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<!-- ##### SECTION Title ##### -->
GtkHandleBox
<!-- ##### SECTION Short_Description ##### -->
a widget for detachable window portions
<!-- ##### SECTION Long_Description ##### -->
<para>
The #GtkHandleBox widget allows a portion of a window to be "torn
off". It is a bin widget which displays its child and a handle that
the user can drag to tear off a separate window (the <firstterm>float
window</firstterm>) containing the child widget. A thin
<firstterm>ghost</firstterm> is drawn in the original location of the
handlebox. By dragging the separate window back to its original
location, it can be reattached.
</para>
<para>
When reattaching, the ghost and float window, must be aligned
along one of the edges, the <firstterm>snap edge</firstterm>.
This either can be specified by the application programmer
explicitely, or GTK+ will pick a reasonable default based
on the handle position.
</para>
<para>
To make detaching and reattaching the handlebox as minimally confusing
as possible to the user, it is important to set the snap edge so that
the snap edge does not move when the handlebox is deattached. For
instance, if the handlebox is packed at the bottom of a VBox, then
when the handlebox is detached, the bottom edge of the handlebox's
allocation will remain fixed as the height of the handlebox shrinks,
so the snap edge should be set to %GTK_POS_BOTTOM.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### SECTION Stability_Level ##### -->
<!-- ##### STRUCT GtkHandleBox ##### -->
<para>
The #GtkHandleBox-struct struct contains the following fields.
(These fields should be considered read-only. They should never be set by
an application.)
<informaltable pgwide="1" frame="none" role="struct">
<tgroup cols="2"><colspec colwidth="2*"/><colspec colwidth="8*"/>
<tbody>
<row>
<entry>GtkShadowType shadow_type;</entry>
<entry>The shadow type for the entry. (See gtk_handle_box_set_shadow_type()).</entry>
</row>
<row>
<entry>GtkPositionType handle_position;</entry>
<entry>The position of the handlebox's handle with respect
to the child. (See gtk_handle_box_set_handle_position())</entry>
</row>
<row>
<entry>gint snap_edge;</entry>
<entry>A value of type #GtkPosition type indicating snap edge for the widget.
(See gtk_handle_box_set_snap_edge). The value of -1 indicates
that this value has not been set.</entry>
</row>
<row>
<entry>#gboolean child_detached;</entry>
<entry>A boolean value indicating whether the handlebox's
child is attached or detached.</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
<!-- ##### SIGNAL GtkHandleBox::child-attached ##### -->
<para>
This signal is emitted when the contents of the
handlebox are reattached to the main window.
</para>
@handlebox: the object which received the signal.
@widget: the child widget of the handlebox.
(this argument provides no extra information
and is here only for backwards-compatibility)
<!-- ##### SIGNAL GtkHandleBox::child-detached ##### -->
<para>
This signal is emitted when the contents of the
handlebox are detached from the main window.
</para>
@handlebox: the object which received the signal.
@widget: the child widget of the handlebox.
(this argument provides no extra information
and is here only for backwards-compatibility)
<!-- ##### ARG GtkHandleBox:child-detached ##### -->
<para>
</para>
<!-- ##### ARG GtkHandleBox:handle-position ##### -->
<para>
</para>
<!-- ##### ARG GtkHandleBox:shadow ##### -->
<para>
</para>
<!-- ##### ARG GtkHandleBox:shadow-type ##### -->
<para>
</para>
<!-- ##### ARG GtkHandleBox:snap-edge ##### -->
<para>
</para>
<!-- ##### ARG GtkHandleBox:snap-edge-set ##### -->
<para>
</para>
<!-- ##### FUNCTION gtk_handle_box_new ##### -->
<para>
Create a new handle box.
</para>
@Returns: a new #GtkHandleBox.
<!-- ##### FUNCTION gtk_handle_box_set_shadow_type ##### -->
<para>
Sets the type of shadow to be drawn around the border
of the handle box.
</para>
@handle_box: a #GtkHandleBox
@type: the shadow type.
<!-- ##### FUNCTION gtk_handle_box_set_handle_position ##### -->
<para>
Sets the side of the handlebox where the handle is drawn.
</para>
@handle_box: a #GtkHandleBox
@position: the side of the handlebox where the handle should be drawn.
<!-- ##### FUNCTION gtk_handle_box_set_snap_edge ##### -->
<para>
Sets the snap edge of a handlebox. The snap edge is
the edge of the detached child that must be aligned
with the corresponding edge of the "ghost" left
behind when the child was detached to reattach
the torn-off window. Usually, the snap edge should
be chosen so that it stays in the same place on
the screen when the handlebox is torn off.
</para>
<para>
If the snap edge is not set, then an appropriate value
will be guessed from the handle position. If the
handle position is %GTK_POS_RIGHT or %GTK_POS_LEFT,
then the snap edge will be %GTK_POS_TOP, otherwise
it will be %GTK_POS_LEFT.
</para>
@handle_box: a #GtkHandleBox
@edge: the snap edge, or -1 to unset the value; in which
case GTK+ will try to guess an appropriate value
in the future.
<!-- ##### FUNCTION gtk_handle_box_get_handle_position ##### -->
<para>
</para>
@handle_box:
@Returns:
<!-- ##### FUNCTION gtk_handle_box_get_shadow_type ##### -->
<para>
</para>
@handle_box:
@Returns:
<!-- ##### FUNCTION gtk_handle_box_get_snap_edge ##### -->
<para>
</para>
@handle_box:
@Returns:
<!-- ##### FUNCTION gtk_handle_box_get_child_detached ##### -->
<para>
</para>
@handle_box:
@Returns:
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