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         cursor_blink(true)
  28 {
  29         input_type = INPUT_TEXT;
  30         set_text(t);
  31 }
  32
  33 void Entry::autosize_special(const Part &part, Geometry &ageom) const
  34 {
  35         if(part.get_name()=="text")
  36         {
  37                 const Sides &margin = 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                 ageom.w = max(ageom.w, edit_width*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                         ageom.h = max(ageom.h, line_height+line_spacing*(edit_height-1)+margin.top+margin.bottom);
  47                 }
  48                 else
  49                         ageom.h = max(ageom.h, line_height+margin.top+margin.bottom);
  50         }
  51         else if(part.get_name()=="slider" && multiline)
  52                 autosize_child(*slider, part, ageom);
  53 }
  54
  55 void Entry::set_text(const string &t)
  56 {
  57         text = t;
  58         edit_pos = text.size();
  59
  60         if(multiline)
  61                 check_view_range();
  62
  63         rebuild();
  64 }
  65
  66 void Entry::set_edit_size(unsigned w, unsigned h)
  67 {
  68         edit_width = w;
  69         edit_height = h;
  70         signal_autosize_changed.emit();
  71 }
  72
  73 void Entry::set_multiline(bool m)
  74 {
  75         multiline = m;
  76         if(multiline)
  77         {
  78                 if(!slider)
  79                 {
  80                         slider = new VSlider;
  81                         add(*slider);
  82                         slider->set_step(1);
  83                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
  84                         rebuild();
  85                 }
  86                 check_view_range();
  87         }
  88 }
  89
  90 void Entry::rebuild_special(const Part &part)
  91 {
  92         if(part.get_name()=="text")
  93                 text.build(part, state, geom, first_row, part_cache);
  94         else if(part.get_name()=="cursor")
  95         {
  96                 State cursor_state = (cursor_blink ? ACTIVE : NORMAL);
  97                 const Graphic *graphic = part.get_graphic(state|cursor_state);
  98                 if(!text_part || !graphic || !graphic->get_texture())
  99                         return;
 100
 101                 unsigned row, col;
 102                 text.offset_to_coords(edit_pos, row, col);
 103
 104                 if(row<first_row || row>=first_row+visible_rows)
 105                         return;
 106
 107                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 108
 109                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 110                 bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 111                 graphic->build(part.get_geometry().w, part.get_geometry().h, bld);
 112         }
 113         else if(part.get_name()=="slider")
 114         {
 115                 if(multiline)
 116                 {
 117                         reposition_child(*slider, part);
 118                         Widget::rebuild_special(part);
 119                 }
 120         }
 121         else
 122                 Widget::rebuild_special(part);
 123 }
 124
 125 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 126 {
 127         if(part.get_name()=="slider" && multiline)
 128                 slider->render(renderer);
 129 }
 130
 131 void Entry::touch_press(int x, int y, unsigned finger)
 132 {
 133         if(finger==0)
 134                 set_focus();
 135         Widget::touch_press(x, y, finger);
 136 }
 137
 138 bool Entry::key_press(unsigned key, unsigned)
 139 {
 140         got_key_press = true;
 141         if(key==Input::KEY_BACKSPACE)
 142         {
 143                 if(edit_pos>0)
 144                 {
 145                         text.erase(--edit_pos, 1);
 146                         check_view_range();
 147                         rebuild();
 148                 }
 149         }
 150         else if(key==Input::KEY_ENTER && multiline)
 151         {
 152                 text.insert(edit_pos++, "\n");
 153                 check_view_range();
 154                 rebuild();
 155         }
 156         else if(key==Input::KEY_END)
 157         {
 158                 unsigned row, col;
 159                 text.offset_to_coords(edit_pos, row, col);
 160                 set_edit_position(text.coords_to_offset(row, text.get_line_length(row)));
 161         }
 162         else if(key==Input::KEY_HOME)
 163         {
 164                 unsigned row, col;
 165                 text.offset_to_coords(edit_pos, row, col);
 166                 set_edit_position(text.coords_to_offset(row, 0));
 167         }
 168         else
 169                 return false;
 170
 171         return true;
 172 }
 173
 174 bool Entry::character(wchar_t ch)
 175 {
 176         if(got_key_press && ch>=' ')
 177         {
 178                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 179                 ++edit_pos;
 180                 rebuild();
 181                 return true;
 182         }
 183
 184         return false;
 185 }
 186
 187 void Entry::focus_in()
 188 {
 189         cursor_blink = true;
 190         Widget::focus_in();
 191         check_cursor_blink();
 192 }
 193
 194 void Entry::focus_out()
 195 {
 196         Widget::focus_out();
 197         got_key_press = false;
 198         check_cursor_blink();
 199 }
 200
 201 bool Entry::navigate(Navigation nav)
 202 {
 203         if(nav==NAV_LEFT)
 204         {
 205                 if(edit_pos>0)
 206                         set_edit_position(edit_pos-1);
 207         }
 208         else if(nav==NAV_RIGHT)
 209         {
 210                 if(edit_pos<text.size())
 211                         set_edit_position(edit_pos+1);
 212         }
 213         else if(nav==NAV_DOWN && multiline)
 214         {
 215                 unsigned row, col;
 216                 text.offset_to_coords(edit_pos, row, col);
 217                 set_edit_position(text.coords_to_offset(row+1, col));
 218         }
 219         else if(nav==NAV_UP && multiline)
 220         {
 221                 unsigned row, col;
 222                 text.offset_to_coords(edit_pos, row, col);
 223                 set_edit_position(row>0 ? text.coords_to_offset(row-1, col) : 0);
 224         }
 225         else if(nav==NAV_ACCEPT && !signal_enter.empty())
 226                 signal_enter.emit();
 227         else
 228                 return false;
 229
 230         return true;
 231 }
 232
 233 void Entry::animate(const Time::TimeDelta &)
 234 {
 235         cursor_blink = !cursor_blink;
 236         rebuild();
 237 }
 238
 239 void Entry::on_geometry_change()
 240 {
 241         if(multiline)
 242                 check_view_range();
 243 }
 244
 245 void Entry::on_style_change()
 246 {
 247         text.set_style(style);
 248
 249         if(!style)
 250         {
 251                 text_part = 0;
 252                 return;
 253         }
 254
 255         text_part = style->get_part("text");
 256
 257         if(multiline)
 258                 check_view_range();
 259
 260         check_cursor_blink();
 261 }
 262
 263 void Entry::set_edit_position(unsigned ep)
 264 {
 265         edit_pos = ep;
 266         check_view_range();
 267         rebuild();
 268 }
 269
 270 void Entry::check_cursor_blink()
 271 {
 272         cursor_blink = (state&FOCUS);
 273         if((state&FOCUS) && style)
 274         {
 275                 const Part *cursor_part = style->get_part("cursor");
 276                 if(cursor_part && cursor_part->get_graphic(ACTIVE|FOCUS)!=cursor_part->get_graphic(NORMAL|FOCUS))
 277                 {
 278                         set_animation_interval(Time::sec/2);
 279                         return;
 280                 }
 281         }
 282
 283         stop_animation();
 284 }
 285
 286 void Entry::check_view_range()
 287 {
 288         if(!multiline || !text_part)
 289                 return;
 290
 291         float font_size = style->get_font_size();
 292         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 293
 294         const Sides &margin = text_part->get_margin();
 295         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 296
 297         unsigned row, col;
 298         text.offset_to_coords(edit_pos, row, col);
 299
 300         if(first_row>row)
 301                 first_row = row;
 302         else if(row>=first_row+visible_rows)
 303                 first_row = row+1-visible_rows;
 304
 305         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 306         slider->set_range(0, scroll);
 307         slider->set_value(scroll-first_row);
 308 }
 309
 310 void Entry::slider_value_changed(double value)
 311 {
 312         if(text.get_n_lines()>visible_rows)
 313                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 314 }
 315
 316
 317 Entry::Loader::Loader(Entry &e):
 318         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 319 {
 320         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 321         add("multiline", &Loader::multiline);
 322 }
 323
 324 void Entry::Loader::multiline(bool m)
 325 {
 326         obj.set_multiline(m);
 327 }
 328
 329 } // namespace GLtk
 330 } // namespace Msp