source/panel.cpp

   1 #include <msp/core/algorithm.h>
   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 "image.h"
  11 #include "indicator.h"
  12 #include "label.h"
  13 #include "list.h"
  14 #include "panel.h"
  15 #include "part.h"
  16 #include "progressbar.h"
  17 #include "row.h"
  18 #include "slider.h"
  19 #include "stack.h"
  20 #include "toggle.h"
  21
  22 using namespace std;
  23
  24 namespace Msp {
  25 namespace GLtk {
  26
  27 TypeRegistry<Panel::Loader::AddChildType, Panel::Loader &> Panel::widget_registry;
  28 bool Panel::widget_registry_init_done = false;
  29
  30 Panel::Panel()
  31 {
  32         input_type = INPUT_NAVIGATION;
  33 }
  34
  35 Panel::~Panel()
  36 {
  37         delete layout;
  38         layout = nullptr;
  39 }
  40
  41 void Panel::set_layout(Layout *l)
  42 {
  43         l->set_container(*this);
  44         delete layout;
  45         layout = l;
  46 }
  47
  48 void Panel::autosize_special(const Part &part, Geometry &ageom) const
  49 {
  50         if(part.get_name()=="children" && layout)
  51                 layout->autosize(ageom);
  52 }
  53
  54 void Panel::render_special(const Part &part, GL::Renderer &renderer) const
  55 {
  56         if(part.get_name()=="children")
  57         {
  58                 for(const Container::Child *c: children)
  59                         if(c->widget->is_visible())
  60                                 c->widget->render(renderer);
  61         }
  62 }
  63
  64 bool Panel::navigate(Navigation nav)
  65 {
  66         if(Container::navigate(nav))
  67                 return true;
  68
  69         if(nav==NAV_UP || nav==NAV_DOWN || nav==NAV_LEFT || nav==NAV_RIGHT)
  70         {
  71                 int nav_x = (nav==NAV_RIGHT ? 1 : nav==NAV_LEFT ? -1 : 0);
  72                 int nav_y = (nav==NAV_UP ? 1 : nav==NAV_DOWN ? -1 : 0);
  73
  74                 int origin_x, origin_y, origin_dim;
  75                 if(input_focus)
  76                 {
  77                         const Geometry &fgeom = input_focus->get_geometry();
  78                         origin_x = fgeom.x+(nav_x*0.5+0.5)*fgeom.w;
  79                         origin_y = fgeom.y+(nav_y*0.5+0.5)*fgeom.h;
  80                         origin_dim = abs(nav_x)*fgeom.h+abs(nav_y)*fgeom.w;
  81                 }
  82                 else
  83                 {
  84                         origin_x = geom.w*(0.5-nav_x*0.5);
  85                         origin_y = geom.h*(0.5-nav_y*0.5);
  86                         origin_dim = abs(nav_x)*geom.h+abs(nav_y)*geom.w;
  87                 }
  88
  89                 if(pointer_grabbed && pointer_focus==input_focus)
  90                         return false;
  91
  92                 Widget *sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
  93                 if(!sibling && input_focus)
  94                 {
  95                         const Geometry &fgeom = input_focus->get_geometry();
  96                         origin_x -= fgeom.w*(nav_x*0.5);
  97                         origin_y -= fgeom.h*(nav_y*0.5);
  98                         sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
  99                 }
 100
 101                 if(sibling)
 102                 {
 103                         set_input_focus(sibling);
 104                         if(Panel *panel = dynamic_cast<Panel *>(sibling))
 105                                 panel->navigate(nav);
 106                         return true;
 107                 }
 108         }
 109         else if(nav==NAV_NEXT || nav==NAV_PREVIOUS)
 110         {
 111                 auto i = find(nav_order, input_focus);
 112
 113                 if(nav==NAV_NEXT)
 114                 {
 115                         if(i!=nav_order.end())
 116                                 ++i;
 117                         if(i==nav_order.end())
 118                                 i = nav_order.begin();
 119                 }
 120                 else
 121                 {
 122                         if(i==nav_order.begin())
 123                                 i = nav_order.end();
 124                         --i;
 125                 }
 126
 127                 set_input_focus(*i);
 128
 129                 return true;
 130         }
 131
 132         return false;
 133 }
 134
 135 Widget *Panel::find_next_child(int origin_x, int origin_y, int origin_dim, int nav_x, int nav_y) const
 136 {
 137         Widget *sibling = nullptr;
 138         int best_score = 0;
 139         for(const Child *c: children)
 140         {
 141                 if(c->widget==input_focus || !c->widget->is_focusable())
 142                         continue;
 143
 144                 const Geometry &cgeom = c->widget->get_geometry();
 145                 int dx = compute_delta(cgeom.x, cgeom.w, origin_x, origin_dim, nav_x);
 146                 int dy = compute_delta(cgeom.y, cgeom.h, origin_y, origin_dim, nav_y);
 147
 148                 int score = -1;
 149                 if(nav_y && nav_y*dy>=0)
 150                         score = nav_y*dy+abs(dx)*4;
 151                 else if(nav_x && nav_x*dx>=0)
 152                         score = nav_x*dx+abs(dy)*4;
 153
 154                 if(score>=0 && (!sibling || score<best_score))
 155                 {
 156                         sibling = c->widget;
 157                         best_score = score;
 158                 }
 159         }
 160
 161         return sibling;
 162 }
 163
 164 int Panel::compute_delta(int pos, int dim, int origin_pos, int origin_dim, int nav)
 165 {
 166         if(nav<0)
 167                 return pos+dim-origin_pos;
 168         else if(nav>0)
 169                 return pos-origin_pos;
 170         else if(pos+dim<origin_pos-origin_dim/2)
 171                 return pos+dim+origin_dim/2-origin_pos;
 172         else if(pos>origin_pos+origin_dim/2)
 173                 return pos-origin_pos-origin_dim/2;
 174         else
 175                 return 0;
 176 }
 177
 178 void Panel::on_size_change()
 179 {
 180         if(layout)
 181                 layout->update();
 182 }
 183
 184 void Panel::on_child_added(Widget &wdg)
 185 {
 186         if(wdg.get_input_type()!=INPUT_NONE)
 187                 nav_order.push_back(&wdg);
 188
 189         if(layout)
 190         {
 191                 layout->add_widget(wdg);
 192                 signal_autosize_changed.emit();
 193         }
 194 }
 195
 196 void Panel::on_child_removed(Widget &wdg)
 197 {
 198         auto i = std::remove(nav_order.begin(), nav_order.end(), &wdg);
 199         if(i!=nav_order.end())
 200                 nav_order.erase(i, nav_order.end());
 201
 202         if(layout)
 203         {
 204                 layout->remove_widget(wdg);
 205                 signal_autosize_changed.emit();
 206         }
 207 }
 208
 209
 210 Panel::Loader::Loader(Panel &p, map<string, Widget *> &m):
 211         DataFile::DerivedObjectLoader<Panel, Widget::Loader>(p),
 212         wdg_map(m),
 213         last_widget(nullptr)
 214 {
 215         if(!widget_registry_init_done)
 216         {
 217                 widget_registry_init_done = true;
 218                 register_child_type<Button>("button");
 219                 register_child_type<DragHandle>("draghandle");
 220                 register_child_type<Dropdown>("dropdown");
 221                 register_child_type<Entry>("entry");
 222                 register_child_type<HSlider>("hslider");
 223                 register_child_type<Image>("image");
 224                 register_child_type<Indicator>("indicator");
 225                 register_child_type<Label>("label");
 226                 register_child_type<List>("list");
 227                 register_child_type<Panel>("panel");
 228                 register_child_type<ProgressBar>("progressbar");
 229                 register_child_type<Toggle>("toggle");
 230                 register_child_type<VSlider>("vslider");
 231         }
 232
 233         add("column",    &Loader::arrangement<Column>);
 234         add("constraint",&Loader::constraint);
 235         add("expand",    &Loader::expand);
 236         add("ghost",     &Loader::ghost);
 237         add("gravity",   &Loader::gravity);
 238         add("grid",      &Loader::grid);
 239         add("layout",    &Loader::layout);
 240         add("row",       &Loader::arrangement<Row>);
 241         add("stack",     &Loader::arrangement<Stack>);
 242         widget_registry.invoke_all(*this);
 243 }
 244
 245 Layout &Panel::Loader::get_layout()
 246 {
 247         if(!obj.layout)
 248                 obj.set_layout(new Layout);
 249
 250         return *obj.layout;
 251 }
 252
 253 Widget &Panel::Loader::get_last_widget()
 254 {
 255         if(!last_widget)
 256                 throw logic_error("no widget loaded");
 257
 258         return *last_widget;
 259 }
 260
 261 template<typename T>
 262 void Panel::Loader::arrangement()
 263 {
 264         T arr(get_layout());
 265         ArrangedLoader<T> ldr(*this, arr);
 266         load_sub_with(ldr);
 267 }
 268
 269 void Panel::Loader::constraint(Layout::ConstraintType type, const string &n)
 270 {
 271         Widget &src = get_last_widget();
 272         Widget &tgt = *get_item(wdg_map, n);
 273         get_layout().add_constraint(src, type, tgt);
 274 }
 275
 276 void Panel::Loader::expand(bool h, bool v)
 277 {
 278         get_layout().set_expand(get_last_widget(), h, v);
 279 }
 280
 281 void Panel::Loader::ghost(bool g)
 282 {
 283         get_layout().set_ghost(get_last_widget(), g);
 284 }
 285
 286 void Panel::Loader::gravity(int h, int v)
 287 {
 288         get_layout().set_gravity(get_last_widget(), h, v);
 289 }
 290
 291 void Panel::Loader::grid(size_t cols)
 292 {
 293         Grid grd(get_layout(), cols);
 294         ArrangedLoader<Grid> ldr(*this, grd);
 295         load_sub_with(ldr);
 296 }
 297
 298 void Panel::Loader::layout()
 299 {
 300         Layout::Loader ldr(get_layout(), wdg_map);
 301         load_sub_with(ldr);
 302 }
 303
 304 template<>
 305 void Panel::Loader::unnamed_child<Panel>()
 306 {
 307         RefPtr<Panel> pnl = new Panel();
 308         load_sub(*pnl, wdg_map);
 309         obj.add(*pnl.get());
 310         last_widget = pnl.release();
 311 }
 312
 313
 314 template<typename T>
 315 Panel::ArrangedLoader<T>::ArrangedLoader(Loader &ldr, T &arr):
 316         arr_loader(arr)
 317 {
 318         add_auxiliary_loader(ldr);
 319         add_auxiliary_loader(arr_loader);
 320 }
 321
 322 } // namespace GLtk
 323 } // namespace Msp