// Register sync method without communicating with Formium object.
private JavaScriptValue Add(JavaScriptValue[] arguments)
{
if (arguments.Length == 2)
{
var retval = arguments[0].GetDouble() + arguments[1].GetDouble();
return(JavaScriptValue.CreateNumber(retval));
}
return(JavaScriptValue.CreateNull());
}
// Example: Map the CLR objects to NanUI's JavaScript context.
private void MapClrObjectToJavaScript()
{
var obj = JavaScriptValue.CreateObject();
// Readonly property
obj.SetValue("now", JavaScriptValue.CreateProperty(() =>
{
return(JavaScriptValue.CreateDateTime(DateTime.Now));
}));
// Value
obj.SetValue("version", JavaScriptValue.CreateString(Assembly.GetExecutingAssembly().GetName().Version?.ToString()));
// Readable and writable property
obj.SetValue("subtitle", JavaScriptValue.CreateProperty(() => JavaScriptValue.CreateString(Subtitle), title => Subtitle = title.GetString()));
// Sync method
obj.SetValue("messagebox", JavaScriptValue.CreateFunction(args =>
{
var msg = args.FirstOrDefault(x => x.IsString);
var text = msg?.GetString();
InvokeIfRequired(() =>
{
MessageBox.Show(HostWindow, text, "Message from JS", MessageBoxButtons.OK, MessageBoxIcon.Information);
});
return(JavaScriptValue.CreateString(text));
}));
// Async method
obj.SetValue("asyncmethod", JavaScriptValue.CreateFunction((args, callback) =>
{
Task.Run(async() =>
{
var rnd = new Random(DateTime.Now.Millisecond);
var rndValue = rnd.Next(1000, 2000);
await Task.Delay(rndValue);
var obj = JavaScriptValue.CreateObject();
obj.SetValue("delayed", JavaScriptValue.CreateNumber(rndValue));
obj.SetValue("message", JavaScriptValue.CreateString($"Delayed {rndValue} milliseconds"));
callback.Success(obj);
});
}));
RegisterExternalObjectValue("tester", obj);
}
private JavaScriptValue GetCultureInfo(Formium owner, JavaScriptValue[] arguments)
{
var retval = JavaScriptValue.CreateObject();
retval.SetValue("name", JavaScriptValue.CreateString($"{Thread.CurrentThread.CurrentCulture.Name}"));
retval.SetValue("displayName", JavaScriptValue.CreateString($"{Thread.CurrentThread.CurrentCulture.DisplayName}"));
retval.SetValue("englishName", JavaScriptValue.CreateString($"{Thread.CurrentThread.CurrentCulture.EnglishName}"));
retval.SetValue("lcid", JavaScriptValue.CreateNumber(Thread.CurrentThread.CurrentCulture.LCID));
return(retval);
}
private JavaScriptValue GetWindowRectangle(Formium owner, JavaScriptValue[] arguments)
{
var retval = JavaScriptValue.CreateObject();
var rect = new RECT();
User32.GetWindowRect(owner.HostWindowHandle, ref rect);
retval.SetValue("x", JavaScriptValue.CreateNumber(rect.left));
retval.SetValue("y", JavaScriptValue.CreateNumber(rect.top));
retval.SetValue("width", JavaScriptValue.CreateNumber(rect.Width));
retval.SetValue("height", JavaScriptValue.CreateNumber(rect.Height));
return(retval);
}
