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+<title>QDragObject Class</title>
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+<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QDragObject Class Reference</h1>
+
+<p>The QDragObject class encapsulates MIME-based data
+transfer.
+<a href="#details">More...</a>
+<p><tt>#include &lt;<a href="qdragobject-h.html">qdragobject.h</a>&gt;</tt>
+<p>Inherits <a href="qobject.html">QObject</a> and <a href="qmimesource.html">QMimeSource</a>.
+<p>Inherited by <a href="qstoreddrag.html">QStoredDrag</a>, <a href="qtextdrag.html">QTextDrag</a>, <a href="qimagedrag.html">QImageDrag</a>, and <a href="qicondrag.html">QIconDrag</a>.
+<p><a href="qdragobject-members.html">List of all member functions.</a>
+<h2>Public Members</h2>
+<ul>
+<li class=fn><a href="#QDragObject"><b>QDragObject</b></a> ( QWidget&nbsp;*&nbsp;dragSource = 0, const&nbsp;char&nbsp;*&nbsp;name = 0 )</li>
+<li class=fn>virtual <a href="#~QDragObject"><b>~QDragObject</b></a> ()</li>
+<li class=fn>bool <a href="#drag"><b>drag</b></a> ()</li>
+<li class=fn>bool <a href="#dragMove"><b>dragMove</b></a> ()</li>
+<li class=fn>void <a href="#dragCopy"><b>dragCopy</b></a> ()</li>
+<li class=fn>void <a href="#dragLink"><b>dragLink</b></a> ()</li>
+<li class=fn>virtual void <a href="#setPixmap-2"><b>setPixmap</b></a> ( QPixmap&nbsp;pm )</li>
+<li class=fn>virtual void <a href="#setPixmap"><b>setPixmap</b></a> ( QPixmap&nbsp;pm, const&nbsp;QPoint&nbsp;&amp;&nbsp;hotspot )</li>
+<li class=fn>QPixmap <a href="#pixmap"><b>pixmap</b></a> () const</li>
+<li class=fn>QPoint <a href="#pixmapHotSpot"><b>pixmapHotSpot</b></a> () const</li>
+<li class=fn>QWidget * <a href="#source"><b>source</b></a> ()</li>
+<li class=fn>enum <a href="#DragMode-enum"><b>DragMode</b></a> { DragDefault, DragCopy, DragMove, DragLink, DragCopyOrMove }</li>
+</ul>
+<h2>Static Public Members</h2>
+<ul>
+<li class=fn>QWidget * <a href="#target"><b>target</b></a> ()</li>
+</ul>
+<h2>Protected Members</h2>
+<ul>
+<li class=fn>virtual bool <a href="#drag-2"><b>drag</b></a> ( DragMode&nbsp;mode )</li>
+</ul>
+<hr><a name="details"></a><h2>Detailed Description</h2>
+
+
+<p> The QDragObject class encapsulates MIME-based data
+transfer.
+<p>
+<p> QDragObject is the base class for all data that needs to be
+transferred between and within applications, both for drag and
+drop and for the <a href="qclipboard.html">clipboard</a>.
+<p> See the <a href="dnd.html">Drag-and-drop documentation</a> for an
+overview of how to provide drag and drop in your application.
+<p> See the <a href="qclipboard.html">QClipboard</a> documentation for an overview of how to provide
+cut-and-paste in your application.
+<p> The <a href="#drag">drag</a>() function is used to start a drag operation. You can
+specify the <a href="#DragMode-enum">DragMode</a> in the call or use one of the convenience
+functions <a href="#dragCopy">dragCopy</a>(), <a href="#dragMove">dragMove</a>() or <a href="#dragLink">dragLink</a>(). The drag source
+where the data originated is retrieved with <a href="#source">source</a>(). If the data
+was dropped on a widget within the application, <a href="#target">target</a>() will
+return a pointer to that widget. Specify the pixmap to display
+during the drag with <a href="#setPixmap">setPixmap</a>().
+<p>See also <a href="draganddrop.html">Drag And Drop Classes</a>.
+
+<hr><h2>Member Type Documentation</h2>
+<h3 class=fn><a name="DragMode-enum"></a>QDragObject::DragMode</h3>
+
+<p> This enum describes the possible drag modes.
+<ul>
+<li><tt>QDragObject::DragDefault</tt> - The mode is determined heuristically.
+<li><tt>QDragObject::DragCopy</tt> - The data is copied, never moved.
+<li><tt>QDragObject::DragMove</tt> - The data is moved, if dragged at all.
+<li><tt>QDragObject::DragLink</tt> - The data is linked, if dragged at all.
+<li><tt>QDragObject::DragCopyOrMove</tt> - The user chooses the mode by using a
+control key to switch from the default.
+</ul>
+<hr><h2>Member Function Documentation</h2>
+<h3 class=fn><a name="QDragObject"></a>QDragObject::QDragObject ( <a href="qwidget.html">QWidget</a>&nbsp;*&nbsp;dragSource = 0, const&nbsp;char&nbsp;*&nbsp;name = 0 )
+</h3>
+Constructs a drag object called <em>name</em>, which is a child of <em>dragSource</em>.
+<p> Note that the drag object will be deleted when <em>dragSource</em> is
+deleted.
+
+<h3 class=fn><a name="~QDragObject"></a>QDragObject::~QDragObject ()<tt> [virtual]</tt>
+</h3>
+Destroys the drag object, canceling any drag and drop operation in
+which it is involved, and frees up the storage used.
+
+<h3 class=fn>bool <a name="drag"></a>QDragObject::drag ()
+</h3>
+Starts a drag operation using the contents of this object, using
+DragDefault mode.
+<p> The function returns TRUE if the caller should delete the original
+copy of the dragged data (but see <a href="#target">target</a>()); otherwise returns
+FALSE.
+<p> If the drag contains <em>references</em> to information (e.g. file names
+in a <a href="quridrag.html">QUriDrag</a> are references) then the return value should always
+be ignored, as the target is expected to manipulate the
+referred-to content directly. On X11 the return value should
+always be correct anyway, but on Windows this is not necessarily
+the case (e.g. the file manager starts a background process to
+move files, so the source <em>must not</em> delete the files!)
+<p> Note that on Windows the drag operation will spin a blocking modal
+event loop that will not dispatch any QTimers.
+
+<p>Example: <a href="dirview-example.html#x1670">dirview/dirview.cpp</a>.
+<h3 class=fn>bool <a name="drag-2"></a>QDragObject::drag ( <a href="qdragobject.html#DragMode-enum">DragMode</a>&nbsp;mode )<tt> [virtual protected]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Starts a drag operation using the contents of this object.
+<p> At this point, the object becomes owned by Qt, not the
+application. You should not delete the drag object or anything it
+references. The actual transfer of data to the target application
+will be done during future event processing - after that time the
+drag object will be deleted.
+<p> Returns TRUE if the dragged data was dragged as a <em>move</em>,
+indicating that the caller should remove the original source of
+the data (the drag object must continue to have a copy); otherwise
+returns FALSE.
+<p> The <em>mode</em> specifies the drag mode (see
+<a href="#DragMode-enum">QDragObject::DragMode</a>.) Normally one of the simpler <a href="#drag">drag</a>(),
+<a href="#dragMove">dragMove</a>(), or <a href="#dragCopy">dragCopy</a>() functions would be used instead.
+
+<h3 class=fn>void <a name="dragCopy"></a>QDragObject::dragCopy ()
+</h3>
+Starts a drag operation using the contents of this object, using
+<a href="#DragMode-enum">DragCopy</a> mode. Be sure to read the constraints described in
+<a href="#drag">drag</a>().
+<p> <p>See also <a href="#drag">drag</a>(), <a href="#dragMove">dragMove</a>(), and <a href="#dragLink">dragLink</a>().
+
+<p>Example: <a href="simple_dd-example.html#x2818">iconview/simple_dd/main.cpp</a>.
+<h3 class=fn>void <a name="dragLink"></a>QDragObject::dragLink ()
+</h3>
+Starts a drag operation using the contents of this object, using
+<a href="#DragMode-enum">DragLink</a> mode. Be sure to read the constraints described in
+<a href="#drag">drag</a>().
+<p> <p>See also <a href="#drag">drag</a>(), <a href="#dragCopy">dragCopy</a>(), and <a href="#dragMove">dragMove</a>().
+
+<h3 class=fn>bool <a name="dragMove"></a>QDragObject::dragMove ()
+</h3>
+Starts a drag operation using the contents of this object, using
+<a href="#DragMode-enum">DragMove</a> mode. Be sure to read the constraints described in
+<a href="#drag">drag</a>().
+<p> <p>See also <a href="#drag">drag</a>(), <a href="#dragCopy">dragCopy</a>(), and <a href="#dragLink">dragLink</a>().
+
+<h3 class=fn><a href="qpixmap.html">QPixmap</a> <a name="pixmap"></a>QDragObject::pixmap () const
+</h3>
+Returns the currently set pixmap (which <a href="qpixmap.html#isNull">isNull()</a> if none is set).
+
+<h3 class=fn><a href="qpoint.html">QPoint</a> <a name="pixmapHotSpot"></a>QDragObject::pixmapHotSpot () const
+</h3>
+Returns the currently set pixmap hotspot.
+
+<h3 class=fn>void <a name="setPixmap"></a>QDragObject::setPixmap ( <a href="qpixmap.html">QPixmap</a>&nbsp;pm, const&nbsp;<a href="qpoint.html">QPoint</a>&nbsp;&amp;&nbsp;hotspot )<tt> [virtual]</tt>
+</h3>
+Set the pixmap <em>pm</em> to display while dragging the object. The
+platform-specific implementation will use this where it can - so
+provide a small masked pixmap, and do not assume that the user
+will actually see it. For example, cursors on Windows 95 are of
+limited size.
+<p> The <em>hotspot</em> is the point on (or off) the pixmap that should be
+under the cursor as it is dragged. It is relative to the top-left
+pixel of the pixmap.
+<p> <b>Warning:</b> We have seen problems with drag cursors on different
+graphics hardware and driver software on Windows. Setting the
+graphics acceleration in the display settings down one tick solved
+the problems in all cases.
+
+<p>Example: <a href="fileiconview-example.html#x815">fileiconview/qfileiconview.cpp</a>.
+<h3 class=fn>void <a name="setPixmap-2"></a>QDragObject::setPixmap ( <a href="qpixmap.html">QPixmap</a>&nbsp;pm )<tt> [virtual]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Uses a hotspot that positions the pixmap below and to the right of
+the mouse pointer. This allows the user to clearly see the point
+on the window which they are dragging the data onto.
+
+<h3 class=fn><a href="qwidget.html">QWidget</a>&nbsp;* <a name="source"></a>QDragObject::source ()
+</h3>
+Returns a pointer to the drag source where this object originated.
+
+<h3 class=fn><a href="qwidget.html">QWidget</a>&nbsp;* <a name="target"></a>QDragObject::target ()<tt> [static]</tt>
+</h3>
+After the drag completes, this function will return the <a href="qwidget.html">QWidget</a>
+which received the drop, or 0 if the data was dropped on another
+application.
+<p> This can be useful for detecting the case where drag and drop is
+to and from the same widget.
+
+<!-- eof -->
+<hr><p>
+This file is part of the <a href="index.html">Qt toolkit</a>.
+Copyright &copy; 1995-2007
+<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
+<table width=100% cellspacing=0 border=0><tr>
+<td>Copyright &copy; 2007
+<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
+<td align=right><div align=right>Qt 3.3.8</div>
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+</html>