zhusenlin/aistudio-wpf-diagram
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可擦除完成，需要实现画笔，是不是还得用ink来做比较好

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艾竹
2023-05-10 22:46:39 +08:00
parent f19d6c20ef
commit adf1ee0805
4 changed files with 143 additions and 44 deletions
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4
AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/DrawingDesignerItemViewModelBase.cs
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@@ -34,6 +34,7 @@ namespace AIStudio.Wpf.DiagramDesigner
DrawMode = drawMode;
Points = points;
Erasable = erasable;
DisableSelected = Erasable;
}
public virtual bool OnMouseMove(IInputElement sender, MouseEventArgs e)
@@ -66,7 +67,7 @@ namespace AIStudio.Wpf.DiagramDesigner
public virtual bool Erase(Geometry erase)
{
if (Erasable)
if (Erasable && Keyboard.IsKeyDown(Key.LeftShift) == false)
{
erase.Transform = new TranslateTransform(0 - Left, 0 - Top);
Geometry = Geometry.Combine(Geometry, erase, GeometryCombineMode.Exclude, null);
@@ -135,7 +136,6 @@ namespace AIStudio.Wpf.DiagramDesigner
protected override void Init(IDiagramViewModel root, bool initNew)
{
base.Init(root, initNew);
IsHitTestVisible = false;
}
protected override void InitNew()

69
AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EraserDrawingDesignerItemViewModel.cs
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@@ -4,6 +4,7 @@ using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using SvgPathProperties;
@@ -29,39 +30,8 @@ namespace AIStudio.Wpf.DiagramDesigner
}
public override bool OnMouseMove(IInputElement sender, MouseEventArgs e)
{
if (e.RightButton == MouseButtonState.Pressed)
{
var point = e.GetPosition(sender);
if (Points == null || Points.Count == 0)//没有起始点
{
return true;
}
if ((Points.LastOrDefault() - point).Length < ColorViewModel.LineWidth)
{
return true;
}
Points.Add(point);
if (Geometry is PathGeometry geometry)
{
}
else
{
geometry = new PathGeometry();
var figure = new PathFigure { StartPoint = Points[0] };
geometry.Figures.Add(figure);
}
LineSegment arc = new LineSegment(point, true);// { IsSmoothJoin = true };
geometry.Figures[0].Segments.Add(arc);
Geometry = geometry;
return true;
}
else if (e.LeftButton == MouseButtonState.Pressed)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
var point = e.GetPosition(sender);
if (Points == null || Points.Count == 0)//没有起始点
@@ -75,18 +45,37 @@ namespace AIStudio.Wpf.DiagramDesigner
}
var geometry = new PathGeometry();
var figure = new PathFigure { StartPoint = Points[0] };
var figure = new PathFigure { IsClosed = true, IsFilled = true };
geometry.Figures.Add(figure);
LineSegment arc = new LineSegment(point, true);// { IsSmoothJoin = true };
geometry.Figures[0].Segments.Add(arc);
var radius = ColorViewModel.LineWidth / 2;
var positiveX = radius * (point.X > Points[0].X ? 1 : -1);
var positiveY = radius * (point.Y > Points[0].Y ? 1 : -1);
figure.StartPoint = new Point(Points[0].X - positiveX, Points[0].Y - positiveY);
var line = new LineSegment(new Point(Points[0].X + positiveX, Points[0].Y - positiveY), false);
figure.Segments.Add(line);
line = new LineSegment(new Point(point.X + positiveX, point.Y - positiveY), false);
figure.Segments.Add(line);
line = new LineSegment(new Point(point.X + positiveX, point.Y + positiveY), false);
figure.Segments.Add(line);
line = new LineSegment(new Point(point.X - positiveX, point.Y + positiveY), false);
figure.Segments.Add(line);
line = new LineSegment(new Point(Points[0].X - positiveX, Points[0].Y + positiveY), false);
figure.Segments.Add(line);
Geometry = geometry;
Points[0] = point;
Erase(Geometry);
return true;
}
else
{
return false;
@@ -100,10 +89,6 @@ namespace AIStudio.Wpf.DiagramDesigner
public override bool OnMouseUp(IInputElement sender, MouseButtonEventArgs e)
{
if (Geometry != null)
{
Erase(Geometry);
}
return base.OnMouseUp(sender, e);
}
@@ -113,7 +98,7 @@ namespace AIStudio.Wpf.DiagramDesigner
List<DrawingDesignerItemViewModelBase> deleteDrawGeometries = new List<DrawingDesignerItemViewModelBase>();
foreach (var g in this.Root.Items.OfType<DrawingDesignerItemViewModelBase>())
{
if (g.Erase(geometry))
if (g.Erase(geometry.CloneCurrentValue()))
deleteDrawGeometries.Add(g);
else
empty = false;

105
AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EraserPreviewDrawingDesignerItemViewModel.cs Normal file
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@@ -0,0 +1,105 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using SvgPathProperties;
namespace AIStudio.Wpf.DiagramDesigner
{
public class EraserPreviewDrawingDesignerItemViewModel : DrawingDesignerItemViewModelBase
{
public EraserPreviewDrawingDesignerItemViewModel()
{
}
public EraserPreviewDrawingDesignerItemViewModel(IDiagramViewModel root) : base(root)
{
}
public EraserPreviewDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint) : base(root, DrawMode.Eraser, startPoint, true)
{
}
public EraserPreviewDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points) : base(root, DrawMode.Eraser, points, true)
{
}
public override bool OnMouseMove(IInputElement sender, MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
var point = e.GetPosition(sender);
if (Points == null || Points.Count == 0)//没有起始点
{
return true;
}
if ((Points.LastOrDefault() - point).Length < ColorViewModel.LineWidth)
{
return true;
}
Points.Add(point);
if (Geometry is PathGeometry geometry)
{
}
else
{
geometry = new PathGeometry();
var figure = new PathFigure { StartPoint = Points[0] };
geometry.Figures.Add(figure);
}
LineSegment arc = new LineSegment(point, true) { IsSmoothJoin = true };
geometry.Figures[0].Segments.Add(arc);
Geometry = geometry;
return true;
}
else
{
return false;
}
}
public override bool OnMouseDown(IInputElement sender, MouseButtonEventArgs e)
{
return true;
}
public override bool OnMouseUp(IInputElement sender, MouseButtonEventArgs e)
{
if (Geometry != null)
{
Erase(Geometry);
}
return base.OnMouseUp(sender, e);
}
private new bool Erase(Geometry geometry)
{
var empty = true;
List<DrawingDesignerItemViewModelBase> deleteDrawGeometries = new List<DrawingDesignerItemViewModelBase>();
foreach (var g in this.Root.Items.OfType<DrawingDesignerItemViewModelBase>())
{
if (g.Erase(geometry.GetWidenedPathGeometry(new Pen(ColorObject.ToBrush(ColorViewModel.LineColor), ColorViewModel.LineWidth))))
deleteDrawGeometries.Add(g);
else
empty = false;
}
foreach (var g in deleteDrawGeometries)
{
this.Root.Remove(g);
}
return empty;
}
}
}