source/panel.cpp

   1 #include <msp/core/algorithm.h>
   2 #include <msp/core/maputils.h>
   3 #include "button.h"
   4 #include "column.h"
   5 #include "draghandle.h"
   6 #include "dropdown.h"
   7 #include "entry.h"
   8 #include "grid.h"
   9 #include "image.h"
  10 #include "indicator.h"
  11 #include "label.h"
  12 #include "list.h"
  13 #include "panel.h"
  14 #include "part.h"
  15 #include "progressbar.h"
  16 #include "row.h"
  17 #include "slider.h"
  18 #include "stack.h"
  19 #include "toggle.h"
  20
  21 using namespace std;
  22
  23 namespace Msp {
  24 namespace GLtk {
  25
  26 TypeRegistry<Panel::Loader::AddChildType, Panel::Loader &> Panel::widget_registry;
  27 bool Panel::widget_registry_init_done = false;
  28
  29 Panel::Panel()
  30 {
  31         input_type = INPUT_NAVIGATION;
  32 }
  33
  34 Layout &Panel::get_or_create_layout()
  35 {
  36         if(!layout)
  37         {
  38                 layout = make_unique<Layout>();
  39                 layout->set_container(*this);
  40         }
  41
  42         return *layout;
  43 }
  44
  45 void Panel::autosize_special(const Part &part, Geometry &ageom) const
  46 {
  47         if(part.get_name()=="children" && layout)
  48                 layout->autosize(ageom);
  49 }
  50
  51 void Panel::render_special(const Part &part, GL::Renderer &renderer) const
  52 {
  53         if(part.get_name()=="children")
  54         {
  55                 for(const unique_ptr<Child> &c: children)
  56                         if(c->widget->is_visible())
  57                                 c->widget->render(renderer);
  58         }
  59 }
  60
  61 bool Panel::navigate(Navigation nav)
  62 {
  63         if(Container::navigate(nav))
  64                 return true;
  65
  66         if(nav==NAV_UP || nav==NAV_DOWN || nav==NAV_LEFT || nav==NAV_RIGHT)
  67         {
  68                 int nav_x = (nav==NAV_RIGHT ? 1 : nav==NAV_LEFT ? -1 : 0);
  69                 int nav_y = (nav==NAV_UP ? 1 : nav==NAV_DOWN ? -1 : 0);
  70
  71                 int origin_x, origin_y, origin_dim;
  72                 if(input_focus)
  73                 {
  74                         const Geometry &fgeom = input_focus->get_geometry();
  75                         origin_x = fgeom.x+(nav_x*0.5+0.5)*fgeom.w;
  76                         origin_y = fgeom.y+(nav_y*0.5+0.5)*fgeom.h;
  77                         origin_dim = abs(nav_x)*fgeom.h+abs(nav_y)*fgeom.w;
  78                 }
  79                 else
  80                 {
  81                         origin_x = geom.w*(0.5-nav_x*0.5);
  82                         origin_y = geom.h*(0.5-nav_y*0.5);
  83                         origin_dim = abs(nav_x)*geom.h+abs(nav_y)*geom.w;
  84                 }
  85
  86                 if(pointer_grabbed && pointer_focus==input_focus)
  87                         return false;
  88
  89                 Widget *sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
  90                 if(!sibling && input_focus)
  91                 {
  92                         const Geometry &fgeom = input_focus->get_geometry();
  93                         origin_x -= fgeom.w*(nav_x*0.5);
  94                         origin_y -= fgeom.h*(nav_y*0.5);
  95                         sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
  96                 }
  97
  98                 if(sibling)
  99                 {
 100                         set_input_focus(sibling);
 101                         if(Panel *panel = dynamic_cast<Panel *>(sibling))
 102                                 panel->navigate(nav);
 103                         return true;
 104                 }
 105         }
 106         else if(nav==NAV_NEXT || nav==NAV_PREVIOUS)
 107         {
 108                 auto i = find(nav_order, input_focus);
 109
 110                 if(nav==NAV_NEXT)
 111                 {
 112                         if(i!=nav_order.end())
 113                                 ++i;
 114                         if(i==nav_order.end())
 115                                 i = nav_order.begin();
 116                 }
 117                 else
 118                 {
 119                         if(i==nav_order.begin())
 120                                 i = nav_order.end();
 121                         --i;
 122                 }
 123
 124                 set_input_focus(*i);
 125
 126                 return true;
 127         }
 128
 129         return false;
 130 }
 131
 132 Widget *Panel::find_next_child(int origin_x, int origin_y, int origin_dim, int nav_x, int nav_y) const
 133 {
 134         Widget *sibling = nullptr;
 135         int best_score = 0;
 136         for(const unique_ptr<Child> &c: children)
 137         {
 138                 if(c->widget==input_focus || !c->widget->is_focusable())
 139                         continue;
 140
 141                 const Geometry &cgeom = c->widget->get_geometry();
 142                 int dx = compute_delta(cgeom.x, cgeom.w, origin_x, origin_dim, nav_x);
 143                 int dy = compute_delta(cgeom.y, cgeom.h, origin_y, origin_dim, nav_y);
 144
 145                 int score = -1;
 146                 if(nav_y && nav_y*dy>=0)
 147                         score = nav_y*dy+abs(dx)*4;
 148                 else if(nav_x && nav_x*dx>=0)
 149                         score = nav_x*dx+abs(dy)*4;
 150
 151                 if(score>=0 && (!sibling || score<best_score))
 152                 {
 153                         sibling = c->widget;
 154                         best_score = score;
 155                 }
 156         }
 157
 158         return sibling;
 159 }
 160
 161 int Panel::compute_delta(int pos, int dim, int origin_pos, int origin_dim, int nav)
 162 {
 163         if(nav<0)
 164                 return pos+dim-origin_pos;
 165         else if(nav>0)
 166                 return pos-origin_pos;
 167         else if(pos+dim<origin_pos-origin_dim/2)
 168                 return pos+dim+origin_dim/2-origin_pos;
 169         else if(pos>origin_pos+origin_dim/2)
 170                 return pos-origin_pos-origin_dim/2;
 171         else
 172                 return 0;
 173 }
 174
 175 void Panel::on_size_change()
 176 {
 177         if(layout)
 178                 layout->update();
 179 }
 180
 181 void Panel::on_child_added(Widget &wdg)
 182 {
 183         if(wdg.get_input_type()!=INPUT_NONE)
 184                 nav_order.push_back(&wdg);
 185
 186         if(layout)
 187         {
 188                 layout->add_widget(wdg);
 189                 signal_autosize_changed.emit();
 190         }
 191 }
 192
 193 void Panel::on_child_removed(Widget &wdg)
 194 {
 195         auto i = std::remove(nav_order.begin(), nav_order.end(), &wdg);
 196         if(i!=nav_order.end())
 197                 nav_order.erase(i, nav_order.end());
 198
 199         if(layout)
 200         {
 201                 layout->remove_widget(wdg);
 202                 signal_autosize_changed.emit();
 203         }
 204 }
 205
 206
 207 Panel::Loader::Loader(Panel &p, map<string, Widget *> &m):
 208         DataFile::DerivedObjectLoader<Panel, Widget::Loader>(p),
 209         wdg_map(m),
 210         last_widget(nullptr)
 211 {
 212         if(!widget_registry_init_done)
 213         {
 214                 widget_registry_init_done = true;
 215                 register_child_type<Button>("button");
 216                 register_child_type<DragHandle>("draghandle");
 217                 register_child_type<Dropdown>("dropdown");
 218                 register_child_type<Entry>("entry");
 219                 register_child_type<HSlider>("hslider");
 220                 register_child_type<Image>("image");
 221                 register_child_type<Indicator>("indicator");
 222                 register_child_type<Label>("label");
 223                 register_child_type<List>("list");
 224                 register_child_type<Panel>("panel");
 225                 register_child_type<ProgressBar>("progressbar");
 226                 register_child_type<Toggle>("toggle");
 227                 register_child_type<VSlider>("vslider");
 228         }
 229
 230         add("column",    &Loader::arrangement<Column>);
 231         add("constraint",&Loader::constraint);
 232         add("expand",    &Loader::expand);
 233         add("ghost",     &Loader::ghost);
 234         add("gravity",   &Loader::gravity);
 235         add("grid",      &Loader::grid);
 236         add("layout",    &Loader::layout);
 237         add("row",       &Loader::arrangement<Row>);
 238         add("stack",     &Loader::arrangement<Stack>);
 239         widget_registry.invoke_all(*this);
 240 }
 241
 242 Widget &Panel::Loader::get_last_widget()
 243 {
 244         if(!last_widget)
 245                 throw logic_error("no widget loaded");
 246
 247         return *last_widget;
 248 }
 249
 250 template<typename T>
 251 void Panel::Loader::arrangement()
 252 {
 253         T arr(obj.get_or_create_layout());
 254         ArrangedLoader<T> ldr(*this, arr);
 255         load_sub_with(ldr);
 256 }
 257
 258 void Panel::Loader::constraint(Layout::ConstraintType type, const string &n)
 259 {
 260         Widget &src = get_last_widget();
 261         Widget &tgt = *get_item(wdg_map, n);
 262         obj.get_or_create_layout().add_constraint(src, type, tgt);
 263 }
 264
 265 void Panel::Loader::expand(bool h, bool v)
 266 {
 267         obj.get_or_create_layout().set_expand(get_last_widget(), h, v);
 268 }
 269
 270 void Panel::Loader::ghost(bool g)
 271 {
 272         obj.get_or_create_layout().set_ghost(get_last_widget(), g);
 273 }
 274
 275 void Panel::Loader::gravity(int h, int v)
 276 {
 277         obj.get_or_create_layout().set_gravity(get_last_widget(), h, v);
 278 }
 279
 280 void Panel::Loader::grid(size_t cols)
 281 {
 282         Grid grd(obj.get_or_create_layout(), cols);
 283         ArrangedLoader<Grid> ldr(*this, grd);
 284         load_sub_with(ldr);
 285 }
 286
 287 void Panel::Loader::layout()
 288 {
 289         Layout::Loader ldr(obj.get_or_create_layout(), wdg_map);
 290         load_sub_with(ldr);
 291 }
 292
 293 template<>
 294 void Panel::Loader::unnamed_child<Panel>()
 295 {
 296         unique_ptr<Panel> pnl = make_unique<Panel>();
 297         load_sub(*pnl, wdg_map);
 298         Widget *wdg = pnl.get();
 299         obj.add(move(pnl));
 300         last_widget = wdg;
 301 }
 302
 303
 304 template<typename T>
 305 Panel::ArrangedLoader<T>::ArrangedLoader(Loader &ldr, T &arr):
 306         arr_loader(arr)
 307 {
 308         add_auxiliary_loader(ldr);
 309         add_auxiliary_loader(arr_loader);
 310 }
 311
 312 } // namespace GLtk
 313 } // namespace Msp