FLTK 1.3.0
Fl_Input_Choice.H
00001 //
00002 // "$Id: Fl_Input_Choice.H 8022 2010-12-12 23:21:03Z AlbrechtS $"
00003 //
00004 // An input/chooser widget.
00005 //            ______________  ____
00006 //           |              || __ |
00007 //           | input area   || \/ |
00008 //           |______________||____|
00009 //
00010 // Copyright 1998-2010 by Bill Spitzak and others.
00011 // Copyright 2004 by Greg Ercolano.
00012 //
00013 // This library is free software; you can redistribute it and/or
00014 // modify it under the terms of the GNU Library General Public
00015 // License as published by the Free Software Foundation; either
00016 // version 2 of the License, or (at your option) any later version.
00017 //
00018 // This library is distributed in the hope that it will be useful,
00019 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00020 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00021 // Library General Public License for more details.
00022 //
00023 // You should have received a copy of the GNU Library General Public
00024 // License along with this library; if not, write to the Free Software
00025 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00026 // USA.
00027 //
00028 // Please report all bugs and problems on the following page:
00029 //
00030 //     http://www.fltk.org/str.php
00031 //
00032 
00033 /* \file
00034    Fl_Input_Choice widget . */
00035 
00036 
00037 
00038 #ifndef Fl_Input_Choice_H
00039 #define Fl_Input_Choice_H
00040 
00041 #include <FL/Fl.H>
00042 #include <FL/Fl_Group.H>
00043 #include <FL/Fl_Input.H>
00044 #include <FL/Fl_Menu_Button.H>
00045 #include <FL/fl_draw.H>
00046 #include <string.h>
00047 
00059 class FL_EXPORT Fl_Input_Choice : public Fl_Group {
00060   // Private class to handle slightly 'special' behavior of menu button
00061   class InputMenuButton : public Fl_Menu_Button {
00062     void draw() {
00063       draw_box(FL_UP_BOX, color());
00064       fl_color(active_r() ? labelcolor() : fl_inactive(labelcolor()));
00065       int xc = x()+w()/2, yc=y()+h()/2;
00066       fl_polygon(xc-5,yc-3,xc+5,yc-3,xc,yc+3);
00067       if (Fl::focus() == this) draw_focus();
00068     }
00069   public:
00070     InputMenuButton(int x,int y,int w,int h,const char*l=0) : 
00071         Fl_Menu_Button(x,y,w,h,l) { box(FL_UP_BOX); }
00072   };
00073 
00074   Fl_Input *inp_;
00075   InputMenuButton *menu_;
00076 
00077   static void menu_cb(Fl_Widget*, void *data) { 
00078     Fl_Input_Choice *o=(Fl_Input_Choice *)data;
00079     Fl_Widget_Tracker wp(o);
00080     const Fl_Menu_Item *item = o->menubutton()->mvalue();
00081     if (item && item->flags & (FL_SUBMENU|FL_SUBMENU_POINTER)) return;  // ignore submenus
00082     if (!strcmp(o->inp_->value(), o->menu_->text()))
00083     {
00084       o->Fl_Widget::clear_changed();
00085       if (o->when() & FL_WHEN_NOT_CHANGED)
00086         o->do_callback();
00087     }
00088     else
00089     {
00090       o->inp_->value(o->menu_->text());
00091       o->inp_->set_changed();
00092       o->Fl_Widget::set_changed();
00093       if (o->when() & (FL_WHEN_CHANGED|FL_WHEN_RELEASE))
00094         o->do_callback();
00095     }
00096     
00097     if (wp.deleted()) return;
00098 
00099     if (o->callback() != default_callback)
00100     {
00101       o->Fl_Widget::clear_changed();
00102       o->inp_->clear_changed();
00103     }
00104   }
00105 
00106   static void inp_cb(Fl_Widget*, void *data) { 
00107     Fl_Input_Choice *o=(Fl_Input_Choice *)data;
00108     Fl_Widget_Tracker wp(o);
00109     if (o->inp_->changed()) {
00110       o->Fl_Widget::set_changed();
00111       if (o->when() & (FL_WHEN_CHANGED|FL_WHEN_RELEASE))
00112         o->do_callback();
00113     } else {
00114       o->Fl_Widget::clear_changed();
00115       if (o->when() & FL_WHEN_NOT_CHANGED)
00116         o->do_callback();
00117     }
00118     
00119     if (wp.deleted()) return;
00120 
00121     if (o->callback() != default_callback)
00122       o->Fl_Widget::clear_changed();
00123   }
00124 
00125   // Custom resize behavior -- input stretches, menu button doesn't
00126   inline int inp_x() { return(x() + Fl::box_dx(box())); }
00127   inline int inp_y() { return(y() + Fl::box_dy(box())); }
00128   inline int inp_w() { return(w() - Fl::box_dw(box()) - 20); }
00129   inline int inp_h() { return(h() - Fl::box_dh(box())); }
00130 
00131   inline int menu_x() { return(x() + w() - 20 - Fl::box_dx(box())); }
00132   inline int menu_y() { return(y() + Fl::box_dy(box())); }
00133   inline int menu_w() { return(20); }
00134   inline int menu_h() { return(h() - Fl::box_dh(box())); }
00135 
00136 public:
00142   Fl_Input_Choice (int x,int y,int w,int h,const char*l=0) : Fl_Group(x,y,w,h,l) {
00143     Fl_Group::box(FL_DOWN_BOX);
00144     align(FL_ALIGN_LEFT);                               // default like Fl_Input
00145     inp_ = new Fl_Input(inp_x(), inp_y(),
00146                         inp_w(), inp_h());
00147     inp_->callback(inp_cb, (void*)this);
00148     inp_->box(FL_FLAT_BOX);             // cosmetic
00149     inp_->when(FL_WHEN_CHANGED|FL_WHEN_NOT_CHANGED);
00150     menu_ = new InputMenuButton(menu_x(), menu_y(),
00151                                 menu_w(), menu_h());
00152     menu_->callback(menu_cb, (void*)this);
00153     menu_->box(FL_FLAT_BOX);                            // cosmetic
00154     end();
00155   }
00156   
00158   void add(const char *s) { menu_->add(s);  }
00159   int changed() const { return inp_->changed() | Fl_Widget::changed();}
00160   void clear_changed() { 
00161     inp_->clear_changed();
00162     Fl_Widget::clear_changed();
00163   }
00164   void set_changed() { 
00165     inp_->set_changed();
00166     // no need to call Fl_Widget::set_changed()
00167   }
00169   void clear() { menu_->clear(); }
00171   Fl_Boxtype down_box() const { return (menu_->down_box()); }
00173   void down_box(Fl_Boxtype b) { menu_->down_box(b); }
00175   const Fl_Menu_Item *menu() { return (menu_->menu()); }
00177   void menu(const Fl_Menu_Item *m) { menu_->menu(m); }
00178   void resize(int X, int Y, int W, int H) {
00179     Fl_Group::resize(X,Y,W,H);
00180     inp_->resize(inp_x(), inp_y(), inp_w(), inp_h());
00181     menu_->resize(menu_x(), menu_y(), menu_w(), menu_h());
00182   }
00184   Fl_Color textcolor() const { return (inp_->textcolor());}
00186   void textcolor(Fl_Color c) { inp_->textcolor(c);}
00188   Fl_Font textfont() const { return (inp_->textfont());}
00190   void textfont(Fl_Font f) { inp_->textfont(f);}
00192   Fl_Fontsize textsize() const { return (inp_->textsize()); }
00194   void textsize(Fl_Fontsize s) { inp_->textsize(s); }
00196   const char* value() const { return (inp_->value()); }
00204   void value(const char *val) { inp_->value(val); }
00206   void value(int val) {
00207     menu_->value(val);
00208     inp_->value(menu_->text(val));
00209   }
00211   Fl_Menu_Button *menubutton() { return menu_; }
00215   Fl_Input *input() { return inp_; }
00216 };
00217 
00218 #endif // !Fl_Input_Choice_H
00219 
00220 //
00221 // End of "$Id: Fl_Input_Choice.H 8022 2010-12-12 23:21:03Z AlbrechtS $".
00222 //