/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.photon.*;
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.
* Text controls can be either single or multi-line.
* When a text control is created with a border, the
* operating system includes a platform specific inset
* around the contents of the control. When created
* without a border, an effort is made to remove the
* inset such that the preferred size of the control
* is the same size as the contents.
* <p>
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>CENTER, ICON_CANCEL, ICON_SEARCH, LEFT, MULTI, PASSWORD, SEARCH, SINGLE, RIGHT, READ_ONLY, WRAP</dd>
* <dt><b>Events:</b></dt>
* <dd>DefaultSelection, Modify, Verify, OrientationChange</dd>
* </dl>
* <p>
* Note: Only one of the styles MULTI and SINGLE may be specified,
* and only one of the styles LEFT, CENTER, and RIGHT may be specified.
* </p>
* <p>
* Note: The styles ICON_CANCEL and ICON_SEARCH are hints used in combination with SEARCH.
* When the platform supports the hint, the text control shows these icons. When an icon
* is selected, a default selection event is sent with the detail field set to one of
* ICON_CANCEL or ICON_SEARCH. Normally, application code does not need to check the
* detail. In the case of ICON_CANCEL, the text is cleared before the default selection
* event is sent causing the application to search for an empty string.
* </p>
* <p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#text">Text snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Text extends Scrollable {
char echoCharacter;
boolean ignoreChange;
String hiddenText, message;
int tabs, lastModifiedText;
PtTextCallback_t textVerify;
/**
* The maximum number of characters that can be entered
* into a text widget.
* <p>
* Note that this value is platform dependent, based upon
* the native widget implementation.
* </p>
*/
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;
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 = 0x7FFFFFFF;
DELIMITER = "\n";
}
/**
* 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 SWT#LEFT
* @see SWT#RIGHT
* @see SWT#CENTER
* @see SWT#PASSWORD
* @see SWT#SEARCH
* @see SWT#ICON_SEARCH
* @see SWT#ICON_CANCEL
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Text (Composite parent, int style) {
super (parent, checkStyle (style));
}
static int checkStyle (int style) {
if ((style & SWT.SEARCH) != 0) {
style |= SWT.SINGLE | SWT.BORDER;
style &= ~SWT.PASSWORD;
}
style &= ~SWT.SEARCH;
if ((style & SWT.SINGLE) != 0 && (style & SWT.MULTI) != 0) {
style &= ~SWT.MULTI;
}
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;
style &= ~SWT.H_SCROLL;
}
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;
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget();
int [] args = new int [] {OS.Pt_ARG_WIDTH, 0, 0, OS.Pt_ARG_HEIGHT, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
boolean wrap = (style & SWT.WRAP) != 0;
if (wrap) {
if (wHint == SWT.DEFAULT) {
OS.PtSetResource (handle, OS.Pt_ARG_MULTITEXT_WRAP_FLAGS, OS.Pt_EMT_NEWLINE, ~0);
} else {
OS.PtSetResource (handle, OS.Pt_ARG_WIDTH, wHint, 0);
}
}
int resizeFlags = OS.Pt_RESIZE_X_ALWAYS | OS.Pt_RESIZE_Y_ALWAYS;
OS.PtSetResource (handle, OS.Pt_ARG_RESIZE_FLAGS, resizeFlags, OS.Pt_RESIZE_XY_BITS);
if ((style & SWT.MULTI) != 0 || !OS.PtWidgetIsRealized (handle)) OS.PtExtentWidgetFamily (handle);
PhDim_t dim = new PhDim_t ();
OS.PtWidgetPreferredSize (handle, dim);
int width = dim.w, height = dim.h;
OS.PtSetResource (handle, OS.Pt_ARG_RESIZE_FLAGS, 0, OS.Pt_RESIZE_XY_BITS);
if (wrap) {
if (wHint == SWT.DEFAULT) {
int wrapFlags = OS.Pt_EMT_WORD | OS.Pt_EMT_CHAR | OS.Pt_EMT_NEWLINE;
OS.PtSetResource (handle, OS.Pt_ARG_MULTITEXT_WRAP_FLAGS, wrapFlags, ~0);
}
}
OS.PtSetResources (handle, args.length / 3, args);
ScrollBar scroll;
int scrollWidth = (scroll = getVerticalBar ()) != null ? scroll.getSize ().x : 0;
int scrollHeight = (scroll = getHorizontalBar ()) != null ? scroll.getSize ().y : 0;
width += scrollWidth;
if (!wrap) height += scrollHeight;
if (wHint != SWT.DEFAULT || hHint != SWT.DEFAULT) {
PhRect_t rect = new PhRect_t ();
PhArea_t area = new PhArea_t ();
rect.lr_x = (short) (wHint - 1);
rect.lr_y = (short) (hHint - 1);
OS.PtSetAreaFromWidgetCanvas (handle, rect, area);
if (wHint != SWT.DEFAULT) width = area.size_w + scrollWidth;
if (hHint != SWT.DEFAULT) height = area.size_h + scrollHeight;
}
return new Point(width, height);
}
/**
* 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();
int [] position = {0};
if ((style & SWT.SINGLE) != 0) {
int [] args = {OS.Pt_ARG_CURSOR_POSITION, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
position [0] = args [1];
}
OS.PtTextSetSelection (handle, position, position);
}
void createHandle (int index) {
state |= HANDLE;
int parentHandle = parent.parentingHandle ();
boolean hasBorder = (style & SWT.BORDER) != 0;
int textFlags = (style & SWT.READ_ONLY) != 0 ? 0 : OS.Pt_EDITABLE;
if ((style & SWT.SINGLE) != 0) {
int clazz = display.PtText;
int [] args = {
OS.Pt_ARG_FLAGS, hasBorder ? OS.Pt_HIGHLIGHTED : 0, OS.Pt_HIGHLIGHTED,
OS.Pt_ARG_FLAGS, OS.Pt_CALLBACKS_ACTIVE, OS.Pt_CALLBACKS_ACTIVE,
OS.Pt_ARG_TEXT_FLAGS, textFlags, OS.Pt_EDITABLE,
OS.Pt_ARG_RESIZE_FLAGS, 0, OS.Pt_RESIZE_XY_BITS,
};
handle = OS.PtCreateWidget (clazz, parentHandle, args.length / 3, args);
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
return;
}
int clazz = display.PtMultiText;
int wrapFlags = (style & SWT.WRAP) != 0 ? OS.Pt_EMT_WORD | OS.Pt_EMT_CHAR : 0;
int [] args = {
OS.Pt_ARG_FLAGS, hasBorder ? OS.Pt_HIGHLIGHTED : 0, OS.Pt_HIGHLIGHTED,
OS.Pt_ARG_FLAGS, OS.Pt_CALLBACKS_ACTIVE, OS.Pt_CALLBACKS_ACTIVE,
OS.Pt_ARG_TEXT_FLAGS, textFlags, OS.Pt_EDITABLE,
OS.Pt_ARG_MULTITEXT_WRAP_FLAGS, wrapFlags, OS.Pt_EMT_WORD | OS.Pt_EMT_CHAR,
OS.Pt_ARG_SCROLLBAR_X_DISPLAY, (style & SWT.H_SCROLL) != 0 ? OS.Pt_ALWAYS : OS.Pt_NEVER, 0,
OS.Pt_ARG_SCROLLBAR_Y_DISPLAY, (style & SWT.V_SCROLL) != 0 ? OS.Pt_ALWAYS : OS.Pt_NEVER, 0,
OS.Pt_ARG_RESIZE_FLAGS, 0, OS.Pt_RESIZE_XY_BITS,
};
handle = OS.PtCreateWidget (clazz, parentHandle, args.length / 3, args);
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
createStandardScrollBars ();
}
void createWidget (int index) {
super.createWidget (index);
// doubleClick = true;
setTabStops (tabs = 8);
hiddenText = message = "";
if ((style & SWT.PASSWORD) != 0) setEchoChar (PASSWORD);
}
/**
* 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 the user, 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,
* or when ENTER is pressed in a search text. If the receiver has the <code>SWT.SEARCH | SWT.CANCEL</code> style
* and the user cancels the search, the event object detail field contains the value <code>SWT.CANCEL</code>.
* </p>
*
* @param listener the listener which should be notified when the control is selected by the user
*
* @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);
byte [] buffer = Converter.wcsToMbcs (null, string, false);
OS.PtTextModifyText (handle, 0, 0, -1, buffer, buffer.length);
}
/**
* 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();
int [] start = new int [1], end = new int [1];
int length = OS.PtTextGetSelection (handle, start, end);
if (length <= 0) return;
int [] args = {OS.Pt_ARG_TEXT_STRING, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
byte[] buffer = new byte[length + 1];
OS.memmove (buffer, args [1] + start [0], length);
int ig = OS.PhInputGroup (0);
OS.PhClipboardCopyString((short)ig, buffer);
}
/**
* 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();
int [] start = new int [1], end = new int [1];
int length = OS.PtTextGetSelection (handle, start, end);
if (length <= 0) return;
int [] args = {OS.Pt_ARG_TEXT_STRING, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
byte[] buffer = new byte[length + 1];
OS.memmove (buffer, args [1] + start [0], length);
int ig = OS.PhInputGroup (0);
OS.PhClipboardCopyString((short)ig, buffer);
buffer = new byte[0];
OS.PtTextModifyText (handle, start [0], end [0], start [0], buffer, buffer.length);
}
void deregister () {
super.deregister ();
/*
* Bug in Photon. Even though the Pt_CB_GOT_FOCUS callback
* is added to the multi-line text, the widget parameter
* in the callback is a child of the multi-line text. The fix
* is to register that child so that the lookup in the widget
* table will find the muti-line text.
*/
if ((style & SWT.MULTI) == 0) return;
int child = OS.PtWidgetChildBack (handle);
WidgetTable.remove (child);
}
int defaultBackground () {
return display.TEXT_BACKGROUND;
}
int defaultForeground () {
return display.TEXT_FOREGROUND;
}
/**
* Returns 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();
//NOT DONE - NOT NEEDED
return 0;
}
/**
* Returns a point describing the receiver's location relative
* to its parent (or its display if its parent is null).
* <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();
//NOT DONE - NOT NEEDED
return null;
}
/**
* Returns the character position of the caret.
* <p>
* Indexing is zero based.
* </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 [] args = {OS.Pt_ARG_CURSOR_POSITION, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
return args [1];
}
/**
* Returns 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 [] args = {OS.Pt_ARG_TEXT_STRING, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
if (args [1] == 0) return 0;
return OS.strlen (args [1]);
}
/**
* Returns 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>
*
* @return whether or not double click is enabled
*
* @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();
//NOT DONE - NOT NEEDED
return false;
}
/**
* Returns 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>
*
* @return the 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>
*
* @see #setEchoChar
*/
public char getEchoChar () {
checkWidget();
return echoCharacter;
}
/**
* Returns the editable state.
*
* @return whether or not the receiver is editable
*
* @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 [] args = {OS.Pt_ARG_TEXT_FLAGS, 0, 0};
OS.PtGetResources(handle, args.length / 3, args);
return (args [1] & OS.Pt_EDITABLE) != 0;
}
/**
* Returns 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();
if ((style & SWT.SINGLE) != 0) return 1;
int [] args = {OS.Pt_ARG_MULTITEXT_NUM_LINES, 0, 0};
OS.PtGetResources(handle, args.length / 3, args);
return args [1];
}
/**
* Returns 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>
*
* @see #DELIMITER
*/
public String getLineDelimiter () {
checkWidget();
return "\n";
}
/**
* Returns 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();
if ((style & SWT.SINGLE) != 0) {
PhDim_t dim = new PhDim_t ();
if (!OS.PtWidgetIsRealized (handle)) OS.PtExtentWidget (handle);
OS.PtWidgetPreferredSize (handle, dim);
PhRect_t extent = new PhRect_t ();
OS.PtWidgetExtent(handle, extent);
PhRect_t canvas = new PhRect_t ();
OS.PtWidgetCanvas (handle, canvas);
int topBorder = canvas.ul_y - extent.ul_y;
int bottomBorder = extent.lr_y - canvas.lr_y;
return dim.h - topBorder - bottomBorder;
}
int ptr = OS.malloc (20);
int [] args = {
OS.Pt_ARG_MULTITEXT_QUERY_LINE, ptr, 1,
OS.Pt_ARG_MULTITEXT_LINE_SPACING, 0, 0
};
OS.PtGetResources (handle, args.length / 3, args);
int [] line = new int [1];
OS.memmove (line, args [1] + 8, 4);
PhRect_t extent = new PhRect_t ();
OS.memmove (extent, line [0] + 10, 8);
OS.free(ptr);
return extent.lr_y - extent.ul_y + 1 + args [4];
}
/**
* Returns the widget message. The message text is displayed
* as a hint for the user, indicating the purpose of the field.
* <p>
* Typically this is used in conjunction with <code>SWT.SEARCH</code>.
* </p>
*
* @return the widget message
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.3
*/
public String getMessage () {
checkWidget ();
return message;
}
String getNameText () {
if ((style & SWT.SINGLE) != 0) return getText ();
return getText (0, Math.min(getCharCount () - 1, 10));
}
/**
* Returns the orientation of the receiver, which will be one of the
* constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>.
*
* @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);
}
/**
* Returns a <code>Point</code> whose x coordinate is the
* character position representing the start of the selected
* text, and whose y coordinate is the character position
* representing the end of the selection. An "empty" selection
* is indicated by the x and y coordinates having the same value.
* <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 a point representing the selection start and end
*
* @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();
if (textVerify != null) {
return new Point (textVerify.start_pos, textVerify.end_pos);
}
int [] start = new int [1], end = new int [1];
OS.PtTextGetSelection (handle, start, end);
if (start [0] == -1) {
int [] args = {OS.Pt_ARG_CURSOR_POSITION, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
start [0] = end [0] = args [1];
}
return new Point (start [0], end [0]);
}
/**
* Returns 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, or an empty string if there is no current selection.
*
* @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);
}
/**
* Returns 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 [] args = new int [] {OS.Pt_ARG_TEXT_FONT, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
PhRect_t rect = new PhRect_t ();
int ptr = OS.malloc (1);
OS.memmove (ptr, new byte [] {' '}, 1);
OS.PfExtentText(rect, null, args [1], ptr, 1);
OS.free (ptr);
int width = rect.lr_x - rect.ul_x + 1;
return width * tabs;
}
/**
* Returns a range of text. Returns an empty string if the
* start of the range is greater than the end.
* <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 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 ();
if (!(start <= end && 0 <= end)) return "";
String text = getText ();
int length = text.length ();
end = Math.min (end, length - 1);
if (start > end) return "";
start = Math.max (0, start);
/*
* NOTE: The current implementation uses substring ()
* which can reference a potentially large character
* array.
*/
//NOT DONE - use OS in SINGLE text
return text.substring (start, end + 1);
}
/**
* Returns the widget's text as a character array.
* <p>
* The text for a text widget is the characters in the widget, or
* a zero-length array if this has never been set.
* </p>
*
* @return a character array that contains the widget's 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>
*
* @see #setTextChars(char[])
*
* @since 3.7
*/
public char [] getTextChars () {
checkWidget();
return new char [0];
}
/**
* Returns the widget text.
* <p>
* The text for a text widget is the characters in the widget, or
* an empty string if this has never been set.
* </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();
if (echoCharacter != '\0') return hiddenText;
int [] args = {OS.Pt_ARG_TEXT_STRING, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
if (args [1] == 0) return "";
int length = OS.strlen (args [1]);
byte [] buffer = new byte [length];
OS.memmove (buffer, args [1], length);
char [] unicode = Converter.mbcsToWcs (null, buffer);
return new String (unicode);
}
/**
* 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>
*
* @see #LIMIT
*/
public int getTextLimit () {
checkWidget();
int [] args = new int [] {OS.Pt_ARG_MAX_LENGTH, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
return args [1];
}
/**
* 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;
int [] args = {OS.Pt_ARG_MULTITEXT_TOP_LINE, 0, 0};
OS.PtGetResources(handle, args.length / 3, args);
return args [1] - 1;
}
/**
* Returns 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();
//NOT DONE - NOT NEEDED
return 0;
}
void hookEvents () {
super.hookEvents ();
int windowProc = display.windowProc;
OS.PtAddCallback (handle, OS.Pt_CB_MODIFY_VERIFY, windowProc, OS.Pt_CB_MODIFY_VERIFY);
OS.PtAddCallback (handle, OS.Pt_CB_TEXT_CHANGED, windowProc, OS.Pt_CB_TEXT_CHANGED);
}
/**
* Inserts a string.
* <p>
* The old selection is replaced with the new text.
* </p>
*
* @param string the string
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is <code>null</code></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 insert (String string) {
checkWidget();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
byte [] buffer = Converter.wcsToMbcs (null, string, false);
int [] start = new int [1], end = new int [1];
OS.PtTextGetSelection (handle, start, end);
if (start [0] == -1) {
int [] args = {OS.Pt_ARG_CURSOR_POSITION, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
start [0] = end [0] = args [1];
}
OS.PtTextModifyText (handle, start [0], end [0], start [0], buffer, buffer.length);
}
/**
* 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();
int ig = OS.PhInputGroup (0);
int ptr = OS.PhClipboardPasteString((short)ig);
if (ptr == 0) return;
int length = OS.strlen (ptr);
int [] start = new int [1], end = new int [1];
OS.PtTextGetSelection (handle, start, end);
if (start [0] == -1) {
int [] args = {OS.Pt_ARG_CURSOR_POSITION, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
start [0] = end [0] = args [1];
}
OS.PtTextModifyText (handle, start [0], end [0], end [0], ptr, length);
OS.free(ptr);
}
int Ph_EV_BOUNDARY (int widget, int info) {
/*
* Bug in Photon. PtMultiText reports boundary events for
* the internal (hidden) child widget. This makes it appear as
* though the pointer leaves as soon as it enters the widget
* area. The fix is to filter out these theser events.
*/
if ((style & SWT.MULTI) != 0) {
if (info == 0) return OS.Pt_END;
PtCallbackInfo_t cbinfo = new PtCallbackInfo_t ();
OS.memmove (cbinfo, info, PtCallbackInfo_t.sizeof);
if (cbinfo.event == 0) return OS.Pt_END;
PhEvent_t ev = new PhEvent_t ();
OS.memmove (ev, cbinfo.event, PhEvent_t.sizeof);
switch ((int) ev.subtype) {
case OS.Ph_EV_PTR_ENTER_FROM_CHILD:
case OS.Ph_EV_PTR_LEAVE_TO_CHILD:
return OS.Pt_CONTINUE;
}
}
return super.Ph_EV_BOUNDARY (widget, info);
}
int Pt_CB_GOT_FOCUS (int widget, int info) {
/*
* Bug in Photon. Even though the Pt_CB_GOT_FOCUS callback
* is added to the multi-line text, the widget parameter
* in the callback is a child of the multi-line text. The fix
* is to register that child so that the lookup in the widget
* table will find the muti-line text and avoid multiple
* Pt_CB_LOST_FOCUS callbacks.
*/
if ((style & SWT.MULTI) != 0) {
if (widget != handle) return OS.Pt_CONTINUE;
}
return super.Pt_CB_GOT_FOCUS (widget, info);
}
int Pt_CB_MODIFY_VERIFY (int widget, int info) {
if (lastModifiedText != 0) {
OS.free (lastModifiedText);
lastModifiedText = 0;
}
if (echoCharacter == '\0' && !hooks (SWT.Verify) && !filters (SWT.Verify)) return 0;
PtCallbackInfo_t cbinfo = new PtCallbackInfo_t ();
OS.memmove (cbinfo, info, PtCallbackInfo_t.sizeof);
PtTextCallback_t textVerify = new PtTextCallback_t ();
OS.memmove (textVerify, cbinfo.cbdata, PtTextCallback_t.sizeof);
byte [] buffer = new byte [textVerify.length];
OS.memmove (buffer, textVerify.text, buffer.length);
String text = new String (Converter.mbcsToWcs (null, buffer));
String newText = text;
if (!ignoreChange) {
Event event = new Event ();
event.start = textVerify.start_pos;
event.end = textVerify.end_pos;
event.doit = textVerify.doit != 0;
event.text = text;
if (cbinfo.event != 0) {
int data = OS.PhGetData (cbinfo.event);
if (data != 0) {
PhKeyEvent_t ke = new PhKeyEvent_t ();
OS.memmove (ke, data, PhKeyEvent_t.sizeof);
if ((ke.key_flags & (OS.Pk_KF_Key_Down | OS.Pk_KF_Key_Repeat)) != 0) {
setKeyState (event, SWT.Verify, ke);
}
}
}
sendEvent (SWT.Verify, event);
newText = event.text;
textVerify.doit = (event.doit && newText != null) ? 1 : 0;
}
if (newText != null) {
if (echoCharacter != '\0' && (textVerify.doit != 0)) {
String prefix = hiddenText.substring (0, textVerify.start_pos);
String suffix = hiddenText.substring (textVerify.end_pos, hiddenText.length ());
hiddenText = prefix + newText + suffix;
char [] charBuffer = new char [newText.length ()];
for (int i=0; i<charBuffer.length; i++) {
charBuffer [i] = echoCharacter;
}
newText = new String (charBuffer);
}
if (newText != text) {
byte [] buffer2 = Converter.wcsToMbcs (null, newText, true);
int length = buffer2.length - 1;
if (length == textVerify.length) {
OS.memmove(textVerify.text, buffer2, length);
} else {
int ptr = OS.malloc (length);
OS.memmove (ptr, buffer2, length);
textVerify.new_insert += length - textVerify.length;
textVerify.text = ptr;
textVerify.length = length;
lastModifiedText = ptr;
}
}
}
OS.memmove (cbinfo.cbdata, textVerify, PtTextCallback_t.sizeof);
textVerify = null;
return OS.Pt_CONTINUE;
}
int Pt_CB_TEXT_CHANGED (int widget, int info) {
if (lastModifiedText != 0) {
OS.free (lastModifiedText);
lastModifiedText = 0;
}
if (!ignoreChange) sendEvent (SWT.Modify);
return OS.Pt_CONTINUE;
}
void register () {
super.register ();
/*
* Bug in Photon. Even though the Pt_CB_GOT_FOCUS callback
* is added to the multi-line text, the widget parameter
* in the callback is a child of the multi-line text. The fix
* is to register that child so that the lookup in the widget
* table will find the muti-line text.
*/
if ((style & SWT.MULTI) == 0) return;
int child = OS.PtWidgetChildBack (handle);
WidgetTable.put (child, this);
}
void releaseWidget () {
super.releaseWidget ();
if (lastModifiedText != 0) OS.free (lastModifiedText);
lastModifiedText = 0;
hiddenText = message = null;
textVerify = null;
}
/**
* 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 by the user.
*
* @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);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is verified.
*
* @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 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.PtTextSetSelection (handle, new int [] {0}, new int [] {0x7FFFFFFF});
}
/**
* 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,
* or if the platform does not allow modification
* of the echo character, 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 (echoCharacter == echo) return;
String newText;
if (echo == 0) {
newText = hiddenText;
hiddenText = "";
} else {
newText = hiddenText = getText();
}
echoCharacter = echo;
Point selection = getSelection();
boolean oldValue = ignoreChange;
ignoreChange = true;
setText(newText);
setSelection(selection.x, selection.y);
ignoreChange = oldValue;
}
/**
* 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><p>
* Note: This operation is a hint and is not supported on
* platforms that do not have this concept.
* </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();
//NOT DONE - NOT NEEDED
}
/**
* 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;
int flags = editable ? OS.Pt_EDITABLE : 0;
OS.PtSetResource (handle, OS.Pt_ARG_TEXT_FLAGS, flags, OS.Pt_EDITABLE);
}
public void setFont (Font font) {
super.setFont (font);
setTabStops (tabs);
}
/**
* Sets the widget message. The message text is displayed
* as a hint for the user, indicating the purpose of the field.
* <p>
* Typically this is used in conjunction with <code>SWT.SEARCH</code>.
* </p>
*
* @param message the new message
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the message is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.3
*/
public void setMessage (String message) {
checkWidget ();
if (message == null) error (SWT.ERROR_NULL_ARGUMENT);
this.message = message;
}
/**
* Sets the orientation of the receiver, which must be one
* of the constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>.
* <p>
* Note: This operation is a hint and is not supported on
* platforms that do not have this concept.
* </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();
}
/**
* 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 position) {
checkWidget();
OS.PtSetResource (handle, OS.Pt_ARG_CURSOR_POSITION, position, 0);
/*
* Feature in Photon. On a single-line text, the selection is
* not cleared when setting the cursor position. The fix is to
* set the selection start and end values to the specified
* position.
*/
if ((style & SWT.SINGLE) != 0) {
int [] selection = {position};
OS.PtTextSetSelection (handle, selection, selection);
}
}
/**
* Sets the selection to the range specified
* by the given point, where the x coordinate
* represents the start index and the y coordinate
* represents the end index.
* <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 selection to the range specified
* by the given start and end indices.
* <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();
OS.PtTextSetSelection (handle, new int [] {start}, new int [] {end});
/*
* Feature in Photon. On a multi-line text, the caret position
* is not changed with the selection start and end values are
* the same. The fix is to detect this case and change the
* cursor position.
*/
if ((style & SWT.MULTI) != 0 && start == end) {
OS.PtSetResource (handle, OS.Pt_ARG_CURSOR_POSITION, start, 0);
}
}
/**
* 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) {
if ((style & SWT.SINGLE) != 0) return;
int tabsWidth = getTabWidth (tabs);
int ptr = OS.malloc (4);
OS.memmove (ptr, new int [] {tabsWidth}, 4);
OS.PtSetResource (handle, OS.Pt_ARG_MULTITEXT_TABS, ptr, 1);
OS.free (ptr);
}
/**
* 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 string 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);
byte [] buffer = Converter.wcsToMbcs (null, string, true);
int ptr = OS.malloc (buffer.length);
OS.memmove (ptr, buffer, buffer.length);
OS.PtSetResource (handle, OS.Pt_ARG_TEXT_STRING, ptr, 0);
OS.free (ptr);
}
/**
* Sets the contents of the receiver to the characters in the array. If the receiver
* has style <code>SWT.SINGLE</code> and the argument contains multiple lines of text
* then the result of this operation is undefined and may vary between platforms.
*
* @param text a character array that contains the new text
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the 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>
*
* @see #getTextChars()
*
* @since 3.7
*/
public void setTextChars (char [] text) {
checkWidget();
}
/**
* 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>.
* Specifying a limit value larger than <code>Text.LIMIT</code> sets the
* receiver's limit to <code>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>
*
* @see #LIMIT
*/
public void setTextLimit (int limit) {
checkWidget();
if (limit == 0) error (SWT.ERROR_CANNOT_BE_ZERO);
OS.PtSetResource (handle, OS.Pt_ARG_MAX_LENGTH, 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;
OS.PtSetResource (handle, OS.Pt_ARG_MULTITEXT_TOP_LINE, index + 1, 0);
}
/**
* 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();
//NOT DONE - NOT NEEDED
}
int traversalCode (int key_sym, PhKeyEvent_t ke) {
int code = super.traversalCode (key_sym, ke);
if ((style & SWT.READ_ONLY) != 0) return code;
if ((style & SWT.MULTI) != 0) {
code &= ~SWT.TRAVERSE_RETURN;
if (key_sym == OS.Pk_Tab && ke != null) {
if ((ke.key_mods & OS.Pk_KM_Ctrl) == 0) {
code &= ~(SWT.TRAVERSE_TAB_NEXT | SWT.TRAVERSE_TAB_PREVIOUS);
}
}
}
return code;
}
boolean translateTraversal (int key_sym, PhKeyEvent_t phEvent) {
boolean translated = super.translateTraversal (key_sym, phEvent);
if ((style & SWT.SINGLE) != 0 && !translated && key_sym == OS.Pk_Return) {
postEvent (SWT.DefaultSelection);
return false;
}
return translated;
}
int widgetClass () {
if ((style & SWT.SINGLE) != 0) return OS.PtText ();
return OS.PtMultiText ();
}
}