source/widget.cpp

   1 #include <msp/gl/matrix.h>
   2 #include <msp/strings/format.h>
   3 #include "container.h"
   4 #include "resources.h"
   5 #include "root.h"
   6 #include "widget.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace GLtk {
  12
  13 Widget::Widget():
  14         style(0),
  15         state(NORMAL),
  16         visible(true),
  17         input_type(INPUT_NONE),
  18         parent(0)
  19 { }
  20
  21 Widget::~Widget()
  22 {
  23         if(parent)
  24         {
  25                 Container *p = parent;
  26                 parent = 0;
  27                 p->remove(*this);
  28         }
  29 }
  30
  31 void Widget::set_position(int x, int y)
  32 {
  33         set_geometry(Geometry(x, y, geom.w, geom.h));
  34 }
  35
  36 void Widget::set_size(unsigned w, unsigned h)
  37 {
  38         set_geometry(Geometry(geom.x, geom.y, w, h));
  39 }
  40
  41 void Widget::autosize()
  42 {
  43         Geometry ageom;
  44         autosize(ageom);
  45         set_geometry(ageom);
  46 }
  47
  48 void Widget::autosize(Geometry &ageom) const
  49 {
  50         if(!style)
  51                 return;
  52
  53         ageom = Geometry(geom.x, geom.y, 0, 0);
  54         const Style::PartSeq &parts = style->get_parts();
  55         for(Style::PartSeq::const_iterator i=parts.begin(); i!=parts.end(); ++i)
  56         {
  57                 if(i->get_name().empty())
  58                 {
  59                         const Geometry &pgeom = i->get_geometry();
  60                         const Sides &pmargin = i->get_margin();
  61                         ageom.w = max(ageom.w, pgeom.w+pmargin.left+pmargin.right);
  62                         ageom.h = max(ageom.h, pgeom.h+pmargin.top+pmargin.bottom);
  63                 }
  64                 else
  65                         autosize_special(*i, ageom);
  66         }
  67 }
  68
  69 void Widget::set_geometry(const Geometry &g)
  70 {
  71         bool size_changed = (g.w!=geom.w || g.h!=geom.h);
  72         geom = g;
  73         if(size_changed)
  74         {
  75                 on_size_change();
  76                 mark_rebuild();
  77         }
  78 }
  79
  80 void Widget::map_coords_to_ancestor(int &x, int &y, const Widget &ancestor) const
  81 {
  82         for(const Widget *w=this; w; w=w->get_parent())
  83         {
  84                 if(w==&ancestor)
  85                         return;
  86
  87                 const Geometry &wgeom = w->get_geometry();
  88                 x += wgeom.x;
  89                 y += wgeom.y;
  90         }
  91
  92         throw hierarchy_error("not an ancestor");
  93 }
  94
  95 void Widget::map_coords_to_root(int &x, int &y) const
  96 {
  97         for(const Widget *w=this; w; w=w->get_parent())
  98         {
  99                 const Geometry &wgeom = w->get_geometry();
 100                 x += wgeom.x;
 101                 y += wgeom.y;
 102         }
 103 }
 104
 105 void Widget::set_parent(Container *p)
 106 {
 107         if(parent && p)
 108                 throw hierarchy_error("widget already parented");
 109         else if(p==parent)
 110                 return;
 111
 112         try
 113         {
 114                 parent = p;
 115
 116                 on_reparent();
 117                 update_style();
 118         }
 119         catch(...)
 120         {
 121                 // The container has not yet added the widget as its child
 122                 parent = 0;
 123                 throw;
 124         }
 125 }
 126
 127 void Widget::set_style(const string &s)
 128 {
 129         style_name = s;
 130         update_style();
 131 }
 132
 133 void Widget::update_style()
 134 {
 135         Widget *top;
 136         for(top=this; top->parent; top=top->parent) ;
 137         Root *root = dynamic_cast<Root *>(top);
 138         if(!root)
 139                 style = 0;
 140         else
 141         {
 142                 string sname = get_class();
 143                 if(!style_name.empty())
 144                 {
 145                         sname += '-';
 146                         sname += style_name;
 147                 }
 148
 149                 style = &root->get_resources().get<Style>(sname);
 150         }
 151
 152         on_style_change();
 153         signal_autosize_changed.emit();
 154         mark_rebuild();
 155 }
 156
 157 void Widget::set_tooltip(const string &t)
 158 {
 159         tooltip = t;
 160 }
 161
 162 void Widget::set_visible(bool v)
 163 {
 164         if(v==visible)
 165                 return;
 166
 167         visible = v;
 168
 169         signal_visibility_changed.emit(visible);
 170 }
 171
 172 void Widget::set_focusable(bool f)
 173 {
 174         input_type = (f ? INPUT_TEXT : INPUT_NONE);
 175 }
 176
 177 void Widget::set_focus()
 178 {
 179         if(!parent)
 180                 throw hierarchy_error("no parent");
 181         if(!visible)
 182                 throw logic_error("!visible");
 183
 184         signal_request_focus.emit();
 185 }
 186
 187 void Widget::set_enabled(bool e)
 188 {
 189         set_state(DISABLED, (e ? NORMAL : DISABLED));
 190 }
 191
 192 void Widget::set_state(State mask, State bits)
 193 {
 194         State old_state = state;
 195         state = (state&~mask)|bits;
 196         if(style && style->compare_states(old_state, state))
 197                 mark_rebuild();
 198 }
 199
 200 void Widget::set_animation_interval(const Time::TimeDelta &iv)
 201 {
 202         if(iv<Time::zero)
 203                 throw invalid_argument("Widget::set_animation_interval");
 204
 205         anim_interval = iv;
 206         signal_request_animation.emit(anim_interval);
 207 }
 208
 209 void Widget::stop_animation()
 210 {
 211         set_animation_interval(Time::zero);
 212 }
 213
 214 void Widget::mark_rebuild()
 215 {
 216         if(rebuild_needed)
 217                 return;
 218
 219         rebuild_needed = true;
 220         signal_rebuild_needed.emit();
 221 }
 222
 223 void Widget::rebuild_hierarchy()
 224 {
 225         if(rebuild_needed)
 226         {
 227                 rebuild_needed = false;
 228                 rebuild();
 229         }
 230 }
 231
 232 void Widget::rebuild()
 233 {
 234         if(!style)
 235                 return;
 236
 237         PartCache::Rebuild rebuild_cache(part_cache);
 238         const Style::PartSeq &parts = style->get_parts();
 239         for(Style::PartSeq::const_iterator i=parts.begin(); i!=parts.end(); ++i)
 240         {
 241                 if(i->get_name().empty())
 242                         i->build(geom, state, part_cache);
 243                 else
 244                         rebuild_special(*i);
 245         }
 246 }
 247
 248 void Widget::rebuild_special(const Part &part)
 249 {
 250         part_cache.insert_special(part);
 251 }
 252
 253 void Widget::render(GL::Renderer &renderer) const
 254 {
 255         if(!style)
 256                 throw logic_error(format("Attempt to render a widget with null style (class=\"%s\", style_name=\"%s\")", get_class(), style_name));
 257
 258         static const GL::Tag texture_tag("ui_tex");
 259
 260         GL::Renderer::Push _push(renderer);
 261         int x = 0;
 262         int y = 0;
 263         map_coords_to_root(x, y);
 264         renderer.set_matrix(GL::Matrix::translation(x, y, 0));
 265         const PartCache::PartList &parts = part_cache.get_parts();
 266         for(PartCache::PartList::const_iterator i=parts.begin(); i!=parts.end(); ++i)
 267         {
 268                 if(i->mesh && i->texture)
 269                 {
 270                         renderer.set_texture(texture_tag, i->texture, &style->get_sampler());
 271                         i->mesh->draw(renderer);
 272                 }
 273                 else if(i->part)
 274                         render_special(*i->part, renderer);
 275         }
 276 }
 277
 278 void Widget::pointer_enter()
 279 {
 280         set_state(HOVER);
 281 }
 282
 283 void Widget::pointer_leave()
 284 {
 285         clear_state(HOVER);
 286 }
 287
 288 void Widget::touch_press(int x, int y, unsigned finger)
 289 {
 290         if(finger==0)
 291                 button_press(x, y, 1);
 292 }
 293
 294 void Widget::touch_release(int x, int y, unsigned finger)
 295 {
 296         if(finger==0)
 297                 button_release(x, y, 1);
 298 }
 299
 300 void Widget::touch_motion(int x, int y, unsigned finger)
 301 {
 302         if(finger==0)
 303                 pointer_motion(x, y);
 304 }
 305
 306 void Widget::focus_in()
 307 {
 308         set_state(FOCUS);
 309 }
 310
 311 void Widget::focus_out()
 312 {
 313         clear_state(FOCUS);
 314 }
 315
 316
 317 Widget::Loader::Loader(Widget &w):
 318         DataFile::ObjectLoader<Widget>(w)
 319 {
 320         add("position", &Loader::position);
 321         add("size",     &Loader::size);
 322         add("style",    &Loader::style);
 323         add("visible",  &Widget::visible);
 324 }
 325
 326 void Widget::Loader::position(int x, int y)
 327 {
 328         obj.set_position(x, y);
 329 }
 330
 331 void Widget::Loader::size(unsigned w, unsigned h)
 332 {
 333         obj.set_size(w, h);
 334 }
 335
 336 void Widget::Loader::style(const string &s)
 337 {
 338         obj.set_style(s);
 339 }
 340
 341 } // namespace GLtk
 342 } // namespace Msp