/// <summary>
/// Draws a scope cursor.
/// </summary>
private void DrawCursor(RectangleRange rectangleRange, ScopeCursor cursor)
{
using (CreateContextState())
{
ClipToRange(rectangleRange);
DrawCursorLinesAndMarkers(rectangleRange, cursor);
foreach (var tick in cursor.XTicks ?? new ScopeCursorValueTick[0])
{
var tickPosition = new PointD(tick.Value, cursor.Position.Y);
DrawCursorTickLines(rectangleRange, tick, tickPosition, ScopeCursorLines.X, cursor.Color);
DrawCaptions(rectangleRange, tick.Captions, tickPosition);
}
foreach (var tick in cursor.YTicks ?? new ScopeCursorValueTick[0])
{
var tickPosition = new PointD(cursor.Position.X, tick.Value);
DrawCursorTickLines(rectangleRange, tick, tickPosition, ScopeCursorLines.Y, cursor.Color);
DrawCaptions(rectangleRange, tick.Captions, tickPosition);
}
DrawCaptions(rectangleRange, cursor.Captions, cursor.Position.CairoPoint);
}
}
/// <summary>
/// Initializes an instance of this class.
/// </summary>
/// <param name="cursor">The cursor this object belongs to.</param>
/// <param name="selectedLines">A value indicating which lines are selected.</param>
public ScopeCursorSelection(ScopeCursor cursor, ScopeCursorLines selectedLines)
{
Cursor = cursor;
SelectedLines = selectedLines;
}
/// <summary>
/// Draws the lines and markers of a scope cursor.
/// </summary>
private void DrawCursorLinesAndMarkers(RectangleRange rectangleRange, ScopeCursor cursor)
{
var userToDeviceMatrix = rectangleRange.Matrix;
var position = cursor.Position;
var lines = cursor.Lines;
var markers = cursor.Markers;
var color = cursor.Color;
using (CreateContextState())
{
Context.SetSourceColor(color);
using (CreateContextState(userToDeviceMatrix))
{
if ((lines & ScopeCursorLines.X) != ScopeCursorLines.None)
{
AddLinePath(new PointD(position.X, rectangleRange.MinY), new PointD(position.X, rectangleRange.MaxY));
}
}
Context.LineWidth = (cursor.HighlightedLines & ScopeCursorLines.X) != ScopeCursorLines.None
? _cursorHighlightLineWidth : _cursorLineWidth;
Context.SetDash(
cursor.LineWeight == ScopeCursorLineWeight.Low ? _cursorLineLowWeightDashes
: cursor.LineWeight == ScopeCursorLineWeight.Medium ? _cursorLineMediumWeightDashes
: new double[0],
0);
Context.Stroke();
using (CreateContextState(userToDeviceMatrix))
{
if ((lines & ScopeCursorLines.Y) != ScopeCursorLines.None)
{
AddLinePath(new PointD(rectangleRange.MinX, position.Y), new PointD(rectangleRange.MaxX, position.Y));
}
}
Context.LineWidth = (cursor.HighlightedLines & ScopeCursorLines.Y) != ScopeCursorLines.None
? _cursorHighlightLineWidth : _cursorLineWidth;
Context.Stroke();
if ((markers & ScopeCursorMarkers.XLeft) != ScopeCursorMarkers.None)
{
AddXCursorMarkerPairPathFromCurrentPosition(
userToDeviceMatrix.TransformPoint(position.X, rectangleRange.MaxY),
userToDeviceMatrix.TransformPoint(position.X, rectangleRange.MinY),
ScopeHorizontalAlignment.Right);
}
if ((markers & ScopeCursorMarkers.XRight) != ScopeCursorMarkers.None)
{
AddXCursorMarkerPairPathFromCurrentPosition(
userToDeviceMatrix.TransformPoint(position.X, rectangleRange.MaxY),
userToDeviceMatrix.TransformPoint(position.X, rectangleRange.MinY),
ScopeHorizontalAlignment.Left);
}
if ((markers & ScopeCursorMarkers.YUpper) != ScopeCursorMarkers.None)
{
AddYCursorMarkerPairPathFromCurrentPosition(
userToDeviceMatrix.TransformPoint(rectangleRange.MinX, position.Y),
userToDeviceMatrix.TransformPoint(rectangleRange.MaxX, position.Y),
ScopeVerticalAlignment.Bottom);
}
if ((markers & ScopeCursorMarkers.YLower) != ScopeCursorMarkers.None)
{
AddYCursorMarkerPairPathFromCurrentPosition(
userToDeviceMatrix.TransformPoint(rectangleRange.MinX, position.Y),
userToDeviceMatrix.TransformPoint(rectangleRange.MaxX, position.Y),
ScopeVerticalAlignment.Top);
}
Context.LineWidth = _cursorMarkersLineWidth;
Context.FillPreserve();
Context.Stroke();
}
}
