source/panel.cpp

   1 #include <algorithm>
   2 #include <msp/core/maputils.h>
   3 #include <msp/core/refptr.h>
   4 #include "button.h"
   5 #include "column.h"
   6 #include "draghandle.h"
   7 #include "dropdown.h"
   8 #include "entry.h"
   9 #include "grid.h"
  10 #include "hslider.h"
  11 #include "image.h"
  12 #include "indicator.h"
  13 #include "label.h"
  14 #include "list.h"
  15 #include "panel.h"
  16 #include "part.h"
  17 #include "row.h"
  18 #include "stack.h"
  19 #include "toggle.h"
  20 #include "vslider.h"
  21
  22 using namespace std;
  23
  24 namespace Msp {
  25 namespace GLtk {
  26
  27 Panel::Panel():
  28         layout(0)
  29 {
  30         input_type = INPUT_NAVIGATION;
  31 }
  32
  33 Panel::~Panel()
  34 {
  35         delete layout;
  36         layout = 0;
  37 }
  38
  39 void Panel::set_layout(Layout *l)
  40 {
  41         l->set_container(*this);
  42         delete layout;
  43         layout = l;
  44 }
  45
  46 void Panel::autosize_special(const Part &part, Geometry &ageom) const
  47 {
  48         if(part.get_name()=="children" && layout)
  49                 layout->autosize(ageom);
  50 }
  51
  52 void Panel::render_special(const Part &part, GL::Renderer &renderer) const
  53 {
  54         if(part.get_name()=="children")
  55         {
  56                 for(list<Container::Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
  57                         if((*i)->widget->is_visible())
  58                                 (*i)->widget->render(renderer);
  59         }
  60 }
  61
  62 bool Panel::navigate(Navigation nav)
  63 {
  64         if(Container::navigate(nav))
  65                 return true;
  66
  67         if(nav==NAV_UP || nav==NAV_DOWN || nav==NAV_LEFT || nav==NAV_RIGHT)
  68         {
  69                 int nav_x = (nav==NAV_RIGHT ? 1 : nav==NAV_LEFT ? -1 : 0);
  70                 int nav_y = (nav==NAV_UP ? 1 : nav==NAV_DOWN ? -1 : 0);
  71
  72                 int origin_x, origin_y, origin_dim;
  73                 if(input_focus)
  74                 {
  75                         const Geometry &fgeom = input_focus->get_geometry();
  76                         origin_x = fgeom.x+(nav_x*0.5+0.5)*fgeom.w;
  77                         origin_y = fgeom.y+(nav_y*0.5+0.5)*fgeom.h;
  78                         origin_dim = abs(nav_x)*fgeom.h+abs(nav_y)*fgeom.w;
  79                 }
  80                 else
  81                 {
  82                         origin_x = geom.w*(0.5-nav_x*0.5);
  83                         origin_y = geom.h*(0.5-nav_y*0.5);
  84                         origin_dim = abs(nav_x)*geom.h+abs(nav_y)*geom.w;
  85                 }
  86
  87                 Widget *sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
  88                 if(!sibling && input_focus)
  89                 {
  90                         const Geometry &fgeom = input_focus->get_geometry();
  91                         origin_x -= fgeom.w*(nav_x*0.5);
  92                         origin_y -= fgeom.h*(nav_y*0.5);
  93                         sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
  94                 }
  95
  96                 if(sibling)
  97                 {
  98                         set_input_focus(sibling);
  99                         if(Panel *panel = dynamic_cast<Panel *>(sibling))
 100                                 panel->navigate(nav);
 101                         return true;
 102                 }
 103         }
 104
 105         return false;
 106 }
 107
 108 Widget *Panel::find_next_child(int origin_x, int origin_y, int origin_dim, int nav_x, int nav_y) const
 109 {
 110         Widget *sibling = 0;
 111         int best_score = 0;
 112         for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 113         {
 114                 if((*i)->widget==input_focus || !(*i)->widget->is_focusable())
 115                         continue;
 116
 117                 const Geometry &cgeom = (*i)->widget->get_geometry();
 118                 int dx = compute_delta(cgeom.x, cgeom.w, origin_x, origin_dim, nav_x);
 119                 int dy = compute_delta(cgeom.y, cgeom.h, origin_y, origin_dim, nav_y);
 120
 121                 int score = -1;
 122                 if(nav_y && nav_y*dy>=0)
 123                         score = nav_y*dy+abs(dx)*4;
 124                 else if(nav_x && nav_x*dx>=0)
 125                         score = nav_x*dx+abs(dy)*4;
 126
 127                 if(score>=0 && (!sibling || score<best_score))
 128                 {
 129                         sibling = (*i)->widget;
 130                         best_score = score;
 131                 }
 132         }
 133
 134         return sibling;
 135 }
 136
 137 int Panel::compute_delta(int pos, int dim, int origin_pos, int origin_dim, int nav)
 138 {
 139         if(nav<0)
 140                 return pos+dim-origin_pos;
 141         else if(nav>0)
 142                 return pos-origin_pos;
 143         else if(pos+dim<origin_pos-origin_dim/2)
 144                 return pos+dim+origin_dim/2-origin_pos;
 145         else if(pos>origin_pos+origin_dim/2)
 146                 return pos-origin_pos-origin_dim/2;
 147         else
 148                 return 0;
 149 }
 150
 151 void Panel::on_geometry_change()
 152 {
 153         if(layout)
 154                 layout->update();
 155 }
 156
 157 void Panel::on_child_added(Widget &wdg)
 158 {
 159         if(layout)
 160         {
 161                 layout->add_widget(wdg);
 162                 signal_autosize_changed.emit();
 163         }
 164 }
 165
 166 void Panel::on_child_removed(Widget &wdg)
 167 {
 168         if(layout)
 169         {
 170                 layout->remove_widget(wdg);
 171                 signal_autosize_changed.emit();
 172         }
 173 }
 174
 175
 176 Panel::Loader::Loader(Panel &p, map<string, Widget *> &m):
 177         DataFile::DerivedObjectLoader<Panel, Widget::Loader>(p),
 178         wdg_map(m),
 179         last_widget(0)
 180 {
 181         add_child_type<Button>("button");
 182         add("column",    &Loader::arrangement<Column>);
 183         add("constraint",&Loader::constraint);
 184         add_child_type<DragHandle>("draghandle");
 185         add_child_type<Dropdown>("dropdown");
 186         add_child_type<Entry>("entry");
 187         add("expand",    &Loader::expand);
 188         add("ghost",     &Loader::ghost);
 189         add("gravity",   &Loader::gravity);
 190         add("grid",      &Loader::grid);
 191         add_child_type<HSlider>("hslider");
 192         add_child_type<Image>("image");
 193         add_child_type<Indicator>("indicator");
 194         add_child_type<Label>("label");
 195         add("layout",    &Loader::layout);
 196         add_child_type<List>("list");
 197         add_child_type<Panel>("panel");
 198         add("row",       &Loader::arrangement<Row>);
 199         add("stack",     &Loader::arrangement<Stack>);
 200         add_child_type<Toggle>("toggle");
 201         add_child_type<VSlider>("vslider");
 202 }
 203
 204 template<typename T>
 205 void Panel::Loader::add_child_type(const string &keyword)
 206 {
 207         add(keyword, &Loader::child<T>);
 208         add(keyword, &Loader::unnamed_child<T>);
 209 }
 210
 211 Layout &Panel::Loader::get_layout()
 212 {
 213         if(!obj.layout)
 214                 obj.set_layout(new Layout);
 215
 216         return *obj.layout;
 217 }
 218
 219 Widget &Panel::Loader::get_last_widget()
 220 {
 221         if(!last_widget)
 222                 throw logic_error("no widget loaded");
 223
 224         return *last_widget;
 225 }
 226
 227 template<typename T>
 228 void Panel::Loader::arrangement()
 229 {
 230         T arr(get_layout());
 231         ArrangedLoader<T> ldr(*this, arr);
 232         load_sub_with(ldr);
 233 }
 234
 235 template<typename T>
 236 void Panel::Loader::child(const string &n)
 237 {
 238         unnamed_child<T>();
 239         wdg_map[n] = last_widget;
 240 }
 241
 242 void Panel::Loader::constraint(Layout::ConstraintType type, const string &n)
 243 {
 244         Widget &src = get_last_widget();
 245         Widget &tgt = *get_item(wdg_map, n);
 246         get_layout().add_constraint(src, type, tgt);
 247 }
 248
 249 void Panel::Loader::expand(bool h, bool v)
 250 {
 251         get_layout().set_expand(get_last_widget(), h, v);
 252 }
 253
 254 void Panel::Loader::ghost(bool g)
 255 {
 256         get_layout().set_ghost(get_last_widget(), g);
 257 }
 258
 259 void Panel::Loader::gravity(int h, int v)
 260 {
 261         get_layout().set_gravity(get_last_widget(), h, v);
 262 }
 263
 264 void Panel::Loader::grid(unsigned cols)
 265 {
 266         Grid grd(get_layout(), cols);
 267         ArrangedLoader<Grid> ldr(*this, grd);
 268         load_sub_with(ldr);
 269 }
 270
 271 void Panel::Loader::layout()
 272 {
 273         Layout::Loader ldr(get_layout(), wdg_map);
 274         load_sub_with(ldr);
 275 }
 276
 277 template<typename T>
 278 void Panel::Loader::unnamed_child()
 279 {
 280         RefPtr<T> chl = new T();
 281         load_sub(*chl);
 282         obj.add(*chl.get());
 283         last_widget = chl.release();
 284 }
 285
 286 template<>
 287 void Panel::Loader::unnamed_child<Panel>()
 288 {
 289         RefPtr<Panel> pnl = new Panel();
 290         load_sub(*pnl, wdg_map);
 291         obj.add(*pnl.get());
 292         last_widget = pnl.release();
 293 }
 294
 295 template<typename T>
 296 Panel::ArrangedLoader<T>::ArrangedLoader(Loader &ldr, T &arr):
 297         arr_loader(arr)
 298 {
 299         add_auxiliary_loader(ldr);
 300         add_auxiliary_loader(arr_loader);
 301 }
 302
 303 } // namespace GLtk
 304 } // namespace Msp