public void MoveNodes(UnitPoint position, IEnumerable<INodePoint> nodes)
{
if (m_undoBuffer.CanCapture)
m_undoBuffer.AddCommand(new EditCommandNodeMove(nodes));
foreach (INodePoint node in nodes)
{
node.SetPosition(position);
node.Finish();
}
}
public List<IDrawObject> GetHitObjects(ICanvas canvas, UnitPoint point)
{
List<IDrawObject> selected = new List<IDrawObject>();
foreach (ICanvasLayer layer in m_layers)
{
if (layer.Visible == false)
continue;
foreach (IDrawObject drawobject in layer.Objects)
{
if (drawobject.PointInObject(canvas, point))
selected.Add(drawobject);
}
}
return selected;
}
PointF Translate(UnitPoint point)
{
return(point.Point);
}
public bool HandleMouseDown(UnitPoint mouseunitpoint, ref bool handled)
{
handled = false;
if (m_nodes.Count == 0) // no nodes selected yet
{
if (m_canvas.Model.SelectedCount > 0)
{
foreach (IDrawObject obj in m_canvas.Model.SelectedObjects)
{
INodePoint p = obj.NodePoint(m_canvas, mouseunitpoint);
if (p != null)
m_nodes.Add(p);
}
}
handled = m_nodes.Count > 0;
if (handled)
m_originPoint = mouseunitpoint;
return handled;
}
// update selected nodes
m_canvas.Model.MoveNodes(mouseunitpoint, m_nodes);
m_nodes.Clear();
handled = true;
m_canvas.CanvasCtrl.DoInvalidate(true);
return handled;
}
public PointF ToScreen(UnitPoint unitpoint)
{
return(m_canvas.ToScreen(unitpoint));
}
private static UnitPoint NearestPointOnLine(UnitPoint lp1, UnitPoint lp2, UnitPoint testpoint, double roundToAngleR)
{
if (lp1.X == testpoint.X)
{
UnitPoint tmp = lp1;
lp1 = lp2;
lp2 = tmp;
}
double A1 = LineAngleR(lp1, testpoint, 0);
double A2 = LineAngleR(lp1, lp2, roundToAngleR);
double A = A1 - A2;
double h1 = (lp1.X - testpoint.X) / Math.Cos(A1);
double h2 = Math.Cos(A) * h1;
double x = Math.Cos(A2) * h2;
double y = Math.Sin(A2) * h2;
x = lp1.X - x;
y = lp1.Y - y;
return new UnitPoint((float)x, (float)y);
}
public static UnitPoint CenterPointFrom3Points(UnitPoint p1, UnitPoint p2, UnitPoint p3)
{
// http://local.wasp.uwa.edu.au/~pbourke/geometry/circlefrom3/
// 3 points forms 2 lines a and b, slope of a is ma, b is mb
// ma = (y2-y1) / (x2-x1)
// mb = (y3-y2) / (x3-x2)
double ma = (p2.Y - p1.Y) / (p2.X - p1.X);
double mb = (p3.Y - p2.Y) / (p3.X - p2.X);
// this is just a hacky work around for when p1-p2 are either horizontal or vertical.
// A real solution should be found, but for now this will work
if (double.IsInfinity(ma))
ma = 1000000000000;
if (double.IsInfinity(mb))
mb = 1000000000000;
if (ma == 0)
ma = 0.000000000001;
if (mb == 0f)
mb = 0.000000000001;
// centerpoint x = mamb(y1-y3) + mb(x1+x2) - ma(x2+x3) / 2(mb-ma)
double center_x = (ma * mb * (p1.Y - p3.Y) + mb * (p1.X + p2.X) - ma * (p2.X + p3.X)) / (2 * (mb - ma));
double center_y = (-1 * (center_x - (p1.X + p2.X) / 2) / ma) + ((p1.Y + p2.Y) / 2);
//m_Center.m_y = -1*(m_Center.x() - (pt1->x()+pt2->x())/2)/aSlope + (pt1->y()+pt2->y())/2;
return new UnitPoint((float)center_x, (float)center_y);
}
public static bool IsPointInLine(UnitPoint linepoint1, UnitPoint linepoint2, UnitPoint testpoint, float halflinewidth)
{
UnitPoint p1 = linepoint1;
UnitPoint p2 = linepoint2;
UnitPoint p3 = testpoint;
// check bounding rect, this is faster than creating a new rectangle and call r.Contains
double lineLeftPoint = Math.Min(p1.X, p2.X) - halflinewidth;
double lineRightPoint = Math.Max(p1.X, p2.X) + halflinewidth;
if (testpoint.X < lineLeftPoint || testpoint.X > lineRightPoint)
{
return(false);
}
double lineBottomPoint = Math.Min(p1.Y, p2.Y) - halflinewidth;
double lineTopPoint = Math.Max(p1.Y, p2.Y) + halflinewidth;
if (testpoint.Y < lineBottomPoint || testpoint.Y > lineTopPoint)
{
return(false);
}
// then check if it hits the endpoint
if (CircleHitPoint(p1, halflinewidth, p3))
{
return(true);
}
if (CircleHitPoint(p2, halflinewidth, p3))
{
return(true);
}
if (p1.Y == p2.Y) // line is horizontal
{
double min = Math.Min(p1.X, p2.X) - halflinewidth;
double max = Math.Max(p1.X, p2.X) + halflinewidth;
if (p3.X >= min && p3.X <= max)
{
return(true);
}
return(false);
}
if (p1.X == p2.X) // line is vertical
{
double min = Math.Min(p1.Y, p2.Y) - halflinewidth;
double max = Math.Max(p1.Y, p2.Y) + halflinewidth;
if (p3.Y >= min && p3.Y <= max)
{
return(true);
}
return(false);
}
// using COS law
// a^2 = b^2 + c^2 - 2bc COS A
// A = ACOS ((a^2 - b^2 - c^2) / (-2bc))
double xdiff = Math.Abs(p2.X - p3.X);
double ydiff = Math.Abs(p2.Y - p3.Y);
double aSquare = Math.Pow(xdiff, 2) + Math.Pow(ydiff, 2);
double a = Math.Sqrt(aSquare);
xdiff = Math.Abs(p1.X - p2.X);
ydiff = Math.Abs(p1.Y - p2.Y);
double bSquare = Math.Pow(xdiff, 2) + Math.Pow(ydiff, 2);
double b = Math.Sqrt(bSquare);
xdiff = Math.Abs(p1.X - p3.X);
ydiff = Math.Abs(p1.Y - p3.Y);
double cSquare = Math.Pow(xdiff, 2) + Math.Pow(ydiff, 2);
double c = Math.Sqrt(cSquare);
double A = Math.Acos(((aSquare - bSquare - cSquare) / (-2 * b * c)));
// once we have A we can find the height (distance from the line)
// SIN(A) = (h / c)
// h = SIN(A) * c;
double h = Math.Sin(A) * c;
// now if height is smaller than half linewidth, the hitpoint is within the line
return(h <= halflinewidth);
}
public static double Distance(UnitPoint p1, UnitPoint p2)
{
return(Distance(p1, p2, true));
}
public static UnitPoint OrthoPointD(UnitPoint lp1, UnitPoint lp2, double roundToAngleR)
{
return(OrthoPointR(lp1, lp2, DegressToRadians(roundToAngleR)));
}
public IDrawObject CreateObject(string type, UnitPoint point, ISnapPoint snappoint)
{
DrawingLayer layer = ActiveLayer as DrawingLayer;
if (layer.Enabled == false)
return null;
DrawTools.DrawObjectBase newobj = CreateObject(type);
if (newobj != null)
{
newobj.Layer = layer;
newobj.InitializeFromModel(point, layer, snappoint);
}
return newobj as IDrawObject;
}
public static UnitPoint LinesIntersectPoint(UnitPoint lp1, UnitPoint lp2, UnitPoint lp3, UnitPoint lp4)
{
double x = 0;
double y = 0;
if (LinesIntersect(lp1, lp2, lp3, lp4, ref x, ref y, true, false, false))
{
return(new UnitPoint(x, y));
}
return(UnitPoint.Empty);
}
public static UnitPoint FindApparentIntersectPoint(UnitPoint lp1, UnitPoint lp2, UnitPoint lp3, UnitPoint lp4, bool extendA, bool extendB)
{
double x = 0;
double y = 0;
if (LinesIntersect(lp1, lp2, lp3, lp4, ref x, ref y, true, extendA, extendB))
{
return(new UnitPoint(x, y));
}
return(UnitPoint.Empty);
}
public static bool LinesIntersect(UnitPoint lp1, UnitPoint lp2, UnitPoint lp3, UnitPoint lp4)
{
double x = 0;
double y = 0;
return(LinesIntersect(lp1, lp2, lp3, lp4, ref x, ref y, false, false, false));
}
private static bool LinesIntersect(UnitPoint lp1, UnitPoint lp2, UnitPoint lp3, UnitPoint lp4, ref double x, ref double y,
bool returnpoint,
bool extendA,
bool extendB)
{
// http://local.wasp.uwa.edu.au/~pbourke/geometry/lineline2d/
// line a is given by P1 and P2, point of intersect for line a (Pa) and b (Pb)
// Pa = P1 + ua ( P2 - P1 )
// Pb = P3 + ub ( P4 - P3 )
// ua(x) = ub(x) and ua(y) = ub (y)
// x1 + ua (x2 - x1) = x3 + ub (x4 - x3)
// y1 + ua (y2 - y1) = y3 + ub (y4 - y3)
// ua = ((x4-x3)(y1-y3) - (y4-y3)(x1-x3)) / ((x4-x3)(x2-x1) - (x4-x3)(y2-y1))
// ub = ((x2-x1)(y1-y3) - (y2-y1)(x1-x3)) / ((y4-y3)(x2-x1) - (x4-x3)(y2-y1))
// intersect point x = x1 + ua (x2 - x1)
// intersect point y = y1 + ua (y2 - y1)
double x1 = lp1.X;
double x2 = lp2.X;
double x3 = lp3.X;
double x4 = lp4.X;
double y1 = lp1.Y;
double y2 = lp2.Y;
double y3 = lp3.Y;
double y4 = lp4.Y;
double denominator = ((y4 - y3) * (x2 - x1) - (x4 - x3) * (y2 - y1));
if (denominator == 0) // lines are parallel
{
return(false);
}
double numerator_ua = ((x4 - x3) * (y1 - y3) - (y4 - y3) * (x1 - x3));
double numerator_ub = ((x2 - x1) * (y1 - y3) - (y2 - y1) * (x1 - x3));
double ua = numerator_ua / denominator;
double ub = numerator_ub / denominator;
// if a line is not extended then ua (or ub) must be between 0 and 1
if (extendA == false)
{
if (ua < 0 || ua > 1)
{
return(false);
}
}
if (extendB == false)
{
if (ub < 0 || ub > 1)
{
return(false);
}
}
if (extendA || extendB) // no need to chck range of ua and ub if check is one on lines
{
x = x1 + ua * (x2 - x1);
y = y1 + ua * (y2 - y1);
return(true);
}
if (ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1)
{
if (returnpoint)
{
x = x1 + ua * (x2 - x1);
y = y1 + ua * (y2 - y1);
}
return(true);
}
return(false);
}
static UnitPoint()
{
Empty = new UnitPoint();
Empty.m_x = double.NaN;
Empty.m_y = double.NaN;
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
/*
* if (m_commandType == eCommandType.pan)
* {
* m_panOffset.X += m_dragOffset.X;
* m_panOffset.Y += m_dragOffset.Y;
* m_dragOffset = new PointF(0, 0);
* }
*/
moving = false;
ispaste = false;
List <IDrawObject> hitlist = null;
Rectangle screenSelRect = Rectangle.Empty;
if (m_selection != null)
{
screenSelRect = m_selection.ScreenRect();
RectangleF selectionRect = m_selection.Selection(m_canvaswrapper);
if (CanvasCtrl.M_canvas.m_drawObjectId.Equals("Eraser"))
{
List <Line> l = CanvasCtrl.M_canvas.lines;
for (int i = l.Count - 1; i >= 0; i--)
{
if (l[i].P2.X <screenSelRect.Left || l[i].P1.X> screenSelRect.Right || l[i].P1.Y > screenSelRect.Bottom ||
l[i].P1.Y < screenSelRect.Top)
{
}
else
{
lines.RemoveAt(i);
}
}
}
else if (CanvasCtrl.M_canvas.m_drawObjectId.Equals("chance color"))
{
List <Line> l = CanvasCtrl.M_canvas.lines;
for (int i = l.Count - 1; i >= 0; i--)
{
if (l[i].P2.X <screenSelRect.Left || l[i].P1.X> screenSelRect.Right || l[i].P1.Y > screenSelRect.Bottom ||
l[i].P1.Y < screenSelRect.Top)
{
}
else
{
Line l1;
if (lines[i].isRed)
{
l1 = new Line(lines[i].P1, lines[i].P2, 0, false);
}
else
{
l1 = new Line(lines[i].P1, lines[i].P2, 0, true);
}
lines.RemoveAt(i);
lines.Add(l1);
}
}
}
else if (CanvasCtrl.M_canvas.m_drawObjectId.Equals("move"))
{
moving = true; //将移动状态设为正在移动
mr = new MovingRegion(screenSelRect); //新建移动范围
List <Line> selectedLines = mr.getLines(); //选中的线
lastY = e.Y; //设置初始纵轴位置
lastX = e.X; //设置初始横轴位置
List <Line> l = CanvasCtrl.M_canvas.lines;
for (int i = l.Count - 1; i >= 0; i--)
{
if (l[i].P2.X <screenSelRect.Left || l[i].P1.X> screenSelRect.Right || l[i].P1.Y > screenSelRect.Bottom ||
l[i].P1.Y < screenSelRect.Top)
{
}
else
{
Line l1 = new Line(l[i].P1, l[i].P2, l[i].S, l[i].isRed, l[i].Color);
selectedLines.Add(l1);
lines.Remove(l[i]);
}
}
}
else if (CanvasCtrl.M_canvas.m_drawObjectId.Equals("Cut"))
{
pr = new MovingRegion(screenSelRect); //新建移动范围
List <Line> selectedLines = pr.getLines(); //选中的线
lastY = e.Y; //设置初始纵轴位置
lastX = e.X; //设置初始横轴位置
List <Line> l = CanvasCtrl.M_canvas.lines;
for (int i = l.Count - 1; i >= 0; i--)
{
if (l[i].P2.X <screenSelRect.Left || l[i].P1.X> screenSelRect.Right || l[i].P1.Y > screenSelRect.Bottom ||
l[i].P1.Y < screenSelRect.Top)
{
}
else
{
Line l1 = new Line(l[i].P1, l[i].P2, l[i].S, l[i].isRed, l[i].Color);
selectedLines.Add(l1);
lines.Remove(l[i]);
}
}
}
else if (CanvasCtrl.M_canvas.m_drawObjectId.Equals("Copy"))
{
pr = new MovingRegion(screenSelRect); //新建移动范围
List <Line> selectedLines = pr.getLines(); //选中的线
lastY = e.Y; //设置初始纵轴位置
lastX = e.X; //设置初始横轴位置
List <Line> l = CanvasCtrl.M_canvas.lines;
for (int i = l.Count - 1; i >= 0; i--)
{
if (l[i].P2.X <screenSelRect.Left || l[i].P1.X> screenSelRect.Right || l[i].P1.Y > screenSelRect.Bottom ||
l[i].P1.Y < screenSelRect.Top)
{
}
else
{
Line l1 = new Line(l[i].P1, l[i].P2, l[i].S, l[i].isRed, l[i].Color);
selectedLines.Add(l1);
}
}
}
else if (CanvasCtrl.M_canvas.m_drawObjectId.Equals("Paste"))
{
ispaste = true;
}
else if (CanvasCtrl.M_canvas.m_drawObjectId.Equals("Pai"))
{
List <Line> l = CanvasCtrl.M_canvas.orlines;
if (e.Y >= 42 && e.Y < 177)
{
l.Add(new Line(new PointF(e.X, 40), new PointF(e.X, 179), Color.White, 5));
}
else if (e.Y >= 257 && e.Y < 393)
{
l.Add(new Line(new PointF(e.X, 255), new PointF(e.X, 395), Color.White, 5));
}
else if (e.Y >= 473 && e.Y < 609)
{
l.Add(new Line(new PointF(e.X, 470), new PointF(e.X, 608), Color.White, 5));
}
else if (e.Y >= 690 && e.Y < 820)
{
l.Add(new Line(new PointF(e.X, 688), new PointF(e.X, 822), Color.White, 5));
}
DoInvalidate(true);
}
else if (CanvasCtrl.M_canvas.m_drawObjectId.Equals("Jie"))
{
List <Line> l = CanvasCtrl.M_canvas.orlines;
if (e.Y >= 42 && e.Y < 177)
{
l.Add(new Line(new PointF(e.X, 42), new PointF(e.X, 177), Color.Black, 2));
}
else if (e.Y >= 257 && e.Y < 393)
{
l.Add(new Line(new PointF(e.X, 257), new PointF(e.X, 393), Color.Black, 2));
}
else if (e.Y >= 473 && e.Y < 609)
{
l.Add(new Line(new PointF(e.X, 473), new PointF(e.X, 609), Color.Black, 2));
}
else if (e.Y >= 690 && e.Y < 820)
{
l.Add(new Line(new PointF(e.X, 690), new PointF(e.X, 820), Color.Black, 2));
}
DoInvalidate(true);
}
if (selectionRect != RectangleF.Empty)
{
// is any selection rectangle. use it for selection
hitlist = m_model.GetHitObjects(m_canvaswrapper, selectionRect, m_selection.AnyPoint());
DoInvalidate(true);
}
else
{
// else use mouse point
UnitPoint mousepoint = ToUnit(new PointF(e.X, e.Y));
hitlist = m_model.GetHitObjects(m_canvaswrapper, mousepoint);
}
m_selection = null;
}
if (m_commandType == eCommandType.draw && m_newObject != null)
{
UnitPoint mousepoint = ToUnit(m_mousedownPoint);
if (m_snappoint != null)
{
mousepoint = m_snappoint.SnapPoint;
}
m_newObject.OnMouseUp(m_canvaswrapper, mousepoint, m_snappoint);
}
}
PointF Translate(UnitPoint point)
{
return point.Point;
}
public static UnitPoint OrthoPointR(UnitPoint lp1, UnitPoint lp2, double roundToAngleR)
{
return(NearestPointOnLine(lp1, lp2, lp2, roundToAngleR));
}
public static bool CircleIntersectWithLine(UnitPoint center, float radius, UnitPoint lp1, UnitPoint lp2)
{
// check if both points are inside the circle, in that case the line does not intersect the circle
if ((Distance(center, lp1) < radius && Distance(center, lp2) < radius))
{
return(false);
}
// find the nearest point from the line to center, if that point is smaller than radius,
// then the line does intersect the circle
UnitPoint np = NearestPointOnLine(lp1, lp2, center);
double dist = Distance(center, np);
if (dist <= radius)
{
return(true);
}
return(false);
}
public PointF ToScreen(UnitPoint unitpoint)
{
return m_canvas.ToScreen(unitpoint);
}
public static UnitPoint NearestPointOnLine(UnitPoint lp1, UnitPoint lp2, UnitPoint tp)
{
return(NearestPointOnLine(lp1, lp2, tp, false));
}
public void DrawLine(ICanvas canvas, Pen pen, UnitPoint p1, UnitPoint p2)
{
PointF tmpp1 = ToScreen(p1);
PointF tmpp2 = ToScreen(p2);
//Console.WriteLine("pen:(" + pen.Color + "," + pen.Width + ") tmpp1:(" + tmpp1.X + "," + tmpp1.Y + ") tmpp2:(" + tmpp2.X + "," + tmpp2.Y+")");
PointF tp = new PointF(tmpp2.X, tmpp1.Y);
canvas.Graphics.DrawLine(pen, tmpp1, tp);
}
public static double LineSlope(UnitPoint p1, UnitPoint p2)
{
return((p2.Y - p1.Y) / (p2.X - p1.X));
}
public static UnitPoint NearestPointOnLine(UnitPoint lp1, UnitPoint lp2, UnitPoint tp, bool beyondSegment)
{
if (lp1.X == lp2.X)
{
// if both points are to below, then choose the points closest to tp.y
if (beyondSegment == false && lp1.Y < tp.Y && lp2.Y < tp.Y)
return new UnitPoint(lp1.X, Math.Max(lp1.Y, lp2.Y));
// if both points are above, then choose the points closest to tp.y
if (beyondSegment == false && lp1.Y > tp.Y && lp2.Y > tp.Y)
return new UnitPoint(lp1.X, Math.Min(lp1.Y, lp2.Y));
// else the line is on both sides and pick tp.x as y point
return new UnitPoint(lp1.X, tp.Y);
}
if (lp1.Y == lp2.Y)
{
// if both points are to the right, then choose the points closest to tp.x
if (beyondSegment == false && lp1.X < tp.X && lp2.X < tp.X)
return new UnitPoint(Math.Max(lp1.X, lp2.X), lp1.Y);
// if both points are to the left, then choose the points closest to tp.x
if (beyondSegment == false && lp1.X > tp.X && lp2.X > tp.X)
return new UnitPoint(Math.Min(lp1.X, lp2.X), lp1.Y);
// else the line is on both sides and pick tp.x as x point
return new UnitPoint(tp.X, lp1.Y);
}
return NearestPointOnLine(lp1, lp2, tp, 0);
}
public static bool IsPointInLine(UnitPoint linepoint1, UnitPoint linepoint2, UnitPoint testpoint, float halflinewidth)
{
UnitPoint p1 = linepoint1;
UnitPoint p2 = linepoint2;
UnitPoint p3 = testpoint;
// check bounding rect, this is faster than creating a new rectangle and call r.Contains
double lineLeftPoint = Math.Min(p1.X, p2.X) - halflinewidth;
double lineRightPoint = Math.Max(p1.X, p2.X) + halflinewidth;
if (testpoint.X < lineLeftPoint || testpoint.X > lineRightPoint)
return false;
double lineBottomPoint = Math.Min(p1.Y, p2.Y) - halflinewidth;
double lineTopPoint = Math.Max(p1.Y, p2.Y) + halflinewidth;
if (testpoint.Y < lineBottomPoint || testpoint.Y > lineTopPoint)
return false;
// then check if it hits the endpoint
if (CircleHitPoint(p1, halflinewidth, p3))
return true;
if (CircleHitPoint(p2, halflinewidth, p3))
return true;
if (p1.Y == p2.Y) // line is horizontal
{
double min = Math.Min(p1.X, p2.X) - halflinewidth;
double max = Math.Max(p1.X, p2.X) + halflinewidth;
if (p3.X >= min && p3.X <= max)
return true;
return false;
}
if (p1.X == p2.X) // line is vertical
{
double min = Math.Min(p1.Y, p2.Y) - halflinewidth;
double max = Math.Max(p1.Y, p2.Y) + halflinewidth;
if (p3.Y >= min && p3.Y <= max)
return true;
return false;
}
// using COS law
// a^2 = b^2 + c^2 - 2bc COS A
// A = ACOS ((a^2 - b^2 - c^2) / (-2bc))
double xdiff = Math.Abs(p2.X - p3.X);
double ydiff = Math.Abs(p2.Y - p3.Y);
double aSquare = Math.Pow(xdiff, 2) + Math.Pow(ydiff, 2);
double a = Math.Sqrt(aSquare);
xdiff = Math.Abs(p1.X - p2.X);
ydiff = Math.Abs(p1.Y - p2.Y);
double bSquare = Math.Pow(xdiff, 2) + Math.Pow(ydiff, 2);
double b = Math.Sqrt(bSquare);
xdiff = Math.Abs(p1.X - p3.X);
ydiff = Math.Abs(p1.Y - p3.Y);
double cSquare = Math.Pow(xdiff, 2) + Math.Pow(ydiff, 2);
double c = Math.Sqrt(cSquare);
double A = Math.Acos(((aSquare - bSquare - cSquare) / (-2 * b * c)));
// once we have A we can find the height (distance from the line)
// SIN(A) = (h / c)
// h = SIN(A) * c;
double h = Math.Sin(A) * c;
// now if height is smaller than half linewidth, the hitpoint is within the line
return h <= halflinewidth;
}
public static double LineSlope(UnitPoint p1, UnitPoint p2)
{
return (p2.Y - p1.Y) / (p2.X - p1.X);
}
static UnitPoint()
{
Empty = new UnitPoint();
Empty.m_x = double.NaN;
Empty.m_y = double.NaN;
}
public RectangleF HandleMouseMoveForNode(UnitPoint mouseunitpoint)
{
RectangleF r = RectangleF.Empty;
if (m_nodes.Count == 0)
return r;
r = new RectangleF(m_originPoint.Point, new Size(0, 0));
r = RectangleF.Union(r, new RectangleF(mouseunitpoint.Point, new SizeF(0, 0)));
if (m_lastPoint != UnitPoint.Empty)
r = RectangleF.Union(r, new RectangleF(m_lastPoint.Point, new SizeF(0, 0)));
m_lastPoint = mouseunitpoint;
foreach (INodePoint p in m_nodes)
{
if (r == RectangleF.Empty)
r = p.GetClone().GetBoundingRect(m_canvas);
else
r = RectangleF.Union(r, p.GetClone().GetBoundingRect(m_canvas));
p.SetPosition(mouseunitpoint);
//m_canvas.RepaintObject(p.GetClone());
}
return r;
}
private static bool LinesIntersect(UnitPoint lp1, UnitPoint lp2, UnitPoint lp3, UnitPoint lp4, ref double x, ref double y,
bool returnpoint,
bool extendA,
bool extendB)
{
// http://local.wasp.uwa.edu.au/~pbourke/geometry/lineline2d/
// line a is given by P1 and P2, point of intersect for line a (Pa) and b (Pb)
// Pa = P1 + ua ( P2 - P1 )
// Pb = P3 + ub ( P4 - P3 )
// ua(x) = ub(x) and ua(y) = ub (y)
// x1 + ua (x2 - x1) = x3 + ub (x4 - x3)
// y1 + ua (y2 - y1) = y3 + ub (y4 - y3)
// ua = ((x4-x3)(y1-y3) - (y4-y3)(x1-x3)) / ((x4-x3)(x2-x1) - (x4-x3)(y2-y1))
// ub = ((x2-x1)(y1-y3) - (y2-y1)(x1-x3)) / ((y4-y3)(x2-x1) - (x4-x3)(y2-y1))
// intersect point x = x1 + ua (x2 - x1)
// intersect point y = y1 + ua (y2 - y1)
double x1 = lp1.X;
double x2 = lp2.X;
double x3 = lp3.X;
double x4 = lp4.X;
double y1 = lp1.Y;
double y2 = lp2.Y;
double y3 = lp3.Y;
double y4 = lp4.Y;
double denominator = ((y4 - y3) * (x2 - x1) - (x4 - x3) * (y2 - y1));
if (denominator == 0) // lines are parallel
return false;
double numerator_ua = ((x4 - x3) * (y1 - y3) - (y4 - y3) * (x1 - x3));
double numerator_ub = ((x2 - x1) * (y1 - y3) - (y2 - y1) * (x1 - x3));
double ua = numerator_ua / denominator;
double ub = numerator_ub / denominator;
// if a line is not extended then ua (or ub) must be between 0 and 1
if (extendA == false)
{
if (ua < 0 || ua > 1)
return false;
}
if (extendB == false)
{
if (ub < 0 || ub > 1)
return false;
}
if (extendA || extendB) // no need to chck range of ua and ub if check is one on lines
{
x = x1 + ua * (x2 - x1);
y = y1 + ua * (y2 - y1);
return true;
}
if (ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1)
{
if (returnpoint)
{
x = x1 + ua * (x2 - x1);
y = y1 + ua * (y2 - y1);
}
return true;
}
return false;
}
public ISnapPoint SnapPoint(ICanvas canvas, UnitPoint point, List<IDrawObject> otherobj)
{
foreach (IDrawObject obj in m_objects)
{
ISnapPoint sp = obj.SnapPoint(canvas, point, otherobj, null, null);
if (sp != null)
return sp;
}
return null;
}
public static bool LinesIntersect(UnitPoint lp1, UnitPoint lp2, UnitPoint lp3, UnitPoint lp4)
{
double x = 0;
double y = 0;
return LinesIntersect(lp1, lp2, lp3, lp4, ref x, ref y, false, false, false);
}
public void DrawLine(ICanvas canvas, Pen pen, UnitPoint p1, UnitPoint p2)
{
m_canvas.DrawLine(canvas, pen, p1, p2);
}
public static UnitPoint LinesIntersectPoint(UnitPoint lp1, UnitPoint lp2, UnitPoint lp3, UnitPoint lp4)
{
double x = 0;
double y = 0;
if (LinesIntersect(lp1, lp2, lp3, lp4, ref x, ref y, true, false, false))
return new UnitPoint(x, y);
return UnitPoint.Empty;
}
protected override void OnMouseDown(MouseEventArgs e)
{
m_mousedownPoint = new PointF(e.X, e.Y); // used when panning
m_dragOffset = new PointF(0, 0);
//移动音符放下
if (moving)
{
moving = false;
lines.AddRange(mr.getLines());
}
if (ispaste)
{
ispaste = false;
List <Line> l = pr.getLines();
for (int i = 0; i < l.Count; i++)
{
Line l1 = new Line(l[i].P1, l[i].P2, l[i].S, l[i].isRed, l[i].Color);
lines.Add(l1);
}
}
if (m_drawObjectId.Equals("StartPoint"))
{
TestForm.setStartPoint(e.X, e.Y);
}
UnitPoint mousepoint = ToUnit(m_mousedownPoint);
if (m_snappoint != null)
{
mousepoint = m_snappoint.SnapPoint;
}
if (m_commandType == eCommandType.select)
{
bool handled = false;
if (m_nodeMoveHelper.HandleMouseDown(mousepoint, ref handled))
{
m_commandType = eCommandType.editNode;
m_snappoint = null;
base.OnMouseDown(e);
return;
}
m_selection = new SelectionRectangle(m_mousedownPoint);
}
/*
* if (m_commandType == eCommandType.move)
* {
* m_moveHelper.HandleMouseDownForMove(mousepoint, m_snappoint);
* }
* */
if (m_commandType == eCommandType.draw)
{
HandleMouseDownWhenDrawing(mousepoint, null);
DoInvalidate(true);
}
else if (m_commandType == eCommandType.symbol)
{
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(TestForm));
CanvasWrapper canvastest = new CanvasWrapper(this, Graphics.FromImage(m_staticImage), ClientRectangle);
canvastest.Graphics.SmoothingMode = m_smoothingMode;
if (m_drawObjectId == "clef1" || m_drawObjectId == "clef2" || m_drawObjectId == "clef3" || m_drawObjectId == "clef4" || m_drawObjectId == "clef6" || m_drawObjectId == "N2" ||
m_drawObjectId == "N3" || m_drawObjectId == "N4" || m_drawObjectId == "N5" || m_drawObjectId == "N6" || m_drawObjectId == "N7" || m_drawObjectId == "N8" || m_drawObjectId == "N9" ||
m_drawObjectId == "N10" || m_drawObjectId == "N11" || m_drawObjectId == "N12" || m_drawObjectId == "s10" || m_drawObjectId == "s11" || m_drawObjectId == "s12" ||
m_drawObjectId == "N12" || m_drawObjectId == "N13")
{
// MessageBox.Show("test test " + m_drawObjectId);
DrawSymbol(canvastest, e.X, e.Y, ((System.Drawing.Image)(resources.GetObject("ribbonButton_" + m_drawObjectId + ".Image"))), 1);
}
else if (m_drawObjectId == "bm1" || m_drawObjectId == "bm2" || m_drawObjectId == "bm3" || m_drawObjectId == "bm4" ||
m_drawObjectId == "bm5" || m_drawObjectId == "bm6" || m_drawObjectId == "bm7" || m_drawObjectId == "bm8" ||
m_drawObjectId == "bm18" || m_drawObjectId == "o11")
{
DrawSymbol(canvastest, e.X, e.Y, ((System.Drawing.Image)(resources.GetObject("ribbonButton_" + m_drawObjectId + ".Image"))), 0.7);
}
else
{
// MessageBox.Show("test test " + m_drawObjectId);
DrawSymbol(canvastest, e.X, e.Y, ((System.Drawing.Image)(resources.GetObject("ribbonButton_" + m_drawObjectId + ".Image"))), 0.4);
}
canvastest.CanvasCtrl.Refresh();
}
/*
* if (m_commandType == eCommandType.edit)
* {
* if (m_editTool == null)
* m_editTool = m_model.GetEditTool(m_editToolId);
* if (m_editTool != null)
* {
* if (m_editTool.SupportSelection)
* m_selection = new SelectionRectangle(m_mousedownPoint);
*
* eDrawObjectMouseDown mouseresult = m_editTool.OnMouseDown(m_canvaswrapper, mousepoint, m_snappoint);
* // /*
* // if (mouseresult == eDrawObjectMouseDown.Continue)
* // {
* // if (m_editTool.SupportSelection)
* // m_selection = new SelectionRectangle(m_mousedownPoint);
* // }
* // * * /
* //
* if (mouseresult == eDrawObjectMouseDown.Done)
* {
* m_editTool.Finished();
* m_editTool = m_model.GetEditTool(m_editToolId); // continue with new tool
* //m_editTool = null;
*
* if (m_editTool.SupportSelection)
* m_selection = new SelectionRectangle(m_mousedownPoint);
* }
* }
* DoInvalidate(true);
* UpdateCursor();
* }
*/
base.OnMouseDown(e);
}
public static UnitPoint FindApparentIntersectPoint(UnitPoint lp1, UnitPoint lp2, UnitPoint lp3, UnitPoint lp4, bool extendA, bool extendB)
{
double x = 0;
double y = 0;
if (LinesIntersect(lp1, lp2, lp3, lp4, ref x, ref y, true, extendA, extendB))
return new UnitPoint(x, y);
return UnitPoint.Empty;
}
public ISnapPoint SnapPoint(ICanvas canvas, UnitPoint point, Type[] runningsnaptypes, Type usersnaptype)
{
List<IDrawObject> objects = GetHitObjects(canvas, point);
if (objects.Count == 0)
return null;
foreach (IDrawObject obj in objects)
{
ISnapPoint snap = obj.SnapPoint(canvas, point, objects, runningsnaptypes, usersnaptype);
if (snap != null)
return snap;
}
return null;
}
public static bool LineIntersectWithRect(UnitPoint lp1, UnitPoint lp2, RectangleF r)
{
if (r.Contains(lp1.Point))
return true;
if (r.Contains(lp2.Point))
return true;
// the rectangle bottom is top in world units and top is bottom!, confused?
// check left
UnitPoint p3 = new UnitPoint(r.Left, r.Top);
UnitPoint p4 = new UnitPoint(r.Left, r.Bottom);
if (LinesIntersect(lp1, lp2, p3, p4))
return true;
// check bottom
p4.Y = r.Top;
p4.X = r.Right;
if (LinesIntersect(lp1, lp2, p3, p4))
return true;
// check right
p3.X = r.Right;
p3.Y = r.Top;
p4.X = r.Right;
p4.Y = r.Bottom;
if (LinesIntersect(lp1, lp2, p3, p4))
return true;
return false;
}
public static UnitPoint LineMidpoint(UnitPoint lp1, UnitPoint lp2)
{
UnitPoint mid = new UnitPoint();
mid.X = (lp1.X + lp2.X) / 2;
mid.Y = (lp1.Y + lp2.Y) / 2;
return mid;
}
public static double LineAngleR(UnitPoint lp1, UnitPoint lp2, double roundToAngleR)
{
if (lp1.X == lp2.X)
{
if (lp1.Y > lp2.Y)
return Math.PI * 6 / 4;
if (lp1.Y < lp2.Y)
return Math.PI / 2;
return 0;
}
// first find angle A
double adjacent = lp2.X - lp1.X;
double opposite = lp2.Y - lp1.Y;
// find angle A
double A = Math.Atan(opposite / adjacent);
if (adjacent < 0) // 2nd and 3rd quadrant
A += Math.PI; // + 180
if (adjacent > 0 && opposite < 0) // 4th quadrant
A += Math.PI * 2; // +360
if (roundToAngleR != 0)
{
double roundUnit = Math.Round(A / roundToAngleR);
A = roundToAngleR * roundUnit;
}
return A;
}
/*
public PointF SnapPoint(PointF unitmousepoint)
{
return PointF.Empty;
}
public string Id
{
get { return "background"; }
}
* * * */
ISnapPoint ICanvasLayer.SnapPoint(ICanvas canvas, UnitPoint point, List<IDrawObject> otherobj)
{
throw new Exception("The method or operation is not implemented.");
}
public static UnitPoint OrthoPointD(UnitPoint lp1, UnitPoint lp2, double roundToAngleR)
{
return OrthoPointR(lp1, lp2, DegressToRadians(roundToAngleR));
}
public void DrawLine(ICanvas canvas, Pen pen, UnitPoint p1, UnitPoint p2)
{
m_canvas.DrawLine(canvas, pen, p1, p2);
}
public static UnitPoint OrthoPointR(UnitPoint lp1, UnitPoint lp2, double roundToAngleR)
{
return NearestPointOnLine(lp1, lp2, lp2, roundToAngleR);
}
public PointF ToScreen(UnitPoint point)
{
PointF transformedPoint = Translate(point);
transformedPoint.Y = ScreenHeight() - transformedPoint.Y;
transformedPoint.Y *= m_screenResolution * m_model.Zoom;
transformedPoint.X *= m_screenResolution * m_model.Zoom;
transformedPoint.X += m_panOffset.X + m_dragOffset.X;
transformedPoint.Y += m_panOffset.Y + m_dragOffset.Y;
return transformedPoint;
}
public static UnitPoint NearestPointOnLine(UnitPoint lp1, UnitPoint lp2, UnitPoint tp)
{
return NearestPointOnLine(lp1, lp2, tp, false);
}
public virtual void HandleMouseDownWhenDrawing(UnitPoint mouseunitpoint, ISnapPoint snappoint)
{
if (m_commandType == eCommandType.draw)
{
if (m_newObject == null)
{
m_newObject = m_model.CreateObject(m_drawObjectId, mouseunitpoint, snappoint);
DoInvalidate(false, m_newObject.GetBoundingRect(m_canvaswrapper));
}
else
{
if (m_newObject != null)
{
eDrawObjectMouseDown result = m_newObject.OnMouseDown(m_canvaswrapper, mouseunitpoint, snappoint);
switch (result)
{
case eDrawObjectMouseDown.Done:
m_model.AddObject(m_model.ActiveLayer, m_newObject);
m_newObject = null;
DoInvalidate(true);
break;
case eDrawObjectMouseDown.DoneRepeat:
m_model.AddObject(m_model.ActiveLayer, m_newObject);
m_newObject = m_model.CreateObject(m_newObject.Id, m_newObject.RepeatStartingPoint, null);
DoInvalidate(true);
break;
case eDrawObjectMouseDown.Continue:
break;
}
}
}
}
}
/*
* public PointF SnapPoint(PointF unitmousepoint)
* {
* return PointF.Empty;
* }
* public string Id
* {
* get { return "background"; }
* }
* * * */
ISnapPoint ICanvasLayer.SnapPoint(ICanvas canvas, UnitPoint point, List <IDrawObject> otherobj)
{
throw new Exception("The method or operation is not implemented.");
}
