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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>GtkGestureDrag: GTK+ 3 Reference Manual</title> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="index.html" title="GTK+ 3 Reference Manual"> <link rel="up" href="Gestures.html" title="Gestures and event handling"> <link rel="prev" href="GtkGestureSingle.html" title="GtkGestureSingle"> <link rel="next" href="GtkGestureLongPress.html" title="GtkGestureLongPress"> <meta name="generator" content="GTK-Doc V1.32 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> <td width="100%" align="left" class="shortcuts"> <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> <a href="#GtkGestureDrag.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> <a href="#GtkGestureDrag.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_signals"> <span class="dim">|</span> <a href="#GtkGestureDrag.signals" class="shortcut">Signals</a></span> </td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="Gestures.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="GtkGestureSingle.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="GtkGestureLongPress.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="GtkGestureDrag"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="GtkGestureDrag.top_of_page"></a>GtkGestureDrag</span></h2> <p>GtkGestureDrag — Drag gesture</p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="GtkGestureDrag.functions"></a><h2>Functions</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="functions_proto_type"> <col class="functions_proto_name"> </colgroup> <tbody> <tr> <td class="function_type"> <a class="link" href="GtkGesture.html" title="GtkGesture"><span class="returnvalue">GtkGesture</span></a> * </td> <td class="function_name"> <a class="link" href="GtkGestureDrag.html#gtk-gesture-drag-new" title="gtk_gesture_drag_new ()">gtk_gesture_drag_new</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> </td> <td class="function_name"> <a class="link" href="GtkGestureDrag.html#gtk-gesture-drag-get-start-point" title="gtk_gesture_drag_get_start_point ()">gtk_gesture_drag_get_start_point</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> </td> <td class="function_name"> <a class="link" href="GtkGestureDrag.html#gtk-gesture-drag-get-offset" title="gtk_gesture_drag_get_offset ()">gtk_gesture_drag_get_offset</a> <span class="c_punctuation">()</span> </td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="GtkGestureDrag.signals"></a><h2>Signals</h2> <div class="informaltable"><table class="informaltable" border="0"> <colgroup> <col width="150px" class="signal_proto_type"> <col width="300px" class="signal_proto_name"> <col width="200px" class="signal_proto_flags"> </colgroup> <tbody> <tr> <td class="signal_type"><span class="returnvalue">void</span></td> <td class="signal_name"><a class="link" href="GtkGestureDrag.html#GtkGestureDrag-drag-begin" title="The “drag-begin” signal">drag-begin</a></td> <td class="signal_flags"><a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></td> </tr> <tr> <td class="signal_type"><span class="returnvalue">void</span></td> <td class="signal_name"><a class="link" href="GtkGestureDrag.html#GtkGestureDrag-drag-end" title="The “drag-end” signal">drag-end</a></td> <td class="signal_flags"><a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></td> </tr> <tr> <td class="signal_type"><span class="returnvalue">void</span></td> <td class="signal_name"><a class="link" href="GtkGestureDrag.html#GtkGestureDrag-drag-update" title="The “drag-update” signal">drag-update</a></td> <td class="signal_flags"><a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="GtkGestureDrag.other"></a><h2>Types and Values</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="other_proto_type"> <col class="other_proto_name"> </colgroup> <tbody><tr> <td class="datatype_keyword"> </td> <td class="function_name"><a class="link" href="GtkGestureDrag.html#GtkGestureDrag-struct" title="GtkGestureDrag">GtkGestureDrag</a></td> </tr></tbody> </table></div> </div> <div class="refsect1"> <a name="GtkGestureDrag.object-hierarchy"></a><h2>Object Hierarchy</h2> <pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a> <span class="lineart">╰──</span> <a class="link" href="GtkEventController.html" title="GtkEventController">GtkEventController</a> <span class="lineart">╰──</span> <a class="link" href="GtkGesture.html" title="GtkGesture">GtkGesture</a> <span class="lineart">╰──</span> <a class="link" href="GtkGestureSingle.html" title="GtkGestureSingle">GtkGestureSingle</a> <span class="lineart">╰──</span> GtkGestureDrag <span class="lineart">╰──</span> <a class="link" href="GtkGesturePan.html" title="GtkGesturePan">GtkGesturePan</a> </pre> </div> <div class="refsect1"> <a name="GtkGestureDrag.includes"></a><h2>Includes</h2> <pre class="synopsis">#include <gtk/gtk.h> </pre> </div> <div class="refsect1"> <a name="GtkGestureDrag.description"></a><h2>Description</h2> <p><a class="link" href="GtkGestureDrag.html" title="GtkGestureDrag"><span class="type">GtkGestureDrag</span></a> is a <a class="link" href="GtkGesture.html" title="GtkGesture"><span class="type">GtkGesture</span></a> implementation that recognizes drag operations. The drag operation itself can be tracked throught the <a class="link" href="GtkGestureDrag.html#GtkGestureDrag-drag-begin" title="The “drag-begin” signal"><span class="type">“drag-begin”</span></a>, <a class="link" href="GtkGestureDrag.html#GtkGestureDrag-drag-update" title="The “drag-update” signal"><span class="type">“drag-update”</span></a> and <a class="link" href="GtkGestureDrag.html#GtkGestureDrag-drag-end" title="The “drag-end” signal"><span class="type">“drag-end”</span></a> signals, or the relevant coordinates be extracted through <a class="link" href="GtkGestureDrag.html#gtk-gesture-drag-get-offset" title="gtk_gesture_drag_get_offset ()"><code class="function">gtk_gesture_drag_get_offset()</code></a> and <a class="link" href="GtkGestureDrag.html#gtk-gesture-drag-get-start-point" title="gtk_gesture_drag_get_start_point ()"><code class="function">gtk_gesture_drag_get_start_point()</code></a>.</p> </div> <div class="refsect1"> <a name="GtkGestureDrag.functions_details"></a><h2>Functions</h2> <div class="refsect2"> <a name="gtk-gesture-drag-new"></a><h3>gtk_gesture_drag_new ()</h3> <pre class="programlisting"><a class="link" href="GtkGesture.html" title="GtkGesture"><span class="returnvalue">GtkGesture</span></a> * gtk_gesture_drag_new (<em class="parameter"><code><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> *widget</code></em>);</pre> <p>Returns a newly created <a class="link" href="GtkGesture.html" title="GtkGesture"><span class="type">GtkGesture</span></a> that recognizes drags.</p> <div class="refsect3"> <a name="gtk-gesture-drag-new.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>widget</p></td> <td class="parameter_description"><p>a <a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a></p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="gtk-gesture-drag-new.returns"></a><h4>Returns</h4> <p> a newly created <a class="link" href="GtkGestureDrag.html" title="GtkGestureDrag"><span class="type">GtkGestureDrag</span></a></p> </div> <p class="since">Since: <a class="link" href="api-index-3-14.html#api-index-3.14">3.14</a></p> </div> <hr> <div class="refsect2"> <a name="gtk-gesture-drag-get-start-point"></a><h3>gtk_gesture_drag_get_start_point ()</h3> <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gtk_gesture_drag_get_start_point (<em class="parameter"><code><a class="link" href="GtkGestureDrag.html" title="GtkGestureDrag"><span class="type">GtkGestureDrag</span></a> *gesture</code></em>, <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *x</code></em>, <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *y</code></em>);</pre> <p>If the <em class="parameter"><code>gesture</code></em> is active, this function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> and fills in <em class="parameter"><code>x</code></em> and <em class="parameter"><code>y</code></em> with the drag start coordinates, in window-relative coordinates.</p> <div class="refsect3"> <a name="gtk-gesture-drag-get-start-point.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>gesture</p></td> <td class="parameter_description"><p>a <a class="link" href="GtkGesture.html" title="GtkGesture"><span class="type">GtkGesture</span></a></p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>x</p></td> <td class="parameter_description"><p>X coordinate for the drag start point. </p></td> <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td> </tr> <tr> <td class="parameter_name"><p>y</p></td> <td class="parameter_description"><p>Y coordinate for the drag start point. </p></td> <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="gtk-gesture-drag-get-start-point.returns"></a><h4>Returns</h4> <p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the gesture is active</p> </div> <p class="since">Since: <a class="link" href="api-index-3-14.html#api-index-3.14">3.14</a></p> </div> <hr> <div class="refsect2"> <a name="gtk-gesture-drag-get-offset"></a><h3>gtk_gesture_drag_get_offset ()</h3> <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gtk_gesture_drag_get_offset (<em class="parameter"><code><a class="link" href="GtkGestureDrag.html" title="GtkGestureDrag"><span class="type">GtkGestureDrag</span></a> *gesture</code></em>, <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *x</code></em>, <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *y</code></em>);</pre> <p>If the <em class="parameter"><code>gesture</code></em> is active, this function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> and fills in <em class="parameter"><code>x</code></em> and <em class="parameter"><code>y</code></em> with the coordinates of the current point, as an offset to the starting drag point.</p> <div class="refsect3"> <a name="gtk-gesture-drag-get-offset.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>gesture</p></td> <td class="parameter_description"><p>a <a class="link" href="GtkGesture.html" title="GtkGesture"><span class="type">GtkGesture</span></a></p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>x</p></td> <td class="parameter_description"><p>X offset for the current point. </p></td> <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td> </tr> <tr> <td class="parameter_name"><p>y</p></td> <td class="parameter_description"><p>Y offset for the current point. </p></td> <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="gtk-gesture-drag-get-offset.returns"></a><h4>Returns</h4> <p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the gesture is active</p> </div> <p class="since">Since: <a class="link" href="api-index-3-14.html#api-index-3.14">3.14</a></p> </div> </div> <div class="refsect1"> <a name="GtkGestureDrag.other_details"></a><h2>Types and Values</h2> <div class="refsect2"> <a name="GtkGestureDrag-struct"></a><h3>GtkGestureDrag</h3> <pre class="programlisting">typedef struct _GtkGestureDrag GtkGestureDrag;</pre> </div> </div> <div class="refsect1"> <a name="GtkGestureDrag.signal-details"></a><h2>Signal Details</h2> <div class="refsect2"> <a name="GtkGestureDrag-drag-begin"></a><h3>The <code class="literal">“drag-begin”</code> signal</h3> <pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GtkGestureDrag.html" title="GtkGestureDrag"><span class="type">GtkGestureDrag</span></a> *gesture, <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> start_x, <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> start_y, <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre> <p>This signal is emitted whenever dragging starts.</p> <div class="refsect3"> <a name="GtkGestureDrag-drag-begin.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>gesture</p></td> <td class="parameter_description"><p>the object which received the signal</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>start_x</p></td> <td class="parameter_description"><p>X coordinate, relative to the widget allocation</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>start_y</p></td> <td class="parameter_description"><p>Y coordinate, relative to the widget allocation</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>user_data</p></td> <td class="parameter_description"><p>user data set when the signal handler was connected.</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <p>Flags: <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></p> <p class="since">Since: <a class="link" href="api-index-3-14.html#api-index-3.14">3.14</a></p> </div> <hr> <div class="refsect2"> <a name="GtkGestureDrag-drag-end"></a><h3>The <code class="literal">“drag-end”</code> signal</h3> <pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GtkGestureDrag.html" title="GtkGestureDrag"><span class="type">GtkGestureDrag</span></a> *gesture, <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> offset_x, <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> offset_y, <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre> <p>This signal is emitted whenever the dragging is finished.</p> <div class="refsect3"> <a name="GtkGestureDrag-drag-end.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>gesture</p></td> <td class="parameter_description"><p>the object which received the signal</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>offset_x</p></td> <td class="parameter_description"><p>X offset, relative to the start point</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>offset_y</p></td> <td class="parameter_description"><p>Y offset, relative to the start point</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>user_data</p></td> <td class="parameter_description"><p>user data set when the signal handler was connected.</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <p>Flags: <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></p> <p class="since">Since: <a class="link" href="api-index-3-14.html#api-index-3.14">3.14</a></p> </div> <hr> <div class="refsect2"> <a name="GtkGestureDrag-drag-update"></a><h3>The <code class="literal">“drag-update”</code> signal</h3> <pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GtkGestureDrag.html" title="GtkGestureDrag"><span class="type">GtkGestureDrag</span></a> *gesture, <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> offset_x, <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> offset_y, <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre> <p>This signal is emitted whenever the dragging point moves.</p> <div class="refsect3"> <a name="GtkGestureDrag-drag-update.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>gesture</p></td> <td class="parameter_description"><p>the object which received the signal</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>offset_x</p></td> <td class="parameter_description"><p>X offset, relative to the start point</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>offset_y</p></td> <td class="parameter_description"><p>Y offset, relative to the start point</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>user_data</p></td> <td class="parameter_description"><p>user data set when the signal handler was connected.</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <p>Flags: <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></p> <p class="since">Since: <a class="link" href="api-index-3-14.html#api-index-3.14">3.14</a></p> </div> </div> <div class="refsect1"> <a name="GtkGestureDrag.see-also"></a><h2>See Also</h2> <p><a class="link" href="GtkGestureSwipe.html" title="GtkGestureSwipe"><span class="type">GtkGestureSwipe</span></a></p> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.32</div> </body> </html>