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<section id="module-tkinter.dnd">
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<span id="tkinter-dnd-drag-and-drop-support"></span><h1><code class="xref py py-mod docutils literal notranslate"><span class="pre">tkinter.dnd</span></code> — Drag and drop support<a class="headerlink" href="#module-tkinter.dnd" title="Link to this heading">¶</a></h1>
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<p><strong>Source code:</strong> <a class="extlink-source reference external" href="https://github.com/python/cpython/tree/3.13/Lib/tkinter/dnd.py">Lib/tkinter/dnd.py</a></p>
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<p class="admonition-title">Note</p>
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<p>This is experimental and due to be deprecated when it is replaced
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with the Tk DND.</p>
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</div>
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<p>The <a class="reference internal" href="#module-tkinter.dnd" title="tkinter.dnd: Tkinter drag-and-drop interface (Tk)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">tkinter.dnd</span></code></a> module provides drag-and-drop support for objects within
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a single application, within the same window or between windows. To enable an
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object to be dragged, you must create an event binding for it that starts the
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drag-and-drop process. Typically, you bind a ButtonPress event to a callback
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function that you write (see <a class="reference internal" href="tkinter.html#bindings-and-events"><span class="std std-ref">Bindings and Events</span></a>). The function should
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call <a class="reference internal" href="#tkinter.dnd.dnd_start" title="tkinter.dnd.dnd_start"><code class="xref py py-func docutils literal notranslate"><span class="pre">dnd_start()</span></code></a>, where ‘source’ is the object to be dragged, and ‘event’
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is the event that invoked the call (the argument to your callback function).</p>
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<p>Selection of a target object occurs as follows:</p>
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<ol class="arabic simple">
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<li><p>Top-down search of area under mouse for target widget</p></li>
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</ol>
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<blockquote>
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<div><ul class="simple">
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<li><p>Target widget should have a callable <em>dnd_accept</em> attribute</p></li>
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<li><p>If <em>dnd_accept</em> is not present or returns <code class="docutils literal notranslate"><span class="pre">None</span></code>, search moves to parent widget</p></li>
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<li><p>If no target widget is found, then the target object is <code class="docutils literal notranslate"><span class="pre">None</span></code></p></li>
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</ul>
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</div></blockquote>
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<ol class="arabic simple" start="2">
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<li><p>Call to <em><old_target>.dnd_leave(source, event)</em></p></li>
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<li><p>Call to <em><new_target>.dnd_enter(source, event)</em></p></li>
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<li><p>Call to <em><target>.dnd_commit(source, event)</em> to notify of drop</p></li>
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<li><p>Call to <em><source>.dnd_end(target, event)</em> to signal end of drag-and-drop</p></li>
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</ol>
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<dl class="py class">
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<dt class="sig sig-object py" id="tkinter.dnd.DndHandler">
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<em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">tkinter.dnd.</span></span><span class="sig-name descname"><span class="pre">DndHandler</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">source</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">event</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#tkinter.dnd.DndHandler" title="Link to this definition">¶</a></dt>
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<dd><p>The <em>DndHandler</em> class handles drag-and-drop events tracking Motion and
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ButtonRelease events on the root of the event widget.</p>
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<dl class="py method">
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<dt class="sig sig-object py" id="tkinter.dnd.DndHandler.cancel">
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<span class="sig-name descname"><span class="pre">cancel</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">event</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#tkinter.dnd.DndHandler.cancel" title="Link to this definition">¶</a></dt>
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<dd><p>Cancel the drag-and-drop process.</p>
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</dd></dl>
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<dl class="py method">
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<dt class="sig sig-object py" id="tkinter.dnd.DndHandler.finish">
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<span class="sig-name descname"><span class="pre">finish</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">event</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">commit</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">0</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#tkinter.dnd.DndHandler.finish" title="Link to this definition">¶</a></dt>
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<dd><p>Execute end of drag-and-drop functions.</p>
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</dd></dl>
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<dl class="py method">
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<dt class="sig sig-object py" id="tkinter.dnd.DndHandler.on_motion">
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<span class="sig-name descname"><span class="pre">on_motion</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">event</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#tkinter.dnd.DndHandler.on_motion" title="Link to this definition">¶</a></dt>
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<dd><p>Inspect area below mouse for target objects while drag is performed.</p>
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</dd></dl>
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<dl class="py method">
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<dt class="sig sig-object py" id="tkinter.dnd.DndHandler.on_release">
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<span class="sig-name descname"><span class="pre">on_release</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">event</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#tkinter.dnd.DndHandler.on_release" title="Link to this definition">¶</a></dt>
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<dd><p>Signal end of drag when the release pattern is triggered.</p>
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</dd></dl>
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</dd></dl>
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<dl class="py function">
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<dt class="sig sig-object py" id="tkinter.dnd.dnd_start">
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<span class="sig-prename descclassname"><span class="pre">tkinter.dnd.</span></span><span class="sig-name descname"><span class="pre">dnd_start</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">source</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">event</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#tkinter.dnd.dnd_start" title="Link to this definition">¶</a></dt>
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<dd><p>Factory function for drag-and-drop process.</p>
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</dd></dl>
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<div class="admonition seealso">
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<p class="admonition-title">See also</p>
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<p><a class="reference internal" href="tkinter.html#bindings-and-events"><span class="std std-ref">Bindings and Events</span></a></p>
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|
||
</div>
|
||
|
|
||
</li>
|
||
<li class="right">
|
||
<label class="theme-selector-label">
|
||
Theme
|
||
<select class="theme-selector" oninput="activateTheme(this.value)">
|
||
<option value="auto" selected>Auto</option>
|
||
<option value="light">Light</option>
|
||
<option value="dark">Dark</option>
|
||
</select>
|
||
</label> |</li>
|
||
|
||
</ul>
|
||
</div>
|
||
<div class="footer">
|
||
©
|
||
<a href="../copyright.html">
|
||
|
||
Copyright
|
||
|
||
</a>
|
||
2001-2025, Python Software Foundation.
|
||
<br />
|
||
This page is licensed under the Python Software Foundation License Version 2.
|
||
<br />
|
||
Examples, recipes, and other code in the documentation are additionally licensed under the Zero Clause BSD License.
|
||
<br />
|
||
|
||
See <a href="/license.html">History and License</a> for more information.<br />
|
||
|
||
|
||
<br />
|
||
|
||
The Python Software Foundation is a non-profit corporation.
|
||
<a href="https://www.python.org/psf/donations/">Please donate.</a>
|
||
<br />
|
||
<br />
|
||
Last updated on Apr 08, 2025 (14:33 UTC).
|
||
|
||
<a href="/bugs.html">Found a bug</a>?
|
||
|
||
<br />
|
||
|
||
Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 8.2.3.
|
||
</div>
|
||
|
||
</body>
|
||
</html> |