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120 lines
3.5 KiB
C#
120 lines
3.5 KiB
C#
//
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// Authors:
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// Andrés G. Aragoneses <knocte@gmail.com>
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// Sebastian Dröge <slomo@circular-chaos.org>
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// Stephan Sundermann <stephansundermann@gmail.com>
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//
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// Copyright (c) 2009 Sebastian Dröge
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// Copyright (c) 2013 Andrés G. Aragoneses
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// Copyright (C) 2013 Stephan Sundermann
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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// 02110-1301 USA
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using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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namespace Gst {
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public class PropertyNotFoundException : Exception { }
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[StructLayout(LayoutKind.Sequential)]
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struct GstObject {
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IntPtr _lock;
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public string name;
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public Object parent;
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public uint flags;
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IntPtr controlBindings;
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public int control_rate;
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public int last_sync;
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private IntPtr[] _gstGstReserved;
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}
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partial class Object {
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private Dictionary<string, bool> PropertyNameCache = new Dictionary<string, bool>();
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[DllImport("gobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern IntPtr g_object_class_find_property(IntPtr klass, IntPtr name);
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bool PropertyExists(string name) {
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if (PropertyNameCache.ContainsKey(name))
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return PropertyNameCache[name];
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IntPtr native_name = GLib.Marshaller.StringToPtrGStrdup(name);
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var ptr = g_object_class_find_property(Marshal.ReadIntPtr(Handle), native_name);
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var result = ptr != IntPtr.Zero;
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// just cache the positive results because there might
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// actually be new properties getting installed
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if (result)
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PropertyNameCache[name] = result;
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GLib.Marshaller.Free(native_name);
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return result;
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}
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public object this[string property] {
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get {
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if (PropertyExists(property)) {
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using (GLib.Value v = GetProperty(property)) {
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return v.Val;
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}
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}
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else
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throw new PropertyNotFoundException();
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}
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set {
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if (PropertyExists(property)) {
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if (value == null) {
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throw new ArgumentNullException();
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}
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var type = value.GetType();
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var gtype = (GLib.GType)type;
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if (gtype == null) {
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throw new Exception("Could not find a GType for type " + type.FullName);
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}
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GLib.Value v = new GLib.Value((GLib.GType)value.GetType());
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v.Val = value;
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SetProperty(property, v);
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v.Dispose();
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}
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else
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throw new PropertyNotFoundException();
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}
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}
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public void Connect(string signal, SignalHandler handler) {
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DynamicSignal.Connect(this, signal, handler);
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}
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public void Disconnect(string signal, SignalHandler handler) {
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DynamicSignal.Disconnect(this, signal, handler);
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}
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public void Connect(string signal, Delegate handler) {
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DynamicSignal.Connect(this, signal, handler);
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}
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public void Disconnect(string signal, Delegate handler) {
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DynamicSignal.Disconnect(this, signal, handler);
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}
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public object Emit(string signal, params object[] parameters) {
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return DynamicSignal.Emit(this, signal, parameters);
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}
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}
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} |