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_BACKSPACE)
 133         {
 134                 if(edit_pos>0)
 135                 {
 136                         text.erase(--edit_pos, 1);
 137                         check_view_range();
 138                         rebuild();
 139                 }
 140         }
 141         else if(key==Input::KEY_ENTER && multiline)
 142         {
 143                 text.insert(edit_pos++, "\n");
 144                 check_view_range();
 145                 rebuild();
 146         }
 147         else
 148                 return false;
 149
 150         return true;
 151 }
 152
 153 bool Entry::character(wchar_t ch)
 154 {
 155         if(got_key_press && ch>=' ')
 156         {
 157                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 158                 ++edit_pos;
 159                 rebuild();
 160                 return true;
 161         }
 162
 163         return false;
 164 }
 165
 166 void Entry::focus_out()
 167 {
 168         Widget::focus_out();
 169         got_key_press = false;
 170 }
 171
 172 bool Entry::navigate(Navigation nav)
 173 {
 174         if(nav==NAV_LEFT)
 175         {
 176                 if(edit_pos>0)
 177                         set_edit_position(edit_pos-1);
 178         }
 179         else if(nav==NAV_RIGHT)
 180         {
 181                 if(edit_pos<text.size())
 182                         set_edit_position(edit_pos+1);
 183         }
 184         else if(nav==NAV_DOWN && multiline)
 185         {
 186                 unsigned row, col;
 187                 text.offset_to_coords(edit_pos, row, col);
 188                 set_edit_position(text.coords_to_offset(row+1, col));
 189         }
 190         else if(nav==NAV_UP && multiline)
 191         {
 192                 unsigned row, col;
 193                 text.offset_to_coords(edit_pos, row, col);
 194                 set_edit_position(row>0 ? text.coords_to_offset(row-1, col) : 0);
 195         }
 196         else if(nav==NAV_ACCEPT && !signal_enter.empty())
 197                 signal_enter.emit();
 198         else
 199                 return false;
 200
 201         return true;
 202 }
 203
 204 void Entry::on_geometry_change()
 205 {
 206         if(multiline)
 207                 check_view_range();
 208 }
 209
 210 void Entry::on_style_change()
 211 {
 212         text.set_style(style);
 213
 214         if(!style)
 215         {
 216                 text_part = 0;
 217                 return;
 218         }
 219
 220         text_part = style->get_part("text");
 221
 222         if(multiline)
 223                 check_view_range();
 224 }
 225
 226 void Entry::set_edit_position(unsigned ep)
 227 {
 228         edit_pos = ep;
 229         check_view_range();
 230         rebuild();
 231 }
 232
 233 void Entry::check_view_range()
 234 {
 235         if(!multiline || !text_part)
 236                 return;
 237
 238         float font_size = style->get_font_size();
 239         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 240
 241         const Sides &margin = text_part->get_margin();
 242         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 243
 244         unsigned row, col;
 245         text.offset_to_coords(edit_pos, row, col);
 246
 247         if(first_row>row)
 248                 first_row = row;
 249         else if(row>=first_row+visible_rows)
 250                 first_row = row+1-visible_rows;
 251
 252         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 253         slider->set_range(0, scroll);
 254         slider->set_value(scroll-first_row);
 255 }
 256
 257 void Entry::slider_value_changed(double value)
 258 {
 259         if(text.get_n_lines()>visible_rows)
 260                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 261 }
 262
 263
 264 Entry::Loader::Loader(Entry &e):
 265         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 266 {
 267         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 268         add("multiline", &Loader::multiline);
 269 }
 270
 271 void Entry::Loader::multiline(bool m)
 272 {
 273         obj.set_multiline(m);
 274 }
 275
 276 } // namespace GLtk
 277 } // namespace Msp