source/entry.cpp

   1 #include <msp/gl/matrix.h>
   2 #include <msp/gl/texture.h>
   3 #include <msp/gl/transform.h>
   4 #include <msp/input/keys.h>
   5 #include "entry.h"
   6 #include "graphic.h"
   7 #include "part.h"
   8 #include "style.h"
   9 #include "vslider.h"
  10
  11 using namespace std;
  12
  13 namespace Msp {
  14 namespace GLtk {
  15
  16 Entry::Entry(const string &t):
  17         text(),
  18         multiline(false),
  19         edit_pos(0),
  20         first_row(0),
  21         visible_rows(1),
  22         text_part(0),
  23         slider(0)
  24 {
  25         set_text(t);
  26 }
  27
  28 void Entry::autosize()
  29 {
  30         if(!style)
  31                 return;
  32
  33         Widget::autosize();
  34
  35         if(text_part)
  36         {
  37                 const Sides &margin = text_part->get_margin();
  38                 const GL::Font &font = *style->get_font();
  39                 unsigned en_width = static_cast<unsigned>(font.get_string_width("n")*font.get_native_size());
  40                 geom.w = max(geom.w, 10*en_width+margin.left+margin.right);
  41
  42                 unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*font.get_native_size());
  43                 if(multiline)
  44                 {
  45                         unsigned line_spacing = font.get_native_size()*6/5;
  46                         geom.h = max(geom.h, line_height+line_spacing*2+margin.top+margin.bottom);
  47                 }
  48                 else
  49                         geom.h = max(geom.h, line_height+margin.top+margin.bottom);
  50         }
  51
  52         if(multiline)
  53         {
  54                 if(const Part *slider_part = style->get_part("slider"))
  55                 {
  56                         Geometry sgeom = slider_part->get_geometry();
  57                         if(!sgeom.w || !sgeom.h)
  58                         {
  59                                 slider->autosize();
  60                                 if(!sgeom.w)
  61                                         sgeom.w = slider->get_geometry().w;
  62                                 if(!sgeom.h)
  63                                         sgeom.h = slider->get_geometry().h;
  64                         }
  65
  66                         const Sides &margin = slider_part->get_margin();
  67                         geom.w = max(geom.w, sgeom.w+margin.left+margin.right);
  68                         geom.h = max(geom.h, sgeom.h+margin.top+margin.bottom);
  69
  70                         reposition_slider();
  71                 }
  72
  73                 check_view_range();
  74         }
  75 }
  76
  77 void Entry::set_text(const string &t)
  78 {
  79         text = t;
  80         edit_pos = text.size();
  81
  82         if(multiline)
  83                 check_view_range();
  84 }
  85
  86 void Entry::set_multiline(bool m)
  87 {
  88         multiline = m;
  89         if(multiline)
  90         {
  91                 if(!slider)
  92                 {
  93                         slider = new VSlider;
  94                         add(*slider);
  95                         slider->set_step(1);
  96                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
  97                         reposition_slider();
  98                 }
  99                 check_view_range();
 100         }
 101 }
 102
 103 void Entry::render_special(const Part &part) const
 104 {
 105         if(part.get_name()=="text")
 106                 text.render(part, geom, first_row);
 107         else if(part.get_name()=="cursor")
 108         {
 109                 if(!text_part || !part.get_graphic(state))
 110                         return;
 111
 112                 unsigned row, col;
 113                 text.offset_to_coords(edit_pos, row, col);
 114
 115                 if(row<first_row || row>=first_row+visible_rows)
 116                         return;
 117
 118                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 119
 120                 GL::push_matrix();
 121                 GL::translate(rgeom.x, rgeom.y, 0);
 122                 part.get_graphic(state)->render(part.get_geometry().w, part.get_geometry().h);
 123                 GL::pop_matrix();
 124         }
 125         else if(part.get_name()=="slider" && multiline)
 126                 slider->render();
 127 }
 128
 129 void Entry::key_press(unsigned key, unsigned, wchar_t ch)
 130 {
 131         if(key==Input::KEY_LEFT)
 132         {
 133                 if(edit_pos>0)
 134                 {
 135                         --edit_pos;
 136                         check_view_range();
 137                 }
 138         }
 139         else if(key==Input::KEY_RIGHT)
 140         {
 141                 if(edit_pos<text.size())
 142                 {
 143                         ++edit_pos;
 144                         check_view_range();
 145                 }
 146         }
 147         else if(key==Input::KEY_DOWN && multiline)
 148         {
 149                 unsigned row, col;
 150                 text.offset_to_coords(edit_pos, row, col);
 151                 edit_pos = text.coords_to_offset(row+1, col);
 152                 check_view_range();
 153         }
 154         else if(key==Input::KEY_UP && multiline)
 155         {
 156                 unsigned row, col;
 157                 text.offset_to_coords(edit_pos, row, col);
 158                 if(row>0)
 159                 {
 160                         edit_pos = text.coords_to_offset(row-1, col);
 161                         check_view_range();
 162                 }
 163                 else
 164                         edit_pos = 0;
 165         }
 166         else if(key==Input::KEY_BACKSPACE)
 167         {
 168                 if(edit_pos>0)
 169                 {
 170                         text.erase(--edit_pos, 1);
 171                         check_view_range();
 172                 }
 173         }
 174         else if(key==Input::KEY_ENTER)
 175         {
 176                 if(multiline)
 177                 {
 178                         text.insert(edit_pos++, "\n");
 179                         check_view_range();
 180                 }
 181                 else
 182                         signal_enter.emit();
 183         }
 184         else if(ch>=' ')
 185         {
 186                 text.insert(edit_pos, Codecs::encode<Codecs::Utf8>(Codecs::ustring(1, ch)));
 187                 ++edit_pos;
 188         }
 189 }
 190
 191 void Entry::on_geometry_change()
 192 {
 193         reposition_slider();
 194
 195         if(multiline)
 196                 check_view_range();
 197 }
 198
 199 void Entry::on_style_change()
 200 {
 201         text.set_style(style);
 202
 203         if(!style)
 204         {
 205                 text_part = 0;
 206                 return;
 207         }
 208
 209         text_part = style->get_part("text");
 210
 211         reposition_slider();
 212
 213         if(multiline)
 214                 check_view_range();
 215 }
 216
 217 void Entry::reposition_slider()
 218 {
 219         if(!style || !slider)
 220                 return;
 221
 222         if(const Part *slider_part = style->get_part("slider"))
 223         {
 224                 Geometry sgeom = slider_part->get_geometry();
 225                 if(!sgeom.w || !sgeom.h)
 226                 {
 227                         slider->autosize();
 228                         if(!sgeom.w)
 229                                 sgeom.w = slider->get_geometry().w;
 230                         if(!sgeom.h)
 231                                 sgeom.h = slider->get_geometry().h;
 232                 }
 233
 234                 slider_part->get_alignment().apply(sgeom, geom, slider_part->get_margin());
 235                 slider->set_geometry(sgeom);
 236         }
 237 }
 238
 239 void Entry::check_view_range()
 240 {
 241         if(!multiline || !text_part)
 242                 return;
 243
 244         const GL::Font *font = style->get_font();
 245         float font_size = font->get_default_size();
 246         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 247
 248         const Sides &margin = text_part->get_margin();
 249         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 250
 251         unsigned row, col;
 252         text.offset_to_coords(edit_pos, row, col);
 253
 254         if(first_row>row)
 255                 first_row = row;
 256         else if(row>=first_row+visible_rows)
 257                 first_row = row+1-visible_rows;
 258
 259         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 260         slider->set_range(0, scroll);
 261         slider->set_value(scroll-first_row);
 262 }
 263
 264 void Entry::slider_value_changed(double value)
 265 {
 266         if(text.get_n_lines()>visible_rows)
 267                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 268 }
 269
 270
 271 Entry::Loader::Loader(Entry &ent):
 272         Widget::Loader(ent)
 273 { }
 274
 275 } // namespace GLtk
 276 } // namespace Msp