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 void Entry::touch_press(int x, int y, unsigned finger)
 130 {
 131         if(finger==0)
 132                 set_focus();
 133         Widget::touch_press(x, y, finger);
 134 }
 135
 136 bool Entry::key_press(unsigned key, unsigned)
 137 {
 138         got_key_press = true;
 139         if(key==Input::KEY_BACKSPACE)
 140         {
 141                 if(edit_pos>0)
 142                 {
 143                         text.erase(--edit_pos, 1);
 144                         check_view_range();
 145                         rebuild();
 146                 }
 147         }
 148         else if(key==Input::KEY_ENTER && multiline)
 149         {
 150                 text.insert(edit_pos++, "\n");
 151                 check_view_range();
 152                 rebuild();
 153         }
 154         else
 155                 return false;
 156
 157         return true;
 158 }
 159
 160 bool Entry::character(wchar_t ch)
 161 {
 162         if(got_key_press && ch>=' ')
 163         {
 164                 text.insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 165                 ++edit_pos;
 166                 rebuild();
 167                 return true;
 168         }
 169
 170         return false;
 171 }
 172
 173 void Entry::focus_out()
 174 {
 175         Widget::focus_out();
 176         got_key_press = false;
 177 }
 178
 179 bool Entry::navigate(Navigation nav)
 180 {
 181         if(nav==NAV_LEFT)
 182         {
 183                 if(edit_pos>0)
 184                         set_edit_position(edit_pos-1);
 185         }
 186         else if(nav==NAV_RIGHT)
 187         {
 188                 if(edit_pos<text.size())
 189                         set_edit_position(edit_pos+1);
 190         }
 191         else if(nav==NAV_DOWN && multiline)
 192         {
 193                 unsigned row, col;
 194                 text.offset_to_coords(edit_pos, row, col);
 195                 set_edit_position(text.coords_to_offset(row+1, col));
 196         }
 197         else if(nav==NAV_UP && multiline)
 198         {
 199                 unsigned row, col;
 200                 text.offset_to_coords(edit_pos, row, col);
 201                 set_edit_position(row>0 ? text.coords_to_offset(row-1, col) : 0);
 202         }
 203         else if(nav==NAV_ACCEPT && !signal_enter.empty())
 204                 signal_enter.emit();
 205         else
 206                 return false;
 207
 208         return true;
 209 }
 210
 211 void Entry::on_geometry_change()
 212 {
 213         if(multiline)
 214                 check_view_range();
 215 }
 216
 217 void Entry::on_style_change()
 218 {
 219         text.set_style(style);
 220
 221         if(!style)
 222         {
 223                 text_part = 0;
 224                 return;
 225         }
 226
 227         text_part = style->get_part("text");
 228
 229         if(multiline)
 230                 check_view_range();
 231 }
 232
 233 void Entry::set_edit_position(unsigned ep)
 234 {
 235         edit_pos = ep;
 236         check_view_range();
 237         rebuild();
 238 }
 239
 240 void Entry::check_view_range()
 241 {
 242         if(!multiline || !text_part)
 243                 return;
 244
 245         float font_size = style->get_font_size();
 246         unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
 247
 248         const Sides &margin = text_part->get_margin();
 249         visible_rows = max((geom.h-margin.top-margin.bottom)/line_spacing, 1U);
 250
 251         unsigned row, col;
 252         text.offset_to_coords(edit_pos, row, col);
 253
 254         if(first_row>row)
 255                 first_row = row;
 256         else if(row>=first_row+visible_rows)
 257                 first_row = row+1-visible_rows;
 258
 259         unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 260         slider->set_range(0, scroll);
 261         slider->set_value(scroll-first_row);
 262 }
 263
 264 void Entry::slider_value_changed(double value)
 265 {
 266         if(text.get_n_lines()>visible_rows)
 267                 first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
 268 }
 269
 270
 271 Entry::Loader::Loader(Entry &e):
 272         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 273 {
 274         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 275         add("multiline", &Loader::multiline);
 276 }
 277
 278 void Entry::Loader::multiline(bool m)
 279 {
 280         obj.set_multiline(m);
 281 }
 282
 283 } // namespace GLtk
 284 } // namespace Msp