private Transform2d GetTextPositionTransform(GFNFont fnt, string txt, double x, double y, double size, double angle, TextAlign align, Transform2d t)
{
//computes the transformation needed to transform text drawn at origo to get to the wanted position
Transform2d res = Transform2d.Translate(x, y);
if (angle != 0.0)
{
res = Transform2d.Rotate(angle) * res;
}
if (align != TextAlign.BaseLeft)
{
double dx, dy;
GetTextAlignDXDY(fnt, txt, size, align, out dx, out dy);
res = Transform2d.Translate(dx, dy) * res;
}
res = Transform2d.Scale(size / fnt.CapHeight) * res;
if (t != null)
{
return(res * t);
}
return(res);
}
public GFXPath GetTextPath(string txt, Transform2d transform)
{
GFNGlyph glyph;
if (txt == null)
{
return(null);
}
GFXPath res = new GFXPath();
foreach (char ch in txt)
{
if (CharLUT.TryGetValue(ch, out glyph))
{
GFXPath glyphpath = glyph.Path.TransformCopy(transform);
res.AppendPath(glyphpath);
transform = Transform2d.Translate(glyph.DX, 0.0) * transform; //move to next character
}
}
return(res);
}
public void DrawString(Painter painter, string txt, Transform2d xform)
{
/*double scale = txtsize / capheight;
* Transform2 tr = Transform2.Scale(scale)*Transform2.Translate(align_dx,align_dy)*Transform2.Rotate(angle)*Transform2.Translate(x, y);
*
* var oldt = painter.Transform;
* painter.Transform = tr * painter.Transform;*/
foreach (char ch in txt)
{
double dx = DrawGlyphT(ch, painter);
painter.Transform = Transform2d.Translate(dx, 0.0) * painter.Transform;
}
//painter.Transform = oldt;
}
void OnDrawAreaWheel(object sender, WheelEventArgs e)
{
Drawing drw = CurrentDrawing;
if (drw != null)
{
double scale;
if (e.Delta < 0)
{
scale = 0.8;
}
else
{
scale = 1.0 / 0.8;
}
drw.ViewTransform = drw.ViewTransform * Transform2d.Translate(-cursorpixel.X, -cursorpixel.Y) * Transform2d.Scale(scale) * Transform2d.Translate(cursorpixel.X, cursorpixel.Y);
drawarea.Redraw();
}
}
void OnDrawAreaMotion(object sender, MotionEventArgs e)
{
Drawing drw = CurrentDrawing;
if (drw != null)
{
var size = drawarea.PhysicalSize;
drawarea.Focused = true; //need focus for accepting wheel events
var newcursorpixel = new Point2i(e.X, size.Height - e.Y - 1);
double dx = newcursorpixel.X - cursorpixel.X;
double dy = newcursorpixel.Y - cursorpixel.Y;
cursorpixel = newcursorpixel;
if (e.Status.HasFlag(KeyStatus.MiddleButton))
{
drw.ViewTransform = drw.ViewTransform * Transform2d.Translate(dx, dy);
drawarea.Redraw();
return;
}
RedrawOverlay();
}
else
{
trackingpos = null;
}
// w.Caption = viewtransform.ToString(); // pt.ToString() + " " + e.Status.ToString();
//Caption = e.X.ToString();
SetCoordText();
}
public static void EllipticArcToBeziers(double cx, double cy, double aradius, double bradius, double tilt, double startangle, double sweepangle, List <double> xy)
{
int cnt = xy.Count;
double startpar = EllipseAngleToParam(startangle, aradius, bradius);
double endpar = EllipseAngleToParam(startangle + sweepangle, aradius, bradius);
if (sweepangle >= MathUtil.Deg360)
{ //full ellipse
endpar = startpar + MathUtil.Deg360;
}
else if (sweepangle <= -MathUtil.Deg360)
{
endpar = startpar - MathUtil.Deg360;
}
else if (sweepangle > 0.0) //ccw
{
if (endpar <= startpar)
{
endpar += MathUtil.Deg360;
}
}
else //cw
{
if (endpar >= startpar)
{
endpar -= MathUtil.Deg360;
}
}
double sweepparam = endpar - startpar;
double bulge = GetArcBulgeFromSweepAngle(sweepparam);
ArcToBeziers(Math.Cos(startpar), Math.Sin(startpar), Math.Cos(endpar), Math.Sin(endpar), bulge, xy);
//transform bezier circular arc to elliptical arc
Transform2d tr = Transform2d.Stretch(aradius, bradius) * Transform2d.Rotate(tilt) * Transform2d.Translate(cx, cy);
for (int l = cnt; l < xy.Count; l += 2)
{
double tx, ty;
tr.Apply(xy[l], xy[l + 1], out tx, out ty, true);
xy[l] = tx;
xy[l + 1] = ty;
}
}