src/Fl_Choice.cxx

   1 //
   2 // "$Id: Fl_Choice.cxx 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Choice 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 #include <FL/Fl.H>
  29 #include <FL/Fl_Choice.H>
  30 #include <FL/fl_draw.H>
  31 #include "flstring.h"
  32
  33 // Emulates the Forms choice widget.  This is almost exactly the same
  34 // as an Fl_Menu_Button.  The only difference is the appearance of the
  35 // button: it draws the text of the current pick and a down-arrow.
  36
  37 void Fl_Choice::draw() {
  38     int dx = Fl::box_dx(down_box());
  39     int dy = Fl::box_dy(down_box());
  40   int H = h() - 2 * dy;
  41   int W = (H > 20) ? 20 : H;
  42   int X = x() + w() - W - dx;
  43   int Y = y() + dy;
  44   int w1 = (W - 4) / 3; if (w1 < 1) w1 = 1;
  45   int x1 = X + (W - 2 * w1 - 1) / 2;
  46   int y1 = Y + (H - w1 - 1) / 2;
  47
  48   /* if (Fl::scheme()) { */
  49   draw_box(box(), color());
  50
  51   fl_color(active_r() ? labelcolor() : fl_inactive(labelcolor()));
  52       // Show larger up/down arrows...
  53   fl_polygon(x1, y1 + 3, x1 + w1, y1 + w1 + 3, x1 + 2 * w1, y1 + 3);
  54   fl_polygon(x1, y1 + 1, x1 + w1, y1 - w1 + 1, x1 + 2 * w1, y1 + 1);
  55
  56   W += 2 * dx;
  57
  58   if (mvalue()) {
  59     Fl_Menu_Item m = *mvalue();
  60     if (active_r()) m.activate(); else m.deactivate();
  61
  62     // ERCO
  63     int xx = x() + dx, yy = y() + dy + 1, ww = w() - W, hh = H - 2;
  64
  65     fl_push_clip(xx, yy, ww, hh);
  66
  67     if ( Fl::scheme()) {
  68       Fl_Label l;
  69       l.value = m.text;
  70       l.image = 0;
  71       l.deimage = 0;
  72       l.type = m.labeltype_;
  73       l.font = m.labelsize_ || m.labelfont_ ? m.labelfont_ : textfont();
  74       l.size = m.labelsize_ ? m.labelsize_ : textsize();
  75       l.color= m.labelcolor_ ? m.labelcolor_ : textcolor();
  76       if (!m.active()) l.color = fl_inactive((Fl_Color)l.color);
  77       fl_draw_shortcut = 2; // hack value to make '&' disappear
  78       l.draw(xx+3, yy, ww>6 ? ww-6 : 0, hh, FL_ALIGN_LEFT);
  79       fl_draw_shortcut = 0;
  80       if ( Fl::focus() == this ) draw_focus(box(), xx, yy, ww, hh);
  81     }
  82     else {
  83       fl_draw_shortcut = 2; // hack value to make '&' disappear
  84       m.draw(xx, yy, ww, hh, this, Fl::focus() == this);
  85       fl_draw_shortcut = 0;
  86     }
  87
  88     fl_pop_clip();
  89   }
  90
  91   draw_label();
  92 }
  93
  94 /**
  95   Create a new Fl_Choice widget using the given position, size and label string.
  96   The default boxtype is \c FL_UP_BOX.
  97
  98   The constructor sets menu() to NULL.
  99   See Fl_Menu_ for the methods to set or change the menu.
 100
 101   \param[in] X, Y, W, H position and size of the widget
 102   \param[in] L widget label, default is no label
 103  */
 104 Fl_Choice::Fl_Choice(int X, int Y, int W, int H, const char *L)
 105 : Fl_Menu_(X,Y,W,H,L) {
 106   align(FL_ALIGN_LEFT);
 107   when(FL_WHEN_RELEASE);
 108   textfont(FL_HELVETICA);
 109   box(FL_UP_BOX);
 110   down_box(FL_BORDER_BOX);
 111   color(FL_BACKGROUND_COLOR);
 112 }
 113
 114 /**
 115   Sets the currently selected value using a pointer to menu item.
 116   Changing the selected value causes a redraw().
 117   \param[in] v pointer to menu item in the menu item array.
 118   \returns non-zero if the new value is different to the old one.
 119  */
 120 int Fl_Choice::value(const Fl_Menu_Item *v) {
 121   if (!Fl_Menu_::value(v)) return 0;
 122   redraw();
 123   return 1;
 124 }
 125
 126 /**
 127   Sets the currently selected value using the index into the menu item array.
 128   Changing the selected value causes a redraw().
 129   \param[in] v index of value in the menu item array.
 130   \returns non-zero if the new value is different to the old one.
 131  */
 132 int Fl_Choice::value(int v) {
 133   if (v == -1) return value((const Fl_Menu_Item *)0);
 134   if (v < 0 || v >= (size() - 1)) return 0;
 135   if (!Fl_Menu_::value(v)) return 0;
 136   redraw();
 137   return 1;
 138 }
 139
 140 int Fl_Choice::handle(int e) {
 141   if (!menu() || !menu()->text) return 0;
 142   const Fl_Menu_Item* v;
 143   switch (e) {
 144   case FL_ENTER:
 145   case FL_LEAVE:
 146     return 1;
 147
 148   case FL_KEYBOARD:
 149     if (Fl::event_key() != ' ' ||
 150         (Fl::event_state() & (FL_SHIFT | FL_CTRL | FL_ALT | FL_META))) return 0;
 151   case FL_PUSH:
 152     if (Fl::visible_focus()) Fl::focus(this);
 153   J1:
 154     v = menu()->pulldown(x(), y(), w(), h(), mvalue(), this);
 155     if (!v || v->submenu()) return 1;
 156     if (v != mvalue()) redraw();
 157     picked(v);
 158     return 1;
 159   case FL_SHORTCUT:
 160     if (Fl_Widget::test_shortcut()) goto J1;
 161     v = menu()->test_shortcut();
 162     if (!v) return 0;
 163     if (v != mvalue()) redraw();
 164     picked(v);
 165     return 1;
 166   case FL_FOCUS:
 167   case FL_UNFOCUS:
 168     if (Fl::visible_focus()) {
 169       redraw();
 170       return 1;
 171     } else return 0;
 172   default:
 173     return 0;
 174   }
 175 }
 176
 177 //
 178 // End of "$Id: Fl_Choice.cxx 7903 2010-11-28 21:06:39Z matt $".
 179 //