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()
  32 {
  33         if(!style)
  34                 return;
  35
  36         Widget::autosize();
  37
  38         if(text_part)
  39         {
  40                 const Sides &margin = text_part->get_margin();
  41                 const GL::Font &font = style->get_font();
  42                 unsigned en_width = static_cast<unsigned>(font.get_string_width("n")*style->get_font_size());
  43                 geom.w = max(geom.w, edit_width*en_width+margin.left+margin.right);
  44
  45                 unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*style->get_font_size());
  46                 if(multiline)
  47                 {
  48                         unsigned line_spacing = style->get_font_size()*6/5;
  49                         geom.h = max(geom.h, line_height+line_spacing*(edit_height-1)+margin.top+margin.bottom);
  50                 }
  51                 else
  52                         geom.h = max(geom.h, line_height+margin.top+margin.bottom);
  53         }
  54
  55         if(multiline)
  56         {
  57                 if(const Part *slider_part = style->get_part("slider"))
  58                 {
  59                         Geometry sgeom = slider_part->get_geometry();
  60                         if(!sgeom.w || !sgeom.h)
  61                         {
  62                                 slider->autosize();
  63                                 if(!sgeom.w)
  64                                         sgeom.w = slider->get_geometry().w;
  65                                 if(!sgeom.h)
  66                                         sgeom.h = slider->get_geometry().h;
  67                         }
  68
  69                         const Sides &margin = slider_part->get_margin();
  70                         geom.w = max(geom.w, sgeom.w+margin.left+margin.right);
  71                         geom.h = max(geom.h, sgeom.h+margin.top+margin.bottom);
  72
  73                         reposition_slider();
  74                 }
  75
  76                 check_view_range();
  77         }
  78
  79         rebuild();
  80 }
  81
  82 void Entry::set_text(const string &t)
  83 {
  84         text = t;
  85         edit_pos = text.size();
  86
  87         if(multiline)
  88                 check_view_range();
  89
  90         rebuild();
  91 }
  92
  93 void Entry::set_edit_size(unsigned w, unsigned h)
  94 {
  95         edit_width = w;
  96         edit_height = h;
  97         signal_autosize_changed.emit();
  98 }
  99
 100 void Entry::set_multiline(bool m)
 101 {
 102         multiline = m;
 103         if(multiline)
 104         {
 105                 if(!slider)
 106                 {
 107                         slider = new VSlider;
 108                         add(*slider);
 109                         slider->set_step(1);
 110                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
 111                         reposition_slider();
 112                 }
 113                 check_view_range();
 114         }
 115 }
 116
 117 void Entry::rebuild_special(const Part &part)
 118 {
 119         if(part.get_name()=="text")
 120                 text.build(part, geom, first_row, part_cache);
 121         else if(part.get_name()=="cursor")
 122         {
 123                 const Graphic *graphic = part.get_graphic(state);
 124                 if(!text_part || !graphic || !graphic->get_texture())
 125                         return;
 126
 127                 unsigned row, col;
 128                 text.offset_to_coords(edit_pos, row, col);
 129
 130                 if(row<first_row || row>=first_row+visible_rows)
 131                         return;
 132
 133                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 134
 135                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 136                 bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0);
 137                 graphic->build(part.get_geometry().w, part.get_geometry().h, bld);
 138         }
 139         else
 140                 Widget::rebuild_special(part);
 141 }
 142
 143 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 144 {
 145         if(part.get_name()=="slider" && multiline)
 146                 slider->render(renderer);
 147 }
 148
 149 void Entry::key_press(unsigned key, unsigned)
 150 {
 151         got_key_press = true;
 152         if(key==Input::KEY_LEFT)
 153         {
 154                 if(edit_pos>0)
 155                         set_edit_position(edit_pos-1);
 156         }
 157         else if(key==Input::KEY_RIGHT)
 158         {
 159                 if(edit_pos<text.size())
 160                         set_edit_position(edit_pos+1);
 161         }
 162         else if(key==Input::KEY_DOWN && multiline)
 163         {
 164                 unsigned row, col;
 165                 text.offset_to_coords(edit_pos, row, col);
 166                 set_edit_position(text.coords_to_offset(row+1, col));
 167         }
 168         else if(key==Input::KEY_UP && multiline)
 169         {
 170                 unsigned row, col;
 171                 text.offset_to_coords(edit_pos, row, col);
 172                 set_edit_position(row>0 ? text.coords_to_offset(row-1, col) : 0);
 173         }
 174         else if(key==Input::KEY_BACKSPACE)
 175         {
 176                 if(edit_pos>0)
 177                 {
 178                         text.erase(--edit_pos, 1);
 179                         check_view_range();
 180                         rebuild();
 181                 }
 182         }
 183         else if(key==Input::KEY_ENTER)
 184         {
 185                 if(multiline)
 186                 {
 187                         text.insert(edit_pos++, "\n");
 188                         check_view_range();
 189                         rebuild();
 190                 }
 191                 else
 192                         signal_enter.emit();
 193         }
 194 }
 195
 196 void Entry::character(wchar_t ch)
 197 {
 198         if(got_key_press && ch>=' ')
 199         {
 200                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 201                 ++edit_pos;
 202                 rebuild();
 203         }
 204 }
 205
 206 void Entry::focus_out()
 207 {
 208         Widget::focus_out();
 209         got_key_press = false;
 210 }
 211
 212 void Entry::on_geometry_change()
 213 {
 214         reposition_slider();
 215
 216         if(multiline)
 217                 check_view_range();
 218 }
 219
 220 void Entry::on_style_change()
 221 {
 222         text.set_style(style);
 223
 224         if(!style)
 225         {
 226                 text_part = 0;
 227                 return;
 228         }
 229
 230         text_part = style->get_part("text");
 231
 232         reposition_slider();
 233
 234         if(multiline)
 235                 check_view_range();
 236 }
 237
 238 void Entry::set_edit_position(unsigned ep)
 239 {
 240         edit_pos = ep;
 241         check_view_range();
 242         rebuild();
 243 }
 244
 245 void Entry::reposition_slider()
 246 {
 247         if(!style || !slider)
 248                 return;
 249
 250         if(const Part *slider_part = style->get_part("slider"))
 251         {
 252                 Geometry sgeom = slider_part->get_geometry();
 253                 if(!sgeom.w || !sgeom.h)
 254                 {
 255                         slider->autosize();
 256                         if(!sgeom.w)
 257                                 sgeom.w = slider->get_geometry().w;
 258                         if(!sgeom.h)
 259                                 sgeom.h = slider->get_geometry().h;
 260                 }
 261
 262                 slider_part->get_alignment().apply(sgeom, geom, slider_part->get_margin());
 263                 slider->set_geometry(sgeom);
 264         }
 265 }
 266
 267 void Entry::check_view_range()
 268 {
 269         if(!multiline || !text_part)
 270                 return;
 271
 272         float font_size = style->get_font_size();
 273         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 274
 275         const Sides &margin = text_part->get_margin();
 276         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 277
 278         unsigned row, col;
 279         text.offset_to_coords(edit_pos, row, col);
 280
 281         if(first_row>row)
 282                 first_row = row;
 283         else if(row>=first_row+visible_rows)
 284                 first_row = row+1-visible_rows;
 285
 286         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 287         slider->set_range(0, scroll);
 288         slider->set_value(scroll-first_row);
 289 }
 290
 291 void Entry::slider_value_changed(double value)
 292 {
 293         if(text.get_n_lines()>visible_rows)
 294                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 295 }
 296
 297 } // namespace GLtk
 298 } // namespace Msp