source/dropdown.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgltk
   4 Copyright © 2007-2009  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <msp/gl/font.h>
   9 #include "dropdown.h"
  10 #include "list.h"
  11 #include "panel.h"
  12 #include "part.h"
  13 #include "style.h"
  14 #include "text.h"
  15
  16 using namespace std;
  17
  18 namespace Msp {
  19 namespace GLtk {
  20
  21 Dropdown::Dropdown(const Resources &r):
  22         Widget(r),
  23         Container(r),
  24         list(r),
  25         dropped(false)
  26 {
  27         add(list);
  28         list.signal_item_selected.connect(sigc::mem_fun(this, &Dropdown::list_item_selected));
  29
  30         update_style();
  31 }
  32
  33 void Dropdown::append(const string &item)
  34 {
  35         list.append(item);
  36         resize_list();
  37 }
  38
  39 void Dropdown::insert(unsigned i, const string &v)
  40 {
  41         list.insert(i, v);
  42         resize_list();
  43 }
  44
  45 void Dropdown::remove(unsigned i)
  46 {
  47         list.remove(i);
  48         resize_list();
  49 }
  50
  51 void Dropdown::clear()
  52 {
  53         list.clear();
  54         resize_list();
  55 }
  56
  57 unsigned Dropdown::get_n_items() const
  58 {
  59         return list.get_n_items();
  60 }
  61
  62 void Dropdown::set_selected_index(int i)
  63 {
  64         list.set_selected_index(i);
  65 }
  66
  67 const string &Dropdown::get_selected() const
  68 {
  69         return list.get_selected();
  70 }
  71
  72 int Dropdown::get_selected_index() const
  73 {
  74         return list.get_selected_index();
  75 }
  76
  77 void Dropdown::button_press(int x, int y, unsigned btn)
  78 {
  79         if(dropped)
  80         {
  81                 Container::button_press(x, y, btn);
  82                 if(!click_focus)
  83                 {
  84                         dropped=false;
  85                         state&=~ACTIVE;
  86                         signal_ungrab_pointer.emit();
  87                 }
  88         }
  89         else if(btn==1)
  90         {
  91                 dropped=true;
  92                 state|=ACTIVE;
  93                 signal_grab_pointer.emit();
  94         }
  95 }
  96
  97 void Dropdown::render_special(const Part &part) const
  98 {
  99         if(part.get_name()=="text")
 100         {
 101                 if(list.get_selected_index()>=0)
 102                         Text(style, list.get_selected()).render(part, geom);
 103                         //render_text(part, list.get_selected());
 104         }
 105         else if(part.get_name()=="list" && dropped)
 106                 list.render();
 107 }
 108
 109 void Dropdown::on_geometry_change()
 110 {
 111         resize_list();
 112 }
 113
 114 void Dropdown::resize_list()
 115 {
 116         // XXX This is a hack.
 117         unsigned n_items=list.get_n_items();
 118         const Style &stl=list.get_style();
 119         const GL::Font &font=*stl.get_font();
 120         unsigned h=min(max(n_items, 1U), 10U)*static_cast<unsigned>((font.get_ascent()-font.get_descent())*font.get_default_size());
 121         for(std::list<Part>::const_iterator i=stl.get_parts().begin(); i!=stl.get_parts().end(); ++i)
 122                 if(i->get_name()=="items")
 123                 {
 124                         const Sides &margin=i->get_margin();
 125                         h+=margin.top+margin.bottom;
 126                 }
 127         list.set_geometry(Geometry(0, -h, geom.w, h));
 128 }
 129
 130 void Dropdown::list_item_selected(unsigned index, const std::string &item)
 131 {
 132         if(dropped)
 133         {
 134                 dropped=false;
 135                 state&=~ACTIVE;
 136                 signal_ungrab_pointer.emit();
 137         }
 138
 139         signal_item_selected.emit(index, item);
 140 }
 141
 142
 143 Dropdown::Loader::Loader(Dropdown &d):
 144         Widget::Loader(d)
 145 {
 146         add("item", &Loader::item);
 147 }
 148
 149 void Dropdown::Loader::item(const string &str)
 150 {
 151         dynamic_cast<Dropdown &>(wdg).append(str);
 152 }
 153
 154 } // namespace GLtk
 155 } // namespace Msp