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 "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 DataFile::LoadableTypeRegistry<Panel::Loader, Panel::Loader::AddChildType> Panel::widget_registry;
  28 bool Panel::widget_registry_init_done = false;
  29
  30 Panel::Panel():
  31         layout(0)
  32 {
  33         input_type = INPUT_NAVIGATION;
  34 }
  35
  36 Panel::~Panel()
  37 {
  38         delete layout;
  39         layout = 0;
  40 }
  41
  42 void Panel::set_layout(Layout *l)
  43 {
  44         l->set_container(*this);
  45         delete layout;
  46         layout = l;
  47 }
  48
  49 void Panel::autosize_special(const Part &part, Geometry &ageom) const
  50 {
  51         if(part.get_name()=="children" && layout)
  52                 layout->autosize(ageom);
  53 }
  54
  55 void Panel::render_special(const Part &part, GL::Renderer &renderer) const
  56 {
  57         if(part.get_name()=="children")
  58         {
  59                 for(list<Container::Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
  60                         if((*i)->widget->is_visible())
  61                                 (*i)->widget->render(renderer);
  62         }
  63 }
  64
  65 bool Panel::navigate(Navigation nav)
  66 {
  67         if(Container::navigate(nav))
  68                 return true;
  69
  70         if(nav==NAV_UP || nav==NAV_DOWN || nav==NAV_LEFT || nav==NAV_RIGHT)
  71         {
  72                 int nav_x = (nav==NAV_RIGHT ? 1 : nav==NAV_LEFT ? -1 : 0);
  73                 int nav_y = (nav==NAV_UP ? 1 : nav==NAV_DOWN ? -1 : 0);
  74
  75                 int origin_x, origin_y, origin_dim;
  76                 if(input_focus)
  77                 {
  78                         const Geometry &fgeom = input_focus->get_geometry();
  79                         origin_x = fgeom.x+(nav_x*0.5+0.5)*fgeom.w;
  80                         origin_y = fgeom.y+(nav_y*0.5+0.5)*fgeom.h;
  81                         origin_dim = abs(nav_x)*fgeom.h+abs(nav_y)*fgeom.w;
  82                 }
  83                 else
  84                 {
  85                         origin_x = geom.w*(0.5-nav_x*0.5);
  86                         origin_y = geom.h*(0.5-nav_y*0.5);
  87                         origin_dim = abs(nav_x)*geom.h+abs(nav_y)*geom.w;
  88                 }
  89
  90                 if(pointer_grabbed && pointer_focus==input_focus)
  91                         return false;
  92
  93                 Widget *sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
  94                 if(!sibling && input_focus)
  95                 {
  96                         const Geometry &fgeom = input_focus->get_geometry();
  97                         origin_x -= fgeom.w*(nav_x*0.5);
  98                         origin_y -= fgeom.h*(nav_y*0.5);
  99                         sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
 100                 }
 101
 102                 if(sibling)
 103                 {
 104                         set_input_focus(sibling);
 105                         if(Panel *panel = dynamic_cast<Panel *>(sibling))
 106                                 panel->navigate(nav);
 107                         return true;
 108                 }
 109         }
 110         else if(nav==NAV_NEXT || nav==NAV_PREVIOUS)
 111         {
 112                 vector<Widget *>::iterator i = find(nav_order, input_focus);
 113
 114                 if(nav==NAV_NEXT)
 115                 {
 116                         if(i!=nav_order.end())
 117                                 ++i;
 118                         if(i==nav_order.end())
 119                                 i = nav_order.begin();
 120                 }
 121                 else
 122                 {
 123                         if(i==nav_order.begin())
 124                                 i = nav_order.end();
 125                         --i;
 126                 }
 127
 128                 set_input_focus(*i);
 129
 130                 return true;
 131         }
 132
 133         return false;
 134 }
 135
 136 Widget *Panel::find_next_child(int origin_x, int origin_y, int origin_dim, int nav_x, int nav_y) const
 137 {
 138         Widget *sibling = 0;
 139         int best_score = 0;
 140         for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 141         {
 142                 if((*i)->widget==input_focus || !(*i)->widget->is_focusable())
 143                         continue;
 144
 145                 const Geometry &cgeom = (*i)->widget->get_geometry();
 146                 int dx = compute_delta(cgeom.x, cgeom.w, origin_x, origin_dim, nav_x);
 147                 int dy = compute_delta(cgeom.y, cgeom.h, origin_y, origin_dim, nav_y);
 148
 149                 int score = -1;
 150                 if(nav_y && nav_y*dy>=0)
 151                         score = nav_y*dy+abs(dx)*4;
 152                 else if(nav_x && nav_x*dx>=0)
 153                         score = nav_x*dx+abs(dy)*4;
 154
 155                 if(score>=0 && (!sibling || score<best_score))
 156                 {
 157                         sibling = (*i)->widget;
 158                         best_score = score;
 159                 }
 160         }
 161
 162         return sibling;
 163 }
 164
 165 int Panel::compute_delta(int pos, int dim, int origin_pos, int origin_dim, int nav)
 166 {
 167         if(nav<0)
 168                 return pos+dim-origin_pos;
 169         else if(nav>0)
 170                 return pos-origin_pos;
 171         else if(pos+dim<origin_pos-origin_dim/2)
 172                 return pos+dim+origin_dim/2-origin_pos;
 173         else if(pos>origin_pos+origin_dim/2)
 174                 return pos-origin_pos-origin_dim/2;
 175         else
 176                 return 0;
 177 }
 178
 179 void Panel::on_size_change()
 180 {
 181         if(layout)
 182                 layout->update();
 183 }
 184
 185 void Panel::on_child_added(Widget &wdg)
 186 {
 187         if(wdg.get_input_type()!=INPUT_NONE)
 188                 nav_order.push_back(&wdg);
 189
 190         if(layout)
 191         {
 192                 layout->add_widget(wdg);
 193                 signal_autosize_changed.emit();
 194         }
 195 }
 196
 197 void Panel::on_child_removed(Widget &wdg)
 198 {
 199         vector<Widget *>::iterator i = std::remove(nav_order.begin(), nav_order.end(), &wdg);
 200         if(i!=nav_order.end())
 201                 nav_order.erase(i, nav_order.end());
 202
 203         if(layout)
 204         {
 205                 layout->remove_widget(wdg);
 206                 signal_autosize_changed.emit();
 207         }
 208 }
 209
 210
 211 Panel::Loader::Loader(Panel &p, map<string, Widget *> &m):
 212         DataFile::DerivedObjectLoader<Panel, Widget::Loader>(p),
 213         wdg_map(m),
 214         last_widget(0)
 215 {
 216         if(!widget_registry_init_done)
 217         {
 218                 widget_registry_init_done = true;
 219                 register_child_type<Button>("button");
 220                 register_child_type<DragHandle>("draghandle");
 221                 register_child_type<Dropdown>("dropdown");
 222                 register_child_type<Entry>("entry");
 223                 register_child_type<HSlider>("hslider");
 224                 register_child_type<Image>("image");
 225                 register_child_type<Indicator>("indicator");
 226                 register_child_type<Label>("label");
 227                 register_child_type<List>("list");
 228                 register_child_type<Panel>("panel");
 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.add_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(unsigned 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