规范类名及命名空间名称
This commit is contained in:
李伟
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using System;
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using System.Collections.ObjectModel;
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using System.Collections.Specialized;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Shapes;
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using XP.ImageProcessing.RoiControl.Models;
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namespace XP.ImageProcessing.RoiControl.Controls
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{
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public partial class PolygonRoiCanvas : UserControl
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{
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private bool isDragging = false;
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private Point lastMousePosition;
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private const double ZoomStep = 1.2;
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private Adorner? currentAdorner;
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public PolygonRoiCanvas()
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{
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InitializeComponent();
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Loaded += PolygonRoiCanvas_Loaded;
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}
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private void PolygonRoiCanvas_Loaded(object sender, RoutedEventArgs e)
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{
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// 监听ROI集合变化
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if (ROIItems != null)
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{
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ROIItems.CollectionChanged += ROIItems_CollectionChanged;
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foreach (var roi in ROIItems)
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{
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roi.PropertyChanged += ROI_PropertyChanged;
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// 如果是多边形ROI，监听Points集合变化
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if (roi is PolygonROI polygonROI)
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{
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polygonROI.Points.CollectionChanged += Points_CollectionChanged;
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}
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}
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}
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}
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private void ROIItems_CollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
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{
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if (e.NewItems != null)
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{
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foreach (ROIShape roi in e.NewItems)
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{
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roi.PropertyChanged += ROI_PropertyChanged;
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// 如果是多边形ROI，监听Points集合变化
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if (roi is PolygonROI polygonROI)
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{
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polygonROI.Points.CollectionChanged += Points_CollectionChanged;
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}
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}
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}
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if (e.OldItems != null)
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{
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foreach (ROIShape roi in e.OldItems)
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{
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roi.PropertyChanged -= ROI_PropertyChanged;
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// 取消监听Points集合变化
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if (roi is PolygonROI polygonROI)
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{
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polygonROI.Points.CollectionChanged -= Points_CollectionChanged;
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}
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}
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}
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}
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private void Points_CollectionChanged(object? sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
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{
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// 只在删除或添加顶点时更新Adorner，拖拽时的Replace操作不触发更�?
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if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Remove ||
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e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Add)
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{
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// Points集合变化时，如果当前选中的是多边形ROI，更新Adorner
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if (SelectedROI is PolygonROI polygonROI && sender == polygonROI.Points)
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{
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// 使用Dispatcher延迟更新，确保UI已经处理完Points的变�?
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Dispatcher.BeginInvoke(new Action(() =>
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{
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UpdateAdorner();
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}), System.Windows.Threading.DispatcherPriority.Render);
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}
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}
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// Replace操作（拖拽时）不需要重建Adorner，只需要让现有Adorner重新布局
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}
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private void ROI_PropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
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{
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if (e.PropertyName == nameof(ROIShape.IsSelected))
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{
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UpdateAdorner();
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}
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// 监听Points属性变化（整个集合替换的情况）
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else if (e.PropertyName == "Points" && sender is PolygonROI)
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{
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UpdateAdorner();
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}
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}
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#region Dependency Properties
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public static readonly DependencyProperty ImageSourceProperty =
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DependencyProperty.Register(nameof(ImageSource), typeof(ImageSource), typeof(PolygonRoiCanvas),
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new PropertyMetadata(null, OnImageSourceChanged));
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public ImageSource? ImageSource
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{
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get => (ImageSource?)GetValue(ImageSourceProperty);
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set => SetValue(ImageSourceProperty, value);
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}
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private static void OnImageSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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var control = (PolygonRoiCanvas)d;
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if (e.NewValue is ImageSource imageSource)
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{
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control.CanvasWidth = imageSource.Width;
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control.CanvasHeight = imageSource.Height;
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}
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}
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public static readonly DependencyProperty ROIItemsProperty =
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DependencyProperty.Register(nameof(ROIItems), typeof(ObservableCollection<ROIShape>), typeof(PolygonRoiCanvas),
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new PropertyMetadata(null));
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public ObservableCollection<ROIShape>? ROIItems
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{
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get => (ObservableCollection<ROIShape>?)GetValue(ROIItemsProperty);
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set => SetValue(ROIItemsProperty, value);
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}
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public static readonly DependencyProperty ZoomScaleProperty =
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DependencyProperty.Register(nameof(ZoomScale), typeof(double), typeof(PolygonRoiCanvas),
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new PropertyMetadata(1.0, OnZoomScaleChanged));
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public double ZoomScale
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{
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get => (double)GetValue(ZoomScaleProperty);
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set => SetValue(ZoomScaleProperty, Math.Max(0.1, Math.Min(10.0, value)));
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}
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private static void OnZoomScaleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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var control = (PolygonRoiCanvas)d;
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// 缩放变化时更新Adorner以调整控制点大小
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control.UpdateAdorner();
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}
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public static readonly DependencyProperty PanOffsetXProperty =
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DependencyProperty.Register(nameof(PanOffsetX), typeof(double), typeof(PolygonRoiCanvas),
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new PropertyMetadata(0.0, OnPanOffsetChanged));
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public double PanOffsetX
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{
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get => (double)GetValue(PanOffsetXProperty);
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set => SetValue(PanOffsetXProperty, value);
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}
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public static readonly DependencyProperty PanOffsetYProperty =
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DependencyProperty.Register(nameof(PanOffsetY), typeof(double), typeof(PolygonRoiCanvas),
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new PropertyMetadata(0.0, OnPanOffsetChanged));
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public double PanOffsetY
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{
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get => (double)GetValue(PanOffsetYProperty);
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set => SetValue(PanOffsetYProperty, value);
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}
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private static void OnPanOffsetChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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var control = (PolygonRoiCanvas)d;
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// 平移时重建Adorner，确保控制点位置正确
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if (control.SelectedROI != null && control.SelectedROI.IsSelected)
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{
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control.UpdateAdorner();
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}
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}
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public static readonly DependencyProperty CanvasWidthProperty =
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DependencyProperty.Register(nameof(CanvasWidth), typeof(double), typeof(PolygonRoiCanvas),
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new PropertyMetadata(800.0));
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public double CanvasWidth
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{
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get => (double)GetValue(CanvasWidthProperty);
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set => SetValue(CanvasWidthProperty, value);
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}
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public static readonly DependencyProperty CanvasHeightProperty =
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DependencyProperty.Register(nameof(CanvasHeight), typeof(double), typeof(PolygonRoiCanvas),
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new PropertyMetadata(600.0));
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public double CanvasHeight
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{
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get => (double)GetValue(CanvasHeightProperty);
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set => SetValue(CanvasHeightProperty, value);
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}
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public static readonly DependencyProperty SelectedROIProperty =
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DependencyProperty.Register(nameof(SelectedROI), typeof(ROIShape), typeof(PolygonRoiCanvas),
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new PropertyMetadata(null, OnSelectedROIChanged));
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public ROIShape? SelectedROI
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{
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get => (ROIShape?)GetValue(SelectedROIProperty);
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set => SetValue(SelectedROIProperty, value);
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}
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private static void OnSelectedROIChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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var control = (PolygonRoiCanvas)d;
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// 更新IsSelected状�?
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if (e.OldValue is ROIShape oldROI)
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{
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oldROI.IsSelected = false;
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}
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if (e.NewValue is ROIShape newROI)
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{
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newROI.IsSelected = true;
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}
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control.UpdateAdorner();
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}
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#endregion Dependency Properties
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#region Adorner Management
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private void UpdateAdorner()
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{
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// 移除旧的Adorner
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if (currentAdorner != null)
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{
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var adornerLayer = AdornerLayer.GetAdornerLayer(mainCanvas);
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if (adornerLayer != null)
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{
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adornerLayer.Remove(currentAdorner);
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}
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currentAdorner = null;
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}
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// 为选中的ROI添加Adorner
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if (SelectedROI != null && SelectedROI.IsSelected)
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{
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// 查找对应的UI元素
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var container = FindROIVisual(SelectedROI);
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if (container != null)
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{
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var adornerLayer = AdornerLayer.GetAdornerLayer(mainCanvas);
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if (adornerLayer != null)
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{
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double scaleFactor = 1.0 / ZoomScale;
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if (SelectedROI is PolygonROI polygonROI)
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{
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currentAdorner = new PolygonAdorner(container, scaleFactor, polygonROI);
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}
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if (currentAdorner != null)
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{
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adornerLayer.Add(currentAdorner);
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}
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}
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}
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}
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}
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private UIElement? FindROIVisual(ROIShape roi)
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{
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// 在ItemsControl中查找对应的视觉元素
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var itemsControl = FindVisualChild<ItemsControl>(mainCanvas);
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if (itemsControl != null)
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{
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for (int i = 0; i < itemsControl.Items.Count; i++)
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{
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if (itemsControl.Items[i] == roi)
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{
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// 尝试获取容器
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var container = itemsControl.ItemContainerGenerator.ContainerFromIndex(i) as ContentPresenter;
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// 如果容器还没生成，尝试强制生�?
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if (container == null)
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{
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// 强制生成容器
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itemsControl.UpdateLayout();
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container = itemsControl.ItemContainerGenerator.ContainerFromIndex(i) as ContentPresenter;
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}
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if (container != null)
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{
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// 查找实际的形状元素（只支持多边形�?
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if (roi is PolygonROI)
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{
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return FindVisualChild<Polygon>(container);
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}
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}
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}
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}
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}
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return null;
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}
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private T? FindVisualChild<T>(DependencyObject parent) where T : DependencyObject
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{
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for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
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{
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var child = VisualTreeHelper.GetChild(parent, i);
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if (child is T result)
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{
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return result;
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}
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var childOfChild = FindVisualChild<T>(child);
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if (childOfChild != null)
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{
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return childOfChild;
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}
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}
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return null;
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}
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#endregion Adorner Management
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#region Mouse Events
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private void Canvas_MouseWheel(object sender, MouseWheelEventArgs e)
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{
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// 获取鼠标�?imageDisplayGrid 中的位置
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Point mousePos = e.GetPosition(imageDisplayGrid);
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// 获取鼠标�?Canvas 中的位置（缩放前�?
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Point mousePosOnCanvas = e.GetPosition(mainCanvas);
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double oldZoom = ZoomScale;
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double newZoom = oldZoom;
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if (e.Delta > 0)
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{
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newZoom = oldZoom * ZoomStep;
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}
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else
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{
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newZoom = oldZoom / ZoomStep;
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}
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// 限制缩放范围
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newZoom = Math.Max(0.1, Math.Min(10.0, newZoom));
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if (Math.Abs(newZoom - oldZoom) > 0.001)
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{
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// 计算缩放比例变化
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double scale = newZoom / oldZoom;
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// 更新缩放
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ZoomScale = newZoom;
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// 调整平移偏移，使鼠标位置保持不变
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// 新的偏移 = 旧偏�?+ 鼠标位置 - 鼠标位置 * 缩放比例
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PanOffsetX = mousePos.X - (mousePos.X - PanOffsetX) * scale;
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PanOffsetY = mousePos.Y - (mousePos.Y - PanOffsetY) * scale;
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}
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e.Handled = true;
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}
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private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
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{
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lastMousePosition = e.GetPosition(imageDisplayGrid);
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isDragging = false;
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mainCanvas.CaptureMouse();
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}
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private void Canvas_MouseMove(object sender, MouseEventArgs e)
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{
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if (e.LeftButton == MouseButtonState.Pressed && mainCanvas.IsMouseCaptured)
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{
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Point currentPosition = e.GetPosition(imageDisplayGrid);
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Vector delta = currentPosition - lastMousePosition;
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if (delta.Length > 5)
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{
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isDragging = true;
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PanOffsetX += delta.X;
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PanOffsetY += delta.Y;
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lastMousePosition = currentPosition;
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}
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}
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}
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private void Canvas_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
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{
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mainCanvas.ReleaseMouseCapture();
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if (!isDragging)
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{
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// 处理点击事件
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Point clickPosition = e.GetPosition(mainCanvas);
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OnCanvasClicked(clickPosition);
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}
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isDragging = false;
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}
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private void Canvas_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
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{
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// 右键点击完成多边�?
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OnRightClick();
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e.Handled = true;
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}
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private void ROI_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
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{
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// 选择ROI
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if (sender is FrameworkElement element && element.DataContext is ROIShape roi)
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{
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SelectedROI = roi;
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e.Handled = true;
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}
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}
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#endregion Mouse Events
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#region Public Methods
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public void ResetView()
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{
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// 自动适应显示窗口 (类似 PictureBox SizeMode.Zoom)
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ZoomScale = 1.0;
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PanOffsetX = 0;
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PanOffsetY = 0;
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if (imageDisplayGrid != null && CanvasWidth > 0 && CanvasHeight > 0)
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{
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// 使用 Dispatcher 延迟执行，确保布局已完�?
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Dispatcher.BeginInvoke(new Action(() =>
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{
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// 获取图像显示区域的实际尺�?
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double viewportWidth = imageDisplayGrid.ActualWidth;
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double viewportHeight = imageDisplayGrid.ActualHeight;
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if (viewportWidth > 0 && viewportHeight > 0)
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{
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// 计算宽度和高度的缩放比例
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double scaleX = viewportWidth / CanvasWidth;
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double scaleY = viewportHeight / CanvasHeight;
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// 选择较小的缩放比例，确保图像完全显示在窗口内（保持宽高比�?
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ZoomScale = Math.Min(scaleX, scaleY);
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// 居中显示�?Grid �?HorizontalAlignment �?VerticalAlignment 自动处理
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PanOffsetX = 0;
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PanOffsetY = 0;
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}
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}), System.Windows.Threading.DispatcherPriority.Loaded);
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}
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}
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private void BtnZoomIn_Click(object sender, RoutedEventArgs e)
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{
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double newZoom = ZoomScale * 1.2;
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if (newZoom <= 10.0)
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{
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ZoomScale = newZoom;
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}
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}
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private void BtnZoomOut_Click(object sender, RoutedEventArgs e)
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{
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double newZoom = ZoomScale / 1.2;
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if (newZoom >= 0.1)
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{
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ZoomScale = newZoom;
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}
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}
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private void BtnReset_Click(object sender, RoutedEventArgs e)
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{
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ResetView();
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}
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#endregion Public Methods
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#region Events
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public static readonly RoutedEvent CanvasClickedEvent =
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EventManager.RegisterRoutedEvent(nameof(CanvasClicked), RoutingStrategy.Bubble,
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typeof(RoutedEventHandler), typeof(PolygonRoiCanvas));
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public event RoutedEventHandler CanvasClicked
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{
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add { AddHandler(CanvasClickedEvent, value); }
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remove { RemoveHandler(CanvasClickedEvent, value); }
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}
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protected virtual void OnCanvasClicked(Point position)
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{
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var args = new CanvasClickedEventArgs(CanvasClickedEvent, position);
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RaiseEvent(args);
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}
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public static readonly RoutedEvent RightClickEvent =
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EventManager.RegisterRoutedEvent(nameof(RightClick), RoutingStrategy.Bubble,
|
||||
typeof(RoutedEventHandler), typeof(PolygonRoiCanvas));
|
||||
|
||||
public event RoutedEventHandler RightClick
|
||||
{
|
||||
add { AddHandler(RightClickEvent, value); }
|
||||
remove { RemoveHandler(RightClickEvent, value); }
|
||||
}
|
||||
|
||||
protected virtual void OnRightClick()
|
||||
{
|
||||
RaiseEvent(new RoutedEventArgs(RightClickEvent));
|
||||
}
|
||||
|
||||
#endregion Events
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user