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50 lines
1.5 KiB
C#
50 lines
1.5 KiB
C#
//
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// BindingHelper.cs: Utility methods to make creating
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// element bindings by hand an easier task
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//
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// Authors:
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// Aaron Bockover (abockover@novell.com)
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//
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// Copyright (C) 2006 Novell, Inc.
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//
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using System;
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using GLib;
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namespace Gst {
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public static class BindingHelper {
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public static Delegate AddProxySignalDelegate (Element element, string signal,
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DynamicSignalHandler baseHandler, Delegate existingHandler, Delegate addHandler) {
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if (existingHandler == null) {
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element.Connect (signal, baseHandler);
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}
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return Delegate.Combine (existingHandler, addHandler);
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}
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public static Delegate RemoveProxySignalDelegate (Element element, string signal,
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DynamicSignalHandler baseHandler, Delegate existingHandler, Delegate removeHandler) {
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Delegate temp_delegate = Delegate.Remove (existingHandler, removeHandler);
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if (temp_delegate == null) {
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element.Disconnect (signal, baseHandler);
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}
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return temp_delegate;
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}
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public static void InvokeProxySignalDelegate (Delegate raiseDelegate, Type type,
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object o, GLib.SignalArgs args) {
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if (!type.IsSubclassOf (typeof (GLib.SignalArgs))) {
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throw new ArgumentException ("Args type must derive SignalArgs");
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}
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if (raiseDelegate != null) {
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GLib.SignalArgs new_args = (GLib.SignalArgs) Activator.CreateInstance (type);
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new_args.RetVal = args.RetVal;
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new_args.Args = args.Args;
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raiseDelegate.DynamicInvoke (new object [] { o, new_args });
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}
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}
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}
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}
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