<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>itemCreation.js Example File | Qt QML 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="qtqml-index.html">Qt QML</a></td><td ><a href="qtqml-dynamicscene-example.html">QML Example - Dynamic Scene</a></td><td >itemCreation.js Example File</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="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">itemCreation.js Example File</h1> <span class="subtitle">dynamicscene/content/itemCreation.js</span> <!-- $$$dynamicscene/content/itemCreation.js-description --> <div class="descr"> <a name="details"></a> <pre class="js"> var <span class="name">itemComponent</span> = <span class="number">null</span>; var <span class="name">draggedItem</span> = <span class="number">null</span>; var <span class="name">startingMouse</span>; var <span class="name">posnInWindow</span>; <span class="keyword">function</span> <span class="name">startDrag</span>(<span class="name">mouse</span>) { <span class="name">posnInWindow</span> <span class="operator">=</span> <span class="name">paletteItem</span>.<span class="name">mapToItem</span>(<span class="name">window</span>, <span class="number">0</span>, <span class="number">0</span>); <span class="name">startingMouse</span> <span class="operator">=</span> { x: <span class="name">mouse</span>.<span class="name">x</span>, y: <span class="name">mouse</span>.<span class="name">y</span> } <span class="name">loadComponent</span>(); } <span class="comment">//Creation is split into two functions due to an asynchronous wait while</span> <span class="comment">//possible external files are loaded.</span> <span class="keyword">function</span> <span class="name">loadComponent</span>() { <span class="keyword">if</span> (<span class="name">itemComponent</span> <span class="operator">!=</span> <span class="number">null</span>) { <span class="comment">// component has been previously loaded</span> <span class="name">createItem</span>(); <span class="keyword">return</span>; } <span class="name">itemComponent</span> <span class="operator">=</span> <span class="name">Qt</span>.<span class="name">createComponent</span>(<span class="name">paletteItem</span>.<span class="name">componentFile</span>); <span class="keyword">if</span> (<span class="name">itemComponent</span>.<span class="name">status</span> <span class="operator">==</span> <span class="name">Component</span>.<span class="name">Loading</span>) <span class="comment">//Depending on the content, it can be ready or error immediately</span> <span class="name">component</span>.<span class="name">statusChanged</span>.<span class="name">connect</span>(<span class="name">createItem</span>); <span class="keyword">else</span> <span class="name">createItem</span>(); } <span class="keyword">function</span> <span class="name">createItem</span>() { <span class="keyword">if</span> (<span class="name">itemComponent</span>.<span class="name">status</span> <span class="operator">==</span> <span class="name">Component</span>.<span class="name">Ready</span> <span class="operator">&&</span> <span class="name">draggedItem</span> <span class="operator">==</span> <span class="number">null</span>) { <span class="name">draggedItem</span> <span class="operator">=</span> <span class="name">itemComponent</span>.<span class="name">createObject</span>(<span class="name">window</span>, {"image": <span class="name">paletteItem</span>.<span class="name">image</span>, "x": <span class="name">posnInWindow</span>.<span class="name">x</span>, "y": <span class="name">posnInWindow</span>.<span class="name">y</span>, "z": <span class="number">3</span>}); <span class="comment">// make sure created item is above the ground layer</span> } <span class="keyword">else</span> <span class="keyword">if</span> (<span class="name">itemComponent</span>.<span class="name">status</span> <span class="operator">==</span> <span class="name">Component</span>.<span class="name">Error</span>) { <span class="name">draggedItem</span> <span class="operator">=</span> <span class="number">null</span>; <span class="name">console</span>.<span class="name">log</span>(<span class="string">"error creating component"</span>); <span class="name">console</span>.<span class="name">log</span>(<span class="name">itemComponent</span>.<span class="name">errorString</span>()); } } <span class="keyword">function</span> <span class="name">continueDrag</span>(<span class="name">mouse</span>) { <span class="keyword">if</span> (<span class="name">draggedItem</span> <span class="operator">==</span> <span class="number">null</span>) <span class="keyword">return</span>; <span class="name">draggedItem</span>.<span class="name">x</span> <span class="operator">=</span> <span class="name">mouse</span>.<span class="name">x</span> <span class="operator">+</span> <span class="name">posnInWindow</span>.<span class="name">x</span> <span class="operator">-</span> <span class="name">startingMouse</span>.<span class="name">x</span>; <span class="name">draggedItem</span>.<span class="name">y</span> <span class="operator">=</span> <span class="name">mouse</span>.<span class="name">y</span> <span class="operator">+</span> <span class="name">posnInWindow</span>.<span class="name">y</span> <span class="operator">-</span> <span class="name">startingMouse</span>.<span class="name">y</span>; } <span class="keyword">function</span> <span class="name">endDrag</span>(<span class="name">mouse</span>) { <span class="keyword">if</span> (<span class="name">draggedItem</span> <span class="operator">==</span> <span class="number">null</span>) <span class="keyword">return</span>; <span class="keyword">if</span> (<span class="name">draggedItem</span>.<span class="name">y</span> <span class="operator"><</span> <span class="name">toolbox</span>.<span class="name">height</span>) { <span class="comment">//Don't drop it in the toolbox</span> <span class="name">draggedItem</span>.<span class="name">destroy</span>(); <span class="name">draggedItem</span> <span class="operator">=</span> <span class="number">null</span>; } <span class="keyword">else</span> { <span class="name">draggedItem</span>.<span class="name">created</span> <span class="operator">=</span> <span class="number">true</span>; <span class="name">draggedItem</span> <span class="operator">=</span> <span class="number">null</span>; } } </pre> </div> <!-- @@@dynamicscene/content/itemCreation.js --> </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>