source/entry.cpp

   1 #include <msp/gl/matrix.h>
   2 #include <msp/gl/meshbuilder.h>
   3 #include <msp/gl/texture.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")*style->get_font_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())*style->get_font_size());
  43                 if(multiline)
  44                 {
  45                         unsigned line_spacing = style->get_font_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         rebuild();
  77 }
  78
  79 void Entry::set_text(const string &t)
  80 {
  81         text = t;
  82         edit_pos = text.size();
  83
  84         if(multiline)
  85                 check_view_range();
  86
  87         rebuild();
  88 }
  89
  90 void Entry::set_multiline(bool m)
  91 {
  92         multiline = m;
  93         if(multiline)
  94         {
  95                 if(!slider)
  96                 {
  97                         slider = new VSlider;
  98                         add(*slider);
  99                         slider->set_step(1);
 100                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
 101                         reposition_slider();
 102                 }
 103                 check_view_range();
 104         }
 105 }
 106
 107 void Entry::rebuild_special(const Part &part, CachedPart &cache)
 108 {
 109         if(part.get_name()=="text")
 110                 text.build(part, geom, first_row, cache);
 111         else if(part.get_name()=="cursor")
 112         {
 113                 if(!text_part || !part.get_graphic(state))
 114                 {
 115                         cache.texture = 0;
 116                         return;
 117                 }
 118
 119                 unsigned row, col;
 120                 text.offset_to_coords(edit_pos, row, col);
 121
 122                 if(row<first_row || row>=first_row+visible_rows)
 123                 {
 124                         cache.texture = 0;
 125                         return;
 126                 }
 127
 128                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 129
 130                 cache.texture = part.get_graphic(state)->get_texture();
 131                 cache.clear_mesh();
 132
 133                 GL::MeshBuilder bld(*cache.mesh);
 134                 bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 135                 part.get_graphic(state)->build(part.get_geometry().w, part.get_geometry().h, bld);
 136         }
 137 }
 138
 139 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 140 {
 141         if(part.get_name()=="slider" && multiline)
 142                 slider->render(renderer);
 143 }
 144
 145 void Entry::key_press(unsigned key, unsigned)
 146 {
 147         if(key==Input::KEY_LEFT)
 148         {
 149                 if(edit_pos>0)
 150                         set_edit_position(edit_pos-1);
 151         }
 152         else if(key==Input::KEY_RIGHT)
 153         {
 154                 if(edit_pos<text.size())
 155                         set_edit_position(edit_pos+1);
 156         }
 157         else if(key==Input::KEY_DOWN && multiline)
 158         {
 159                 unsigned row, col;
 160                 text.offset_to_coords(edit_pos, row, col);
 161                 set_edit_position(text.coords_to_offset(row+1, col));
 162         }
 163         else if(key==Input::KEY_UP && multiline)
 164         {
 165                 unsigned row, col;
 166                 text.offset_to_coords(edit_pos, row, col);
 167                 set_edit_position(row>0 ? text.coords_to_offset(row-1, col) : 0);
 168         }
 169         else if(key==Input::KEY_BACKSPACE)
 170         {
 171                 if(edit_pos>0)
 172                 {
 173                         text.erase(--edit_pos, 1);
 174                         check_view_range();
 175                         rebuild();
 176                 }
 177         }
 178         else if(key==Input::KEY_ENTER)
 179         {
 180                 if(multiline)
 181                 {
 182                         text.insert(edit_pos++, "\n");
 183                         check_view_range();
 184                         rebuild();
 185                 }
 186                 else
 187                         signal_enter.emit();
 188         }
 189 }
 190
 191 void Entry::character(wchar_t ch)
 192 {
 193         if(ch>=' ')
 194         {
 195                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 196                 ++edit_pos;
 197                 rebuild();
 198         }
 199 }
 200
 201 void Entry::on_geometry_change()
 202 {
 203         reposition_slider();
 204
 205         if(multiline)
 206                 check_view_range();
 207 }
 208
 209 void Entry::on_style_change()
 210 {
 211         text.set_style(style);
 212
 213         if(!style)
 214         {
 215                 text_part = 0;
 216                 return;
 217         }
 218
 219         text_part = style->get_part("text");
 220
 221         reposition_slider();
 222
 223         if(multiline)
 224                 check_view_range();
 225 }
 226
 227 void Entry::set_edit_position(unsigned ep)
 228 {
 229         edit_pos = ep;
 230         check_view_range();
 231         rebuild();
 232 }
 233
 234 void Entry::reposition_slider()
 235 {
 236         if(!style || !slider)
 237                 return;
 238
 239         if(const Part *slider_part = style->get_part("slider"))
 240         {
 241                 Geometry sgeom = slider_part->get_geometry();
 242                 if(!sgeom.w || !sgeom.h)
 243                 {
 244                         slider->autosize();
 245                         if(!sgeom.w)
 246                                 sgeom.w = slider->get_geometry().w;
 247                         if(!sgeom.h)
 248                                 sgeom.h = slider->get_geometry().h;
 249                 }
 250
 251                 slider_part->get_alignment().apply(sgeom, geom, slider_part->get_margin());
 252                 slider->set_geometry(sgeom);
 253         }
 254 }
 255
 256 void Entry::check_view_range()
 257 {
 258         if(!multiline || !text_part)
 259                 return;
 260
 261         float font_size = style->get_font_size();
 262         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 263
 264         const Sides &margin = text_part->get_margin();
 265         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 266
 267         unsigned row, col;
 268         text.offset_to_coords(edit_pos, row, col);
 269
 270         if(first_row>row)
 271                 first_row = row;
 272         else if(row>=first_row+visible_rows)
 273                 first_row = row+1-visible_rows;
 274
 275         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 276         slider->set_range(0, scroll);
 277         slider->set_value(scroll-first_row);
 278 }
 279
 280 void Entry::slider_value_changed(double value)
 281 {
 282         if(text.get_n_lines()>visible_rows)
 283                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 284 }
 285
 286
 287 Entry::Loader::Loader(Entry &ent):
 288         Widget::Loader(ent)
 289 { }
 290
 291 } // namespace GLtk
 292 } // namespace Msp