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