A simple, extensible VPL based around a plugin architecture.
Install the "CaptiveAire.VPL" nuget package.
//Create the system plugins
var plugins = SystemPluginFactory.CreateAllPlugins();
//Create the vplService
var vplService = new VplService(plugins);To edit / run a function:
//Create new function metadata
var functionMetadata = new FunctionMetadata()
{
Id = Guid.NewGuid(),
Name = "My Function"
};
//Edit the function (providing an action that will persist the function)
vplService.EditFunction(functionMetadata, f => SaveFunction(f))To call functions, you must provide an implementation of IFunctionService and include this in your plugin services.
There is no default implementation of IFunctionService
Plugins can provide the following:
- Custom Elements
- Custom data types (via the IVplType interface / VplType class)
- Provide WPF resources such as styles and control templates.
A simple 'Alert' statement:
public class Alert : Statement
{
private readonly IParameter _messageParameter;
public Alert(IElementCreationContext context) : base(context)
{
_messageParameter = context.Owner.CreateParameter("message", context.Owner.GetStringType());
Parameters.Add(_messageParameter);
}
public override object Label
{
get { return "Alert"; }
set { }
}
protected override async Task ExecuteCoreAsync(CancellationToken cancellationToken)
{
var message = await _messageParameter.EvaluateAsync(cancellationToken) as string;
MessageBox.Show(message);
}
}Then, create the plugin:
var alertPlugin = new VplPlugin("Alert",
new IElementFactory[]
{
new ElementFactory(
new Guid("FBB6804C-B90C-4A88-B28B-8B733C1A9F0D"),
"Interaction",
"Alert",
context => new Alert(context),
typeof(Alert)),
});Add this to the list of plugins when creating the vpl sevice.
//Create the system plugins
var plugins = SystemPluginFactory.CreateAllPlugins().ToList();
plugins.Add(alertPlugin)
//Create the vplService
var vplService = new VplService(plugins);Now, drag out an Alert statement and add some text for the message:
