/// <summary>
/// Draws the line plot using the Context and Physical Axes provided
/// </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>
/// <param name="drawShadow">If true draw the shadow for the line. If false, draw line.</param>
public void DrawLineOrShadow(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis, bool drawShadow)
{
SequenceAdapter data = new SequenceAdapter (DataSource, DataMember, OrdinateData, AbscissaData);
ITransform2D t = Transform2D.GetTransformer (xAxis, yAxis);
int numberPoints = data.Count;
if (data.Count == 0) {
return;
}
ctx.Save ();
ctx.SetLineWidth (lineWidth);
if (lineDash != null) {
ctx.SetLineDash (0, lineDash);
}
if (numberPoints == 1) {
Point physical = t.Transform (data[0]);
if (drawShadow) {
ctx.SetColor (shadowColor);
ctx.MoveTo (physical.X - 0.5 + ShadowOffset.X, physical.Y + ShadowOffset.Y);
ctx.LineTo (physical.X + 0.5 + ShadowOffset.X, physical.Y + ShadowOffset.Y);
ctx.Stroke ();
}
else {
ctx.SetColor (lineColor);
ctx.MoveTo (physical.X-0.5, physical.Y);
ctx.LineTo (physical.X+0.5, physical.Y);
ctx.Stroke ();
}
}
else {
// prepare for clipping
double leftCutoff = xAxis.PhysicalToWorld (xAxis.PhysicalMin, false);
double rightCutoff = xAxis.PhysicalToWorld (xAxis.PhysicalMax, false);
if (leftCutoff > rightCutoff) {
Utils.Swap (ref leftCutoff, ref rightCutoff);
}
if (drawShadow) {
// correct cut-offs
double shadowCorrection =
xAxis.PhysicalToWorld (ShadowOffset, false) - xAxis.PhysicalToWorld (new Point(0,0), false);
leftCutoff -= shadowCorrection;
rightCutoff -= shadowCorrection;
}
for (int i = 1; i < numberPoints; ++i) {
// check to see if any values null. If so, then continue.
double dx1 = data[i-1].X;
double dx2 = data[i].X;
double dy1 = data[i-1].Y;
double dy2 = data[i].Y;
if (Double.IsNaN(dx1) || Double.IsNaN(dy1) || Double.IsNaN(dx2) || Double.IsNaN(dy2)) {
continue;
}
// do horizontal clipping here, to speed up
if ((dx1 < leftCutoff && dx2 < leftCutoff) || (rightCutoff < dx1 && rightCutoff < dx2)) {
continue;
}
// else draw line.
Point p1 = t.Transform (data[i-1]);
Point p2 = t.Transform (data[i]);
// when very far zoomed in, points can fall ontop of each other,
// and g.DrawLine throws an overflow exception
if (p1.Equals(p2)) {
continue;
}
if (drawShadow) {
ctx.SetColor (shadowColor);
ctx.MoveTo (p1.X + ShadowOffset.X, p1.Y + ShadowOffset.Y);
ctx.LineTo (p2.X + ShadowOffset.X, p2.Y + ShadowOffset.Y);
ctx.Stroke ();
}
else {
ctx.SetColor (lineColor);
ctx.MoveTo (p1.X, p1.Y);
ctx.LineTo (p2.X, p2.Y);
ctx.Stroke ();
}
}
}
ctx.Restore ();
}
/// <summary>
/// Draws the line plot using the Context and Physical Axes provided
/// </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>
/// <param name="drawShadow">If true draw the shadow for the line. If false, draw line.</param>
public void DrawLineOrShadow(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis, bool drawShadow)
{
SequenceAdapter data = new SequenceAdapter(DataSource, DataMember, OrdinateData, AbscissaData);
ITransform2D t = Transform2D.GetTransformer(xAxis, yAxis);
int numberPoints = data.Count;
if (data.Count == 0)
{
return;
}
ctx.Save();
ctx.SetLineWidth(lineWidth);
if (lineDash != null)
{
ctx.SetLineDash(0, lineDash);
}
if (numberPoints == 1)
{
Point physical = t.Transform(data[0]);
if (drawShadow)
{
ctx.SetColor(shadowColor);
ctx.MoveTo(physical.X - 0.5 + ShadowOffset.X, physical.Y + ShadowOffset.Y);
ctx.LineTo(physical.X + 0.5 + ShadowOffset.X, physical.Y + ShadowOffset.Y);
ctx.Stroke();
}
else
{
ctx.SetColor(lineColor);
ctx.MoveTo(physical.X - 0.5, physical.Y);
ctx.LineTo(physical.X + 0.5, physical.Y);
ctx.Stroke();
}
}
else
{
// prepare for clipping
double leftCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMin, false);
double rightCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMax, false);
if (leftCutoff > rightCutoff)
{
Utils.Swap(ref leftCutoff, ref rightCutoff);
}
if (drawShadow)
{
// correct cut-offs
double shadowCorrection =
xAxis.PhysicalToWorld(ShadowOffset, false) - xAxis.PhysicalToWorld(new Point(0, 0), false);
leftCutoff -= shadowCorrection;
rightCutoff -= shadowCorrection;
}
for (int i = 1; i < numberPoints; ++i)
{
// check to see if any values null. If so, then continue.
double dx1 = data[i - 1].X;
double dx2 = data[i].X;
double dy1 = data[i - 1].Y;
double dy2 = data[i].Y;
if (Double.IsNaN(dx1) || Double.IsNaN(dy1) || Double.IsNaN(dx2) || Double.IsNaN(dy2))
{
continue;
}
// do horizontal clipping here, to speed up
if ((dx1 < leftCutoff && dx2 < leftCutoff) || (rightCutoff < dx1 && rightCutoff < dx2))
{
continue;
}
// else draw line.
Point p1 = t.Transform(data[i - 1]);
Point p2 = t.Transform(data[i]);
// when very far zoomed in, points can fall ontop of each other,
// and g.DrawLine throws an overflow exception
if (p1.Equals(p2))
{
continue;
}
if (drawShadow)
{
ctx.SetColor(shadowColor);
ctx.MoveTo(p1.X + ShadowOffset.X, p1.Y + ShadowOffset.Y);
ctx.LineTo(p2.X + ShadowOffset.X, p2.Y + ShadowOffset.Y);
ctx.Stroke();
}
else
{
ctx.SetColor(lineColor);
ctx.MoveTo(p1.X, p1.Y);
ctx.LineTo(p2.X, p2.Y);
ctx.Stroke();
}
}
}
ctx.Restore();
}
/// <summary>
/// Draws the step plot using a Drawing Context against the provided x and y axes.
/// </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 virtual void Draw(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter data =
new SequenceAdapter(DataSource, DataMember, OrdinateData, AbscissaData);
double leftCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMin, false);
double rightCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMax, false);
ctx.Save();
ctx.SetColor(Color);
ctx.SetLineWidth(1);
for (int i = 0; i < data.Count; ++i)
{
Point p1 = data[i];
if (Double.IsNaN(p1.X) || Double.IsNaN(p1.Y))
{
continue;
}
Point p2;
Point p3;
if (i + 1 != data.Count)
{
p2 = data[i + 1];
if (Double.IsNaN(p2.X) || Double.IsNaN(p2.Y))
{
continue;
}
p2.Y = p1.Y;
p3 = data[i + 1];
}
else
{
// Check that we are not dealing with a DataSource of 1 point.
// This check is done here so it is only checked on the end
// condition and not for every point in the DataSource.
if (data.Count > 1)
{
p2 = data[i - 1];
}
else
{
p2 = p1;
}
double offset = p1.X - p2.X;
p2.X = p1.X + offset;
p2.Y = p1.Y;
p3 = p2;
}
if (centre)
{
double offset = (p2.X - p1.X) / 2.0;
p1.X -= offset;
p2.X -= offset;
p3.X -= offset;
}
Point xPos1 = xAxis.WorldToPhysical(p1.X, false);
Point yPos1 = yAxis.WorldToPhysical(p1.Y, false);
Point xPos2 = xAxis.WorldToPhysical(p2.X, false);
Point yPos2 = yAxis.WorldToPhysical(p2.Y, false);
Point xPos3 = xAxis.WorldToPhysical(p3.X, false);
Point yPos3 = yAxis.WorldToPhysical(p3.Y, false);
// do horizontal clipping here, to speed up
if ((p1.X < leftCutoff && p2.X < leftCutoff && p3.X < leftCutoff) || (p1.X > rightCutoff && p2.X > rightCutoff && p3.X > rightCutoff))
{
continue;
}
if (!this.hideHorizontalSegments)
{
if (scale != 1)
{
double middle = (xPos2.X + xPos1.X) / 2;
double width = xPos2.X - xPos1.X;
width *= this.scale;
ctx.MoveTo(middle - width / 2, yPos1.Y);
ctx.LineTo(middle + width / 2, yPos2.Y);
}
else
{
ctx.MoveTo(xPos1.X, yPos1.Y);
ctx.LineTo(xPos2.X, yPos2.Y);
}
ctx.Stroke();
}
if (!this.hideVerticalSegments)
{
ctx.MoveTo(xPos2.X, yPos2.Y);
ctx.LineTo(xPos3.X, yPos3.Y);
ctx.Stroke();
}
}
ctx.Restore();
}
/// <summary>
/// Draws the step plot using a Drawing Context against the provided x and y axes.
/// </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 virtual void Draw(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis )
{
SequenceAdapter data =
new SequenceAdapter (DataSource, DataMember, OrdinateData, AbscissaData);
double leftCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMin, false);
double rightCutoff = xAxis.PhysicalToWorld(xAxis.PhysicalMax, false);
ctx.Save ();
ctx.SetColor (Color);
ctx.SetLineWidth (1);
for (int i=0; i<data.Count; ++i) {
Point p1 = data[i];
if (Double.IsNaN(p1.X) || Double.IsNaN(p1.Y)) {
continue;
}
Point p2;
Point p3;
if (i+1 != data.Count) {
p2 = data[i+1];
if (Double.IsNaN(p2.X) || Double.IsNaN(p2.Y)) {
continue;
}
p2.Y = p1.Y;
p3 = data[i+1];
}
else {
// Check that we are not dealing with a DataSource of 1 point.
// This check is done here so it is only checked on the end
// condition and not for every point in the DataSource.
if (data.Count > 1) {
p2 = data[i - 1];
}
else {
p2 = p1;
}
double offset = p1.X - p2.X;
p2.X = p1.X + offset;
p2.Y = p1.Y;
p3 = p2;
}
if (centre) {
double offset = ( p2.X - p1.X ) / 2.0;
p1.X -= offset;
p2.X -= offset;
p3.X -= offset;
}
Point xPos1 = xAxis.WorldToPhysical (p1.X, false);
Point yPos1 = yAxis.WorldToPhysical (p1.Y, false);
Point xPos2 = xAxis.WorldToPhysical (p2.X, false);
Point yPos2 = yAxis.WorldToPhysical (p2.Y, false);
Point xPos3 = xAxis.WorldToPhysical (p3.X, false);
Point yPos3 = yAxis.WorldToPhysical (p3.Y, false);
// do horizontal clipping here, to speed up
if ((p1.X<leftCutoff && p2.X<leftCutoff && p3.X<leftCutoff) || (p1.X>rightCutoff && p2.X>rightCutoff && p3.X>rightCutoff)) {
continue;
}
if (!this.hideHorizontalSegments) {
if (scale != 1) {
double middle = (xPos2.X + xPos1.X) / 2;
double width = xPos2.X - xPos1.X;
width *= this.scale;
ctx.MoveTo (middle-width/2, yPos1.Y);
ctx.LineTo (middle+width/2, yPos2.Y);
}
else {
ctx.MoveTo (xPos1.X, yPos1.Y);
ctx.LineTo (xPos2.X, yPos2.Y);
}
ctx.Stroke ();
}
if (!this.hideVerticalSegments) {
ctx.MoveTo (xPos2.X, yPos2.Y);
ctx.LineTo (xPos3.X, yPos3.Y);
ctx.Stroke ();
}
}
ctx.Restore ();
}
