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)
  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                         slider->autosize();
  55                         if(!sgeom.w)
  56                                 sgeom.w = slider->get_geometry().w;
  57                         if(!sgeom.h)
  58                                 sgeom.h = slider->get_geometry().h;
  59                 }
  60
  61                 const Sides &margin = part.get_margin();
  62                 ageom.w = max(ageom.w, sgeom.w+margin.left+margin.right);
  63                 ageom.h = max(ageom.h, sgeom.h+margin.top+margin.bottom);
  64         }
  65 }
  66
  67 void Entry::set_text(const string &t)
  68 {
  69         text = t;
  70         edit_pos = text.size();
  71
  72         if(multiline)
  73                 check_view_range();
  74
  75         rebuild();
  76 }
  77
  78 void Entry::set_edit_size(unsigned w, unsigned h)
  79 {
  80         edit_width = w;
  81         edit_height = h;
  82         signal_autosize_changed.emit();
  83 }
  84
  85 void Entry::set_multiline(bool m)
  86 {
  87         multiline = m;
  88         if(multiline)
  89         {
  90                 if(!slider)
  91                 {
  92                         slider = new VSlider;
  93                         add(*slider);
  94                         slider->set_step(1);
  95                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
  96                         reposition_slider();
  97                 }
  98                 check_view_range();
  99         }
 100 }
 101
 102 void Entry::rebuild_special(const Part &part)
 103 {
 104         if(part.get_name()=="text")
 105                 text.build(part, geom, first_row, part_cache);
 106         else if(part.get_name()=="cursor")
 107         {
 108                 const Graphic *graphic = part.get_graphic(state);
 109                 if(!text_part || !graphic || !graphic->get_texture())
 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::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 121                 bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 122                 graphic->build(part.get_geometry().w, part.get_geometry().h, bld);
 123         }
 124         else
 125                 Widget::rebuild_special(part);
 126 }
 127
 128 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 129 {
 130         if(part.get_name()=="slider" && multiline)
 131                 slider->render(renderer);
 132 }
 133
 134 void Entry::key_press(unsigned key, unsigned)
 135 {
 136         got_key_press = true;
 137         if(key==Input::KEY_LEFT)
 138         {
 139                 if(edit_pos>0)
 140                         set_edit_position(edit_pos-1);
 141         }
 142         else if(key==Input::KEY_RIGHT)
 143         {
 144                 if(edit_pos<text.size())
 145                         set_edit_position(edit_pos+1);
 146         }
 147         else if(key==Input::KEY_DOWN && multiline)
 148         {
 149                 unsigned row, col;
 150                 text.offset_to_coords(edit_pos, row, col);
 151                 set_edit_position(text.coords_to_offset(row+1, col));
 152         }
 153         else if(key==Input::KEY_UP && multiline)
 154         {
 155                 unsigned row, col;
 156                 text.offset_to_coords(edit_pos, row, col);
 157                 set_edit_position(row>0 ? text.coords_to_offset(row-1, col) : 0);
 158         }
 159         else if(key==Input::KEY_BACKSPACE)
 160         {
 161                 if(edit_pos>0)
 162                 {
 163                         text.erase(--edit_pos, 1);
 164                         check_view_range();
 165                         rebuild();
 166                 }
 167         }
 168         else if(key==Input::KEY_ENTER)
 169         {
 170                 if(multiline)
 171                 {
 172                         text.insert(edit_pos++, "\n");
 173                         check_view_range();
 174                         rebuild();
 175                 }
 176                 else
 177                         signal_enter.emit();
 178         }
 179 }
 180
 181 void Entry::character(wchar_t ch)
 182 {
 183         if(got_key_press && ch>=' ')
 184         {
 185                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 186                 ++edit_pos;
 187                 rebuild();
 188         }
 189 }
 190
 191 void Entry::focus_out()
 192 {
 193         Widget::focus_out();
 194         got_key_press = false;
 195 }
 196
 197 void Entry::on_geometry_change()
 198 {
 199         reposition_slider();
 200
 201         if(multiline)
 202                 check_view_range();
 203 }
 204
 205 void Entry::on_style_change()
 206 {
 207         text.set_style(style);
 208
 209         if(!style)
 210         {
 211                 text_part = 0;
 212                 return;
 213         }
 214
 215         text_part = style->get_part("text");
 216
 217         reposition_slider();
 218
 219         if(multiline)
 220                 check_view_range();
 221 }
 222
 223 void Entry::set_edit_position(unsigned ep)
 224 {
 225         edit_pos = ep;
 226         check_view_range();
 227         rebuild();
 228 }
 229
 230 void Entry::reposition_slider()
 231 {
 232         if(!style || !slider)
 233                 return;
 234
 235         if(const Part *slider_part = style->get_part("slider"))
 236         {
 237                 Geometry sgeom = slider_part->get_geometry();
 238                 if(!sgeom.w || !sgeom.h)
 239                 {
 240                         slider->autosize();
 241                         if(!sgeom.w)
 242                                 sgeom.w = slider->get_geometry().w;
 243                         if(!sgeom.h)
 244                                 sgeom.h = slider->get_geometry().h;
 245                 }
 246
 247                 slider_part->get_alignment().apply(sgeom, geom, slider_part->get_margin());
 248                 slider->set_geometry(sgeom);
 249         }
 250 }
 251
 252 void Entry::check_view_range()
 253 {
 254         if(!multiline || !text_part)
 255                 return;
 256
 257         float font_size = style->get_font_size();
 258         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 259
 260         const Sides &margin = text_part->get_margin();
 261         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 262
 263         unsigned row, col;
 264         text.offset_to_coords(edit_pos, row, col);
 265
 266         if(first_row>row)
 267                 first_row = row;
 268         else if(row>=first_row+visible_rows)
 269                 first_row = row+1-visible_rows;
 270
 271         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 272         slider->set_range(0, scroll);
 273         slider->set_value(scroll-first_row);
 274 }
 275
 276 void Entry::slider_value_changed(double value)
 277 {
 278         if(text.get_n_lines()>visible_rows)
 279                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 280 }
 281
 282 } // namespace GLtk
 283 } // namespace Msp