src/Fl_Progress.cxx

   1 //
   2 // "$Id: Fl_Progress.cxx 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Progress bar widget routines.
   5 //
   6 // Copyright 2000-2010 by Michael Sweet.
   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 // Contents:
  28
  29 //
  30 //   Fl_Progress::draw()        - Draw the check button.
  31 //   Fl_Progress::Fl_Progress() - Construct a Fl_Progress widget.
  32 //
  33
  34 //
  35 // Include necessary header files...
  36 //
  37
  38 #include <FL/Fl.H>
  39 #include <FL/Fl_Progress.H>
  40 #include <FL/fl_draw.H>
  41
  42
  43 //
  44 // Fl_Progress is a progress bar widget based off Fl_Widget that shows a
  45 // standard progress bar...
  46 //
  47
  48
  49 //
  50 // 'Fl_Progress::draw()' - Draw the progress bar.
  51 //
  52
  53 /** Draws the progress bar. */
  54 void Fl_Progress::draw()
  55 {
  56   int   progress;       // Size of progress bar...
  57   int   bx, by, bw, bh; // Box areas...
  58   int   tx, tw;         // Temporary X + width
  59
  60
  61   // Get the box borders...
  62   bx = Fl::box_dx(box());
  63   by = Fl::box_dy(box());
  64   bw = Fl::box_dw(box());
  65   bh = Fl::box_dh(box());
  66
  67   tx = x() + bx;
  68   tw = w() - bw;
  69
  70   // Draw the progress bar...
  71   if (maximum_ > minimum_)
  72     progress = (int)(w() * (value_ - minimum_) / (maximum_ - minimum_) + 0.5f);
  73   else
  74     progress = 0;
  75
  76   // Draw the box and label...
  77   if (progress > 0) {
  78     Fl_Color c = labelcolor();
  79     labelcolor(fl_contrast(labelcolor(), selection_color()));
  80
  81     fl_push_clip(x(), y(), progress + bx, h());
  82       draw_box(box(), x(), y(), w(), h(), active_r() ? selection_color() : fl_inactive(selection_color()));
  83       draw_label(tx, y() + by, tw, h() - bh);
  84     fl_pop_clip();
  85
  86     labelcolor(c);
  87
  88     if (progress<w()) {
  89       fl_push_clip(tx + progress, y(), w() - progress, h());
  90         draw_box(box(), x(), y(), w(), h(), active_r() ? color() : fl_inactive(color()));
  91         draw_label(tx, y() + by, tw, h() - bh);
  92       fl_pop_clip();
  93     }
  94   } else {
  95     draw_box(box(), x(), y(), w(), h(), active_r() ? color() : fl_inactive(color()));
  96     draw_label(tx, y() + by, tw, h() - bh);
  97   }
  98 }
  99
 100
 101 /**
 102     The constructor creates the progress bar using the position, size, and label.
 103
 104     You can set the background color with color() and the
 105     progress bar color with selection_color(), or you can set both colors
 106     together with color(unsigned bg, unsigned sel).
 107
 108     The default colors are FL_BACKGROUND2_COLOR and FL_YELLOW, resp.
 109 */
 110 Fl_Progress::Fl_Progress(int X, int Y, int W, int H, const char* L)
 111 : Fl_Widget(X, Y, W, H, L) {
 112   align(FL_ALIGN_INSIDE);
 113   box(FL_DOWN_BOX);
 114   color(FL_BACKGROUND2_COLOR, FL_YELLOW);
 115   minimum(0.0f);
 116   maximum(100.0f);
 117   value(0.0f);
 118 }
 119
 120
 121 //
 122 // End of "$Id: Fl_Progress.cxx 7903 2010-11-28 21:06:39Z matt $".
 123 //