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<a name="gtk3-GtkTreeView-drag-and-drop"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gtk3-GtkTreeView-drag-and-drop.top_of_page"></a>GtkTreeView drag-and-drop</span></h2>
<p>GtkTreeView drag-and-drop — Interfaces for drag-and-drop support in GtkTreeView</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gtk3-GtkTreeView-drag-and-drop.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#gtk-tree-drag-source-drag-data-delete" title="gtk_tree_drag_source_drag_data_delete ()">gtk_tree_drag_source_drag_data_delete</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#gtk-tree-drag-source-drag-data-get" title="gtk_tree_drag_source_drag_data_get ()">gtk_tree_drag_source_drag_data_get</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#gtk-tree-drag-source-row-draggable" title="gtk_tree_drag_source_row_draggable ()">gtk_tree_drag_source_row_draggable</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#gtk-tree-drag-dest-drag-data-received" title="gtk_tree_drag_dest_drag_data_received ()">gtk_tree_drag_dest_drag_data_received</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#gtk-tree-drag-dest-row-drop-possible" title="gtk_tree_drag_dest_row_drop_possible ()">gtk_tree_drag_dest_row_drop_possible</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#gtk-tree-set-row-drag-data" title="gtk_tree_set_row_drag_data ()">gtk_tree_set_row_drag_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#gtk-tree-get-row-drag-data" title="gtk_tree_get_row_drag_data ()">gtk_tree_get_row_drag_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<a name="GtkTreeDragSource"></a><a name="GtkTreeDragDest"></a><div class="refsect1">
<a name="gtk3-GtkTreeView-drag-and-drop.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource-struct" title="GtkTreeDragSource">GtkTreeDragSource</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSourceIface" title="struct GtkTreeDragSourceIface">GtkTreeDragSourceIface</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragDest-struct" title="GtkTreeDragDest">GtkTreeDragDest</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragDestIface" title="struct GtkTreeDragDestIface">GtkTreeDragDestIface</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gtk3-GtkTreeView-drag-and-drop.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/GTypeModule.html">GInterface</a>
<span class="lineart">├──</span> GtkTreeDragDest
<span class="lineart">╰──</span> GtkTreeDragSource
</pre>
</div>
<div class="refsect1">
<a name="gtk3-GtkTreeView-drag-and-drop.implementations"></a><h2>Known Implementations</h2>
<p>
GtkTreeDragSource is implemented by
<a class="link" href="GtkListStore.html" title="GtkListStore">GtkListStore</a>, <a class="link" href="GtkTreeModelFilter.html" title="GtkTreeModelFilter">GtkTreeModelFilter</a>, <a class="link" href="GtkTreeModelSort.html" title="GtkTreeModelSort">GtkTreeModelSort</a> and <a class="link" href="GtkTreeStore.html" title="GtkTreeStore">GtkTreeStore</a>.</p>
<p>
GtkTreeDragDest is implemented by
<a class="link" href="GtkListStore.html" title="GtkListStore">GtkListStore</a> and <a class="link" href="GtkTreeStore.html" title="GtkTreeStore">GtkTreeStore</a>.</p>
</div>
<div class="refsect1">
<a name="gtk3-GtkTreeView-drag-and-drop.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <gtk/gtk.h>
</pre>
</div>
<div class="refsect1">
<a name="gtk3-GtkTreeView-drag-and-drop.description"></a><h2>Description</h2>
<p>GTK+ supports Drag-and-Drop in tree views with a high-level and a low-level
API.</p>
<p>The low-level API consists of the GTK+ DND API, augmented by some treeview
utility functions: <a class="link" href="GtkTreeView.html#gtk-tree-view-set-drag-dest-row" title="gtk_tree_view_set_drag_dest_row ()"><code class="function">gtk_tree_view_set_drag_dest_row()</code></a>,
<a class="link" href="GtkTreeView.html#gtk-tree-view-get-drag-dest-row" title="gtk_tree_view_get_drag_dest_row ()"><code class="function">gtk_tree_view_get_drag_dest_row()</code></a>, <a class="link" href="GtkTreeView.html#gtk-tree-view-get-dest-row-at-pos" title="gtk_tree_view_get_dest_row_at_pos ()"><code class="function">gtk_tree_view_get_dest_row_at_pos()</code></a>,
<a class="link" href="GtkTreeView.html#gtk-tree-view-create-row-drag-icon" title="gtk_tree_view_create_row_drag_icon ()"><code class="function">gtk_tree_view_create_row_drag_icon()</code></a>, <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#gtk-tree-set-row-drag-data" title="gtk_tree_set_row_drag_data ()"><code class="function">gtk_tree_set_row_drag_data()</code></a> and
<a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#gtk-tree-get-row-drag-data" title="gtk_tree_get_row_drag_data ()"><code class="function">gtk_tree_get_row_drag_data()</code></a>. This API leaves a lot of flexibility, but
nothing is done automatically, and implementing advanced features like
hover-to-open-rows or autoscrolling on top of this API is a lot of work.</p>
<p>On the other hand, if you write to the high-level API, then all the
bookkeeping of rows is done for you, as well as things like hover-to-open
and auto-scroll, but your models have to implement the
<a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a> and <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragDest"><span class="type">GtkTreeDragDest</span></a> interfaces.</p>
</div>
<div class="refsect1">
<a name="gtk3-GtkTreeView-drag-and-drop.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gtk-tree-drag-source-drag-data-delete"></a><h3>gtk_tree_drag_source_drag_data_delete ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gtk_tree_drag_source_drag_data_delete (<em class="parameter"><code><a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a> *drag_source</code></em>,
<em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreePath"><span class="type">GtkTreePath</span></a> *path</code></em>);</pre>
<p>Asks the <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a> to delete the row at <em class="parameter"><code>path</code></em>
, because
it was moved somewhere else via drag-and-drop. Returns <code class="literal">FALSE</code>
if the deletion fails because <em class="parameter"><code>path</code></em>
no longer exists, or for
some model-specific reason. Should robustly handle a <em class="parameter"><code>path</code></em>
no
longer found in the model!</p>
<div class="refsect3">
<a name="gtk-tree-drag-source-drag-data-delete.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>drag_source</p></td>
<td class="parameter_description"><p>a <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>path</p></td>
<td class="parameter_description"><p>row that was being dragged</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-tree-drag-source-drag-data-delete.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the row was successfully deleted</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-tree-drag-source-drag-data-get"></a><h3>gtk_tree_drag_source_drag_data_get ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gtk_tree_drag_source_drag_data_get (<em class="parameter"><code><a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a> *drag_source</code></em>,
<em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreePath"><span class="type">GtkTreePath</span></a> *path</code></em>,
<em class="parameter"><code><a class="link" href="gtk3-Selections.html#GtkSelectionData"><span class="type">GtkSelectionData</span></a> *selection_data</code></em>);</pre>
<p>Asks the <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a> to fill in <em class="parameter"><code>selection_data</code></em>
with a
representation of the row at <em class="parameter"><code>path</code></em>
. <em class="parameter"><code>selection_data->target</code></em>
gives
the required type of the data. Should robustly handle a <em class="parameter"><code>path</code></em>
no
longer found in the model!</p>
<div class="refsect3">
<a name="gtk-tree-drag-source-drag-data-get.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>drag_source</p></td>
<td class="parameter_description"><p>a <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>path</p></td>
<td class="parameter_description"><p>row that was dragged</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>selection_data</p></td>
<td class="parameter_description"><p>a <a class="link" href="gtk3-Selections.html#GtkSelectionData"><span class="type">GtkSelectionData</span></a> to fill with data
from the dragged row</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-tree-drag-source-drag-data-get.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if data of the required type was provided </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-tree-drag-source-row-draggable"></a><h3>gtk_tree_drag_source_row_draggable ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gtk_tree_drag_source_row_draggable (<em class="parameter"><code><a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a> *drag_source</code></em>,
<em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreePath"><span class="type">GtkTreePath</span></a> *path</code></em>);</pre>
<p>Asks the <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a> whether a particular row can be used as
the source of a DND operation. If the source doesn’t implement
this interface, the row is assumed draggable.</p>
<div class="refsect3">
<a name="gtk-tree-drag-source-row-draggable.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>drag_source</p></td>
<td class="parameter_description"><p>a <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>path</p></td>
<td class="parameter_description"><p>row on which user is initiating a drag</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-tree-drag-source-row-draggable.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the row can be dragged</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-tree-drag-dest-drag-data-received"></a><h3>gtk_tree_drag_dest_drag_data_received ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gtk_tree_drag_dest_drag_data_received (<em class="parameter"><code><a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragDest"><span class="type">GtkTreeDragDest</span></a> *drag_dest</code></em>,
<em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreePath"><span class="type">GtkTreePath</span></a> *dest</code></em>,
<em class="parameter"><code><a class="link" href="gtk3-Selections.html#GtkSelectionData"><span class="type">GtkSelectionData</span></a> *selection_data</code></em>);</pre>
<p>Asks the <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragDest"><span class="type">GtkTreeDragDest</span></a> to insert a row before the path <em class="parameter"><code>dest</code></em>
,
deriving the contents of the row from <em class="parameter"><code>selection_data</code></em>
. If <em class="parameter"><code>dest</code></em>
is
outside the tree so that inserting before it is impossible, <code class="literal">FALSE</code>
will be returned. Also, <code class="literal">FALSE</code> may be returned if the new row is
not created for some model-specific reason. Should robustly handle
a <em class="parameter"><code>dest</code></em>
no longer found in the model!</p>
<div class="refsect3">
<a name="gtk-tree-drag-dest-drag-data-received.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>drag_dest</p></td>
<td class="parameter_description"><p>a <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragDest"><span class="type">GtkTreeDragDest</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dest</p></td>
<td class="parameter_description"><p>row to drop in front of</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>selection_data</p></td>
<td class="parameter_description"><p>data to drop</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-tree-drag-dest-drag-data-received.returns"></a><h4>Returns</h4>
<p> whether a new row was created before position <em class="parameter"><code>dest</code></em>
</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-tree-drag-dest-row-drop-possible"></a><h3>gtk_tree_drag_dest_row_drop_possible ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gtk_tree_drag_dest_row_drop_possible (<em class="parameter"><code><a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragDest"><span class="type">GtkTreeDragDest</span></a> *drag_dest</code></em>,
<em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreePath"><span class="type">GtkTreePath</span></a> *dest_path</code></em>,
<em class="parameter"><code><a class="link" href="gtk3-Selections.html#GtkSelectionData"><span class="type">GtkSelectionData</span></a> *selection_data</code></em>);</pre>
<p>Determines whether a drop is possible before the given <em class="parameter"><code>dest_path</code></em>
,
at the same depth as <em class="parameter"><code>dest_path</code></em>
. i.e., can we drop the data in
<em class="parameter"><code>selection_data</code></em>
at that location. <em class="parameter"><code>dest_path</code></em>
does not have to
exist; the return value will almost certainly be <code class="literal">FALSE</code> if the
parent of <em class="parameter"><code>dest_path</code></em>
doesn’t exist, though.</p>
<div class="refsect3">
<a name="gtk-tree-drag-dest-row-drop-possible.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>drag_dest</p></td>
<td class="parameter_description"><p>a <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragDest"><span class="type">GtkTreeDragDest</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dest_path</p></td>
<td class="parameter_description"><p>destination row</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>selection_data</p></td>
<td class="parameter_description"><p>the data being dragged</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-tree-drag-dest-row-drop-possible.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if a drop is possible before <em class="parameter"><code>dest_path</code></em>
</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-tree-set-row-drag-data"></a><h3>gtk_tree_set_row_drag_data ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gtk_tree_set_row_drag_data (<em class="parameter"><code><a class="link" href="gtk3-Selections.html#GtkSelectionData"><span class="type">GtkSelectionData</span></a> *selection_data</code></em>,
<em class="parameter"><code><a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a> *tree_model</code></em>,
<em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreePath"><span class="type">GtkTreePath</span></a> *path</code></em>);</pre>
<p>Sets selection data of target type <code class="literal">GTK_TREE_MODEL_ROW</code>. Normally used
in a drag_data_get handler.</p>
<div class="refsect3">
<a name="gtk-tree-set-row-drag-data.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>selection_data</p></td>
<td class="parameter_description"><p>some <a class="link" href="gtk3-Selections.html#GtkSelectionData"><span class="type">GtkSelectionData</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>tree_model</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>path</p></td>
<td class="parameter_description"><p>a row in <em class="parameter"><code>tree_model</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-tree-set-row-drag-data.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the <a class="link" href="gtk3-Selections.html#GtkSelectionData"><span class="type">GtkSelectionData</span></a> had the proper target type to allow us to set a tree row</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-tree-get-row-drag-data"></a><h3>gtk_tree_get_row_drag_data ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gtk_tree_get_row_drag_data (<em class="parameter"><code><a class="link" href="gtk3-Selections.html#GtkSelectionData"><span class="type">GtkSelectionData</span></a> *selection_data</code></em>,
<em class="parameter"><code><a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a> **tree_model</code></em>,
<em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreePath"><span class="type">GtkTreePath</span></a> **path</code></em>);</pre>
<p>Obtains a <em class="parameter"><code>tree_model</code></em>
and <em class="parameter"><code>path</code></em>
from selection data of target type
<code class="literal">GTK_TREE_MODEL_ROW</code>. Normally called from a drag_data_received handler.
This function can only be used if <em class="parameter"><code>selection_data</code></em>
originates from the same
process that’s calling this function, because a pointer to the tree model
is being passed around. If you aren’t in the same process, then you'll
get memory corruption. In the <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragDest"><span class="type">GtkTreeDragDest</span></a> drag_data_received handler,
you can assume that selection data of type <code class="literal">GTK_TREE_MODEL_ROW</code> is
in from the current process. The returned path must be freed with
<a class="link" href="GtkTreeModel.html#gtk-tree-path-free" title="gtk_tree_path_free ()"><code class="function">gtk_tree_path_free()</code></a>.</p>
<div class="refsect3">
<a name="gtk-tree-get-row-drag-data.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>selection_data</p></td>
<td class="parameter_description"><p>a <a class="link" href="gtk3-Selections.html#GtkSelectionData"><span class="type">GtkSelectionData</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>tree_model</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>path</p></td>
<td class="parameter_description"><p>row in <em class="parameter"><code>tree_model</code></em>
. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>][<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-tree-get-row-drag-data.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if <em class="parameter"><code>selection_data</code></em>
had target type <code class="literal">GTK_TREE_MODEL_ROW</code> and
is otherwise valid</p>
</div>
</div>
</div>
<div class="refsect1">
<a name="gtk3-GtkTreeView-drag-and-drop.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GtkTreeDragSource-struct"></a><h3>GtkTreeDragSource</h3>
<pre class="programlisting">typedef struct _GtkTreeDragSource GtkTreeDragSource;</pre>
</div>
<hr>
<div class="refsect2">
<a name="GtkTreeDragSourceIface"></a><h3>struct GtkTreeDragSourceIface</h3>
<pre class="programlisting">struct GtkTreeDragSourceIface {
/* VTable - not signals */
gboolean (* row_draggable) (GtkTreeDragSource *drag_source,
GtkTreePath *path);
gboolean (* drag_data_get) (GtkTreeDragSource *drag_source,
GtkTreePath *path,
GtkSelectionData *selection_data);
gboolean (* drag_data_delete) (GtkTreeDragSource *drag_source,
GtkTreePath *path);
};
</pre>
<div class="refsect3">
<a name="GtkTreeDragSourceIface.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GtkTreeDragSourceIface.row-draggable"></a>row_draggable</code></em> ()</p></td>
<td class="struct_member_description"><p>Asks the <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a> whether a particular
row can be used as the source of a DND operation.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GtkTreeDragSourceIface.drag-data-get"></a>drag_data_get</code></em> ()</p></td>
<td class="struct_member_description"><p>Asks the <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a> to fill in
selection_data with a representation of the row at path.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GtkTreeDragSourceIface.drag-data-delete"></a>drag_data_delete</code></em> ()</p></td>
<td class="struct_member_description"><p>Asks the <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragSource"><span class="type">GtkTreeDragSource</span></a> to delete the row at
path, because it was moved somewhere else via drag-and-drop.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GtkTreeDragDest-struct"></a><h3>GtkTreeDragDest</h3>
<pre class="programlisting">typedef struct _GtkTreeDragDest GtkTreeDragDest;</pre>
</div>
<hr>
<div class="refsect2">
<a name="GtkTreeDragDestIface"></a><h3>struct GtkTreeDragDestIface</h3>
<pre class="programlisting">struct GtkTreeDragDestIface {
/* VTable - not signals */
gboolean (* drag_data_received) (GtkTreeDragDest *drag_dest,
GtkTreePath *dest,
GtkSelectionData *selection_data);
gboolean (* row_drop_possible) (GtkTreeDragDest *drag_dest,
GtkTreePath *dest_path,
GtkSelectionData *selection_data);
};
</pre>
<div class="refsect3">
<a name="GtkTreeDragDestIface.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GtkTreeDragDestIface.drag-data-received"></a>drag_data_received</code></em> ()</p></td>
<td class="struct_member_description"><p>Asks the <a class="link" href="gtk3-GtkTreeView-drag-and-drop.html#GtkTreeDragDest"><span class="type">GtkTreeDragDest</span></a> to insert a row
before the path dest, deriving the contents of the row from
selection_data.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GtkTreeDragDestIface.row-drop-possible"></a>row_drop_possible</code></em> ()</p></td>
<td class="struct_member_description"><p>Determines whether a drop is possible before
the given dest_path, at the same depth as dest_path.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
</div>
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