Wpf 使用DrawingContext绘制曲线
我正在尝试创建一个自定义控件来使用WPF绘制曲线 我创建了一个从控件继承的控件:Wpf 使用DrawingContext绘制曲线,wpf,drawingcontext,Wpf,Drawingcontext,我正在尝试创建一个自定义控件来使用WPF绘制曲线 我创建了一个从控件继承的控件: public class Courbe : Control { private static readonly CultureInfo CI = new CultureInfo("en-US"); private Pen _p = new Pen(); public Courbe() { Points = new List<Point>(); }
public class Courbe : Control {
private static readonly CultureInfo CI = new CultureInfo("en-US");
private Pen _p = new Pen();
public Courbe() {
Points = new List<Point>();
}
static Courbe() {
DefaultStyleKeyProperty.OverrideMetadata(typeof(Courbe), new FrameworkPropertyMetadata(typeof(Courbe)));
}
protected override void OnRender(DrawingContext drawingContext) {
base.OnRender(drawingContext);
EcritureEvenement.loggerEvenement("verif point...", TypesEvenements.DEBUG, "");
if (Points.Count <= 1) return;
EcritureEvenement.loggerEvenement("plus d'un point", TypesEvenements.DEBUG, "");
OffsetX = (int)Math.Ceiling(Width / 11);
OffsetY = (int)Math.Ceiling(Height / 11);
double differenceX = MaxX - MinX;
double differenceY = MaxY - MinY;
double rapportTailleDifferenceX = (Width) / differenceX;
double rapportTailleDifferenceY = (Height) / differenceY;
double xMinLigne = rapportTailleDifferenceX * MinX + OffsetX;
double xMaxLigne = rapportTailleDifferenceX * MaxX + OffsetX;
double yMinLigne = (Height - (rapportTailleDifferenceY * (MinY - MinY)) - OffsetY);
double yMaxLigne = (Height - (rapportTailleDifferenceY * (MaxY - MinY)) - OffsetY);
Point debutAxeX = new Point(xMinLigne, yMinLigne);
Point finAxeX = new Point(xMaxLigne, yMinLigne);
Point debutAxeY = new Point(xMinLigne, yMinLigne);
Point finAxeY = new Point(xMinLigne, yMaxLigne);
drawingContext.DrawLine(_p, debutAxeX, finAxeX);
drawingContext.DrawLine(_p, debutAxeY, finAxeY);
int taillePolice = (int)Math.Floor(Width / 80);
double dizieme = differenceY / 10;
for (int i = 0; i < 10; i++) {
float pointGraduation = (float)(Height - ((dizieme * i) * rapportTailleDifferenceY) - OffsetY);
FormattedText texte = new FormattedText(dizieme * i + MinY + "", CI, FlowDirection.LeftToRight, new Typeface("Verdana"), taillePolice, Brushes.Black);
drawingContext.DrawText(texte, new Point(0, pointGraduation - taillePolice));
Point p1 = new Point(xMinLigne - 5, pointGraduation);
Point p2 = new Point(xMinLigne + 5, pointGraduation);
drawingContext.DrawLine(_p, p1, p2);
}
PathFigure pf = new PathFigure();
foreach (Point p in Points) {
double x1 = (p.X * rapportTailleDifferenceX) + OffsetX;
double y1 = Height - ((p.Y - MinY) * rapportTailleDifferenceY) - OffsetY;
Point scaledPoint = new Point((float)x1, (float)y1);
PathSegment ps = new LineSegment(scaledPoint, false);
pf.Segments.Add(ps);
}
Geometry g = new PathGeometry(new[]{pf});
drawingContext.DrawGeometry(Brushes.Aqua, new Pen(Brushes.Blue, 5), g);
}
#region Properties
public List<Point> Points { get; set; }
public int MinX { get; set; }
public int MaxX { get; set; }
public int MinY { get; set; }
public int MaxY { get; set; }
public int OffsetX { get; set; }
public int OffsetY { get; set; }
private Color _penColor;
public Color PenColor {
get { return _penColor; }
set {
_p = new Pen(new SolidColorBrush(value), 5);
_penColor = value;
}
}
#endregion
}
但在性能方面,它比windows窗体中的Graphics.DrawCurve慢2倍左右。有没有办法让它更快
Edit2:我没有尝试使用本机控件,因为当我在windows窗体(图表)中尝试使用本机控件时,该控件无法处理该过程(每~50毫秒绘制约5000行)。问题是,在调用
LineSegment
构造函数时,您将isStroked
设置为false
改变
PathSegment ps = new LineSegment(scaledPoint, false);
到
非常感谢。我明天会试试的,我没注意到那很好!处理时间与DrawCurve大致相同。
PathSegment ps = new LineSegment(scaledPoint, false);
PathSegment ps = new LineSegment(scaledPoint, true);