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rustdesk
2021-05-23 10:55:19 +08:00
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commit 237e889604
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libs/rust-sciter/examples/threads.htm Normal file
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<html window-icon="https://cdn2.iconfinder.com/data/icons/arts-crafts-sewing/24/sewing_thread_handcraft_craft_1-32.png">
<head>
<title>Threads demo</title>
<style>
div#content { flow:horizontal; size:*; }
div#explanation { size:*; padding:20px; overflow:auto; }
div#explanation > pre { padding:10px; border:1px dotted #999; background:#ffffef; }
div#tasks { width:300px; height:*; }
div#tasks > select { size:*; display:block; }
div#tasks > select progress { margin-left: 5px; }
</style>
<script type="text/tiscript">
var taskNo = 0;
$(#start-task).onClick = function()
{
++taskNo;
var taskElem = $(div#tasks > select).$append(<option>Task { taskNo }<progress max=100 /> <span.result /></option>);
function onProgress(p100) { taskElem.$(progress).value = p100; }
function onDone(taskId) {
taskElem.$(span.result).text = "Done!";
taskElem.$(progress).remove();
}
view.exec_task(taskNo, onProgress, onDone);
}
</script>
</head>
<body>
<h2>Sciter UI, threads demo</h2>
<div id="content">
<div id="tasks">
<button id="start-task">Start Task</button>
<select type="select"></select>
</div>
<div id="explanation">
<p>The Start Task onClick handler is defined as</p>
<pre>
$(#start-task).onClick = function()
{
var taskElem = $(div#tasks > select)
.$append(&lt;option>Task { ++taskNo }
&lt;progress max=100 />
&lt;span.result />&lt;/option>);
function onProgress(p100) {
taskElem.$(progress).value = p100;
}
function onDone(taskId) {
taskElem.$(span.result).text = "Done!";
taskElem.$(progress).remove();
}
view.exec_task(taskId, onProgress, onDone);
}
</pre>
<p>It defines couple of callback functions and calls <code>view.exec_task()</code> with them.</p>
<p>The <code>view.exec_task()</code> native method is implemented in <code>EventHandler::exec_task()</code>.</p>
<p>The <code>EventHandler::exec_task()</code> starts worker thread passing <em>taskNo</em>, <em>onProgress</em> and
<em>onDone</em> parameters to it.</p>
<p>Worker thread body is defined in Rust code as:</p>
<pre>
// worker thread body, simulate time consuming task
fn thread_body(task_no: i32, progress: Value, done: Value)
{
for i in 1..100 {
std::thread::sleep(std::time::Duration::from_millis(100));
progress.call(None, &amp;make_args!(i), None).unwrap(); // report task progress
}
// report task completion,
// we can pass some result data here, for now just taskId
done.call(None, &amp;make_args!(task_no), None).unwrap();
}
</pre>
<p>As you see it calls passed callback functions.</p>
</div>
</div>
</body>
</html>