protected void TestDrawing2(Xwt.Drawing.Context ctx, double x, double y)
{
ctx.Save();
ctx.Translate(x, y);
var arcColor = new Color(1, 0, 1);
ctx.Arc(100, 100, 15, 0, 360);
ctx.ClosePath();
arcColor.Alpha = 0.4;
ctx.SetColor(arcColor);
ctx.StrokePreserve();
ctx.Fill();
ctx.Restore();
}
public virtual void Curves1(Context ctx, double x, double y)
{
ctx.Save ();
ctx.Translate (x, y);
ctx.SetLineWidth (1);
Action curve1 = () => {
ctx.MoveTo (0, 30);
ctx.CurveTo (20, 0, 50, 0, 60, 25);
};
// curve2 with lineTo; curve1 is closed
Action curve2 = () => {
ctx.LineTo (0, 0);
ctx.CurveTo (20, 30, 50, 30, 60, 5);
};
Action paint = () => {
curve1 ();
curve2 ();
ctx.ClosePath ();
ctx.SetColor (new Color (0, 0, 0, .5));
ctx.StrokePreserve ();
ctx.SetColor (new Color (1, 0, 1, .5));
ctx.Fill ();
};
paint ();
ctx.Translate (0, 40);
// curve2 with moveTo; curve1 is open
curve2 = () => {
ctx.MoveTo (0, 0);
ctx.CurveTo (20, 30, 50, 30, 60, 5);
};
paint ();
ctx.Restore ();
//Todo: same stuff with arc
}
public virtual void Rectangles (Context ctx, double x, double y)
{
ctx.Save ();
ctx.Translate (x, y);
// Simple rectangles
ctx.SetLineWidth (1);
ctx.Rectangle (0, 0, 10, 10);
ctx.SetColor (Colors.Black);
ctx.Fill ();
ctx.Rectangle (15, 0, 10, 10);
ctx.SetColor (Colors.Black);
ctx.Stroke ();
ctx.SetLineWidth (3);
ctx.Rectangle (0, 15, 10, 10);
ctx.SetColor (Colors.Black);
ctx.Fill ();
ctx.Rectangle (15, 15, 10, 10);
ctx.SetColor (Colors.Black);
ctx.Stroke ();
ctx.Restore ();
// Rectangle with hole
ctx.Save ();
ctx.Translate (x + 50, y);
ctx.Rectangle (0, 0, 40, 40);
ctx.MoveTo (35, 35);
ctx.RelLineTo (0, -20);
ctx.RelLineTo (-20, 0);
ctx.RelLineTo (0, 20);
ctx.ClosePath ();
ctx.SetColor (Colors.Black);
ctx.Fill ();
ctx.Restore ();
// Rounded Rectangle with Arcs
ctx.Save ();
ctx.Translate (x + 120, y);
var r = 5;
var l = 0;
var t = 0;
var w = 50;
var h = 30;
ctx.SetColor (Colors.Black);
// top left
ctx.Arc (l + r, t + r, r, 180, 270);
// top right
ctx.Arc (l + w - r, t + r, r, 270, 0);
// bottom right
ctx.Arc (l + w - r, t + h - r, r, 0, 90);
// bottom left
ctx.Arc (l + r, t + h - r, r, 90, 180);
ctx.ClosePath ();
ctx.StrokePreserve ();
ctx.SetColor (Colors.AntiqueWhite);
ctx.Fill ();
ctx.Restore ();
}
/// <summary>
/// Draws the arrow on a plot surface.
/// </summary>
/// <param name="ctx">the Drawing Context with which to draw</param>
/// <param name="xAxis">The X-Axis to draw against.</param>
/// <param name="yAxis">The Y-Axis to draw against.</param>
public void Draw(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis )
{
if (To.X > xAxis.Axis.WorldMax || To.X < xAxis.Axis.WorldMin) {
return;
}
if (To.Y > yAxis.Axis.WorldMax || To.Y < yAxis.Axis.WorldMin) {
return;
}
ctx.Save ();
TextLayout layout = new TextLayout ();
layout.Font = textFont_;
layout.Text = text_;
double angle = angle_;
if (angle_ < 0.0) {
int mul = -(int)(angle_ / 360.0) + 2;
angle = angle_ + 360.0 * (double)mul;
}
double normAngle = (double)angle % 360.0; // angle in range 0 -> 360.
Point toPoint = new Point (
xAxis.WorldToPhysical (to_.X, true).X,
yAxis.WorldToPhysical (to_.Y, true).Y);
double xDir = Math.Cos (normAngle * 2.0 * Math.PI / 360.0);
double yDir = Math.Sin (normAngle * 2.0 * Math.PI / 360.0);
toPoint.X += xDir*headOffset_;
toPoint.Y += yDir*headOffset_;
double xOff = physicalLength_ * xDir;
double yOff = physicalLength_ * yDir;
Point fromPoint = new Point(
(int)(toPoint.X + xOff),
(int)(toPoint.Y + yOff) );
ctx.SetLineWidth (1);
ctx.SetColor (arrowColor_);
ctx.MoveTo (fromPoint);
ctx.LineTo (toPoint);
ctx.Stroke ();
xOff = headSize_ * Math.Cos ((normAngle-headAngle_/2) * 2.0 * Math.PI / 360.0);
yOff = headSize_ * Math.Sin ((normAngle-headAngle_/2) * 2.0 * Math.PI / 360.0);
ctx.LineTo (toPoint.X + xOff, toPoint.Y + yOff);
double xOff2 = headSize_ * Math.Cos ((normAngle+headAngle_/2) * 2.0 * Math.PI / 360.0);
double yOff2 = headSize_ * Math.Sin ((normAngle+headAngle_/2) * 2.0 * Math.PI / 360.0);
ctx.LineTo (toPoint.X + xOff2, toPoint.Y + yOff2);
ctx.LineTo (toPoint);
ctx.ClosePath ();
ctx.SetColor (arrowColor_);
ctx.Fill ();
Size textSize = layout.GetSize ();
Size halfSize = new Size (textSize.Width/2, textSize.Height/2);
double quadrantSlideLength = halfSize.Width + halfSize.Height;
double quadrantD = normAngle / 90.0; // integer part gives quadrant.
int quadrant = (int)quadrantD; // quadrant in.
double prop = quadrantD - (double)quadrant; // proportion of way through this qadrant.
double dist = prop * quadrantSlideLength; // distance along quarter of bounds rectangle.
// now find the offset from the middle of the text box that the
// rear end of the arrow should end at (reverse this to get position
// of text box with respect to rear end of arrow).
//
// There is almost certainly an elgant way of doing this involving
// trig functions to get all the signs right, but I'm about ready to
// drop off to sleep at the moment, so this blatent method will have
// to do.
Point offsetFromMiddle = new Point (0, 0);
switch (quadrant) {
case 0:
if (dist > halfSize.Height) {
dist -= halfSize.Height;
offsetFromMiddle = new Point ( -halfSize.Width + dist, halfSize.Height );
}
else {
offsetFromMiddle = new Point ( -halfSize.Width, - dist );
}
break;
case 1:
if (dist > halfSize.Width) {
dist -= halfSize.Width;
offsetFromMiddle = new Point ( halfSize.Width, halfSize.Height - dist );
}
else {
offsetFromMiddle = new Point ( dist, halfSize.Height );
}
break;
case 2:
if (dist > halfSize.Height) {
dist -= halfSize.Height;
offsetFromMiddle = new Point ( halfSize.Width - dist, -halfSize.Height );
}
else {
offsetFromMiddle = new Point ( halfSize.Width, -dist );
}
break;
case 3:
if (dist > halfSize.Width) {
dist -= halfSize.Width;
offsetFromMiddle = new Point ( -halfSize.Width, -halfSize.Height + dist );
}
else {
offsetFromMiddle = new Point ( -dist, -halfSize.Height );
}
break;
default:
throw new XwPlotException( "Programmer error." );
}
ctx.SetColor (textColor_);
double x = fromPoint.X - halfSize.Width - offsetFromMiddle.X;
double y = fromPoint.Y - halfSize.Height + offsetFromMiddle.Y;
ctx.DrawTextLayout (layout, x, y);
ctx.Restore ();
}
public static void DrawRoundRectangle (Context cr, double x, double y, double r, double w, double h)
{
const double ARC_TO_BEZIER = 0.55228475;
double radius_x = r;
double radius_y = r / 4;
if (radius_x > w - radius_x)
radius_x = w / 2;
if (radius_y > h - radius_y)
radius_y = h / 2;
double c1 = ARC_TO_BEZIER * radius_x;
double c2 = ARC_TO_BEZIER * radius_y;
cr.NewPath ();
cr.MoveTo (x + radius_x, y);
cr.RelLineTo (w - 2 * radius_x, 0.0);
cr.RelCurveTo (c1, 0.0, radius_x, c2, radius_x, radius_y);
cr.RelLineTo (0, h - 2 * radius_y);
cr.RelCurveTo (0.0, c2, c1 - radius_x, radius_y, -radius_x, radius_y);
cr.RelLineTo (-w + 2 * radius_x, 0);
cr.RelCurveTo (-c1, 0, -radius_x, -c2, -radius_x, -radius_y);
cr.RelLineTo (0, -h + 2 * radius_y);
cr.RelCurveTo (0.0, -c2, radius_x - c1, -radius_y, radius_x, -radius_y);
cr.ClosePath ();
}
protected override void OnDraw(Xwt.Drawing.Context ctx)
{
base.OnDraw(ctx);
// Simple rectangles
ctx.SetLineWidth(1);
ctx.Rectangle(100, 5, 10, 10);
ctx.SetColor(Color.Black);
ctx.Fill();
ctx.Rectangle(115, 5, 10, 10);
ctx.SetColor(Color.Black);
ctx.Stroke();
//
ctx.SetLineWidth(3);
ctx.Rectangle(100, 20, 10, 10);
ctx.SetColor(Color.Black);
ctx.Fill();
ctx.Rectangle(115, 20, 10, 10);
ctx.SetColor(Color.Black);
ctx.Stroke();
// Rectangle with hole
ctx.Rectangle(10, 100, 40, 40);
ctx.MoveTo(45, 135);
ctx.RelLineTo(0, -20);
ctx.RelLineTo(-20, 0);
ctx.RelLineTo(0, 20);
ctx.ClosePath();
ctx.SetColor(Color.Black);
ctx.Fill();
// Dashed lines
ctx.SetLineDash(15, 10, 10, 5, 5);
ctx.Rectangle(100, 100, 100, 100);
ctx.Stroke();
ctx.SetLineDash(0);
ImageBuilder ib = new ImageBuilder(30, 30, ImageFormat.ARGB32);
ib.Context.Arc(15, 15, 15, 0, 360);
ib.Context.SetColor(new Color(1, 0, 1));
ib.Context.Rectangle(0, 0, 5, 5);
ib.Context.Fill();
var img = ib.ToImage();
ctx.DrawImage(img, 90, 90);
ctx.DrawImage(img, 90, 140, 50, 10);
ctx.Arc(190, 190, 15, 0, 360);
ctx.SetColor(new Color(1, 0, 1, 0.4));
ctx.Fill();
ctx.Save();
ctx.Translate(90, 220);
ctx.Pattern = new ImagePattern(img);
ctx.Rectangle(0, 0, 100, 70);
ctx.Fill();
ctx.Restore();
ctx.Translate(30, 30);
double end = 270;
for (double n = 0; n <= end; n += 5)
{
ctx.Save();
ctx.Rotate(n);
ctx.MoveTo(0, 0);
ctx.RelLineTo(30, 0);
double c = n / end;
ctx.SetColor(new Color(c, c, c));
ctx.Stroke();
ctx.Restore();
}
ctx.ResetTransform();
}
protected override void OnDraw(Context ctx, Rectangle dirtyRect)
{
base.OnDraw(ctx, dirtyRect);
if (image != null) {
if (Heighlighted && IsThumbnail) {
ctx.RoundRectangle(new Rectangle(Point.Zero, image.Size), 3);
ctx.SetColor(Colors.LightSteelBlue);
ctx.Fill();
}
ctx.DrawImage(image, (new Rectangle(Point.Zero, image.Size)).Inflate(-3, -3));
if (mask != null && ShowMask) {
ctx.DrawImage(MaskBitmap, (new Rectangle(Point.Zero, image.Size)).Inflate(-3, -3), 0.6);
}
}
if (isEditMode) {
Point scaleFactor = new Point(
scan.Size.Width / image.Size.Width,
scan.Size.Height / image.Size.Height);
ctx.SetColor(Mask.maskColor);
foreach (MaskEntry p in scan.Mask.MaskPositions) {
switch (p.type) {
case MaskEntryType.Point:
ctx.SetLineWidth(p.pointerSize / scaleFactor.Y * 2);
ctx.LineTo(p.position.X / scaleFactor.X, p.position.Y / scaleFactor.Y);
ctx.Stroke();
ctx.Arc(
p.position.X / scaleFactor.X, p.position.Y / scaleFactor.Y,
p.pointerSize / scaleFactor.Y, 0, 360);
ctx.Fill();
ctx.MoveTo(p.position.X / scaleFactor.X, p.position.Y / scaleFactor.Y);
break;
case MaskEntryType.Space:
ctx.Stroke();
ctx.ClosePath();
break;
case MaskEntryType.Delete:
ctx.Arc(
p.position.X / scaleFactor.X, p.position.Y / scaleFactor.Y,
p.pointerSize / scaleFactor.Y, 0, 360);
ctx.Save();
ctx.Clip();
int newX = (int) Math.Min(Math.Max(
p.position.X / scaleFactor.X - pointerSize / scaleFactor.Y, 0), scan.Size.Width);
int newY = (int) Math.Min(Math.Max(
p.position.Y / scaleFactor.Y - pointerSize / scaleFactor.Y, 0), scan.Size.Height);
using (ImageBuilder ib =
new ImageBuilder((pointerSize / scaleFactor.Y * 2), (pointerSize / scaleFactor.Y * 2))) {
BitmapImage bi = ib.ToBitmap();
image.WithBoxSize(image.Size).ToBitmap().CopyArea(
newX, newY,
(int) (pointerSize / scaleFactor.Y * 2), (int) (pointerSize / scaleFactor.Y * 2),
bi, 0, 0);
ctx.DrawImage(bi, new Point(newX, newY));
}
ctx.Restore();
ctx.ClosePath();
break;
}
}
ctx.Stroke();
if (mousePosition != Point.Zero) {
ctx.Arc(mousePosition.X, mousePosition.Y, pointerSize / Math.Max(scaleFactor.X, scaleFactor.Y), 0, 360);
ctx.Fill();
if (mousePositionStart != Point.Zero) {
ctx.SetLineWidth((pointerSize / Math.Max(scaleFactor.X, scaleFactor.Y)) * 2);
ctx.SetColor(Mask.maskColor);
ctx.Arc(mousePositionStart.X, mousePositionStart.Y, pointerSize / Math.Max(scaleFactor.X, scaleFactor.Y), 0, 360);
ctx.Fill();
ctx.MoveTo(mousePosition);
ctx.LineTo(mousePositionStart);
ctx.Stroke();
}
}
}
}
void DrawCursor (Context ctx, ChartCursor cursor)
{
ctx.SetColor (cursor.Color);
double x, y;
GetPoint (cursor.Value, cursor.Value, out x, out y);
if (cursor.Dimension == AxisDimension.X) {
double cy = top - AreaBorderWidth - 1;
ctx.MoveTo (x, cy);
ctx.LineTo (x + (cursor.HandleSize/2), cy - cursor.HandleSize + 1);
ctx.LineTo (x - (cursor.HandleSize/2), cy - cursor.HandleSize + 1);
ctx.ClosePath ();
if (activeCursor == cursor)
ctx.FillPreserve ();
ctx.Stroke ();
ctx.MoveTo (x, top);
ctx.RelLineTo (0, height);
ctx.Stroke ();
} else {
throw new NotSupportedException ();
}
}
/// <summary>
/// Draws the marker at the given position
/// </summary>
/// <param name="ctx">The Drawing Context with which to draw.</param>
/// <param name="x">The [physical] x position to draw the marker.</param>
/// <param name="y">The [physical] y position to draw the marker.</param>
public void Draw(Context ctx, double x, double y )
{
ctx.Save ();
ctx.SetLineWidth (lineWidth);
ctx.SetColor (lineColor);
switch (markerType) {
case MarkerType.Cross1:
ctx.MoveTo (x-h, y+h);
ctx.LineTo (x+h, y-h);
ctx.MoveTo (x+h, y+h);
ctx.LineTo (x-h, y-h);
ctx.Stroke ();
break;
case MarkerType.Cross2:
ctx.MoveTo (x, y-h);
ctx.LineTo (x, y+h);
ctx.MoveTo (x-h, y);
ctx.LineTo (x+h, y);
ctx.Stroke ();
break;
case MarkerType.Circle:
ctx.MoveTo (x+h,y);
ctx.Arc (x, y, h, 0, 360);
ctx.ClosePath ();
if (filled ) {
ctx.SetColor (fillColor);
ctx.FillPreserve ();
}
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.Square:
ctx.Rectangle (x-h, y-h, size, size);
ctx.ClosePath ();
if (filled) {
ctx.SetColor (fillColor);
ctx.FillPreserve ();
}
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.Triangle:
ctx.MoveTo (x-h, y+h);
ctx.LineTo (x, y-h);
ctx.LineTo (x+h, y+h);
ctx.ClosePath ();
if (filled) {
ctx.SetColor (fillColor);
ctx.FillPreserve ();
}
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.TriangleDown:
ctx.MoveTo (x-h, y-h);
ctx.LineTo (x, y+h);
ctx.LineTo (x+h, y-h);
ctx.ClosePath ();
if (filled) {
ctx.SetColor (fillColor);
ctx.FillPreserve ();
}
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.FilledCircle:
ctx.MoveTo (x+h,y);
ctx.Arc (x, y, h, 0, 360);
ctx.ClosePath ();
ctx.SetColor (fillColor);
ctx.FillPreserve ();
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.FilledSquare:
ctx.Rectangle (x-h, y-h, size, size);
ctx.ClosePath ();
ctx.SetColor (fillColor);
ctx.FillPreserve ();
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.FilledTriangle:
ctx.MoveTo (x-h, y+h);
ctx.LineTo (x, y-h);
ctx.LineTo (x+h, y+h);
ctx.ClosePath ();
ctx.SetColor (fillColor);
ctx.FillPreserve ();
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.Diamond:
ctx.MoveTo (x-h, y);
ctx.LineTo (x, y-h);
ctx.LineTo (x+h, y);
ctx.LineTo (x, y+h);
ctx.ClosePath ();
if (filled) {
ctx.SetColor (fillColor);
ctx.FillPreserve ();
}
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.Flag:
ctx.MoveTo (x, y-size);
ctx.LineTo (x+size, y-size+size/3);
ctx.LineTo (x, y-size+2*size/3);
ctx.ClosePath ();
ctx.MoveTo (x, y);
ctx.LineTo (x, y-size);
if (filled) {
ctx.SetColor (fillColor);
ctx.FillPreserve ();
}
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.FlagDown:
ctx.MoveTo (x, y+size);
ctx.LineTo (x+size, y+size-size/3);
ctx.LineTo (x, y+size-2*size/3);
ctx.ClosePath ();
ctx.MoveTo (x, y);
ctx.LineTo (x, y+size);
if (filled) {
ctx.SetColor (fillColor);
ctx.FillPreserve ();
}
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.FilledFlag:
ctx.MoveTo (x, y-size);
ctx.LineTo (x+size, y-size+size/3);
ctx.LineTo (x, y-size+2*size/3);
ctx.ClosePath ();
ctx.MoveTo (x, y);
ctx.LineTo (x, y-size);
ctx.SetColor (fillColor);
ctx.FillPreserve ();
ctx.SetColor (lineColor);
ctx.Stroke ();
break;
case MarkerType.None:
break;
}
ctx.Restore ();
}
public static void DrawRoundRectangle(Xwt.Drawing.Context cr, bool topLeftRound, bool topRightRound, bool bottomLeftRound, bool bottomRightRound, double x, double y, double r, double w, double h)
{
// UA****BQ
// H C
// * *
// G D
// TF****ES
cr.NewPath();
if (topLeftRound)
{
cr.MoveTo(x + r, y); // Move to A
}
else
{
cr.MoveTo(x, y); // Move to U
}
if (topRightRound)
{
cr.LineTo(x + w - r, y); // Straight line to B
cr.CurveTo(x + w, y,
x + w, y,
x + w, y + r); // Curve to C, Control points are both at Q
}
else
{
cr.LineTo(x + w, y); // Straight line to Q
}
if (bottomRightRound)
{
cr.LineTo(x + w, y + h - r); // Move to D
cr.CurveTo(x + w, y + h,
x + w, y + h,
x + w - r, y + h); // Curve to E
}
else
{
cr.LineTo(x + w, y + h); // Move to S
}
if (bottomLeftRound)
{
cr.LineTo(x + r, y + h); // Line to F
cr.CurveTo(x, y + h,
x, y + h,
x, y + h - r); // Curve to G
}
else
{
cr.LineTo(x, y + h); // Line to T
}
if (topLeftRound)
{
cr.LineTo(x, y + r); // Line to H
cr.CurveTo(x, y,
x, y,
x + r, y); // Curve to A
}
else
{
cr.LineTo(x, y); // Line to U
}
cr.ClosePath();
}
/// <summary>
/// Draw the filled region
/// </summary>
/// <param name="g">The Drawing Context with which to draw.</param>
/// <param name="xAxis">The X-Axis to draw against.</param>
/// <param name="yAxis">The Y-Axis to draw against.</param>
public void Draw(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
ITransform2D t = Transform2D.GetTransformer (xAxis, yAxis);
ctx.Save ();
if (hl1 != null && hl2 != null) {
ctx.MoveTo (t.Transform (xAxis.Axis.WorldMin, hl1.OrdinateValue));
ctx.LineTo (t.Transform (xAxis.Axis.WorldMax, hl1.OrdinateValue));
ctx.LineTo (t.Transform (xAxis.Axis.WorldMax, hl2.OrdinateValue));
ctx.LineTo (t.Transform (xAxis.Axis.WorldMin, hl2.OrdinateValue));
ctx.ClosePath ();
} else if (vl1 != null && vl2 != null) {
ctx.MoveTo (t.Transform (vl1.AbscissaValue, yAxis.Axis.WorldMin));
ctx.LineTo (t.Transform (vl1.AbscissaValue, yAxis.Axis.WorldMax));
ctx.LineTo (t.Transform (vl2.AbscissaValue, yAxis.Axis.WorldMax));
ctx.LineTo (t.Transform (vl2.AbscissaValue, yAxis.Axis.WorldMin));
ctx.ClosePath ();
} else if (lp1 != null && lp2 != null) {
SequenceAdapter a1 = new SequenceAdapter (lp1.DataSource, lp1.DataMember, lp1.OrdinateData, lp1.AbscissaData);
SequenceAdapter a2 = new SequenceAdapter (lp2.DataSource, lp2.DataMember, lp2.OrdinateData, lp2.AbscissaData);
// Start at first point of LinePlot 1 within plot bounds
int start = 0;
while (t.Transform (a1 [start]).X < xAxis.PhysicalMin.X) {
++start;
}
Point first = t.Transform (a1 [start]);
ctx.MoveTo (first);
// Join LinePlot 1 points in ascending order
Point next;
for (int i = start+1; i < a1.Count-1; ++i) {
next = t.Transform (a1 [i]);
if (next.X > xAxis.PhysicalMax.X)
break;
ctx.LineTo (next);
}
// Then join LinePlot 2 points in descending order
int end = a2.Count-1;
while (t.Transform (a2 [end]).X > xAxis.PhysicalMax.X) {
--end;
}
for (int i = end; i > 0; --i) {
next = t.Transform (a2 [i]);
if (next.X < xAxis.PhysicalMin.X)
break;
ctx.LineTo (next);
}
ctx.LineTo (first);
ctx.ClosePath ();
}
else {
throw new XwPlotException ("Filled Region bounds not defined");
}
ctx.SetColor (FillColor);
ctx.Fill ();
ctx.Restore ();
}
void DrawPopover(Context ctx)
{
lock (trackerLock)
{
if (actualTrackerHitResult != null)
{
var trackerSettings = DefaultTrackerSettings;
if (actualTrackerHitResult.Series != null && !string.IsNullOrEmpty(actualTrackerHitResult.Series.TrackerKey))
trackerSettings = trackerDefinitions[actualTrackerHitResult.Series.TrackerKey];
if (trackerSettings.Enabled)
{
var extents = actualTrackerHitResult.LineExtents;
if (Math.Abs(extents.Width) < double.Epsilon)
{
extents = new OxyRect(actualTrackerHitResult.XAxis.ScreenMin.X, extents.Top, actualTrackerHitResult.XAxis.ScreenMax.X - actualTrackerHitResult.XAxis.ScreenMin.X, extents.Height);
}
if (Math.Abs(extents.Height) < double.Epsilon)
{
extents = new OxyRect(extents.Left, actualTrackerHitResult.YAxis.ScreenMin.Y, extents.Width, actualTrackerHitResult.YAxis.ScreenMax.Y - actualTrackerHitResult.YAxis.ScreenMin.Y);
}
var pos = actualTrackerHitResult.Position;
if (trackerSettings.HorizontalLineVisible)
{
renderContext.DrawLine(
new[] { new ScreenPoint(extents.Left, pos.Y), new ScreenPoint(extents.Right, pos.Y) },
trackerSettings.HorizontalLineColor,
trackerSettings.HorizontalLineWidth,
trackerSettings.HorizontalLineActualDashArray,
LineJoin.Miter,
true);
}
if (trackerSettings.VerticalLineVisible)
{
renderContext.DrawLine(
new[] { new ScreenPoint(pos.X, extents.Top), new ScreenPoint(pos.X, extents.Bottom) },
trackerSettings.VerticalLineColor,
trackerSettings.VerticalLineWidth,
trackerSettings.VerticalLineActualDashArray,
LineJoin.Miter,
true);
}
TextLayout text = new TextLayout();
text.Font = trackerSettings.Font;
text.Text = actualTrackerHitResult.Text;
var arrowTop = actualTrackerHitResult.Position.Y <= Bounds.Height / 2;
const int arrowPadding = 10;
var textSize = text.GetSize();
var outerSize = new Size(textSize.Width + (trackerSettings.Padding * 2),
textSize.Height + (trackerSettings.Padding * 2) + arrowPadding);
var trackerBounds = new Rectangle(pos.X - (outerSize.Width / 2),
0,
outerSize.Width,
outerSize.Height - arrowPadding);
if (arrowTop)
trackerBounds.Y = pos.Y + arrowPadding + trackerSettings.BorderWidth;
else
trackerBounds.Y = pos.Y - outerSize.Height - trackerSettings.BorderWidth;
var borderColor = trackerSettings.BorderColor.ToXwtColor();
ctx.RoundRectangle(trackerBounds, 6);
ctx.SetLineWidth(trackerSettings.BorderWidth);
ctx.SetColor(borderColor);
ctx.StrokePreserve();
ctx.SetColor(trackerSettings.Background.ToXwtColor());
ctx.Fill();
ctx.Save();
var arrowX = trackerBounds.Center.X;
var arrowY = arrowTop ? trackerBounds.Top : trackerBounds.Bottom;
ctx.NewPath();
ctx.MoveTo(arrowX, arrowY);
var triangleSide = 2 * arrowPadding / Math.Sqrt(3);
var halfSide = triangleSide / 2;
var verticalModifier = arrowTop ? -1 : 1;
ctx.RelMoveTo(-halfSide, 0);
ctx.RelLineTo(halfSide, verticalModifier * arrowPadding);
ctx.RelLineTo(halfSide, verticalModifier * -arrowPadding);
ctx.SetColor(borderColor);
ctx.StrokePreserve();
ctx.ClosePath();
ctx.SetColor(trackerSettings.Background.ToXwtColor());
ctx.Fill();
ctx.Restore();
ctx.SetColor(trackerSettings.TextColor.ToXwtColor());
ctx.DrawTextLayout(text,
trackerBounds.Left + trackerSettings.Padding,
trackerBounds.Top + trackerSettings.Padding);
}
}
}
}