284 lines
10 KiB
C#
284 lines
10 KiB
C#
using System;
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using System.IO;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using Ink_Canvas.Helpers;
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using Microsoft.Win32;
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namespace Ink_Canvas
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{
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public partial class MainWindow : Window
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{
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#region Image
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private async void BtnImageInsert_Click(object sender, RoutedEventArgs e)
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{
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OpenFileDialog openFileDialog = new OpenFileDialog();
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openFileDialog.Filter = "Image files (*.jpg; *.jpeg; *.png; *.bmp)|*.jpg;*.jpeg;*.png;*.bmp";
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if (openFileDialog.ShowDialog() == true)
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{
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string filePath = openFileDialog.FileName;
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Image image = await CreateAndCompressImageAsync(filePath);
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if (image != null)
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{
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string timestamp = "img_" + DateTime.Now.ToString("yyyyMMdd_HH_mm_ss_fff");
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image.Name = timestamp;
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CenterAndScaleElement(image);
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inkCanvas.Children.Add(image);
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// 添加鼠标事件处理，使图片可以被选择
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image.MouseDown += UIElement_MouseDown;
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image.IsManipulationEnabled = true;
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timeMachine.CommitElementInsertHistory(image);
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}
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}
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}
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private async Task<Image> CreateAndCompressImageAsync(string filePath)
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{
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string savePath = Path.Combine(Settings.Automation.AutoSavedStrokesLocation, "File Dependency");
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if (!Directory.Exists(savePath))
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{
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Directory.CreateDirectory(savePath);
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}
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string fileExtension = Path.GetExtension(filePath);
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string timestamp = "img_" + DateTime.Now.ToString("yyyyMMdd_HH_mm_ss_fff");
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string newFilePath = Path.Combine(savePath, timestamp + fileExtension);
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await Task.Run(() => File.Copy(filePath, newFilePath, true));
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return await Dispatcher.InvokeAsync(() =>
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{
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BitmapImage bitmapImage = new BitmapImage();
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bitmapImage.BeginInit();
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bitmapImage.UriSource = new Uri(newFilePath);
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bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
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bitmapImage.EndInit();
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int width = bitmapImage.PixelWidth;
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int height = bitmapImage.PixelHeight;
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Image image = new Image();
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// 设置拉伸模式为Fill，支持任意比例缩放
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image.Stretch = Stretch.Fill;
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if (isLoaded && Settings.Canvas.IsCompressPicturesUploaded && (width > 1920 || height > 1080))
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{
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double scaleX = 1920.0 / width;
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double scaleY = 1080.0 / height;
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double scale = Math.Min(scaleX, scaleY);
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TransformedBitmap transformedBitmap = new TransformedBitmap(bitmapImage, new ScaleTransform(scale, scale));
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image.Source = transformedBitmap;
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image.Width = transformedBitmap.PixelWidth;
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image.Height = transformedBitmap.PixelHeight;
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}
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else
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{
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image.Source = bitmapImage;
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image.Width = width;
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image.Height = height;
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}
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return image;
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});
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}
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#endregion
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#region Media
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private async void BtnMediaInsert_Click(object sender, RoutedEventArgs e)
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{
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OpenFileDialog openFileDialog = new OpenFileDialog();
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openFileDialog.Filter = "Media files (*.mp4; *.avi; *.wmv)|*.mp4;*.avi;*.wmv";
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if (openFileDialog.ShowDialog() == true)
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{
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string filePath = openFileDialog.FileName;
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byte[] mediaBytes = await Task.Run(() => File.ReadAllBytes(filePath));
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MediaElement mediaElement = await CreateMediaElementAsync(filePath);
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if (mediaElement != null)
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{
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CenterAndScaleElement(mediaElement);
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InkCanvas.SetLeft(mediaElement, 0);
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InkCanvas.SetTop(mediaElement, 0);
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inkCanvas.Children.Add(mediaElement);
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// 添加鼠标事件处理，使媒体元素可以被选择
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mediaElement.MouseDown += UIElement_MouseDown;
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mediaElement.IsManipulationEnabled = true;
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mediaElement.LoadedBehavior = MediaState.Manual;
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mediaElement.UnloadedBehavior = MediaState.Manual;
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mediaElement.Loaded += async (_, args) =>
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{
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mediaElement.Play();
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await Task.Delay(100);
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mediaElement.Pause();
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};
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timeMachine.CommitElementInsertHistory(mediaElement);
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}
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}
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}
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private async Task<MediaElement> CreateMediaElementAsync(string filePath)
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{
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string savePath = Path.Combine(Settings.Automation.AutoSavedStrokesLocation, "File Dependency");
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if (!Directory.Exists(savePath))
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{
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Directory.CreateDirectory(savePath);
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}
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return await Dispatcher.InvokeAsync(() =>
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{
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MediaElement mediaElement = new MediaElement();
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mediaElement.Source = new Uri(filePath);
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string timestamp = "media_" + DateTime.Now.ToString("yyyyMMdd_HH_mm_ss_fff");
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mediaElement.Name = timestamp;
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mediaElement.LoadedBehavior = MediaState.Manual;
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mediaElement.UnloadedBehavior = MediaState.Manual;
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mediaElement.Width = 256;
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mediaElement.Height = 256;
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string fileExtension = Path.GetExtension(filePath);
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string newFilePath = Path.Combine(savePath, mediaElement.Name + fileExtension);
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File.Copy(filePath, newFilePath, true);
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mediaElement.Source = new Uri(newFilePath);
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return mediaElement;
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});
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}
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#endregion
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#region Image Operations
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/// <summary>
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/// 旋转图片
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/// </summary>
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/// <param name="image">要旋转的图片</param>
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/// <param name="angle">旋转角度（正数为顺时针，负数为逆时针）</param>
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private void RotateImage(Image image, double angle)
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{
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if (image == null) return;
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try
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{
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// 获取当前的变换
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var transformGroup = image.RenderTransform as TransformGroup ?? new TransformGroup();
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// 查找现有的旋转变换
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RotateTransform rotateTransform = null;
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foreach (Transform transform in transformGroup.Children)
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{
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if (transform is RotateTransform rt)
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{
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rotateTransform = rt;
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break;
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}
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}
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// 如果没有旋转变换，创建一个新的
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if (rotateTransform == null)
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{
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rotateTransform = new RotateTransform();
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transformGroup.Children.Add(rotateTransform);
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}
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// 设置旋转中心为图片中心
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rotateTransform.CenterX = image.ActualWidth / 2;
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rotateTransform.CenterY = image.ActualHeight / 2;
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// 累加旋转角度
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rotateTransform.Angle = (rotateTransform.Angle + angle) % 360;
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// 应用变换
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image.RenderTransform = transformGroup;
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// 提交到时间机器以支持撤销
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// 注意：旋转操作目前不支持撤销，因为需要更复杂的历史记录机制
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}
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catch (Exception ex)
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{
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// 记录错误但不中断程序
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System.Diagnostics.Debug.WriteLine($"旋转图片时发生错误: {ex.Message}");
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}
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}
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/// <summary>
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/// 删除图片
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/// </summary>
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/// <param name="image">要删除的图片</param>
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private void DeleteImage(Image image)
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{
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if (image == null) return;
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try
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{
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// 从画布中移除图片
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if (inkCanvas.Children.Contains(image))
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{
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inkCanvas.Children.Remove(image);
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// 取消选择
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DeselectUIElement();
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// 提交到时间机器以支持撤销
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timeMachine.CommitElementRemoveHistory(image);
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}
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}
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catch (Exception ex)
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{
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// 记录错误但不中断程序
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System.Diagnostics.Debug.WriteLine($"删除图片时发生错误: {ex.Message}");
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}
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}
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#endregion
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private void CenterAndScaleElement(FrameworkElement element)
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{
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double maxWidth = SystemParameters.PrimaryScreenWidth / 2;
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double maxHeight = SystemParameters.PrimaryScreenHeight / 2;
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double scaleX = maxWidth / element.Width;
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double scaleY = maxHeight / element.Height;
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double scale = Math.Min(scaleX, scaleY);
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// 直接设置元素的大小，而不使用RenderTransform
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double newWidth = element.Width * scale;
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double newHeight = element.Height * scale;
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element.Width = newWidth;
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element.Height = newHeight;
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// 计算居中位置
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double canvasWidth = inkCanvas.ActualWidth;
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double canvasHeight = inkCanvas.ActualHeight;
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double centerX = (canvasWidth - newWidth) / 2;
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double centerY = (canvasHeight - newHeight) / 2;
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// 直接设置位置，而不使用RenderTransform
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InkCanvas.SetLeft(element, centerX);
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InkCanvas.SetTop(element, centerY);
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// 清除任何现有的RenderTransform
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element.RenderTransform = Transform.Identity;
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}
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}
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}
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