src/Fl_Light_Button.cxx

   1 //
   2 // "$Id: Fl_Light_Button.cxx 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Lighted button 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 // Subclass of Fl_Button where the "box" indicates whether it is
  29 // pushed or not, and the "down box" is drawn small and square on
  30 // the left to indicate the current state.
  31
  32 // The default down_box of zero draws a rectangle designed to look
  33 // just like Flame's buttons.
  34
  35 #include <FL/Fl.H>
  36 #include <FL/Fl_Light_Button.H>
  37 #include <FL/fl_draw.H>
  38 #include "flstring.h"
  39
  40 void Fl_Light_Button::draw() {
  41   if (box()) draw_box(this==Fl::pushed() ? fl_down(box()) : box(), color());
  42   Fl_Color col = value() ? (active_r() ? selection_color() :
  43                             fl_inactive(selection_color())) : color();
  44   int W;
  45   int dx, dy;
  46
  47   W  = labelsize();
  48   dx = Fl::box_dx(box()) + 2;
  49   dy = (h() - W) / 2;
  50   // if (dy < 0) dy = 0;         // neg. offset o.k. for vertical centering
  51
  52   if (down_box()) {
  53     // draw other down_box() styles:
  54     switch (down_box()) {
  55       case FL_DOWN_BOX :
  56       case FL_UP_BOX :
  57         // Check box...
  58         draw_box(down_box(), x()+dx, y()+dy, W, W, FL_BACKGROUND2_COLOR);
  59         if (value()) {
  60           if (Fl::scheme() && !strcmp(Fl::scheme(), "gtk+")) {
  61             fl_color(FL_SELECTION_COLOR);
  62           } else {
  63             fl_color(col);
  64           }
  65           int tx = x() + dx + 3;
  66           int tw = W - 6;
  67           int d1 = tw/3;
  68           int d2 = tw-d1;
  69           int ty = y() + dy + (W+d2)/2-d1-2;
  70           for (int n = 0; n < 3; n++, ty++) {
  71             fl_line(tx, ty, tx+d1, ty+d1);
  72             fl_line(tx+d1, ty+d1, tx+tw-1, ty+d1-d2+1);
  73           }
  74         }
  75         break;
  76       case _FL_ROUND_DOWN_BOX :
  77       case _FL_ROUND_UP_BOX :
  78         // Radio button...
  79         draw_box(down_box(), x()+dx, y()+dy, W, W, FL_BACKGROUND2_COLOR);
  80         if (value()) {
  81           int tW = (W - Fl::box_dw(down_box())) / 2 + 1;
  82           if ((W - tW) & 1) tW++; // Make sure difference is even to center
  83           int tdx = dx + (W - tW) / 2;
  84           int tdy = dy + (W - tW) / 2;
  85
  86           if (Fl::scheme() && !strcmp(Fl::scheme(), "gtk+")) {
  87             fl_color(FL_SELECTION_COLOR);
  88             tW --;
  89             fl_pie(x() + tdx - 1, y() + tdy - 1, tW + 3, tW + 3, 0.0, 360.0);
  90             fl_arc(x() + tdx - 1, y() + tdy - 1, tW + 3, tW + 3, 0.0, 360.0);
  91             fl_color(fl_color_average(FL_WHITE, FL_SELECTION_COLOR, 0.2f));
  92           } else fl_color(col);
  93
  94           switch (tW) {
  95             // Larger circles draw fine...
  96             default :
  97               fl_pie(x() + tdx, y() + tdy, tW, tW, 0.0, 360.0);
  98               break;
  99
 100             // Small circles don't draw well on many systems...
 101             case 6 :
 102               fl_rectf(x() + tdx + 2, y() + tdy, tW - 4, tW);
 103               fl_rectf(x() + tdx + 1, y() + tdy + 1, tW - 2, tW - 2);
 104               fl_rectf(x() + tdx, y() + tdy + 2, tW, tW - 4);
 105               break;
 106
 107             case 5 :
 108             case 4 :
 109             case 3 :
 110               fl_rectf(x() + tdx + 1, y() + tdy, tW - 2, tW);
 111               fl_rectf(x() + tdx, y() + tdy + 1, tW, tW - 2);
 112               break;
 113
 114             case 2 :
 115             case 1 :
 116               fl_rectf(x() + tdx, y() + tdy, tW, tW);
 117               break;
 118           }
 119
 120           if (Fl::scheme() && !strcmp(Fl::scheme(), "gtk+")) {
 121             fl_color(fl_color_average(FL_WHITE, FL_SELECTION_COLOR, 0.5));
 122             fl_arc(x() + tdx, y() + tdy, tW + 1, tW + 1, 60.0, 180.0);
 123           }
 124         }
 125         break;
 126       default :
 127         draw_box(down_box(), x()+dx, y()+dy, W, W, col);
 128         break;
 129     }
 130   } else {
 131     // if down_box() is zero, draw light button style:
 132     int hh = h()-2*dy - 2;
 133     int ww = W/2+1;
 134     int xx = dx;
 135     if (w()<ww+2*xx) xx = (w()-ww)/2;
 136     /* if (Fl::scheme() && !strcmp(Fl::scheme(), "plastic")) { */
 137     /*   col = active_r() ? selection_color() : fl_inactive(selection_color()); */
 138     /*   fl_color(value() ? col : fl_color_average(col, FL_BLACK, 0.5f)); */
 139     /*   fl_pie(x()+xx, y()+dy+1, ww, hh, 0, 360); */
 140     /* } else { */
 141       draw_box(FL_THIN_DOWN_BOX, x()+xx, y()+dy+1, ww, hh, col);
 142     /* } */
 143     dx = (ww + 2 * dx - W) / 2;
 144   }
 145   draw_label(x()+W+2*dx, y(), w()-W-2*dx, h());
 146   if (Fl::focus() == this) draw_focus();
 147 }
 148
 149 int Fl_Light_Button::handle(int event) {
 150   switch (event) {
 151   case FL_RELEASE:
 152     if (box()) redraw();
 153   default:
 154     return Fl_Button::handle(event);
 155   }
 156 }
 157
 158 /**
 159   Creates a new Fl_Light_Button widget using the given
 160   position, size, and label string.
 161   <P>The destructor deletes the check button.
 162 */
 163 Fl_Light_Button::Fl_Light_Button(int X, int Y, int W, int H, const char* l)
 164 : Fl_Button(X, Y, W, H, l) {
 165   type(FL_TOGGLE_BUTTON);
 166   selection_color(FL_YELLOW);
 167   align(FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
 168 }
 169
 170 //
 171 // End of "$Id: Fl_Light_Button.cxx 7903 2010-11-28 21:06:39Z matt $".
 172 //