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_width(10),
  20         edit_height(1),
  21         edit_pos(0),
  22         first_row(0),
  23         visible_rows(1),
  24         text_part(0),
  25         slider(0),
  26         got_key_press(false)
  27 {
  28         set_text(t);
  29 }
  30
  31 void Entry::autosize_special(const Part &part, Geometry &ageom) const
  32 {
  33         if(part.get_name()=="text")
  34         {
  35                 const Sides &margin = part.get_margin();
  36                 const GL::Font &font = style->get_font();
  37                 unsigned en_width = static_cast<unsigned>(font.get_string_width("n")*style->get_font_size());
  38                 ageom.w = max(ageom.w, edit_width*en_width+margin.left+margin.right);
  39
  40                 unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*style->get_font_size());
  41                 if(multiline)
  42                 {
  43                         unsigned line_spacing = style->get_font_size()*6/5;
  44                         ageom.h = max(ageom.h, line_height+line_spacing*(edit_height-1)+margin.top+margin.bottom);
  45                 }
  46                 else
  47                         ageom.h = max(ageom.h, line_height+margin.top+margin.bottom);
  48         }
  49         else if(part.get_name()=="slider" && multiline)
  50         {
  51                 Geometry sgeom = part.get_geometry();
  52                 if(!sgeom.w || !sgeom.h)
  53                 {
  54                         Geometry wgeom;
  55                         slider->autosize(wgeom);
  56                         if(!sgeom.w)
  57                                 sgeom.w = wgeom.w;
  58                         if(!sgeom.h)
  59                                 sgeom.h = wgeom.h;
  60                 }
  61
  62                 const Sides &margin = part.get_margin();
  63                 ageom.w = max(ageom.w, sgeom.w+margin.left+margin.right);
  64                 ageom.h = max(ageom.h, sgeom.h+margin.top+margin.bottom);
  65         }
  66 }
  67
  68 void Entry::set_text(const string &t)
  69 {
  70         text = t;
  71         edit_pos = text.size();
  72
  73         if(multiline)
  74                 check_view_range();
  75
  76         rebuild();
  77 }
  78
  79 void Entry::set_edit_size(unsigned w, unsigned h)
  80 {
  81         edit_width = w;
  82         edit_height = h;
  83         signal_autosize_changed.emit();
  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::rebuild_special(const Part &part)
 104 {
 105         if(part.get_name()=="text")
 106                 text.build(part, state, geom, first_row, part_cache);
 107         else if(part.get_name()=="cursor")
 108         {
 109                 const Graphic *graphic = part.get_graphic(state);
 110                 if(!text_part || !graphic || !graphic->get_texture())
 111                         return;
 112
 113                 unsigned row, col;
 114                 text.offset_to_coords(edit_pos, row, col);
 115
 116                 if(row<first_row || row>=first_row+visible_rows)
 117                         return;
 118
 119                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 120
 121                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 122                 bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 123                 graphic->build(part.get_geometry().w, part.get_geometry().h, bld);
 124         }
 125         else
 126                 Widget::rebuild_special(part);
 127 }
 128
 129 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 130 {
 131         if(part.get_name()=="slider" && multiline)
 132                 slider->render(renderer);
 133 }
 134
 135 void Entry::key_press(unsigned key, unsigned)
 136 {
 137         got_key_press = true;
 138         if(key==Input::KEY_LEFT)
 139         {
 140                 if(edit_pos>0)
 141                         set_edit_position(edit_pos-1);
 142         }
 143         else if(key==Input::KEY_RIGHT)
 144         {
 145                 if(edit_pos<text.size())
 146                         set_edit_position(edit_pos+1);
 147         }
 148         else if(key==Input::KEY_DOWN && multiline)
 149         {
 150                 unsigned row, col;
 151                 text.offset_to_coords(edit_pos, row, col);
 152                 set_edit_position(text.coords_to_offset(row+1, col));
 153         }
 154         else if(key==Input::KEY_UP && multiline)
 155         {
 156                 unsigned row, col;
 157                 text.offset_to_coords(edit_pos, row, col);
 158                 set_edit_position(row>0 ? text.coords_to_offset(row-1, col) : 0);
 159         }
 160         else if(key==Input::KEY_BACKSPACE)
 161         {
 162                 if(edit_pos>0)
 163                 {
 164                         text.erase(--edit_pos, 1);
 165                         check_view_range();
 166                         rebuild();
 167                 }
 168         }
 169         else if(key==Input::KEY_ENTER)
 170         {
 171                 if(multiline)
 172                 {
 173                         text.insert(edit_pos++, "\n");
 174                         check_view_range();
 175                         rebuild();
 176                 }
 177                 else
 178                         signal_enter.emit();
 179         }
 180 }
 181
 182 void Entry::character(wchar_t ch)
 183 {
 184         if(got_key_press && ch>=' ')
 185         {
 186                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 187                 ++edit_pos;
 188                 rebuild();
 189         }
 190 }
 191
 192 void Entry::focus_out()
 193 {
 194         Widget::focus_out();
 195         got_key_press = false;
 196 }
 197
 198 void Entry::on_geometry_change()
 199 {
 200         reposition_slider();
 201
 202         if(multiline)
 203                 check_view_range();
 204 }
 205
 206 void Entry::on_style_change()
 207 {
 208         text.set_style(style);
 209
 210         if(!style)
 211         {
 212                 text_part = 0;
 213                 return;
 214         }
 215
 216         text_part = style->get_part("text");
 217
 218         reposition_slider();
 219
 220         if(multiline)
 221                 check_view_range();
 222 }
 223
 224 void Entry::set_edit_position(unsigned ep)
 225 {
 226         edit_pos = ep;
 227         check_view_range();
 228         rebuild();
 229 }
 230
 231 void Entry::reposition_slider()
 232 {
 233         if(!style || !slider)
 234                 return;
 235
 236         if(const Part *slider_part = style->get_part("slider"))
 237         {
 238                 Geometry sgeom = slider_part->get_geometry();
 239                 if(!sgeom.w || !sgeom.h)
 240                 {
 241                         Geometry wgeom;
 242                         slider->autosize(wgeom);
 243                         if(!sgeom.w)
 244                                 sgeom.w = wgeom.w;
 245                         if(!sgeom.h)
 246                                 sgeom.h = wgeom.h;
 247                 }
 248
 249                 slider_part->get_alignment().apply(sgeom, geom, slider_part->get_margin());
 250                 slider->set_geometry(sgeom);
 251         }
 252 }
 253
 254 void Entry::check_view_range()
 255 {
 256         if(!multiline || !text_part)
 257                 return;
 258
 259         float font_size = style->get_font_size();
 260         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 261
 262         const Sides &margin = text_part->get_margin();
 263         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 264
 265         unsigned row, col;
 266         text.offset_to_coords(edit_pos, row, col);
 267
 268         if(first_row>row)
 269                 first_row = row;
 270         else if(row>=first_row+visible_rows)
 271                 first_row = row+1-visible_rows;
 272
 273         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 274         slider->set_range(0, scroll);
 275         slider->set_value(scroll-first_row);
 276 }
 277
 278 void Entry::slider_value_changed(double value)
 279 {
 280         if(text.get_n_lines()>visible_rows)
 281                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 282 }
 283
 284
 285 Entry::Loader::Loader(Entry &e):
 286         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 287 {
 288         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 289         add("multiline", &Loader::multiline);
 290 }
 291
 292 void Entry::Loader::multiline(bool m)
 293 {
 294         obj.set_multiline(m);
 295 }
 296
 297 } // namespace GLtk
 298 } // namespace Msp