/
Image.cs
754 lines (683 loc) · 25.6 KB
/
Image.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 System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace ElmSharp
{
/// <summary>
/// The Image is a widget that allows one to load and display an image file on it,
/// be it from a disk file or from a memory region.
/// Inherits Widget.
/// </summary>
/// <since_tizen> preview </since_tizen>
public class Image : Widget
{
bool _canScaleUp = true;
bool _canScaleDown = true;
SmartEvent _clicked;
Color _color = Color.Default;
EvasImage _imageObject = null;
/// <summary>
/// Creates and initializes a new instance of the Image class.
/// </summary>
/// <param name="parent">The parent is a given container, which will be attached by the image as a child. It's <see cref="EvasObject"/> type.</param>
/// <since_tizen> preview </since_tizen>
public Image(EvasObject parent) : base(parent)
{
_clicked = new SmartEvent(this, "clicked");
_clicked.On += (s, e) => Clicked?.Invoke(this, EventArgs.Empty);
}
/// <summary>
/// Clicked will be triggered when the image is clicked.
/// </summary>
/// <since_tizen> preview </since_tizen>
public event EventHandler Clicked;
/// <summary>
/// LoadingCompleted will be triggered when the image is loaded completely.
/// </summary>
/// <since_tizen> preview </since_tizen>
public event EventHandler LoadingCompleted;
/// <summary>
/// Clicked will be triggered when the image fails to load.
/// </summary>
/// <since_tizen> preview </since_tizen>
public event EventHandler LoadingFailed;
/// <summary>
/// Gets the file that is used as an image.
/// </summary>
/// <since_tizen> preview </since_tizen>
public string File
{
get
{
return Interop.Elementary.elm_image_file_get(RealHandle);
}
}
/// <summary>
/// Sets or gets the smooth effect for an image.
/// </summary>
/// <since_tizen> preview </since_tizen>
public bool IsSmooth
{
get
{
return Interop.Elementary.elm_image_smooth_get(RealHandle);
}
set
{
Interop.Elementary.elm_image_smooth_set(RealHandle, value);
}
}
/// <summary>
/// Sets or gets whether scaling is disabled on the object.
/// </summary>
/// <since_tizen> preview </since_tizen>
public bool IsScaling
{
get
{
return !Interop.Elementary.elm_image_no_scale_get(RealHandle);
}
set
{
Interop.Elementary.elm_image_no_scale_set(RealHandle, !value);
}
}
/// <summary>
/// Sets or gets whether the object is down resizable.
/// </summary>
/// <since_tizen> preview </since_tizen>
public bool CanScaleDown
{
get
{
return _canScaleDown;
}
set
{
_canScaleDown = value;
Interop.Elementary.elm_image_resizable_set(RealHandle, _canScaleUp, _canScaleDown);
}
}
/// <summary>
/// Sets or gets whether the object is up resizable.
/// </summary>
/// <since_tizen> preview </since_tizen>
public bool CanScaleUp
{
get
{
return _canScaleUp;
}
set
{
_canScaleUp = value;
Interop.Elementary.elm_image_resizable_set(RealHandle, _canScaleUp, _canScaleDown);
}
}
/// <summary>
/// Sets or gets whether the image fills the entire object area, when keeping the aspect ratio.
/// </summary>
/// <since_tizen> preview </since_tizen>
public bool CanFillOutside
{
get
{
return Interop.Elementary.elm_image_fill_outside_get(RealHandle);
}
set
{
Interop.Elementary.elm_image_fill_outside_set(RealHandle, value);
}
}
/// <summary>
/// Sets or gets the prescale size for the image.
/// </summary>
/// <since_tizen> preview </since_tizen>
public int PrescaleSize
{
get
{
return Interop.Elementary.elm_image_prescale_get(RealHandle);
}
set
{
Interop.Elementary.elm_image_prescale_set(RealHandle, value);
}
}
/// <summary>
/// Sets or gets whether the original aspect ratio of the image should be kept on resize.
/// </summary>
/// <since_tizen> preview </since_tizen>
public bool IsFixedAspect
{
get
{
return Interop.Elementary.elm_image_aspect_fixed_get(RealHandle);
}
set
{
Interop.Elementary.elm_image_aspect_fixed_set(RealHandle, value);
}
}
/// <summary>
/// Sets or gets whether an image object (which supports animation) is to animate itself.
/// </summary>
/// <since_tizen> preview </since_tizen>
public bool IsAnimated
{
get
{
return Interop.Elementary.elm_image_animated_get(RealHandle);
}
set
{
Interop.Elementary.elm_image_animated_set(RealHandle, value);
}
}
/// <summary>
/// Gets whether an image object supports animation.
/// </summary>
/// <since_tizen> preview </since_tizen>
public bool IsAnimatedAvailable
{
get
{
return Interop.Elementary.elm_image_animated_available_get(RealHandle);
}
}
/// <summary>
/// Sets or gets whether an image object is under animation.
/// </summary>
/// <remarks>
/// An image object, even if it supports animation, will be displayed by default without animation.
/// To actually start playing any image object's animation, <see cref="IsAnimated"/> should be TRUE before setting this property true.
/// </remarks>
/// <since_tizen> preview </since_tizen>
public bool IsAnimationPlaying
{
get
{
return Interop.Elementary.elm_image_animated_play_get(RealHandle);
}
set
{
Interop.Elementary.elm_image_animated_play_set(RealHandle, value);
}
}
/// <summary>
/// Sets or gets whether the image is 'editable'.
/// </summary>
/// <since_tizen> preview </since_tizen>
public bool IsEditable
{
get
{
return Interop.Elementary.elm_image_editable_get(RealHandle);
}
set
{
Interop.Elementary.elm_image_editable_set(RealHandle, value);
}
}
/// <summary>
/// Gets the current size of the image.
/// </summary>
/// <since_tizen> preview </since_tizen>
public Size ObjectSize
{
get
{
Interop.Elementary.elm_image_object_size_get(RealHandle, out int w, out int h);
return new Size(w, h);
}
}
/// <summary>
/// Sets or gets whether the alpha channel data is being used on the given image object.
/// </summary>
/// <since_tizen> preview </since_tizen>
public bool IsOpaque
{
get
{
if (ImageObject != null)
{
return ImageObject.IsOpaque;
}
return false;
}
set
{
if (ImageObject != null)
{
ImageObject.IsOpaque = value;
}
}
}
/// <summary>
/// Sets or gets the image orientation.
/// </summary>
/// <since_tizen> preview </since_tizen>
public ImageOrientation Orientation
{
get
{
return (ImageOrientation)Interop.Elementary.elm_image_orient_get(RealHandle);
}
set
{
Interop.Elementary.elm_image_orient_set(RealHandle, (int)value);
}
}
/// <summary>
/// Sets or gets the image color.
/// </summary>
/// <since_tizen> preview </since_tizen>
public override Color Color
{
get
{
return _color;
}
set
{
if (ImageObject != null)
{
if (value.IsDefault)
{
ImageObject.Color = Color.FromRgba(255, 255, 255, 255);
}
else
{
ImageObject.Color = value;
}
}
_color = value;
}
}
/// <summary>
/// Sets the background color.
/// </summary>
/// <since_tizen> preview </since_tizen>
public override Color BackgroundColor
{
set
{
if (value.IsDefault)
{
SetPartColor("bg", Color.Transparent);
}
else
{
SetPartColor("bg", value);
}
_backgroundColor = value;
}
}
/// <summary>
/// Gets the inlined image object of the image widget.
/// This property allows one to get the underlying EvasObject of type Image from this elementary widget. It can be useful to do things like save the image to a file, etc.
/// </summary>
/// <remarks>Be careful not to manipulate it, as it is under the control of the widget.</remarks>
/// <since_tizen> preview </since_tizen>
public EvasImage ImageObject
{
get
{
if (_imageObject == null)
{
IntPtr evasObj = Interop.Elementary.elm_image_object_get(RealHandle);
if (evasObj != IntPtr.Zero)
{
_imageObject = new EvasImage(this, evasObj);
_imageObject.Deleted += (s, e) => _imageObject = null;
}
}
return _imageObject;
}
}
/// <summary>
/// Sets the dimensions for an image object's border, a region which is not scaled together with its center ever.
/// </summary>
/// <param name="left">The border's left width.</param>
/// <param name="right">The border's right width.</param>
/// <param name="top">The border's top width.</param>
/// <param name="bottom">The border's bottom width.</param>
/// <since_tizen> preview </since_tizen>
public void SetBorder(int left, int right, int top, int bottom)
{
ImageObject?.SetBorder(left, right, top, bottom);
}
/// <summary>
/// Sets or gets if the center part of the given image object (not the border) should be drawn.
/// </summary>
/// <remarks>
/// When rendering, the image may be scaled to fit the size of the image object.
/// This function sets if the center part of the scaled image is to be drawn or left completely blank, or forced to be solid.
/// Very useful for frames and decorations.
/// </remarks>
/// <since_tizen> preview </since_tizen>
public ImageBorderFillMode BorderCenterFillMode
{
get
{
if (ImageObject != null)
{
return ImageObject.BorderCenterFillMode;
}
else
{
return default(ImageBorderFillMode);
}
}
set
{
if (ImageObject != null)
{
ImageObject.BorderCenterFillMode = value;
}
}
}
/// <summary>
/// Sets the file that is used as the image's source.
/// </summary>
/// <param name="file">The path to the file that is used as an image source.</param>
/// <returns>(true = success, false = error)</returns>
/// <since_tizen> preview </since_tizen>
public bool Load(string file)
{
if (file == null)
throw new ArgumentNullException("file");
Interop.Elementary.elm_image_async_open_set(RealHandle, false);
Interop.Elementary.elm_image_preload_disabled_set(RealHandle, true);
return Interop.Elementary.elm_image_file_set(RealHandle, file, null);
}
/// <summary>
/// Sets the URI that is used as the image's source.
/// </summary>
/// <param name="uri">The URI to the file that is used as an image source.</param>
/// <returns>(true = success, false = error)</returns>
/// <since_tizen> preview </since_tizen>
public bool Load(Uri uri)
{
if (uri == null)
throw new ArgumentNullException("uri");
return Load(uri.IsFile ? uri.LocalPath : uri.AbsoluteUri);
}
/// <summary>
/// Sets a location in the memory to be used as an image object's source bitmap.
/// </summary>
/// <remarks>
/// This function is handy when the contents of an image file are mapped into the memory, for example,
/// the format string should be something like "png", "jpg", "tga", "tiff", "bmp" etc, when provided (null, on the contrary).
/// This improves the loader performance as it tries the "correct" loader first, before trying a range of other possible loaders until one succeeds.
/// </remarks>
/// <param name="img">The binary data that is used as an image source.</param>
/// <param name="size">The size of the binary data blob img.</param>
/// <returns>(true = success, false = error)</returns>
/// <since_tizen> preview </since_tizen>
[Obsolete("This method will be removed. Use Load(Stream stream) instead.")]
public unsafe bool Load(byte* img, long size)
{
if (img == null)
throw new ArgumentNullException("img");
Interop.Elementary.elm_image_async_open_set(RealHandle, false);
Interop.Elementary.elm_image_preload_disabled_set(RealHandle, true);
return Interop.Elementary.elm_image_memfile_set(RealHandle, img, size, IntPtr.Zero, IntPtr.Zero);
}
/// <summary>
/// Sets the stream that is used as the image's source.
/// </summary>
/// <param name="stream">The stream that is used as an image source.</param>
/// <returns>(true = success, false = error)</returns>
/// <since_tizen> preview </since_tizen>
public bool Load(Stream stream)
{
if (stream == null)
throw new ArgumentNullException("stream");
Interop.Elementary.elm_image_async_open_set(RealHandle, false);
Interop.Elementary.elm_image_preload_disabled_set(RealHandle, true);
MemoryStream memstream = new MemoryStream();
stream.CopyTo(memstream);
unsafe
{
byte[] dataArr = memstream.ToArray();
fixed (byte* data = &dataArr[0])
{
return Interop.Elementary.elm_image_memfile_set(RealHandle, data, dataArr.Length, IntPtr.Zero, IntPtr.Zero);
}
}
}
/// <summary>
/// Sets the file that is used as the image's source with async.
/// </summary>
/// <param name="file">The path to the file that is used as an image source.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>(true = success, false = error)</returns>
/// <since_tizen> preview </since_tizen>
public Task<bool> LoadAsync(string file, CancellationToken cancellationToken = default(CancellationToken))
{
if (file == null)
throw new ArgumentNullException("file");
Interop.Elementary.elm_image_async_open_set(RealHandle, true);
Interop.Elementary.elm_image_preload_disabled_set(RealHandle, false);
var tcs = new TaskCompletionSource<bool>();
cancellationToken.Register(() =>
{
if (tcs != null && !tcs.Task.IsCompleted)
{
tcs.SetCanceled();
}
});
SmartEvent loadReady = new SmartEvent(this, RealHandle, "load,ready");
loadReady.On += (s, e) =>
{
loadReady.Dispose();
LoadingCompleted?.Invoke(this, EventArgs.Empty);
if (tcs != null && !tcs.Task.IsCompleted)
{
tcs.SetResult(true);
}
};
SmartEvent loadError = new SmartEvent(this, RealHandle, "load,error");
loadError.On += (s, e) =>
{
loadError.Dispose();
LoadingFailed?.Invoke(this, EventArgs.Empty);
if (tcs != null && !tcs.Task.IsCompleted)
{
tcs.SetResult(false);
}
};
bool ret = Interop.Elementary.elm_image_file_set(RealHandle, file, null);
if (!ret)
{
throw new InvalidOperationException("Failed to set file to Image");
}
return tcs.Task;
}
/// <summary>
/// Sets the URI that is used as the image's source with async.
/// </summary>
/// <param name="uri">The URI to the file that is used as an image source.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>(true = success, false = error)</returns>
/// <since_tizen> preview </since_tizen>
public Task<bool> LoadAsync(Uri uri, CancellationToken cancellationToken = default(CancellationToken))
{
if (uri == null)
throw new ArgumentNullException("uri");
return LoadAsync(uri.IsFile ? uri.LocalPath : uri.AbsoluteUri, cancellationToken);
}
/// <summary>
/// Sets the stream that is used as the image's source with async.
/// </summary>
/// <param name="stream">The stream that is used as an image source.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>(true = success, false = error)</returns>
/// <since_tizen> preview </since_tizen>
public async Task<bool> LoadAsync(Stream stream, CancellationToken cancellationToken = default(CancellationToken))
{
if (stream == null)
throw new ArgumentNullException("stream");
Interop.Elementary.elm_image_async_open_set(RealHandle, true);
Interop.Elementary.elm_image_preload_disabled_set(RealHandle, false);
var tcs = new TaskCompletionSource<bool>();
cancellationToken.Register(() =>
{
if (tcs != null && !tcs.Task.IsCompleted)
{
tcs.SetCanceled();
}
});
SmartEvent loadReady = new SmartEvent(this, RealHandle, "load,ready");
loadReady.On += (s, e) =>
{
loadReady.Dispose();
LoadingCompleted?.Invoke(this, EventArgs.Empty);
if (tcs != null && !tcs.Task.IsCompleted)
{
tcs.SetResult(true);
}
};
SmartEvent loadError = new SmartEvent(this, RealHandle, "load,error");
loadError.On += (s, e) =>
{
loadError.Dispose();
LoadingFailed?.Invoke(this, EventArgs.Empty);
if (tcs != null && !tcs.Task.IsCompleted)
{
tcs.SetResult(false);
}
};
using (MemoryStream memstream = new MemoryStream())
{
await stream.CopyToAsync(memstream);
unsafe
{
byte[] dataArr = memstream.ToArray();
fixed (byte* data = &dataArr[0])
{
bool ret = Interop.Elementary.elm_image_memfile_set(RealHandle, data, dataArr.Length, IntPtr.Zero, IntPtr.Zero);
if (!ret)
{
return false;
}
}
}
}
return await tcs.Task;
}
/// <summary>
/// Sets the color of the Color class for a given widget.
/// </summary>
/// <param name="part">The name of the Color class.</param>
/// <param name="color">The struct of the Color class.</param>
/// <since_tizen> preview </since_tizen>
public override void SetPartColor(string part, Color color)
{
Interop.Elementary.elm_object_color_class_color_set(Handle, part, color.R * color.A / 255,
color.G * color.A / 255,
color.B * color.A / 255,
color.A);
}
/// <summary>
/// Gets the color of the Color class for a given widget.
/// </summary>
/// <param name="part">The name of the Color class.</param>
/// <returns>The color object.</returns>
/// <since_tizen> preview </since_tizen>
public override Color GetPartColor(string part)
{
Interop.Elementary.elm_object_color_class_color_get(Handle, part, out int r, out int g, out int b, out int a);
return new Color((int)(r / (a / 255.0)), (int)(g / (a / 255.0)), (int)(b / (a / 255.0)), a);
}
/// <summary>
/// Sets the content at a part of a given container widget.
/// </summary>
/// <param name="parent">The parent is a given container, which will be attached by the image as a child. It's <see cref="EvasObject"/> type.</param>
/// <returns>The new object, otherwise null if it cannot be created.</returns>
/// <since_tizen> preview </since_tizen>
protected override IntPtr CreateHandle(EvasObject parent)
{
IntPtr handle = Interop.Elementary.elm_layout_add(parent.Handle);
Interop.Elementary.elm_layout_theme_set(handle, "layout", "background", "default");
RealHandle = Interop.Elementary.elm_image_add(handle);
Interop.Elementary.elm_object_part_content_set(handle, "elm.swallow.content", RealHandle);
return handle;
}
}
/// <summary>
/// Enumeration for the fill mode of the image border.
/// </summary>
/// <since_tizen> preview </since_tizen>
public enum ImageBorderFillMode
{
/// <summary>
/// None mode of the image border.
/// </summary>
None,
/// <summary>
/// Default mode of the image border.
/// </summary>
Default,
/// <summary>
/// Solid mode of the image border.
/// </summary>
Solid,
}
/// <summary>
/// Enumeration for the possible orientation options.
/// </summary>
/// <since_tizen> preview </since_tizen>
public enum ImageOrientation : int
{
/// <summary>
/// No orientation change.
/// </summary>
None = 0,
/// <summary>
/// Rotate 90 degrees clockwise.
/// </summary>
Rotate90,
/// <summary>
/// Rotate 180 degrees clockwise.
/// </summary>
Rotate180,
/// <summary>
/// Rotate 90 degrees counter-clockwise (i.e., 270 degrees clockwise).
/// </summary>
Rotate270,
/// <summary>
/// Flip the image horizontally.
/// </summary>
FlipHorizontal,
/// <summary>
/// Flip the image vertically.
/// </summary>
FlipVertical,
/// <summary>
/// Flip the image along the Y = (width - X) line (bottom-left to top-right).
/// </summary>
FlipTranspose,
/// <summary>
/// Flip the image along the Y = X line (top-left to bottom-right).
/// </summary>
FlipTransverse
}
}