/// <summary>
/// Get <see cref="XLine"/> maximum length for <see cref="LineFixedLengthFlags.All"/> mode.
/// </summary>
/// <param name="line">The line shape.</param>
/// <param name="x1">The calculated X coordinate for <see cref="XLine.Start"/> point.</param>
/// <param name="y1">The calculated Y coordinate for <see cref="XLine.Start"/> point.</param>
/// <param name="x2">The calculated X coordinate for <see cref="XLine.End"/> point.</param>
/// <param name="y2">The calculated Y coordinate for <see cref="XLine.End"/> point.</param>
public static void GetMaxLengthAll(this XLine line, ref double x1, ref double y1, ref double x2, ref double y2)
{
var ls = line.Style.LineStyle;
bool shortenStart = ls.FixedLength.StartTrigger.Flags != ShapeStateFlags.Default &&
line.Start.State.Flags.HasFlag(ls.FixedLength.StartTrigger.Flags) &&
ls.FixedLength.Flags.HasFlag(LineFixedLengthFlags.Start);
bool shortenEnd = ls.FixedLength.EndTrigger.Flags != ShapeStateFlags.Default &&
line.End.State.Flags.HasFlag(ls.FixedLength.EndTrigger.Flags) &&
ls.FixedLength.Flags.HasFlag(LineFixedLengthFlags.End);
if (shortenStart && !shortenEnd)
{
double dx = x1 - x2;
double dy = y1 - y2;
double distance = Sqrt(dx * dx + dy * dy);
x1 = x2 - (x2 - x1) / distance * ls.FixedLength.Length;
y1 = y2 - (y2 - y1) / distance * ls.FixedLength.Length;
}
if (!shortenStart && shortenEnd)
{
double dx = x2 - x1;
double dy = y2 - y1;
double distance = Sqrt(dx * dx + dy * dy);
x2 = x1 - (x1 - x2) / distance * ls.FixedLength.Length;
y2 = y1 - (y1 - y2) / distance * ls.FixedLength.Length;
}
}
/// <summary>
/// Get <see cref="XLine"/> maximum length using <see cref="LineFixedLengthFlags"/>.
/// </summary>
/// <param name="line">The line shape.</param>
/// <param name="x1">The calculated X coordinate for <see cref="XLine.Start"/> point.</param>
/// <param name="y1">The calculated Y coordinate for <see cref="XLine.Start"/> point.</param>
/// <param name="x2">The calculated X coordinate for <see cref="XLine.End"/> point.</param>
/// <param name="y2">The calculated Y coordinate for <see cref="XLine.End"/> point.</param>
public static void GetMaxLength(this XLine line, ref double x1, ref double y1, ref double x2, ref double y2)
{
var ls = line.Style.LineStyle;
if (ls.FixedLength.Flags == LineFixedLengthFlags.Disabled)
{
return;
}
if (ls.FixedLength.Flags.HasFlag(LineFixedLengthFlags.All))
{
GetMaxLengthAll(line, ref x1, ref y1, ref x2, ref y2);
}
else
{
if (ls.FixedLength.Flags.HasFlag(LineFixedLengthFlags.Vertical))
{
bool isVertical = Round(x1, 1) == Round(x2, 1);
if (isVertical)
{
GetMaxLengthVertical(line, ref y1, ref y2);
}
}
if (ls.FixedLength.Flags.HasFlag(LineFixedLengthFlags.Horizontal))
{
bool isHorizontal = Round(y1, 1) == Round(y2, 1);
if (isHorizontal)
{
GetMaxLengthHorizontal(line, ref x1, ref x2);
}
}
}
}
/// <summary>
/// Transfer selection state to <see cref="ToolState.Two"/>.
/// </summary>
public void ToStateTwo()
{
_line12 = XLine.Create(0, 0, _style, null);
_helperPoint2 = XPoint.Create(0, 0, _point);
_layer.Shapes = _layer.Shapes.Add(_line12);
_layer.Shapes = _layer.Shapes.Add(_helperPoint2);
}
/// <summary>
/// Transfer selection state to <see cref="ToolState.Three"/>.
/// </summary>
public void ToStateThree()
{
_line43 = XLine.Create(0, 0, _style, null);
_line23 = XLine.Create(0, 0, _style, null);
_helperPoint3 = XPoint.Create(0, 0, _point);
_layer.Shapes = _layer.Shapes.Add(_line43);
_layer.Shapes = _layer.Shapes.Add(_line23);
_layer.Shapes = _layer.Shapes.Add(_helperPoint3);
}
/// <summary>
///
/// </summary>
/// <param name="line"></param>
/// <param name="rect"></param>
/// <param name="selected"></param>
/// <param name="threshold"></param>
/// <param name="dx"></param>
/// <param name="dy"></param>
/// <returns></returns>
public static bool HitTestLine(XLine line, Rect2 rect, ISet<BaseShape> selected, double threshold, double dx, double dy)
{
if (ShapeBounds.GetPointBounds(line.Start, threshold, dx, dy).IntersectsWith(rect)
|| ShapeBounds.GetPointBounds(line.End, threshold, dx, dy).IntersectsWith(rect)
|| MathHelpers.LineIntersectsWithRect(rect, new Point2(line.Start.X, line.Start.Y), new Point2(line.End.X, line.End.Y)))
{
if (selected != null)
{
selected.Add(line);
return false;
}
else
{
return true;
}
}
return false;
}
/// <summary>
///
/// </summary>
/// <param name="line"></param>
/// <param name="v"></param>
/// <param name="threshold"></param>
/// <param name="dx"></param>
/// <param name="dy"></param>
/// <returns></returns>
public static BaseShape HitTestLine(XLine line, Vector2 v, double threshold, double dx, double dy)
{
if (ShapeBounds.GetPointBounds(line.Start, threshold, dx, dy).Contains(v))
{
return line.Start;
}
if (ShapeBounds.GetPointBounds(line.End, threshold, dx, dy).Contains(v))
{
return line.End;
}
if (ShapeBounds.Contains(line, v, threshold, dx, dy))
{
return line;
}
return null;
}
/// <summary>
/// Transfer selection state to <see cref="ToolState.Two"/>.
/// </summary>
public void ToStateTwo()
{
if (_p1HelperPoint != null)
{
_layer.Shapes = _layer.Shapes.Remove(_p1HelperPoint);
_p1HelperPoint = null;
}
if (_p2HelperPoint != null)
{
_layer.Shapes = _layer.Shapes.Remove(_p2HelperPoint);
_p2HelperPoint = null;
}
_startLine = XLine.Create(0, 0, _style, null);
_startHelperPoint = XPoint.Create(0, 0, _point);
_layer.Shapes = _layer.Shapes.Add(_startLine);
_layer.Shapes = _layer.Shapes.Add(_startHelperPoint);
}
/// <summary>
/// Get <see cref="XLine"/> maximum length for <see cref="LineFixedLengthFlags.Vertical"/> mode.
/// </summary>
/// <param name="line">The line shape.</param>
/// <param name="y1">The calculated Y coordinate for <see cref="XLine.Start"/> point.</param>
/// <param name="y2">The calculated Y coordinate for <see cref="XLine.End"/> point.</param>
public static void GetMaxLengthVertical(this XLine line, ref double y1, ref double y2)
{
var ls = line.Style.LineStyle;
bool shortenStart = ls.FixedLength.StartTrigger.Flags != ShapeStateFlags.Default &&
line.Start.State.Flags.HasFlag(ls.FixedLength.StartTrigger.Flags) &&
ls.FixedLength.Flags.HasFlag(LineFixedLengthFlags.Start);
bool shortenEnd = ls.FixedLength.EndTrigger.Flags != ShapeStateFlags.Default &&
line.End.State.Flags.HasFlag(ls.FixedLength.EndTrigger.Flags) &&
ls.FixedLength.Flags.HasFlag(LineFixedLengthFlags.End);
if (shortenStart && !shortenEnd)
{
if (y2 > y1)
{
y1 = y2 - ls.FixedLength.Length;
}
else
{
y1 = y2 + ls.FixedLength.Length;
}
}
if (!shortenStart && shortenEnd)
{
if (y2 > y1)
{
y2 = y1 + ls.FixedLength.Length;
}
else
{
y2 = y1 - ls.FixedLength.Length;
}
}
}
/// <summary>
/// Get <see cref="XLine"/> maximum length for <see cref="LineFixedLengthFlags.Horizontal"/> mode.
/// </summary>
/// <param name="line">The line shape.</param>
/// <param name="x1">The calculated X coordinate for <see cref="XLine.Start"/> point.</param>
/// <param name="x2">The calculated X coordinate for <see cref="XLine.End"/> point.</param>
public static void GetMaxLengthHorizontal(this XLine line, ref double x1, ref double x2)
{
var ls = line.Style.LineStyle;
bool shortenStart = ls.FixedLength.StartTrigger.Flags != ShapeStateFlags.Default &&
line.Start.State.Flags.HasFlag(ls.FixedLength.StartTrigger.Flags) &&
ls.FixedLength.Flags.HasFlag(LineFixedLengthFlags.Start);
bool shortenEnd = ls.FixedLength.EndTrigger.Flags != ShapeStateFlags.Default &&
line.End.State.Flags.HasFlag(ls.FixedLength.EndTrigger.Flags) &&
ls.FixedLength.Flags.HasFlag(LineFixedLengthFlags.End);
if (shortenStart && !shortenEnd)
{
if (x2 > x1)
{
x1 = x2 - ls.FixedLength.Length;
}
else
{
x1 = x2 + ls.FixedLength.Length;
}
}
if (!shortenStart && shortenEnd)
{
if (x2 > x1)
{
x2 = x1 + ls.FixedLength.Length;
}
else
{
x2 = x1 - ls.FixedLength.Length;
}
}
}
/// <inheritdoc/>
public override void Draw(object dc, XLine line, double dx, double dy, ImmutableArray<XProperty> db, XRecord r)
{
var canvas = dc as SKCanvas;
using (SKPaint strokeLine = ToSKPaintPen(line.Style, _scaleToPage, _sourceDpi, _targetDpi))
{
SKPoint pt1, pt2;
DrawLineArrowsInternal(canvas, line, dx, dy, out pt1, out pt2);
if (line.Style.LineStyle.IsCurved)
{
DrawLineCurveInternal(
canvas,
strokeLine, line.IsStroked,
ref pt1, ref pt2,
line.Style.LineStyle.Curvature,
line.Style.LineStyle.CurveOrientation,
line.Start.Alignment,
line.End.Alignment);
}
else
{
DrawLineInternal(canvas, strokeLine, line.IsStroked, ref pt1, ref pt2);
}
}
}
private void DrawLineArrowsInternal(SKCanvas canvas, XLine line, double dx, double dy, out SKPoint pt1, out SKPoint pt2)
{
using (SKPaint fillStartArrow = ToSKPaintBrush(line.Style.StartArrowStyle.Fill))
using (SKPaint strokeStartArrow = ToSKPaintPen(line.Style.StartArrowStyle, _scaleToPage, _sourceDpi, _targetDpi))
using (SKPaint fillEndArrow = ToSKPaintBrush(line.Style.EndArrowStyle.Fill))
using (SKPaint strokeEndArrow = ToSKPaintPen(line.Style.EndArrowStyle, _scaleToPage, _sourceDpi, _targetDpi))
{
double _x1 = line.Start.X + dx;
double _y1 = line.Start.Y + dy;
double _x2 = line.End.X + dx;
double _y2 = line.End.Y + dy;
line.GetMaxLength(ref _x1, ref _y1, ref _x2, ref _y2);
float x1 = _scaleToPage(_x1);
float y1 = _scaleToPage(_y1);
float x2 = _scaleToPage(_x2);
float y2 = _scaleToPage(_y2);
var sas = line.Style.StartArrowStyle;
var eas = line.Style.EndArrowStyle;
double a1 = Math.Atan2(y1 - y2, x1 - x2);
double a2 = Math.Atan2(y2 - y1, x2 - x1);
// Draw start arrow.
pt1 = DrawLineArrowInternal(canvas, strokeStartArrow, fillStartArrow, x1, y1, a1, sas);
// Draw end arrow.
pt2 = DrawLineArrowInternal(canvas, strokeEndArrow, fillEndArrow, x2, y2, a2, eas);
}
}
/// <inheritdoc/>
public override void Draw(object dc, XLine line, double dx, double dy, ImmutableArray<XProperty> db, XRecord r)
{
// TODO: Implement Draw line.
}
/// <inheritdoc/>
public override void Draw(object dc, XLine line, double dx, double dy, ImmutableArray<XProperty> db, XRecord r)
{
var _dc = dc as AM.DrawingContext;
AM.Pen strokeLine = ToPen(line.Style, _scaleToPage);
A.Point pt1, pt2;
DrawLineArrowsInternal(_dc, line, dx, dy, out pt1, out pt2);
if (line.Style.LineStyle.IsCurved)
{
DrawLineCurveInternal(
_dc,
strokeLine, line.IsStroked,
ref pt1, ref pt2,
line.Style.LineStyle.Curvature,
line.Style.LineStyle.CurveOrientation,
line.Start.Alignment,
line.End.Alignment);
}
else
{
DrawLineInternal(_dc, strokeLine, line.IsStroked, ref pt1, ref pt2);
}
}
public void Inherits_From_BaseShape()
{
var target = new XLine();
Assert.True(target is BaseShape);
}
/// <inheritdoc/>
public override void Draw(object dc, XLine line, double dx, double dy, ImmutableArray<XProperty> db, XRecord r)
{
var _dc = dc as DrawingContext;
var style = line.Style;
if (style == null)
return;
double zoom = _state.ZoomX;
double thicknessLine = style.Thickness / zoom;
double halfLine = thicknessLine / 2.0;
double thicknessStartArrow = style.StartArrowStyle.Thickness / zoom;
double halfStartArrow = thicknessStartArrow / 2.0;
double thicknessEndArrow = style.EndArrowStyle.Thickness / zoom;
double halfEndArrow = thicknessEndArrow / 2.0;
// Line style.
Tuple<Brush, Pen> styleCached = _styleCache.Get(style);
Brush fillLine;
Pen strokeLine;
if (styleCached != null)
{
fillLine = styleCached.Item1;
strokeLine = styleCached.Item2;
}
else
{
fillLine = CreateBrush(style.Fill);
strokeLine = CreatePen(style, thicknessLine);
_styleCache.Set(style, Tuple.Create(fillLine, strokeLine));
}
Point pt1, pt2;
DrawLineArrowsInternal(_dc, line, style, halfStartArrow, halfEndArrow, thicknessStartArrow, thicknessEndArrow, dx, dy, out pt1, out pt2);
if (line.Style.LineStyle.IsCurved)
{
DrawLineCurveInternal(_dc, halfLine, strokeLine, line, ref pt1, ref pt2, dx, dy);
}
else
{
DrawLineInternal(_dc, halfLine, strokeLine, line.IsStroked, ref pt1, ref pt2);
}
}
/// <summary>
/// Remove selection.
/// </summary>
public void Remove()
{
if (_line12 != null)
{
_layer.Shapes = _layer.Shapes.Remove(_line12);
_line12 = null;
}
if (_line43 != null)
{
_layer.Shapes = _layer.Shapes.Remove(_line43);
_line43 = null;
}
if (_line23 != null)
{
_layer.Shapes = _layer.Shapes.Remove(_line23);
_line23 = null;
}
if (_helperPoint1 != null)
{
_layer.Shapes = _layer.Shapes.Remove(_helperPoint1);
_helperPoint1 = null;
}
if (_helperPoint2 != null)
{
_layer.Shapes = _layer.Shapes.Remove(_helperPoint2);
_helperPoint2 = null;
}
if (_helperPoint3 != null)
{
_layer.Shapes = _layer.Shapes.Remove(_helperPoint3);
_helperPoint3 = null;
}
if (_helperPoint4 != null)
{
_layer.Shapes = _layer.Shapes.Remove(_helperPoint4);
_helperPoint4 = null;
}
_layer.Invalidate();
}
/// <inheritdoc/>
public override void Draw(object dc, XLine line, double dx, double dy, ImmutableArray<XProperty> db, XRecord r)
{
var _gfx = dc as Graphics;
Pen strokeLine = ToPen(line.Style, _scaleToPage);
PointF pt1, pt2;
DrawLineArrowsInternal(line, dx, dy, _gfx, out pt1, out pt2);
if (line.Style.LineStyle.IsCurved)
{
DrawLineCurveInternal(
_gfx,
strokeLine, line.IsStroked,
ref pt1, ref pt2,
line.Style.LineStyle.Curvature,
line.Style.LineStyle.CurveOrientation,
line.Start.Alignment,
line.End.Alignment);
}
else
{
DrawLineInternal(_gfx, strokeLine, line.IsStroked, ref pt1, ref pt2);
}
strokeLine.Dispose();
}
private void DrawLineArrowsInternal(XLine line, double dx, double dy, Graphics gfx, out PointF pt1, out PointF pt2)
{
Brush fillStartArrow = ToSolidBrush(line.Style.StartArrowStyle.Fill);
Pen strokeStartArrow = ToPen(line.Style.StartArrowStyle, _scaleToPage);
Brush fillEndArrow = ToSolidBrush(line.Style.EndArrowStyle.Fill);
Pen strokeEndArrow = ToPen(line.Style.EndArrowStyle, _scaleToPage);
double _x1 = line.Start.X + dx;
double _y1 = line.Start.Y + dy;
double _x2 = line.End.X + dx;
double _y2 = line.End.Y + dy;
line.GetMaxLength(ref _x1, ref _y1, ref _x2, ref _y2);
float x1 = _scaleToPage(_x1);
float y1 = _scaleToPage(_y1);
float x2 = _scaleToPage(_x2);
float y2 = _scaleToPage(_y2);
var sas = line.Style.StartArrowStyle;
var eas = line.Style.EndArrowStyle;
float a1 = (float)(Math.Atan2(y1 - y2, x1 - x2) * 180.0 / Math.PI);
float a2 = (float)(Math.Atan2(y2 - y1, x2 - x1) * 180.0 / Math.PI);
// Draw start arrow.
pt1 = DrawLineArrowInternal(gfx, strokeStartArrow, fillStartArrow, x1, y1, a1, sas);
// Draw end arrow.
pt2 = DrawLineArrowInternal(gfx, strokeEndArrow, fillEndArrow, x2, y2, a2, eas);
fillStartArrow.Dispose();
strokeStartArrow.Dispose();
fillEndArrow.Dispose();
strokeEndArrow.Dispose();
}
/// <inheritdoc/>
public override void LeftDown(double x, double y)
{
base.LeftDown(x, y);
var editor = _serviceProvider.GetService<ProjectEditor>();
double sx = editor.Project.Options.SnapToGrid ? ProjectEditor.Snap(x, editor.Project.Options.SnapX) : x;
double sy = editor.Project.Options.SnapToGrid ? ProjectEditor.Snap(y, editor.Project.Options.SnapY) : y;
switch (_currentState)
{
case ToolState.None:
{
var style = editor.Project.CurrentStyleLibrary.Selected;
_line = XLine.Create(
sx, sy,
editor.Project.Options.CloneStyle ? style.Clone() : style,
editor.Project.Options.PointShape,
editor.Project.Options.DefaultIsStroked);
if (editor.Project.Options.TryToConnect)
{
var result = editor.TryToGetConnectionPoint(sx, sy);
if (result != null)
{
_line.Start = result;
}
else
{
editor.TryToSplitLine(x, y, _line.Start);
}
}
editor.Project.CurrentContainer.WorkingLayer.Shapes = editor.Project.CurrentContainer.WorkingLayer.Shapes.Add(_line);
editor.Project.CurrentContainer.WorkingLayer.Invalidate();
ToStateOne();
Move(_line);
_currentState = ToolState.One;
editor.CancelAvailable = true;
}
break;
case ToolState.One:
{
if (_line != null)
{
_line.End.X = sx;
_line.End.Y = sy;
if (editor.Project.Options.TryToConnect)
{
var result = editor.TryToGetConnectionPoint(sx, sy);
if (result != null)
{
_line.End = result;
}
else
{
editor.TryToSplitLine(x, y, _line.End);
}
}
editor.Project.CurrentContainer.WorkingLayer.Shapes = editor.Project.CurrentContainer.WorkingLayer.Shapes.Remove(_line);
Remove();
base.Finalize(_line);
editor.Project.AddShape(editor.Project.CurrentContainer.CurrentLayer, _line);
_currentState = ToolState.None;
editor.CancelAvailable = false;
}
}
break;
}
}
private void DrawLineCurveInternal(DrawingContext dc, double half, Pen pen, XLine line, ref Point pt1, ref Point pt2, double dx, double dy)
{
double p1x = pt1.X;
double p1y = pt1.Y;
double p2x = pt2.X;
double p2y = pt2.Y;
XLineExtensions.GetCurvedLineBezierControlPoints(
line.Style.LineStyle.CurveOrientation,
line.Style.LineStyle.Curvature,
line.Start.Alignment,
line.End.Alignment,
ref p1x, ref p1y,
ref p2x, ref p2y);
PathGeometry pg = _curvedLineCache.Get(line);
if (pg != null)
{
var pf = pg.Figures[0];
pf.StartPoint = new Point(pt1.X + dx, pt1.Y + dy);
pf.IsFilled = false;
var bs = pf.Segments[0] as BezierSegment;
bs.Point1 = new Point(p1x + dx, p1y + dy);
bs.Point2 = new Point(p2x + dx, p2y + dy);
bs.Point3 = new Point(pt2.X + dx, pt2.Y + dy);
bs.IsStroked = line.IsStroked;
}
else
{
var pf = new PathFigure()
{
StartPoint = new Point(pt1.X + dx, pt1.Y + dy),
IsFilled = false
};
var bs = new BezierSegment(
new Point(p1x + dx, p1y + dy),
new Point(p2x + dx, p2y + dy),
new Point(pt2.X + dx, pt2.Y + dy),
line.IsStroked);
//bs.Freeze();
pf.Segments.Add(bs);
//pf.Freeze();
pg = new PathGeometry();
pg.Figures.Add(pf);
//pg.Freeze();
_curvedLineCache.Set(line, pg);
}
DrawPathGeometryInternal(dc, half, null, pen, line.IsStroked, false, pg);
}
private void DrawLineArrowsInternal(DrawingContext dc, XLine line, ShapeStyle style, double halfStart, double halfEnd, double thicknessStart, double thicknessEnd, double dx, double dy, out Point pt1, out Point pt2)
{
// Start arrow style.
Tuple<Brush, Pen> startArrowCache = _arrowStyleCache.Get(style.StartArrowStyle);
Brush fillStartArrow;
Pen strokeStartArrow;
if (startArrowCache != null)
{
fillStartArrow = startArrowCache.Item1;
strokeStartArrow = startArrowCache.Item2;
}
else
{
fillStartArrow = CreateBrush(style.StartArrowStyle.Fill);
strokeStartArrow = CreatePen(style.StartArrowStyle, thicknessStart);
_arrowStyleCache.Set(style.StartArrowStyle, Tuple.Create(fillStartArrow, strokeStartArrow));
}
// End arrow style.
Tuple<Brush, Pen> endArrowCache = _arrowStyleCache.Get(style.EndArrowStyle);
Brush fillEndArrow;
Pen strokeEndArrow;
if (endArrowCache != null)
{
fillEndArrow = endArrowCache.Item1;
strokeEndArrow = endArrowCache.Item2;
}
else
{
fillEndArrow = CreateBrush(style.EndArrowStyle.Fill);
strokeEndArrow = CreatePen(style.EndArrowStyle, thicknessEnd);
_arrowStyleCache.Set(style.EndArrowStyle, Tuple.Create(fillEndArrow, strokeEndArrow));
}
// Line max length.
double x1 = line.Start.X + dx;
double y1 = line.Start.Y + dy;
double x2 = line.End.X + dx;
double y2 = line.End.Y + dy;
line.GetMaxLength(ref x1, ref y1, ref x2, ref y2);
// Arrow transforms.
var sas = style.StartArrowStyle;
var eas = style.EndArrowStyle;
double a1 = Math.Atan2(y1 - y2, x1 - x2) * 180.0 / Math.PI;
double a2 = Math.Atan2(y2 - y1, x2 - x1) * 180.0 / Math.PI;
// Draw start arrow.
pt1 = DrawLineArrowInternal(dc, halfStart, strokeStartArrow, fillStartArrow, x1, y1, a1, sas);
// Draw end arrow.
pt2 = DrawLineArrowInternal(dc, halfEnd, strokeEndArrow, fillEndArrow, x2, y2, a2, eas);
}
/// <summary>
/// Checks if line contains point.
/// </summary>
/// <param name="line"></param>
/// <param name="v"></param>
/// <param name="threshold"></param>
/// <param name="dx"></param>
/// <param name="dy"></param>
/// <returns></returns>
public static bool Contains(XLine line, Vector2 v, double threshold, double dx, double dy)
{
var a = new Vector2(line.Start.X + dx, line.Start.Y + dy);
var b = new Vector2(line.End.X + dx, line.End.Y + dy);
var nearest = MathHelpers.NearestPointOnLine(a, b, v);
double distance = MathHelpers.Distance(v.X, v.Y, nearest.X, nearest.Y);
return distance < threshold;
}
/// <summary>
/// Remove selection.
/// </summary>
public void Remove()
{
if (_ellipse != null)
{
_layer.Shapes = _layer.Shapes.Remove(_ellipse);
_ellipse = null;
}
if (_startLine != null)
{
_layer.Shapes = _layer.Shapes.Remove(_startLine);
_startLine = null;
}
if (_endLine != null)
{
_layer.Shapes = _layer.Shapes.Remove(_endLine);
_endLine = null;
}
if (_p1HelperPoint != null)
{
_layer.Shapes = _layer.Shapes.Remove(_p1HelperPoint);
_p1HelperPoint = null;
}
if (_p2HelperPoint != null)
{
_layer.Shapes = _layer.Shapes.Remove(_p2HelperPoint);
_p2HelperPoint = null;
}
if (_centerHelperPoint != null)
{
_layer.Shapes = _layer.Shapes.Remove(_centerHelperPoint);
_centerHelperPoint = null;
}
if (_startHelperPoint != null)
{
_layer.Shapes = _layer.Shapes.Remove(_startHelperPoint);
_startHelperPoint = null;
}
if (_endHelperPoint != null)
{
_layer.Shapes = _layer.Shapes.Remove(_endHelperPoint);
_endHelperPoint = null;
}
_layer.Invalidate();
}
private void DrawLineArrowsInternal(AM.DrawingContext dc, XLine line, double dx, double dy, out A.Point pt1, out A.Point pt2)
{
AM.IBrush fillStartArrow = ToBrush(line.Style.StartArrowStyle.Fill);
AM.Pen strokeStartArrow = ToPen(line.Style.StartArrowStyle, _scaleToPage);
AM.IBrush fillEndArrow = ToBrush(line.Style.EndArrowStyle.Fill);
AM.Pen strokeEndArrow = ToPen(line.Style.EndArrowStyle, _scaleToPage);
double _x1 = line.Start.X + dx;
double _y1 = line.Start.Y + dy;
double _x2 = line.End.X + dx;
double _y2 = line.End.Y + dy;
line.GetMaxLength(ref _x1, ref _y1, ref _x2, ref _y2);
float x1 = _scaleToPage(_x1);
float y1 = _scaleToPage(_y1);
float x2 = _scaleToPage(_x2);
float y2 = _scaleToPage(_y2);
var sas = line.Style.StartArrowStyle;
var eas = line.Style.EndArrowStyle;
double a1 = Math.Atan2(y1 - y2, x1 - x2);
double a2 = Math.Atan2(y2 - y1, x2 - x1);
// Draw start arrow.
pt1 = DrawLineArrowInternal(dc, strokeStartArrow, fillStartArrow, x1, y1, a1, sas);
// Draw end arrow.
pt2 = DrawLineArrowInternal(dc, strokeEndArrow, fillEndArrow, x2, y2, a2, eas);
}
/// <summary>
/// Transfer selection state to <see cref="ToolState.Three"/>.
/// </summary>
public void ToStateThree()
{
if (_ellipse != null)
{
_layer.Shapes = _layer.Shapes.Remove(_ellipse);
_ellipse = null;
}
_endLine = XLine.Create(0, 0, _style, null);
_endHelperPoint = XPoint.Create(0, 0, _point);
_layer.Shapes = _layer.Shapes.Add(_endLine);
_layer.Shapes = _layer.Shapes.Add(_endHelperPoint);
}
/// <summary> /// Draws a <see cref="XLine"/> shape using drawing context. /// </summary> /// <param name="dc">The native drawing context.</param> /// <param name="line">The <see cref="XLine"/> shape.</param> /// <param name="dx">The X coordinate offset.</param> /// <param name="dy">The Y coordinate offset.</param> /// <param name="db">The properties database.</param> /// <param name="r">The data record.</param> public abstract void Draw(object dc, XLine line, double dx, double dy, ImmutableArray<XProperty> db, XRecord r);
