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using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
namespace WpfStreamGeometryCSharp
{
/// <summary>
/// Logique d'interaction pour Window3.xaml
/// </summary>
public partial class Window3 : Window
{
private Geometry myGeom;
Path tempPath ;
public Window3()
{
InitializeComponent();
}
private void btnDisplaySegements_Click(object sender, RoutedEventArgs e)
{
// clear textbox
this.txtGeometry.Clear();
// recupere le geometry du clip
myGeom = this.mainCanvas.Clip;
// obtient le "flatten" PathGeometry du clip
PathGeometry flattenGeometry = myGeom.GetFlattenedPathGeometry();
// enumere simplement figures composants "flatten" PathGeometry
foreach (System.Windows.Media.PathFigure fig in flattenGeometry.Figures)
{
foreach (PathSegment seg in fig.Segments)
{
this.txtGeometry.Text = this.txtGeometry.Text + seg.ToString() + Environment.NewLine;
//il faut switcher sur les elements suivant le
//nom API pour identification
switch (seg.ToString())
{
case "System.Windows.Media.LineSegment":
this.txtGeometry.Text = this.txtGeometry.Text + seg.ToString() + Environment.NewLine;
LineSegment segLine = (LineSegment)seg;
this.txtGeometry.Text = this.txtGeometry.Text +
segLine.Point.X.ToString() + "," + segLine.Point.Y.ToString() + Environment.NewLine;
break;
case "System.Windows.Media.PolyBezierSegment":
break;
case "System.Windows.Media.PolyLineSegment":
this.txtGeometry.Text = this.txtGeometry.Text +
seg.ToString() + " :" + Environment.NewLine;
PolyLineSegment segPoly = (PolyLineSegment)seg;
foreach (Point ptItem in segPoly.Points)
{
this.txtGeometry.Text = this.txtGeometry.Text +
ptItem.X.ToString() + "," + ptItem.Y.ToString() + Environment.NewLine;
}
break;
case "System.Windows.Media.ArcSegment":
break;
default:
this.txtGeometry.Text = "entite geometry inconnue...et autres PolyQuadraticBezierSegment,QuadraticBezierSegment etc...";
break;
}
}
}
}
private void btnModifyGeomClip_Click(object sender, RoutedEventArgs e)
{
// clear textbox
this.txtGeometry.Clear();
// recupere le geometry du clip
myGeom = this.mainCanvas.Clip;
// erase le geometry clip existant
this.mainCanvas.Clip = null;
// obtient le "flatten" PathGeometry du clip
PathGeometry flattenGeometry = myGeom.GetFlattenedPathGeometry();
// necessaire pir storer les figures de remplacement
// car enumerator collection ne permet pas de modifier
// la collection
PathFigure newFigure;
PathFigureCollection newListFigures =new PathFigureCollection ();
// parcours "flatten" PathGeometry et enumere les
//ses composantes : "PolyLineSegmentChose..."
foreach (System.Windows.Media.PathFigure fig in flattenGeometry.Figures)
{
newFigure = new PathFigure();
foreach (PathSegment seg in fig.Segments)
{
//this.txtGeometry.Text = this.txtGeometry.Text + seg.ToString() + Environment.NewLine;
//il faut switcher sur les elements suivant le
//nom API pour identification
switch (seg.ToString())
{
case "System.Windows.Media.LineSegment":
this.txtGeometry.Text = this.txtGeometry.Text+
seg.ToString() + " :" + Environment.NewLine;
LineSegment segLine = (LineSegment)seg;
this.txtGeometry.Text = this.txtGeometry.Text +
segLine.Point.X.ToString() + "," + segLine.Point.Y.ToString() + Environment.NewLine;
//note le new
segLine = new LineSegment();
Point pt = new Point(40, 40);
segLine.Point = pt;
segLine.IsStroked = true;
newFigure.Segments.Add(segLine);
newListFigures.Add(newFigure);
break;
case "System.Windows.Media.PolyBezierSegment":
this.txtGeometry.Text = this.txtGeometry.Text +
seg.ToString() + " :" + Environment.NewLine;
PolyBezierSegment segPolyBezier = (PolyBezierSegment)seg;
foreach (Point ptItem in segPolyBezier.Points)
{
this.txtGeometry.Text = this.txtGeometry.Text +
ptItem.X.ToString() + "," + ptItem.Y.ToString() + Environment.NewLine;
}
//note le new
segPolyBezier =new PolyBezierSegment();
segPolyBezier.Points.Add(new Point(40, 40));
segPolyBezier.Points.Add(new Point(100, 40));
segPolyBezier.Points.Add(new Point(150, 80));
segPolyBezier.Points.Add(new Point(40, 80));
segPolyBezier.Points.Add(new Point(40, 40));
segPolyBezier.IsStroked = true;
newFigure.Segments.Add(segPolyBezier);
newListFigures.Add(newFigure);
break;
case "System.Windows.Media.PolyLineSegment":
this.txtGeometry.Text = this.txtGeometry.Text +
seg.ToString() + " :" + Environment.NewLine;
PolyLineSegment segPoly = (PolyLineSegment)seg;
foreach (Point ptItem in segPoly.Points)
{
this.txtGeometry.Text = this.txtGeometry.Text +
ptItem.X.ToString() + "," + ptItem.Y.ToString() + Environment.NewLine;
}
//note le new
segPoly =new PolyLineSegment();
segPoly.Points.Add(new Point(40, 40));
segPoly.Points.Add(new Point(100, 40));
segPoly.Points.Add(new Point(150, 80));
segPoly.Points.Add(new Point(40, 80));
segPoly.Points.Add(new Point(40, 40));
segPoly.IsStroked = true;
newFigure.Segments.Add(segPoly);
newListFigures.Add(newFigure);
break;
case "System.Windows.Media.ArcSegment":
this.txtGeometry.Text = this.txtGeometry.Text +
seg.ToString() + " :" + Environment.NewLine;
ArcSegment segArc = (ArcSegment)seg;
this.txtGeometry.Text = this.txtGeometry.Text +
segArc.Point.X.ToString() + "," + segArc.Point.Y.ToString()
+ " Size :" + segArc.Size.Width.ToString() + "," + segArc.Size.Height.ToString() + Environment.NewLine;
//note le new
segArc =new ArcSegment();
segArc.Size = new Size(30, 30);
segArc.Point = new Point(60, 60);
segArc.IsLargeArc = true;
segArc.IsStroked = true;
newFigure.Segments.Add(segArc);
newListFigures.Add(newFigure);
break;
default:
this.txtGeometry.Text = "entite geometry inconnue...et autres PolyQuadraticBezierSegment,QuadraticBezierSegment etc...";
break;
}
}
}
// Clear old figures
flattenGeometry.Figures.Clear();
// ajoute nouvelle collection figures à flattenGeometry
flattenGeometry.Figures = newListFigures;
//cree un nouveau path à partir du flattenGeometry
//modifie Fill ,Brush et Stroke du nouveau path
tempPath = new Path();
flattenGeometry.FillRule = FillRule.EvenOdd;
tempPath.Data = flattenGeometry;
tempPath.Fill = Brushes.Yellow;
tempPath.Stroke = Brushes.Black;
tempPath.StrokeThickness = 2.0;
//Canvas.SetLeft(tempPath, 0);
//Canvas.SetTop(tempPath, 0);
//this.mainCanvas.Children.Add(tempPath);
this.mainCanvas.Clip = tempPath.Data;
}
//ajoute un shape Ellipse pour voir l'effet de la modification du clip
private void btnAddFigure_Click(object sender, RoutedEventArgs e)
{
Ellipse myCircle = new Ellipse();
myCircle.Fill = Brushes.HotPink;
myCircle.Stroke = Brushes.Black;
myCircle.StrokeThickness = 4.0;
myCircle.Width = 100;
myCircle.Height = 100;
Canvas.SetLeft(myCircle, 50);
Canvas.SetTop(myCircle, 50);
this.mainCanvas.Children.Add(myCircle);
}
}
} |
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