/// <summary>
/// The Treenode t must have either 3 or four children
/// </summary>
/// <param name="t"></param>
/// <param name="tokens"></param>
/// <returns></returns>
public static Tikz_Arc FromCommonTree(ITree t, CommonTokenStream tokens)
{
Tikz_Arc ta = new Tikz_Arc();
if (t.ChildCount != 3 && t.ChildCount != 4)
{
throw new Exception("Parser returned invalid IM_ARC node.");
}
// if one of the children is not of type numberunit (i.e., math expression etc.), then the present arc will be marked invalid
for (int i = 0; i < t.ChildCount; i++)
if (t.GetChild(i).Type != simpletikzParser.IM_NUMBERUNIT)
ta.IsBroken = true;
if (!ta.IsBroken)
{
ta.phi1 = new Tikz_NumberUnit(t.GetChild(0));
ta.phi2 = new Tikz_NumberUnit(t.GetChild(1));
ta.r1 = new Tikz_NumberUnit(t.GetChild(2));
if (t.ChildCount == 4)
{
ta.r2 = new Tikz_NumberUnit(t.GetChild(3));
}
}
return ta;
}
public override void OnLeftMouseButtonDown(OverlayShape item, Point p, TEMouseArgs e)
{
if (!EnsureParseTreeExists())
return;
Point ptikz = overlay.Rasterizer.RasterizePixelToTikz(p);
p = overlay.Rasterizer.RasterizePixel(p);
if (ContinueWithBigImage(ptikz) == false)
return;
if (pointcount == 0)
{
//overlay.SetCorrectRaster(overlay.CurEditing, true);
center = ptikz;
// set raster to polar, and such that origin is at center
overlay.Rasterizer.View.IsCartesian = false;
TikzMatrix M = overlay.Rasterizer.View.CoordinateTransform;
M.m[0, 2] = center.X;
M.m[1, 2] = center.Y;
overlay.Rasterizer.View.CoordinateTransform = M;
pointcount = 1;
PreviewPie.center = PreviewArc.center = new Point(p.X, overlay.Height - p.Y);
////if (!overlay.canvas.Children.Contains(PreviewArc))
//// overlay.canvas.Children.Add(PreviewArc);
////if (!overlay.canvas.Children.Contains(PreviewPie))
//// overlay.canvas.Children.Add(PreviewPie);
}
else if (pointcount == 1)
{
p1 = ptikz;
pointcount = 2;
PreviewPie.p1 = PreviewArc.p2 = new Point(p.X, overlay.Height - p.Y);
// compute radius
TikzMatrix M = overlay.Rasterizer.View.CoordinateTransform;
Point ploc = M.Inverse().Transform(p1);
overlay.Rasterizer.View.ForceRadiusTo = (ploc - (new Point(0, 0))).Length;
}
else if (pointcount == 2)
{
// **** create arc / pie ****
overlay.BeginUpdate();
// find next tikzpicture and add
if (AddNewCurAddTo()) //(EnsureCurAddToExists(out lcreated))
{
// Pie?
if (IsPie)
{
// create new coordinate
Tikz_Coord tc = new Parser.Tikz_Coord();
tc.type = overlay.UsePolarCoordinates ? Parser.Tikz_CoordType.Polar : Parser.Tikz_CoordType.Cartesian;
curAddTo.AddChild(tc);
tc.SetAbsPos(center);
curAddTo.AddChild(new Parser.Tikz_Something(" -- "));
}
Tikz_Coord tc1 = new Parser.Tikz_Coord();
if (IsPie)
{
tc1.type = Tikz_CoordType.Polar;
tc1.deco = "++";
}
curAddTo.AddChild(tc1);
tc1.SetAbsPos(p1);
curAddTo.AddChild(new Parser.Tikz_Something(" "));
// create arc
Tikz_Arc ta = new Tikz_Arc();
curAddTo.AddChild(ta);
ta.SetFromPoints(center, ptikz, IsLargeArc);
if (IsPie)
curAddTo.AddChild(new Parser.Tikz_Something(" -- cycle"));
//tn.UpdateText();
curAddTo.UpdateText();
//tpict.UpdateText();
// draw the added object in the overlay
overlay.AddToDisplayTree(curAddTo);
}
overlay.EndUpdate();
// reset everything
pointcount = 0;
overlay.Rasterizer.View.ForceRadiusTo = -1;
overlay.SetCorrectRaster(overlay.CurEditing, true);
}
//Point p = new Point(e.GetPosition(canvas1).X, Height - e.GetPosition(canvas1).Y);
UpdatePreviewDisplay(p);
}