本文整理汇总了C#中Cairo.Context.Arc方法的典型用法代码示例。如果您正苦于以下问题：C# Context.Arc方法的具体用法？C# Context.Arc怎么用？C# Context.Arc使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Cairo.Context的用法示例。
在下文中一共展示了Context.Arc方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: draw
static void draw (Context cr, int width, int height)
{
double xc = 0.5;
double yc = 0.5;
double radius = 0.4;
double angle1 = 45.0 * (Math.PI / 180.0); // angles are specified
double angle2 = 180.0 * (Math.PI / 180.0); // in radians
cr.Scale (width, height);
cr.LineWidth = 0.04;
cr.Arc (xc, yc, radius, angle1, angle2);
cr.Stroke ();
// draw helping lines
cr.Color = new Color(1, 0.2, 0.2, 0.6);
cr.Arc (xc, yc, 0.05, 0, 2 * Math.PI);
cr.Fill ();
cr.LineWidth = 0.03;
cr.Arc (xc, yc, radius, angle1, angle1);
cr.LineTo (new PointD (xc, yc));
cr.Arc (xc, yc, radius, angle2, angle2);
cr.LineTo (new PointD (xc, yc));
cr.Stroke ();
}示例2: OnTransformIp
protected override FlowReturn OnTransformIp (Gst.Buffer buf) {
if (!buf.IsWritable)
return FlowReturn.Error;
Cairo.ImageSurface img = new Cairo.ImageSurface (buf.Data, Cairo.Format.Rgb24, width, height, width*4);
using (Cairo.Context context = new Cairo.Context (img)) {
double dx = (double) ( (buf.Timestamp / Clock.MSecond) % 2180) / 5;
context.Save ();
context.Scale (width / 640.0, height / 480.0);
context.MoveTo (300, 10 + dx);
context.LineTo (500 - dx, 400);
context.LineWidth = 4.0;
context.Color = new Color (0, 0, 1.0);
context.Stroke();
context.Restore ();
if (lastX != -1 && lastY != -1) {
context.Color = new Color (1.0, 0, 0);
context.Translate (lastX, lastY);
context.Scale (Math.Min (width / 640.0, height / 480.0), Math.Min (width / 640.0, height / 480.0));
context.Arc (0, 0, 10.0, 0.0, 2 * Math.PI);
context.Fill();
}
}
img.Destroy ();
return base.OnTransformIp (buf);
}示例3: DrawPoints
public static void DrawPoints(List<PointD> points,Context cr)
{
foreach (PointD p in points){
cr.MoveTo(p);
cr.SetSourceRGB (0.3, 0.3, 0.3);
cr.Arc (p.X, p.Y, 2, 0, 2 * Math.PI);
cr.Fill ();
}
}示例4: OvalPath
void OvalPath (Context cr, double xc, double yc, double xr, double yr)
{
Matrix m = cr.Matrix;
cr.Translate (xc, yc);
cr.Scale (1.0, yr / xr);
cr.MoveTo (xr, 0.0);
cr.Arc (0, 0, xr, 0, 2 * Math.PI);
cr.ClosePath ();
cr.Matrix = m;
}示例5: draw
public void draw(Context cr)
{
Triangle t = model.tri;
switch (model.alignment) {
case ActiveTriangle.TriangleAlignment.ChaoticEvil:
cr.SetSourceRGB (0.5, 0, 0);
break;
case ActiveTriangle.TriangleAlignment.TrueNeutral:
cr.SetSourceRGB (0, 0.8, 0);
break;
default:
cr.SetSourceRGB (1.0, 1.0, 0);
break;
}
cr.LineWidth = 1.1;
cr.MoveTo (t.a);
cr.LineTo (t.b);
cr.MoveTo (t.b);
cr.LineTo (t.c);
cr.MoveTo (t.c);
cr.LineTo (t.a);
cr.Stroke ();
cr.Fill();
Tuple<PointD,PointD,PointD,PointD> points;
points = model.getSharpestPointAndAssociatedMidpointAndDullestPoints ();
PointD sharpest = points.Item1;
PointD midPoint = points.Item2;
cr.SetSourceRGB (1.0, 0.3, 0.3);
cr.Arc (sharpest.X, sharpest.Y, 2, 0, 2 * Math.PI);
cr.Fill ();
cr.Arc (midPoint.X, midPoint.Y, 2, 0, 2 * Math.PI);
cr.Fill ();
}示例6: Draw
public override void Draw(Context context)
{
double middle = DisplayBox.Width / 2.0;
context.LineWidth = LineWidth;
context.Save ();
context.Translate (DisplayBox.X + middle, DisplayBox.Y + middle);
context.Arc (0.0, 0.0, middle, 0.0, 2.0 * Math.PI);
context.Restore ();
context.Color = new Cairo.Color (1.0, 1.0, 0.2, 0.2);
context.FillPreserve ();
context.Color = new Cairo.Color (0.0, 0.0, 0.0, 1.0);
context.Stroke ();
}示例7: arc
public void arc(Context cr, int width, int height)
{
PointD c = new PointD (0.5, 0.5);
double radius = 0.4;
double angle1 = 45.0 * (Math.PI/180.0); /* angles are specified */
double angle2 = 180.0 * (Math.PI/180.0); /* in radians */
Normalize(cr, width, height);
cr.Arc(c.X, c.Y, radius, angle1, angle2);
cr.Stroke();
// draw helping lines
cr.Color = new Color (1, 0.2, 0.2, 0.6);
cr.Arc(c.X, c.Y, 0.05, 0, 2*Math.PI);
cr.Fill();
cr.LineWidth = 0.03;
cr.Arc(c.X, c.Y, radius, angle1, angle1);
cr.LineTo(c);
cr.Arc(c.X, c.Y, radius, angle2, angle2);
cr.LineTo(c);
cr.Stroke();
}示例8: Draw
public override void Draw (Context context, IDrawingView view) {
RectangleD rect = ViewDisplayBox(view);
double middle = rect.Width / 2.0;
context.LineWidth = LineWidth;
context.Save ();
context.Translate (rect.X + middle, rect.Y + middle);
context.Arc (0.0, 0.0, middle, 0.0, 2.0 * Math.PI);
context.Restore ();
context.Color = new Cairo.Color (0.2, 0.2, 1.0, 0.5);
context.FillPreserve ();
context.Color = new Cairo.Color (0.0, 0.0, 0.0, 1.0);
context.Stroke ();
}示例9: BasicDraw
public override void BasicDraw (Context context) {
double midwidth = DisplayBox.Width / 2.0;
double midheight = DisplayBox.Height / 2.0;
context.LineWidth = LineWidth;
context.Save ();
context.Translate (DisplayBox.X + midwidth, DisplayBox.Y + midheight);
context.Scale (midwidth - 1.0, midheight - 1.0);
context.Arc (0.0, 0.0, 1.0, 0.0, 2.0 * Math.PI);
context.Restore ();
context.Color = FillColor;
context.FillPreserve ();
context.Color = LineColor;
context.Stroke ();
}示例10: Draw
public static void Draw (Context grw, ArcElement arc)
{
if (arc.Foregraund != null) {
grw.SetSourceRGB (
arc.Foregraund.Red,
arc.Foregraund.Green,
arc.Foregraund.Blue);
}
grw.Arc (
arc.Center.GeometryX,
arc.Center.GeometryY,
arc.GeometryRadius,
arc.ArcStart,
arc.ArcStop);
grw.Stroke ();
}示例11: DrawVertexStructure
public static void DrawVertexStructure(VertexStructure vs, Context cr)
{
VertexStructure head = vs;
int i = 0;
do {
cr.MoveTo (vs.v);
cr.SetSourceRGB (0, 0, 0.8);
cr.Arc (vs.v.X, vs.v.Y, 2, 0, 2 * Math.PI);
cr.Fill ();
cr.LineWidth = 1;
cr.MoveTo (vs.v);
cr.LineTo(vs.next.v);
cr.Stroke();
vs = vs.next;
//Logger.Log("Meh..." + i);
i++;
} while(!ReferenceEquals(vs,head));
}示例12: OnMouseMove
protected override Gdk.Rectangle OnMouseMove (Context g, Color strokeColor, ImageSurface surface,
int x, int y, int lastX, int lastY)
{
int dx = x - lastX;
int dy = y - lastY;
double d = Math.Sqrt (dx * dx + dy * dy) * 2.0;
double cx = Math.Floor (x / 100.0) * 100 + 50;
double cy = Math.Floor (y / 100.0) * 100 + 50;
int steps = Random.Next (1, 10);
double step_delta = d / steps;
for (int i = 0; i < steps; i++) {
g.Arc (cx, cy, (steps - i) * step_delta, 0, Math.PI * 2);
g.Stroke ();
}
return Gdk.Rectangle.Zero;
}示例13: Draw
public static void Draw(Context grw, Connector con)
{
var c = con.Selected ? AppController.Instance.Config.SelectedConnectorColor :
!con.ConnectedTo.Any() ?
con.Foregraund :
AppController.Instance.Config.ConnectedColor;
if ( c != null) {
grw.SetSourceRGB (
c.Red,
c.Green,
c.Blue);
}
grw.Arc (
con.Center.GeometryX,
con.Center.GeometryY,
con.GeometryRadius,
0, 2 * Math.PI);
grw.StrokePreserve ();
grw.Fill ();
}示例14: ShapeSurface
protected virtual void ShapeSurface(Context cr, Cairo.Color color)
{
cr.Operator = Operator.Source;
Cairo.Pattern p = new Cairo.SolidPattern (new Cairo.Color (0, 0, 0, 0));
cr.Source = p;
p.Destroy ();
cr.Paint ();
cr.Operator = Operator.Over;
Cairo.Pattern r = new SolidPattern (color);
cr.Source = r;
r.Destroy ();
cr.MoveTo (round, 0);
if (x_align == 1.0)
cr.LineTo (Allocation.Width, 0);
else
cr.Arc (Allocation.Width - round, round, round, - Math.PI * 0.5, 0);
if (x_align == 1.0 || y_align == 1.0)
cr.LineTo (Allocation.Width, Allocation.Height);
else
cr.Arc (Allocation.Width - round, Allocation.Height - round, round, 0, Math.PI * 0.5);
if (y_align == 1.0)
cr.LineTo (0, Allocation.Height);
else
cr.Arc (round, Allocation.Height - round, round, Math.PI * 0.5, Math.PI);
cr.Arc (round, round, round, Math.PI, Math.PI * 1.5);
cr.ClosePath ();
cr.Fill ();
}示例15: DrawCloseButton
static void DrawCloseButton (Context context, Gdk.Point center, bool hovered, double opacity, double animationProgress)
{
if (hovered) {
const double radius = 6;
context.Arc (center.X, center.Y, radius, 0, Math.PI * 2);
context.SetSourceRGBA (.6, .6, .6, opacity);
context.Fill ();
context.SetSourceRGBA (0.95, 0.95, 0.95, opacity);
context.LineWidth = 2;
context.MoveTo (center.X - 3, center.Y - 3);
context.LineTo (center.X + 3, center.Y + 3);
context.MoveTo (center.X - 3, center.Y + 3);
context.LineTo (center.X + 3, center.Y - 3);
context.Stroke ();
} else {
double lineColor = .63 - .1 * animationProgress;
const double fillColor = .74;
double heightMod = Math.Max (0, 1.0 - animationProgress * 2);
context.MoveTo (center.X - 3, center.Y - 3 * heightMod);
context.LineTo (center.X + 3, center.Y + 3 * heightMod);
context.MoveTo (center.X - 3, center.Y + 3 * heightMod);
context.LineTo (center.X + 3, center.Y - 3 * heightMod);
context.LineWidth = 2;
context.SetSourceRGBA (lineColor, lineColor, lineColor, opacity);
context.Stroke ();
if (animationProgress > 0.5) {
double partialProg = (animationProgress - 0.5) * 2;
context.MoveTo (center.X - 3, center.Y);
context.LineTo (center.X + 3, center.Y);
context.LineWidth = 2 - partialProg;
context.SetSourceRGBA (lineColor, lineColor, lineColor, opacity);
context.Stroke ();
double radius = partialProg * 3.5;
// Background
context.Arc (center.X, center.Y, radius, 0, Math.PI * 2);
context.SetSourceRGBA (fillColor, fillColor, fillColor, opacity);
context.Fill ();
// Inset shadow
using (var lg = new LinearGradient (0, center.Y - 5, 0, center.Y)) {
context.Arc (center.X, center.Y + 1, radius, 0, Math.PI * 2);
lg.AddColorStop (0, new Cairo.Color (0, 0, 0, 0.2 * opacity));
lg.AddColorStop (1, new Cairo.Color (0, 0, 0, 0));
context.SetSource (lg);
context.Stroke ();
}
// Outline
context.Arc (center.X, center.Y, radius, 0, Math.PI * 2);
context.SetSourceRGBA (lineColor, lineColor, lineColor, opacity);
context.Stroke ();
}
}
}