| /******************************************************************************* |
| * Copyright (c) 2000, 2003 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 are selectable user interface |
| * objects that allow the user to enter and modify text. |
| * <p> |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>CENTER, LEFT, MULTI, SINGLE, RIGHT, READ_ONLY, WRAP</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>DefaultSelection, Modify, Verify</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the styles MULTI and SINGLE may be specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| */ |
| public class Text extends Scrollable { |
| int tabs, oldStart, oldEnd; |
| boolean doubleClick, ignoreVerify, ignoreCharacter; |
| |
| /** |
| * The maximum number of characters that can be entered |
| * into a text widget. |
| */ |
| public static final int LIMIT; |
| |
| /** |
| * The delimiter used by multi-line text widgets. When text |
| * is queried and from the widget, it will be delimited using |
| * this delimiter. |
| */ |
| public static final String DELIMITER; |
| |
| /* |
| * This code is intentionally commented. |
| */ |
| // static final char PASSWORD; |
| |
| /* |
| * These values can be different on different platforms. |
| * Therefore they are not initialized in the declaration |
| * to stop the compiler from inlining. |
| */ |
| static { |
| LIMIT = OS.IsWinNT ? 0x7FFFFFFF : 0x7FFF; |
| DELIMITER = "\r\n"; |
| } |
| |
| static final int EditProc; |
| static final TCHAR EditClass = new TCHAR (0, "EDIT", true); |
| static { |
| WNDCLASS lpWndClass = new WNDCLASS (); |
| OS.GetClassInfo (0, EditClass, lpWndClass); |
| EditProc = lpWndClass.lpfnWndProc; |
| /* |
| * This code is intentionally commented. |
| */ |
| // int hwndText = OS.CreateWindowEx (0, |
| // EditClass, |
| // null, |
| // OS.WS_OVERLAPPED | OS.ES_PASSWORD, |
| // 0, 0, 0, 0, |
| // 0, |
| // 0, |
| // OS.GetModuleHandle (null), |
| // null); |
| // char echo = (char) OS.SendMessage (hwndText, OS.EM_GETPASSWORDCHAR, 0, 0); |
| // OS.DestroyWindow (hwndText); |
| // PASSWORD = echo != 0 ? echo : '*'; |
| } |
| |
| /** |
| * 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 SWT#READ_ONLY |
| * @see SWT#WRAP |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Text (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| int callWindowProc (int msg, int wParam, int lParam) { |
| if (handle == 0) return 0; |
| return OS.CallWindowProc (EditProc, handle, msg, wParam, lParam); |
| } |
| |
| void createHandle () { |
| super.createHandle (); |
| OS.SendMessage (handle, OS.EM_LIMITTEXT, 0, 0); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the receiver's text is modified, by sending |
| * it one of the messages defined in the <code>ModifyListener</code> |
| * interface. |
| * |
| * @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 ModifyListener |
| * @see #removeModifyListener |
| */ |
| public void addModifyListener (ModifyListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| TypedListener typedListener = new TypedListener (listener); |
| addListener (SWT.Modify, typedListener); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the control is selected, by sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * <code>widgetSelected</code> is not called for texts. |
| * <code>widgetDefaultSelected</code> is typically called when ENTER is pressed in a single-line text. |
| * </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); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the receiver's text is verified, by sending |
| * it one of the messages defined in the <code>VerifyListener</code> |
| * interface. |
| * |
| * @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 VerifyListener |
| * @see #removeVerifyListener |
| */ |
| public void addVerifyListener (VerifyListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| TypedListener typedListener = new TypedListener (listener); |
| addListener (SWT.Verify, typedListener); |
| } |
| |
| /** |
| * Appends a string. |
| * <p> |
| * The new text is appended to the text at |
| * the end of the widget. |
| * </p> |
| * |
| * @param string the string to be appended |
| * |
| * @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 void append (String string) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| string = Display.withCrLf (string); |
| int length = OS.GetWindowTextLength (handle); |
| if (hooks (SWT.Verify) || filters (SWT.Verify)) { |
| string = verifyText (string, length, length, null); |
| if (string == null) return; |
| } |
| OS.SendMessage (handle, OS.EM_SETSEL, length, length); |
| TCHAR buffer = new TCHAR (getCodePage (), string, true); |
| /* |
| * Feature in Windows. When an edit control with ES_MULTILINE |
| * style that does not have the WS_VSCROLL style is full (i.e. |
| * there is no space at the end to draw any more characters), |
| * EM_REPLACESEL sends a WM_CHAR with a backspace character |
| * to remove any further text that is added. This is an |
| * implementation detail of the edit control that is unexpected |
| * and can cause endless recursion when EM_REPLACESEL is sent |
| * from a WM_CHAR handler. The fix is to ignore calling the |
| * handler from WM_CHAR. |
| */ |
| ignoreCharacter = true; |
| OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); |
| ignoreCharacter = false; |
| OS.SendMessage (handle, OS.EM_SCROLLCARET, 0, 0); |
| } |
| |
| static int checkStyle (int style) { |
| style = checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0); |
| if ((style & SWT.SINGLE) != 0) style &= ~(SWT.H_SCROLL | SWT.V_SCROLL | SWT.WRAP); |
| if ((style & SWT.WRAP) != 0) style |= SWT.MULTI; |
| if ((style & SWT.MULTI) != 0) style &= ~SWT.PASSWORD; |
| if ((style & (SWT.SINGLE | SWT.MULTI)) != 0) return style; |
| if ((style & (SWT.H_SCROLL | SWT.V_SCROLL)) != 0) return style | SWT.MULTI; |
| return style | SWT.SINGLE; |
| } |
| |
| /** |
| * Clears 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 void clearSelection () { |
| checkWidget (); |
| if (OS.IsWinCE) { |
| /* |
| * Bug in WinCE. Calling EM_SETSEL with -1 and 0 is equivalent |
| * to calling EM_SETSEL with 0 and -1. It causes the entire |
| * text to be selected instead of clearing the selection. The |
| * fix is to set the start of the selection to the end of the |
| * current selection. |
| */ |
| int [] end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, (int []) null, end); |
| OS.SendMessage (handle, OS.EM_SETSEL, end [0], end [0]); |
| } else { |
| OS.SendMessage (handle, OS.EM_SETSEL, -1, 0); |
| } |
| } |
| |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget (); |
| int height = 0, width = 0; |
| if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) { |
| 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); |
| TEXTMETRIC tm = OS.IsUnicode ? (TEXTMETRIC) new TEXTMETRICW () : new TEXTMETRICA (); |
| OS.GetTextMetrics (hDC, tm); |
| int count = OS.SendMessage (handle, OS.EM_GETLINECOUNT, 0, 0); |
| height = count * tm.tmHeight; |
| RECT rect = new RECT (); |
| int flags = OS.DT_CALCRECT | OS.DT_EDITCONTROL | OS.DT_NOPREFIX; |
| boolean wrap = (style & SWT.MULTI) != 0 && (style & SWT.WRAP) != 0; |
| if (wrap && wHint != SWT.DEFAULT) { |
| flags |= OS.DT_WORDBREAK; |
| rect.right = wHint; |
| } |
| String text = getText (); |
| TCHAR buffer = new TCHAR (getCodePage (), text, false); |
| int length = buffer.length (); |
| if (length != 0) { |
| OS.DrawText (hDC, buffer, length, rect, flags); |
| width = rect.right - rect.left; |
| } |
| if (wrap && hHint == SWT.DEFAULT) { |
| int newHeight = rect.bottom - rect.top; |
| if (newHeight != 0) height = newHeight; |
| } |
| if (newFont != 0) OS.SelectObject (hDC, oldFont); |
| OS.ReleaseDC (handle, hDC); |
| } |
| if (width == 0) width = DEFAULT_WIDTH; |
| if (height == 0) height = DEFAULT_HEIGHT; |
| if (wHint != SWT.DEFAULT) width = wHint; |
| if (hHint != SWT.DEFAULT) height = hHint; |
| |
| /* Calculate the margin width */ |
| int margins = OS.SendMessage(handle, OS.EM_GETMARGINS, 0, 0); |
| int marginWidth = (margins & 0xFFFF) + ((margins >> 16) & 0xFFFF); |
| width += marginWidth; |
| |
| /* |
| * The preferred height of a single-line text widget |
| * has been hand-crafted to be the same height as |
| * the single-line text widget in an editable combo |
| * box. |
| */ |
| if ((style & SWT.V_SCROLL) != 0) { |
| width += OS.GetSystemMetrics (OS.SM_CXVSCROLL); |
| } |
| if ((style & SWT.H_SCROLL) != 0) { |
| height += OS.GetSystemMetrics (OS.SM_CYHSCROLL); |
| if ((style & SWT.BORDER) == 0) width++; |
| } |
| if ((style & SWT.BORDER) != 0) { |
| int border = getBorderWidth (); |
| width += (border * 2) + 3; |
| height += (border * 2) + 3; |
| } |
| return new Point (width, height); |
| } |
| |
| /** |
| * Copies the selected text. |
| * <p> |
| * The current selection is copied to the clipboard. |
| * </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 copy () { |
| checkWidget (); |
| OS.SendMessage (handle, OS.WM_COPY, 0, 0); |
| } |
| |
| void createWidget () { |
| super.createWidget (); |
| doubleClick = true; |
| setTabStops (tabs = 8); |
| fixAlignment (); |
| } |
| |
| /** |
| * Cuts the selected text. |
| * <p> |
| * The current selection is first copied to the |
| * clipboard and then deleted from the widget. |
| * </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 cut () { |
| checkWidget (); |
| OS.SendMessage (handle, OS.WM_CUT, 0, 0); |
| } |
| |
| int defaultBackground () { |
| return OS.GetSysColor (OS.COLOR_WINDOW); |
| } |
| |
| void fixAlignment () { |
| /* |
| * Feature in Windows. When the edit control is not |
| * mirrored, it uses WS_EX_RIGHT, WS_EX_RTLREADING and |
| * WS_EX_LEFTSCROLLBAR to give the control a right to |
| * left appearance. This causes the control to be lead |
| * aligned no matter what alignment was specified by |
| * the programmer. For example, setting ES_RIGHT and |
| * WS_EX_LAYOUTRTL should cause the contents of the |
| * control to be left (trail) aligned in a mirrored world. |
| * When the orientation is changed by the user or |
| * specified by the programmer, WS_EX_RIGHT conflicts |
| * with the mirrored alignment. The fix is to clear |
| * or set WS_EX_RIGHT to achieve the correct alignment |
| * according to the orientation and mirroring. |
| */ |
| if ((style & SWT.MIRRORED) != 0) return; |
| int bits0 = OS.GetWindowLong (handle, OS.GWL_EXSTYLE); |
| int bits1 = OS.GetWindowLong (handle, OS.GWL_STYLE); |
| if ((style & SWT.LEFT_TO_RIGHT) != 0) { |
| if ((style & SWT.RIGHT) != 0) { |
| bits0 |= OS.WS_EX_RIGHT; |
| bits1 |= OS.ES_RIGHT; |
| } |
| if ((style & SWT.LEFT) != 0) { |
| bits0 &= ~OS.WS_EX_RIGHT; |
| bits1 &= ~OS.ES_RIGHT; |
| } |
| } else { |
| if ((style & SWT.RIGHT) != 0) { |
| bits0 &= ~OS.WS_EX_RIGHT; |
| bits1 &= ~OS.ES_RIGHT; |
| } |
| if ((style & SWT.LEFT) != 0) { |
| bits0 |= OS.WS_EX_RIGHT; |
| bits1 |= OS.ES_RIGHT; |
| } |
| } |
| if ((style & SWT.CENTER) != 0) { |
| bits1 |= OS.ES_CENTER; |
| } |
| OS.SetWindowLong (handle, OS.GWL_EXSTYLE, bits0); |
| OS.SetWindowLong (handle, OS.GWL_STYLE, bits1); |
| } |
| |
| public int getBorderWidth () { |
| checkWidget (); |
| /* |
| * Feature in Windows 2000 and XP. Despite the fact that WS_BORDER |
| * is set when the edit control is created, the style bit is cleared. |
| * The fix is to avoid the check for WS_BORDER and use the SWT widget |
| * style bits instead. |
| */ |
| // if ((style & SWT.BORDER) != 0 && (style & SWT.FLAT) != 0) { |
| // return OS.GetSystemMetrics (OS.SM_CXBORDER); |
| // } |
| return super.getBorderWidth (); |
| } |
| |
| /** |
| * Gets the line number of the caret. |
| * <p> |
| * The line number of the caret is returned. |
| * </p> |
| * |
| * @return the line number |
| * |
| * @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 getCaretLineNumber () { |
| checkWidget (); |
| return OS.SendMessage (handle, OS.EM_LINEFROMCHAR, -1, 0); |
| } |
| |
| /** |
| * Gets the location the caret. |
| * <p> |
| * The location of the caret is returned. |
| * </p> |
| * |
| * @return a point, the location of the caret |
| * |
| * @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 Point getCaretLocation () { |
| checkWidget (); |
| /* |
| * Bug in Windows. For some reason, Windows is unable |
| * to return the pixel coordinates of the last character |
| * in the widget. The fix is to temporarily insert a |
| * space, query the coordinates and delete the space. |
| * The selection is always an i-beam in this case because |
| * this is the only time the start of the selection can |
| * be equal to the last character position in the widget. |
| * If EM_POSFROMCHAR fails for any other reason, return |
| * pixel coordinates (0,0). |
| */ |
| int [] start = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, (int []) null); |
| int pos = OS.SendMessage (handle, OS.EM_POSFROMCHAR, start [0], 0); |
| if (pos == -1) { |
| pos = 0; |
| if (start [0] >= OS.GetWindowTextLength (handle)) { |
| int cp = getCodePage (); |
| /* |
| * Feature in Windows. When an edit control with ES_MULTILINE |
| * style that does not have the WS_VSCROLL style is full (i.e. |
| * there is no space at the end to draw any more characters), |
| * EM_REPLACESEL sends a WM_CHAR with a backspace character |
| * to remove any further text that is added. This is an |
| * implementation detail of the edit control that is unexpected |
| * and can cause endless recursion when EM_REPLACESEL is sent |
| * from a WM_CHAR handler. The fix is to ignore calling the |
| * handler from WM_CHAR. |
| */ |
| ignoreCharacter = true; |
| OS.SendMessage (handle, OS.EM_REPLACESEL, 0, new TCHAR (cp, " ", true)); |
| pos = OS.SendMessage (handle, OS.EM_POSFROMCHAR, start [0], 0); |
| OS.SendMessage (handle, OS.EM_SETSEL, start [0], start [0] + 1); |
| OS.SendMessage (handle, OS.EM_REPLACESEL, 0, new TCHAR (cp, "", true)); |
| ignoreCharacter = false; |
| } |
| } |
| return new Point ((short) (pos & 0xFFFF), (short) (pos >> 16)); |
| } |
| |
| /** |
| * Gets the position of the caret. |
| * <p> |
| * The character position of the caret is returned. |
| * </p> |
| * |
| * @return the position of the caret |
| * |
| * @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 getCaretPosition () { |
| checkWidget (); |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| int startLine = OS.SendMessage (handle, OS.EM_LINEFROMCHAR, start [0], 0); |
| int caretPos = OS.SendMessage (handle, OS.EM_LINEINDEX, -1, 0); |
| int caretLine = OS.SendMessage (handle, OS.EM_LINEFROMCHAR, caretPos, 0); |
| int caret = end [0]; |
| if (caretLine == startLine) caret = start [0]; |
| if (OS.IsDBLocale) caret = mbcsToWcsPos (caret); |
| return caret; |
| } |
| |
| /** |
| * Gets the number of characters. |
| * |
| * @return number of characters in the widget |
| * |
| * @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 getCharCount () { |
| checkWidget (); |
| int length = OS.GetWindowTextLength (handle); |
| if (OS.IsDBLocale) length = mbcsToWcsPos (length); |
| return length; |
| } |
| |
| String getClipboardText () { |
| String string = ""; |
| if (OS.OpenClipboard (0)) { |
| int hMem = OS.GetClipboardData (OS.IsUnicode ? OS.CF_UNICODETEXT : OS.CF_TEXT); |
| if (hMem != 0) { |
| /* Ensure byteCount is a multiple of 2 bytes on UNICODE platforms */ |
| int byteCount = OS.GlobalSize (hMem) / TCHAR.sizeof * TCHAR.sizeof; |
| int ptr = OS.GlobalLock (hMem); |
| if (ptr != 0) { |
| /* Use the character encoding for the default locale */ |
| TCHAR buffer = new TCHAR (0, byteCount / TCHAR.sizeof); |
| OS.MoveMemory (buffer, ptr, byteCount); |
| string = buffer.toString (0, buffer.strlen ()); |
| OS.GlobalUnlock (hMem); |
| } |
| } |
| OS.CloseClipboard (); |
| } |
| return string; |
| } |
| |
| /** |
| * Gets the double click enabled flag. |
| * <p> |
| * The double click flag enables or disables the |
| * default action of the text widget when the user |
| * double clicks. |
| * </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 boolean getDoubleClickEnabled () { |
| checkWidget (); |
| return doubleClick; |
| } |
| |
| /** |
| * Gets the echo character. |
| * <p> |
| * The echo character is the character that is |
| * displayed when the user enters text or the |
| * text is changed by the programmer. |
| * </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 char getEchoChar () { |
| checkWidget (); |
| char echo = (char) OS.SendMessage (handle, OS.EM_GETPASSWORDCHAR, 0, 0); |
| if (echo != 0 && (echo = mbcsToWcs (echo, getCodePage ())) == 0) echo = '*'; |
| return echo; |
| } |
| |
| /** |
| * Gets the editable state. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public boolean getEditable () { |
| checkWidget (); |
| int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); |
| return (bits & OS.ES_READONLY) == 0; |
| } |
| |
| /** |
| * Gets the number of lines. |
| * |
| * @return the number of lines in the widget |
| * |
| * @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 getLineCount () { |
| checkWidget (); |
| return OS.SendMessage (handle, OS.EM_GETLINECOUNT, 0, 0); |
| } |
| |
| /** |
| * Gets the line delimiter. |
| * |
| * @return a string that is the line delimiter |
| * |
| * @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 getLineDelimiter () { |
| checkWidget (); |
| return DELIMITER; |
| } |
| |
| /** |
| * Gets the height of a line. |
| * |
| * @return the height of a row of text |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getLineHeight () { |
| checkWidget (); |
| 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); |
| TEXTMETRIC tm = OS.IsUnicode ? (TEXTMETRIC) new TEXTMETRICW () : new TEXTMETRICA (); |
| OS.GetTextMetrics (hDC, tm); |
| if (newFont != 0) OS.SelectObject (hDC, oldFont); |
| OS.ReleaseDC (handle, hDC); |
| return tm.tmHeight; |
| } |
| |
| /** |
| * Returns the orientation of the receiver. |
| * |
| * @return the orientation style |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @since 2.1.2 |
| */ |
| public int getOrientation () { |
| checkWidget(); |
| return style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT); |
| } |
| |
| /** |
| * Gets the position of the selected text. |
| * <p> |
| * Indexing is zero based. The range of |
| * a selection is from 0..N where N is |
| * the number of characters in the widget. |
| * </p> |
| * |
| * @return the start and end of 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 Point getSelection () { |
| checkWidget (); |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| if (OS.IsDBLocale) { |
| start [0] = mbcsToWcsPos (start [0]); |
| end [0] = mbcsToWcsPos (end [0]); |
| } |
| return new Point (start [0], end [0]); |
| } |
| |
| /** |
| * Gets the number of selected characters. |
| * |
| * @return the number of selected characters. |
| * |
| * @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 (); |
| Point selection = getSelection (); |
| return selection.y - selection.x; |
| } |
| |
| /** |
| * Gets the selected text. |
| * |
| * @return the selected text |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String getSelectionText () { |
| checkWidget (); |
| /* |
| * NOTE: The current implementation uses substring () |
| * which can reference a potentially large character |
| * array. |
| */ |
| Point selection = getSelection (); |
| return getText ().substring (selection.x, selection.y); |
| } |
| |
| /** |
| * Gets the number of tabs. |
| * <p> |
| * Tab stop spacing is specified in terms of the |
| * space (' ') character. The width of a single |
| * tab stop is the pixel width of the spaces. |
| * </p> |
| * |
| * @return the number of tab characters |
| * |
| * @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 getTabs () { |
| checkWidget (); |
| return tabs; |
| } |
| |
| int getTabWidth (int tabs) { |
| int oldFont = 0; |
| RECT rect = new RECT (); |
| int hDC = OS.GetDC (handle); |
| int 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; |
| TCHAR SPACE = new TCHAR (getCodePage (), " ", false); |
| OS.DrawText (hDC, SPACE, SPACE.length (), rect, flags); |
| if (newFont != 0) OS.SelectObject (hDC, oldFont); |
| OS.ReleaseDC (handle, hDC); |
| return (rect.right - rect.left) * tabs; |
| } |
| |
| /** |
| * Gets the widget text. |
| * <p> |
| * The text for a text widget is the characters in the widget. |
| * </p> |
| * |
| * @return the widget text |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String getText () { |
| checkWidget (); |
| int length = OS.GetWindowTextLength (handle); |
| if (length == 0) return ""; |
| TCHAR buffer = new TCHAR (getCodePage (), length + 1); |
| OS.GetWindowText (handle, buffer, length + 1); |
| return buffer.toString (0, length); |
| } |
| |
| /** |
| * Gets a range of text. |
| * <p> |
| * Indexing is zero based. The range of |
| * a selection is from 0..N-1 where N is |
| * the number of characters in the widget. |
| * </p> |
| * |
| * @param start the start of the range |
| * @param end the end of the range |
| * @return the range of text |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of characters minus 1 (inclusive), or if start is greater than end</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 getText (int start, int end) { |
| checkWidget (); |
| int length = OS.GetWindowTextLength (handle); |
| if (OS.IsDBLocale) length = mbcsToWcsPos (length); |
| if (!(0 <= start && start <= end && end < length)) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| /* |
| * NOTE: The current implementation uses substring () |
| * which can reference a potentially large character |
| * array. |
| */ |
| return getText ().substring (start, end + 1); |
| } |
| |
| /** |
| * Returns the maximum number of characters that the receiver is capable of holding. |
| * <p> |
| * If this has not been changed by <code>setTextLimit()</code>, |
| * it will be the constant <code>Text.LIMIT</code>. |
| * </p> |
| * |
| * @return the text limit |
| * |
| * @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 getTextLimit () { |
| checkWidget (); |
| return OS.SendMessage (handle, OS.EM_GETLIMITTEXT, 0, 0); |
| } |
| |
| /** |
| * Returns the zero-relative index of the line which is currently |
| * at the top of the receiver. |
| * <p> |
| * This index can change when lines are scrolled or new lines are added or removed. |
| * </p> |
| * |
| * @return the index of the top line |
| * |
| * @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 (); |
| if ((style & SWT.SINGLE) != 0) return 0; |
| return OS.SendMessage (handle, OS.EM_GETFIRSTVISIBLELINE, 0, 0); |
| } |
| |
| /** |
| * Gets the top pixel. |
| * <p> |
| * The top pixel is the pixel position of the line |
| * that is currently at the top of the widget. On |
| * some platforms, a text widget can be scrolled by |
| * pixels instead of lines so that a partial line |
| * is displayed at the top of the widget. |
| * </p><p> |
| * The top pixel changes when the widget is scrolled. |
| * The top pixel does not include the widget trimming. |
| * </p> |
| * |
| * @return the pixel position of the top line |
| * |
| * @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 getTopPixel () { |
| checkWidget (); |
| /* |
| * Note, EM_GETSCROLLPOS is implemented in Rich Edit 3.0 |
| * and greater. The plain text widget and previous versions |
| * of Rich Edit return zero. |
| */ |
| int [] buffer = new int [2]; |
| int code = OS.SendMessage (handle, OS.EM_GETSCROLLPOS, 0, buffer); |
| if (code == 1) return buffer [1]; |
| return getTopIndex () * getLineHeight (); |
| } |
| |
| /** |
| * Inserts a string. |
| * <p> |
| * The old selection is replaced with the new text. |
| * </p> |
| * |
| * @param string the string |
| * |
| * @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 insert (String string) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| string = Display.withCrLf (string); |
| if (hooks (SWT.Verify) || filters (SWT.Verify)) { |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| string = verifyText (string, start [0], end [0], null); |
| if (string == null) return; |
| } |
| TCHAR buffer = new TCHAR (getCodePage (), string, true); |
| /* |
| * Feature in Windows. When an edit control with ES_MULTILINE |
| * style that does not have the WS_VSCROLL style is full (i.e. |
| * there is no space at the end to draw any more characters), |
| * EM_REPLACESEL sends a WM_CHAR with a backspace character |
| * to remove any further text that is added. This is an |
| * implementation detail of the edit control that is unexpected |
| * and can cause endless recursion when EM_REPLACESEL is sent |
| * from a WM_CHAR handler. The fix is to ignore calling the |
| * handler from WM_CHAR. |
| */ |
| ignoreCharacter = true; |
| OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); |
| ignoreCharacter = false; |
| } |
| |
| int mbcsToWcsPos (int mbcsPos) { |
| if (mbcsPos == 0) return 0; |
| if (OS.IsUnicode) return mbcsPos; |
| int cp = getCodePage (); |
| int wcsTotal = 0, mbcsTotal = 0; |
| byte [] buffer = new byte [128]; |
| String delimiter = getLineDelimiter(); |
| int delimiterSize = delimiter.length (); |
| int count = OS.SendMessageA (handle, OS.EM_GETLINECOUNT, 0, 0); |
| for (int line=0; line<count; line++) { |
| int wcsSize = 0; |
| int linePos = OS.SendMessageA (handle, OS.EM_LINEINDEX, line, 0); |
| int mbcsSize = OS.SendMessageA (handle, OS.EM_LINELENGTH, linePos, 0); |
| if (mbcsSize != 0) { |
| if (mbcsSize + delimiterSize > buffer.length) { |
| buffer = new byte [mbcsSize + delimiterSize]; |
| } |
| buffer [0] = (byte) (mbcsSize & 0xFF); |
| buffer [1] = (byte) (mbcsSize >> 8); |
| mbcsSize = OS.SendMessageA (handle, OS.EM_GETLINE, line, buffer); |
| wcsSize = OS.MultiByteToWideChar (cp, OS.MB_PRECOMPOSED, buffer, mbcsSize, null, 0); |
| } |
| if (line - 1 != count) { |
| for (int i=0; i<delimiterSize; i++) { |
| buffer [mbcsSize++] = (byte) delimiter.charAt (i); |
| } |
| wcsSize += delimiterSize; |
| } |
| if ((mbcsTotal + mbcsSize) >= mbcsPos) { |
| int bufferSize = mbcsPos - mbcsTotal; |
| wcsSize = OS.MultiByteToWideChar (cp, OS.MB_PRECOMPOSED, buffer, bufferSize, null, 0); |
| return wcsTotal + wcsSize; |
| } |
| wcsTotal += wcsSize; |
| mbcsTotal += mbcsSize; |
| } |
| return wcsTotal; |
| } |
| |
| /** |
| * Pastes text from clipboard. |
| * <p> |
| * The selected text is deleted from the widget |
| * and new text inserted from the clipboard. |
| * </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 paste () { |
| checkWidget (); |
| OS.SendMessage (handle, OS.WM_PASTE, 0, 0); |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the receiver's text is modified. |
| * |
| * @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 ModifyListener |
| * @see #addModifyListener |
| */ |
| public void removeModifyListener (ModifyListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) return; |
| eventTable.unhook (SWT.Modify, listener); |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the control is selected. |
| * |
| * @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 #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); |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the control is verified. |
| * |
| * @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 VerifyListener |
| * @see #addVerifyListener |
| */ |
| public void removeVerifyListener (VerifyListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) return; |
| eventTable.unhook (SWT.Verify, listener); |
| } |
| |
| /** |
| * Selects all the text 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 selectAll () { |
| checkWidget (); |
| OS.SendMessage (handle, OS.EM_SETSEL, 0, -1); |
| } |
| |
| boolean sendKeyEvent (int type, int msg, int wParam, int lParam, Event event) { |
| if (!super.sendKeyEvent (type, msg, wParam, lParam, event)) { |
| return false; |
| } |
| if (ignoreVerify) return true; |
| if (type != SWT.KeyDown) return true; |
| if (msg != OS.WM_CHAR && msg != OS.WM_KEYDOWN && msg != OS.WM_IME_CHAR) { |
| return true; |
| } |
| if (event.character == 0) return true; |
| if (!hooks (SWT.Verify) && !filters (SWT.Verify)) return true; |
| char key = event.character; |
| int stateMask = event.stateMask; |
| |
| /* |
| * Disable all magic keys that could modify the text |
| * and don't send events when Alt, Shift or Ctrl is |
| * pressed. |
| */ |
| switch (msg) { |
| case OS.WM_CHAR: |
| if (key != 0x08 && key != 0x7F && key != '\r' && key != '\t' && key != '\n') break; |
| // FALL THROUGH |
| case OS.WM_KEYDOWN: |
| if ((stateMask & (SWT.ALT | SWT.SHIFT | SWT.CONTROL)) != 0) return false; |
| break; |
| } |
| |
| /* |
| * If the left button is down, the text widget refuses the character. |
| */ |
| if (OS.GetKeyState (OS.VK_LBUTTON) < 0) { |
| return true; |
| } |
| |
| /* Verify the character */ |
| String oldText = ""; |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| switch (key) { |
| case 0x08: /* Bs */ |
| if (start [0] == end [0]) { |
| if (start [0] == 0) return true; |
| int lineStart = OS.SendMessage (handle, OS.EM_LINEINDEX, -1, 0); |
| if (start [0] == lineStart) { |
| start [0] = start [0] - DELIMITER.length (); |
| } else { |
| start [0] = start [0] - 1; |
| if (OS.IsDBLocale) { |
| int [] newStart = new int [1], newEnd = new int [1]; |
| OS.SendMessage (handle, OS.EM_SETSEL, start [0], end [0]); |
| OS.SendMessage (handle, OS.EM_GETSEL, newStart, newEnd); |
| if (start [0] != newStart [0]) start [0] = start [0] - 1; |
| } |
| } |
| start [0] = Math.max (start [0], 0); |
| } |
| break; |
| case 0x7F: /* Del */ |
| if (start [0] == end [0]) { |
| int length = OS.GetWindowTextLength (handle); |
| if (start [0] == length) return true; |
| int line = OS.SendMessage (handle, OS.EM_LINEFROMCHAR, end [0], 0); |
| int lineStart = OS.SendMessage (handle, OS.EM_LINEINDEX, line + 1, 0); |
| if (end [0] == lineStart - DELIMITER.length ()) { |
| end [0] = end [0] + DELIMITER.length (); |
| } else { |
| end [0] = end [0] + 1; |
| if (OS.IsDBLocale) { |
| int [] newStart = new int [1], newEnd = new int [1]; |
| OS.SendMessage (handle, OS.EM_SETSEL, start [0], end [0]); |
| OS.SendMessage (handle, OS.EM_GETSEL, newStart, newEnd); |
| if (end [0] != newEnd [0]) end [0] = end [0] + 1; |
| } |
| } |
| end [0] = Math.min (end [0], length); |
| } |
| break; |
| case '\r': /* Return */ |
| if ((style & SWT.SINGLE) != 0) return true; |
| oldText = DELIMITER; |
| break; |
| default: /* Tab and other characters */ |
| if (key != '\t' && key < 0x20) return true; |
| oldText = new String (new char [] {key}); |
| break; |
| } |
| String newText = verifyText (oldText, start [0], end [0], event); |
| if (newText == null) return false; |
| if (newText == oldText) return true; |
| newText = Display.withCrLf (newText); |
| TCHAR buffer = new TCHAR (getCodePage (), newText, true); |
| OS.SendMessage (handle, OS.EM_SETSEL, start [0], end [0]); |
| /* |
| * Feature in Windows. When an edit control with ES_MULTILINE |
| * style that does not have the WS_VSCROLL style is full (i.e. |
| * there is no space at the end to draw any more characters), |
| * EM_REPLACESEL sends a WM_CHAR with a backspace character |
| * to remove any further text that is added. This is an |
| * implementation detail of the edit control that is unexpected |
| * and can cause endless recursion when EM_REPLACESEL is sent |
| * from a WM_CHAR handler. The fix is to ignore calling the |
| * handler from WM_CHAR. |
| */ |
| ignoreCharacter = true; |
| OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); |
| ignoreCharacter = false; |
| return false; |
| } |
| |
| void setBounds (int x, int y, int width, int height, int flags) { |
| /* |
| * Feature in Windows. When the caret is moved, |
| * the text widget scrolls to show the new location. |
| * This means that the text widget may be scrolled |
| * to the right in order to show the caret when the |
| * widget is not large enough to show both the caret |
| * location and all the text. Unfortunately, when |
| * the text widget is resized such that all the text |
| * and the caret could be visible, Windows does not |
| * scroll the widget back. The fix is to resize the |
| * text widget, set the selection to the start of the |
| * text and then restore the selection. This will |
| * cause the text widget compute the correct scroll |
| * position. |
| */ |
| if ((flags & OS.SWP_NOSIZE) == 0 && width != 0) { |
| RECT rect = new RECT (); |
| OS.GetWindowRect (handle, rect); |
| if (rect.right - rect.left == 0) { |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| if (start [0] != 0 || end [0] != 0) { |
| OS.SetWindowPos (handle, 0, x, y, width, height, flags); |
| OS.SendMessage (handle, OS.EM_SETSEL, 0, 0); |
| OS.SendMessage (handle, OS.EM_SETSEL, start [0], end [0]); |
| return; |
| } |
| } |
| } |
| super.setBounds (x, y, width, height, flags); |
| } |
| |
| /** |
| * Sets the double click enabled flag. |
| * <p> |
| * The double click flag enables or disables the |
| * default action of the text widget when the user |
| * double clicks. |
| * </p> |
| * |
| * @param doubleClick the new double click flag |
| * |
| * @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 setDoubleClickEnabled (boolean doubleClick) { |
| checkWidget (); |
| this.doubleClick = doubleClick; |
| } |
| |
| /** |
| * Sets the echo character. |
| * <p> |
| * The echo character is the character that is |
| * displayed when the user enters text or the |
| * text is changed by the programmer. Setting |
| * the echo character to '\0' clears the echo |
| * character and redraws the original text. |
| * If for any reason the echo character is invalid, |
| * the default echo character for the platform |
| * is used. |
| * </p> |
| * |
| * @param echo the new echo character |
| * |
| * @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 setEchoChar (char echo) { |
| checkWidget (); |
| if ((style & SWT.MULTI) != 0) return; |
| if (echo != 0) { |
| if ((echo = (char) wcsToMbcs (echo, getCodePage ())) == 0) echo = '*'; |
| } |
| OS.SendMessage (handle, OS.EM_SETPASSWORDCHAR, echo, 0); |
| /* |
| * Bug in Windows. When the password character is changed, |
| * Windows does not redraw to show the new password character. |
| * The fix is to force a redraw when the character is set. |
| */ |
| OS.InvalidateRect (handle, null, true); |
| } |
| |
| /** |
| * Sets the editable state. |
| * |
| * @param editable the new editable state |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setEditable (boolean editable) { |
| checkWidget (); |
| style &= ~SWT.READ_ONLY; |
| if (!editable) style |= SWT.READ_ONLY; |
| OS.SendMessage (handle, OS.EM_SETREADONLY, editable ? 0 : 1, 0); |
| } |
| |
| public void setFont (Font font) { |
| checkWidget (); |
| super.setFont (font); |
| setTabStops (tabs); |
| } |
| |
| /** |
| * Sets the orientation of the receiver, which must be one |
| * of the constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.LEFT_TO_RIGHT</code>. |
| * <p> |
| * |
| * @param orientation new orientation style |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @since 2.1.2 |
| */ |
| public void setOrientation (int orientation) { |
| checkWidget(); |
| if (OS.IsWinCE) return; |
| if ((OS.WIN32_MAJOR << 16 | OS.WIN32_MINOR) < (4 << 16 | 10)) return; |
| int flags = SWT.RIGHT_TO_LEFT | SWT.LEFT_TO_RIGHT; |
| if ((orientation & flags) == 0 || (orientation & flags) == flags) return; |
| style &= ~flags; |
| style |= orientation & flags; |
| int bits = OS.GetWindowLong (handle, OS.GWL_EXSTYLE); |
| if ((style & SWT.RIGHT_TO_LEFT) != 0) { |
| bits |= OS.WS_EX_RTLREADING | OS.WS_EX_LEFTSCROLLBAR; |
| } else { |
| bits &= ~(OS.WS_EX_RTLREADING | OS.WS_EX_LEFTSCROLLBAR); |
| } |
| OS.SetWindowLong (handle, OS.GWL_EXSTYLE, bits); |
| fixAlignment (); |
| } |
| |
| /** |
| * Sets the selection. |
| * <p> |
| * Indexing is zero based. The range of |
| * a selection is from 0..N where N is |
| * the number of characters in the widget. |
| * </p><p> |
| * Text selections are specified in terms of |
| * caret positions. In a text widget that |
| * contains N characters, there are N+1 caret |
| * positions, ranging from 0..N. This differs |
| * from other functions that address character |
| * position such as getText () that use the |
| * regular array indexing rules. |
| * </p> |
| * |
| * @param start new caret position |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setSelection (int start) { |
| checkWidget (); |
| if (OS.IsDBLocale) start = wcsToMbcsPos (start); |
| OS.SendMessage (handle, OS.EM_SETSEL, start, start); |
| OS.SendMessage (handle, OS.EM_SCROLLCARET, 0, 0); |
| } |
| |
| /** |
| * Sets the selection. |
| * <p> |
| * Indexing is zero based. The range of |
| * a selection is from 0..N where N is |
| * the number of characters in the widget. |
| * </p><p> |
| * Text selections are specified in terms of |
| * caret positions. In a text widget that |
| * contains N characters, there are N+1 caret |
| * positions, ranging from 0..N. This differs |
| * from other functions that address character |
| * position such as getText () that use the |
| * usual array indexing rules. |
| * </p> |
| * |
| * @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> |
| */ |
| public void setSelection (int start, int end) { |
| checkWidget (); |
| if (OS.IsDBLocale) { |
| start = wcsToMbcsPos (start); |
| end = wcsToMbcsPos (end); |
| } |
| OS.SendMessage (handle, OS.EM_SETSEL, start, end); |
| OS.SendMessage (handle, OS.EM_SCROLLCARET, 0, 0); |
| } |
| |
| public void setRedraw (boolean redraw) { |
| checkWidget (); |
| super.setRedraw (redraw); |
| /* |
| * Feature in Windows. When WM_SETREDRAW is used to turn |
| * redraw off, the edit control is not scrolled to show the |
| * i-beam. The fix is to detect that the i-beam has moved |
| * while redraw is turned off and force it to be visible |
| * when redraw is restored. |
| */ |
| if (drawCount != 0) return; |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| if (!redraw) { |
| oldStart = start [0]; oldEnd = end [0]; |
| } else { |
| if (oldStart == start [0] && oldEnd == end [0]) return; |
| OS.SendMessage (handle, OS.EM_SCROLLCARET, 0, 0); |
| } |
| } |
| |
| /** |
| * Sets the selection. |
| * <p> |
| * Indexing is zero based. The range of |
| * a selection is from 0..N where N is |
| * the number of characters in the widget. |
| * </p><p> |
| * Text selections are specified in terms of |
| * caret positions. In a text widget that |
| * contains N characters, there are N+1 caret |
| * positions, ranging from 0..N. This differs |
| * from other functions that address character |
| * position such as getText () that use the |
| * usual array indexing rules. |
| * </p> |
| * |
| * @param selection the point |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the point is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setSelection (Point selection) { |
| checkWidget (); |
| if (selection == null) error (SWT.ERROR_NULL_ARGUMENT); |
| setSelection (selection.x, selection.y); |
| } |
| |
| /** |
| * Sets the number of tabs. |
| * <p> |
| * Tab stop spacing is specified in terms of the |
| * space (' ') character. The width of a single |
| * tab stop is the pixel width of the spaces. |
| * </p> |
| * |
| * @param tabs the number of tabs |
| * |
| * </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 setTabs (int tabs) { |
| checkWidget (); |
| if (tabs < 0) return; |
| setTabStops (this.tabs = tabs); |
| } |
| |
| void setTabStops (int tabs) { |
| /* |
| * Feature in Windows. Windows expects the tab spacing in |
| * dialog units so we must convert from space widths. Due |
| * to round off error, the tab spacing may not be the exact |
| * number of space widths, depending on the font. |
| */ |
| int width = (getTabWidth (tabs) * 4) / (OS.GetDialogBaseUnits () & 0xFFFF); |
| OS.SendMessage (handle, OS.EM_SETTABSTOPS, 1, new int [] {width}); |
| } |
| |
| /** |
| * Sets the contents of the receiver to the given string. If the receiver has style |
| * SINGLE and the argument contains multiple lines of text, the result of this |
| * operation is undefined and may vary from platform to platform. |
| * |
| * @param text the new text |
| * |
| * @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 void setText (String string) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| string = Display.withCrLf (string); |
| if (hooks (SWT.Verify) || filters (SWT.Verify)) { |
| int length = OS.GetWindowTextLength (handle); |
| string = verifyText (string, 0, length, null); |
| if (string == null) return; |
| } |
| TCHAR buffer = new TCHAR (getCodePage (), string, true); |
| OS.SetWindowText (handle, buffer); |
| /* |
| * Bug in Windows. When the widget is multi line |
| * text widget, it does not send a WM_COMMAND with |
| * control code EN_CHANGE from SetWindowText () to |
| * notify the application that the text has changed. |
| * The fix is to send the event. |
| */ |
| if ((style & SWT.MULTI) != 0) { |
| sendEvent (SWT.Modify); |
| // widget could be disposed at this point |
| } |
| } |
| |
| /** |
| * Sets the maximum number of characters that the receiver |
| * is capable of holding to be the argument. |
| * <p> |
| * Instead of trying to set the text limit to zero, consider |
| * creating a read-only text widget. |
| * </p><p> |
| * To reset this value to the default, use <code>setTextLimit(Text.LIMIT)</code>. |
| * </p> |
| * |
| * @param limit new text limit |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_CANNOT_BE_ZERO - if the limit is zero</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 setTextLimit (int limit) { |
| checkWidget (); |
| if (limit == 0) error (SWT.ERROR_CANNOT_BE_ZERO); |
| OS.SendMessage (handle, OS.EM_SETLIMITTEXT, limit, 0); |
| } |
| |
| /** |
| * Sets the zero-relative index of the line which is currently |
| * at the top of the receiver. This index can change when lines |
| * are scrolled or new lines 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 (); |
| if ((style & SWT.SINGLE) != 0) return; |
| int count = OS.SendMessage (handle, OS.EM_GETLINECOUNT, 0, 0); |
| index = Math.min (Math.max (index, 0), count - 1); |
| int topIndex = OS.SendMessage (handle, OS.EM_GETFIRSTVISIBLELINE, 0, 0); |
| OS.SendMessage (handle, OS.EM_LINESCROLL, 0, index - topIndex); |
| } |
| |
| /** |
| * Shows the selection. |
| * <p> |
| * If the selection is already showing |
| * in the receiver, this method simply returns. Otherwise, |
| * lines are scrolled until the selection is visible. |
| * </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 showSelection () { |
| checkWidget (); |
| OS.SendMessage (handle, OS.EM_SCROLLCARET, 0, 0); |
| } |
| |
| String verifyText (String string, int start, int end, Event keyEvent) { |
| if (ignoreVerify) return string; |
| Event event = new Event (); |
| event.text = string; |
| event.start = start; |
| event.end = end; |
| if (keyEvent != null) { |
| event.character = keyEvent.character; |
| event.keyCode = keyEvent.keyCode; |
| event.stateMask = keyEvent.stateMask; |
| } |
| if (OS.IsDBLocale) { |
| event.start = mbcsToWcsPos (start); |
| event.end = mbcsToWcsPos (end); |
| } |
| /* |
| * It is possible (but unlikely), that application |
| * code could have disposed the widget in the verify |
| * event. If this happens, answer null to cancel |
| * the operation. |
| */ |
| sendEvent (SWT.Verify, event); |
| if (!event.doit || isDisposed ()) return null; |
| return event.text; |
| } |
| |
| int wcsToMbcsPos (int wcsPos) { |
| if (wcsPos == 0) return 0; |
| if (OS.IsUnicode) return wcsPos; |
| int cp = getCodePage (); |
| int wcsTotal = 0, mbcsTotal = 0; |
| byte [] buffer = new byte [128]; |
| String delimiter = getLineDelimiter (); |
| int delimiterSize = delimiter.length (); |
| int count = OS.SendMessageA (handle, OS.EM_GETLINECOUNT, 0, 0); |
| for (int line=0; line<count; line++) { |
| int wcsSize = 0; |
| int linePos = OS.SendMessageA (handle, OS.EM_LINEINDEX, line, 0); |
| int mbcsSize = OS.SendMessageA (handle, OS.EM_LINELENGTH, linePos, 0); |
| if (mbcsSize != 0) { |
| if (mbcsSize + delimiterSize > buffer.length) { |
| buffer = new byte [mbcsSize + delimiterSize]; |
| } |
| //ENDIAN |
| buffer [0] = (byte) (mbcsSize & 0xFF); |
| buffer [1] = (byte) (mbcsSize >> 8); |
| mbcsSize = OS.SendMessageA (handle, OS.EM_GETLINE, line, buffer); |
| wcsSize = OS.MultiByteToWideChar (cp, OS.MB_PRECOMPOSED, buffer, mbcsSize, null, 0); |
| } |
| if (line - 1 != count) { |
| for (int i=0; i<delimiterSize; i++) { |
| buffer [mbcsSize++] = (byte) delimiter.charAt (i); |
| } |
| wcsSize += delimiterSize; |
| } |
| if ((wcsTotal + wcsSize) >= wcsPos) { |
| wcsSize = 0; |
| int index = 0; |
| while (index < mbcsSize) { |
| if ((wcsTotal + wcsSize) == wcsPos) { |
| return mbcsTotal + index; |
| } |
| if (OS.IsDBCSLeadByte (buffer [index++])) index++; |
| wcsSize++; |
| } |
| return mbcsTotal + mbcsSize; |
| } |
| wcsTotal += wcsSize; |
| mbcsTotal += mbcsSize; |
| } |
| return mbcsTotal; |
| } |
| |
| int widgetStyle () { |
| int bits = super.widgetStyle (); |
| if ((style & SWT.PASSWORD) != 0) bits |= OS.ES_PASSWORD; |
| if ((style & SWT.CENTER) != 0) bits |= OS.ES_CENTER; |
| if ((style & SWT.READ_ONLY) != 0) bits |= OS.ES_READONLY; |
| if ((style & SWT.SINGLE) != 0) return bits | OS.ES_AUTOHSCROLL; |
| bits |= OS.ES_MULTILINE | OS.ES_AUTOHSCROLL | OS.ES_NOHIDESEL; |
| if ((style & SWT.WRAP) != 0) bits &= ~(OS.WS_HSCROLL | OS.ES_AUTOHSCROLL); |
| return bits; |
| } |
| |
| TCHAR windowClass () { |
| return EditClass; |
| } |
| |
| int windowProc () { |
| return EditProc; |
| } |
| |
| LRESULT WM_CHAR (int wParam, int lParam) { |
| if (ignoreCharacter) return null; |
| LRESULT result = super.WM_CHAR (wParam, lParam); |
| if (result != null) return result; |
| /* |
| * Feature in Windows. For some reason, when the |
| * widget is a single line text widget, when the |
| * user presses tab, return or escape, Windows beeps. |
| * The fix is to look for these keys and not call |
| * the window proc. |
| */ |
| if ((style & SWT.SINGLE) != 0) { |
| switch (wParam) { |
| case OS.VK_RETURN: |
| postEvent (SWT.DefaultSelection); |
| // FALL THROUGH |
| case OS.VK_TAB: |
| case OS.VK_ESCAPE: return LRESULT.ZERO; |
| } |
| } |
| return result; |
| } |
| |
| LRESULT WM_CLEAR (int wParam, int lParam) { |
| LRESULT result = super.WM_CLEAR (wParam, lParam); |
| if (result != null) return result; |
| if (!hooks (SWT.Verify) && !filters (SWT.Verify)) return result; |
| if ((style & SWT.READ_ONLY) != 0) return result; |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| if (start [0] == end [0]) return result; |
| String newText = verifyText ("", start [0], end [0], null); |
| if (newText == null) return LRESULT.ZERO; |
| if (newText.length () != 0) { |
| result = new LRESULT (callWindowProc (OS.WM_CLEAR, 0, 0)); |
| newText = Display.withCrLf (newText); |
| TCHAR buffer = new TCHAR (getCodePage (), newText, true); |
| /* |
| * Feature in Windows. When an edit control with ES_MULTILINE |
| * style that does not have the WS_VSCROLL style is full (i.e. |
| * there is no space at the end to draw any more characters), |
| * EM_REPLACESEL sends a WM_CHAR with a backspace character |
| * to remove any further text that is added. This is an |
| * implementation detail of the edit control that is unexpected |
| * and can cause endless recursion when EM_REPLACESEL is sent |
| * from a WM_CHAR handler. The fix is to ignore calling the |
| * handler from WM_CHAR. |
| */ |
| ignoreCharacter = true; |
| OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); |
| ignoreCharacter = false; |
| } |
| return result; |
| } |
| |
| LRESULT WM_CUT (int wParam, int lParam) { |
| LRESULT result = super.WM_CUT (wParam, lParam); |
| if (result != null) return result; |
| if (!hooks (SWT.Verify) && !filters (SWT.Verify)) return result; |
| if ((style & SWT.READ_ONLY) != 0) return result; |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| if (start [0] == end [0]) return result; |
| String newText = verifyText ("", start [0], end [0], null); |
| if (newText == null) return LRESULT.ZERO; |
| if (newText.length () != 0) { |
| result = new LRESULT (callWindowProc (OS.WM_CUT, 0, 0)); |
| newText = Display.withCrLf (newText); |
| TCHAR buffer = new TCHAR (getCodePage (), newText, true); |
| /* |
| * Feature in Windows. When an edit control with ES_MULTILINE |
| * style that does not have the WS_VSCROLL style is full (i.e. |
| * there is no space at the end to draw any more characters), |
| * EM_REPLACESEL sends a WM_CHAR with a backspace character |
| * to remove any further text that is added. This is an |
| * implementation detail of the edit control that is unexpected |
| * and can cause endless recursion when EM_REPLACESEL is sent |
| * from a WM_CHAR handler. The fix is to ignore calling the |
| * handler from WM_CHAR. |
| */ |
| ignoreCharacter = true; |
| OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); |
| ignoreCharacter = false; |
| } |
| return result; |
| } |
| |
| LRESULT WM_GETDLGCODE (int wParam, int lParam) { |
| LRESULT result = super.WM_GETDLGCODE (wParam, lParam); |
| if (result != null) return result; |
| |
| /* |
| * Bug in WinCE PPC. For some reason, sending WM_GETDLGCODE |
| * to a multi-line edit control causes it to ignore return and |
| * tab keys. The fix is to return the value which is normally |
| * returned by the text window proc on other versions of Windows. |
| */ |
| if (OS.IsPPC) { |
| if ((style & SWT.MULTI) != 0 && (style & SWT.READ_ONLY) == 0 && lParam == 0) { |
| return new LRESULT (OS.DLGC_HASSETSEL | OS.DLGC_WANTALLKEYS | OS.DLGC_WANTCHARS); |
| } |
| } |
| |
| /* |
| * Feature in Windows. Despite the fact that the |
| * edit control is read only, it still returns a |
| * dialog code indicating that it wants keys. The |
| * fix is to detect this case and clear the bits. |
| */ |
| if ((style & SWT.READ_ONLY) != 0) { |
| int code = callWindowProc (OS.WM_GETDLGCODE, wParam, lParam); |
| code &= ~(OS.DLGC_WANTALLKEYS | OS.DLGC_WANTTAB | OS.DLGC_WANTARROWS); |
| return new LRESULT (code); |
| } |
| return null; |
| } |
| |
| LRESULT WM_IME_CHAR (int wParam, int lParam) { |
| |
| /* Process a DBCS character */ |
| Display display = this.display; |
| display.lastKey = 0; |
| display.lastAscii = wParam; |
| display.lastVirtual = display.lastNull = false; |
| if (!sendKeyEvent (SWT.KeyDown, OS.WM_IME_CHAR, wParam, lParam)) { |
| return LRESULT.ZERO; |
| } |
| |
| /* |
| * Feature in Windows. The Windows text widget uses |
| * two 2 WM_CHAR's to process a DBCS key instead of |
| * using WM_IME_CHAR. The fix is to allow the text |
| * widget to get the WM_CHAR's but ignore sending |
| * them to the application. |
| */ |
| ignoreCharacter = true; |
| int result = callWindowProc (OS.WM_IME_CHAR, wParam, lParam); |
| MSG msg = new MSG (); |
| while (OS.PeekMessage (msg, handle, OS.WM_CHAR, OS.WM_CHAR, OS.PM_REMOVE)) { |
| OS.TranslateMessage (msg); |
| OS.DispatchMessage (msg); |
| } |
| ignoreCharacter = false; |
| |
| sendKeyEvent (SWT.KeyUp, OS.WM_IME_CHAR, wParam, lParam); |
| // widget could be disposed at this point |
| display.lastKey = display.lastAscii = 0; |
| return new LRESULT (result); |
| } |
| |
| LRESULT WM_LBUTTONDBLCLK (int wParam, int lParam) { |
| /* |
| * Prevent Windows from processing WM_LBUTTONDBLCLK |
| * when double clicking behavior is disabled by not |
| * calling the window proc. |
| */ |
| sendMouseEvent (SWT.MouseDown, 1, OS.WM_LBUTTONDOWN, wParam, lParam); |
| sendMouseEvent (SWT.MouseDoubleClick, 1, OS.WM_LBUTTONDBLCLK, wParam, lParam); |
| if (OS.GetCapture () != handle) OS.SetCapture (handle); |
| if (!doubleClick) return LRESULT.ZERO; |
| |
| /* |
| * Bug in Windows. When the last line of text in the |
| * widget is double clicked and the line is empty, Windows |
| * hides the i-beam then moves it to the first line in |
| * the widget but does not scroll to show the user. |
| * If the user types without clicking the mouse, invalid |
| * characters are displayed at the end of each line of |
| * text in the widget. The fix is to detect this case |
| * and avoid calling the window proc. |
| */ |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| if (start [0] == end [0]) { |
| int length = OS.GetWindowTextLength (handle); |
| if (length == start [0]) { |
| int result = OS.SendMessage (handle, OS.EM_LINELENGTH, length, 0); |
| if (result == 0) return LRESULT.ZERO; |
| } |
| } |
| return null; |
| } |
| |
| LRESULT WM_PASTE (int wParam, int lParam) { |
| LRESULT result = super.WM_PASTE (wParam, lParam); |
| if (result != null) return result; |
| if (!hooks (SWT.Verify) && !filters (SWT.Verify)) return result; |
| if ((style & SWT.READ_ONLY) != 0) return result; |
| String oldText = getClipboardText (); |
| if (oldText == null) return result; |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| String newText = verifyText (oldText, start [0], end [0], null); |
| if (newText == null) return LRESULT.ZERO; |
| if (newText != oldText) { |
| newText = Display.withCrLf (newText); |
| TCHAR buffer = new TCHAR (getCodePage (), newText, true); |
| /* |
| * Feature in Windows. When an edit control with ES_MULTILINE |
| * style that does not have the WS_VSCROLL style is full (i.e. |
| * there is no space at the end to draw any more characters), |
| * EM_REPLACESEL sends a WM_CHAR with a backspace character |
| * to remove any further text that is added. This is an |
| * implementation detail of the edit control that is unexpected |
| * and can cause endless recursion when EM_REPLACESEL is sent |
| * from a WM_CHAR handler. The fix is to ignore calling the |
| * handler from WM_CHAR. |
| */ |
| ignoreCharacter = true; |
| OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); |
| ignoreCharacter = false; |
| return LRESULT.ZERO; |
| } |
| return result; |
| } |
| |
| LRESULT WM_UNDO (int wParam, int lParam) { |
| LRESULT result = super.WM_UNDO (wParam, lParam); |
| if (result != null) return result; |
| if (!hooks (SWT.Verify) && !filters (SWT.Verify)) { |
| return result; |
| } |
| |
| /* Undo and then Redo to get the Undo text */ |
| if (OS.SendMessage (handle, OS.EM_CANUNDO, 0, 0) == 0) { |
| return result; |
| } |
| ignoreVerify = true; |
| callWindowProc (OS.WM_UNDO, wParam, lParam); |
| String oldText = getSelectionText (); |
| callWindowProc (OS.WM_UNDO, wParam, lParam); |
| ignoreVerify = false; |
| |
| /* Verify the Undo operation */ |
| int [] start = new int [1], end = new int [1]; |
| OS.SendMessage (handle, OS.EM_GETSEL, start, end); |
| String newText = verifyText (oldText, start [0], end [0], null); |
| if (newText == null) return LRESULT.ZERO; |
| if (newText != oldText) { |
| newText = Display.withCrLf (newText); |
| TCHAR buffer = new TCHAR (getCodePage (), newText, true); |
| /* |
| * Feature in Windows. When an edit control with ES_MULTILINE |
| * style that does not have the WS_VSCROLL style is full (i.e. |
| * there is no space at the end to draw any more characters), |
| * EM_REPLACESEL sends a WM_CHAR with a backspace character |
| * to remove any further text that is added. This is an |
| * implementation detail of the edit control that is unexpected |
| * and can cause endless recursion when EM_REPLACESEL is sent |
| * from a WM_CHAR handler. The fix is to ignore calling the |
| * handler from WM_CHAR. |
| */ |
| ignoreCharacter = true; |
| OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); |
| ignoreCharacter = false; |
| return LRESULT.ZERO; |
| } |
| |
| /* Do the original Undo */ |
| ignoreVerify = true; |
| callWindowProc (OS.WM_UNDO, wParam, lParam); |
| ignoreVerify = false; |
| return LRESULT.ONE; |
| } |
| |
| LRESULT wmCommandChild (int wParam, int lParam) { |
| int code = wParam >> 16; |
| switch (code) { |
| case OS.EN_CHANGE: |
| /* |
| * It is possible (but unlikely), that application |
| * code could have disposed the widget in the modify |
| * event. If this happens, end the processing of the |
| * Windows message by returning zero as the result of |
| * the window proc. |
| */ |
| sendEvent (SWT.Modify); |
| if (isDisposed ()) return LRESULT.ZERO; |
| break; |
| case OS.EN_ALIGN_LTR_EC: |
| style &= ~SWT.RIGHT_TO_LEFT; |
| style |= SWT.LEFT_TO_RIGHT; |
| fixAlignment (); |
| break; |
| case OS.EN_ALIGN_RTL_EC: |
| style &= ~SWT.LEFT_TO_RIGHT; |
| style |= SWT.RIGHT_TO_LEFT; |
| fixAlignment (); |
| break; |
| } |
| return super.wmCommandChild (wParam, lParam); |
| } |
| |
| } |