| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.internal.win32.*; |
| 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 notificiation |
| * when a string 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> |
| */ |
| |
| public class List extends Scrollable { |
| static final int ListProc; |
| static final TCHAR ListClass = new TCHAR (0, "LISTBOX", true); |
| static { |
| WNDCLASS lpWndClass = new WNDCLASS (); |
| OS.GetClassInfo (0, ListClass, lpWndClass); |
| ListProc = lpWndClass.lpfnWndProc; |
| } |
| |
| /** |
| * 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)); |
| } |
| /** |
| * 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_ITEM_NOT_ADDED - if the operation fails because of an operating system failure</li> |
| * </ul> |
| * |
| * @see #add(String,int) |
| */ |
| public void add (String string) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| TCHAR buffer = new TCHAR (getCodePage (), string, true); |
| int result = OS.SendMessage (handle, OS.LB_ADDSTRING, 0, buffer); |
| if (result == OS.LB_ERR) error (SWT.ERROR_ITEM_NOT_ADDED); |
| if (result == OS.LB_ERRSPACE) error (SWT.ERROR_ITEM_NOT_ADDED); |
| if ((style & SWT.H_SCROLL) != 0) setScrollWidth (buffer, true); |
| } |
| /** |
| * 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_ITEM_NOT_ADDED - if the operation fails because of an operating system failure</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); |
| TCHAR buffer = new TCHAR (getCodePage (), string, true); |
| int result = OS.SendMessage (handle, OS.LB_INSERTSTRING, index, buffer); |
| if (result == OS.LB_ERRSPACE) error (SWT.ERROR_ITEM_NOT_ADDED); |
| if (result == OS.LB_ERR) { |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (0 <= index && index <= count) { |
| error (SWT.ERROR_ITEM_NOT_ADDED); |
| } else { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| } |
| if ((style & SWT.H_SCROLL) != 0) setScrollWidth (buffer, true); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the receiver's selection changes, 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 |
| * |
| * @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); |
| } |
| |
| int callWindowProc (int msg, int wParam, int lParam) { |
| if (handle == 0) return 0; |
| return OS.CallWindowProc (ListProc, handle, msg, wParam, lParam); |
| } |
| |
| 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 (); |
| int width = 0, height = 0; |
| if (wHint == SWT.DEFAULT) { |
| if ((style & SWT.H_SCROLL) != 0) { |
| width = OS.SendMessage (handle, OS.LB_GETHORIZONTALEXTENT, 0, 0); |
| } else { |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| int newFont, oldFont = 0; |
| int hDC = OS.GetDC (handle); |
| newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); |
| if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); |
| RECT rect = new RECT (); |
| int flags = OS.DT_CALCRECT | OS.DT_SINGLELINE | OS.DT_NOPREFIX; |
| int cp = getCodePage (); |
| TCHAR buffer = new TCHAR (cp, 64 + 1); |
| for (int i=0; i<count; i++) { |
| int length = OS.SendMessage (handle, OS.LB_GETTEXTLEN, i, 0); |
| if (length != OS.LB_ERR) { |
| if (length + 1 > buffer.length ()) { |
| buffer = new TCHAR (cp, length + 1); |
| } |
| int result = OS.SendMessage (handle, OS.LB_GETTEXT, i, buffer); |
| if (result != OS.LB_ERR) { |
| OS.DrawText (hDC, buffer, length, rect, flags); |
| width = Math.max (width, rect.right - rect.left); |
| } |
| } |
| } |
| if (newFont != 0) OS.SelectObject (hDC, oldFont); |
| OS.ReleaseDC (handle, hDC); |
| } |
| } |
| if (hHint == SWT.DEFAULT) { |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| int itemHeight = OS.SendMessage (handle, OS.LB_GETITEMHEIGHT, 0, 0); |
| height = count * itemHeight; |
| } |
| if (width == 0) width = DEFAULT_WIDTH; |
| if (height == 0) height = DEFAULT_HEIGHT; |
| if (wHint != SWT.DEFAULT) width = wHint; |
| if (hHint != SWT.DEFAULT) height = hHint; |
| int border = getBorderWidth (); |
| width += border * 2 + 3; |
| height += border * 2; |
| if ((style & SWT.V_SCROLL) != 0) { |
| width += OS.GetSystemMetrics (OS.SM_CXVSCROLL); |
| } |
| if ((style & SWT.H_SCROLL) != 0) { |
| height += OS.GetSystemMetrics (OS.SM_CYHSCROLL); |
| } |
| return new Point (width, height); |
| } |
| |
| int defaultBackground () { |
| return OS.GetSysColor (OS.COLOR_WINDOW); |
| } |
| |
| /** |
| * 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; |
| if ((style & SWT.SINGLE) != 0) { |
| int oldIndex = OS.SendMessage (handle, OS.LB_GETCURSEL, 0, 0); |
| if (oldIndex == OS.LB_ERR) return; |
| for (int i=0; i<indices.length; i++) { |
| if (oldIndex == indices [i]) { |
| OS.SendMessage (handle, OS.LB_SETCURSEL, -1, 0); |
| return; |
| } |
| } |
| return; |
| } |
| for (int i=0; i<indices.length; i++) { |
| int index = indices [i]; |
| if (index != -1) { |
| OS.SendMessage (handle, OS.LB_SETSEL, 0, index); |
| } |
| } |
| } |
| |
| /** |
| * 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 == -1) return; |
| if ((style & SWT.SINGLE) != 0) { |
| int oldIndex = OS.SendMessage (handle, OS.LB_GETCURSEL, 0, 0); |
| if (oldIndex == OS.LB_ERR) return; |
| if (oldIndex == index) OS.SendMessage (handle, OS.LB_SETCURSEL, -1, 0); |
| return; |
| } |
| OS.SendMessage (handle, OS.LB_SETSEL, 0, 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. 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 oldIndex = OS.SendMessage (handle, OS.LB_GETCURSEL, 0, 0); |
| if (oldIndex == OS.LB_ERR) return; |
| if (start <= oldIndex && oldIndex <= end) { |
| OS.SendMessage (handle, OS.LB_SETCURSEL, -1, 0); |
| } |
| return; |
| } |
| /* |
| * Ensure that at least one item is contained in |
| * the range from start to end. Note that when |
| * start = end, LB_SELITEMRANGEEX deselects the |
| * item. |
| */ |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (start < 0 && end < 0) return; |
| if (start >= count && end >= count) return; |
| start = Math.min (count - 1, Math.max (0, start)); |
| end = Math.min (count - 1, Math.max (0, end)); |
| OS.SendMessage (handle, OS.LB_SELITEMRANGEEX, end, start); |
| } |
| |
| /** |
| * 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 (); |
| if ((style & SWT.SINGLE) != 0) { |
| OS.SendMessage (handle, OS.LB_SETCURSEL, -1, 0); |
| } else { |
| OS.SendMessage (handle, OS.LB_SETSEL, 0, -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 () { |
| checkWidget (); |
| int result = OS.SendMessage (handle, OS.LB_GETCARETINDEX, 0, 0); |
| if (result == 0) { |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (count == 0) return -1; |
| } |
| return result; |
| } |
| |
| /** |
| * 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_CANNOT_GET_ITEM - if the operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public String getItem (int index) { |
| checkWidget (); |
| int length = OS.SendMessage (handle, OS.LB_GETTEXTLEN, index, 0); |
| if (length != OS.LB_ERR) { |
| TCHAR buffer = new TCHAR (getCodePage (), length + 1); |
| int result = OS.SendMessage (handle, OS.LB_GETTEXT, index, buffer); |
| if (result != OS.LB_ERR) return buffer.toString (0, length); |
| } |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (0 <= index && index < count) { |
| error (SWT.ERROR_CANNOT_GET_ITEM); |
| } else { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| return null; |
| } |
| |
| /** |
| * 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_CANNOT_GET_COUNT - if the operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public int getItemCount () { |
| checkWidget (); |
| int result = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (result == OS.LB_ERR) error (SWT.ERROR_CANNOT_GET_COUNT); |
| return result; |
| } |
| |
| /** |
| * Returns the height of the area which would be used to |
| * display <em>one</em> of the items in the tree. |
| * |
| * @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> |
| * @exception SWTError <ul> |
| * <li>ERROR_CANNOT_GET_ITEM_HEIGHT - if the operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public int getItemHeight () { |
| checkWidget (); |
| int result = OS.SendMessage (handle, OS.LB_GETITEMHEIGHT, 0, 0); |
| if (result == OS.LB_ERR) error (SWT.ERROR_CANNOT_GET_ITEM_HEIGHT); |
| return result; |
| } |
| |
| /** |
| * Returns an 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_CANNOT_GET_ITEM - if the operation fails because of an operating system failure while getting an item</li> |
| * <li>ERROR_CANNOT_GET_COUNT - if the operation fails because of an operating system failure while getting the item count</li> |
| * </ul> |
| */ |
| public String [] getItems () { |
| checkWidget (); |
| int count = getItemCount (); |
| String [] result = new String [count]; |
| for (int i=0; i<count; i++) result [i] = getItem (i); |
| return result; |
| } |
| |
| /** |
| * Returns an array of <code>String</code>s that are currently |
| * selected in the receiver. An empty array indicates that no |
| * items are selected. |
| * <p> |
| * Note: This is not the actual structure used by the receiver |
| * to maintain its selection, so modifying the array will |
| * not affect the receiver. |
| * </p> |
| * @return an array representing the selection |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_CANNOT_GET_SELECTION - if the operation fails because of an operating system failure while getting the selection</li> |
| * <li>ERROR_CANNOT_GET_ITEM - if the operation fails because of an operating system failure while getting an item</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> |
| * @exception SWTError <ul> |
| * <li>ERROR_CANNOT_GET_COUNT - if the operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public int getSelectionCount () { |
| checkWidget (); |
| if ((style & SWT.SINGLE) != 0) { |
| int result = OS.SendMessage (handle, OS.LB_GETCURSEL, 0, 0); |
| if (result == OS.LB_ERR) return 0; |
| return 1; |
| } |
| int result = OS.SendMessage (handle, OS.LB_GETSELCOUNT, 0, 0); |
| if (result == OS.LB_ERR) error (SWT.ERROR_CANNOT_GET_COUNT); |
| return result; |
| } |
| |
| /** |
| * Returns the zero-relative index of the item which is currently |
| * selected in the receiver, or -1 if no item is selected. |
| * |
| * @return the index of the selected item |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_CANNOT_GET_SELECTION - if the operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public int getSelectionIndex () { |
| checkWidget (); |
| if ((style & SWT.SINGLE) != 0) { |
| return OS.SendMessage (handle, OS.LB_GETCURSEL, 0, 0); |
| } |
| int count = OS.SendMessage (handle, OS.LB_GETSELCOUNT, 0, 0); |
| if (count == OS.LB_ERR) error (SWT.ERROR_CANNOT_GET_SELECTION); |
| if (count == 0) return -1; |
| int index = OS.SendMessage (handle, OS.LB_GETCARETINDEX, 0, 0); |
| int result = OS.SendMessage (handle, OS.LB_GETSEL, index, 0); |
| if (result == OS.LB_ERR) error (SWT.ERROR_CANNOT_GET_SELECTION); |
| if (result != 0) return index; |
| int [] buffer = new int [1]; |
| result = OS.SendMessage (handle, OS.LB_GETSELITEMS, 1, buffer); |
| if (result != 1) error (SWT.ERROR_CANNOT_GET_SELECTION); |
| return buffer [0]; |
| } |
| |
| /** |
| * Returns the zero-relative indices of the items which are currently |
| * selected in the receiver. 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_CANNOT_GET_SELECTION - if the operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public int [] getSelectionIndices () { |
| checkWidget (); |
| if ((style & SWT.SINGLE) != 0) { |
| int result = OS.SendMessage (handle, OS.LB_GETCURSEL, 0, 0); |
| if (result == OS.LB_ERR) return new int [0]; |
| return new int [] {result}; |
| } |
| int length = OS.SendMessage (handle, OS.LB_GETSELCOUNT, 0, 0); |
| if (length == OS.LB_ERR) error (SWT.ERROR_CANNOT_GET_SELECTION); |
| int [] indices = new int [length]; |
| int result = OS.SendMessage (handle, OS.LB_GETSELITEMS, length, indices); |
| if (result != length) error (SWT.ERROR_CANNOT_GET_SELECTION); |
| return indices; |
| } |
| |
| /** |
| * 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 (); |
| return OS.SendMessage (handle, OS.LB_GETTOPINDEX, 0, 0); |
| } |
| |
| /** |
| * 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) { |
| return indexOf (string, 0); |
| } |
| |
| /** |
| * 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_CANNOT_GET_COUNT - if the operation fails because of an operating system failure while getting the item count</li> |
| * <li>ERROR_CANNOT_GET_ITEM - if the operation fails because of an operating system failure while getting an item</li> |
| * </ul> |
| */ |
| public int indexOf (String string, int start) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| |
| /* |
| * Bug in Windows. For some reason, LB_FINDSTRINGEXACT |
| * will not find empty strings even though it is legal |
| * to insert an empty string into a list. The fix is |
| * to search the list, an item at a time. |
| */ |
| if (string.length () == 0) { |
| int count = getItemCount (); |
| for (int i=start; i<count; i++) { |
| if (string.equals (getItem (i))) return i; |
| } |
| return -1; |
| } |
| |
| /* Use LB_FINDSTRINGEXACT to search for the item */ |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (!(0 <= start && start < count)) return -1; |
| int index = start - 1, last; |
| TCHAR buffer = new TCHAR (getCodePage (), string, true); |
| do { |
| index = OS.SendMessage (handle, OS.LB_FINDSTRINGEXACT, last = index, buffer); |
| if (index == OS.LB_ERR || index <= last) return -1; |
| } while (!string.equals (getItem (index))); |
| 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 visibility 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 result = OS.SendMessage (handle, OS.LB_GETSEL, index, 0); |
| return (result != 0) && (result != OS.LB_ERR); |
| } |
| |
| /** |
| * 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_ITEM_NOT_REMOVED - if the operation fails because of an operating system failure</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 count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (!(0 <= start && start <= end && end < count)) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| int topIndex = OS.SendMessage (handle, OS.LB_GETTOPINDEX, 0, 0); |
| RECT rect = null; |
| int hDC = 0, oldFont = 0, newFont = 0, newWidth = 0; |
| if ((style & SWT.H_SCROLL) != 0) { |
| rect = new RECT (); |
| hDC = OS.GetDC (handle); |
| newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); |
| if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); |
| } |
| int cp = getCodePage (); |
| int i = 0, topCount = 0, last = -1; |
| while (i < newIndices.length) { |
| int index = newIndices [i]; |
| if (index != last) { |
| TCHAR buffer = null; |
| if ((style & SWT.H_SCROLL) != 0) { |
| int length = OS.SendMessage (handle, OS.LB_GETTEXTLEN, index, 0); |
| if (length == OS.LB_ERR) break; |
| buffer = new TCHAR (cp, length + 1); |
| int result = OS.SendMessage (handle, OS.LB_GETTEXT, index, buffer); |
| if (result == OS.LB_ERR) break; |
| } |
| int result = OS.SendMessage (handle, OS.LB_DELETESTRING, index, 0); |
| if (result == OS.LB_ERR) break; |
| if ((style & SWT.H_SCROLL) != 0) { |
| int flags = OS.DT_CALCRECT | OS.DT_SINGLELINE | OS.DT_NOPREFIX; |
| OS.DrawText (hDC, buffer, -1, rect, flags); |
| newWidth = Math.max (newWidth, rect.right - rect.left); |
| } |
| if (index < topIndex) topCount++; |
| last = index; |
| } |
| i++; |
| } |
| if ((style & SWT.H_SCROLL) != 0) { |
| if (newFont != 0) OS.SelectObject (hDC, oldFont); |
| OS.ReleaseDC (handle, hDC); |
| setScrollWidth (newWidth, false); |
| } |
| if (topCount > 0) { |
| topIndex -= topCount; |
| OS.SendMessage (handle, OS.LB_SETTOPINDEX, topIndex, 0); |
| } |
| if (i < newIndices.length) error (SWT.ERROR_ITEM_NOT_REMOVED); |
| } |
| |
| /** |
| * 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_ITEM_NOT_REMOVED - if the operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public void remove (int index) { |
| checkWidget (); |
| TCHAR buffer = null; |
| if ((style & SWT.H_SCROLL) != 0) { |
| int length = OS.SendMessage (handle, OS.LB_GETTEXTLEN, index, 0); |
| if (length == OS.LB_ERR) error (SWT.ERROR_ITEM_NOT_REMOVED); |
| buffer = new TCHAR (getCodePage (), length + 1); |
| int result = OS.SendMessage (handle, OS.LB_GETTEXT, index, buffer); |
| if (result == OS.LB_ERR) error (SWT.ERROR_ITEM_NOT_REMOVED); |
| } |
| int topIndex = OS.SendMessage (handle, OS.LB_GETTOPINDEX, 0, 0); |
| int result = OS.SendMessage (handle, OS.LB_DELETESTRING, index, 0); |
| if (result == OS.LB_ERR) { |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (0 <= index && index < count) error (SWT.ERROR_ITEM_NOT_REMOVED); |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| if ((style & SWT.H_SCROLL) != 0) setScrollWidth (buffer, false); |
| if (index < topIndex) { |
| OS.SendMessage (handle, OS.LB_SETTOPINDEX, topIndex - 1, 0); |
| } |
| } |
| |
| /** |
| * 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_ITEM_NOT_REMOVED - if the operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public void remove (int start, int end) { |
| checkWidget (); |
| if (start > end) return; |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (!(0 <= start && start <= end && end < count)) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| if (start == 0 && end == count - 1) { |
| removeAll (); |
| return; |
| } |
| int topIndex = OS.SendMessage (handle, OS.LB_GETTOPINDEX, 0, 0); |
| RECT rect = null; |
| int hDC = 0, oldFont = 0, newFont = 0, newWidth = 0; |
| if ((style & SWT.H_SCROLL) != 0) { |
| rect = new RECT (); |
| hDC = OS.GetDC (handle); |
| newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); |
| if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); |
| } |
| int cp = getCodePage (); |
| int index = start; |
| int flags = OS.DT_CALCRECT | OS.DT_SINGLELINE | OS.DT_NOPREFIX; |
| while (index <= end) { |
| TCHAR buffer = null; |
| if ((style & SWT.H_SCROLL) != 0) { |
| int length = OS.SendMessage (handle, OS.LB_GETTEXTLEN, start, 0); |
| if (length == OS.LB_ERR) break; |
| buffer = new TCHAR (cp, length + 1); |
| int result = OS.SendMessage (handle, OS.LB_GETTEXT, start, buffer); |
| if (result == OS.LB_ERR) break; |
| } |
| int result = OS.SendMessage (handle, OS.LB_DELETESTRING, start, 0); |
| if (result == OS.LB_ERR) break; |
| if ((style & SWT.H_SCROLL) != 0) { |
| OS.DrawText (hDC, buffer, -1, rect, flags); |
| newWidth = Math.max (newWidth, rect.right - rect.left); |
| } |
| index++; |
| } |
| if ((style & SWT.H_SCROLL) != 0) { |
| if (newFont != 0) OS.SelectObject (hDC, oldFont); |
| OS.ReleaseDC (handle, hDC); |
| setScrollWidth (newWidth, false); |
| } |
| if (end < topIndex) { |
| topIndex -= end - start + 1; |
| OS.SendMessage (handle, OS.LB_SETTOPINDEX, topIndex, 0); |
| } |
| if (index <= end) 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> |
| * @exception SWTError <ul> |
| * <li>ERROR_ITEM_NOT_REMOVED - if the operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public void remove (String string) { |
| checkWidget (); |
| int index = indexOf (string, 0); |
| if (index == -1) error (SWT.ERROR_INVALID_ARGUMENT); |
| remove (index); |
| } |
| |
| /** |
| * 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.SendMessage (handle, OS.LB_RESETCONTENT, 0, 0); |
| if ((style & SWT.H_SCROLL) != 0) { |
| OS.SendMessage (handle, OS.LB_SETHORIZONTALEXTENT, 0, 0); |
| } |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the receiver's selection changes. |
| * |
| * @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 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; |
| select (indices, false); |
| } |
| |
| void select (int [] indices, boolean scroll) { |
| int i = 0; |
| while (i < indices.length) { |
| int index = indices [i]; |
| if (index != -1) { |
| select (index, false); |
| } |
| i++; |
| } |
| if (scroll) showSelection (); |
| } |
| |
| /** |
| * 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 (); |
| select (index, false); |
| } |
| |
| void select (int index, boolean scroll) { |
| if (index < 0) return; |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (index >= count) return; |
| if (scroll) { |
| if ((style & SWT.SINGLE) != 0) { |
| OS.SendMessage (handle, OS.LB_SETCURSEL, index, 0); |
| } else { |
| OS.SendMessage (handle, OS.LB_SETSEL, 1, index); |
| } |
| return; |
| } |
| int topIndex = OS.SendMessage (handle, OS.LB_GETTOPINDEX, 0, 0); |
| RECT itemRect = new RECT (), selectedRect = null; |
| OS.SendMessage (handle, OS.LB_GETITEMRECT, index, itemRect); |
| boolean redraw = drawCount == 0 && OS.IsWindowVisible (handle); |
| if (redraw) { |
| OS.UpdateWindow (handle); |
| OS.SendMessage (handle, OS.WM_SETREDRAW, 0, 0); |
| } |
| int focusIndex = -1; |
| if ((style & SWT.SINGLE) != 0) { |
| int oldIndex = OS.SendMessage (handle, OS.LB_GETCURSEL, 0, 0); |
| if (oldIndex != -1) { |
| selectedRect = new RECT (); |
| OS.SendMessage (handle, OS.LB_GETITEMRECT, oldIndex, selectedRect); |
| } |
| OS.SendMessage (handle, OS.LB_SETCURSEL, index, 0); |
| } else { |
| focusIndex = OS.SendMessage (handle, OS.LB_GETCARETINDEX, 0, 0); |
| OS.SendMessage (handle, OS.LB_SETSEL, 1, index); |
| } |
| if ((style & SWT.MULTI) != 0) { |
| if (focusIndex != -1) { |
| OS.SendMessage (handle, OS.LB_SETCARETINDEX, focusIndex, 0); |
| } |
| } |
| OS.SendMessage (handle, OS.LB_SETTOPINDEX, topIndex, 0); |
| if (redraw) { |
| OS.SendMessage (handle, OS.WM_SETREDRAW, 1, 0); |
| OS.ValidateRect (handle, null); |
| OS.InvalidateRect (handle, itemRect, true); |
| if (selectedRect != null) { |
| OS.InvalidateRect (handle, selectedRect, true); |
| } |
| } |
| } |
| |
| /** |
| * 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 count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (count == 0 || start >= count) return; |
| start = Math.max (0, start); |
| end = Math.min (end, count - 1); |
| if ((style & SWT.SINGLE) != 0) { |
| select (start, false); |
| } else { |
| select (start, end, false); |
| } |
| } |
| |
| void select (int start, int end, boolean scroll) { |
| /* |
| * Note that when start = end, LB_SELITEMRANGEEX |
| * deselects the item. |
| */ |
| if (start == end) { |
| select (start, scroll); |
| return; |
| } |
| OS.SendMessage (handle, OS.LB_SELITEMRANGEEX, start, end); |
| if (scroll) showSelection (); |
| } |
| |
| /** |
| * 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; |
| OS.SendMessage (handle, OS.LB_SETSEL, 1, -1); |
| } |
| |
| void setBounds (int x, int y, int width, int height, int flags) { |
| /* |
| * Bug in Windows. If the receiver is scrolled horizontally |
| * and is resized, the list does not redraw properly. The fix |
| * is to redraw the control when resizing is not deferred and |
| * the new size is different from the previous size. |
| */ |
| if (parent.lpwp != null || (flags & OS.SWP_NOSIZE) != 0) { |
| super.setBounds (x, y, width, height, flags); |
| return; |
| } |
| RECT rect = new RECT (); |
| OS.GetWindowRect (handle, rect); |
| int oldWidth = rect.right - rect.left; |
| int oldHeight = rect.bottom - rect.top; |
| super.setBounds (x, y, width, height, flags); |
| if (oldWidth == width && oldHeight == height) return; |
| SCROLLINFO info = new SCROLLINFO (); |
| info.cbSize = SCROLLINFO.sizeof; |
| info.fMask = OS.SIF_POS; |
| if (!OS.GetScrollInfo (handle, OS.SB_HORZ, info)) return; |
| if (info.nPos != 0) OS.InvalidateRect (handle, null, true); |
| } |
| |
| void setFocusIndex (int index) { |
| // checkWidget (); |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (!(0 <= index && index < count)) return; |
| OS.SendMessage (handle, OS.LB_SETCARETINDEX, index, 0); |
| } |
| |
| public void setFont (Font font) { |
| checkWidget (); |
| super.setFont (font); |
| if ((style & SWT.H_SCROLL) != 0) setScrollWidth (); |
| } |
| |
| /** |
| * Sets the text of the item in the receiver's list at the given |
| * zero-relative index to the string argument. This is equivalent |
| * to <code>remove</code>'ing the old item at the index, and then |
| * <code>add</code>'ing the new item at that index. |
| * |
| * @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> |
| * @exception SWTError <ul> |
| * <li>ERROR_ITEM_NOT_REMOVED - if the remove operation fails because of an operating system failure</li> |
| * <li>ERROR_ITEM_NOT_ADDED - if the add operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public void setItem (int index, String string) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| int topIndex = getTopIndex (); |
| boolean isSelected = isSelected (index); |
| remove (index); |
| add (string, index); |
| if (isSelected) select (index, false); |
| setTopIndex (topIndex); |
| } |
| |
| /** |
| * 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> |
| * </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> |
| * @exception SWTError <ul> |
| * <li>ERROR_ITEM_NOT_ADDED - if the operation fails because of an operating system failure</li> |
| * </ul> |
| */ |
| public void setItems (String [] items) { |
| checkWidget (); |
| if (items == null) error (SWT.ERROR_NULL_ARGUMENT); |
| int oldProc = OS.GetWindowLong (handle, OS.GWL_WNDPROC); |
| OS.SetWindowLong (handle, OS.GWL_WNDPROC, ListProc); |
| boolean redraw = drawCount == 0 && OS.IsWindowVisible (handle); |
| if (redraw) { |
| OS.SendMessage (handle, OS.WM_SETREDRAW, 0, 0); |
| } |
| RECT rect = null; |
| int hDC = 0, oldFont = 0, newFont = 0, newWidth = 0; |
| if ((style & SWT.H_SCROLL) != 0) { |
| rect = new RECT (); |
| hDC = OS.GetDC (handle); |
| newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); |
| if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); |
| OS.SendMessage (handle, OS.LB_SETHORIZONTALEXTENT, 0, 0); |
| } |
| int length = items.length; |
| OS.SendMessage (handle, OS.LB_RESETCONTENT, 0, 0); |
| OS.SendMessage (handle, OS.LB_INITSTORAGE, length, length * 32); |
| int index = 0; |
| int cp = getCodePage (); |
| while (index < length) { |
| String string = items [index]; |
| if (string == null) break; |
| TCHAR buffer = new TCHAR (cp, string, true); |
| int result = OS.SendMessage (handle, OS.LB_ADDSTRING, 0, buffer); |
| if (result == OS.LB_ERR || result == OS.LB_ERRSPACE) break; |
| if ((style & SWT.H_SCROLL) != 0) { |
| int flags = OS.DT_CALCRECT | OS.DT_SINGLELINE | OS.DT_NOPREFIX; |
| OS.DrawText (hDC, buffer, buffer.length (), rect, flags); |
| newWidth = Math.max (newWidth, rect.right - rect.left); |
| } |
| index++; |
| } |
| if ((style & SWT.H_SCROLL) != 0) { |
| if (newFont != 0) OS.SelectObject (hDC, oldFont); |
| OS.ReleaseDC (handle, hDC); |
| OS.SendMessage (handle, OS.LB_SETHORIZONTALEXTENT, newWidth + 3, 0); |
| } |
| if (redraw) { |
| OS.SendMessage (handle, OS.WM_SETREDRAW, 1, 0); |
| /* |
| * This code is intentionally commented. The window proc |
| * for the list box implements WM_SETREDRAW to invalidate |
| * and erase the widget. This is undocumented behavior. |
| * The commented code below shows what is actually happening |
| * and reminds us that we are relying on this undocumented |
| * behavior. |
| */ |
| // int flags = OS.RDW_ERASE | OS.RDW_FRAME | OS.RDW_INVALIDATE; |
| // OS.RedrawWindow (handle, null, 0, flags); |
| } |
| OS.SetWindowLong (handle, OS.GWL_WNDPROC, oldProc); |
| if (index < items.length) error (SWT.ERROR_ITEM_NOT_ADDED); |
| } |
| |
| void setScrollWidth () { |
| int newWidth = 0; |
| RECT rect = new RECT (); |
| int newFont, oldFont = 0; |
| int hDC = OS.GetDC (handle); |
| newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); |
| if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); |
| int cp = getCodePage (); |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| int flags = OS.DT_CALCRECT | OS.DT_SINGLELINE | OS.DT_NOPREFIX; |
| for (int i=0; i<count; i++) { |
| int length = OS.SendMessage (handle, OS.LB_GETTEXTLEN, i, 0); |
| if (length != OS.LB_ERR) { |
| TCHAR buffer = new TCHAR (cp, length + 1); |
| int result = OS.SendMessage (handle, OS.LB_GETTEXT, i, buffer); |
| if (result != OS.LB_ERR) { |
| OS.DrawText (hDC, buffer, -1, rect, flags); |
| newWidth = Math.max (newWidth, rect.right - rect.left); |
| } |
| } |
| } |
| if (newFont != 0) OS.SelectObject (hDC, oldFont); |
| OS.ReleaseDC (handle, hDC); |
| OS.SendMessage (handle, OS.LB_SETHORIZONTALEXTENT, newWidth + 3, 0); |
| } |
| |
| void setScrollWidth (TCHAR buffer, boolean grow) { |
| RECT rect = new RECT (); |
| int newFont, oldFont = 0; |
| int hDC = OS.GetDC (handle); |
| newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); |
| if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); |
| int flags = OS.DT_CALCRECT | OS.DT_SINGLELINE | OS.DT_NOPREFIX; |
| OS.DrawText (hDC, buffer, -1, rect, flags); |
| if (newFont != 0) OS.SelectObject (hDC, oldFont); |
| OS.ReleaseDC (handle, hDC); |
| setScrollWidth (rect.right - rect.left, grow); |
| } |
| |
| void setScrollWidth (int newWidth, boolean grow) { |
| int width = OS.SendMessage (handle, OS.LB_GETHORIZONTALEXTENT, 0, 0); |
| if (grow) { |
| if (newWidth <= width) return; |
| OS.SendMessage (handle, OS.LB_SETHORIZONTALEXTENT, newWidth + 3, 0); |
| } else { |
| if (newWidth < width) return; |
| setScrollWidth (); |
| } |
| } |
| |
| /** |
| * 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, true); |
| if ((style & SWT.MULTI) != 0) { |
| int focusIndex = indices [0]; |
| if (focusIndex >= 0) 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); |
| deselectAll (); |
| int length = items.length; |
| if (length == 0 || ((style & SWT.SINGLE) != 0 && length > 1)) return; |
| int focusIndex = -1; |
| for (int i=length-1; i>=0; --i) { |
| String string = items [i]; |
| int index = 0; |
| if (string != null) { |
| int localFocus = -1; |
| while ((index = indexOf (string, index)) != -1) { |
| if (localFocus == -1) localFocus = index; |
| select (index, false); |
| if ((style & SWT.SINGLE) != 0 && isSelected (index)) { |
| showSelection (); |
| return; |
| } |
| index++; |
| } |
| if (localFocus != -1) focusIndex = localFocus; |
| } |
| } |
| if ((style & SWT.MULTI) != 0) { |
| if (focusIndex >= 0) setFocusIndex (focusIndex); |
| } |
| } |
| |
| /** |
| * 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 selected is first cleared, then the new items are selected. |
| * Indices that are out of range are ignored. |
| * |
| * @param index the index of the item to select |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @see List#deselectAll() |
| * @see List#select(int) |
| */ |
| public void setSelection (int index) { |
| checkWidget (); |
| if ((style & SWT.MULTI) != 0) deselectAll (); |
| select (index, true); |
| if ((style & SWT.MULTI) != 0) { |
| if (index >= 0) 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 (); |
| deselectAll (); |
| if (end < 0 || start > end || ((style & SWT.SINGLE) != 0 && start != end)) return; |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (count == 0 || start >= count) return; |
| start = Math.max (0, start); |
| end = Math.min (end, count - 1); |
| if ((style & SWT.SINGLE) != 0) { |
| select (start, true); |
| } else { |
| select (start, end, true); |
| setFocusIndex (start); |
| } |
| } |
| |
| /** |
| * 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 result = OS.SendMessage (handle, OS.LB_SETTOPINDEX, index, 0); |
| if (result == OS.LB_ERR) { |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| index = Math.min (count - 1, Math.max (0, index)); |
| OS.SendMessage (handle, OS.LB_SETTOPINDEX, index, 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 index; |
| if ((style & SWT.SINGLE) != 0) { |
| index = OS.SendMessage (handle, OS.LB_GETCURSEL, 0, 0); |
| } else { |
| int [] indices = new int [1]; |
| int result = OS.SendMessage (handle, OS.LB_GETSELITEMS, 1, indices); |
| index = indices [0]; |
| if (result != 1) index = -1; |
| } |
| if (index == -1) return; |
| int count = OS.SendMessage (handle, OS.LB_GETCOUNT, 0, 0); |
| if (count == 0) return; |
| int height = OS.SendMessage (handle, OS.LB_GETITEMHEIGHT, 0, 0); |
| forceResize (); |
| RECT rect = new RECT (); |
| OS.GetClientRect (handle, rect); |
| int topIndex = OS.SendMessage (handle, OS.LB_GETTOPINDEX, 0, 0); |
| int visibleCount = Math.max (rect.bottom / height, 1); |
| int bottomIndex = Math.min (topIndex + visibleCount + 1, count - 1); |
| if ((topIndex <= index) && (index <= bottomIndex)) return; |
| int newTop = Math.min (Math.max (index - (visibleCount / 2), 0), count - 1); |
| OS.SendMessage (handle, OS.LB_SETTOPINDEX, newTop, 0); |
| } |
| |
| int widgetStyle () { |
| int bits = super.widgetStyle () | OS.LBS_NOTIFY | OS.LBS_NOINTEGRALHEIGHT; |
| if ((style & SWT.SINGLE) != 0) return bits; |
| if ((style & SWT.MULTI) != 0) { |
| if ((style & SWT.SIMPLE) != 0) return bits | OS.LBS_MULTIPLESEL; |
| return bits | OS.LBS_EXTENDEDSEL; |
| } |
| return bits; |
| } |
| |
| TCHAR windowClass () { |
| return ListClass; |
| } |
| |
| int windowProc () { |
| return ListProc; |
| } |
| |
| LRESULT wmCommandChild (int wParam, int lParam) { |
| int code = wParam >> 16; |
| switch (code) { |
| case OS.LBN_SELCHANGE: |
| postEvent (SWT.Selection); |
| break; |
| case OS.LBN_DBLCLK: |
| postEvent (SWT.DefaultSelection); |
| break; |
| } |
| return super.wmCommandChild (wParam, lParam); |
| } |
| |
| |
| |
| } |