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
 157                 return false;
 158
 159         return true;
 160 }
 161
 162 bool Entry::character(wchar_t ch)
 163 {
 164         if(got_key_press && ch>=' ')
 165         {
 166                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 167                 ++edit_pos;
 168                 rebuild();
 169                 return true;
 170         }
 171
 172         return false;
 173 }
 174
 175 void Entry::focus_in()
 176 {
 177         cursor_blink = true;
 178         Widget::focus_in();
 179         check_cursor_blink();
 180 }
 181
 182 void Entry::focus_out()
 183 {
 184         Widget::focus_out();
 185         got_key_press = false;
 186         check_cursor_blink();
 187 }
 188
 189 bool Entry::navigate(Navigation nav)
 190 {
 191         if(nav==NAV_LEFT)
 192         {
 193                 if(edit_pos>0)
 194                         set_edit_position(edit_pos-1);
 195         }
 196         else if(nav==NAV_RIGHT)
 197         {
 198                 if(edit_pos<text.size())
 199                         set_edit_position(edit_pos+1);
 200         }
 201         else if(nav==NAV_DOWN && multiline)
 202         {
 203                 unsigned row, col;
 204                 text.offset_to_coords(edit_pos, row, col);
 205                 set_edit_position(text.coords_to_offset(row+1, col));
 206         }
 207         else if(nav==NAV_UP && multiline)
 208         {
 209                 unsigned row, col;
 210                 text.offset_to_coords(edit_pos, row, col);
 211                 set_edit_position(row>0 ? text.coords_to_offset(row-1, col) : 0);
 212         }
 213         else if(nav==NAV_ACCEPT && !signal_enter.empty())
 214                 signal_enter.emit();
 215         else
 216                 return false;
 217
 218         return true;
 219 }
 220
 221 void Entry::animate(const Time::TimeDelta &)
 222 {
 223         cursor_blink = !cursor_blink;
 224         rebuild();
 225 }
 226
 227 void Entry::on_geometry_change()
 228 {
 229         if(multiline)
 230                 check_view_range();
 231 }
 232
 233 void Entry::on_style_change()
 234 {
 235         text.set_style(style);
 236
 237         if(!style)
 238         {
 239                 text_part = 0;
 240                 return;
 241         }
 242
 243         text_part = style->get_part("text");
 244
 245         if(multiline)
 246                 check_view_range();
 247
 248         check_cursor_blink();
 249 }
 250
 251 void Entry::set_edit_position(unsigned ep)
 252 {
 253         edit_pos = ep;
 254         check_view_range();
 255         rebuild();
 256 }
 257
 258 void Entry::check_cursor_blink()
 259 {
 260         cursor_blink = (state&FOCUS);
 261         if((state&FOCUS) && style)
 262         {
 263                 const Part *cursor_part = style->get_part("cursor");
 264                 if(cursor_part && cursor_part->get_graphic(ACTIVE|FOCUS)!=cursor_part->get_graphic(NORMAL|FOCUS))
 265                 {
 266                         set_animation_interval(Time::sec/2);
 267                         return;
 268                 }
 269         }
 270
 271         stop_animation();
 272 }
 273
 274 void Entry::check_view_range()
 275 {
 276         if(!multiline || !text_part)
 277                 return;
 278
 279         float font_size = style->get_font_size();
 280         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 281
 282         const Sides &margin = text_part->get_margin();
 283         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 284
 285         unsigned row, col;
 286         text.offset_to_coords(edit_pos, row, col);
 287
 288         if(first_row>row)
 289                 first_row = row;
 290         else if(row>=first_row+visible_rows)
 291                 first_row = row+1-visible_rows;
 292
 293         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 294         slider->set_range(0, scroll);
 295         slider->set_value(scroll-first_row);
 296 }
 297
 298 void Entry::slider_value_changed(double value)
 299 {
 300         if(text.get_n_lines()>visible_rows)
 301                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 302 }
 303
 304
 305 Entry::Loader::Loader(Entry &e):
 306         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 307 {
 308         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 309         add("multiline", &Loader::multiline);
 310 }
 311
 312 void Entry::Loader::multiline(bool m)
 313 {
 314         obj.set_multiline(m);
 315 }
 316
 317 } // namespace GLtk
 318 } // namespace Msp