/*******************************************************************************
* Copyright (c) 2000, 2010 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.*;
import org.eclipse.swt.internal.gtk.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.events.*;
/**
* Instances of this class are selectable user interface
* objects that represent a range of positive, numeric values.
* <p>
* At any given moment, a given slider will have a
* single 'selection' that is considered to be its
* value, which is constrained to be within the range of
* values the slider represents (that is, between its
* <em>minimum</em> and <em>maximum</em> values).
* </p><p>
* Typically, sliders will be made up of five areas:
* <ol>
* <li>an arrow button for decrementing the value</li>
* <li>a page decrement area for decrementing the value by a larger amount</li>
* <li>a <em>thumb</em> for modifying the value by mouse dragging</li>
* <li>a page increment area for incrementing the value by a larger amount</li>
* <li>an arrow button for incrementing the value</li>
* </ol>
* Based on their style, sliders are either <code>HORIZONTAL</code>
* (which have a left facing button for decrementing the value and a
* right facing button for incrementing it) or <code>VERTICAL</code>
* (which have an upward facing button for decrementing the value
* and a downward facing buttons for incrementing it).
* </p><p>
* On some platforms, the size of the slider's thumb can be
* varied relative to the magnitude of the range of values it
* represents (that is, relative to the difference between its
* maximum and minimum values). Typically, this is used to
* indicate some proportional value such as the ratio of the
* visible area of a document to the total amount of space that
* it would take to display it. SWT supports setting the thumb
* size even if the underlying platform does not, but in this
* case the appearance of the slider will not change.
* </p>
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>HORIZONTAL, VERTICAL</dd>
* <dt><b>Events:</b></dt>
* <dd>Selection</dd>
* </dl>
* <p>
* Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.
* </p><p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see ScrollBar
* @see <a href="http://www.eclipse.org/swt/snippets/#slider">Slider 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 Slider extends Control {
int detail;
boolean dragSent;
/**
* 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#HORIZONTAL
* @see SWT#VERTICAL
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Slider (Composite parent, int style) {
super (parent, checkStyle (style));
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the user changes the receiver's value, by sending
* it one of the messages defined in the <code>SelectionListener</code>
* interface.
* <p>
* When <code>widgetSelected</code> is called, the event object detail field contains one of the following values:
* <code>SWT.NONE</code> - for the end of a drag.
* <code>SWT.DRAG</code>.
* <code>SWT.HOME</code>.
* <code>SWT.END</code>.
* <code>SWT.ARROW_DOWN</code>.
* <code>SWT.ARROW_UP</code>.
* <code>SWT.PAGE_DOWN</code>.
* <code>SWT.PAGE_UP</code>.
* <code>widgetDefaultSelected</code> is not called.
* </p>
*
* @param listener the listener which should be notified when the user changes the receiver's value
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener (SelectionListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Selection,typedListener);
addListener (SWT.DefaultSelection,typedListener);
}
static int checkStyle (int style) {
return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0);
}
void createHandle (int index) {
state |= HANDLE;
fixedHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0);
if (fixedHandle == 0) error (SWT.ERROR_NO_HANDLES);
OS.gtk_fixed_set_has_window (fixedHandle, true);
int /*long*/ hAdjustment = OS.gtk_adjustment_new (0, 0, 100, 1, 10, 10);
if (hAdjustment == 0) error (SWT.ERROR_NO_HANDLES);
if ((style & SWT.HORIZONTAL) != 0) {
handle = OS.gtk_hscrollbar_new (hAdjustment);
} else {
handle = OS.gtk_vscrollbar_new (hAdjustment);
}
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
/*
* Bug in GTK. In GTK 2.10, the buttons on either end of
* a horizontal slider are created taller then the slider bar
* when the GTK_CAN_FOCUS flag is set. The fix is not to set
* the flag for horizontal bars in all versions of 2.10. Note
* that a bug has been logged with GTK about this issue.
* (http://bugzilla.gnome.org/show_bug.cgi?id=475909)
*/
if (OS.GTK_VERSION < OS.VERSION (2, 10, 0) || (style & SWT.VERTICAL) != 0) {
OS.GTK_WIDGET_SET_FLAGS (handle, OS.GTK_CAN_FOCUS);
}
OS.gtk_container_add (fixedHandle, handle);
}
int /*long*/ gtk_button_press_event (int /*long*/ widget, int /*long*/ eventPtr) {
int /*long*/ result = super.gtk_button_press_event (widget, eventPtr);
if (result != 0) return result;
detail = OS.GTK_SCROLL_NONE;
dragSent = false;
return result;
}
int /*long*/ gtk_change_value (int /*long*/ widget, int /*long*/ scroll, int /*long*/ value1, int /*long*/ value2) {
detail = (int)/*64*/scroll;
return 0;
}
int /*long*/ gtk_value_changed (int /*long*/ adjustment) {
Event event = new Event ();
dragSent = detail == OS.GTK_SCROLL_JUMP;
switch (detail) {
case OS.GTK_SCROLL_NONE: event.detail = SWT.NONE; break;
case OS.GTK_SCROLL_JUMP: event.detail = SWT.DRAG; break;
case OS.GTK_SCROLL_START: event.detail = SWT.HOME; break;
case OS.GTK_SCROLL_END: event.detail = SWT.END; break;
case OS.GTK_SCROLL_PAGE_DOWN:
case OS.GTK_SCROLL_PAGE_RIGHT:
case OS.GTK_SCROLL_PAGE_FORWARD: event.detail = SWT.PAGE_DOWN; break;
case OS.GTK_SCROLL_PAGE_UP:
case OS.GTK_SCROLL_PAGE_LEFT:
case OS.GTK_SCROLL_PAGE_BACKWARD: event.detail = SWT.PAGE_UP; break;
case OS.GTK_SCROLL_STEP_DOWN:
case OS.GTK_SCROLL_STEP_RIGHT:
case OS.GTK_SCROLL_STEP_FORWARD: event.detail = SWT.ARROW_DOWN; break;
case OS.GTK_SCROLL_STEP_UP:
case OS.GTK_SCROLL_STEP_LEFT:
case OS.GTK_SCROLL_STEP_BACKWARD: event.detail = SWT.ARROW_UP; break;
}
if (!dragSent) detail = OS.GTK_SCROLL_NONE;
sendSelectionEvent (SWT.Selection, event, false);
return 0;
}
int /*long*/ gtk_event_after (int /*long*/ widget, int /*long*/ gdkEvent) {
GdkEvent gtkEvent = new GdkEvent ();
OS.memmove (gtkEvent, gdkEvent, GdkEvent.sizeof);
switch (gtkEvent.type) {
case OS.GDK_BUTTON_RELEASE: {
GdkEventButton gdkEventButton = new GdkEventButton ();
OS.memmove (gdkEventButton, gdkEvent, GdkEventButton.sizeof);
if (gdkEventButton.button == 1 && detail == SWT.DRAG) {
if (!dragSent) {
Event event = new Event ();
event.detail = SWT.DRAG;
sendSelectionEvent (SWT.Selection, event, false);
}
sendSelectionEvent (SWT.Selection);
}
detail = OS.GTK_SCROLL_NONE;
dragSent = false;
break;
}
}
return super.gtk_event_after (widget, gdkEvent);
}
void hookEvents () {
super.hookEvents ();
if (OS.GTK_VERSION >= OS.VERSION (2, 6, 0)) {
OS.g_signal_connect_closure (handle, OS.change_value, display.closures [CHANGE_VALUE], false);
}
OS.g_signal_connect_closure (handle, OS.value_changed, display.closures [VALUE_CHANGED], false);
}
void register () {
super.register ();
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
display.addWidget (hAdjustment, this);
}
void deregister () {
super.deregister ();
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
display.removeWidget (hAdjustment);
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget();
if (wHint != SWT.DEFAULT && wHint < 0) wHint = 0;
if (hHint != SWT.DEFAULT && hHint < 0) hHint = 0;
Point size = computeNativeSize(handle, wHint, hHint, changed);
if ((style & SWT.HORIZONTAL) != 0) {
if (wHint == SWT.DEFAULT) size.x = 2 * size.x;
} else {
if (hHint == SWT.DEFAULT) size.y = 2 * size.y;
}
return size;
}
/**
* Returns the amount that the receiver's value will be
* modified by when the up/down (or right/left) arrows
* are pressed.
*
* @return the increment
*
* @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 getIncrement () {
checkWidget ();
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
GtkAdjustment adjustment = new GtkAdjustment ();
OS.memmove (adjustment, hAdjustment);
return (int) adjustment.step_increment;
}
/**
* Returns the maximum value which the receiver will allow.
*
* @return the maximum
*
* @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 getMaximum () {
checkWidget ();
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
GtkAdjustment adjustment = new GtkAdjustment ();
OS.memmove (adjustment, hAdjustment);
return (int) adjustment.upper;
}
/**
* Returns the minimum value which the receiver will allow.
*
* @return the minimum
*
* @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 getMinimum () {
checkWidget ();
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
GtkAdjustment adjustment = new GtkAdjustment ();
OS.memmove (adjustment, hAdjustment);
return (int) adjustment.lower;
}
/**
* Returns the amount that the receiver's value will be
* modified by when the page increment/decrement areas
* are selected.
*
* @return the page increment
*
* @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 getPageIncrement () {
checkWidget ();
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
GtkAdjustment adjustment = new GtkAdjustment ();
OS.memmove (adjustment, hAdjustment);
return (int) adjustment.page_increment;
}
/**
* Returns the 'selection', which is the receiver's value.
*
* @return 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 int getSelection () {
checkWidget ();
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
GtkAdjustment adjustment = new GtkAdjustment ();
OS.memmove (adjustment, hAdjustment);
return (int) adjustment.value;
}
/**
* Returns the receiver's thumb value.
*
* @return the thumb value
*
* @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 getThumb () {
checkWidget ();
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
GtkAdjustment adjustment = new GtkAdjustment ();
OS.memmove (adjustment, hAdjustment);
return (int) adjustment.page_size;
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the user changes the receiver's value.
*
* @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);
}
/**
* Sets the amount that the receiver's value will be
* modified by when the up/down (or right/left) arrows
* are pressed to the argument, which must be at least
* one.
*
* @param value the new increment (must be greater than zero)
*
* @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 setIncrement (int value) {
checkWidget ();
if (value < 1) return;
OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
OS.gtk_range_set_increments (handle, value, getPageIncrement ());
OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
}
/**
* Sets the maximum. If this value is negative or less than or
* equal to the minimum, the value is ignored. If necessary, first
* the thumb and then the selection are adjusted to fit within the
* new range.
*
* @param value the new maximum, which must be greater than the current minimum
*
* @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 setMaximum (int value) {
checkWidget ();
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
GtkAdjustment adjustment = new GtkAdjustment ();
OS.memmove (adjustment, hAdjustment);
int minimum = (int) adjustment.lower;
if (value <= minimum) return;
adjustment.upper = value;
adjustment.page_size = Math.min ((int)adjustment.page_size, value - minimum);
adjustment.value = Math.min ((int)adjustment.value, (int)(value - adjustment.page_size));
OS.memmove (hAdjustment, adjustment);
OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
OS.gtk_adjustment_changed (hAdjustment);
OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
}
/**
* Sets the minimum value. If this value is negative or greater
* than or equal to the maximum, the value is ignored. If necessary,
* first the thumb and then the selection are adjusted to fit within
* the new range.
*
* @param value the new minimum
*
* @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 setMinimum (int value) {
checkWidget ();
if (value < 0) return;
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
GtkAdjustment adjustment = new GtkAdjustment ();
OS.memmove (adjustment, hAdjustment);
int maximum = (int) adjustment.upper;
if (value >= maximum) return;
adjustment.lower = value;
adjustment.page_size = Math.min ((int)adjustment.page_size, maximum - value);
adjustment.value = Math.max ((int)adjustment.value, value);
OS.memmove (hAdjustment, adjustment);
OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
OS.gtk_adjustment_changed (hAdjustment);
OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
}
void setOrientation (boolean create) {
super.setOrientation (create);
if ((style & SWT.RIGHT_TO_LEFT) != 0 || !create) {
if ((style & SWT.HORIZONTAL) != 0) {
OS.gtk_range_set_inverted (handle, (style & SWT.RIGHT_TO_LEFT) != 0);
}
}
}
/**
* Sets the amount that the receiver's value will be
* modified by when the page increment/decrement areas
* are selected to the argument, which must be at least
* one.
*
* @param value the page increment (must be greater than zero)
*
* @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 setPageIncrement (int value) {
checkWidget ();
if (value < 1) return;
OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
OS.gtk_range_set_increments (handle, getIncrement (), value);
OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
}
/**
* Sets the 'selection', which is the receiver's
* value, to the argument which must be greater than or equal
* to zero.
*
* @param value the new selection (must be zero or greater)
*
* @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 value) {
checkWidget ();
OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
OS.gtk_range_set_value (handle, value);
OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
}
/**
* Sets the thumb value. The thumb value should be used to represent
* the size of the visual portion of the current range. This value is
* usually the same as the page increment value.
* <p>
* This new value will be ignored if it is less than one, and will be
* clamped if it exceeds the receiver's current range.
* </p>
*
* @param value the new thumb value, which must be at least one and not
* larger than the size of the current 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 setThumb (int value) {
checkWidget ();
if (value < 1) return;
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
GtkAdjustment adjustment = new GtkAdjustment ();
OS.memmove (adjustment, hAdjustment);
value = (int) Math.min (value, (int)(adjustment.upper - adjustment.lower));
adjustment.page_size = (double) value;
adjustment.value = Math.min ((int)adjustment.value, (int)(adjustment.upper - value));
OS.memmove (hAdjustment, adjustment);
OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
OS.gtk_adjustment_changed (hAdjustment);
OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
}
/**
* Sets the receiver's selection, minimum value, maximum
* value, thumb, increment and page increment all at once.
* <p>
* Note: This is similar to setting the values individually
* using the appropriate methods, but may be implemented in a
* more efficient fashion on some platforms.
* </p>
*
* @param selection the new selection value
* @param minimum the new minimum value
* @param maximum the new maximum value
* @param thumb the new thumb value
* @param increment the new increment value
* @param pageIncrement the new pageIncrement value
*
* @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 setValues (int selection, int minimum, int maximum, int thumb, int increment, int pageIncrement) {
checkWidget ();
if (minimum < 0) return;
if (maximum < 0) return;
if (thumb < 1) return;
if (increment < 1) return;
if (pageIncrement < 1) return;
thumb = Math.min (thumb, maximum - minimum);
int /*long*/ hAdjustment = OS.gtk_range_get_adjustment (handle);
GtkAdjustment adjustment = new GtkAdjustment ();
OS.memmove (adjustment, hAdjustment);
adjustment.value = Math.min (Math.max (selection, minimum), maximum - thumb);
adjustment.lower = (double) minimum;
adjustment.upper = (double) maximum;
adjustment.page_size = (double) thumb;
adjustment.step_increment = (double) increment;
adjustment.page_increment = (double) pageIncrement;
OS.memmove (hAdjustment, adjustment);
OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
OS.gtk_adjustment_changed (hAdjustment);
OS.gtk_adjustment_value_changed (hAdjustment);
OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, VALUE_CHANGED);
}
}
