Replace the C++ implementation with the Rust port

The Rust port (formerly gipfel-rs) is now the official successor to the
FLTK/GSL C++ code base. This squashes the port into a single commit and
removes the C++ sources (they remain in the git history below).

Layout:
  crates/gipfel-core  headless core: hills, panorama geometry, projections
                      (maxima-generated derivatives), pure-Rust LM fit,
                      gipfel: JPEG comment + EXIF I/O, profiles, stitching
  crates/gipfel-cli   command-line tools (export, info, stitch, profiles)
  crates/gipfel-app   Cosmic DE (libcosmic) GUI, binary name `gipfel`
  codegen/            maxima scripts + regen.sh for the projection code
  tests/              golden files + C++ reference harnesses (historical)

The original README is kept for now; it will be updated to describe the
Rust build. gipfel.dat, AUTHORS, ChangeLog and NEWS are unchanged.

1 files changed, 0 insertions, 67 deletions

diff --git a/src/Fl_Value_Dial.cxx b/src/Fl_Value_Dial.cxx
deleted file mode 100644
index 9b54458..0000000
--- a/src/Fl_Value_Dial.cxx
+++ /dev/null
@@ -1,67 +0,0 @@
-//
-// Copyright 2006-2009 Johannes Hofmann <Johannes.Hofmann@gmx.de>
-//
-// This software may be used and distributed according to the terms
-// of the GNU General Public License, incorporated herein by reference.
-
-#include <FL/Fl.H>
-#include <FL/fl_draw.H>
-#include <math.h>
-#include "Fl_Value_Dial.H"
-
-Fl_Value_Dial::Fl_Value_Dial(int X, int Y, int W, int H, const char*l)
-	: Fl_Dial(X,Y,W,H,l)
-{
-	step(1,100);
-	textfont_ = FL_HELVETICA;
-	textsize_ = 10;
-	textcolor_ = FL_BLACK;
-}
-
-void Fl_Value_Dial::draw() {
-	int sxx = x(), syy = y(), sww = w(), shh = h();
-	int bxx = x(), byy = y(), bww = w(), bhh = h();
-	char buf[128];
-
-	if (damage()&FL_DAMAGE_ALL) draw_box(box(),sxx,syy,sww,shh,color());
-	Fl_Dial::draw(sxx+Fl::box_dx(box()),
-		syy+Fl::box_dy(box()),
-		sww-Fl::box_dw(box()),
-		shh-Fl::box_dh(box()));
-
-	format(buf); // prints at most 20 chars
-	fl_font(textfont(), textsize());
-
-	fl_color(active_r() ? textcolor() : fl_inactive(textcolor()));
-	fl_draw(buf, bxx, byy + fl_height() - 2, bww, bhh, FL_ALIGN_TOP);
-}
-
-int Fl_Value_Dial::handle(int event) {  
-	switch (event) {
-		case FL_KEYBOARD :
-			switch (Fl::event_key()) {
-				case FL_Left:
-					handle_drag(clamp(increment(value(),-1)));
-					handle_release();
-					return 1;
-				case FL_Right:
-					handle_drag(clamp(increment(value(),1)));
-					handle_release();
-					return 1;
-				default:
-					return 0;
-			}
-			break; 
-		case FL_FOCUS :
-		case FL_UNFOCUS :
-			if (Fl::visible_focus()) {
-				redraw();
-				return 1;
-			} else return 0;
-		case FL_ENTER :
-		case FL_LEAVE :
-			return 1;
-		default:
-			return Fl_Dial::handle(event);
-	}
-}