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Display.cs
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Display.cs
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/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using ElmSharp;
namespace Tizen.Multimedia
{
internal enum DisplayType
{
/// <summary>
/// Overlay surface display.
/// </summary>
Overlay,
/// <summary>
/// Evas image object surface display.
/// </summary>
Surface,
/// <summary>
/// This disposes off buffers.
/// </summary>
None,
}
internal interface IDisplayable<TError>
{
TError ApplyEvasDisplay(DisplayType type, EvasObject evasObject);
TError ApplyEcoreWindow(IntPtr windowHandle);
}
internal interface IDisplaySetter
{
TError SetDisplay<TError>(IDisplayable<TError> target);
}
internal class EvasDisplaySetter : IDisplaySetter
{
private readonly DisplayType _type;
private readonly EvasObject _target;
internal EvasDisplaySetter(DisplayType type, EvasObject target)
{
if (target == IntPtr.Zero)
{
throw new ArgumentException("The evas object is not realized.");
}
_type = type;
_target = target;
}
public TError SetDisplay<TError>(IDisplayable<TError> target)
{
return target.ApplyEvasDisplay(_type, _target);
}
}
internal class EcoreDisplaySetter : IDisplaySetter
{
private readonly IntPtr _windowHandle;
internal EcoreDisplaySetter(IntPtr windowHandle)
{
_windowHandle = windowHandle;
}
public TError SetDisplay<TError>(IDisplayable<TError> target)
{
return target.ApplyEcoreWindow(_windowHandle);
}
}
/// <summary>
/// Provides a means to wrap various display types.
/// </summary>
/// <seealso cref="T:Tizen.Multimedia.Player"/>
/// <seealso cref="T:Tizen.Multimedia.Camera"/>
/// <seealso cref="T:Tizen.Multimedia.Remoting.ScreenMirroring"/>
/// <since_tizen> 3 </since_tizen>
public class Display
{
private readonly IDisplaySetter _setter;
/// <summary>
/// Initializes a new instance of the <see cref="Display"/> class with a <see cref="MediaView"/> class.
/// </summary>
/// <param name="mediaView">A <see cref="MediaView"/> to display.</param>
/// <since_tizen> 3 </since_tizen>
public Display(MediaView mediaView)
{
if (mediaView == null)
{
throw new ArgumentNullException(nameof(mediaView));
}
_setter = new EvasDisplaySetter(DisplayType.Surface, mediaView);
HasMediaView = true;
}
/// <summary>
/// Initializes a new instance of the <see cref="Display"/> class with a <see cref="Window"/> class.
/// </summary>
/// <param name="window">A <see cref="Window"/> to display.</param>
/// <since_tizen> 3 </since_tizen>
public Display(Window window)
{
if (window == null)
{
throw new ArgumentNullException(nameof(window));
}
_setter = new EvasDisplaySetter(DisplayType.Overlay, window);
}
/// <summary>
/// Initializes a new instance of the <see cref="Display"/> class with a <see cref="NUI.Window"/> class.
/// </summary>
/// <param name="window">A <see cref="NUI.Window"/> to display.</param>
/// <remarks>
/// The <see cref="NUI.Window.BackgroundColor"/> must be <see cref="NUI.Color.Transparent"/>
/// for the <see cref="Display"/> to be rendered correctly.
/// </remarks>
/// <since_tizen> 3 </since_tizen>
public Display(NUI.Window window)
{
if (window == null)
{
throw new ArgumentNullException(nameof(window));
}
_setter = new EcoreDisplaySetter(window.GetNativeWindowHandler());
}
private EvasObject EvasObject { get; }
private DisplayType Type { get; }
private object _owner;
internal bool HasMediaView { get; } = false;
internal object Owner => _owner;
internal void SetOwner(object newOwner)
{
if (_owner != null && newOwner != null)
{
throw new ArgumentException("The display has already been assigned to another.");
}
_owner = newOwner;
}
internal TError ApplyTo<TError>(IDisplayable<TError> target)
{
return _setter.SetDisplay(target);
}
}
}