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         input_type = INPUT_TEXT;
  29         set_text(t);
  30 }
  31
  32 void Entry::autosize_special(const Part &part, Geometry &ageom) const
  33 {
  34         if(part.get_name()=="text")
  35         {
  36                 const Sides &margin = part.get_margin();
  37                 const GL::Font &font = style->get_font();
  38                 unsigned en_width = static_cast<unsigned>(font.get_string_width("n")*style->get_font_size());
  39                 ageom.w = max(ageom.w, edit_width*en_width+margin.left+margin.right);
  40
  41                 unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*style->get_font_size());
  42                 if(multiline)
  43                 {
  44                         unsigned line_spacing = style->get_font_size()*6/5;
  45                         ageom.h = max(ageom.h, line_height+line_spacing*(edit_height-1)+margin.top+margin.bottom);
  46                 }
  47                 else
  48                         ageom.h = max(ageom.h, line_height+margin.top+margin.bottom);
  49         }
  50         else if(part.get_name()=="slider" && multiline)
  51                 autosize_child(*slider, part, ageom);
  52 }
  53
  54 void Entry::set_text(const string &t)
  55 {
  56         text = t;
  57         edit_pos = text.size();
  58
  59         if(multiline)
  60                 check_view_range();
  61
  62         rebuild();
  63 }
  64
  65 void Entry::set_edit_size(unsigned w, unsigned h)
  66 {
  67         edit_width = w;
  68         edit_height = h;
  69         signal_autosize_changed.emit();
  70 }
  71
  72 void Entry::set_multiline(bool m)
  73 {
  74         multiline = m;
  75         if(multiline)
  76         {
  77                 if(!slider)
  78                 {
  79                         slider = new VSlider;
  80                         add(*slider);
  81                         slider->set_step(1);
  82                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
  83                         rebuild();
  84                 }
  85                 check_view_range();
  86         }
  87 }
  88
  89 void Entry::rebuild_special(const Part &part)
  90 {
  91         if(part.get_name()=="text")
  92                 text.build(part, state, geom, first_row, part_cache);
  93         else if(part.get_name()=="cursor")
  94         {
  95                 const Graphic *graphic = part.get_graphic(state);
  96                 if(!text_part || !graphic || !graphic->get_texture())
  97                         return;
  98
  99                 unsigned row, col;
 100                 text.offset_to_coords(edit_pos, row, col);
 101
 102                 if(row<first_row || row>=first_row+visible_rows)
 103                         return;
 104
 105                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 106
 107                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 108                 bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 109                 graphic->build(part.get_geometry().w, part.get_geometry().h, bld);
 110         }
 111         else if(part.get_name()=="slider")
 112         {
 113                 if(multiline)
 114                 {
 115                         reposition_child(*slider, part);
 116                         Widget::rebuild_special(part);
 117                 }
 118         }
 119         else
 120                 Widget::rebuild_special(part);
 121 }
 122
 123 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 124 {
 125         if(part.get_name()=="slider" && multiline)
 126                 slider->render(renderer);
 127 }
 128
 129 bool Entry::key_press(unsigned key, unsigned)
 130 {
 131         got_key_press = true;
 132         if(key==Input::KEY_LEFT)
 133         {
 134                 if(edit_pos>0)
 135                         set_edit_position(edit_pos-1);
 136         }
 137         else if(key==Input::KEY_RIGHT)
 138         {
 139                 if(edit_pos<text.size())
 140                         set_edit_position(edit_pos+1);
 141         }
 142         else if(key==Input::KEY_DOWN && multiline)
 143         {
 144                 unsigned row, col;
 145                 text.offset_to_coords(edit_pos, row, col);
 146                 set_edit_position(text.coords_to_offset(row+1, col));
 147         }
 148         else if(key==Input::KEY_UP && multiline)
 149         {
 150                 unsigned row, col;
 151                 text.offset_to_coords(edit_pos, row, col);
 152                 set_edit_position(row>0 ? text.coords_to_offset(row-1, col) : 0);
 153         }
 154         else if(key==Input::KEY_BACKSPACE)
 155         {
 156                 if(edit_pos>0)
 157                 {
 158                         text.erase(--edit_pos, 1);
 159                         check_view_range();
 160                         rebuild();
 161                 }
 162         }
 163         else if(key==Input::KEY_ENTER)
 164         {
 165                 if(multiline)
 166                 {
 167                         text.insert(edit_pos++, "\n");
 168                         check_view_range();
 169                         rebuild();
 170                 }
 171                 else
 172                         signal_enter.emit();
 173         }
 174         else
 175                 return false;
 176
 177         return true;
 178 }
 179
 180 bool Entry::character(wchar_t ch)
 181 {
 182         if(got_key_press && ch>=' ')
 183         {
 184                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 185                 ++edit_pos;
 186                 rebuild();
 187                 return true;
 188         }
 189
 190         return false;
 191 }
 192
 193 void Entry::focus_out()
 194 {
 195         Widget::focus_out();
 196         got_key_press = false;
 197 }
 198
 199 void Entry::on_geometry_change()
 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         if(multiline)
 218                 check_view_range();
 219 }
 220
 221 void Entry::set_edit_position(unsigned ep)
 222 {
 223         edit_pos = ep;
 224         check_view_range();
 225         rebuild();
 226 }
 227
 228 void Entry::check_view_range()
 229 {
 230         if(!multiline || !text_part)
 231                 return;
 232
 233         float font_size = style->get_font_size();
 234         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 235
 236         const Sides &margin = text_part->get_margin();
 237         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 238
 239         unsigned row, col;
 240         text.offset_to_coords(edit_pos, row, col);
 241
 242         if(first_row>row)
 243                 first_row = row;
 244         else if(row>=first_row+visible_rows)
 245                 first_row = row+1-visible_rows;
 246
 247         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 248         slider->set_range(0, scroll);
 249         slider->set_value(scroll-first_row);
 250 }
 251
 252 void Entry::slider_value_changed(double value)
 253 {
 254         if(text.get_n_lines()>visible_rows)
 255                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 256 }
 257
 258
 259 Entry::Loader::Loader(Entry &e):
 260         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 261 {
 262         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 263         add("multiline", &Loader::multiline);
 264 }
 265
 266 void Entry::Loader::multiline(bool m)
 267 {
 268         obj.set_multiline(m);
 269 }
 270
 271 } // namespace GLtk
 272 } // namespace Msp