<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- draganddrop.qdoc --> <title>Qt Quick Examples - Drag and Drop | Qt Quick 5.9</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.9</td><td ><a href="qtquick-index.html">Qt Quick</a></td><td >Qt Quick Examples - Drag and Drop</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#running-the-example">Running the Example</a></li> <li class="level1"><a href="#tiles">Tiles</a></li> <li class="level1"><a href="#gridview-example">GridView Example</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">Qt Quick Examples - Drag and Drop</h1> <span class="subtitle"></span> <!-- $$$draganddrop-description --> <div class="descr"> <a name="details"></a> <p class="centerAlign"><img src="images/qml-draganddrop-example.png" alt="" /></p><p><i>Drag and Drop</i> is a collection of small QML examples relating to the drag and drop functionality. For more information, visit the Drag and Drop page.</p> <a name="running-the-example"></a> <h2 id="running-the-example">Running the Example</h2> <p>To run the example from Qt Creator, open the <b>Welcome</b> mode and select the example from <b>Examples</b>. For more information, visit Building and Running an Example.</p> <a name="tiles"></a> <h2 id="tiles">Tiles</h2> <p><i>Tiles</i> adds drag and drop to simple rectangles, which you can drag into a specific grid.</p> <p>It has a DragTile component which uses a <a href="qml-qtquick-mousearea.html">MouseArea</a> to move an item when dragged:</p> <pre class="qml"> <span class="type"><a href="qml-qtquick-item.html">Item</a></span> { <span class="name">id</span>: <span class="name">root</span> property <span class="type">string</span> <span class="name">colorKey</span> <span class="name">width</span>: <span class="number">64</span>; <span class="name">height</span>: <span class="number">64</span> <span class="type"><a href="qml-qtquick-mousearea.html">MouseArea</a></span> { <span class="name">id</span>: <span class="name">mouseArea</span> <span class="name">width</span>: <span class="number">64</span>; <span class="name">height</span>: <span class="number">64</span> <span class="name">anchors</span>.centerIn: <span class="name">parent</span> <span class="name">drag</span>.target: <span class="name">tile</span> <span class="name">onReleased</span>: <span class="name">parent</span> <span class="operator">=</span> <span class="name">tile</span>.<span class="name">Drag</span>.<span class="name">target</span> <span class="operator">!==</span> <span class="number">null</span> ? <span class="name">tile</span>.<span class="name">Drag</span>.<span class="name">target</span> : <span class="name">root</span> <span class="type"><a href="qml-qtquick-rectangle.html">Rectangle</a></span> { <span class="name">id</span>: <span class="name">tile</span> <span class="name">width</span>: <span class="number">64</span>; <span class="name">height</span>: <span class="number">64</span> <span class="name">anchors</span>.verticalCenter: <span class="name">parent</span>.<span class="name">verticalCenter</span> <span class="name">anchors</span>.horizontalCenter: <span class="name">parent</span>.<span class="name">horizontalCenter</span> <span class="name">color</span>: <span class="name">colorKey</span> <span class="name">Drag</span>.keys: [ <span class="name">colorKey</span> ] <span class="name">Drag</span>.active: <span class="name">mouseArea</span>.<span class="name">drag</span>.<span class="name">active</span> <span class="name">Drag</span>.hotSpot.x: <span class="number">32</span> <span class="name">Drag</span>.hotSpot.y: <span class="number">32</span> <span class="name">states</span>: <span class="name">State</span> { <span class="name">when</span>: <span class="name">mouseArea</span>.<span class="name">drag</span>.<span class="name">active</span> <span class="type"><a href="qml-qtquick-parentchange.html">ParentChange</a></span> { <span class="name">target</span>: <span class="name">tile</span>; <span class="name">parent</span>: <span class="name">root</span> } <span class="type"><a href="qml-qtquick-anchorchanges.html">AnchorChanges</a></span> { <span class="name">target</span>: <span class="name">tile</span>; <span class="name">anchors</span>.verticalCenter: <span class="name">undefined</span>; <span class="name">anchors</span>.horizontalCenter: <span class="name">undefined</span> } } } } } </pre> <p>And a DropTile component on which the dragged tiles can be dropped:</p> <pre class="qml"> <span class="type"><a href="qml-qtquick-droparea.html">DropArea</a></span> { <span class="name">id</span>: <span class="name">dragTarget</span> property <span class="type">string</span> <span class="name">colorKey</span> property <span class="type">alias</span> <span class="name">dropProxy</span>: <span class="name">dragTarget</span> <span class="name">width</span>: <span class="number">64</span>; <span class="name">height</span>: <span class="number">64</span> <span class="name">keys</span>: [ <span class="name">colorKey</span> ] <span class="type"><a href="qml-qtquick-rectangle.html">Rectangle</a></span> { <span class="name">id</span>: <span class="name">dropRectangle</span> <span class="name">anchors</span>.fill: <span class="name">parent</span> <span class="name">color</span>: <span class="name">colorKey</span> <span class="name">states</span>: [ <span class="type"><a href="qml-qtquick-state.html">State</a></span> { <span class="name">when</span>: <span class="name">dragTarget</span>.<span class="name">containsDrag</span> <span class="type"><a href="qml-qtquick-propertychanges.html">PropertyChanges</a></span> { <span class="name">target</span>: <span class="name">dropRectangle</span> <span class="name">color</span>: <span class="string">"grey"</span> } } ] } } </pre> <p>The keys property of the <a href="qml-qtquick-droparea.html">DropArea</a> will only allow an item to be dropped on it if it has a matching key in its Drag.keys property.</p> <a name="gridview-example"></a> <h2 id="gridview-example">GridView Example</h2> <p>The <i><a href="qml-qtquick-gridview.html">GridView</a> Example</i> adds drag and drop to a <a href="qml-qtquick-gridview.html">GridView</a>, allowing you to reorder the list. It also uses a DelegateModel to move a delegate item to the position of another item it is dragged over.</p> <pre class="qml"> <span class="name">model</span>: <span class="name">DelegateModel</span> { <span class="name">delegate</span>: <span class="name">MouseArea</span> { <span class="name">id</span>: <span class="name">delegateRoot</span> property <span class="type">int</span> <span class="name">visualIndex</span>: <span class="name">DelegateModel</span>.<span class="name">itemsIndex</span> <span class="name">width</span>: <span class="number">80</span>; <span class="name">height</span>: <span class="number">80</span> <span class="name">drag</span>.target: <span class="name">icon</span> <span class="type"><a href="qml-qtquick-rectangle.html">Rectangle</a></span> { <span class="name">id</span>: <span class="name">icon</span> <span class="name">width</span>: <span class="number">72</span>; <span class="name">height</span>: <span class="number">72</span> <span class="type">anchors</span> { <span class="name">horizontalCenter</span>: <span class="name">parent</span>.<span class="name">horizontalCenter</span>; <span class="name">verticalCenter</span>: <span class="name">parent</span>.<span class="name">verticalCenter</span> } <span class="name">color</span>: <span class="name">model</span>.<span class="name">color</span> <span class="name">radius</span>: <span class="number">3</span> <span class="name">Drag</span>.active: <span class="name">delegateRoot</span>.<span class="name">drag</span>.<span class="name">active</span> <span class="name">Drag</span>.source: <span class="name">delegateRoot</span> <span class="name">Drag</span>.hotSpot.x: <span class="number">36</span> <span class="name">Drag</span>.hotSpot.y: <span class="number">36</span> <span class="name">states</span>: [ <span class="type"><a href="qml-qtquick-state.html">State</a></span> { <span class="name">when</span>: <span class="name">icon</span>.<span class="name">Drag</span>.<span class="name">active</span> <span class="type"><a href="qml-qtquick-parentchange.html">ParentChange</a></span> { <span class="name">target</span>: <span class="name">icon</span> <span class="name">parent</span>: <span class="name">root</span> } <span class="type"><a href="qml-qtquick-anchorchanges.html">AnchorChanges</a></span> { <span class="name">target</span>: <span class="name">icon</span>; <span class="name">anchors</span>.horizontalCenter: <span class="name">undefined</span>; <span class="name">anchors</span>.verticalCenter: <span class="name">undefined</span> } } ] } <span class="type"><a href="qml-qtquick-droparea.html">DropArea</a></span> { <span class="type">anchors</span> { <span class="name">fill</span>: <span class="name">parent</span>; <span class="name">margins</span>: <span class="number">15</span> } <span class="name">onEntered</span>: <span class="name">visualModel</span>.<span class="name">items</span>.<span class="name">move</span>(<span class="name">drag</span>.<span class="name">source</span>.<span class="name">visualIndex</span>, <span class="name">delegateRoot</span>.<span class="name">visualIndex</span>) } } </pre> <p>Files:</p> <ul> <li><a href="qtquick-draganddrop-draganddrop-qml.html">draganddrop/draganddrop.qml</a></li> <li><a href="qtquick-draganddrop-tiles-dragtile-qml.html">draganddrop/tiles/DragTile.qml</a></li> <li><a href="qtquick-draganddrop-tiles-droptile-qml.html">draganddrop/tiles/DropTile.qml</a></li> <li><a href="qtquick-draganddrop-tiles-tiles-qml.html">draganddrop/tiles/tiles.qml</a></li> <li><a href="qtquick-draganddrop-views-gridview-qml.html">draganddrop/views/gridview.qml</a></li> <li><a href="qtquick-draganddrop-main-cpp.html">draganddrop/main.cpp</a></li> <li><a href="qtquick-draganddrop-draganddrop-pro.html">draganddrop/draganddrop.pro</a></li> <li><a href="qtquick-draganddrop-draganddrop-qmlproject.html">draganddrop/draganddrop.qmlproject</a></li> <li><a href="qtquick-draganddrop-draganddrop-qrc.html">draganddrop/draganddrop.qrc</a></li> </ul> </div> <!-- @@@draganddrop --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>