkWidget(); |
| return OS.XmListGetKbdItemPos (handle) - 1; |
| } |
| /** |
| * 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 [] argList = {OS.XmNitemCount, 0, OS.XmNitems, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (!(0 <= index && index < argList [1])) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| if (argList [3] == 0) error (SWT.ERROR_CANNOT_GET_ITEM); |
| int ptr = argList [3] + (index * 4); |
| int [] buffer1 = new int [1]; |
| OS.memmove (buffer1, ptr, 4); |
| ptr = buffer1 [0]; |
| int [] table = new int [] {display.tabMapping, display.crMapping}; |
| int address = OS.XmStringUnparse ( |
| ptr, |
| null, |
| OS.XmCHARSET_TEXT, |
| OS.XmCHARSET_TEXT, |
| table, |
| table.length, |
| OS.XmOUTPUT_ALL); |
| if (address == 0) error (SWT.ERROR_CANNOT_GET_ITEM); |
| int length = OS.strlen (address); |
| byte [] buffer = new byte [length]; |
| OS.memmove (buffer, address, length); |
| OS.XtFree (address); |
| return new String (Converter.mbcsToWcs (getCodePage (), buffer)); |
| } |
| /** |
| * 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 [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [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 [] argList = { |
| OS.XmNlistSpacing, 0, |
| OS.XmNhighlightThickness, 0, |
| }; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int spacing = argList [1], highlight = argList [3]; |
| |
| /* Result is from empirical analysis on Linux and AIX */ |
| return getFontHeight (font.handle) + spacing + highlight + 1; |
| } |
| /** |
| * 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 [] argList = {OS.XmNitems, 0, OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int items = argList [1], itemCount = argList [3]; |
| int [] buffer1 = new int [1]; |
| String [] result = new String [itemCount]; |
| String codePage = getCodePage (); |
| for (int i=0; i<itemCount; i++) { |
| OS.memmove (buffer1, items, 4); |
| int ptr = buffer1 [0]; |
| int [] table = new int [] {display.tabMapping, display.crMapping}; |
| int address = OS.XmStringUnparse ( |
| ptr, |
| null, |
| OS.XmCHARSET_TEXT, |
| OS.XmCHARSET_TEXT, |
| table, |
| table.length, |
| OS.XmOUTPUT_ALL); |
| if (address == 0) error (SWT.ERROR_CANNOT_GET_ITEM); |
| int length = OS.strlen (address); |
| byte [] buffer = new byte [length]; |
| OS.memmove (buffer, address, length); |
| OS.XtFree (address); |
| result[i] = new String (Converter.mbcsToWcs (codePage, buffer)); |
| items += 4; |
| } |
| 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 [] argList = {OS.XmNselectedItems, 0, OS.XmNselectedItemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int items = argList [1], itemCount = argList [3]; |
| int [] buffer1 = new int [1]; |
| String [] result = new String [itemCount]; |
| String codePage = getCodePage (); |
| for (int i=0; i<itemCount; i++) { |
| OS.memmove (buffer1, items, 4); |
| int ptr = buffer1 [0]; |
| int[] table = new int[] {display.tabMapping, display.crMapping}; |
| int address = OS.XmStringUnparse ( |
| ptr, |
| null, |
| OS.XmCHARSET_TEXT, |
| OS.XmCHARSET_TEXT, |
| table, |
| table.length, |
| OS.XmOUTPUT_ALL); |
| if (address == 0) error (SWT.ERROR_CANNOT_GET_ITEM); |
| int length = OS.strlen (address); |
| byte [] buffer = new byte [length]; |
| OS.memmove (buffer, address, length); |
| OS.XtFree (address); |
| result[i] = new String (Converter.mbcsToWcs (codePage, buffer)); |
| items += 4; |
| } |
| 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 [] argList = {OS.XmNselectedItemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [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 index = OS.XmListGetKbdItemPos (handle); |
| if (OS.XmListPosSelected (handle, index)) return index - 1; |
| int [] count = new int [1], positions = new int [1]; |
| if (!OS.XmListGetSelectedPos (handle, positions, count)) return -1; |
| if (count [0] == 0) return -1; |
| int address = positions [0]; |
| int [] indices = new int [1]; |
| OS.memmove (indices, address, 4); |
| OS.XtFree (address); |
| return indices [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 [] count = new int [1], positions = new int [1]; |
| OS.XmListGetSelectedPos (handle, positions, count); |
| int [] result = new int [count [0]]; |
| OS.memmove (result, positions [0], count [0] * 4); |
| if (positions [0] != 0) OS.XtFree (positions [0]); |
| for (int i=0; i<result.length; i++) --result [i]; |
| 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 [] argList = {OS.XmNtopItemPosition, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1] - 1; |
| } |
| void hookEvents () { |
| super.hookEvents (); |
| int windowProc = display.windowProc; |
| OS.XtAddCallback (handle, OS.XmNbrowseSelectionCallback, windowProc, BROWSE_SELECTION_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNextendedSelectionCallback, windowProc, EXTENDED_SELECTION_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNmultipleSelectionCallback, windowProc, MULTIPLE_SELECTION_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNdefaultActionCallback, windowProc, DEFAULT_ACTION_CALLBACK); |
| } |
| /** |
| * 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 (getCodePage (), string, true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| if (xmString == 0) return -1; |
| int index = OS.XmListItemPos (handle, xmString); |
| OS.XmStringFree (xmString); |
| return index - 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); |
| int [] argList = {OS.XmNitems, 0, OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int items = argList [1], itemCount = argList [3]; |
| if (!((0 <= start) && (start < itemCount))) return -1; |
| byte [] buffer1 = Converter.wcsToMbcs (getCodePage (), string, true); |
| int xmString = OS.XmStringCreateLocalized (buffer1); |
| if (xmString == 0) return -1; |
| int index = start; |
| items += start * 4; |
| int [] buffer2 = new int [1]; |
| while (index < itemCount) { |
| OS.memmove (buffer2, items, 4); |
| if (OS.XmStringCompare (buffer2 [0], xmString)) break; |
| items += 4; index++; |
| } |
| OS.XmStringFree (xmString); |
| if (index == itemCount) return -1; |
| return index; |
| } |
| /** |
| * 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(); |
| if (index == -1) return false; |
| return OS.XmListPosSelected (handle, index + 1); |
| } |
| void overrideTranslations () { |
| OS.XtOverrideTranslations (handle, display.tabTranslations); |
| } |
| /** |
| * 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(); |
| if (index == -1) error (SWT.ERROR_INVALID_RANGE); |
| /* |
| * Feature in Motif. An index out of range handled |
| * correctly by the list widget but causes an unwanted |
| * Xm Warning. The fix is to check the range before |
| * deleting an item. |
| */ |
| int [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (!(0 <= index && index < argList [1])) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| OS.XmListDeletePos (handle, index + 1); |
| } |
| /** |
| * 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 [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (!(0 <= start && start <= end && end < argList [1])) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| int count = end - start + 1; |
| OS.XmListDeleteItemsPos (handle, count, start + 1); |
| } |
| /** |
| * 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(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| byte [] buffer = Converter.wcsToMbcs (getCodePage (), string, true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| if (xmString == 0) error (SWT.ERROR_ITEM_NOT_REMOVED); |
| int index = OS.XmListItemPos (handle, xmString); |
| OS.XmStringFree (xmString); |
| if (index == 0) error (SWT.ERROR_INVALID_ARGUMENT); |
| OS.XmListDeletePos (handle, 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 [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int [] newIndices = new int [indices.length]; |
| for (int i=0; i<indices.length; i++) { |
| if (!(0 <= indices [i] && indices [i] < argList [1])) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| newIndices [i] = indices [i] + 1; |
| } |
| OS.XmListDeletePositions (handle, newIndices, newIndices.length); |
| } |
| /** |
| * 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.XmListDeselectAllItems (handle); |
| OS.XmListDeleteAllItems (handle); |
| /* |
| * Bug in AIX. When all list items are deleted |
| * from a scrolled list that is currently showing a |
| * horizontal scroll bar, the horizontal scroll bar |
| * is hidden, but the list does not grow to take up |
| * the space once occupied by the bar. The fix is |
| * of force a resize of the list. |
| */ |
| if ((style & SWT.H_SCROLL) != 0) OS.XtResizeWindow (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 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 == -1) return; |
| if (OS.XmListPosSelected (handle, index + 1)) return; |
| /* |
| * Feature in MOTIF. The X/MOTIF 1.2 spec says that XmListSelectPos () |
| * in a XmEXTENDED_SELECT list widget will add the index to the selected |
| * indices. The observed behavior does not match the spec. The fix is |
| * to temporarily switch the XmNselectionPolicy to XmMULTIPLE_SELECT |
| * and then switch it back because XmListSelectPost () works as specified |
| * for XmMULTIPLE_SELECT list widgets. |
| */ |
| int [] argList = {OS.XmNselectionPolicy, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int oldPolicy = argList [1]; |
| if (oldPolicy == OS.XmEXTENDED_SELECT) { |
| argList [1] = OS.XmMULTIPLE_SELECT; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| /* |
| * Note: We rely on the fact that XmListSelectPos () |
| * fails silently when the indices are out of range. |
| */ |
| OS.XmListSelectPos (handle, index + 1, false); |
| if (oldPolicy == OS.XmEXTENDED_SELECT) { |
| argList [1] = OS.XmEXTENDED_SELECT; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| } |
| /** |
| * 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 [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int count = argList[1]; |
| if (count == 0 || start >= count) return; |
| start = Math.max (0, start); |
| end = Math.min (end, count - 1); |
| if ((style & SWT.SINGLE) != 0) { |
| OS.XmListSelectPos (handle, start + 1, false); |
| return; |
| } |
| /* |
| * Feature in MOTIF. The X/MOTIF 1.2 spec says that XmListSelectPos () |
| * in a XmEXTENDED_SELECT list widget will add the index to the selected |
| * indices. The observed behavior does not match the spec. The fix is |
| * to temporarily switch the XmNselectionPolicy to XmMULTIPLE_SELECT |
| * and then switch it back because XmListSelectPos () works as specified |
| * for XmMULTIPLE_SELECT list widgets. |
| */ |
| argList = new int[] {OS.XmNselectionPolicy, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int oldPolicy = argList [1]; |
| if (oldPolicy == OS.XmEXTENDED_SELECT) { |
| argList [1] = OS.XmMULTIPLE_SELECT; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| /* |
| * Note: XmListSelectPos () fails silently when the indices are out of range. |
| */ |
| for (int i=start; i<=end; i++) { |
| int index = i + 1; |
| if (!OS.XmListPosSelected (handle, index)) { |
| OS.XmListSelectPos (handle, index, false); |
| } |
| } |
| if (oldPolicy == OS.XmEXTENDED_SELECT) { |
| argList [1] = OS.XmEXTENDED_SELECT; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| } |
| /** |
| * 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; |
| if ((style & SWT.SINGLE) != 0) { |
| int [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int count = argList [1]; |
| int index = indices [0]; |
| if (0 <= index && index < count) { |
| select (index); |
| } |
| return; |
| } |
| /* |
| * Feature in MOTIF. The X/MOTIF 1.2 spec says that XmListSelectPos () |
| * in a XmEXTENDED_SELECT list widget will add the index to the selected |
| * indices. The observed behavior does not match the spec. The fix is |
| * to temporarily switch the XmNselectionPolicy to XmMULTIPLE_SELECT |
| * and then switch it back because XmListSelectPos () works as specified |
| * for XmMULTIPLE_SELECT list widgets. |
| */ |
| int [] argList = {OS.XmNselectionPolicy, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int oldPolicy = argList [1]; |
| if (oldPolicy == OS.XmEXTENDED_SELECT) { |
| argList [1] = OS.XmMULTIPLE_SELECT; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| /* |
| * Note: We rely on the fact that XmListSelectPos () |
| * fails silently when the indices are out of range. |
| */ |
| for (int i=0; i<length; i++) { |
| int index = indices [i] + 1; |
| if ((index != 0) && !OS.XmListPosSelected (handle, index)) { |
| OS.XmListSelectPos (handle, index, false); |
| } |
| } |
| if (oldPolicy == OS.XmEXTENDED_SELECT) { |
| argList [1] = OS.XmEXTENDED_SELECT; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| } |
| void select (String [] items) { |
| checkWidget(); |
| int [] table = new int [items.length]; |
| String codePage = getCodePage (); |
| for (int i=0; i<items.length; i++) { |
| String string = items [i]; |
| byte [] buffer = Converter.wcsToMbcs (codePage, string, true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| table [i] = xmString; |
| } |
| int ptr = OS.XtMalloc (items.length * 4); |
| OS.memmove (ptr, table, items.length * 4); |
| int [] argList = {OS.XmNselectedItems, ptr, OS.XmNselectedItemCount, table.length}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| for (int i=0; i<table.length; i++) OS.XmStringFree (table [i]); |
| OS.XtFree (ptr); |
| OS.XmListUpdateSelectedList (handle); |
| } |
| /** |
| * 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; |
| /* |
| * Feature in MOTIF. The X/MOTIF 1.2 spec says that XmListSelectPos () |
| * in a XmEXTENDED_SELECT list widget will add the index to the selected |
| * indices. The observed behavior does not match the spec. The fix is |
| * to temporarily switch the XmNselectionPolicy to XmMULTIPLE_SELECT |
| * and then switch it back because XmListSelectPos () works as specified |
| * for XmMULTIPLE_SELECT list widgets. |
| */ |
| int [] argList = {OS.XmNselectionPolicy, 0, OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int oldPolicy = argList [1]; |
| if (oldPolicy == OS.XmEXTENDED_SELECT) { |
| argList [1] = OS.XmMULTIPLE_SELECT; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| for (int i=0; i<argList[3]; i++) { |
| int index = i + 1; |
| if (!OS.XmListPosSelected (handle, index)) { |
| OS.XmListSelectPos (handle, index, false); |
| } |
| } |
| if (oldPolicy == OS.XmEXTENDED_SELECT) { |
| argList [1] = OS.XmEXTENDED_SELECT; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| } |
| boolean setBounds (int x, int y, int width, int height, boolean move, boolean resize) { |
| boolean changed = super.setBounds (x, y, width, height, move, resize); |
| /* |
| * Bug in AIX. When the receiver has a vertical scroll bar |
| * that is currently not visible and no horizontal scroll bar |
| * and is resized to be smaller in both the width and height |
| * and goes from the state where the width of the longest item |
| * is smaller than the width of the list to the state where the |
| * width of the longest item is longer than the width of the |
| * list, the list hides the vertical scroll bar and leaves a |
| * blank space where it should be. This often happens when a |
| * shell containing a list that matches the above criteria is |
| * maximized and then restored. This is just one of a number |
| * of repeatable cases where the scrolled window hides the |
| * scroll bars but does not resize the list. The fix is to |
| * detect these cases and force the scroll bars to be laid |
| * out properly by growing and then shrinking the scrolled |
| * window. |
| */ |
| |
| /* Grow and shrink the scrolled window by one pixel */ |
| if (changed && scrolledHandle != 0) { |
| int [] argList = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; |
| OS.XtGetValues (scrolledHandle, argList, argList.length / 2); |
| OS.XtResizeWidget (scrolledHandle, argList [1] + 1, argList [3], argList [5]); |
| OS.XtResizeWidget (scrolledHandle, argList [1], argList [3], argList [5]); |
| } |
| return changed; |
| } |
| void setFocusIndex (int index) { |
| int [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int count = argList [1]; |
| if (!(0 <= index && index < count)) return; |
| OS.XmListSetKbdItemPos (handle, index + 1); |
| } |
| public void setFont (Font font) { |
| checkWidget (); |
| |
| /* |
| * Bug in Motif. Setting the font in a list widget that does |
| * not have any items causes a GP on UTF-8 locale. |
| * The fix is to add an item, change the font, then |
| * remove the added item at the end. |
| */ |
| int [] argList1 = {OS.XmNitems, 0, OS.XmNitemCount, 0,}; |
| OS.XtGetValues (handle, argList1, argList1.length / 2); |
| boolean fixString = OS.IsDBLocale && argList1 [3] == 0; |
| if (fixString) { |
| byte [] buffer = Converter.wcsToMbcs (getCodePage (), "string", true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| OS.XmListAddItemUnselected (handle, xmString, -1); |
| OS.XmStringFree (xmString); |
| } |
| super.setFont (font); |
| if (fixString) OS.XtSetValues (handle, argList1, argList1.length / 2); |
| } |
| /** |
| * 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); |
| if (index == -1) error (SWT.ERROR_INVALID_RANGE); |
| int [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (!(0 <= index && index < argList [1])) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| byte [] buffer = Converter.wcsToMbcs (getCodePage (), string, true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| if (xmString == 0) error (SWT.ERROR_ITEM_NOT_ADDED); |
| boolean isSelected = OS.XmListPosSelected (handle, index + 1); |
| OS.XmListReplaceItemsPosUnselected (handle, new int [] {xmString}, 1, index + 1); |
| if (isSelected) OS.XmListSelectPos (handle, index + 1, false); |
| OS.XmStringFree (xmString); |
| } |
| /** |
| * 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); |
| } |
| /* |
| * Bug in AIX. When all list items are replaced |
| * in a scrolled list that is currently showing a |
| * horizontal scroll bar, the horizontal scroll bar |
| * is hidden, but the list does not grow to take up |
| * the space once occupied by the bar. The fix is |
| * of force the horizontal bar to be recomputed by |
| * removing all items and resizing the list. |
| */ |
| OS.XmListSetPos (handle, 0); |
| OS.XmListDeselectAllItems (handle); |
| if ((style & SWT.H_SCROLL) != 0) { |
| OS.XmListDeleteAllItems (handle); |
| } |
| int index = 0; |
| int [] table = new int [items.length]; |
| String codePage = getCodePage (); |
| while (index < items.length) { |
| String string = items [index]; |
| byte [] buffer = Converter.wcsToMbcs (codePage, string, true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| if (xmString == 0) break; |
| table [index++] = xmString; |
| } |
| int ptr = OS.XtMalloc (index * 4); |
| OS.memmove (ptr, table, index * 4); |
| int [] argList = {OS.XmNitems, ptr, OS.XmNitemCount, index}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| for (int i=0; i<index; i++) OS.XmStringFree (table [i]); |
| OS.XtFree (ptr); |
| /* |
| * Bug in Motif. Resize the list to work around |
| * the horizontal scroll bar display bug described |
| * above. |
| */ |
| if ((style & SWT.H_SCROLL) != 0) { |
| OS.XtResizeWindow (handle); |
| } |
| if (index < items.length) error (SWT.ERROR_ITEM_NOT_ADDED); |
| } |
| /** |
| * 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) { |
| checkWidget(); |
| deselectAll (); |
| select (index); |
| showSelection (); |
| if ((style & SWT.MULTI) != 0) { |
| if (0 <= index) setFocusIndex (index); |
| } |
| } |
| /** |
| * 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 [] argList = {OS.XmNitemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int count = argList[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); |
| showSelection (); |
| if ((style & SWT.MULTI) != 0) { |
| setFocusIndex (start); |
| } |
| } |
| /** |
| * 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); |
| showSelection (); |
| if ((style & SWT.MULTI) != 0) { |
| int focusIndex = indices [0]; |
| if (0 <= focusIndex) setFocusIndex (focusIndex); |
| } |
| } |
| /** |
| * 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; |
| } |
| String codePage = getCodePage (); |
| if ((style & SWT.SINGLE) != 0) { |
| String string = items [0]; |
| if (string != null) { |
| byte [] buffer = Converter.wcsToMbcs (codePage, string, true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| if (xmString != 0) { |
| int index = OS.XmListItemPos (handle, xmString); |
| if (index != 0) OS.XmListSelectPos (handle, index, false); |
| OS.XmStringFree (xmString); |
| if (index != 0 && OS.XmListPosSelected (handle, index)) { |
| showSelection (); |
| return; |
| } |
| } |
| } |
| deselectAll (); |
| return; |
| } |
| deselectAll (); |
| int count = 0; |
| int [] table = new int [length]; |
| for (int i=0; i<length; i++) { |
| String string = items [i]; |
| if (string != null) { |
| byte [] buffer = Converter.wcsToMbcs (codePage, string, true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| if (xmString != 0) table [count++] = xmString; |
| } |
| } |
| int ptr = OS.XtMalloc (count * 4); |
| OS.memmove (ptr, table, count * 4); |
| int [] argList = {OS.XmNselectedItems, ptr, OS.XmNselectedItemCount, count}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| boolean focusSet = false; |
| for (int i = 0; i < count; i++) { |
| if (!focusSet) { |
| int index = OS.XmListItemPos (handle, table [i]); |
| if (index > 0) { |
| focusSet = true; |
| setFocusIndex (index - 1); |
| } |
| } |
| OS.XmStringFree (table [i]); |
| } |
| OS.XtFree (ptr); |
| OS.XmListUpdateSelectedList (handle); |
| showSelection (); |
| } |
| /** |
| * 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(); |
| int [] argList = {OS.XmNitemCount, 0, OS.XmNvisibleItemCount, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int newIndex = Math.max (1, Math.min (index + 1, argList [1])); |
| int lastIndex = Math.max (1, argList [1] - argList [3] + 1); |
| if (newIndex > lastIndex) newIndex = lastIndex; |
| OS.XmListSetPos (handle, newIndex); |
| } |
| /** |
| * 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 [] buffer = new int [1], positions = new int [1]; |
| if (!OS.XmListGetSelectedPos (handle, positions, buffer)) return; |
| if (buffer [0] == 0) return; |
| int address = positions [0]; |
| int [] indices = new int [1]; |
| OS.memmove (indices, address, 4); |
| OS.XtFree (address); |
| int index = indices [0]; |
| int [] argList = { |
| OS.XmNtopItemPosition, 0, |
| OS.XmNvisibleItemCount, 0, |
| OS.XmNitemCount, 0, |
| }; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int topIndex = argList [1], visibleCount = argList [3], count = argList [5]; |
| 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.XmListSetPos (handle, newTop); |
| } |
| int topHandle () { |
| /* |
| * Normally, when a composite has both a form handle |
| * and a scrolled handle, the scrolled handle is the |
| * parent of the form handle. In the case of a list, |
| * both handles are present but the form handle is |
| * parent of the scrolled handle and therefore is |
| * the top handle of the list. |
| */ |
| return formHandle; |
| } |
| int XmNbrowseSelectionCallback (int w, int client_data, int call_data) { |
| postEvent (SWT.Selection); |
| return 0; |
| } |
| int XmNdefaultActionCallback (int w, int client_data, int call_data) { |
| postEvent (SWT.DefaultSelection); |
| return 0; |
| } |
| int XmNextendedSelectionCallback (int w, int client_data, int call_data) { |
| postEvent (SWT.Selection); |
| return 0; |
| } |
| int XmNmultipleSelectionCallback (int w, int client_data, int call_data) { |
| postEvent (SWT.Selection); |
| return 0; |
| } |
| } |