public void DrawTriangle(Point corner, double width, double height,
SelectionPosition position)
{
double x1, y1, x2, y2, x3, y3;
x1 = corner.X;
y1 = corner.Y;
switch (position)
{
case SelectionPosition.Top:
x2 = x1 + width / 2;
y2 = y1 + height;
x3 = x1 - width / 2;
y3 = y1 + height;
break;
case SelectionPosition.Bottom:
default:
x2 = x1 + width / 2;
y2 = y1 - height;
x3 = x1 - width / 2;
y3 = y1 - height;
break;
}
SetColor(StrokeColor);
CContext.MoveTo(x1, y1);
CContext.LineTo(x2, y2);
CContext.LineTo(x3, y3);
CContext.ClosePath();
StrokeAndFill();
}
public void DrawRoundedRectangle(Point start, double width, double height, double radius, bool strokeAndFill)
{
double x, y;
x = start.X + LineWidth / 2;
y = start.Y + LineWidth / 2;
height -= LineWidth;
width -= LineWidth;
if ((radius > height / 2) || (radius > width / 2))
{
radius = Math.Min(height / 2, width / 2);
}
CContext.MoveTo(x, y + radius);
CContext.Arc(x + radius, y + radius, radius, Math.PI, -Math.PI / 2);
CContext.LineTo(x + width - radius, y);
CContext.Arc(x + width - radius, y + radius, radius, -Math.PI / 2, 0);
CContext.LineTo(x + width, y + height - radius);
CContext.Arc(x + width - radius, y + height - radius, radius, 0, Math.PI / 2);
CContext.LineTo(x + radius, y + height);
CContext.Arc(x + radius, y + height - radius, radius, Math.PI / 2, Math.PI);
CContext.ClosePath();
if (strokeAndFill)
{
StrokeAndFill();
}
}
public void DrawLine(Point start, Point stop)
{
CContext.LineWidth = LineWidth;
CContext.MoveTo(start.X, start.Y);
CContext.LineTo(stop.X, stop.Y);
StrokeAndFill();
}
public void DrawText(Point point, double width, double height, string text,
bool escape = false, bool ellipsize = false)
{
Layout layout = null;
Pango.Rectangle inkRect, logRect;
if (text == null)
{
return;
}
if (escape)
{
text = GLib.Markup.EscapeText(text);
}
if (context is CairoContext)
{
layout = (context as CairoContext).PangoLayout;
}
if (layout == null)
{
layout = Pango.CairoHelper.CreateLayout(CContext);
}
if (ellipsize)
{
layout.Ellipsize = EllipsizeMode.End;
}
else
{
layout.Ellipsize = EllipsizeMode.None;
}
layout.FontDescription = FontDescription.FromString(
String.Format("{0} {1}px", FontFamily, FontSize));
layout.FontDescription.Weight = fWeight;
layout.FontDescription.Style = fSlant;
layout.Width = Units.FromPixels((int)width);
layout.SetPangoLayoutHeight(Units.FromPixels((int)height));
layout.Alignment = fAlignment;
layout.SetMarkup(text);
SetColor(StrokeColor);
Pango.CairoHelper.UpdateLayout(CContext, layout);
layout.GetPixelExtents(out inkRect, out logRect);
CContext.MoveTo(point.X, point.Y + height / 2 - (double)logRect.Height / 2);
Pango.CairoHelper.ShowLayout(CContext, layout);
CContext.NewPath();
}
public void DrawArea(params Point [] vertices)
{
double x1, y1;
Point initial_point = vertices [0];
CContext.MoveTo(initial_point.X, initial_point.Y);
for (int i = 1; i < vertices.Length; i++)
{
x1 = vertices [i].X;
y1 = vertices [i].Y;
CContext.LineTo(x1, y1);
}
CContext.ClosePath();
StrokeAndFill();
}
public void DrawArea(params Point[] vertices)
{
for (int i = 0; i < vertices.Length - 1; i++)
{
double x1, y1, x2, y2;
x1 = vertices [i].X;
y1 = vertices [i].Y;
x2 = vertices [i + 1].X;
y2 = vertices [i + 1].Y;
CContext.MoveTo(x1, y1);
CContext.LineTo(x2, y2);
}
CContext.ClosePath();
StrokeAndFill();
}
public void ClipRoundRectangle(Point start, double width, double height, double radius)
{
double x, y;
x = start.X;
y = start.Y;
if ((radius > height / 2) || (radius > width / 2))
{
radius = Math.Min(height / 2, width / 2);
}
CContext.MoveTo(x, y + radius);
CContext.Arc(x + radius, y + radius, radius, Math.PI, -Math.PI / 2);
CContext.LineTo(x + width - radius, y);
CContext.Arc(x + width - radius, y + radius, radius, -Math.PI / 2, 0);
CContext.LineTo(x + width, y + height - radius);
CContext.Arc(x + width - radius, y + height - radius, radius, 0, Math.PI / 2);
CContext.LineTo(x + radius, y + height);
CContext.Arc(x + radius, y + height - radius, radius, Math.PI / 2, Math.PI);
CContext.ClosePath();
CContext.Clip();
}
public void DrawArrow(Point start, Point stop, int lenght, double radians, bool closed)
{
double vx1, vy1, vx2, vy2;
double angle = Math.Atan2(stop.Y - start.Y, stop.X - start.X) + Math.PI;
vx1 = stop.X + (lenght + LineWidth) * Math.Cos(angle - radians);
vy1 = stop.Y + (lenght + LineWidth) * Math.Sin(angle - radians);
vx2 = stop.X + (lenght + LineWidth) * Math.Cos(angle + radians);
vy2 = stop.Y + (lenght + LineWidth) * Math.Sin(angle + radians);
CContext.MoveTo(stop.X, stop.Y);
CContext.LineTo(vx1, vy1);
if (!closed)
{
CContext.MoveTo(stop.X, stop.Y);
CContext.LineTo(vx2, vy2);
}
else
{
CContext.LineTo(vx2, vy2);
CContext.ClosePath();
}
StrokeAndFill(false);
}
