public override void OnLeftMouseButtonDown(OverlayShapeVM item, Point p, TEMouseArgs e)
{
if (!EnsureParseTreeExists())
{
return;
}
Point prast = overlay.Rasterizer.RasterizePixel(p);
p = overlay.Rasterizer.RasterizePixelToTikz(p);
if (ContinueWithBigImage(p) == false)
{
return;
}
overlay.BeginUpdate();
overlay.SetCorrectRaster(overlay.CurEditing, true);
//Point p = new Point(e.GetPosition(canvas1).X, Height - e.GetPosition(canvas1).Y);
// find next tikzpicture and add
bool lcreated;
if (EnsureCurAddToExists(out lcreated))
{
{
// there are three states: (i) new path -> add coordinate
// (ii) add controlpoints
// (iii) 2 cps's added -> add bezier segment
if (CPCount == 2)
{
// add controls
Tikz_Controls tcont = new Tikz_Controls();
tcont.starttag = " .. controls ";
tcont.endtag = " ..";
Parser.Tikz_Coord tc1 = new Parser.Tikz_Coord(), tc2 = new Parser.Tikz_Coord(); // control points
tc1.type = tc2.type = overlay.UsePolarCoordinates ? Parser.Tikz_CoordType.Polar : Parser.Tikz_CoordType.Cartesian;
tcont.AddChild(tc1);
tcont.AddChild(new Tikz_Something(" and "));
tcont.AddChild(tc2);
curAddTo.AddChild(tcont);
// the endpoint
Parser.Tikz_Coord tcend = new Parser.Tikz_Coord();
tcend.type = overlay.UsePolarCoordinates ? Parser.Tikz_CoordType.Polar : Parser.Tikz_CoordType.Cartesian;
curAddTo.AddChild(new Tikz_Something(" "));
curAddTo.AddChild(tcend);
// do it here since the coordinate calculation needs the parents' coord. transform, and the second added point
tcend.SetAbsPos(p);
tc1.SetAbsPos(CP1);
tc2.SetAbsPos(CP2);
tcont.UpdateText();
tcend.UpdateText();
// draw the added objects in the overlay
// overlay.AddToDisplayTree(tcend);
// overlay.AddToDisplayTree(tcont);
CPCount = 0;
Preview_CP1.Visible = Preview_CP2.Visible = false;
}
else if (lcreated)
{
// add starting point
// create new coordinate
Parser.Tikz_Coord tc = new Parser.Tikz_Coord();
tc.type = overlay.UsePolarCoordinates ? Parser.Tikz_CoordType.Polar : Parser.Tikz_CoordType.Cartesian;
curAddTo.AddChild(tc);
// do it here since the coordinate calculation needs the parents' coord. transform
tc.SetAbsPos(new Point(p.X, p.Y)); //hack
curAddTo.UpdateText();
// draw the added object in the overlay
// overlay.AddToDisplayTree(tc);
CPCount = 0;
}
else
{
// remember control points
if (CPCount == 0)
{
CP1 = p;
Preview_CP1.SetCenter(prast.X, prast.Y);
////Canvas.SetLeft(Preview_CP1, prast.X - Preview_CP1.Width / 2);
////Canvas.SetBottom(Preview_CP1, prast.Y - Preview_CP1.Height / 2);
////if (!overlay.canvas.Children.Contains(Preview_CP1))
//// overlay.canvas.Children.Add(Preview_CP1);
////Preview_CP1.Visibility = Visibility.Visible;
Preview_CP1.Visible = true;
}
else if (CPCount == 1)
{
CP2 = p;
Preview_CP2.SetCenter(prast.X, prast.Y);
////Canvas.SetLeft(Preview_CP2, prast.X - Preview_CP2.Width / 2);
////Canvas.SetBottom(Preview_CP2, prast.Y - Preview_CP2.Height / 2);
////if (!overlay.canvas.Children.Contains(Preview_CP2))
//// overlay.canvas.Children.Add(Preview_CP2);
////Preview_CP2.Visibility = Visibility.Visible;
Preview_CP2.Visible = true;
}
CPCount++;
}
}
}
overlay.EndUpdate();
}
