李伟
775 lines
28 KiB
C#
775 lines
28 KiB
C#
using XP.ImageProcessing.RoiControl.Models;
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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.Media.Imaging;
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using System.Windows.Shapes;
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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操作不触发更新
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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的变化
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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 BitmapSource bitmap)
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{
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// 使用像素尺寸，避免 DPI 不同导致 DIP 尺寸与实际像素不一致
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control.CanvasWidth = bitmap.PixelWidth;
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control.CanvasHeight = bitmap.PixelHeight;
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control.ResetView();
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}
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else 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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control.ResetView();
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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状态
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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 Crosshair
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public static readonly DependencyProperty ShowCrosshairProperty =
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DependencyProperty.Register(nameof(ShowCrosshair), typeof(bool), typeof(PolygonRoiCanvas),
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new PropertyMetadata(false, OnShowCrosshairChanged));
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public bool ShowCrosshair
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{
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get => (bool)GetValue(ShowCrosshairProperty);
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set => SetValue(ShowCrosshairProperty, value);
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}
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private Line _crosshairH, _crosshairV;
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private static void OnShowCrosshairChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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var c = (PolygonRoiCanvas)d;
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if ((bool)e.NewValue)
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c.AddCrosshair();
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else
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c.RemoveCrosshair();
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}
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private void AddCrosshair()
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{
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RemoveCrosshair();
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double w = CanvasWidth, h = CanvasHeight;
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if (w <= 0 || h <= 0) return;
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_crosshairH = new Line { X1 = 0, Y1 = h / 2, X2 = w, Y2 = h / 2, Stroke = Brushes.Red, StrokeThickness = 1, Opacity = 0.7, IsHitTestVisible = false };
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_crosshairV = new Line { X1 = w / 2, Y1 = 0, X2 = w / 2, Y2 = h, Stroke = Brushes.Red, StrokeThickness = 1, Opacity = 0.7, IsHitTestVisible = false };
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mainCanvas.Children.Add(_crosshairH);
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mainCanvas.Children.Add(_crosshairV);
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}
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private void RemoveCrosshair()
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{
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if (_crosshairH != null) { mainCanvas.Children.Remove(_crosshairH); _crosshairH = null; }
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if (_crosshairV != null) { mainCanvas.Children.Remove(_crosshairV); _crosshairV = null; }
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}
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#endregion Crosshair
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#region Measurement
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public static readonly DependencyProperty IsMeasuringProperty =
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DependencyProperty.Register(nameof(IsMeasuring), typeof(bool), typeof(PolygonRoiCanvas),
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new PropertyMetadata(false, OnIsMeasuringChanged));
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public bool IsMeasuring
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{
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get => (bool)GetValue(IsMeasuringProperty);
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set => SetValue(IsMeasuringProperty, value);
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}
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private Canvas _measureOverlay;
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private readonly System.Collections.Generic.List<Models.MeasureGroup> _measureGroups = new();
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private Ellipse _pendingDot;
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private Point? _pendingPoint;
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private Ellipse _mDraggingDot;
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private Models.MeasureGroup _mDraggingGroup;
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private bool _mDraggingIsDot1;
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private static void OnIsMeasuringChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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var c = (PolygonRoiCanvas)d;
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if ((bool)e.NewValue)
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{
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c.EnsureMeasureOverlay();
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}
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else
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{
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// 退出测量模式：只清除未完成的临时点，保留已完成的测量线
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if (c._pendingDot != null && c._measureOverlay != null)
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{
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c._measureOverlay.Children.Remove(c._pendingDot);
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c._pendingDot = null;
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}
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c._pendingPoint = null;
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}
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}
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private void EnsureMeasureOverlay()
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{
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if (_measureOverlay != null) return;
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_measureOverlay = new Canvas { IsHitTestVisible = true, Background = Brushes.Transparent };
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_measureOverlay.SetBinding(Canvas.WidthProperty, new System.Windows.Data.Binding("CanvasWidth") { Source = this });
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_measureOverlay.SetBinding(Canvas.HeightProperty, new System.Windows.Data.Binding("CanvasHeight") { Source = this });
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mainCanvas.Children.Add(_measureOverlay);
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}
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private void RemoveMeasureOverlay()
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{
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if (_measureOverlay != null)
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{
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mainCanvas.Children.Remove(_measureOverlay);
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_measureOverlay = null;
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}
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_measureGroups.Clear();
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_pendingDot = null;
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_pendingPoint = null;
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_mDraggingDot = null;
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_mDraggingGroup = null;
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}
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/// <summary>清除所有测量绘制</summary>
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public void ClearMeasurements()
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{
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RemoveMeasureOverlay();
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}
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/// <summary>获取当前测量组数量</summary>
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public int MeasureCount => _measureGroups.Count;
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/// <summary>处理测量模式下的画布点击</summary>
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private void HandleMeasureClick(Point pos)
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{
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if (_measureOverlay == null) EnsureMeasureOverlay();
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if (_measureOverlay == null) return;
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if (!_pendingPoint.HasValue)
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{
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_pendingPoint = pos;
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_pendingDot = CreateMeasureDot(Brushes.Red);
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_measureOverlay.Children.Add(_pendingDot);
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SetMeasureDotPos(_pendingDot, pos);
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RaiseMeasureStatusChanged($"点点距测量 - 第一点: ({pos.X:F0}, {pos.Y:F0})，请点击第二个点");
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}
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else
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{
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var g = CreateMeasureGroup(_pendingPoint.Value, pos);
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_measureGroups.Add(g);
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_measureOverlay.Children.Remove(_pendingDot);
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_pendingDot = null;
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_pendingPoint = null;
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RaiseMeasureCompleted(g);
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// 完成一条测量后自动退出测量模式
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IsMeasuring = false;
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}
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}
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private Models.MeasureGroup CreateMeasureGroup(Point p1, Point p2)
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{
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var g = new Models.MeasureGroup { P1 = p1, P2 = p2 };
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g.Line = new Line { Stroke = Brushes.Lime, StrokeThickness = 2, IsHitTestVisible = false };
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_measureOverlay.Children.Add(g.Line);
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g.Label = new TextBlock { Foreground = Brushes.Yellow, FontSize = 13, FontWeight = FontWeights.Bold, IsHitTestVisible = false };
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_measureOverlay.Children.Add(g.Label);
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g.Dot1 = CreateMeasureDot(Brushes.Red);
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g.Dot2 = CreateMeasureDot(Brushes.Blue);
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_measureOverlay.Children.Add(g.Dot1);
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_measureOverlay.Children.Add(g.Dot2);
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SetMeasureDotPos(g.Dot1, p1);
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SetMeasureDotPos(g.Dot2, p2);
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g.UpdateLine();
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g.UpdateLabel();
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return g;
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}
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private Ellipse CreateMeasureDot(Brush fill)
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{
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var dot = new Ellipse { Width = 12, Height = 12, Fill = fill, Stroke = Brushes.White, StrokeThickness = 1.5, Cursor = Cursors.Hand };
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dot.SetValue(ContextMenuService.IsEnabledProperty, false);
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dot.MouseLeftButtonDown += MDot_Down;
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dot.MouseMove += MDot_Move;
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dot.MouseLeftButtonUp += MDot_Up;
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dot.PreviewMouseRightButtonUp += MDot_RightClick;
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return dot;
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}
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private static void SetMeasureDotPos(Ellipse dot, Point pos)
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{
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Canvas.SetLeft(dot, pos.X - dot.Width / 2);
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Canvas.SetTop(dot, pos.Y - dot.Height / 2);
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}
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private void MDot_Down(object sender, MouseButtonEventArgs e)
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{
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if (sender is not Ellipse dot) return;
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foreach (var g in _measureGroups)
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{
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if (g.Dot1 == dot) { _mDraggingGroup = g; _mDraggingIsDot1 = true; break; }
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if (g.Dot2 == dot) { _mDraggingGroup = g; _mDraggingIsDot1 = false; break; }
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}
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if (_mDraggingGroup != null) { _mDraggingDot = dot; dot.CaptureMouse(); e.Handled = true; }
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}
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private void MDot_Move(object sender, MouseEventArgs e)
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{
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if (_mDraggingDot == null || _mDraggingGroup == null || _measureOverlay == null) return;
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if (e.LeftButton != MouseButtonState.Pressed) return;
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var pos = e.GetPosition(_measureOverlay);
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SetMeasureDotPos(_mDraggingDot, pos);
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if (_mDraggingIsDot1) _mDraggingGroup.P1 = pos; else _mDraggingGroup.P2 = pos;
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_mDraggingGroup.UpdateLine();
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_mDraggingGroup.UpdateLabel();
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RaiseMeasureCompleted(_mDraggingGroup);
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e.Handled = true;
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}
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private void MDot_Up(object sender, MouseButtonEventArgs e)
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{
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if (_mDraggingDot != null) { _mDraggingDot.ReleaseMouseCapture(); _mDraggingDot = null; _mDraggingGroup = null; e.Handled = true; }
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}
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private void MDot_RightClick(object sender, MouseButtonEventArgs e)
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{
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if (sender is not Ellipse dot || _measureOverlay == null) return;
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Models.MeasureGroup target = null;
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foreach (var g in _measureGroups)
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{
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if (g.Dot1 == dot || g.Dot2 == dot) { target = g; break; }
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}
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if (target == null) return;
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_measureOverlay.Children.Remove(target.Dot1);
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_measureOverlay.Children.Remove(target.Dot2);
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_measureOverlay.Children.Remove(target.Line);
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_measureOverlay.Children.Remove(target.Label);
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_measureGroups.Remove(target);
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RaiseMeasureStatusChanged($"已删除测量线 | 剩余 {_measureGroups.Count} 条");
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e.Handled = true;
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}
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// 测量事件
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public static readonly RoutedEvent MeasureCompletedEvent =
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EventManager.RegisterRoutedEvent(nameof(MeasureCompleted), RoutingStrategy.Bubble,
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typeof(RoutedEventHandler), typeof(PolygonRoiCanvas));
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public event RoutedEventHandler MeasureCompleted
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{
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add { AddHandler(MeasureCompletedEvent, value); }
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remove { RemoveHandler(MeasureCompletedEvent, value); }
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}
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private void RaiseMeasureCompleted(Models.MeasureGroup g)
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{
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RaiseEvent(new MeasureCompletedEventArgs(MeasureCompletedEvent, g.P1, g.P2, g.Distance, _measureGroups.Count));
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}
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public static readonly RoutedEvent MeasureStatusChangedEvent =
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EventManager.RegisterRoutedEvent(nameof(MeasureStatusChanged), RoutingStrategy.Bubble,
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typeof(RoutedEventHandler), typeof(PolygonRoiCanvas));
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public event RoutedEventHandler MeasureStatusChanged
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{
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add { AddHandler(MeasureStatusChangedEvent, value); }
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remove { RemoveHandler(MeasureStatusChangedEvent, value); }
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}
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private void RaiseMeasureStatusChanged(string message)
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{
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RaiseEvent(new MeasureStatusEventArgs(MeasureStatusChangedEvent, message));
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}
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|
#endregion Measurement
|
|
|
|
#region Adorner Management
|
|
|
|
private void UpdateAdorner()
|
|
{
|
|
// 移除旧的Adorner
|
|
if (currentAdorner != null)
|
|
{
|
|
var adornerLayer = AdornerLayer.GetAdornerLayer(mainCanvas);
|
|
if (adornerLayer != null)
|
|
{
|
|
adornerLayer.Remove(currentAdorner);
|
|
}
|
|
currentAdorner = null;
|
|
}
|
|
|
|
// 为选中的ROI添加Adorner
|
|
if (SelectedROI != null && SelectedROI.IsSelected)
|
|
{
|
|
// 查找对应的UI元素
|
|
var container = FindROIVisual(SelectedROI);
|
|
if (container != null)
|
|
{
|
|
var adornerLayer = AdornerLayer.GetAdornerLayer(mainCanvas);
|
|
if (adornerLayer != null)
|
|
{
|
|
double scaleFactor = 1.0 / ZoomScale;
|
|
|
|
if (SelectedROI is PolygonROI polygonROI)
|
|
{
|
|
currentAdorner = new PolygonAdorner(container, scaleFactor, polygonROI);
|
|
}
|
|
|
|
if (currentAdorner != null)
|
|
{
|
|
adornerLayer.Add(currentAdorner);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private UIElement? FindROIVisual(ROIShape roi)
|
|
{
|
|
// 在ItemsControl中查找对应的视觉元素
|
|
var itemsControl = FindVisualChild<ItemsControl>(mainCanvas);
|
|
if (itemsControl != null)
|
|
{
|
|
for (int i = 0; i < itemsControl.Items.Count; i++)
|
|
{
|
|
if (itemsControl.Items[i] == roi)
|
|
{
|
|
// 尝试获取容器
|
|
var container = itemsControl.ItemContainerGenerator.ContainerFromIndex(i) as ContentPresenter;
|
|
|
|
// 如果容器还没生成，尝试强制生成
|
|
if (container == null)
|
|
{
|
|
// 强制生成容器
|
|
itemsControl.UpdateLayout();
|
|
container = itemsControl.ItemContainerGenerator.ContainerFromIndex(i) as ContentPresenter;
|
|
}
|
|
|
|
if (container != null)
|
|
{
|
|
// 查找实际的形状元素（只支持多边形）
|
|
if (roi is PolygonROI)
|
|
{
|
|
return FindVisualChild<Polygon>(container);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
private T? FindVisualChild<T>(DependencyObject parent) where T : DependencyObject
|
|
{
|
|
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
|
|
{
|
|
var child = VisualTreeHelper.GetChild(parent, i);
|
|
if (child is T result)
|
|
{
|
|
return result;
|
|
}
|
|
var childOfChild = FindVisualChild<T>(child);
|
|
if (childOfChild != null)
|
|
{
|
|
return childOfChild;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
#endregion Adorner Management
|
|
|
|
#region Mouse Events
|
|
|
|
private void Canvas_MouseWheel(object sender, MouseWheelEventArgs e)
|
|
{
|
|
double oldZoom = ZoomScale;
|
|
double newZoom = e.Delta > 0 ? oldZoom * ZoomStep : oldZoom / ZoomStep;
|
|
newZoom = Math.Max(0.1, Math.Min(10.0, newZoom));
|
|
|
|
if (Math.Abs(newZoom - oldZoom) > 0.001)
|
|
{
|
|
ZoomScale = newZoom;
|
|
// RenderTransformOrigin="0.5,0.5" 保证以图像中心等比缩放
|
|
// 拖拽平移偏移保持不变
|
|
}
|
|
|
|
e.Handled = true;
|
|
}
|
|
|
|
private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
|
|
{
|
|
lastMousePosition = e.GetPosition(imageDisplayGrid);
|
|
isDragging = false;
|
|
mainCanvas.CaptureMouse();
|
|
}
|
|
|
|
private void Canvas_MouseMove(object sender, MouseEventArgs e)
|
|
{
|
|
if (e.LeftButton == MouseButtonState.Pressed && mainCanvas.IsMouseCaptured)
|
|
{
|
|
Point currentPosition = e.GetPosition(imageDisplayGrid);
|
|
Vector delta = currentPosition - lastMousePosition;
|
|
|
|
if (delta.Length > 5)
|
|
{
|
|
isDragging = true;
|
|
PanOffsetX += delta.X;
|
|
PanOffsetY += delta.Y;
|
|
lastMousePosition = currentPosition;
|
|
}
|
|
}
|
|
}
|
|
|
|
private void Canvas_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
|
|
{
|
|
mainCanvas.ReleaseMouseCapture();
|
|
|
|
if (!isDragging)
|
|
{
|
|
Point clickPosition = e.GetPosition(mainCanvas);
|
|
if (IsMeasuring)
|
|
HandleMeasureClick(clickPosition);
|
|
OnCanvasClicked(clickPosition);
|
|
}
|
|
|
|
isDragging = false;
|
|
}
|
|
|
|
private void Canvas_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
|
|
{
|
|
// 右键点击完成多边形
|
|
OnRightClick();
|
|
// 不设 e.Handled，让 ContextMenu 正常弹出
|
|
}
|
|
|
|
private void ROI_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
|
|
{
|
|
// 选择ROI
|
|
if (sender is FrameworkElement element && element.DataContext is ROIShape roi)
|
|
{
|
|
SelectedROI = roi;
|
|
e.Handled = true;
|
|
}
|
|
}
|
|
|
|
#endregion Mouse Events
|
|
|
|
#region Public Methods
|
|
|
|
public void ResetView()
|
|
{
|
|
PanOffsetX = 0;
|
|
PanOffsetY = 0;
|
|
|
|
if (imageDisplayGrid == null || CanvasWidth <= 0 || CanvasHeight <= 0)
|
|
{
|
|
ZoomScale = 1.0;
|
|
return;
|
|
}
|
|
|
|
// 延迟到布局完成后计算，确保 ActualWidth/Height 准确
|
|
Dispatcher.BeginInvoke(new Action(() =>
|
|
{
|
|
double viewW = imageDisplayGrid.ActualWidth;
|
|
double viewH = imageDisplayGrid.ActualHeight;
|
|
|
|
if (viewW > 0 && viewH > 0)
|
|
{
|
|
ZoomScale = Math.Min(viewW / CanvasWidth, viewH / CanvasHeight);
|
|
}
|
|
else
|
|
{
|
|
ZoomScale = 1.0;
|
|
}
|
|
|
|
PanOffsetX = 0;
|
|
PanOffsetY = 0;
|
|
}), System.Windows.Threading.DispatcherPriority.Render);
|
|
}
|
|
|
|
private void BtnZoomIn_Click(object sender, RoutedEventArgs e)
|
|
{
|
|
double newZoom = ZoomScale * 1.2;
|
|
if (newZoom <= 10.0)
|
|
{
|
|
ZoomScale = newZoom;
|
|
PanOffsetX = 0;
|
|
PanOffsetY = 0;
|
|
}
|
|
}
|
|
|
|
private void BtnZoomOut_Click(object sender, RoutedEventArgs e)
|
|
{
|
|
double newZoom = ZoomScale / 1.2;
|
|
if (newZoom >= 0.1)
|
|
{
|
|
ZoomScale = newZoom;
|
|
PanOffsetX = 0;
|
|
PanOffsetY = 0;
|
|
}
|
|
}
|
|
|
|
private void BtnReset_Click(object sender, RoutedEventArgs e)
|
|
{
|
|
ResetView();
|
|
}
|
|
|
|
#endregion Public Methods
|
|
|
|
#region Events
|
|
|
|
public static readonly RoutedEvent CanvasClickedEvent =
|
|
EventManager.RegisterRoutedEvent(nameof(CanvasClicked), RoutingStrategy.Bubble,
|
|
typeof(RoutedEventHandler), typeof(PolygonRoiCanvas));
|
|
|
|
public event RoutedEventHandler CanvasClicked
|
|
{
|
|
add { AddHandler(CanvasClickedEvent, value); }
|
|
remove { RemoveHandler(CanvasClickedEvent, value); }
|
|
}
|
|
|
|
protected virtual void OnCanvasClicked(Point position)
|
|
{
|
|
var args = new CanvasClickedEventArgs(CanvasClickedEvent, position);
|
|
RaiseEvent(args);
|
|
}
|
|
|
|
public static readonly RoutedEvent RightClickEvent =
|
|
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
|
|
}
|
|
} |