src/Fl_Value_Output.cxx

   1 //
   2 // "$Id: Fl_Value_Output.cxx 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Value output widget for the Fast Light Tool Kit (FLTK).
   5 //
   6 // Copyright 1998-2010 by Bill Spitzak and others.
   7 //
   8 // This library is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU Library General Public
  10 // License as published by the Free Software Foundation; either
  11 // version 2 of the License, or (at your option) any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // Library General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU Library General Public
  19 // License along with this library; if not, write to the Free Software
  20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21 // USA.
  22 //
  23 // Please report all bugs and problems on the following page:
  24 //
  25 //     http://www.fltk.org/str.php
  26 //
  27
  28 // Fltk widget for drag-adjusting a floating point value.
  29 // This is much lighter than Fl_Value_Input because it has no text editor
  30 // If step() is zero then it can be used to display a floating-point value
  31
  32 #include <FL/Fl.H>
  33 #include <FL/Fl_Value_Output.H>
  34 #include <FL/fl_draw.H>
  35
  36 void Fl_Value_Output::draw() {
  37   Fl_Boxtype b = box() ? box() : FL_DOWN_BOX;
  38   int X = x()+Fl::box_dx(b);
  39   int Y = y()+Fl::box_dy(b);
  40   int W = w()-Fl::box_dw(b);
  41   int H = h()-Fl::box_dh(b);
  42   if (damage()&~FL_DAMAGE_CHILD)
  43     draw_box(b, color());
  44   else {
  45     fl_color(color());
  46     fl_rectf(X, Y, W, H);
  47   }
  48   char buf[128];
  49   format(buf);
  50   fl_color(active_r() ? textcolor() : fl_inactive(textcolor()));
  51   fl_font(textfont(), textsize());
  52   fl_draw(buf,X,Y,W,H,FL_ALIGN_LEFT);
  53 }
  54
  55 int Fl_Value_Output::handle(int event) {
  56   if (!step()) return 0;
  57   double v;
  58   int delta;
  59   int mx = Fl::event_x();
  60   static int ix, drag;
  61   switch (event) {
  62   case FL_PUSH:
  63     ix = mx;
  64     drag = Fl::event_button();
  65     handle_push();
  66     return 1;
  67   case FL_DRAG:
  68     delta = Fl::event_x()-ix;
  69     if (delta > 5) delta -= 5;
  70     else if (delta < -5) delta += 5;
  71     else delta = 0;
  72     switch (drag) {
  73     case 3: v = increment(previous_value(),delta*100); break;
  74     case 2: v = increment(previous_value(),delta*10); break;
  75     default:v = increment(previous_value(),delta); break;
  76     }
  77     v = round(v);
  78     handle_drag(soft()?softclamp(v):clamp(v));;
  79     return 1;
  80   case FL_RELEASE:
  81     handle_release();
  82     return 1;
  83   case FL_ENTER :
  84   case FL_LEAVE :
  85     return 1;
  86   default:
  87     return 0;
  88   }
  89 }
  90
  91 /**
  92   Creates a new Fl_Value_Output widget using the given
  93   position, size, and label string. The default boxtype is FL_NO_BOX.
  94   <P> Inherited destructor destroys the Valuator.
  95 */
  96 Fl_Value_Output::Fl_Value_Output(int X, int Y, int W, int H,const char *l)
  97 : Fl_Valuator(X,Y,W,H,l) {
  98   box(FL_NO_BOX);
  99   align(FL_ALIGN_LEFT);
 100   textfont_ = FL_HELVETICA;
 101   textsize_ = FL_NORMAL_SIZE;
 102   textcolor_ = FL_FOREGROUND_COLOR;
 103   soft_ = 0;
 104 }
 105
 106 //
 107 // End of "$Id: Fl_Value_Output.cxx 7903 2010-11-28 21:06:39Z matt $".
 108 //