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) const
  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                 autosize_child(*slider, part, ageom);
  51 }
  52
  53 void Entry::set_text(const string &t)
  54 {
  55         text = t;
  56         edit_pos = text.size();
  57
  58         if(multiline)
  59                 check_view_range();
  60
  61         rebuild();
  62 }
  63
  64 void Entry::set_edit_size(unsigned w, unsigned h)
  65 {
  66         edit_width = w;
  67         edit_height = h;
  68         signal_autosize_changed.emit();
  69 }
  70
  71 void Entry::set_multiline(bool m)
  72 {
  73         multiline = m;
  74         if(multiline)
  75         {
  76                 if(!slider)
  77                 {
  78                         slider = new VSlider;
  79                         add(*slider);
  80                         slider->set_step(1);
  81                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
  82                         rebuild();
  83                 }
  84                 check_view_range();
  85         }
  86 }
  87
  88 void Entry::rebuild_special(const Part &part)
  89 {
  90         if(part.get_name()=="text")
  91                 text.build(part, state, geom, first_row, part_cache);
  92         else if(part.get_name()=="cursor")
  93         {
  94                 const Graphic *graphic = part.get_graphic(state);
  95                 if(!text_part || !graphic || !graphic->get_texture())
  96                         return;
  97
  98                 unsigned row, col;
  99                 text.offset_to_coords(edit_pos, row, col);
 100
 101                 if(row<first_row || row>=first_row+visible_rows)
 102                         return;
 103
 104                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 105
 106                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 107                 bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 108                 graphic->build(part.get_geometry().w, part.get_geometry().h, bld);
 109         }
 110         else if(part.get_name()=="slider")
 111         {
 112                 if(multiline)
 113                 {
 114                         reposition_child(*slider, part);
 115                         Widget::rebuild_special(part);
 116                 }
 117         }
 118         else
 119                 Widget::rebuild_special(part);
 120 }
 121
 122 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 123 {
 124         if(part.get_name()=="slider" && multiline)
 125                 slider->render(renderer);
 126 }
 127
 128 bool Entry::key_press(unsigned key, unsigned)
 129 {
 130         got_key_press = true;
 131         if(key==Input::KEY_LEFT)
 132         {
 133                 if(edit_pos>0)
 134                         set_edit_position(edit_pos-1);
 135         }
 136         else if(key==Input::KEY_RIGHT)
 137         {
 138                 if(edit_pos<text.size())
 139                         set_edit_position(edit_pos+1);
 140         }
 141         else if(key==Input::KEY_DOWN && multiline)
 142         {
 143                 unsigned row, col;
 144                 text.offset_to_coords(edit_pos, row, col);
 145                 set_edit_position(text.coords_to_offset(row+1, col));
 146         }
 147         else if(key==Input::KEY_UP && multiline)
 148         {
 149                 unsigned row, col;
 150                 text.offset_to_coords(edit_pos, row, col);
 151                 set_edit_position(row>0 ? text.coords_to_offset(row-1, col) : 0);
 152         }
 153         else if(key==Input::KEY_BACKSPACE)
 154         {
 155                 if(edit_pos>0)
 156                 {
 157                         text.erase(--edit_pos, 1);
 158                         check_view_range();
 159                         rebuild();
 160                 }
 161         }
 162         else if(key==Input::KEY_ENTER)
 163         {
 164                 if(multiline)
 165                 {
 166                         text.insert(edit_pos++, "\n");
 167                         check_view_range();
 168                         rebuild();
 169                 }
 170                 else
 171                         signal_enter.emit();
 172         }
 173         else
 174                 return false;
 175
 176         return true;
 177 }
 178
 179 bool Entry::character(wchar_t ch)
 180 {
 181         if(got_key_press && ch>=' ')
 182         {
 183                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 184                 ++edit_pos;
 185                 rebuild();
 186                 return true;
 187         }
 188
 189         return false;
 190 }
 191
 192 void Entry::focus_out()
 193 {
 194         Widget::focus_out();
 195         got_key_press = false;
 196 }
 197
 198 void Entry::on_geometry_change()
 199 {
 200         if(multiline)
 201                 check_view_range();
 202 }
 203
 204 void Entry::on_style_change()
 205 {
 206         text.set_style(style);
 207
 208         if(!style)
 209         {
 210                 text_part = 0;
 211                 return;
 212         }
 213
 214         text_part = style->get_part("text");
 215
 216         if(multiline)
 217                 check_view_range();
 218 }
 219
 220 void Entry::set_edit_position(unsigned ep)
 221 {
 222         edit_pos = ep;
 223         check_view_range();
 224         rebuild();
 225 }
 226
 227 void Entry::check_view_range()
 228 {
 229         if(!multiline || !text_part)
 230                 return;
 231
 232         float font_size = style->get_font_size();
 233         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 234
 235         const Sides &margin = text_part->get_margin();
 236         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 237
 238         unsigned row, col;
 239         text.offset_to_coords(edit_pos, row, col);
 240
 241         if(first_row>row)
 242                 first_row = row;
 243         else if(row>=first_row+visible_rows)
 244                 first_row = row+1-visible_rows;
 245
 246         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 247         slider->set_range(0, scroll);
 248         slider->set_value(scroll-first_row);
 249 }
 250
 251 void Entry::slider_value_changed(double value)
 252 {
 253         if(text.get_n_lines()>visible_rows)
 254                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 255 }
 256
 257
 258 Entry::Loader::Loader(Entry &e):
 259         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 260 {
 261         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 262         add("multiline", &Loader::multiline);
 263 }
 264
 265 void Entry::Loader::multiline(bool m)
 266 {
 267         obj.set_multiline(m);
 268 }
 269
 270 } // namespace GLtk
 271 } // namespace Msp