diff options
| author | Yuval Adam <yuv.adm@gmail.com> | 2014-08-08 14:42:07 +0300 |
|---|---|---|
| committer | Yuval Adam <yuv.adm@gmail.com> | 2014-08-08 14:42:07 +0300 |
| commit | a6163888f3c56123b1db313743c6147ba498732c (patch) | |
| tree | ff7d15d991d1d09ba6cbc0cec80924f57445bfdd /third_party/windows/fltk-1.1.10/src/Fl_Valuator.cxx | |
| parent | c3e4c9a25c2910d2d66d52215b3406b13d5b23d5 (diff) | |
Add third_party libs
Diffstat (limited to 'third_party/windows/fltk-1.1.10/src/Fl_Valuator.cxx')
| -rw-r--r-- | third_party/windows/fltk-1.1.10/src/Fl_Valuator.cxx | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/third_party/windows/fltk-1.1.10/src/Fl_Valuator.cxx b/third_party/windows/fltk-1.1.10/src/Fl_Valuator.cxx new file mode 100644 index 0000000..bdb829a --- /dev/null +++ b/third_party/windows/fltk-1.1.10/src/Fl_Valuator.cxx @@ -0,0 +1,149 @@ +//
+// "$Id: Fl_Valuator.cxx 5190 2006-06-09 16:16:34Z mike $"
+//
+// Valuator widget for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2005 by Bill Spitzak and others.
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+// USA.
+//
+// Please report all bugs and problems on the following page:
+//
+// http://www.fltk.org/str.php
+//
+
+// Base class for sliders and all other one-value "knobs"
+
+#include <FL/Fl.H>
+#include <FL/Fl_Valuator.H>
+#include <FL/math.h>
+#include <stdio.h>
+#include "flstring.h"
+
+Fl_Valuator::Fl_Valuator(int X, int Y, int W, int H, const char* L)
+ : Fl_Widget(X,Y,W,H,L) {
+ align(FL_ALIGN_BOTTOM);
+ when(FL_WHEN_CHANGED);
+ value_ = 0;
+ previous_value_ = 1;
+ min = 0;
+ max = 1;
+ A = 0.0;
+ B = 1;
+}
+
+const double epsilon = 4.66e-10;
+
+void Fl_Valuator::step(double s) {
+ if (s < 0) s = -s;
+ A = rint(s);
+ B = 1;
+ while (fabs(s-A/B) > epsilon && B<=(0x7fffffff/10)) {B *= 10; A = rint(s*B);}
+}
+
+void Fl_Valuator::precision(int p) {
+ A = 1.0;
+ for (B = 1; p--;) B *= 10;
+}
+
+void Fl_Valuator::value_damage() {damage(FL_DAMAGE_EXPOSE);} // by default do partial-redraw
+
+int Fl_Valuator::value(double v) {
+ clear_changed();
+ if (v == value_) return 0;
+ value_ = v;
+ value_damage();
+ return 1;
+}
+
+double Fl_Valuator::softclamp(double v) {
+ int which = (min<=max);
+ double p = previous_value_;
+ if ((v<min)==which && p!=min && (p<min)!=which) return min;
+ else if ((v>max)==which && p!=max && (p>max)!=which) return max;
+ else return v;
+}
+
+// inline void Fl_Valuator::handle_push() {previous_value_ = value_;}
+
+void Fl_Valuator::handle_drag(double v) {
+ if (v != value_) {
+ value_ = v;
+ value_damage();
+ set_changed();
+ if (when() & FL_WHEN_CHANGED) do_callback();
+ }
+}
+
+void Fl_Valuator::handle_release() {
+ if (when()&FL_WHEN_RELEASE) {
+ // insure changed() is off even if no callback is done. It may have
+ // been turned on by the drag, and then the slider returned to it's
+ // initial position:
+ clear_changed();
+ // now do the callback only if slider in new position or always is on:
+ if (value_ != previous_value_ || when() & FL_WHEN_NOT_CHANGED) {
+ do_callback();
+ }
+ }
+}
+
+double Fl_Valuator::round(double v) {
+ if (A) return rint(v*B/A)*A/B;
+ else return v;
+}
+
+double Fl_Valuator::clamp(double v) {
+ if ((v<min)==(min<=max)) return min;
+ else if ((v>max)==(min<=max)) return max;
+ else return v;
+}
+
+double Fl_Valuator::increment(double v, int n) {
+ if (!A) return v+n*(max-min)/100;
+ if (min > max) n = -n;
+ return (rint(v*B/A)+n)*A/B;
+}
+
+int Fl_Valuator::format(char* buffer) {
+ double v = value();
+ // MRS: THIS IS A HACK - RECOMMEND ADDING BUFFER SIZE ARGUMENT
+ if (!A || !B) return snprintf(buffer, 128, "%g", v);
+
+ // Figure out how many digits are required to correctly format the
+ // value.
+ int i, c = 0;
+ char temp[32];
+ // output a number with many digits after the decimal point. This
+ // seems to be needed to get high precission
+ snprintf(temp, sizeof(temp), "%.12f", A/B);
+ // strip all trailing 0's
+ for (i=strlen(temp)-1; i>0; i--) {
+ if (temp[i]!='0') break;
+ }
+ // count digits until we find the decimal point (or comma or whatever
+ // letter is set in the current locale)
+ for (; i>0; i--, c++) {
+ if (!isdigit(temp[i])) break;
+ }
+
+ // MRS: THIS IS A HACK - RECOMMEND ADDING BUFFER SIZE ARGUMENT
+ return snprintf(buffer, 128, "%.*f", c, v);
+}
+
+//
+// End of "$Id: Fl_Valuator.cxx 5190 2006-06-09 16:16:34Z mike $".
+//
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